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  <xs:element name="LeasesScheduleofMinimumLeasePaymentsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_LeasesScheduleofMinimumLeasePaymentsDetailsLineItems"/>
  <xs:element name="StockholdersEquityScheduleofStockOptionActivityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_StockholdersEquityScheduleofStockOptionActivityDetailsTable"/>
  <xs:element name="StockholdersEquityScheduleofStockOptionActivityDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_StockholdersEquityScheduleofStockOptionActivityDetailsLineItems"/>
  <xs:element name="StockholdersEquityScheduleofWeightedAverageAssumptionsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_StockholdersEquityScheduleofWeightedAverageAssumptionsDetailsTable"/>
  <xs:element name="StockholdersEquityScheduleofWeightedAverageAssumptionsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_StockholdersEquityScheduleofWeightedAverageAssumptionsDetailsLineItems"/>
  <xs:element name="IncomeTaxesScheduleofProvisionforIncomeTaxesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_IncomeTaxesScheduleofProvisionforIncomeTaxesDetailsTable"/>
  <xs:element name="IncomeTaxesScheduleofProvisionforIncomeTaxesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_IncomeTaxesScheduleofProvisionforIncomeTaxesDetailsLineItems"/>
  <xs:element name="EffectiveIncomeTaxRateReconciliationDiscountsAndInterestOnNotes" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_EffectiveIncomeTaxRateReconciliationDiscountsAndInterestOnNotes"/>
  <xs:element name="EffectiveIncomeTaxRateReconciliationFinancingCosts" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_EffectiveIncomeTaxRateReconciliationFinancingCosts"/>
  <xs:element name="IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetailsTable"/>
  <xs:element name="IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetailsLineItems"/>
  <xs:element name="DeferredTaxAssetsReductionInNetOperatingLossCarryforwards" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="apm_DeferredTaxAssetsReductionInNetOperatingLossCarryforwards"/>
  <xs:element name="DeferredTaxAssetsResearchAndDevelopmentExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="apm_DeferredTaxAssetsResearchAndDevelopmentExpenses"/>
  <xs:element name="IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetailsTable"/>
  <xs:element name="IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_IncomeTaxesScheduleofUnrecognizedTaxBenefitsDetailsLineItems"/>
  <xs:element name="SharesIssuedAndOutstandingPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_SharesIssuedAndOutstandingPercentage"/>
  <xs:element name="BasisofPresentationDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_BasisofPresentationDetailsTable"/>
  <xs:element name="BasisofPresentationDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_BasisofPresentationDetailsLineItems"/>
  <xs:element name="ResearchUnderGrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="apm_ResearchUnderGrants"/>
  <xs:element name="IntangibleAssetsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_IntangibleAssetsDetailsTable"/>
  <xs:element name="IntangibleAssetsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_IntangibleAssetsDetailsLineItems"/>
  <xs:element name="PropertyandEquipmentNetDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_PropertyandEquipmentNetDetailsTable"/>
  <xs:element name="PropertyandEquipmentNetDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_PropertyandEquipmentNetDetailsLineItems"/>
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  <xs:element name="LeasesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_LeasesDetailsTable"/>
  <xs:element name="LeasesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_LeasesDetailsLineItems"/>
  <xs:element name="StockholdersEquityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_StockholdersEquityDetailsTable"/>
  <xs:element name="StockholdersEquityDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_StockholdersEquityDetailsLineItems"/>
  <xs:element name="ShareBasedCompensationArrangementIncreaseInNumberOfSharesAvailableForGrantPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="apm_ShareBasedCompensationArrangementIncreaseInNumberOfSharesAvailableForGrantPercentage"/>
  <xs:element name="IncomeTaxesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_IncomeTaxesDetailsTable"/>
  <xs:element name="IncomeTaxesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_IncomeTaxesDetailsLineItems"/>
  <xs:element name="PercentageOfFutureTaxableIncome" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_PercentageOfFutureTaxableIncome"/>
  <xs:element name="DefinedContributionPlanDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_DefinedContributionPlanDetailsTable"/>
  <xs:element name="DefinedContributionPlanDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_DefinedContributionPlanDetailsLineItems"/>
  <xs:element name="SubsequentEventsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="apm_SubsequentEventsDetailsTable"/>
  <xs:element name="SubsequentEventsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_SubsequentEventsDetailsLineItems"/>
  <xs:element name="PurchaseWarrant" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="apm_PurchaseWarrant"/>
  <xs:element name="GrossProceeds" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="apm_GrossProceeds"/>
  <xs:element name="ConsultantsAndContractorsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_ConsultantsAndContractorsMember"/>
  <xs:element name="ContractCostsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_ContractCostsMember"/>
  <xs:element name="DIAMIRBIOSCIENCESCORPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_DIAMIRBIOSCIENCESCORPMember"/>
  <xs:element name="DeferredRevenueMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_DeferredRevenueMember"/>
  <xs:element name="DepreciationMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_DepreciationMember"/>
  <xs:element name="ExecutiveDirectorMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_ExecutiveDirectorMember"/>
  <xs:element name="FormerChiefScientificOfficerMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_FormerChiefScientificOfficerMember"/>
  <xs:element name="FounderOneMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_FounderOneMember"/>
  <xs:element name="FounderTwoMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_FounderTwoMember"/>
  <xs:element name="FoundersMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_FoundersMember"/>
  <xs:element name="LaboratoryEquipmentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_LaboratoryEquipmentMember"/>
  <xs:element name="OfferingCostsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_OfferingCostsMember"/>
  <xs:element name="OtherMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_OtherMember"/>
  <xs:element name="OtherRDMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_OtherRDMember"/>
  <xs:element name="PatentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_PatentMember"/>
  <xs:element name="RentAndFacilitiesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_RentAndFacilitiesMember"/>
  <xs:element name="SalariesAndBenefitsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_SalariesAndBenefitsMember"/>
  <xs:element name="ShareEcxhangeAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_ShareEcxhangeAgreementMember"/>
  <xs:element name="StockBasedCompensationMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_StockBasedCompensationMember"/>
  <xs:element name="StockOptionPlanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_StockOptionPlanMember"/>
  <xs:element name="TwoThousandAndTwentyFourStockOptionPlanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_TwoThousandAndTwentyFourStockOptionPlanMember"/>
  <xs:element name="UnbilledRevenueMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_UnbilledRevenueMember"/>
  <xs:element name="BasisOfPresentationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_BasisOfPresentationAbstract"/>
  <xs:element name="DisclosureLeasesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_DisclosureLeasesAbstract"/>
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  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="apm_DocumentAndEntityInformationAbstract"/>
</xs:schema>
