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  2. Serum-separating tube - Wikipedia

    en.wikipedia.org/wiki/Serum-separating_tube

    The gel in SST II tubes (which appears slightly less opaque) is supposed [weasel words] to have less effect on drug levels in serum. [ citation needed ] Blood samples should be allowed time to form a clot at room temperature for 30–60 min. [ 6 ]

  3. Board examination - Wikipedia

    en.wikipedia.org/wiki/Board_examination

    The 2025 CBSE board examination for Class 10 were held from 15 February till 18 March and from 15 February till 4 April for class 12. The usual starting time for each exam was 10:30 am but depending on the length and/or maximum marks for the subject, the finishing time was either 12:30 pm (2 hours, shorter exams, usually 40-50 marks) or 1:30 pm ...

  4. Madhyamik Pariksha - Wikipedia

    en.wikipedia.org/wiki/Madhyamik_Pariksha

    In addition, corresponding to each paper worth 90 (rather than the full 100) points, the school is allocated 10 points for internal evaluation. One exception is when the examinee does not take the exam from any school, in which case there are 10 extra points in the written papers. As, decision of the board pass marks is 25%.

  5. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    This article needs attention from an expert in chemistry. The specific problem is: Incomplete list. WikiProject Chemistry may be able to help recruit an expert.

  6. Junior Science Talent Search Examination - Wikipedia

    en.wikipedia.org/wiki/Junior_Science_Talent...

    100 questions 100 marks 120 minutes; II . General Science and Mathematics with Social Science 100 questions 100 marks 120 minutes; Although the time for attempting the MAT Section and the SAT Section (Mathematics & Science) is different, but the paper has to be submitted altogether soon after the writing time has finished

  7. The Golden Book of Chemistry Experiments - Wikipedia

    en.wikipedia.org/wiki/The_Golden_Book_of...

    The book was also believed to be a source of inspiration to David Hahn, nicknamed "the Radioactive Boy Scout" by the media, who attempted to construct a nuclear reactor in his mother's shed, [2] although the book does not include any nuclear reactions. Due to safety concerns, the book was eventually pulled from library shelves. [3]

  8. Branches of science - Wikipedia

    en.wikipedia.org/wiki/Branches_of_science

    Example sub-disciplines of chemistry include: biochemistry, the study of substances found in biological organisms; physical chemistry, the study of chemical processes using physical concepts such as thermodynamics and quantum mechanics; and analytical chemistry, the analysis of material samples to gain an understanding of their chemical ...

  9. Leaching (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Leaching_(chemistry)

    Biological substances can experience leaching themselves, [2] as well as be used for leaching as part of the solvent substance to recover heavy metals. [6] Many plants experience leaching of phenolics, carbohydrates, and amino acids, and can experience as much as 30% mass loss from leaching, [5] just from sources of water such as rain, dew, mist, and fog. [2]

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