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                                                                   Exhibit 10.72

                             STOCK OPTION AGREEMENT

  THIS  STOCK  OPTION  AGREEMENT  (Agreement")  is  made by and between NATIONAL
MANUFACTURING TECHNOLOGIES, INC., A California corporation, (the "Corporation"),
and  Patrick  W.  Moore,  (the  "Optionee").

  NOW, THEREFORE, in consideration of the mutual benefit to be derived herefrom,
the  Corporation  and  Optionee  agree  as  follows:

  1.  Grant  of  Option.  The  Corporation  hereby grants to Optionee the right,
privilege  and  option ("Option") to purchase 86,000  shares of its common stock
("Stock")  at  $1.4375  per  share,  in the manner and subject to the conditions
provided  hereinafter.

2.     Time  of  Exercise  of Option.   The Option is fully vested. Any exercise
may  be  with respect to any part or all of the shares then exercisable pursuant
to  such  Option,  provided that the minimum number of shares exercisable at any
time  shall  not  be less than 100 shares or the balance of shares for which the
Option  is then exercisable. Such Option must be exercised within 10 years after
the date of the grant. In no event shall the Corporation be required to transfer
fractional  shares  to  Optionee  or those entitled to Optionee's rights herein.

  3.  Method  of  Exercise.   The  option  shall be exercised by Optionee by the
delivery  to  the  Corporation  on  a  form  approved  by  the  Corporation of a
fully-executed Notice of Exercise, specifying the number of shares to be issued,
and  enclosing  a  check  in  payment  of  the  purchase  price  for the shares.

  4.  Restriction  on Exercise and Delivery.   The exercise of this Option shall
be  subject  to  the  condition  that,  if  at  any  time  the Corporation shall
determine,  in  its  sole  and  absolute  discretion,

(a)     the satisfaction of any withholding tax or other withholding liabilities
is  necessary  or  desirable  as  a  condition  of,  or in connection with, such
exercise  or  the  delivery  or  purchase  pursuant  thereto,

(b)     the  listing,  registration,  or qualification of any shares deliverable
upon  such exercise is necessary, under any state or federal law, as a condition
of,  or  in connection with, such exercise or the delivery or purchase of shares
pursuant  thereto,  or

(c)     the  consent  or  approval  of  any  regulatory  body is necessary  as a
condition  of,  or in connection with, such exercise or the delivery or purchase
of  shares  pursuant  thereto,

then,  in  any  such  event,  such  exercise  shall not be effective unless such
withholding,  listing,  registration,  qualification,  consent or approval shall
have  been  effected  or  obtained  free of any conditions not acceptable to the
Corporation.  Optionee  shall execute such documents and take such other actions
as  are  required  by  the  Corporation  to  enable  it to effect or obtain such
withholding,  listing, registration, qualification, consent or approval. Neither
the  Corporation  nor  any  officer or director thereof shall have any liability
with  respect to the non-issuance or failure to sell shares as the result of any
suspensions  of  exercisability  imposed  pursuant  to  this  Section.

  5.  Termination  of  Option.   To  the  extent  not previously exercised, this
Option  shall  terminate upon the first to occur of any of the following events:

(a)     the  dissolution  or  liquidation  of  the  Corporation;

(b)     the  expiration  of  10  years  from the date of the grant of the Option
hereunder;

(c)     the  breach  by  Optionee  of  any  provision  of  this  Agreement.

6.     Nonassignablitity.   This  Option  may  not be sold, pledged, assigned or
transferred  in  any  manner  other  than  by  will  or by the laws of intestate
succession,  and  may  be exercised during the lifetime of Optionee  only by the
Optionee. Any transfer by Optionee of any part of this Option other than by will
or  the laws of intestacy shall void such Option, and the Corporation shall have
no  further  obligation  with  respect  to  the Option. This Option shall not be
pledged  or  hypothecated  in  any  way,  nor  shall  the  Option  be subject to
execution,  attachment  or  similar  process.

  7.  Rights as Shareholder.   Neither Optionee nor his executor, administrator,
heirs  or  legatees, shall be, or have any rights or privileges of a shareholder
of  the  Corporation  in  respect  of shares issuable hereunder unless and until
certificates representing such shares shall have been issued in Optionee's name.

  8.  Restrictive  Legends.   Each  certificate  evidencing  the shares acquired
hereunder,  including any certificate issued to any transferee thereof, shall be
imprinted  with  such  legends  appropriate by the Corporation as may be deemed.

  9.  No Right of Employment.  Neither the grant nor exercise of this option nor
anything  in  this  Agreement  shall  impose  upon  the Corporation or any other
corporation  any  obligation to employ or continue to employ Optionee. The right
of  the Corporation and any other corporation to terminate Optionee shall not be
diminished  or  affected  because  this  Option  has  been  granted to Optionee.

  10.  Mandatory  Arbitration.   In  the  event  of  any  dispute  between  the
Corporation  and Optionee regarding this Agreement, the dispute and any issue as
to  the  arbitrability  of  such dispute, shall be settled to the exclusion of a
court  of  law,  by  arbitration  in  San Diego, California, by a panel of three
arbitrators  (each  party  shall  choose  one  arbitrator and the third shall be
chosen  by  the  two  arbitrators so selected) in accordance with the Commercial
Arbitration  Rules  of  the American Arbitration Association then in effect. The
decision  of  a  majority of the arbitrators shall be final and binding upon the
parties.  All  costs of the arbitration and the fees of the arbitrators shall be
allocated between the parties as determined by a majority of the arbitrators, it
being  the  intention  of  the  parties  that  the  prevailing  party  in such a
proceeding  be  made  whole  with  respect  to  its  expenses.

11.     Definitions.   Capitalized  terms  shall  have  the  meaning  set  forth
herein.

12.  Notices.   Any  notices to be given under the terms of this Agreement shall
be  addressed  to  the  Corporation  in  care  of its Secretary at its principal
office,  and  any  notice  to  be  given  to  Optionee shall be addressed to the
Optionee at the address maintained by the Corporation for such person or at such
other  address  as  the  Optionee  may  specify  in  writing to the Corporation.

  13.  Binding  Effect.   This  Agreement shall be binding upon and inure to the
benefit  of  Optionee,  his  heirs  and  successors, and of the Corporation, its
successors  and  assigns.

14.     Governing  Law.   This  Agreement  shall  be governed by the laws of the
State  of  California.

15.  Descriptive  Headings.   Titles  to  Sections  are  solely  for information
purposes.

  IN  WITNESS  WHEREOF, this Agreement is effective as of, and the date of grant
shall  be,  July  5,  2000.

      NATIONAL  MANUFACTURING  TECHNOLOGIES,  INC.,
 a  California  corporation

      By:   /s/  Jennifer  D.  Brown
               -------------------------------
               Jennifer  D.  Brown,  Secretary

      OPTIONEE

      /s/  Patrick  W.  Moore
          -------------------
           Patrick  W.  Moore<PRE>
                                                                Exhibit 10.24

                                                     April 28, 2000

Mr. Stephen R. Adler
39 Broadacre Drive
Mt. Laurel, NJ  08054

Dear Steve,

         Supplementing the terms of your Employment Agreement with Sybron
Chemicals Inc. (the "Company"), this will confirm that, in the event there shall
be a Change in Control (as hereinafter defined) and thereafter your employment
with the Company terminates Without Cause (as hereinafter defined), you shall be
entitled to the following benefits:

         (a)      If your employment terminates prior to the first anniversary
of the date of the Change in Control, you shall be entitled, in lieu of any
other severance pay, to a lump sum payment, payable within 30 days of the date
your employment terminates, equal to the sum of the following:

                  (i)      two times your base salary in effect on the Change in
Control date; and

                  (ii)     your Target Bonus (as defined in the Company's
Executive Bonus Plan (the "Plan")) for the year in which your termination
occurs, prorated for the number of months of service during that year prior to
the termination; and

                  (iii)    your full Target Bonus for each of the two years
following the year in which your termination occurs.

         (b)      If your employment terminates on or after the first
anniversary of the date of the Change in Control, you shall be entitled, in lieu
of any other severance pay, to a lump sum payment, payable within 30 days of the
date your employment terminates, equal to the sum of the following:

                  (i)      one time your base salary in effect on the Change in
Control date; and

                  (ii)     your Target Bonus for the year in which your
termination occurs, prorated for the number of months of service during that
year prior to the termination; and

                                   -2-

                  (iii)    your full Target Bonus for the year following the
year in which your termination occurs.

         The value of each Target Bonus payable hereunder shall be determined in
accordance with the provisions of Section 7(g)(4) of the Plan, as amended.  The
number of shares of Company Common Stock awarded for partial years shall be
determined by prorating the Closing Price (as defined in the Plan) based on the
Closing Price of the Common Stock on December 31 immediately preceding, and on
December 31 immediately following, a date which is three years prior to the date
your employment terminates.

         Notwithstanding anything herein to the contrary, in the event the
aggregate present value, determined in a manner consistent with applicable
provisions of Section 280G of the Internal Revenue Code of 1986, as amended (the
"Code") and Treasury Regulations promulgated pursuant thereto, of the benefits
and/or payments provided to you under the terms hereof that are treated as
Parachute Payments (as hereinafter defined), along with the aggregate present
value (determined in the same manner) of all other payments and/or benefits
provided to you by the Company that are also treated as Parachute Payments,
exceeds three times your Base Amount (as hereinafter defined), the benefits and/
or payments to which you are otherwise entitled under the terms hereof shall be
reduced to the extent necessary so that the aggregate present value of all
Parachute Payments to which you are entitled hereunder and any other agreement
or arrangement with the Company shall not exceed three times your Base Amount.
The reductions required under this paragraph, if any, shall be applied, to the
extent possible, to all payments and/or benefits to which you are otherwise
entitled under this Agreement in proportion to the Present Value of such
payments and/or benefits, and otherwise in such manner as the Company deems
appropriate at its discretion.  In the event you receive Parachute Payments
having an aggregate present value in excess of three times your Base Amount, you
agree that you are not entitled to retain and shall immediately repay to the
Company, in cash, the excess of the aggregate present value of all payments and/
or benefits which constitute Parachute Payments over three times your Base
Amount.  For purposes of this paragraph the following terms shall have the
meanings set forth below:

         "Parachute Payment" means any payment to you in the nature of
compensation that constitutes a "parachute payment" as that term is defined in
Code Section 280G(b)(2); and

         "Base Amount" means the amount which is determined to be your "base
amount" as that term is defined in Code Section 280G(b)(3).

         Termination of your employment with the Company Without Cause shall
mean (a) termination by the Company without Cause (as defined in your Employment
Agreement with the Company), or (b) termination by you by reason of (i) the
Company's failure to make any of the payments, or provide any of the material
benefits (or their equivalent),

                                    -3-

under the terms of your Employment Agreement with the Company, or (ii) any
material adverse change in your position, the location of your primary
workplace, the scope of your duties and responsibilities, or your compensation
and benefits.

         A "Change of Control" shall be deemed to have occurred upon the
earliest to occur of the following events:  (a) the sale or disposal of
substantially all of the assets of the Company, or (b) the date any entity,
person or group, within the meaning of Section 13(d)(3) or Section 14(d)(2) of
the Securities Exchange Act of 1934, as amended, other than the Company or
Citigroup or any of their subsidiaries, any employee benefit plan (or related
trust) sponsored or maintained by the Company or any of its subsidiaries, or any
other person or group in which the present management of the Company shall have
an aggregate equity interest, on a fully diluted basis, of no less than 15%,
shall have become the beneficial owner of, or shall have obtained voting control
over, more than fifty percent (50%) of the outstanding shares of (i) the
Company's Common Stock, or (ii) the Common Stock of the Company resulting from
the merger or consolidation of the Company with or into any other entity.

         This letter amends and supersedes the letter agreement dated February
13, 1998 covering the same subject matter covered by this letter.

         If the above correctly reflects our understanding, please so indicate
by signing in the space provided below for such purpose.

                                           Sincerely,

                                           Richard M. Klein
                                           President and Chief Executive Officer
AGREED:

/s/ Stephen R. Adler
--------------------
Stephen R. Adler

</PRE>

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