Document:

EXHIBIT 10.22

NEITHER THIS WARRANT NOR THE COMMON STOCK THAT MAY BE ACQUIRED UPON THE EXERCISE
HEREOF ("WARRANT SHARES"), AS OF THE DATE OF ISSUANCE HEREOF, HAS BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
OR UNDER THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD, PLEDGED,
TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT
WITH RESPECT THERETO UNDER THE SECURITIES ACT AND COMPLIANCE WITH ANY APPLICABLE
STATE SECURITIES LAW, OR UNLESS THE COMPANY RECEIVES AN OPINION OF COUNSEL,
SATISFACTORY TO THE COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED. THIS
WARRANT AND THE COMPANY'S SUBSCRIPTION AGREEMENT WITH THE HOLDER SET FORTH THE
COMPANY'S OBLIGATIONS TO REGISTER THE ISSUANCE OF THE WARRANT SHARES. A COPY OF
SUCH SUBSCRIPTION AGREEMENT IS AVAILABLE FOR INSPECTION AT THE COMPANY'S OFFICE.

                                                          For the Purchase of
                                                          ____ Shares of
No. __                                                    Common Stock

                           WARRANT FOR THE PURCHASE OF
                             SHARES OF COMMON STOCK
                                       OF
                          ISOTOPE SOLUTIONS GROUP, INC.

        Isotope Solutions Group, Inc. (f/k/a EDG Capital, Inc.), a New York
corporation ("Company"), hereby certifies that for value received,
________________, residing at ___________________________ or his, her or its
registered assigns ("Registered Holder"), is entitled, subject to the terms set
forth below, to purchase from the Company, at any time or from time to time
during the period commencing on December 26, 2001 and ending on December 25,
2006 (the "Expiration Date"), _______ ("Initial Number") shares of common stock,
$.001 par value, of the Company ("Common Stock"), at an exercise price equal to
$2.00 per share. This Warrant is one of a series of similar Warrants of like
tenor to purchase up to 32,500 shares of Common Stock (collectively, the
"Warrants"). The number of shares of Common Stock purchasable upon exercise of
this Warrant, and the exercise price per share, each as adjusted from time to
time pursuant to the provisions of this Warrant, are hereinafter referred to as
the "Warrant Shares" and the "Exercise Price," respectively.

        The Company has entered into a Placement Agent Agreement dated August
24, 2001 (as amended to date and as may be further amended, the "Placement Agent
Agreement"), with G-V Capital Corp. relating to a Private Offering (the "Private
Offering") of Common Stock on substantially the terms outlined in the Placement
Agent Agreement, which is available for inspection at the Company's principal
office.

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        1. Exercise.

           (a) This Warrant may be exercised by the Registered Holder, in whole
or in part, by the surrender of this Warrant (with the Notice of Exercise Form
attached hereto duly executed by such Registered Holder) at the principal office
of the Company, or at such other office or agency as the Company may designate,
accompanied by payment in full, in lawful money of the United States, of an
amount equal to the then applicable Exercise Price multiplied by the number of
Warrant Shares then being purchased upon such exercise.

           (b) Each exercise of this Warrant shall be deemed to have been
effected immediately prior to the close of business on the day on which this
Warrant shall have been surrendered to the Company as provided in subsection
1(a) above. At such time, the person or persons in whose name or names any
certificates for Warrant Shares shall be issuable upon such exercise as provided
in subsection 1(c) below shall be deemed to have become the holder or holders of
record of the Warrant Shares represented by such certificates.

           (c) Within five (5) business days after the exercise of the purchase
right represented by this Warrant, the Company at its expense will use its best
efforts to cause to be issued in the name of, and delivered to, the Registered
Holder, or, subject to the terms and conditions hereof, to such other individual
or entity as such Holder (upon payment by such Holder of any applicable transfer
taxes) may direct:

              (i) a certificate or certificates for the number of full shares of
Warrant Shares to which such Registered Holder shall be entitled upon such
exercise plus, in lieu of any fractional share to which such Registered Holder
would otherwise be entitled, cash in an amount determined pursuant to Section 3
hereof, and

              (ii) in case such exercise is in part only, a new warrant or
warrants (dated the date hereof) of like tenor, stating on the face or faces
thereof the number of shares of Common Stock currently stated on the face of
this Warrant minus the number of such shares of Common Stock purchased by the
Registered Holder upon such exercise as provided in subsection 1(a) above.

           (d) Conversion Right. In lieu of the payment of the Exercise Price in
the manner required by Section 1(a), the Holder shall have the right (but not
the obligation) to convert any exercisable but unexercised portion of this
Warrant into Common Stock ("Conversion Right") as follows: upon exercise of the
Conversion Right, the Company shall deliver to the Holder (without payment by
the Holder of any of the Exercise Price in cash) that number of shares of Common
Stock equal to the quotient obtained by dividing (x) the "Value" (as defined
below) of the portion of the Warrant being converted by (y) the Current Market
Price (as defined below). The "Value" of the portion of the Warrant being
converted shall equal the remainder derived from subtracting (a) the Exercise
Price multiplied by the number of shares of Common Stock underlying the portion
of the Warrant being converted from (b) the Current Market Price of the Common
Stock multiplied by the number of shares of Common Stock underlying the portion
of the Warrant being converted. As used herein, the term "Current Market Price"
per share of Common Stock or any other security at any date means (i) if the
Common Stock or such other security is not registered under the Securities
Exchange Act of 1934, as amended ("Exchange Act"), (A) the value of the Common
Stock or such other security, determined in good faith by the Board of Directors
and certified in a board resolution, based on the most recently completed
arm's-length transaction between the Company and a person other than an
affiliate of the Company or between any two such persons and the closing of
which occurs on such date or shall have occurred within the six-month period
preceding such date, or (B) if no such transaction shall have occurred on such
date or within such six-month period, the value of the Common Stock or such
other security as determined in good faith by resolution of the Board of
Directors, based on the best information available to it, or (ii) if the Common
Stock or such other security is registered under the Exchange Act, the average

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of the daily closing bid prices of the Common Stock or such other security for
each trading day during the period commencing 10 trading days before such date
and ending on the date one day prior to such date, or if the security has been
registered under the Exchange Act for less than 10 consecutive trading days
before such date, the average of the daily closing bid prices (or such
equivalent) for all of the trading days before such date for which daily closing
bid prices are available as reported by the principal securities exchange on
which the Common Stock is listed or admitted to trading or as reported by
NASDAQ; provided, however, that if the closing bid price is not determinable for
at least five trading days in such period, the "Current Market Price" of the
security shall be determined as if the security were not registered under the
Exchange Act. Notwithstanding the foregoing, as used herein "closing bid price"
means, in each case at the close of trading hours (not including extended
trading hours), (i) if the Common Stock is listed on the New York Stock Exchange
("NYSE") or the American Stock Exchange ("AMEX"), the last reported sale price
or (ii) if the Common Stock is listed on the Nasdaq National Market System,
SmallCap Market or over-the-counter bulletin board, the closing bid price for
the Common Stock as reported by the Nasdaq National Market System, SmallCap
Market or over-the-counter bulletin board, as applicable, or (iii) if the Common
Stock is not listed or admitted for trading on any national securities exchange
and is not reported by NYSE, AMEX, Nasdaq National Market System, SmallCap
Market or over-the-counter bulletin board, or if the Common Stock is traded in
the over-the-counter market but bid quotations are not published on Nasdaq, the
closing bid price for the Common Stock as furnished by a broker-dealer which
regularly furnishes price quotations for the Common Stock. The Conversion Right
may be exercised by the Holder on any business day after the date hereof and not
later than the Expiration Date by delivering this Warrant to the Company with a
duly executed exercise form attached hereto with the conversion section
completed.

        2. Adjustments.

           (a) Split, Subdivision or Combination of Shares. If the outstanding
shares of the Company's Common Stock at any time while this Warrant remains
outstanding and unexpired shall be subdivided or split into a greater number of
shares or a dividend in Common Stock shall be paid in respect of Common Stock,
the Exercise Price in effect immediately prior to such subdivision or at the
record date of such dividend shall, simultaneously with the effectiveness of
such subdivision or split or immediately after the record date of such dividend
(as the case may be), be proportionately decreased. If the outstanding shares of
Common Stock shall be combined or reverse-split into a smaller number of shares,
the Exercise Price in effect immediately prior to such combination or reverse
split shall, simultaneously with the effectiveness of such combination or
reverse split, be proportionately increased. When any adjustment is required to
be made in the Exercise Price, the number of Warrant Shares purchasable upon the
exercise of this Warrant shall be changed to the number determined by dividing
(i) an amount equal to the number of shares issuable upon the exercise of this
Warrant immediately prior to such adjustment, multiplied by the Exercise Price
in effect immediately prior to such adjustment, by (ii) the Exercise Price in
effect immediately after such adjustment.

           (b) Reclassification Reorganization, Consolidation or Merger. In the
case of any reclassification of the Common Stock (other than a change in par
value or a subdivision or combination as provided for in subsection 2(a) above),
or any reorganization, consolidation or merger of the Company with or into
another corporation (other than a merger or reorganization with respect to which
the Company is the continuing corporation and which does not result in any
reclassification of the Common Stock), or a transfer of all or substantially all
of the assets of the Company, or the payment of a liquidating distribution then,
as part of any such reorganization, reclassification, consolidation, merger,
sale or liquidating distribution, lawful provision shall be made so that the
Registered Holder of this Warrant shall have the right thereafter to receive

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upon the exercise hereof (to the extent, if any, still exercisable) the kind and
amount of shares of stock or other securities or property that such Registered
Holder would have been entitled to receive if, immediately prior to any such
reorganization, reclassification, consolidation, merger, sale or liquidating
distribution, as the case may be, such Registered Holder had held the number of
shares of Common Stock that were then purchasable upon the exercise of this
Warrant. In any such case, appropriate adjustment (as reasonably determined by
the Board of Directors of the Company) shall be made in the application of the
provisions set forth herein with respect to the rights and interests thereafter
of the Registered Holder of this Warrant such that the provisions set forth in
this Section 2 (including provisions with respect to the Exercise Price) shall
thereafter be applicable, as nearly as is reasonably practicable, in relation to
any shares of stock or other securities or property thereafter deliverable upon
the exercise of this Warrant.

           (c) Price Adjustment. No adjustment in the per share Exercise Price
shall be required unless such adjustment would require an increase or decrease
in the Exercise Price of at least $0.01 (as adjusted to reflect stock splits,
stock dividends, recapitalizations and the like); provided, however, that any
adjustments that by reason of this subsection are not required to be made shall
be carried forward and taken into account in any subsequent adjustment. All
calculations under this Section 2 shall be made to the nearest cent or to the
nearest 1/100th of a share, as the case may be.

           (d) Price Reduction. Notwithstanding any other provision set forth in
this Warrant, at any time and from time to time during the period that this
Warrant is exercisable, the Company, in it sole discretion, upon written notice
to the Registered Holder, may reduce the Exercise Price or extend the period
during which this Warrant is exercisable.

           (e) No Impairment. The Company will not, by amendment of its
Certificate of Incorporation or through any reorganization, transfer of assets,
consolidation, merger, dissolution, issue or sale of securities or any other
voluntary action, avoid or seek to avoid the observance or performance of any of
the terms to be observed or performed hereunder by the Company but will at all
times in good faith assist in the carrying out of all the provisions of this
Section 2 and in the taking of all such actions as may be necessary or
appropriate in order to protect against impairment of the rights of the
Registered Holder of this Warrant to adjustments in the Exercise Price.

           (f) Notice of Adjustment. Upon the happening of any event requiring
an adjustment of the Exercise Price hereunder, the Company shall forthwith give
written notice thereto to the Registered Holder of this Warrant stating the
adjusted Exercise Price and the adjusted number of Warrant Shares resulting from
such event and setting forth in reasonable detail the method of calculation and
the facts upon which such calculation is based.

        3. Fractional Shares. The Company shall not be required upon the
exercise of this Warrant to issue any fractional shares, but shall make an
adjustment thereof in cash on the basis of the closing bid price of the
Company's Common Stock on the over-the-counter market as reported by Nasdaq or
the closing price on a national securities exchange on the trading day
immediately prior to the date of exercise, whichever is applicable, or if
neither is applicable, then on the basis of the then fair market value of the
Company's Common Stock as shall be reasonably determined by resolution of the
Board of Directors of the Company.

        4. Limitation on Sales. Each holder of this Warrant acknowledges that
this Warrant and the Warrant Shares have not been registered under the
Securities Act of 1933, as amended ("Securities Act"), as of the date of
issuance hereof and agrees not to sell, pledge, distribute, offer for sale,
transfer or otherwise dispose of this Warrant, or any Warrant Shares issued upon

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its exercise, in the absence of (i) an effective registration statement under
the Securities Act as to this Warrant or such Warrant Shares and registration or
qualification of this Warrant or such Warrant Shares under any applicable Blue
Sky or state securities law then in effect or (ii) an opinion of counsel,
reasonably satisfactory to the Company, that such registration and qualification
are not required.

        Without limiting the generality of the foregoing, unless the offering
and sale of the Warrant Shares to be issued upon the particular exercise of the
Warrant shall have been effectively registered under the Securities Act, the
Company shall be under no obligation to issue the shares covered by such
exercise unless and until the Registered Holder shall have executed an
investment letter in customary form and substance reasonably satisfactory to the
Company, including a warranty at the time of such exercise that it is acquiring
such shares for its own account, and will not transfer the Warrant Shares unless
pursuant to an effective and current registration statement under the Securities
Act or an exemption from the registration requirements of the Securities Act and
any other applicable restrictions, in which event the Registered Holder shall be
bound by the provisions of a legend or legends to such effect which shall be
endorsed upon the certificate(s) representing the Warrant Shares issued pursuant
to such exercise. In such event, the Warrant Shares issued upon exercise hereof
shall be imprinted with a legend in substantially the following form:

           "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES
           ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS,
           AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHOUT
           AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR PURSUANT
           TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF SAID ACT
           OR APPLICABLE STATE SECURITIES LAWS, SUPPORTED BY AN OPINION
           OF COUNSEL, REASONABLY SATISFACTORY TO THE COMPANY THAT SUCH
           REGISTRATION IS NOT REQUIRED."

        5. Certain Dividends. If the Company pays a dividend or makes a
distribution on the Common Stock payable otherwise than in cash out of earnings
or earned surplus (determined in accordance with generally accepted accounting
principles) except for a stock dividend payable in shares of Common Stock (a
"Property Dividend"), then the Company will pay or distribute to the Registered
Holder of this Warrant, upon the exercise hereof, in addition to the Warrant
Shares purchased upon such exercise, the Property Dividend that would have been
paid to such Registered Holder if it had been the owner of record of such shares
of Warrant Shares immediately prior to the date on which a record is taken for
such Property Dividend or, if no record is taken, the date as of which the
record holders of Common Stock entitled to such dividends or distribution are to
be determined.

        6. Registration Rights of Warrant Holder.

           (a) "Piggy-back" Rights. If at any time the Company shall file a
registration statement (excluding registration statements on Forms S-4 and S-8),
the holders of the Warrants (or the Warrant Shares underlying the Warrants to
the extent Warrants have been exercised) shall have the right to include in such
registration statement the Warrant Shares. If the registration statement is
filed in connection with an underwritten registration on behalf of the Company,
and the managing underwriters advise the Company in writing that in their good
faith opinion the number of securities requested to be included in such
registration exceeds the number that can be sold in such offering, the Company
will include in such registration statement (i) first, the securities the
Company proposes to sell, (ii) second, the Warrant Shares requested to be

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included in such registration statement and such other securities requested to
be included in such registration statement by the holders of the Common Stock
issued in the Private Offering and by other security holders having contractual
registration rights that exist on the date hereof (collectively, "Other
Holders"), pro rata among the holders of the Warrant Shares ("Holders") and the
Other Holders on the basis of the number of Warrant Shares of such Holders and
securities of the Other Holders requested to be included in such registration
statement, and (iii) third, other securities requested to be included in such
registration statement.

        If the registration statement is filed in connection with an
underwritten secondary registration on behalf of Other Holders, and the managing
underwriters advise the Company in writing that in their good faith opinion the
number of securities requested to be included in such registration statement
exceeds the number that can be sold in such offering, the Company will include
in such registration statement (i) first, the securities of such Other Holders
requesting such registration pursuant to demand registration rights, pro rata
among such Other Holders, (ii) second, Warrant Shares requested to be included
in such registration statement, and (iii) third, other securities requested to
be included in such registration statement. The Company shall keep the
registration statement effective and current until the date that the Warrant
Shares may be sold pursuant to Rule 144 without resale or volume restrictions or
one year from the date such registration statement becomes effective, whichever
occurs first. In the event of such a proposed registration, the Company shall
furnish the then Holders of Warrant Shares with not less than twenty (20) days'
written notice prior to the proposed date of filing of such registration
statement. Such notice to the Holders shall continue to be given for each
registration statement filed by the Company until such time as all of the
Warrant Shares have been sold by the Holders. The Holders of the Warrant Shares
shall exercise the "piggy-back" rights provided for herein by giving written
notice within ten (10) days of the receipt of the Company's notice of its
intention to file a registration statement.

           (b) Fees and Expenses. In any registration statement in which Warrant
Shares are included pursuant to this Section 6, the Company shall bear all
expenses and pay all fees incurred in connection therewith, exclusive of
underwriting discounts and commissions payable with respect to the Warrant
Shares and the fees and expenses of any professionals engaged by the holders of
such shares or the Warrants, but including the expenses of providing a
reasonable number of copies of the prospectus contained therein to the holders
of such securities.

           (c) Indemnification by Company. The Company shall indemnify the
Holder(s) of the Warrant Shares to be sold pursuant to any registration
statement hereunder, the officers and directors of each Holder and each person,
if any, who controls such Holders within the meaning of Section 15 of the
Securities Act or Section 20(a) of the Exchange Act, or any state securities law
or regulation, against all loss, claim, damage, expense or liability (including
all reasonable attorneys' fees and other expenses reasonably incurred in
investigating, preparing or defending against any claim whatsoever incurred by
the indemnified party in any action or proceeding between the indemnitor and
indemnified party or between the indemnified party and any third party or
otherwise) to which any of them may become subject under the Securities Act, the
Exchange Act or any other statute or at common law or otherwise arising from
such registration statement or based upon any untrue statement or alleged untrue
statement of a material fact contained in (i) any preliminary prospectus, the
registration statement or prospectus (as from time to time each may be amended
and supplemented); (ii) any post-effective amendment or amendments or any new
registration statement and prospectus in which are included the Warrant Shares;
or (iii) any application or other document or written communication
(collectively called "application") executed by the Company or based upon
written information furnished by the Company in any jurisdiction in order to
qualify the Warrant Shares under the securities laws thereof or filed with the
Securities and Exchange Commission, any state securities commission or agency,

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Nasdaq or any securities exchange; or the omission or alleged omission therefrom
of a material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading, unless such statement or omission is made in reliance upon, and
in conformity with, written information furnished to the Company by and with
respect to such registered holders ("Purchaser Information") expressly for use
in any preliminary prospectus, the registration statement or prospectus, or any
amendment or supplement thereof, or in any application, as the case may be, or
unless the indemnitee failed to deliver a final prospectus in which the material
misstatement or omission was corrected. The Company agrees promptly to notify
such Holders of the commencement of any litigation or proceedings against the
Company or any of its officers, directors or controlling persons in connection
with the issue and sale or resale of the Warrant Shares or in connection with
the registration statement or prospectus.

           (d) Elimination of Registration Rights. Notwithstanding anything to
the contrary in Section 6(a), no holders of Warrant Shares shall be entitled to
have such securities registered under the Securities Act in accordance with the
provisions of Section 6(a) if, in the opinion of counsel to the Company, they
may be sold without restriction pursuant to Rule 144(k) under the Securities Act
and any restrictive legends under the Securities Act are removed from the
certificates representing such securities and any stop transfer order for such
certificates is removed.

        7. Notices of Record Date. In case:

           (a) the Company shall take a record of the holders of its Common
Stock (or other stock or securities at the time deliverable upon the exercise of
this Warrant) for the purpose of entitling or enabling them to receive any
dividend or other distribution, or to receive any right to subscribe for or
purchase any shares of any class or any other securities, or to receive any
other right, or

           (b) of any capital reorganization of the Company, any
reclassification of the capital stock of the Company, any consolidation or
merger of the Company with or into another corporation (other than a
consolidation or merger in which the Company is the surviving entity), or any
transfer of all or substantially all of the assets of the Company, or

           (c) of the voluntary or involuntary dissolution, liquidation or
winding-up of the Company, then, and in each such case, the Company will mail or
cause to be mailed to the Registered Holder of this Warrant a notice specifying,
as the case may be, (i) the date on which a record is to be taken for the
purpose of such dividend, distribution or right, and stating the amount and
character of such dividend, distribution or right, or (ii) the effective date on
which such reorganization, reclassification, consolidation, merger, transfer,
dissolution, liquidation or winding-up is to take place, and the time, if any is
to be fixed, as of which the holders of record of Common Stock (or such other
stock or securities at the time deliverable upon the exercise of this Warrant)
shall be entitled to exchange their shares of Common Stock (or such other stock
or securities) for securities or other property deliverable upon such
reorganization, reclassification, consolidation, merger, transfer, dissolution,
liquidation or winding-up. Such notice shall be mailed at least ten (10)
business days prior to the record date or effective date for the event specified
in such notice.

        8. Reservation of Stock. The Company covenants and agrees that all
Common Stock which may be issued upon exercise of this Warrant will, upon
issuance and payment therefor, be legally and validly issued and outstanding,

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fully paid and nonassessable, free from all liens, charges and preemptive
rights, if any, with respect thereto or to the issuance thereof. The Company
shall at all times reserve and keep available for issuance upon the exercise of
this Warrant such number of authorized but unissued shares of Common Stock as
will be sufficient to permit the exercise in full of this Warrant. The Company
shall ensure that all exercises properly requested by the Holder shall be
effected by the Company.

        9. Replacement of Warrants. Upon receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation of
this Warrant and (in the case of loss, theft or destruction) upon delivery of an
indemnity agreement (with surety if reasonably required) in an amount reasonably
satisfactory to the Company, or (in the case of mutilation) upon surrender and
cancellation of this Warrant, the Company will issue, in lieu thereof, a
replacement Warrant of like tenor.

        10. Transfers, etc.

           (a) The Company will maintain a register containing the names and
addresses of the Registered Holders of this Warrant. Any Registered Holder may
change its, his or her address as shown on the warrant register by written
notice to the Company requesting such change.

           (b) Until any transfer of this Warrant is made in the warrant
register, the Company may treat the Registered Holder of this Warrant as the
absolute owner hereof for all purposes; provided, however, that if and when this
Warrant is properly assigned in blank, the Company may (but shall not be
obligated to) treat the bearer hereof as the absolute owner hereof for all
purposes, notwithstanding any notice to the contrary.

        11. No Rights as Stockholder. Until the exercise of this Warrant, the
Registered Holder of this Warrant shall not have or exercise any rights by
virtue hereof as a stockholder of the Company.

        12. Successors. The rights and obligations of the parties to this
Warrant will inure to the benefit of and be binding upon the parties hereto and
their respective heirs, successors, assigns, pledgees, transferees and
purchasers. Without limiting the foregoing, the registration rights set forth in
this Warrant shall inure to the benefit of the Registered Holder and all the
Registered Holder's successors, heirs, pledgees, assignees, transferees and
purchasers of this Warrant and the Warrant Shares.

        13. Change or Waiver. Any term of this Warrant may be changed or waived
only by an instrument in writing signed by the party against which enforcement
of the change or waiver is sought.

        14. Headings. The headings in this Warrant are for purposes of reference
only and shall not limit or otherwise affect the meaning of any provision of
this Warrant.

        15. Governing Law. This Warrant shall be governed by and construed in
accordance with the laws of the State of New York as such laws are applied to
contracts made and to be fully performed entirely within that state between
residents of that state.

        16. Mailing of Notices, etc. All notices and other communications under
this Warrant (except payment) shall be in writing and shall be sufficiently
given if delivered to the addressees in person, by Federal Express or similar

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receipt delivery, or if mailed, postage prepaid, by certified mail, return
receipt requested, as follows:

                  Registered Holder:

                           To his or her address on page 1 of this Warrant

                  The Company:

                           Isotope Solutions Group, Inc.
                           700 Stewart Avenue
                           Garden City, New York 11530
                           Attn: Shraga David Aranoff, Vice President

                  In either case, with copies to:

                           Davis & Gilbert LLP
                           1740 Broadway
                           New York, New York 10019
                           Attn:  Brad J. Schwartzberg, Esq.

                                    and

                           Feldman & Associates Counselors at Law, P.C.
                           36 West 44th Street, Suite 1201
                           New York, New York 10038
                           Attn:  David N. Feldman, Esq.

or to such other address as any of them, by notice to the others may designate
from time to time. Time shall be counted to, or from, as the case may be, the
delivery in person or by mailing.

                                 ISOTOPE SOLUTIONS GROUP, INC.
                                 (f/k/a EDG Capital, Inc.)

                                 By: _________________________________________
                                      Shraga David Aranoff, Vice President and
                                      Chief Operating Officer

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<PAGE>

                               NOTICE OF EXERCISE

        TO:      Isotope Solutions Group, Inc.
                 700 Stewart Avenue
                 Garden City, New York 11530
                 Attn: Shraga David Aranoff, Vice President

        1.       The undersigned hereby elects to purchase _____ shares of the
Common Stock of Isotope Solutions Group, Inc., pursuant to the terms of the
attached Warrant, and tenders herewith payment of the exercise price of such
shares in full, together with all applicable transfer taxes, if any.

        2.       Please issue a certificate or certificates representing said
shares of the Common Stock in the name of the undersigned or in such other name
as is specified below:

                                     __________________________________________
                                     (Name)

                                     __________________________________________
                                     (Address)

                                     __________________________________________

                                     __________________________________________

                                     __________________________________________
                                     (Taxpayer Identification Number)

[Needs conversion section as per paragraph 1]

[print name of Registered Holder]

By:_______________________________________

Title:____________________________________

Date:_____________________________________EXHIBIT 10.23

                               SECURITY AGREEMENT

        THIS SECURITY AGREEMENT ("Agreement") is made this 26th day of December,
2001, by ISOTOPE SOLUTIONS GROUP, INC. (f/k/a EDG Capital, Inc.), a New York
corporation ("Debtor"), for the benefit of those entities and individuals listed
on the attached Schedule A (collectively referred to herein as "Creditors").

        1. DEFINITIONS OF TERMS USED HEREIN.

              (a) "Collateral" means all of the Debtor's right, title and
interest in patent No. 6,074,626 (as granted by the U.S. Patent and Trademark
Office) covering "Radioactive Cisplatin in the Treatment of Cancer", as assigned
to Isotope Solutions, Inc., a wholly-owned subsidiary of Debtor, from Dr.
Stanley E. Order.

              (b) "Liability" or "liabilities" means all obligations of Debtor
to the Creditors, whether now existing or hereafter arising, under the Notes.

              (c) "Note" or "Notes" means the Convertible Negotiable Promissory
Notes of Debtor to each Creditor of even date herewith in the aggregate
principal amount of One Hundred Thirty Thousand Dollars ($130,000).

              (d) "Proceeds" means whatever is received when Collateral is sold,
exchanged, licensed, leased, collected or otherwise disposed of (whether
permanently, temporarily, exclusively or nonexclusively) and includes the
account arising when the right to payment is earned under a contract.

              (e) "Security Interest" means a lien or other interest in
Collateral which secures payment of a Liability or performance of an obligation.

        2. SECURITY INTEREST

              (a) As security for the payment in full of principal, interest and
performance of the Note and all other Liabilities of Debtor to the Creditors,
Debtor hereby grants to the Creditors a Security Interest in the Collateral and
all proceeds arising therefrom and any and all products of the Collateral.

              (b) Debtor represents that it is the sole lawful owner of the
Collateral attributable to it, free and clear of any liens and encumbrances
which have not been previously disclosed in writing to the Creditors, and has
the right and power to pledge, sell, assign and transfer absolute title thereto
to Creditors and that no financing statement covering the Collateral, other than
the Creditors', has been filed with respect to any Collateral.

              (c) Debtor agrees that the Security Interest shall be a first
priority security interest in the Collateral, senior and prior in payment to all
other indebtedness and obligations of Debtor to third parties.

<PAGE>

        3. USE OF COLLATERAL

        Until the occurrence of an Event of Default (as defined below), Debtor
may use the Collateral in any lawful manner.

        4. INSURANCE

        Omitted.

        5. DEFAULT

        Each of the following shall constitute an Event of Default hereunder:

                (a)     any Event of Default (as defined in the Note) not cured
                        by the end of any applicable cure period;

                (b)     if the Debtor shall or shall attempt to (a) sell,
                        encumber or otherwise dispose of the Collateral or any
                        interest therein, (b) conceal, hire out or let the
                        Collateral, (c) misuse or abuse the Collateral, or (d)
                        use or allow the use of the Collateral in connection
                        with any undertaking prohibited by law;

                (c)     if the Collateral shall be attached, levied upon, seized
                        in any legal proceedings, or held by virtue of any lien
                        or distress;

                (d)     if the Debtor shall fail to pay promptly all taxes and
                        assessments upon the Collateral or the use thereof,
                        except such taxes the amount, applicability or validity
                        of which are being contested in good faith by
                        appropriate proceedings and with respect to which the
                        Company shall have set aside on its books adequate
                        reserves with respect to such taxes as are required by
                        generally accepted accounting principles as in effect;

                (e)     if the Debtor shall breach any of the covenants,
                        agreements or representations contained herein or in the
                        Note; or

                (f)     if there shall occur any loss, theft, damage or
                        destruction of any material item or part of the
                        Collateral for which, in the opinion of Creditors, there
                        is insufficient insurance coverage.

        Upon the occurrence of any one or more of the foregoing Events of
Default, in addition to any rights which may exist under and pursuant to the
Note, (1) all Liabilities shall become immediately due and payable, and (2) the
Debtor agrees upon demand of Creditors to deliver the Collateral to or for the
benefit of the Creditors, or Creditors may, with or without legal process, and
with or without previous notice or demand for performance, enter any premises

                                       2

<PAGE>

where the Collateral may be, and take possession of the same, together with
anything therein; and the Creditors may make disposition of the Collateral
subject to any and all applicable provisions of law. If the Collateral is sold
at public sale, the Creditors may purchase the Collateral at such sale. The
Creditors, provided a statutory notice of default has been sent, may retain from
the proceeds of such sale all reasonable costs incurred in said taking and sale
and also, all sums then owing by the Debtor, and any amounts in excess of such
sums resulting from any such sale shall be paid to the Debtor.

        6. GENERAL AGREEMENTS.

              (a) Debtor agrees to allow the Creditors, through the
representative of Creditors, at all reasonable times, to examine or inspect any
of the Collateral and to examine, inspect and make extracts from the books and
records of Debtor relating to the Collateral.

              (b) Debtor promptly will pay when due all taxes and assessments
upon the Collateral or for its use or operation or upon the Proceeds thereof or
upon this Agreement or upon any instrument or instruments evidencing the
Liabilities, except such taxes the amount, applicability or validity of which
are being contested in good faith by appropriate proceedings and with respect to
which the Company shall have set aside on its books adequate reserves with
respect to such taxes as are required by GAAP.

              (c) At their option, the Creditors may discharge taxes, liens or
Security Interests or other encumbrances at any time levied or placed on the
Collateral, and obtain insurance and pay for the maintenance and preservation of
the Collateral, and the Debtor agrees to reimburse the Creditors on demand for
any payment made or any expense incurred by the Creditors pursuant to the
foregoing authorization, including counsel fees and disbursements incurred or
expended by the Creditors in connection with this Agreement.

              (d) Debtor hereby authorizes the Creditors to file financing
statements under the Uniform Commercial Code and any amendments thereto or
extensions thereof without the signature of Debtor. Such authorization is
limited to the Security Interest granted by this Agreement.

              (e) The Creditors shall not be deemed to have waived any of their
rights hereunder or under any other agreement, instrument or paper signed by the
Debtor unless such waiver is in writing and signed by a majority of the
Creditors. No delay or omission on the part of the Creditors in exercising any
right shall operate as a waiver thereof or of any other right. A waiver upon any
one occasion shall not be construed as a bar or a waiver of any right or remedy
on any future occasion. All of the rights and remedies of the Creditors, whether
evidenced hereby or by the Note or other instrument or paper, shall be
cumulative and may be exercised singly or concurrently.

                                       3

<PAGE>

        7. EXECUTION BY CREDITOR.

        This Agreement shall take effect immediately upon execution by the
Debtor, and the execution hereof by the Creditors shall not be required as a
condition to the effectiveness of this Agreement. The provision for execution of
this Agreement by the Creditors is only for purposes of filing this Agreement as
a Security Agreement under the Uniform Commercial Code, if execution hereof by
the Creditors is required for such purposes.

        8. CONTINUING SECURITY INTEREST; ASSIGNMENT.

        This Security Agreement shall create a continuing security interest in
the Collateral and shall remain in full force and effect until the payment in
full of the Liabilities and such time as the Notes shall not remain outstanding.
If at any time or times, by sale, assignment, negotiation, pledge or otherwise,
Creditors shall transfer any Liability or Liabilities, which Creditors shall at
all times be free to do, such transfer shall carry with it Creditor's rights,
powers and remedies under this Agreement with respect to the Liability
transferred, and the transferee shall become vested with such rights and
remedies whether or not they are specifically referred to in the transfer,
unless, and then only to the extent, that the terms of such transfer otherwise
provide. If and to the extent Creditors retain any other Liability or
Liabilities, Creditors shall continue to have the rights, powers and remedies
herein set forth with respect thereto.

        9. MISCELLANEOUS.

        This Agreement shall be binding upon Debtor, its successors and assigns,
and shall inure to the benefit of the Creditors and their heirs, executors,
beneficiaries, successors and assigns. Debtor shall not assign this Agreement
except with the express written consent of Creditors. No amendment or waiver of
any provision of this Agreement, nor consent to any departure by Debtor
herefrom, shall in any event be effective unless the same shall be in writing
and signed by the Creditors, and then such waiver or consent shall be effective
only in the specific instance and for the specific purpose for which given. If
one or more provisions of this Agreement are held to be prohibited, invalid or
unenforceable under applicable law, such provision will be effective to the
fullest extent possible excluding the terms affected by such prohibition,
invalidity or unenforceability, without invalidating the remainder of such
provision or the remaining provisions of this Agreement. If the prohibition,
invalidity or unenforceability referred to in the prior sentence requires such
provision to be excluded from this Agreement in its entirety, the balance of
this Agreement will be interpreted as if such provision were so excluded and
will be enforceable in accordance with its terms. This Agreement and the rights
and obligations of the Creditors and Debtor hereunder shall be governed by and
construed in accordance with the substantive laws of the State of New York,
except only to the extent that the validity or perfection of the Security
Interest hereunder, or remedies hereunder, in respect of any particular
Collateral are governed by the laws of a jurisdiction other than the State of
New York. This Agreement shall terminate at such time as the Note has been fully
paid or converted in accordance with its terms.

                                       4
<PAGE>

        IN WITNESS WHEREOF, the undersigned Debtor has executed this Security
Agreement as of the date first above written.

                     ISOTOPE SOLUTIONS GROUP, INC. (f/k/a EDG Capital, Inc.)

                     By:
                         ------------------------------------------------
                         Shraga David Aranoff, Vice President
                         and Chief Operating Officer

                                       5

<PAGE>

                                   SCHEDULE A

Richard Friedman
Lawrence Kaplan
Eileen Kaplan
Jeffrey Markowitz
Jack Schwartzberg

                                       6

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