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  <xs:element id="aztr_Year2026AwardOneMember" abstract="true" name="Year2026AwardOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2026AwardTwoMember" abstract="true" name="Year2026AwardTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2026AwardThreeMember" abstract="true" name="Year2026AwardThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2026AwardFourMember" abstract="true" name="Year2026AwardFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ClassOfWarrantOrRightWarrantsOutstandingWeightedAverageRemainingContractualLife" abstract="false" name="ClassOfWarrantOrRightWarrantsOutstandingWeightedAverageRemainingContractualLife" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingPeriodIncreaseDecreaseWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingPeriodIncreaseDecreaseWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableNumber" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="aztr_SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm1" abstract="false" name="SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm1" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="aztr_TwoThousandTwentyThreeStockIncentivePlanMember" abstract="false" name="TwoThousandTwentyThreeStockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_TwoThousandSixteenStockIncentivePlanMember" abstract="false" name="TwoThousandSixteenStockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAutomaticAnnualIncreaseToSharesAvailableForIssuancePercentageOfStock" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAutomaticAnnualIncreaseToSharesAvailableForIssuancePercentageOfStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAutomaticAnnualIncreaseToSharesAvailableForIssuanceTerm" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAutomaticAnnualIncreaseToSharesAvailableForIssuanceTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsUnderlyingCommonStockValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsUnderlyingCommonStockValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="aztr_ExercisePrice0.29Member" abstract="true" name="ExercisePrice0.29Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ExercisePrice340.20Member" abstract="true" name="ExercisePrice340.20Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ExercisePrice413.59Member" abstract="true" name="ExercisePrice413.59Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ConversionOfPreferredStockToCommonStockMember" abstract="true" name="ConversionOfPreferredStockToCommonStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_MontrealQuebecMember" abstract="true" name="MontrealQuebecMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_BranfordCTMember" abstract="false" name="BranfordCTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_GrotonCTMember" abstract="false" name="GrotonCTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_LicenseAgreementTerm" abstract="false" name="LicenseAgreementTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_LicenseAgreementLengthOfWrittenNoticeRequiredForTermination" abstract="false" name="LicenseAgreementLengthOfWrittenNoticeRequiredForTermination" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_OperatingLeasePaymentsPercentageIncreasePerYear" abstract="false" name="OperatingLeasePaymentsPercentageIncreasePerYear" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="aztr_FinanceLeaseMonthlyPayments" abstract="false" name="FinanceLeaseMonthlyPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_FinanceLeaseExpense" abstract="false" name="FinanceLeaseExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_LesseeOperatingLeaseLiabilityToBePaidAfterYearTwo" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_DefinedContributionPlanMonthsOfServiceRequired" abstract="false" name="DefinedContributionPlanMonthsOfServiceRequired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_DefinedContributionPlanMinimumWorkHours" abstract="false" name="DefinedContributionPlanMinimumWorkHours" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="aztr_DefinedContributionPlanMinimumWorkHoursInFirstYearOfService" abstract="false" name="DefinedContributionPlanMinimumWorkHoursInFirstYearOfService" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="aztr_DefinedContributionPlanAdditionalEmployerMatchingContributionPercentOfMatch" abstract="false" name="DefinedContributionPlanAdditionalEmployerMatchingContributionPercentOfMatch" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="aztr_DefinedContributionPlanAdditionalEmployerMatchingContributionAdditionalPercentOfEmployeesGrossPay" abstract="false" name="DefinedContributionPlanAdditionalEmployerMatchingContributionAdditionalPercentOfEmployeesGrossPay" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="aztr_FixedAssetsOriginalCostBasis" abstract="false" name="FixedAssetsOriginalCostBasis" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_PaymentOfRetentionBonusesApproved" abstract="false" name="PaymentOfRetentionBonusesApproved" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>