Document:

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AMENDMENT TO ACQUISITION AGREEMENT

         The parties hereby amend that certain Acquisition Agreement by and
between Bioshield Technologies, Inc., a Georgia corporation ("BioShield") and
Arrow Magnolia International, Inc., a Texas corporation (the "Company") dated
July 7, 2000 (the "Agreement"), as follows:

         1.       Notwithstanding anything contained in the Agreement to the
                  contrary, the parties hereby agree that BioShield shall pay,
                  in lieu of $4.41 in cash and $0.59 in the common stock of
                  BioShield, $5.00 in cash for up to a maximum of 2,761,281 of
                  the 3,248,566 shares of the common stock of the Company
                  issued and outstanding.

         2.       All references in the Agreement reciting BioShield's offer as
                  described in the Agreement shall hereby be amended to recite
                  only a $5.00 cash offer and any and all references to the
                  tender of shares common stock of BioShield as consideration
                  for the Agreement, including but not limited to methods for
                  the calculation of the number of said shares to be delivered,
                  are hereby deleted, such that the shareholders of the Company
                  shall be entitled to receive $5.00 in cash for each share of
                  the Company's common stock properly tendered and accepted or
                  payment.

         3.       Bioshield shall be under no obligation to prepare a Form S-4
                  to be filed with the Securities and Exchange Commission as
                  contemplated by Section 1.1(c) of the Agreement, but instead
                  shall file only a Tender Offer Statement under Section 14(d)
                  of the Securities Act of 1934. The registration effective
                  condition in the Agreement is also deleted.

         4.       All other provisions of the Agreement, to the extent not
                  expressly affected by the modification to the form of
                  consideration paid to the shareholders of the Company, shall
                  remain in full force and effect.

         This ___ day of September, 2000.

         THE COMPANY                                 BIOSHIELD
                                                     TECHNOLOGIES, INC.

         ---------------------------                 --------------------------
         By:                                         By:
            ------------------------                    -----------------------
         Its:                                        Its:
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                 DIP FINANCING, ESCROW AND SETTLEMENT AGREEMENT

         This DIP Financing Escrow and Settlement Agreement is made as of
September 22, 2000, by and among BioShield Technologies, Inc., a Georgia
corporation, and its wholly owned subsidiary AHT Acquisition Corp., a Delaware
corporation (collectively "Lenders"); AHT Corporation, a Delaware corporation,
and its wholly owned subsidiaries, Advanced Health Technologies Corporation, a
Delaware Corporation, Advanced Health Bukstel & Halfpenny Corporation, a
Delaware Corporation and Advanced Health Management Corp., a Delaware
Corporation, (collectively "Debtors"); and Tracy L. Klestadt & Associates
("Escrow Agent").

                  WHEREAS, the Debtors plan to file voluntary petitions for
relief ("Bankruptcy Petitions") under Chapter 11 of title 11 of the United
States Code (the "Bankruptcy Code") in the Bankruptcy Court for the Southern
District of New York, White Plains Division ("Bankruptcy Court");

                  WHEREAS, pursuant to Sections 1107 and 1108 of the Bankruptcy
Code, the Debtors plan to continue in the operation of their businesses and the
management of their assets and properties as debtors in possession;

                  WHEREAS, certain claims have been asserted and are currently
pending between the Lenders and AHT Corporation in the civil action styled AHT
Corporation, plaintiff, v. BioShield Technologies, Inc., AHT Acquisition Corp.,
et al, defendants, in the Superior Court of Fulton County Georgia, Case No.
2000CV27812 (Pending Litigation");

                  WHEREAS, the Debtors have determined that the sale of the
Debtors' business as a going concern is the best way to maximize the value of
the Debtors' assets and maximize the distribution to the Debtors' creditor and
shareholder constituency;

                  WHEREAS, the Debtors anticipates that they will operate at a
loss from the Filing Date until such time as the sale of substantially all of
the Debtors' assets, subject to court order on notice and a hearing, is
consummated;

                  WHEREAS, the Debtors will be unable to remain current on
their post-petition obligations and lack the revenues and financial resources
to sustain their operations and maintain the value of their businesses as going
concerns until such time as the Debtors can effectuate a sale of substantially
all of their assets;

                  WHEREAS the Debtors have agreed to a full and final
compromise, settlement and release of all claims asserted in the Pending
Litigation (the "Settlement") in consideration of the Lenders' agreement,
subject to certain terms and conditions including Bankruptcy Court approval,
(i) to purchase substantially all of the assets of the Debtors pursuant to an
Asset Purchase Agreement between Lenders and Debtors of even date herewith
("Asset Purchase Agreement") in a sale under Section 363 of the Bankruptcy Code
for an aggregate purchase price of approximately $15,050,000 and (ii) to
provide secured debtor-in-possession financing to the Debtors of up to
$1,500,000 on the terms and conditions set forth in this Agreement;

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                  NOW, THEREFORE, in consideration of the mutual covenants and
undertakings and the terms and conditions contained herein, the parties hereto
agree as follows:

         1.       (A) General Definitions. When used in this Agreement, the
following terms shall have the following meanings:

         "Accounts" shall mean all accounts, including accounts receivable,
notes receivable, and other rights to the payment of money, now or hereafter
existing, now owned or hereafter acquired by the Sellers.

         "Agreement" shall mean this DIP Financing Agreement made as of
September 21, 2000, by and between Lenders and the Debtors.

         "Asset Purchase Agreement" shall mean that certain Asset Purchase
Agreement between the Lenders and the Debtors as of September 21, 2000 pursuant
to which the Lenders have agreed, subject to certain terms and conditions
including Bankruptcy Court approval, to purchase substantially all of the
assets of the Debtors in a sale under Section 363 of the Bankruptcy Code for an
aggregate purchase price of approximately $15,050,000.

         "Bankruptcy Code" shall mean Title 11 of the United States Code.

         "Bankruptcy Court" shall mean the United States Bankruptcy Court for
the Southern District of New York, White Plains Division, which will preside
over Debtors' Chapter 11 case.

         "Bankruptcy Petitions" shall mean the voluntary petitions filed by the
Debtors under Chapter 11 of Title 11 of the Bankruptcy Code.

         "Cash Needs Certificate" shall mean the Debtors' Cash Needs
Certificate furnished to the Lenders and the Escrow Agent on a bi-monthly
basis, such Certificates being subject to Lenders' reasonable approval to the
extent any of them are not substantially in accord with the Cash Forecast
Schedule annexed to the Sauerhoff affidavit. The initial Cash Needs Certificate
is annexed hereto as Exhibit "A."

         "Collateral" shall have the meaning set forth in Section 4 a. below.

         "Committee" shall mean any official committee of unsecured creditors
appointed by the Office of the United States Trustee pursuant to Section 1102
of the Bankruptcy Code.

         "Contract Rate" shall mean six percent (6 %) per annum.

         "Copyrights" shall mean any of the following now owned or hereinafter
acquired by any of the Debtors: (i) all copyrights, whether registered or
unregistered, held pursuant to the laws of the United States, any State thereof
or any other country, (ii) registrations, applications and recordings

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in the United States Copyright Office or any similar office or agency of the
United States, (iii)any state thereof or any other country, any continuances,
renewals or extensions thereof, and (iv) any registrations to be issued in any
pending applications.

         "Debtors" shall mean AHT Corporation and its wholly owned
subsidiaries, Advanced Health Technologies Corporation, Advanced Health Bukstel
& Halfpenny Corporation, and Advanced
Health Management Corp.

         "Default Rate" shall mean the prime rate plus five percent (5%) per
annum. Under this agreement, the prime rate shall be established as the rate
published by The Chase Manhattan Bank, N.A. for its prime borrowers at or about
the time this DIP agreement is executed, and shall be adjusted on the first day
of each month thereafter.

         "DIP Financing Order" shall mean an order of the Bankruptcy Court, in
a form approved by the Lenders, which approves the DIP Financing on an interim
or permanent basis.

         "DIP Financing" shall mean the secured cash advances made by or on
behalf of Lenders to Debtors pursuant to this Agreement.

         "Due Date" shall mean the earlier of the (i) Expiration Date, (ii) the
date of consummation of the Section 363 Sale to the Lenders or (iii) the date
of Consummation of a Plan of reorganization of the Debtors, or (iv) the date of
the occurrence of an Event of Default hereunder.

         "Escrow Agent" shall mean the law firm of Tracy L. Klestadt &
Associates.

         "Escrow Funds" shall mean the $1,500,000 deposited by Lenders with the
Escrow Agent.

         "Event of Default" shall mean the occurrence of any of the events set
forth in paragraph 11 of this Agreement.

         "Excluded Property" shall mean the physician practice management
subsidiaries of Advanced Health Management Corp. and that portion of Debtors'
personal property, if any, which, if included would violate or be prohibited by
applicable law.

         "Expiration Date" shall mean the latter of the date which is 90 days
after the Term Commencement Date or such later date as is mutually agreed by
the Lenders and the Debtors.

         "Filing Date" shall mean the date of filing of the Debtors' Bankruptcy
Petitions.

         "Intellectual Property" shall mean (i) all Copyrights, Patents and
Trademarks, (ii) all inventions, software, processes, protocols, procedures,
concepts and technology of the Debtors (whether patentable or unpatentable and
whether or not reduced to practice), and all documentation, code, data,
passwords, user ID's, improvements, modifications, enhancements, derivatives,
(iii) all

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research and development, know-how, formulas, compositions, processes,
procedures, protocols, techniques, technical data, designs, drawings,
specifications, (iv) all licenses for the use by any of the Debtors of computer
software, processes, protocols, procedures, concepts, technology, (v) all other
proprietary knowledge, information and rights, and (vi) all copies and tangible
embodiments thereof (in whatever form or medium) and the term Intellectual
Property shall further include without limitation all of the items attached
hereto as Exhibit A.

         "Indebtedness" shall mean the total unpaid amount, from time to time,
of all advances, accrued interest and other charges with respect to the DIP
Financing.

         "Patents" shall mean all of the following in which any of the Debtors
now hold or hereafter acquire any interest: (i) letters patent of the United
States or any other Country, all registrations and recordings thereof, and all
applications for letters patent of the United States or any other country and
all rights corresponding thereto, including, without limitation, registrations,
recordings and applications in the United States Patent and Trademark Office or
any similar office or agency or the United States or any other country and (b)
all reissues, divisions, continuations, renewals, continuations-in-part or
extensions thereof.

         "Pending Litigation" the civil action styled AHT Corporation,
plaintiff, v. BioShield Technologies, Inc., AHT Acquisition Corp., et al,
defendants, in the Superior Court of Fulton County Georgia, Case No.
2000CV27812.

         "Person" shall mean an individual, partnership, corporation, trust or
unincorporated organization, or a government or agency or political subdivision
thereof.

         "Settlement" shall mean the full and final compromise, settlement and
release of (i) all claims asserted by AHT Corporation in the Pending
Litigation, and (ii) all counterclaims asserted by the Lenders in the Pending
Litigation.

         "Term" shall mean the period from the Term Commencement Date until the
Due Date.

         "Term Commencement Date" shall mean the date on which an initial DIP
Financing Order is entered by the Bankruptcy Court.

         "Trademarks" shall mean any of the following now owned or hereinafter
acquired by any of the Debtors: (i) any trademarks, trade names, corporate
names, business names, trade styles, service marks, logos, other source or
business identifiers, prints and labels on which any of the foregoing have
appeared or appear, designs and general intangibles of like nature, now
existing or hereinafter adopted or acquired, all registrations and recordings
thereof, and any applications in connection therewith, including, without
limitation, registrations, recordings and applications in the United States
Patent and Trademark Office or any similar office or agency of the United
States, any State thereof or any other country or political subdivision thereof
and (ii) any reissues, extensions or renewals thereof.

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         "UCC" shall mean the Uniform Commercial Code, as adopted in the State
of New York as in effect from time to time.

         (B)      Other Terms. All other terms used in this Agreement, and
defined in the UCC, shall have the meaning given therein unless otherwise
defined herein, including the terms "Chattel Paper", "Documents", "Equipment",
"Fixtures", "General Intangibles", "Instruments", "Inventory", and "Proceeds".

         2.       DIP Financing.

         2.01.    Lenders either will or have delivered $1,500,000 to the Escrow
Agent to fund the DIP Financing. Escrow Agent agrees to hold such funds in an
interest bearing trust account and to disburse such funds as provided herein.

         2.02.    Escrow Agent shall advance to the Debtors up to $1,500,000 in
 accordance with the Debtors' Cash Needs Certificates, subject to the following
 limitations and conditions:

                  (a)      Advances shall be made no more frequently than twice
a month.

                  (b)      Advances shall be made in amounts no greater than the
Debtors' projected cash needs for the period of the advance and, in any case,
shall not exceed $750,000 during any one month period.

                  (c)      As a condition to each DIP Financing advance other
than the first advance, there must be on file with the Bankruptcy Court a Plan
of Reorganization and a Motion for Approval of a Section 363 Sale of Assets for
which approval is being diligently pursued by the Debtors and which, as amended
from time to time, (i) comply in form and substance with the requirements of
the Asset Purchase Agreement, and (ii) have not been disapproved or denied.

                  (d)      The first $375,000 in funding shall be advanced to
the Debtors by the Escrow Agent provided that (i) such advance is authorized by
an emergency or interim DIP Financing Order substantially in the form attached
hereto as Exhibit B which has been entered by the Bankruptcy Court, (ii) the
DIP Financing Order remains in full force and effect, not having been vacated,
stayed, modified, appealed, reversed or otherwise affected, and (iii) no Event
of Default has occurred under this Agreement.

                  (e)      The second $375,000 in funding shall be advanced to
the Debtors by the Escrow Agent provided the conditions of subsections (a),
(b), and (c) of this Section 2.02 are met and further provided that (i) a final
hearing on the authorization of DIP financing and the approval of the
Settlement has been scheduled, (ii) such advance is authorized by a DIP
Financing Order substantially in the form attached hereto as Exhibit C which
has been entered by the Bankruptcy Court, (iii) the DIP Financing Order remains
in full force and effect, not having been vacated, stayed, modified,

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appealed, reversed or otherwise affected, and (iv) no Event of Default has
occurred under this Agreement.

                  (f)      The remaining DIP Financing shall be advanced to the
Debtors by the Escrow Agent provided the conditions of subsections (a), (b),
and (c) of this Section 2.02 are met and further provided that (i) a final DIP
Financing Order has been entered substantially in the form attached hereto as
Exhibit D, and (ii) an order of the Bankruptcy Court, in a form acceptable to
Lenders in their reasonable discretion, has been entered approving the
Settlement on the terms agreed to herein, (iii) such orders remain in full
force and effect, neither of them having been vacated, stayed, modified,
appealed, reversed or otherwise affected, and (iv) no Event of Default has
occurred under this Agreement.

         2.03.    The proceeds of the DIP Financing shall be used by the Debtors
for the payment of necessary operating expenses incurred by the Debtors in the
ordinary course of their business and required for the continuation of the
Debtors' business, as set forth in detail in the Cash Needs Certificate.

         2.04.    Debtors shall repay the Indebtedness, in full on the Due Date.

         2.05     Debtors shall provide to Lenders, on a weekly basis, (i) an
accounting of all payments, disbursements or other uses of funds with details
of the specific expenditures, (ii) an accounting of all revenues and receipts,
and an accounting of all cash and cash equivalents on hand.

         2.06     Lenders and Debtor agree to reasonably cooperate in obtaining
Bankruptcy Court approval of this Agreement.

         3.       Interest.

         3.01.    Debtors shall pay interest on the unpaid principal balance of
the Indebtedness, for each day it is outstanding. Interest shall accrue at the
Contract Rate except that, upon the occurrence and during the continuance of an
Event of Default, interest shall accrue and be payable at the Default Rate.

         3.02.    Interest shall be (i) computed on the basis of actual days
 elapsed over a 360-day year, (ii) calculated by Lenders on a daily basis and
 (iii) billed and payable on the Due date.

         4.       Security Interest.

         4.01.    As security for the prompt and complete payment when due
(whether at stated maturity, by acceleration or otherwise) of the Indebtedness
and in order to cause the Lenders to provide the DIP Financing, the Debtors
hereby grant, assign, convey, mortgage, pledge, hypothecate and transfer to
Lenders a security interest in all of the Debtors' right title and interest in,
to and under all of the assets and businesses of the Debtor, excepting the
Excluded Property whether now owned or hereafter acquired (all of which is
collectively called the "Collateral"): (a) all Accounts of Debtors,

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(b) all Chattel Paper of Debtors, (c) all contract rights, proposals,
work in process, or other rights, title or interests of any of the Debtors in
or under any contracts or agreements, whether executory or fully preformed,
including but not limited to all Material Contracts, (d) all Documents of
Debtors, (e) all Equipment of Debtors, (f) all furniture and Fixtures of
Debtors, (g) all General Intangibles of the Debtors including without
limitation, all Copyrights, Patents, Trademarks and Intellectual Property,
whether owned by Debtors or usable by Debtors pursuant to licenses to
Intellectual Property granted to Debtors, (h) all Instruments of Debtors
including without limitation promissory notes, (i) all Inventory of Debtors,
(j) all tax refunds or rights to tax refunds of Debtors, (k) all property of
Debtors held by the Lenders or any other Person, including, without limitation,
all property of every description now or hereafter in the possession or custody
of, or in transit to, Lenders or such other Person for any purpose, including,
without limitation, safekeeping, collection or pledge, for the account of
Debtors, or as to which Debtors may have any right or power, (l) all claims,
causes of action, choses-in-action, prepayments, refunds, rights of recovery,
rights of set off or recoupment, recoveries from litigation, arbitration,
mediation or adversarial proceedings, including, without limitation, any
litigation in bankruptcy (excluding any action brought under sections 544, 547,
548, 549, or 550 of the Bankruptcy Code), (m) all other goods and personal
property of Debtors whether tangible or intangible and whether now or
hereafter, owned, leased, consigned by or to, or acquired by, Debtors wherever
located, (n) all of the Debtors books, records, ledgers, files, documents,
correspondence, customer lists, prospective customer lists, supplier lists,
prospective supplier lists, e-mail lists, telefax lists, mailing lists,
creative materials, advertising and promotional materials, studies, reports,
and other printed or written materials, including, without limitation, all
tapes, cards, discs, diskettes, runs and other papers, documents and computer
storage media in the possession or control of the Debtors, or any computer
service bureau, wherever located and whether the same are owned by the Debtors
on the date hereof or are hereafter acquired or created by the Debtors, (o) any
and all of the Debtors' cash, cash deposits, certificates of deposit, bank
accounts, securities accounts or other depository or holding accounts, security
deposits, prepaid items or cash equivalents, (p) any and all of the Debtors'
telephone numbers, telefax numbers, domain names, web addresses, URL's and
Internet websites, (q) any and all securities of every kind or nature,
including without limitation, shares of stock, options, warrants, partnership
interests, membership interests, investment contracts and the like, (r) all
payments received pursuant to settlements, judgments, compromises, indemnities,
warranties or guaranties, payable by reason of loss or damage or otherwise with
respect to any of the foregoing, and (s) to the extent not otherwise included,
all substitutions, products and Proceeds, including without limitation
insurance proceeds, of each of the foregoing and all accessions to,
substitutions and replacements for, and rents, royalties, dividends,
distributions, and profits of each of the foregoing.

         4.02.    Except for the security interest granted to the Lenders under
this Agreement and the security interest granted by the Debtors to Cybear, Inc.
under that certain Security Agreement dated March 27, 2000, Debtors are the
sole legal owners of each item of the Collateral in which it purports to grant
a security interest hereunder, having good marketable and insurable title
thereto free and clear of any and all liens.

         4.03.    This Agreement creates a legal and valid security interest on
 and in all of the

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Collateral in which the Debtors now have rights and all actions necessary or
desirable to perfect and protect the security interest created herein have been
or will have been duly taken upon the entry of the initial DIP Financing Order.
The DIP Financing Orders shall include a provision for the due and legal
perfection of the security interest granted to the Lenders hereunder upon the
entry of such orders without the necessity of filing Uniform Commercial Code
financing statements or assignments of Patents, Copyrights and Trademarks and
without the necessity of possession of Chattel Paper, Documents, Instruments or
negotiable securities subject only to the rights of third parties possessing
such Chattel Paper, Documents, Instruments or negotiable securities.
Accordingly, Lenders will at all times have a duly perfected security interest
in the Collateral, second in priority only to the lien and security interest of
Cybear, Inc.

         4.04.    Debtors will keep all Collateral in good order and repair and
will not use the Collateral in violation of law or of any policy of insurance
thereon. Lenders or their designee, may inspect the Collateral at any
reasonable time upon reasonable prior notice.

         5.       Escrow Provisions.

         5.01.    The Escrow Agent shall have a duty to hold the Escrow Funds in
an interest bearing trust account, and to disburse the funds as provided in
Sections 2.02 and 5.05 of this Agreement. The Escrow Agent shall have no
responsibility or duty to obtain, collect or enforce any obligations of the
Debtors, nor shall the Escrow Agent have any responsibility or duty to
determine the unpaid balance of the Indebtedness, or the proper application of
any payment on the Indebtedness.

         5.02.    The Escrow Agent shall have no duties except those which are
specifically set forth herein. No waiver, modification, amendment, termination
or rescission of this Agreement shall be effective or binding upon the Escrow
Agent unless the Escrow Agent shall have specifically consented thereto in
writing.

         5.03.    The Debtors and the Lenders acknowledge, understand and agree
that (i) the Escrow Agent has not and will not exercise any independent
professional judgment on behalf of the Lenders or the Debtors in carrying out
its duties under this Agreement; and (ii) notwithstanding its role as the
Escrow Agent hereunder, the Escrow Agent may, in the event of a dispute between
the Debtors and the Lenders, act as counsel for and represent the Debtors in
any dispute or litigation, provided, however, that in the event of such
dispute, no funds shall be released by the Escrow Agent without an order of the
Bankruptcy Court.

         5.04.    The Escrow Agent shall have no liability or responsibility to
the Borrower or the Lender for any losses, claims, damages, liabilities, costs
or expenses provided that such losses are not the result of the Escrow Agent's
own negligence or willful misconduct.

         5.05.    Any Escrow Funds remaining with the Escrow Agent on the Due
Date shall be promptly disbursed to Lenders. In the event the Debtors dispute
the occurrence of the Due Date the Escrow Agent may either hold the Escrow
Funds until a final judgment of a court of competent

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jurisdiction is entered directing the Escrow Agent as to the proper disposition
of the Escrow Funds or the Escrow Agent may file a declaratory judgment action
or an interpleader action against the Lender and the Debtors.

         6.       Settlement.

         The Debtors and the Lenders agree to a full and final Settlement of
the Pending Litigation, subject only to the performance by the Lenders of their
obligations under this Agreement and the Asset Purchase Agreement. Upon the
full performance of such obligations of the Lenders the settlement shall be
effectuated by the (i) immediate filing of a dismissal with full prejudice of
all claims, counterclaims and cross claims against all parties in the Pending
Litigation, (ii) the execution of a release by the Debtors in favor of the
Lenders and the individual defendants in the Pending Litigation and their
respective officers, directors, shareholders, employees (both present and
past), agents, attorneys, heirs, and personal representatives from all claims,
demands, indebtedness, obligations, liabilities, expenses, costs and causes of
action of every kind and nature, whether known or unknown, arising at any time
through and until the execution and delivery of the release and whether then or
thereafter discoverable, (iii) the execution of a release by the Lenders and
the individual defendants in the Pending Litigation in favor of the Debtors and
their respective officers, directors, shareholders, employees (both present and
past), agents, representatives and attorneys from all claims, demands,
indebtedness, obligations, liabilities, expenses, costs and causes of action of
every kind and nature, whether known or unknown, arising at any time through
and until the execution and delivery of the release and whether then or
thereafter discoverable and (iv) the provision of third party releases from all
equity security holders of the Debtors in favor of all parties to the Pending
Litigation upon the confirmation of the Debtors' Plan of Reorganization. The
Lenders shall be deemed to have performed all of their obligations under the
Asset Purchase Agreement upon the consummation of the transactions contemplated
by the Asset Purchase Agreement or the termination of that agreement as
provided therein. The Lenders shall have performed all of their obligations
under this Agreement upon their deposit of $1,500,000 with the Escrow Agent.

         7.       Representations, Warranties and Covenants. Debtors represent
and warrant and covenant that:

         7.01.    Each of the Debtors is a corporation duly organized and
validly existing under the laws of the State of Delaware and duly qualified and
in good standing in every other state or jurisdiction in which the nature of
Debtors' business requires such qualification, except as the foregoing
representation may be affected by the existence of judgments against the
Debtors.

         7.02.    The execution, delivery and performance of this Agreement (i)
has been duly authorized, (ii) is not in contravention of Debtors' certificate
of incorporation, by-laws or of any indenture, agreement or undertaking to
which Debtors is a party or by which Debtors is bound and (iii) is within
Debtors' corporate powers;

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         7.03.    This Agreement has been duly and legally executed and
delivered by each of the Debtors and is a legal, valid and binding obligation
of each of the Debtors, enforceable in accordance with its terms.

         7.04.    Each of the Debtors keeps, and will continue to keep, all of
its books and records concerning the Inventory at Debtors' executive offices
located at the address set forth in the introductory paragraph of this
Agreement and will not move such books and records without giving Lenders at
least fifteen (15) days prior written notice.

         7.05.    All balance sheets and income statements which have been
delivered to Lenders fairly, accurately and properly state Debtors' financial
condition, and there has been no material adverse change in Debtors' financial
condition as reflected in such statements since the date thereof and such
statements do not fail to disclose any fact or facts which might materially and
adversely affect Debtors' financial condition.

         7.06.    The Debtors will not create, incur, assume or accrue any debts
or obligations (exclusive of trade debt and other obligations incurred in the
ordinary course of the Debtors businesses) whether secured or unsecured other
than the Indebtedness to Lenders contemplated by this Agreement and fees and
expenses of administering the Debtors' bankruptcy estates.

         7.07.    At Debtors' own cost and expense in amounts and with carriers
acceptable to Lenders, Debtors' shall (a) keep all of their insurable interests
properties insured against the hazards of fire, flood, sprinkler leakage, those
hazards covered by extended coverage insurance and such other hazards, and for
such amounts, as is customary in the case of companies engaged in businesses
similar to Debtors' including, without limitation, business interruption
insurance; (b) maintain public and product liability insurance against claims
for personal injury, death or property damage suffered by others; (c) maintain
all such workmen's compensation or similar insurance as may be required under
the laws of the State of New York; and (d) furnish Lenders with copies of all
policies and evidence of the maintenance of such policies, as of the
commencement of this DIP Financing Agreement.

         7.08.    The Debtors' Cash Needs Certificates will be prepared in good
faith and will reflect the actual cash needs of the Debtors fairly and
accurately. In addition, the Debtors' weekly accountings of (i) payments,
disbursements or other uses of funds, (ii) of revenues and receipts, and (iii)
an accounting of all cash and cash equivalents on hand will be prepared in good
faith and will fairly and accurately disclose the subject of the accountings.

         7.09.    Except as expressly provided in Section 14 of this Agreement
and Section 14 of the Asset Purchase Agreement, none of the Debtors will file
or permit the filing of any other adversarial proceedings of any nature against
the defendants in the Pending Litigation or against persons in privity with
said defendants unless or until the Settlement is disapproved by the Bankruptcy
Court or abandoned by mutual agreement of the Lenders and the Debtors.

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         8.       Events of Default. The occurrence of any of the following
shall constitute an Event of Default under this Agreement:

         8.01.    Any breach by Debtors of this Agreement or of the Asset
Purchase Agreement which has not been cured within five (5) business days after
notice is sent by Lenders to Debtors;

         8.02.    Any representation, warranty or statement made by Debtors in
this Agreement, or any accounting certificate, statement or document delivered
pursuant to the terms hereof, or in connection with the transactions
contemplated by this Agreement should at any time be false or misleading in any
material respect;

         8.03.    Any lien created hereunder for any reason ceases to be, or is
 not, a valid and perfected lien having a second (or higher) priority;

         8.04.    Debtors directly or indirectly sell, assign, transfer, convey,
or suffer or permit to occur any sale, assignment, transfer or conveyance of
any assets of Debtors or any interest therein, except as permitted herein;

         8.05.    The Asset Purchase Agreement has been Terminated;

         8.06.    The appointment of a Trustee pursuant to section 1104 of the
 Bankruptcy Code, or Examiner with powers similar to those of a Trustee for
 Debtors, or for the property of the estate of
Debtors;

         8.07.    The conversion of Debtors' Chapter 11 case to a case under
 Chapter 7 of the Bankruptcy Code, or the dismissal of Debtors' Chapter 11
 case;

         8.08.    The entry of any order modifying, reversing, revoking,
staying, rescinding, vacating or amending the DIP Financing Order without the
express prior written consent of Lenders (and no such consent shall be implied
from any other action, inaction or acquiescence by Lenders); or

         8.09.    The filing of a plan of reorganization to which Lenders have
not consented or, alternatively, which does not provide for the payment in full
of the Indebtedness on confirmation;

         8.10.    Debtors' material misuse or misapplication of the proceeds of
the DIP Financing.

         9.       Remedies. Upon the occurrence of an Event of Default pursuant
to Section 10 hereof, all Indebtedness shall be immediately due and payable and
Lender shall be granted a Chapter 11 administrative, secured claim against the
Debtors' bankruptcy estate pursuant to Sections 364(c) and 503(b) of the
Bankruptcy Code equal to the amount of the Indebtedness. Lenders' secured
administrative priority hereunder shall be subordinate only to the secured
claim of Cybear, Inc. and shall have priority over all other claims of every
kind, nature, priority or status.

                                      -11-

<PAGE>   12

         10.      Waiver; Cumulative Remedies. Lenders' failure to exercise any
right, remedy or option under this Agreement or any supplement hereto or any
other agreement between Debtors and Lenders or delay by Lenders in exercising
the same, will not operate as a waiver; no waiver by Lenders will be effective
unless it is in writing and then only to the extent specifically stated.

         11.      Notices. Any notice or request hereunder may be given to
Debtors or Lenders at the respective addresses set forth below or as may
hereafter be specified in a notice designated as a change of address under this
paragraph. Any notice or request hereunder shall be given by registered or
certified mail, return receipt requested, by overnight mail or by hand
delivery. Notices and requests shall be deemed to have been given when
delivered or when delivery is refused (delivery shall be deemed refused if not
accepted within three days after notice is given that delivery was attempted).
Notices to any party to this Agreement shall be given to all parties hereto.

Notices shall be provided as follows:

To Debtors:                                 AHT Corporation
                                            555 White Plains Rd.
                                            5th floor
                                            Tarrytown, NY 10591
                                            Attention: General Counsel
                                            Tel: 914-524-4206
                                            Fax: 914 524-4704

With a copy to:                             Tracy L. Klestadt & Associates
                                            405 Lexington Avenue, 42nd Floor
                                            New York, New York 10174
                                            Attention: Ian R. Winters, Esq.
                                            Telephone: (212) 972-3000
                                            Telecopy: (212) 972-2245

To the Lenders:                             BioShield Technologies, Inc.
                                            5655 Peachtree Parkway
                                            Norcross, Georgia 30093
                                            Telephone: (770) 246-2000
                                            Facsimile:  (770) 368-0784

With a copy to:                             Jerry L. Sims
                                            Sims Moss Kline & Davis LLP
                                            1000 Abernathy Road, N.E.
                                            400 Northpark Town Center

                                      -12-

<PAGE>   13

                                             Suite 310
                                             Atlanta, Georgia 30328
                                             Telephone: (770) 481-7207
                                             Telecopy: (770) 481-7210

To Escrow Agent:                             Tracy L. Klestadt & Associates
                                             405 Lexington Avenue, 42nd Floor
                                             New York, New York 10174
                                             Attention: Ian R. Winters, Esq.
                                             Telephone: (212) 972-3000
                                             Telecopy: (212) 972-2245

         14.      Governing Law and Waiver of Jury Trial. THIS AGREEMENT SHALL
BE GOVERNED BY, AND CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF THE
STATE OF NEW YORK. LENDERS SHALL HAVE THE RIGHTS AND REMEDIES OF A SECURED
PARTY UNDER APPLICABLE LAW, INCLUDING, BUT NOT LIMITED TO, THE UNIFORM
COMMERCIAL CODE. DEBTOR AGREES THAT ALL ACTIONS AND PROCEEDINGS RELATING TO THE
BREACH OR ENFORCEMENT OF THIS AGREEMENT SHALL BE LITIGATED IN THE UNITED STATES
BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF NEW YORK AND ALL PARTIES HERETO
WAIVE THE RIGHT TO A TRIAL BY JURY IN ANY ACTION OR PROCEEDING BETWEEN DEBTORS
AND LENDERS WITH RESPECT THERETO. DEBTORS WAIVE THE RIGHT TO ASSERT ANY OFFSETS
OR COUNTERCLAIMS THEY MAY HAVE IN ANY ACTION OR PROCEEDING INSTITUTED BY
LENDERS CONCERNING THIS AGREEMENT.

         15.      Limitation of Liability. Debtors acknowledge that in order to
assure repayment of the indebtedness hereunder, Lenders may be required to
exercise any and all of Lenders' rights and remedies hereunder; Debtors agrees
that neither Lenders nor any of their agents shall be liable for acts taken or
omissions made in connection herewith except for actual bad faith.

         16.      Entire Understanding. This Agreement contains the entire
understanding between Debtors and Lenders and any promises, representations,
warranties or guarantees not herein contained (whether oral or written) shall
have no force and effect unless in writing, signed by the Debtors' and Lenders'
respective officers. Neither this Agreement nor any portion or provisions
thereof may be changed, modified, amended, waived, supplemented, discharged,
canceled or terminated orally or by any course of dealing, or in any manner
other than by an agreement in writing, signed by the party to be charged.

         17.      Severability. Wherever possible, each provision of this
Agreement shall be interpreted in such manner as to be effective and valid
under applicable law, but if any provision of this Agreement shall be
prohibited by or invalid under applicable law such provision shall be

                                      -13-

<PAGE>   14

ineffective to the extent of such prohibition or invalidity, without
invalidating the remainder of such provision or the remaining provisions
thereof.

         18.      Construction. The parties acknowledge that each party and its
counsel have reviewed this Agreement, and that the rule of construction to the
effect that any ambiguities are to be resolved against the drafting party shall
not be employed in the interpretation of this Agreement or any amendments,
schedules or exhibits thereto.

         19.      Counterparts. This Agreement may be executed in any number of
counterparts, each of which when so executed and delivered shall be an
original, but all of which shall together constitute one and the same
instrument.

         IN WITNESS WHEREOF, this Agreement has been duly executed as of the
day and year first above written.

Bioshield Technologies, Inc.

BY:
   ---------------------------------------
Printed Name:
             -----------------------------
Title:
       -----------------------------------

                  [CORPORATE SEAL]

AHT Acquisition Corp.

BY:
   ---------------------------------------
Printed Name:
             -----------------------------
Title:
       -----------------------------------

                  [CORPORATE SEAL]

AHT Corporation

BY:
   ---------------------------------------
Printed Name:
             -----------------------------
Title:
       -----------------------------------

                                      -14-

<PAGE>   15

                  [CORPORATE SEAL]

Advanced Health Technologies Corporation

BY:
   ---------------------------------------
Printed Name:
             -----------------------------
Title:
       -----------------------------------
                  [CORPORATE SEAL]

Advanced Health Bukstel & Halfpenny Corporation

BY:
   ---------------------------------------
Printed Name:
             -----------------------------
Title:
       -----------------------------------

                  [CORPORATE SEAL]

Advanced Health Management Corp.

BY:
   ---------------------------------------
Printed Name:
             -----------------------------
Title:
       -----------------------------------

                  [CORPORATE SEAL]

Tracy L. Klestadt & Associates
As Escrow Agent

BY:
   ---------------------------------------
Printed Name:
             -----------------------------
Title:
       -----------------------------------

                                      -15-

<PAGE>   16

                                  EXHIBIT "A"

                             CASH NEEDS CERTIFICATE

         The Debtors hereby certify that they require the sum of $378,338.00
for the period September 22, 2000 to, through and including, September 30,
2000, for the expenses set forth in the Sauerhoff Affidavit.

                                      -16-

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