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|a eng
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| 044 |
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|b ليبيا
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| 100 |
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|9 665693
|a Bilgasem, S. M.
|e Author
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| 245 |
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|a Catalase Activity of Human Polymorphonuclear Leukocytes
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| 260 |
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|b جامعة طرابلس - نقابة أعضاء هيئة التدريس
|c 2017
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| 300 |
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|a 29 - 38
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| 336 |
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|a بحوث ومقالات
|b Article
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| 520 |
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|b In vitro a high proportion of oxygen free radical produced by polymorphonuclear leukocytes (PMNL) is converted to hydrogen peroxide and a number of studies have utilized H2O2 production as measure of free radical production. However, mammalian cells contain enzymes which produce H2O2 directly. Amongst these are the amine oxidase, catalyzing reaction (1). In addition, catalse is present in most cells and contributes to the elimination of H2O2 via reaction (2). RCH2NH2 + H2O ===> RCHO + NH4 + H2O2 (1) 2H2O2 ====> 2H O + O (2) Because several enzymes may contribute to H O production and others to its elimination, the aim of the investigation was to show the measurements of H2O2 production may not accurately represent free radical production or the activity of enzymes which produce H2O2 directly. Catalase activity was assayed, in homogenates of isolated PMNL cells, at pH 7.4 and 37°C with 50 nmol H2O2 . Values are mean ± s.e. for 6 blood samples, three from each of two adult male donors. The activity was, 2700 ± 500 μmol/h/109 cells. The high catalase activity of these cells indicated that this enzyme may influence the measured H2O2 level.
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| 653 |
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|a ضيق النفس الحاد
|a الأمراض التنفسية
|a سرطان الدم النخاعي
|a الكائنات الحية
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| 692 |
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|b Polymorphonuclear Leukocytes (PMNL)
|b Hydrogen Peroxide (H2O2)
|b Catalase
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| 700 |
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|9 665695
|a Eljerbi, O. O.
|e Co-Author
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| 773 |
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|4 التربية والتعليم
|6 Education & Educational Research
|c 004
|e Al-OstaTh
|l 013
|m ع13
|o 1594
|s مجلة الأستاذ
|v 000
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| 856 |
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|u 1594-000-013-004.pdf
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| 930 |
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|d y
|p y
|q n
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| 995 |
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|a EduSearch
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| 999 |
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|c 1247662
|d 1247662
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