Exhibit 99.1

     HERCULES TEHCNOLOGY GROWTH CAPITAL ANNOUNCES ITS PARTICIPATION IN A $23
                    MILLION EQUITY FINANCING FOR ADIANA, INC.

    PALO ALTO, Calif., Sept. 8 /PRNewswire-FirstCall/ -- Hercules Technology
Growth Capital, Inc. (Nasdaq: HTGC), a leading debt and equity growth capital
provider to life science and Technology companies, announced on August 23, 2005
that it invested $500,000 as part of a $23 million equity financing for Adiana,
Inc. The Series D round was led by Tullis-Dickerson & Co., Inc. with
participation from new investors Hercules Technology and OrbiMed Advisors LLC,
and from existing investors Alloy Ventures, Boston Scientific Corporation,
Delphi Ventures, Abingworth Management, Forward Ventures, Oakwood Medical
Partners and the Kaiser Permanente Foundations.

    (Logo:  http://www.newscom.com/cgi-bin/prnh/20050609/SFTH149LOGO )
    "These funds will allow us to complete our clinical trial and to prepare
for market launch next year," said Paul Goeld, Adiana's President and Chief
Executive Officer. "Hercules was an important partner whose early support
allowed us the time to put together this equity financing."

    About Hercules Technology Growth Capital:

    Founded in December, 2003, Hercules Technology Growth Capital, Inc is a
publicly traded specialized finance company providing debt and equity growth
capital to technology-related companies at all stages of development. The
Company primarily finances privately-held companies backed by leading venture
capital and private equity firms and also may finance certain publicly-traded
companies. Hercules focuses its investments in companies active in the
technology and technology-related industries. The Company's investments are
originated through its principal office located in Silicon Valley, as well as
additional offices in the Boston, Chicago and Denver areas. Providing capital to
privately-held companies backed by leading venture capital and private equity
firms involves a certain degree of credit risk and may result in potential
losses.

    For more information or companies interested in learning more about
financing opportunities please visit http://www.herculestech.com . Emails can be
sent to info@herculestech.com or the main office number is 650-289-3060.

    About Adiana, Inc.

    Adiana is a private company that is developing an investigational, permanent
contraceptive device for women. The company's product is not yet approved for
sale in the United States and is currently being evaluated for safety and
effectiveness in a formal clinical trial involving more than 600 women. The
company expects to submit the results of this trial to the United States Food
and Drug Administration for approval in early 2006.

SOURCE  Hercules Technology Growth Capital, Inc.
    -0-                             09/08/2005
    /CONTACT:  Deborah Stapleton of Hercules Technology Growth Capital, Inc.,
+1-650-289-3078, or main, +1-650-289-3060, or info@herculestech.com/
    /Photo:  http://www.newscom.com/cgi-bin/prnh/20050609/SFTH149LOGO
                AP Archive:  http://photoarchive.ap.org
                PRN Photo Desk photodesk@prnewswire.com/
    /Web site:  http://www.herculestech.com /