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  <xsd:element abstract="true" id="tech_InstrumentsSalesContingencyMember" name="InstrumentsSalesContingencyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="tech_IntangibleAssetsAmortizationExpense" name="IntangibleAssetsAmortizationExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="tech_LineOfCreditFacilityAdditionalBorrowingCapacity" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="tech_NonqualifiedStockOptionsPlan1998Member" name="NonqualifiedStockOptionsPlan1998Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_NovusHoldingsLLCMember" name="NovusHoldingsLLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_OneCustomerMember" name="OneCustomerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_OperatingLossAndCreditCarryforwardsMember" name="OperatingLossAndCreditCarryforwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_OperatingLossCarryforwardsMember" name="OperatingLossCarryforwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_OtherAsiaMember" name="OtherAsiaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_PerformanceIncentiveProgramsMember" name="PerformanceIncentiveProgramsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_PrimeGeneMember" name="PrimeGeneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_ProfitSharingAndSavingsPlanMember" name="ProfitSharingAndSavingsPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_ProteinPlatformsMember" name="ProteinPlatformsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_ProteinSimpleMember" name="ProteinSimpleMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_ProteinsAndAntibodiesMember" name="ProteinsAndAntibodiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_RandDEuropeMember" name="RandDEuropeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_RestOfWorldMember" name="RestOfWorldMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_SellingGeneralAndAdministrativeExpenseMember" name="SellingGeneralAndAdministrativeExpenseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_SpaceMember" name="SpaceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="tech_SurrenderAndRetirementOfStockToExerciseOptionsShares" name="SurrenderAndRetirementOfStockToExerciseOptionsShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="tech_SurrenderAndRetirementOfStockToExerciseOptionsValue" name="SurrenderAndRetirementOfStockToExerciseOptionsValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_SurrenderOfCommonStockMember" name="SurrenderOfCommonStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_TradeNamesCustomerRelationshipsAndNonCompeteAgreementMember" name="TradeNamesCustomerRelationshipsAndNonCompeteAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="tech_UndesignatedCapitalStockNoParValue" name="UndesignatedCapitalStockNoParValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element id="tech_UndesignatedCapitalStockSharesAuthorized" name="UndesignatedCapitalStockSharesAuthorized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element id="tech_UndesignatedCapitalStockSharesIssued" name="UndesignatedCapitalStockSharesIssued" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element id="tech_UndesignatedCapitalStockSharesOutstanding" name="UndesignatedCapitalStockSharesOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element id="tech_UndesignatedCapitalStockValue" name="UndesignatedCapitalStockValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="tech_UnitedStatesAndCanadaMember" name="UnitedStatesAndCanadaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_UponTheAchievementOfCertainMilestonesMember" name="UponTheAchievementOfCertainMilestonesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_ZephyrusMember" name="ZephyrusMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-10-income-taxes-components-of-provision-for-income-taxes-details" name="statement-statement-note-10-income-taxes-components-of-provision-for-income-taxes-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-10-income-taxes-reconciliation-of-federal-tax-calculated-at-statutory-rate-details" name="statement-statement-note-10-income-taxes-reconciliation-of-federal-tax-calculated-at-statutory-rate-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-10-income-taxes-tables" name="statement-statement-note-10-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-10-income-taxes-temporary-differences-comprising-deferred-taxes-on-consolidated-balance-sheets-details" name="statement-statement-note-10-income-taxes-temporary-differences-comprising-deferred-taxes-on-consolidated-balance-sheets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-11-earnings-per-share-shares-used-in-the-earnings-per-share-computations-details" name="statement-statement-note-11-earnings-per-share-shares-used-in-the-earnings-per-share-computations-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-11-earnings-per-share-tables" name="statement-statement-note-11-earnings-per-share-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-12-segment-information-financial-information-relating-to-geographic-areas-details" name="statement-statement-note-12-segment-information-financial-information-relating-to-geographic-areas-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-12-segment-information-financial-information-relating-to-operating-segments-details" name="statement-statement-note-12-segment-information-financial-information-relating-to-operating-segments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-12-segment-information-tables" name="statement-statement-note-12-segment-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-14-accumulated-other-comprehensive-income-tables" name="statement-statement-note-14-accumulated-other-comprehensive-income-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-14-changes-in-accumulated-other-comprehensive-income-loss-net-of-tax-details" name="statement-statement-note-14-changes-in-accumulated-other-comprehensive-income-loss-net-of-tax-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-2-acquisitions-preliminary-estimated-fair-values-of-assets-acquired-and-liabilities-assumed-pending-final-valuation-of-intangible-assets-details" name="statement-statement-note-2-acquisitions-preliminary-estimated-fair-values-of-assets-acquired-and-liabilities-assumed-pending-final-valuation-of-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-2-acquisitions-tables" name="statement-statement-note-2-acquisitions-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-3-availableforsale-amortized-cost-and-market-value-of-availableforsale-securities-by-major-security-type-details" name="statement-statement-note-3-availableforsale-amortized-cost-and-market-value-of-availableforsale-securities-by-major-security-type-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-3-availableforsale-investments-tables" name="statement-statement-note-3-availableforsale-investments-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-4-inventories-inventories-details" name="statement-statement-note-4-inventories-inventories-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-4-inventories-tables" name="statement-statement-note-4-inventories-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-5-property-and-equipment-property-and-equipment-details" name="statement-statement-note-5-property-and-equipment-property-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-5-property-and-equipment-tables" name="statement-statement-note-5-property-and-equipment-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-6-intangible-assets-and-goodwill-changes-in-carrying-amount-of-goodwill-details" name="statement-statement-note-6-intangible-assets-and-goodwill-changes-in-carrying-amount-of-goodwill-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-6-intangible-assets-and-goodwill-changes-in-carrying-amount-of-intangible-assets-details" name="statement-statement-note-6-intangible-assets-and-goodwill-changes-in-carrying-amount-of-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-6-intangible-assets-and-goodwill-estimated-future-amortization-for-intangible-assets-details" name="statement-statement-note-6-intangible-assets-and-goodwill-estimated-future-amortization-for-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-6-intangible-assets-and-goodwill-intangible-assets-details" name="statement-statement-note-6-intangible-assets-and-goodwill-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-6-intangibles-assets-and-goodwill-tables" name="statement-statement-note-6-intangibles-assets-and-goodwill-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-8-commitments-and-contingencies-aggregate-net-minimum-rental-commitments-details" name="statement-statement-note-8-commitments-and-contingencies-aggregate-net-minimum-rental-commitments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-8-commitments-and-contingencies-tables" name="statement-statement-note-8-commitments-and-contingencies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-9-sharebased-compensation-and-other-benefit-plan-assumptions-used-in-blackscholes-optionpricing-model-details" name="statement-statement-note-9-sharebased-compensation-and-other-benefit-plan-assumptions-used-in-blackscholes-optionpricing-model-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-9-sharebased-compensation-and-other-benefit-plans-stock-option-activity-details" name="statement-statement-note-9-sharebased-compensation-and-other-benefit-plans-stock-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-note-9-sharebased-compensation-and-other-benefit-plans-tables" name="statement-statement-note-9-sharebased-compensation-and-other-benefit-plans-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="tech_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
