THERMOGENESIS CORP.


                     UNIT PLACEMENT AGREEMENT



                                                 November 6, 1995

PARADISE VALLEY SECURITIES, INC.
11811 N. Tatum Blvd., Suite 4040
Phoenix, Arizona  85028

Gentlemen:

     The  undersigned,  THERMOGENESIS  CORP.,  a  Delaware corporation (the
"Company"), confirms its agreement with you as follows:

1.   DESCRIPTION OF SECURITIES AND OFFERING.

     (a)  The   Company   proposes   to   issue   and  sell  to   investors
("Purchasers") up to 88 units ("Units"), each consisting  of  50,000 shares
of  the  Company's  common  stock, $.001 par value ("Common Stock")  and  a
Common Stock Purchase Warrant ("Warrant") for the purchase of 12,500 shares
of Common Stock.  The Warrants  are  exercisable  at any time prior to July
31, 1996 at an exercise price of $1.50 per share, subject  to  reduction in
the exercise price under certain circumstances and to certain anti-dilution
provisions.  The price for each Unit is $25,000.

     The Units will be offered by delivery to prospective investors  of the
Company's  Private  Placement  Memorandum  ("Memorandum") dated October 30,
1995, together with Exhibits A through F annexed  thereto, (such Memorandum
and exhibits annexed thereto are called collectively herein the "Disclosure
Documents," which term shall include any additions or supplements thereto).

     (b)  You have advised us that you will act as  agent  for  the Company
for  this  offering.   You  will offer the Units on a "best efforts-all  or
none" basis as to the first 30 Units, having an aggregate value of $750,000
("Minimum Offering"), and on  a "best efforts" basis as to the remaining 58
Units having an aggregate value  of  $1,450,000.   The  offering  of the 88
Units having an aggregate value of $2,200,000 shall be referred to  as  the
"Maximum  Offering."   If  subscriptions  for  at  least 30 Units have been
received  and accepted by the Company before the expiration  date  of  this
offering, the  Company may have an initial closing ("Initial Closing") with
respect to such  subscribed Units and shall continue to offer the remaining
Units and may hold  additional  closings  with  respect  to such Units sold
before the expiration date of this offering.  The date of any closing under
this offering shall be referred to as a "Closing Date" and  the date of the
final  closing  under  this  offering  shall  be referred to as the  "Final
Closing Date."  You are authorized to sell the  Units  until  and including
November  30,  1995,  which  date may be extended to a date not later  than
December 31, 1995 by our mutual  agreement.  The term "Offering Period," as
used herein shall include the entire  period, as it may be extended, during
which the Units may be offered.

     In addition, the Company agrees to sell to you, for an aggregate price
of $100, warrants ("Placement Agent's Warrants")  for the purchase of up to
8.8 Units at $30,000 per Unit ("Placement Agent's Warrant  Units"),  on the
basis of one Placement Agent's Warrant Unit for each ten Units issued, sold
and  delivered  to  Purchasers.   The Units to be purchased pursuant to the
Placement Agent's Warrant shall have  the  same terms and conditions as the
Units offered hereby.

     The Common Stock, the Warrants, the shares  of Common Stock underlying
the Warrants (the "Warrant Shares"), the Placement Agent's Warrants and the
Placement Agent's Warrant Units (collectively, the  "Securities")  are more
fully described in the Disclosure Documents.

2.   REPRESENTATIONS,  WARRANTIES  AND  AGREEMENTS  OF  THE  COMPANY.   The
Company  represents,  warrants  to  and  agrees  with  you  that  except as
specifically described in the Memorandum:

     (a)  The  Company  has carefully prepared the Disclosure Documents  or
has  caused  them to be so  prepared.   When  read  as  one  document,  the
Disclosure Documents  furnish  all  information required to be furnished to
non-accredited  investors  under  Regulation  D  ("Regulation  D")  of  the
Securities and Exchange Commission ("SEC") promulgated under Securities Act
of 1933, as amended (the "1933 Act").

     (b)  Applications or other filings necessary to qualify the Securities
for sale or to obtain a valid exemption  from  qualification  in the states
set forth in Schedule 2(b) or as you may reasonably designate from  time to
time   (the  "Designated  States")  including  an  exemption  from  Federal
Securities  Laws  under  Regulation D, have been or will be timely filed to
permit the lawful offer and  sale  of  the  Units  in  such  states.  These
applications  or other filings, as they may be amended from time  to  time,
are referred to  herein  as  the  "Blue  Sky  Applications."   The Blue Sky
Applications shall be prepared and filed by your counsel together  with the
Company's assistance.

     (c)  The  Disclosure  Documents  and  Blue  Sky  Applications  and any
amendments or supplements thereto, to the best knowledge of the Company and
its  directors:  (i)  do and will, as the case may be, contain all material
statements and information  which are required to be included in accordance
with the 1933 Act, Regulation  D and applicable state law, (ii) do and will
in all material respects conform  to  the  requirements  of  the  1933 Act,
Regulation D and applicable state law and (iii) do not and will not, as the
case may be, include any untrue statement of material fact or omit to state
any  material  fact required to be stated therein or necessary to make  the
statements therein  not  misleading;  provided, however, that the foregoing
representations and warranties shall not  apply to information contained in
or omitted from the Disclosure Documents and  Blue  Sky Applications or any
such  amendment  or  supplement in reliance upon, and in  conformity  with,
written information furnished  to  the  Company  by  you  or on your behalf
specifically for use in the preparation thereof.

     (d)  The execution, delivery and performance of this Agreement  by the
Company  and  the consummation of the transactions herein contemplated will
not result in a  breach  or violation of any of the terms and provisions of
the Articles of Incorporation  or Bylaws of the Company as in effect on the
date hereof (the "Organizational  Documents"),  and  will  not constitute a
material  default  under  any indenture, mortgage, deed of trust  or  other
material agreement or instrument  to  which  the  Company  is a party or by
which  the  Company  is bound, and will not violate or contravene  (i)  any
governmental statute,  rule or regulation applicable to the Company or (ii)
any order, writ, judgment, injunction, decree, determination or award which
has been entered against  the  Company,  the  violation or contravention of
which  would  materially  and  adversely affect the  Company,  its  assets,
financial condition or operations.

     (e)  Subsequent to the dates  as  of which information is given in the
Disclosure Documents, except as contemplated therein and prior to the final
Closing,  the  Company  has not and will not  have  incurred  any  material
liabilities or material obligations,  direct or contingent, or entered into
any material transactions not in the ordinary course of business, and there
has not been or will not have been any change in its capitalization, or any
material adverse change in its condition  (financial  or other), net worth,
results of operations or prospects except as disclosed  in  the  Disclosure
Documents.

     (f)  Except as set forth in the Disclosure Documents, there is neither
pending  nor, to the knowledge of the Company, threatened any action,  suit
or proceeding  to  which  the  Company is a party before or by any court or
governmental agency or body.

     (g)  The Company has been duly  organized  in accordance with the laws
of Delaware and exists in good standing under such laws with full power and
authority to conduct its business as described in  the Disclosure Documents
and is duly qualified and in good standing in the State  of  California and
in  each other jurisdiction in which such qualification is required  except
where  the  failure  to so qualify, both individually and in the aggregate,
does not have a material  adverse  effect  on  the  condition (financial or
otherwise), business or prospects of the Company or on  its  properties  or
assets.

     (h)  The  Company  has  conducted,  is conducting and will conduct its
business  so  as  to comply in all material respects  with  all  applicable
statutes and regulations,  and  the Company is not charged with and, to the
knowledge of the Company, is not  under  investigation  with respect to any
violation  of  any  statutes  or regulations nor is it the subject  of  any
pending  or  threatened adverse proceedings  by  any  regulatory  authority
having jurisdiction  over its business or operations except as disclosed in
the Disclosure Documents.

     (i)  The financial statements, together with the related notes, as set
forth in the Disclosure  Documents,  present fairly the assets, liabilities
and  capital structure of the Company as  of  the  dates  presented.   Such
financial  statements,  together with the related notes, have been prepared
in accordance with generally  accepted  accounting  principles consistently
applied.  Ernst & Young LLP, who have audited the financial  statements  at
June  30,  1995  and  for  the  period  then  ended, are independent public
accountants within the meaning of the 1933 Act  and  the  rules promulgated
thereunder.

     (j)  Except as set forth in the Disclosure Documents,  the Company has
good and marketable title to all properties and assets described therein as
owned  by  it,  free  and  clear  of  all  liens, charges, encumbrances  or
restrictions.

     (k)  The Company has filed all necessary  federal and state income and
franchise tax returns and has paid all taxes shown  as due thereon; and the
Company  has  no  knowledge  of any tax deficiency that might  be  asserted
against it that might materially  and  adversely  affect  its  business  or
properties.

     (l)  The  Company  maintains  insurance  of  the  types and in amounts
generally  deemed adequate for its business and consistent  with  insurance
coverage maintained by similar companies and businesses, including, but not
limited to,  insurance  covering  all  real  and personal property owned or
leased  by  the  Company  against  theft,  damage,  destruction,   acts  of
vandalism,  products  liability,  and  all  other risks customarily insured
against, all of which insurance is in full force and effect.

     (m)  To  the  best of the knowledge of the  Company's  management,  no
labor disturbance by  the  employees  of  the Company exists or is imminent
that could reasonably be expected to have a  material adverse effect on the
conduct of the business, operations, financial  condition, or income of the
Company.

     (n)  To the best of the knowledge of the Company's management, neither
the Company nor any employee or agent of the Company  has  made any payment
of funds of the Company or received or retained any funds in  violation  of
law.

     (o)  The Company knows of no outstanding claims for services either in
the nature of a finder's fee or origination fee with respect to the sale of
the  Units  hereunder  resulting from its acts for which you or the Company
may be responsible other than as disclosed in the Disclosure Documents.

     (p)  The Securities,  when  issued  and delivered, will conform to the
description  thereof  under the captions "Description  of  Securities"  and
"Terms of the Offering" in the Memorandum.


     (q)  This  Agreement   has  been  duly  authorized  by  all  necessary
corporate action of the Company and, when executed and delivered, will be a
legal,  valid  and  binding  obligation  of  the  Company,  enforceable  in
accordance with its terms except  to  the  extent  that  the enforceability
hereof may be limited by bankruptcy, insolvency, moratorium or similar laws
affecting creditors' rights generally or by general principles  of  equity,
and except that the indemnification provisions of the Agreement may be held
to be violative of public policy under either federal or state laws in  the
context of the offer or sale of securities.

     (r)  The  Warrants and the Placement Agent's Warrants, when issued and
paid for, will be  duly  authorized,  validly  existing  obligations of the
Company, enforceable in accordance with their respective terms.

     (s)  The  shares  of Common Stock included in the Units,  the  Warrant
Shares, the Common Stock  included  in  the Placement Agent's Warrant Units
and the Warrant Shares underlying the Warrants  included  in  the Placement
Agent's  Warrant  Units,  when  issued  and paid for, will constitute  duly
authorized, legally and validly issued shares  of  Common Stock, fully paid
and non-assessable.

     (t)  Except  as  set  forth in the Disclosure Documents,  no  defaults
exist in the due performance  or  observance  of  any  material obligation,
term,  covenant or condition of any agreement or instrument  to  which  the
Company is a party or by which it or its properties may be bound.

     (u)  Neither  the  Company  nor  any  affiliate  has  offered to sell,
offered for sale or sold any securities, the offer to sell,  offer for sale
or sale of which would be integrated (as that term is used in  Rule  502(a)
of Regulation D) with the offers to sell, offers for sale and sales of  the
Shares  so  as to render the exemption provided by Section 3(b) and 4(2) of
the 1933 Act and similar exemptions under the laws of the Designated States
unavailable with respect to the offering of the Shares hereunder.

     (v)  Subject  in  part  to  the truth and accuracy of each Purchaser's
representations  set forth in the Unit  Purchase  Agreement  and  Purchaser
Questionnaire and  the representations and covenants of the Placement Agent
made in this Agreement  being  true,  the  offer,  sale and issuance of the
Units,  the  Common  Stock,  the Warrants and the Contingent  Warrants  are
exempt from the registration requirements  of the 1933 Act, and neither the
Company nor any authorized agent acting on its  behalf will take any action
hereafter that would cause the loss of such exemption.

     (w)  Neither the holders of the outstanding shares of Common Stock nor
the holders of any other securities or rights of  the  Company are entitled
to  pre-emptive  or  other  rights  or  agreements  for  the  purchase   or
acquisition  from  the  Company  of  any  shares  of its Common Stock or to
subscribe for the Units.  Except as specifically and in detail set forth in
the Disclosure Documents, the offering of the Units as contemplated by this
Agreement and the Memorandum does not give rise to  any  rights relating to
the registration of any securities of the Company, and the  Company has not
granted  or  agreed  to grant any registration rights, including  piggyback
rights, to any person  or  entity.   Except  as set forth in the Disclosure
Documents,  the  Company  is not a party or subject  to  any  agreement  or
understanding, and, to the  best  of  the  Company's knowledge, there is no
agreement  or  understanding  between any persons  and/or  entities,  which
affects or relates to the voting or giving of written consents with respect
to any security or by a director of the Company.

     (x)  Except as set forth in the Disclosure Documents, the Company does
not presently own or control, directly  or  indirectly, any interest in any
other corporation, association, or other business  entity;  nor is it not a
participant in any joint venture, partnership, or similar arrangement.

     (y)  The Company has sufficient title and ownership of all trademarks,
service  marks, trade names, copyrights, patents, trade secrets  and  other
proprietary  rights  necessary  for  its  business  as now conducted and as
proposed to be conducted as described in the Disclosure  Documents  without
any  conflict with or infringement of the rights of others.  Except as  set
forth  in  the  Disclosure  Documents,  there  are  no material outstanding
options, licenses, or agreements of any kind relating to the foregoing, nor
is  the  Company bound by or a party to any material options,  licenses  or
agreements of any kind with respect to the trademarks, service marks, trade
names, copyrights,  patents, trade secrets, licenses, and other proprietary
rights of any other person or entity.  The Company is not aware that any of
its executive officers is obligated under any contract (including licenses,
covenants or commitments  of  any nature) or other agreement, or subject to
any judgment, decree or order of  any  court or administrative agency, that
would interfere with the use of his or her  best  efforts  to  promote  the
interests of the Company or that would conflict with the Company's business
as proposed to be conducted.

     (z)  Except for agreements explicitly contemplated hereby or set forth
in  the  Disclosure  Documents,  there are no agreements, understandings or
proposed  transactions  between  the  Company  and  any  of  its  officers,
directors, affiliates, or any affiliate thereof.

     (aa) Except as set forth in the  Disclosure Documents, the Company has
not engaged in the past three (3) months  in  any  discussion  (i) with any
representative   of   any   corporation   or   corporations  regarding  the
consolidation or merger of the Company with or into any such corporation or
corporations, (ii) with any corporation, partnership,  association or other
business  entity  or  any  individual  regarding  the  sale, conveyance  or
disposition of all or substantially all of the assets of  the  Company or a
transaction  or  series  of  related transactions in which more than  fifty
percent (50%) of the voting power  of  the Company is disposed of, or (iii)
regarding  any  other  form  of acquisition,  liquidation,  dissolution  or
winding up of the Company.

     (ab) Except as set forth  in  the  Disclosure  Documents or herein, no
executive  officer  or  director of the Company or member  of  his  or  her
immediate family is indebted  to  the  Company, nor is the Company indebted
(or committed to make loans or extend or  guarantee credit) to any of them.
To  the  best  of  the Company's knowledge, except  as  set  forth  in  the
Disclosure Documents,  none  of  such  persons  has  any direct or indirect
ownership  interest in any firm or corporation with which  the  Company  is
affiliated or  with  which  the Company has a business relationship, or any
firm or corporation that competes  with  the Company, except that executive
officers  or  directors  of  the  Company and members  of  their  immediate
families may own stock in publicly  traded  companies that may compete with
the Company.  Except as set forth in the Disclosure Documents, no member of
the immediate family of any executive officer or director of the Company is
directly  or  indirectly  interested  in  any material  contract  with  the
Company.

3.   APPOINTMENT  OF  PLACEMENT AGENT AND REPRESENTATIONS,  WARRANTIES  AND
AGREEMENTS THEREOF.

     (a)  On the basis  of  the  representations, warranties and agreements
herein contained, and subject to the terms and conditions herein set forth,
the Company appoints you as its exclusive  agent during the Offering Period
to effect sales of the Units for the account  of the Company upon the other
terms and conditions set forth herein, in the Subscription  Agreements  and
in  the Memorandum, and you agree to use your best efforts as such agent to
produce  Purchasers for the Units during the Offering Period upon the terms
and conditions set forth herein.

     (b)  You  may  in your discretion use the services of other brokers or
dealers ("Participating  Dealers") in connection with the offering and sale
of the Units, and you may  allow and pay to such Participating Dealers (but
only as consideration for services rendered in placement of the Units), out
of the placement fee payable  to  you by the Company on account of the sale
of the Units, an amount as determined  by  you in your discretion; provided
that all such Participating Dealers are members  in  good  standing  of the
National  Association of Securities Dealers, Inc. ("NASD") who are actually
engaged in  the  investment  banking  or  securities  business and who have
executed and delivered to you the written agreement prescribed  by  Section
24(c) of Article III of the NASD's Rules of Fair Practice.

     (c)  As compensation for your services hereunder the Company will  pay
you  a  placement  fee  equal to 8% of the funds resulting from the sale of
Units pursuant to the Maximum  Offering  contemplated herein, provided that
the amount of the Minimum Offering has been sold.  In addition, the Company
agrees to pay you an amount equal to 3% of  the  funds  resulting  from the
sale  of  the  Units  pursuant to the Maximum Offering as a non-accountable
expense allowance.
     (d)  Your appointment  by  the  Company  as  exclusive Placement Agent
shall commence upon the date of the execution of this  Agreement, and shall
continue until and through the last day of the Offering  Period, unless (i)
the  Units shall be completely sold prior to that date, (ii)  the  offering
has been terminated by agreement between you and us, (iii) the terms of the
Bank Escrow  Agreement (hereinbelow defined), to which you are a party, are
not met and the  offering  is  terminated as a result thereof, or (iv) this
Agreement shall be terminated at a prior date as provided herein.

     (e)  You hereby acknowledge  that  you  are a party to the Bank Escrow
Agreement (herein "Bank Escrow Agreement") of  even  date  herewith between
yourselves, First Arizona Savings & Loan Association (the "Escrow  Agent"),
and the Company, the terms of which are incorporated herein by reference.

     (f)  At  your  option,  the  Company  will  sell  to you the Placement
Agent's  Warrants  to  purchase  the  number of shares specified  above  in
consideration of $100 aggregate purchase  price  for  all  of the Placement
Agent's  Warrants.   The  Placement Agent's Warrants are exercisable  at  a
price of $30,000 per Unit for  a  four  (4) year period commencing one year
after  the  Final  Closing  Date.  The holders  of  the  Placement  Agent's
Warrants will have the right  to  one  demand registration and an unlimited
number of piggyback registrations.  On the  Final Closing Date, the Company
will deliver to you that number of Placement  Agent's  Warrants as shall be
due to you.

     (g)  It is expressly understood and agreed that you are an independent
contractor  and that neither you nor your agents or employees  are  in  any
manner employees  of  the  Company  and  that  the  Company  shall  have no
responsibility  for unemployment insurance, social security, or income  tax
withholding in connection with your employees.

     (h)  You represent  that  you  are  a member of the NASD and a broker-
dealer registered as such under the Securities  Exchange  Act  of 1934 (the
"1934 Act") and under the securities laws of the states in which  the Units
will  be  offered  or  sold  by  you and in which states registration as  a
broker-dealer is required and/or necessary.

     (i)  You  will  offer the Units  in  accordance  with  the  applicable
provisions of the 1933 Act in a manner so as to preserve the exemption from
registration as provided  in  Section  3(b)  and/or  4(2)  of  the  Act and
Regulation  D thereunder and will not knowingly take, or omit to take,  any
action in connection  with  offers  and of sales of Units which would cause
the offering not to be made in compliance  with  Regulation D; you will not
offer the Units for sale in any jurisdiction unless  and  until the Company
or  your  counsel  shall  have  advised you that the Units are exempt  from
registration under the state securities  laws  applicable  thereto; and you
have  not  and  will  not  knowingly  take  any action which would  require
registration of the Units under any federal or  state  securities  laws, or
any  other  laws,  orders, rules or regulations without the consent of  the
Company.

     (j)  The offering  of  the  Units  will be limited to persons who have
completed   Purchaser  Questionnaires  (as  defined   in   the   Disclosure
Documents).

     (k)  You shall make no representations concerning the offering, except
as set forth  in the Disclosure Documents, and except for such supplemental
information relating  to  the  Company  as  shall  be made available by the
Company to offerees and their representatives as contemplated by Regulation
D.

     (l)  You  will  not use any offering or selling materials  other  than
materials furnished or approved by the Company.

     (m)  You will not  offer  the  Units  by  means of any form of general
solicitation or general advertising.

     (n)  In  placing,  offering,  offering  to sell,  offering  for  sale,
negotiating for sale or selling Units, you will,  subject  to the Company's
and  its  agents'  compliance with the same, utilize your best  efforts  to
comply with the applicable provisions of the 1933 Act.

4.   COVENANTS OF THE  COMPANY.   The Company covenants and agrees with you
that:

     (a)  The Company will use its  best  efforts  to  cause  the  Blue Sky
Applications in the Designated States and any subsequent amendments thereto
to  become  effective  (which  term as used in this Agreement shall include
taking all steps necessary to obtain  an exemption from registration of the
Units in a jurisdiction) as promptly as  possible;  provided, however, that
in no event shall (i) the Company be obligated to qualify to do business in
any  state  or  to  take any action which would subject it  to  general  or
unlimited service of  process  in any state where it is not now so subject,
(ii) any stockholder be required to escrow their shares of capital stock of
the Company (except for the lock-up agreement referred to in paragraph 5(c)
of this Agreement), or (iii) the  Company or any stockholder be required to
comply with any other requirements  which  they  reasonably deem to be duly
burdensome, except for the lock-up agreement as provided  for  in paragraph
5(d) of this Agreement; it will notify you promptly of any request  by  the
SEC  or  the  corporate  or  securities  departments, divisions or agencies
("Securities  Departments")  of  any  of  the  Designated  States  for  the
amendment  or supplementing of the Disclosure Documents  or  the  Blue  Sky
Applications;  it  will,  at  its  own  expense,  during  the  term of this
Agreement  and  thereafter  promptly  notify  you  of  the  filing  of such
amendments  or  supplements  to  the  Disclosure  Documents or the Blue Sky
Applications, as may be necessary to correct any statements or omissions if
any event shall have occurred as a result of which the Disclosure Documents
include  an  untrue  statement  of  a material fact or omit  to  state  any
material fact necessary to make the statements  therein not misleading; and
it will file or distribute no amendment to the Disclosure  Documents or the
Blue  Sky  Applications  to which you shall reasonably object after  having
been furnished a copy a reasonable time prior to the filing.

     (b)  Promptly upon becoming aware thereof, the Company will advise you
and, if requested, confirm  such advice in writing (i) of the effectiveness
of the Blue Sky Applications;  (ii) of the issuance of any orders affecting
the effectiveness of the Blue Sky Applications or the use of the Disclosure
Documents, or of the initiation  or  threatening of any proceeding for that
purpose;  and (iii) of any orders or other  communications  of  any  public
authority addressed  to  the  Company  suspending or threatening to suspend
qualification  of the Units for sale or any  exemption  therefrom  and  the
Company will use all reasonable efforts to prevent the issuance of any such
order or to obtain  lifting  of  such  an  order if such an order should be
issued.

     (c)  The  Company  will file and continue  to  file  and  supply  such
financial statements, reports and other information at such times as are or
may be reasonably required by the SEC and the Securities Departments of the
Designated States for so long as required for the placement of the Units or
for the compliance with any  conditions  or  requirements  relating  to the
effectiveness of the Blue Sky Applications.

     (d)  The Company will furnish to you, as soon as available, copies  of
(i)  the  Disclosure Documents, and (ii) for such period as delivery of the
Disclosure  Documents may be required by the 1933 Act or the applicable law
of the Designated  States,  any amended Disclosure Documents or supplements
thereto required to be prepared  pursuant  to  this  Agreement, all in such
reasonable quantities as you may from time to time request.

     (e)  The Company agrees to pay all expenses in connection with (i) the
preparation,  printing, duplicating and filing of the Disclosure  Documents
and Blue Sky Applications, including the costs of all copies thereof and of
any amendments  or  supplements  thereto  supplied  to you in quantities as
hereinabove stated, (ii) the preparation and delivery  of  the  instruments
evidencing  the  Securities, (iii) the qualification or exemption therefrom
of the Securities  under  the  1933 Act and applicable state laws, (iv) the
legal and other expenses of the  Company,  and  (v)  all  fees and expenses
regarding the Bank Escrow Agreement and the fees of the escrow agent.

     (f)  The Company agrees that during the one year period  commencing on
the  Final  Closing  Date of this offering it will not, without your  prior
written consent, sell,  contract  to  sell,  issue  for  other  purposes or
otherwise dispose of any securities of the Company other than (i) shares of
Common  Stock  issuable  on the exercise of any options, warrants or  other
rights which are disclosed  in  the Disclosure Documents and (ii) shares of
Common Stock issuable upon the exercise  of  options  granted to employees,
officers or directors after the date of this Agreement  if such options are
reasonable and are granted in good faith and at prices which  are  not less
than 85% of the fair market value of the Common Stock on the date of  grant
of such options.

     (g)  The Company will apply the proceeds from the sale of Units by the
Company  for the purposes set forth under the caption "Use of Proceeds"  in
the Memorandum.

     (h)  The  Company  will  make  available  the  transfer  record of the
Company in respect of the Securities for inspection by you during  the time
they remain outstanding.

     (i)  The Company will file Form D (as defined in Regulation D) and all
required  amendments  thereto  in  a  timely  manner  with  the SEC and the
Securities Departments of the Designated States and deliver copies  thereof
to  you, together with copies of all forms and other documents or materials
filed  either  before  or  after  the  Closing  Date  to  comply with State
securities laws.

     (j)  The Company will promptly deliver to you, without  charge (i) two
copies of the registration statement covering a public distribution  of any
of the Securities, as originally filed, and of each amendment thereto,  and
of  each  post-effective  amendment  thereto  filed  at  any  time  when  a
prospectus  relating to the securities to be sold thereunder is required to
be delivered  under  the  1933 Act, and all financial statements, schedules
and exhibits filed therewith  (including those incorporated by reference to
the extent not previously furnished  to  you),  and  (ii)  such  number  of
conformed copies of the registration statement, as originally filed, and of
each  amendment  and  post-effective  amendment  thereto (in each such case
excluding  exhibits),  as  you may reasonably require.   The  Company  will
promptly deliver, without charge,  to  you  or  such others whose names and
addresses  are designated by you as soon as possible  after  the  effective
date of the  registration statement and thereafter from time to time during
the period when  delivery  of a prospectus relating to the securities to be
sold thereunder is required  by the 1933 Act, as many printed copies as you
may  reasonably  request of the  final  prospectus  and  any  amendment  or
supplement thereto.

5.   CONDITIONS TO  YOUR  OBLIGATIONS.   Your  obligations to use your best
efforts  to  sell  the Units as provided herein shall  be  subject  to  the
accuracy, at the date  hereof  and  at  all  times  thereafter  up  to  and
including the Closing Date of any closing hereunder, of the representations
and  warranties  of  the  Company  contained herein, the performance by the
Company  of its obligations hereunder,  and  to  the  following  additional
conditions except to the extent you may specifically waive, in writing, any
condition otherwise required:

     (a)  The  Blue  Sky  Applications  shall  have become effective in all
Designated States necessary to successfully commence  sale of the Units not
later than the date required to make lawful the offer and sale of the Units
in such states; and no order suspending the effectiveness  thereof  or  the
use  of  the  Disclosure Documents shall have been issued and no proceeding
for that purpose  shall  have  been  initiated  or, to the knowledge of the
Company or you, threatened by the Securities Departments  of any Designated
State,  the  SEC  or any other governmental agency or commission,  and  any
request of the Securities  Departments  of  any Designated State or the SEC
for additional information (to be included in  the Blue Sky Applications or
the Disclosure Documents or otherwise) shall have been complied with to the
satisfaction of your counsel.

     (b)  The  Disclosure  Documents,  and  any  amendment   or  supplement
thereto,  shall  not  contain  any untrue statement of fact which,  in  the
opinion of your counsel, is material,  or  omits  to state a fact which, in
the  opinion  of  your counsel, is material and is required  to  be  stated
therein or is necessary to make the statements therein not misleading.

     (c)  Each of the directors and each stockholder owning more than 5% of
the  Company's outstanding  Common  Stock  shall  have  duly  executed  and
delivered  to  you  a  lock-up agreement in the form shown by Exhibit 5(d),
attached hereto.

     (d)  As of the Closing  Date  of  each  Closing  of this offering, you
shall  have  received  opinions,  addressed  to  you  and  to  the  several
Purchasers,  from  Messrs.  Bartel,  Eng, Miller & Torngren, to the  effect
that:

          (i)  The Company has been duly  organized  in accordance with the
Delaware Corporation Law and exists in good standing under  the laws of the
State  of Delaware with full corporate power and authority to  conduct  its
business  as  described  in the Disclosure Documents, and is duly qualified
and in good standing in the  State  of  California  and  in each additional
jurisdiction  in  which  such  qualification is required except  where  the
failure to so qualify, both individually  and  in  the  aggregate, does not
have a material adverse effect on the condition (financial  or  otherwise),
or business of the Company or on its properties or assets;

          (ii)  All consents, approvals, authorizations or orders  of,  and
filings,  registrations, and qualifications with  any court or governmental
body in the United States required for the consummation of the transactions
contemplated by this Agreement, other than with respect to state securities
laws have been made or obtained;

          (iii)   This  Agreement has been duly authorized by all necessary
corporate action of the Company and, when executed and delivered, will be a
legal,  valid  and  binding  obligation  of  the  Company,  enforceable  in
accordance with its terms  except  to  the  extent  that the enforceability
hereof may be limited by bankruptcy, insolvency, moratorium or similar laws
affecting  creditors' rights generally or by general principles  of  equity
and except that  the  indemnification  provisions  of this Agreement may be
held to be violative of public policy under either federal or state laws in
the context of the offer or sale of securities;

          (iv)  The execution, delivery and performance  of  this Agreement
by the Company and the consummation of the transactions herein contemplated
will not result in a breach or violation of any of the terms and provisions
of  the Organizational Documents of the Company, and will not constitute  a
material  default  under  any  indenture,  mortgage, deed of trust or other
material agreement or instrument known to such counsel to which the Company
is a party or by which it is bound, and will  not violate or contravene (A)
any  governmental statute, rule or regulation applicable  to  the  Company,
other  than  with respect to state securities laws, or (B) any order, writ,
judgment, injunction, decree, determination or award which has been entered
against the Company  and  of  which such counsel is aware, the violation or
contravention of which would materially  and  adversely affect the Company,
its assets, financial condition or operations;

          (v)  The Warrants and Placement Agent's Warrants, when issued and
paid for, will be duly authorized and existing  obligations of the Company,
enforceable in accordance with their respective terms  except to the extent
that   the   enforceability  may  be  limited  by  bankruptcy,  insolvency,
moratorium or  similar  laws  affecting  creditors'  rights generally or by
general principles of equity;

          (vi)   The  shares  of Common Stock included in  the  Units,  the
Warrant Shares, the Common Stock  included in the Placement Agent's Warrant
Units  and  the Warrant Shares underlying  the  Warrants  included  in  the
Placement Agent's  Warrant  Units  will,  when  duly  issued  and paid for,
constitute duly authorized, legally and validly issued shares of the common
stock, $.001 par value, of the Company, fully paid and non-assessable;

          (vii)   The authorized, issued and outstanding capital  stock  of
the  Company  conforms  to  the  descriptions  thereof  in  the  Disclosure
Documents.  To  the  knowledge  of such counsel after having conducted such
inquiry as they have deemed appropriate,  there are no outstanding options,
warrants, or other rights calling for the issuance  of, and no commitments,
plans or arrangements to issue or register, any shares  of capital stock of
the Company or any securities convertible into or exchangeable  for capital
stock of the Company other than as disclosed in the Disclosure Documents;

          (viii)   The  certificates  and instruments used to evidence  the
Common Stock and Warrants are each in due  and  proper  form as required by
the laws of the State of Delaware  and the Organizational  Documents of the
Company;

          (ix)   Neither  the holders of the outstanding shares  of  Common
Stock nor of any other securities  or rights of the Company are entitled to
pre-emptive or other rights or agreements  for  the purchase or acquisition
from the Company of any shares of its Common Stock  or to subscribe for the
Units.  Except as set forth in the Disclosure Documents the offering of the
Units as contemplated by this Agreement and the Memorandum  does  not  give
rise  to  any  rights relating to the registration of any securities of the
Company,  and  the   Company  has  not  granted  or  agreed  to  grant  any
registration rights, including  piggyback  rights, to any person or entity.
Except as set forth in the Disclosure Documents, the Company is not a party
or subject to any agreement or understanding,  and,  to  the  best  of such
counsel's  knowledge,  there  is  no agreement or understanding between any
persons and/or entities, which affects  or  relates to the voting or giving
of written consents with respect to any security  or  by  a director of the
Company.

          (x)  To the knowledge of such counsel after having conducted such
inquiry  as  they  have deemed appropriate and except as disclosed  in  the
Disclosure Documents,  there  is  no  pending or threatened action, suit or
proceeding  before  or  by  any court or governmental  agency  or  body  or
arbitration panel, to which the  Company  is  a  party,  or  to  which  any
property  of  the  Company  is  subject,  which  is  not referred to in the
Disclosure Documents, which in the opinion of such counsel, might result in
a material adverse change in the business, financial condition  or  results
of  operations or materially affect the properties or assets of the Company
taken as a whole; and

          (xi)   Nothing  has  come to the attention of such counsel during
the course of any of their work in connection with this Agreement which has
caused  them  to  believe  that the  Company  has  breached  any  of  their
representations, warranties  or  agreements  herein,  or has made an untrue
statement  of  material  fact  in  any of the Disclosure Documents  or  has
omitted to state a material fact necessary  in order to make the statements
made in the Disclosure Documents, in light of the circumstances under which
they were made, not misleading (it being understood  that such counsel need
express no opinion with respect to the financial statements included in the
Disclosure Documents).

          (xii)  To the knowledge of such counsel, there  are  no  material
agreements, contracts  or  instruments  known  to such counsel to which the
Company  is  a  party  or  by  which it is bound that  are  not  accurately
described in the Memorandum.

          In rendering the foregoing  opinion,  such counsel may rely as to
matters  of  fact  upon  certificates of the Company's  officers  and  such
opinion shall be made subject to the provisions of the Legal Opinion Accord
of the ABA Section of Business Law (1991).

     (e)  You shall have received  a  certificate,  dated and delivered the
Closing  Date,  addressed  to  you  and  the several Purchasers,  from  the
President and the Chief Financial Officer of the Company to the effect that
they have carefully examined the Disclosure  Documents  and  that they have
made a careful examination as to the facts hereinafter referred  to  and to
the  best  of their knowledge and belief as to all relevant factual matters
and their understanding  as  to  certain  legal  matters  based  upon their
discussions  of  such  legal  matters  with Company counsel and other legal
counsel:

          (i)   The  Company  has complied  with  all  the  agreements  and
satisfied all of the conditions  on  its  part to be performed or satisfied
pursuant to this Agreement at or prior to the Closing Date;

          (ii)   No  order suspending the effectiveness  of  the  Blue  Sky
Applications has been  issued  or  threatened  of  which  you have not been
previously notified pursuant to Section 4(b) hereof;

          (iii)  The Disclosure Documents and any amendments or supplements
thereto do not contain any untrue statement of a material fact  or  omit to
state any material fact required to be stated therein or necessary to  make
the statements therein not misleading, and since the date of the Memorandum
there  has  occurred  no  event  required  to be set forth in an amended or
supplemented Disclosure Documents which has not been so set forth;

          (iv)  Subsequent to the dates as of which information is given in
the Disclosure Documents, the Company has not  incurred  any liabilities or
obligations,   direct   or   contingent,   or  entered  into  any  material
transactions, not in the ordinary course of business and there has not been
any change in the capital structure or debt  of the Company or any material
adverse  change  in  the  financial  condition, net  worth  or  results  of
operations  of  the Company, except as disclosed  or  contemplated  in  the
Disclosure Documents; and

          (v)  Each of the representations and warranties of the Company in
this Agreement are true and correct as of such Closing Date.

     (f)  The Placement Agent shall be satisfied with the current status of
the Company's patents,  and  the  Placement  Agent  shall  have received an
opinion,  in  a form satisfactory to it, from the Company's patent  counsel
stating, to the best knowledge of such counsel, that the information in the
Disclosure Documents  pertaining  to  the  Company's  patents  is  true and
correct.

     (g)  You  shall  have  received  from  the Company or its counsel, all
information  required  to  enable  you to make such  investigation  of  the
Company  and  its  business  prospects as  you  desire,  including  without
limitation,  all  of  the  Company's  information  or  information,  notes,
memoranda and correspondence with the Food and Drug Administration, and the
Company  shall  have  made available  to  you  such  persons  as  you  deem
reasonably necessary or  appropriate in order to verify or substantiate any
information regarding the Company except such persons with whom the Company
has  fragile  business  relationships   or   is   otherwise  restricted  by
proprietary trade secret or confidentiality agreements.

     All  such  opinions, certificates, letters and documents  will  be  in
compliance with the  provisions hereof only if they are satisfactory to you
and your counsel.

6.   CONDITIONS TO THE COMPANY'S OBLIGATIONS. The obligation of the Company
to issue and deliver the  Securities  shall  be subject to the accuracy, at
the date hereof and at all times thereafter up to and including the Closing
Date,  of  your  representations  and  warranties  contained   herein,  the
performance by you of your obligations hereunder, and to the receipt by the
Company on the Closing Date of a certificate from one of your officers that
your representations and warranties in this Agreement are true and correct,
and  you  have  complied with all the agreements and satisfied all  of  the
conditions on your  part  to  be performed or satisfied at or prior to each
Closing Date.

7.   INDEMNIFICATION.

     (a)  The Company agrees to  indemnify  and  hold harmless you, each of
your officers, directors, employees, agents, registered representatives and
attorneys and each person, if any, who controls you  within  the meaning of
the   1933   Act,   the  1934  Act  or  applicable  state  securities  laws
(collectively  referred  to  as  "indemnified  persons"),  against  losses,
claims, damages  or  liabilities,  joint  or  several, to which you or such
indemnified persons may become subject under the  1933  Act,  the 1934 Act,
applicable  state  securities  law  or  otherwise,  insofar as such losses,
claims, damages or liabilities (or actions in respect thereof) arise out of
or are based upon any untrue statement or alleged untrue  statement  of any
material  fact  contained  in  the  Blue Sky Applications or the Disclosure
Documents, or any amendment or supplement  thereto,  or arise out of or are
based  upon  the omission or alleged omission to state therein  a  material
fact required  to  be  stated  therein  or  necessary to make the statement
therein  not  misleading  or out of any failure  of  the  Company  to  have
obtained or maintained an exemption  from  registration  of  the Securities
under the securities laws of any Designated State; and agrees  to reimburse
you and each indemnified person for any legal or other expenses  reasonably
incurred by you or such indemnified person in connection with investigating
or  defending  any such loss, claim, damage, liability or action, provided,
however, that the indemnity agreement contained in this paragraph (a) shall
not inure to the  benefit  of you or any indemnified person with respect to
any loss, claim, damage or liability  asserted  by a purchaser of any Units
if a copy of the Disclosure Documents was not given to such purchaser at or
prior to the time required under the 1933 Act and  prior  to the signing of
the  Subscription  Agreement  by such purchaser.  This indemnity  agreement
will be in addition to any liability which the Company may otherwise have.

     (b)  You will indemnify and  hold  harmless  the  Company, each of its
officers, directors, employees, agents and attorneys and  each  person,  if
any,  who controls the Company within the meaning of the Act, or applicable
state securities  laws (collectively referred to as "indemnified persons"),
against any losses,  claims,  damages  or liabilities, joint or several, to
which the Company, or such indemnified persons may become subject under the
1933  Act, the 1934 Act, applicable state  securities  law,  or  otherwise,
insofar  as  such  losses,  claims,  damages  or liabilities (or actions in
respect thereof) arise out of or are based upon a failure to furnish a copy
of  the  Disclosure  Documents  to  any offeree or purchaser  of  Units  as
required by the Act or applicable state  securities  law,  or  the offer or
sale of the Units other than upon the terms and conditions set forth herein
or in the Disclosure Documents, or the sale of the Units to an investor who
was  not suitable, provided that any oral or written statement made  by  an
investor  may  be  relied upon by you in determining whether an investor is
suitable or arise out  of  or  are  based upon any untrue or alleged untrue
statement of any material fact contained  in  the  Blue Sky Applications or
the Disclosure Documents or any amendment or supplement  thereto,  or arise
out  of  or  are  based  upon the omission or the alleged omission to state
therein a material fact required  to be stated therein or necessary to make
the statements therein not misleading, in each case to the extent, but only
to the extent, that such untrue statement  or  alleged  untrue statement or
omission or alleged omission was made in the Blue Sky Applications  or  the
Disclosure  Documents,  or  such  amendment or such supplement, in reliance
upon and in conformity with information furnished to the Company in writing
by you or on your behalf specifically  for  use in the preparation thereof;
and will reimburse any legal or other expense  reasonably  incurred  by the
Company or any such indemnified person in connection with investigation  or
defending  any  such  loss,  claim,  damage,  liability  or  action.   This
indemnity  agreement  will  be  in  addition to any liability which you may
otherwise have.

     (c)  Promptly  after  receipt  by  an  indemnified  party  under  this
paragraph 7 of notice of the commencement  of  any action, such indemnified
party  will,  if  a  claim  in respect thereof is to  be  made  against  an
indemnifying party under this paragraph 7, notify the indemnifying party of
the commencement thereof and  the  failure to notify the indemnifying party
will relieve it from any liability under  this paragraph 7; but omission to
notify the indemnifying party will not relieve  it from any liability which
it may have to any indemnified party otherwise than under this paragraph 7.
Upon the receipt of such notice, the indemnifying  party  shall  assume the
defense  thereof,  including  the  employment  of  counsel  and  payment of
expenses.  The indemnifying party shall not be liable for any settlement of
any such action effected without its written consent.

     (d)  In  the  event  you use the services of Participating Dealers  as
provided  in  paragraph  3(b),  each  such  Participating  Dealer  and  its
officers, directors, employees,  agents  attorneys  and controlling persons
shall be entitled to indemnification under this paragraph  7  to  the  same
extent as you and your indemnified persons.

     (e)  If  recovery is not available under the foregoing indemnification
provisions of this  Section for any reason other than as specified therein,
the parties entitled  to  indemnification  by  the  terms  thereof shall be
entitled  to  contribution  to  which the respective parties are  entitled,
there shall be considered the relative benefits received by each party from
the offering of the Units (taking into account the relationship between the
net proceeds of the offering of the  Units to the Company and the placement
fee received by the indemnified party), the parties' relative knowledge and
access to information concerning the matter with respect to which the claim
was  asserted, the opportunity to correct  and  prevent  any  statement  or
omission,  and  any  other  equitable  considerations appropriate under the
circumstances.  The Company and you agree that it would not be equitable if
the amount of such contribution were determined  by  pro rata or per capita
allocation (even if you and the Participating Dealers  were  treated as one
entity for such purpose) or by any other method of allocation that does not
reflect  the  equitable considerations referred to in this paragraph  7(e).
Notwithstanding  the equitable considerations referred to in this paragraph
7(e), neither you  (or any Participating Dealer) nor any person controlling
you shall be obligated to make contribution hereunder that in the aggregate
exceeds the aggregate purchase price of the Units with respect to which you
(or any Participating Dealer) received placement fees under this Agreement,
less the aggregate amount  of  any  damages  that you (or any Participating
Dealer) and your controlling persons, if any,  have otherwise been required
to  pay  in respect of the same claim or any substantially  similar  claim.
Each of the  obligations  of  yourselves  and  the Participating Dealers to
contribute are several and not joint and bear the  same  proportion  as the
amount  of  sales  commission  received by each of you bears to total sales
commissions received by all of you.

8.   REPRESENTATIONS   AND   AGREEMENTS    TO    SURVIVE   DELIVERY.    All
representations, warranties and agreements of the  Company  and  yourselves
herein  or  in  certificates  delivered  pursuant hereto, and the indemnity
agreements of the Company and you contained  in  paragraph  7 hereof, shall
remain   operative   and  in  full  force  and  effect  regardless  of  any
investigation or statement  as  to the results thereof made by or on behalf
of yourselves or any controlling  person, or by or on behalf of the Company
or any of its officers, directors,  agents,  employees,  attorneys  or  any
controlling  persons, as the case may be, and shall survive the termination
of this Agreement.

9.   EFFECTIVE DATE OF THIS AGREEMENT AND TERMINATION.

     (a)  This Agreement shall become effective upon its execution by you.

     (b)  You  shall have the right to terminate this Agreement at any time
prior  to the termination  of  the  offering  contemplated  herein  if  any
domestic or international event or act or occurrence has in your reasonable
judgment  materially  disrupted  or will in the immediate future materially
disrupt the nation's securities markets,  or  if  trading  on  the New York
Stock Exchange shall have been suspended or if the United States shall have
become  involved  in  a  war  or  like  military  activity, or if a banking
moratorium has been declared by the State of Arizona  or  the  State of New
York  or  any  states  contiguous  thereto  or by any federal authority  or
official, or if the Company shall have sustained  material  loss  by  fire,
flood,  accident,  hurricane, earthquake or other calamity that, regardless
of whether said loss  shall  have  been  insured,  will, in your reasonable
judgment, make it inadvisable to proceed with the offering  or  delivery of
the Units.

     If  you  elect  to  terminate  this  Agreement  as  provided  in  this
paragraph,  the  Company  shall be notified promptly by you by telephone or
telegram, confirmed by letter.

     (c)  This agreement shall  automatically  terminate  if  you  fail  to
continue to be registered and licensed as a broker-dealer with the National
Association of Securities Dealers, Inc. or to be qualified or registered as
a  broker-dealer  in  any  state  in  which  you have offered the Company's
securities.

     (d)  This  Agreement  shall terminate upon  thirty  (30)  days'  prior
written notice to the other party.

10.  NOTICES.  All notices,  requests,  demands  and  other  communications
under this Agreement shall be in writing and shall be deemed to  have  been
duly  given  on  the  date  of  delivery if delivered personally or sent by
overnight courier, with acknowledgment  of  receipt,  to  the party to whom
notice is to be given, or on the fifth day after mailing if  mailed  to the
party  to  whom  notice  is  to  be given, by registered or certified mail,
return  receipt  requested, postage  prepaid,  and  properly  addressed  as
follows:  if to Paradise  Valley  Securities,  Inc.,  at the address of its
principal office as shown in this Agreement; and if to  the Company, at its
principal  office.  Any party may change its address for purposes  of  this
paragraph by  giving  the  other party written notice of the new address in
the manner set forth above.

11.  PARTIES.  This Agreement  shall inure to the benefit of and be binding
upon you, the Company and your and  its  respective successors and assigns.
Nothing expressed or mentioned in this Agreement  is  intended  or shall be
construed to give any person or corporation, other than the parties  hereto
and  their  respective  successors and assigns and the controlling persons,
officers, directors, employees,  agents  and  attorneys of the parties, any
legal  or equitable right, remedy or claim under  or  in  respect  of  this
Agreement  or  any  provision  herein  contained;  this  Agreement  and all
conditions  and  provisions  hereof  being intended to be and being for the
sole  and  exclusive benefit of the parties  hereto  and  their  respective
successors and  assigns  and said controlling persons, officers, directors,
employees, agents and attorneys,  and for the benefit of no other person or
corporation.  No purchaser of any of  the  Units  shall  be  construed as a
successor or assign by reason of such purchase.

12.  INFORMATION   FURNISHED.    The  Company  hereby  confirms  that   the
statements with respect to the offering  of  the  Units  under  the caption
"Terms of the Offering" in the Memorandum and on the cover page thereof are
the  only portions of the Disclosure Documents furnished to the Company  by
you for  use  in the Disclosure Documents, and you hereby confirm that such
statements are true and do not omit to state a material fact required to be
stated therein or necessary to make the statements made not misleading.

13.  ATTORNEYS'  FEES.   If any action is necessary to enforce or interpret
the terms of this agreement,  the  prevailing  party  shall  be entitled to
reasonable  attorneys' fees and costs, in addition to any other  relief  to
which he is or  may  be  entitled.   This  provision  shall be construed as
applicable to the entire agreement.

14.  TIME OF ESSENCE.  Time shall be of the essence of this Agreement.

15.  CONSTRUCTION.   This Agreement shall be construed in  accordance  with
the internal laws of the State of Arizona.

16.  EXECUTION.   This   Agreement   may  be  executed  in  any  number  of
counterparts each of which taken together shall constitute one and the same
instrument.

17.  ENTIRE AGREEMENT.  This Agreement constitutes the entire understanding
between  the  parties  with respect to the  subject  matter  hereof.   This
Agreement can only be modified,  including  any  extension  of the Offering
Period,  by a written agreement duly signed by persons authorized  to  sign
agreements on behalf of the respective parties.



                                                                A:\UNITPLAC.AGR


     If the foregoing is in accordance with your understanding, please sign
below and  return  to  us  a  counterpart  hereof, and upon your acceptance
hereof, this letter and the acceptance hereof  shall  constitute  a binding
agreement between you and the Company.


                                   Very truly yours,

                                   THERMOGENESIS CORP.



                                   by  /S/  PHILIP H. COELHO
                                   Philip H. Coelho, President




Accepted and agreed to as of the
date first above written by:


PARADISE VALLEY SECURITIES, INC.



by  /S/  MICHAEL E. JACOBSON
 Michael E. Jacobson,
 Senior Vice-President






          LIST OF DESIGNATED STATES AND/OR JURISDICTIONS


                                  ARIZONA
                                CALIFORNIA
                                 COLORADO
                                  FLORIDA
                                  GEORGIA
                                 ILLINOIS
                                 MINNESOTA
                                  NEVADA
                                NEW JERSEY
                                 NEW YORK






























                           SCHEDULE 2(B)


                        LOCK UP AGREEMENT

                                          _________________, 1995



Paradise Valley Securities, Inc.
11811 North Tatum Blvd., Suite 4040
Phoenix, Arizona  85028

     Re:  THERMOGENESIS CORP.

Gentlemen:

     I  am  a  beneficial  owner  of  securities of THERMOGENESIS CORP.,  a
Delaware corporation (the "Company").   I  understand  that  you propose to
make a private placement of securities of the Company.  I acknowledge  that
such  action  by  you  will  be  of material benefit to the Company and the
undersigned as a beneficial owner of the Company's securities.

     In consideration of the foregoing,  and  in order to induce you to act
as set forth above, I confirm my agreement that  I  will  not, without your
prior  approval,  offer  for  sale, sell, pledge, hypothecate or  otherwise
dispose of, directly or indirectly,  any  of  the  shares  of the Company's
common  stock  which I may own legally or beneficially ("Shares"),  in  any
manner whatsoever  whether  pursuant  to  Rule  144  of  the Regulations or
otherwise,  for  a  period  of  one  hundred  eighty  (180)  days from  the
effectiveness of the registration statement filed pursuant to  Section  7.2
of  the  Unit  Purchase Agreements entered into between the Company and the
respective purchasers of Units of the aforementioned private placement.

     I further understand  that  the  Company  will  execute  an  placement
agreement with you concerning the proposed private placement and that  such
agreement  will  provide  that  the  Company will take such steps as may be
necessary to enforce the foregoing provisions  and  restrict  the  sale  or
transfer  of  the  Shares as provided herein including, but not limited to,
notification  to  the   Company's   transfer   agent   regarding  any  such
restrictions;  and  I  hereby agree to and authorize any such  actions  and
acknowledge that the Company  and  you  are  relying upon this agreement in
taking any such actions.

                              Very truly yours,



                              ___________________________________
                              (Shareholder)

                           EXHIBIT 5(D)


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