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      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY'S ENDOWMENT FUNDS CONSIST OF APPROXIMATELY 66 INDIVIDUAL FUNDS ESTABLISHED FOR A VARIETY OF PURPOSES INCLUDING BOTH DONOR-RESTRICTED ENDOWMENT FUNDS AND FUNDS DESIGNATED BY THE BOARD OF DIRECTORS TO FUNCTION AS ENDOWMENTS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY IS EXEMPT FROM FEDERAL AND STATE INCOME TAXES UNDER SECTION 501(C)(3) OF THE U.S. INTERNAL REVENUE CODE AND THE APPLICABLE STATE TAX STATUTES. IN ADDITION, THE SOCIETY QUALIFIES FOR THE CHARITABLE CONTRIBUTION DEDUCTION UNDER SECTION 170(B)(1)(A) AND HAS BEEN QUALIFIED AS A SOCIETY THAT IS NOT A PRIVATE FOUNDATION UNDER SECTION 509(A)(2). THE SOCIETY IS SUBJECT TO UNRELATED BUSINESS INCOME TAXES FOR ACTIVITIES IT ENGAGES IN THAT DO NOT MEET THE EXEMPT PURPOSE OF THE SOCIETY. THE SOCIETY'S FORMS 990-T ARE SUBJECT TO EXAMINATION BY TAXING AUTHORITIES FOR THE YEARS 2022 THROUGH 2019. THE SOCIETY ADHERES TO THE GUIDANCE FOR ACCOUNTING FOR THE UNCERTAINTY IN INCOME TAXES, WHICH ESTABLISHES THRESHOLDS AS THEY RELATE TO ACCOUNTING FOR UNCERTAIN INCOME TAX POSITIONS. FINANCIAL ACCOUNTING STANDARDS BOARD (FASB) ACCOUNTING STANDARDS CODIFICATION (ASC) 740-10 DEFINES THE THRESHOLD FOR RECOGNIZING THE BENEFITS OF TAX POSITIONS IN THE FINANCIAL STATEMENTS AS MORE-LIKELY-THAN-NOT TO BE SUSTAINED BY THE RELEVANT TAXING AUTHORITY AND REQUIRE MEASUREMENT OF SUCH TAX POSITIONS MEETING THE MORE-LIKELY-THAN-NOT CRITERION. MANAGEMENT BELIEVES THAT THE SOCIETY CONTINUES TO SATISFY THE REQUIREMENTS OF A TAX-EXEMPT ORGANIZATION AT JUNE 30, 2024. MANAGEMENT HAS EVALUATED ALL TAX POSITIONS THAT COULD HAVE A SIGNIFICANT EFFECT ON THE FINANCIAL STATEMENTS AND DETERMINED THE SOCIETY HAD NO UNCERTAIN INCOME TAX POSITIONS AS OF JUNE 30, 2024 AND 2023 AND, ACCORDINGLY, NO LIABILITY HAS BEEN ACCRUED.</ExplanationTxt>
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        <FormAndLineReferenceDesc>PART V, LINE 1E</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AMOUNT OF OTHER EXPENDITURESW FOR FACILITIES AND PROGRAMS WAS OVERSTTATED IN THE PRIOR YEAR. THE AMOUNT ORIGINALLY REPORTED WAS $1,127,014. THE CORRECT AMOUNT WAS $889,379. THIS HAS BEEN UPDATED IN PART V SO THAT THE ENDING ENDOWMENT BALANCES FOR THE CURRENT YEAR AND THE PRIOR YEAR ARE BOTH CORRECT.</ExplanationTxt>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>SIGMA XI PROGRAMS</GrantTypeTxt>
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        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>GRANT RECIPIENTS ARE REQUIRED TO SUBMIT A NARRATIVE REPORT OF THE PROJECT THAT RECEIVED FUNDING FROM SIGMA XI WITHIN 1 YEAR AFTER THE DISBURSEMENT DATE OF THE AWARD FUNDS. REPORTS ARE NOT REQUIRED TO INCLUDE RECEIPTS OR DETAILED LIST OF EXPENDITURES AS LONG AS THE EXPENSES MATCH THE BUDGET OF THE SUBMITTED GRANT APPLICATION. IF A GRANT RECIPIENT NEEDS TO DEVIATE FROM THE PROPOSAL BUDGET, THEY ARE REQUIRED TO SUBMIT A REQUEST BY EMAIL DETAILING THEIR NEW BUDGET. MODIFICATIONS ARE APPROVED IF THEY ARE CONSISTENT WITH THE PROGRAM GUIDELINES.</ExplanationTxt>
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        <PersonNm>JAMIE L VERNON PHD</PersonNm>
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        <PersonNm>JASMINE SHAH</PersonNm>
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        <PersonNm>LISA MERRITT</PersonNm>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE COMMITTEE IS COMPRISED OF PRESIDENT, PRESIDENT-ELECT, PAST PRESIDENT, TREASURER, TWO DIRECTORS SELECTED ONE EACH FROM REGIONAL DIRECTORS AND CONSTITUENCY DIRECTORS AND THE EXECUTIVE DIRECTOR IS A MEMBER WITHOUT VOTE. THE EXECUTIVE COMMITTEE SHALL HAVE THE RESPONSIBILITY TO ACT FOR THE BOARD OF DIRECTORS BETWEEN MEETINGS WITH RESPECT TO MATTERS NOT EXCLUDED IN SUBSECTION (IV) BELOW:(A) WHEN ACTION IS REQUIRED AND THE EXIGENCIES OF THE SITUATION WILL NOT PERMIT A DELAY UNTIL THE NEXT MEETING OF THE BOARD OF DIRECTORS OR UNTIL A BALLOT CAN BE TAKEN;B) WHEN THE DEFREE OF CONFIDENTIALITY IS SO GREAT AS TO REQUIRE CONSIDERATION BY A SMALLER GROUP; C) WHEN THE EXECUTIVE DIRECTOR REQUIRES AN ADVISE-AND-CONSENT SERVICE. THE EXECUTIVE COMMITTEE SHALL ALSO HAVE THE RESPONSIBILITY TO ASSET THE BOARD OF DIRECTORS BY (A) GIVING PRELIMINARY CONSIDERATION TO MATTERS WHERE AN APPROPRIATE COMMITTEE DOES NOT EXIST OR WHEN TIME DOES NOT ALLOW REFERRAL TO THE APPROPRIATE COMMITTEE, B) MEETING SHORTLY BEFORE EACH MEETING OF THE BOARD OF DIRECTORS TO AID IN ASSISTING THE BOARD OF DIRECTORS IN ACHIEVING THE INFORMED DECISIONS IN A SHORT PERIOD OF TIME, AND C) TAKING ACTDION ON SPECIFIC MATTERS AS REQUESTED BY THE BOARD OF DIRECTORS. LIMITATIONS:THE EXECUTIVE COMMITTEE OF THE BOARD OF DIRECTORS SHALL NOT HAVE THE POWER TO A) ELECT OR REMOVE OFFICERS, EXCEPT TO RECOMMEND REMOVAL OF THE EXECUTIVE DIRECTOR; B) ACT IN CONTRAVENTION OF POLICIES ESTABLISHED BY THE BOARD OF DIRECTORS;C) AUTHORIZE THE SALE OR OTHER DISPOSITION OF ALL OR ANY SUBSTANTIAL PORTION OF THE ASSETS OF THE SOCIETY; D) ACT FOR THE BOARD OF DIRECTORS IN GRANTING AND REVOKING CHARTERS FOR CHAPTERS OR E) CREATE AND AUTHORIZE NEW POLICY.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY CONSISTS OF ACTIVE AND INACTIVE MEMBERS. THE MEMBERSHIP OF THE SOCIETY IS DIVIDED INTO MEMBERSHIP GRADES, FULL AND ASSOCIATE. A MEMBER IS ANY INDIVIDUAL WHO HAS SHOWN NOTEWORTHY ACHIEVEMENTS AS AN ORIGINAL INVESTIGATOR IN A FIELD OF PURE OR APPLIED SCIENCE. AN ASSOCIATE MEMBER IS ANY INDIVIDUAL WHO HAS, THROUGH INITIAL RESEARCH ACHIEVEMENT IN A FIELD OF PURE OR APPLIED SCIENCE, SHOWN APTITUDE FOR RESEARCH WHICH IS EXPECTED IN DUE COURSE TO LEAD TO THE FULFILLMENT OF THE REQUIREMENTS FOR FULL MEMBERSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS IS ELECTED BY ACTIVE MEMBERS. EACH MEMBER IS GIVEN ONE VOTE WHEN VOTING FOR DIRECTORS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>PRIOR TO THE BOARD MEETING, THE FORM 990 IS POSTED TO SIGMA XI'S FORUM FOR THE DIRECTORS TO REVIEW. ANY QUESTIONS THE DIRECTORS HAVE REGARDING THE FORM WILL BE ADDRESSED BY THE EXECUTIVE DIRECTOR, TREASURER, OR ASSISTANT TREASURER/DIRECTOR OF FINANCE AND ADMINISTRATION. THE PRESIDENT OR EXECUTIVE DIRECTOR THEN SIGNS THE FORM 990 FOR FILING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CONFLICT OF INTEREST POLICY IS ANNUALLY SIGNED BY THE BOARD OF DIRECTORS AND RETAINED BY THE EXECUTIVE ASSISTANT. AS FOR THE STAFF, THE CURRENT POLICY IS POSTED ON THE ONLINE STAFF COMMUNITY. NEW HIRES SIGN THE COPY OF THE HANDBOOK THAT CONTAINS THE CODE OF ETHICS POLICY. TO ENSURE COMPLIANCE WITH THE CODE OF ETHICS AND ALL LEGAL AND REGULATORY REQUIREMENTS RELEVANT TO SIGMA XI'S BUSINESS, THE BOARD OF DIRECTORS AND OFFICERS HAVE CREATED AND MONITOR A COMPLIANCE PROGRAM. THE BOARD OF DIRECTORS HAS AUTHORIZED THE EXECUTIVE COMMITTEE TO ACT AS THE ETHICS COMMITTEE TO IMPLEMENT AND SUPERVISE THE COMPLIANCE PROGRAM AT ALL LEVELS OF SIGMA XI. SPECIFICALLY, THE ETHICS COMMITTEE HAS OVERALL RESPONSIBILITY FOR RECOMMENDING CHANGES IN THE CODE OF ETHICS, ESTABLISHING TRAINING PROGRAMS DESIGNED TO EDUCATE ALL OFFICERS, DIRECTORS, AND MEMBERS OF COMMITTEES ABOUT THE CODE, PROVIDING GUIDANCE REGARDING THE MEANING AND APPICATION OF THE CODE, MONITORING COMPLIANCE WITH THE CODE'S STANDARDS, REPORTING KNOWN VIOLATIONS OF LAW TO APPROPRIATE GOVERNMENTAL AUTHORITIES AND PROVIDING PERIODIC REPORTS TO THE AUDIT COMMITTEE OF THE BOARD OF DIRECTORS ON THE EFFECTIVENESS OF THE CODE AND ITS COMMUNICATIONS TO OFFICERS, DIRECTORS, AND MEMBERS OF THE COMMITTEES. ACTUAL OR SUSPECTED VIOLATIONS OF THE CODE ARE TO BE REPORTED TO A MEMBER OF THE ETHICS COMMITTEE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH YEAR THE PERFORMANCE REVIEW COMMITTEE MEETS TO DISCUSS THE PERFORMANCE AND COMPENSATION OF THE EXECUTIVE DIRECTOR. ACCOMPLISHMENTS AND GOALS ARE FORMED AND REVIEWED DURING THIS PROCESS. ANY CHANGE IN COMPENSATION IS REVIEWED AT THIS TIME. THE PERFORMANCE REVIEW COMMITTEE USED THE 2021 MANAGEMENT COMPENSATION REPORT FOR NOT FOR PROFIT ORGANIZATIONS PUBLISHED BY PRM CONSULTING GROUP. THE FINAL COMPENSATION IS APPROVED BY THE PERFORMANCE REVIEW COMMITTEE AND A REPORT IS SHARED WITH THE BOARD OF DIRECTORS. THERE ARE NO KEY EMPLOYEES AT THE PRESENT TIME; HOWEVER, IN THE EVENT KEY EMPLOYEES ARE ENGAGED, A SIMILAR PROCESS WILL BE USED. THE PROCESS DESCRIBED HERE WAS LAST COMPLETED IN 2023.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PROCESS HAS NOT CHANGED FROM PRIOR YEAR.</ExplanationTxt>
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