Xem 1-20 trên 55 kết quả Free radicals
  • ScienThirty types of commercial Vietnamese-brand teas (21 green teas, 5 black teas, 4 oolong teas) in Ho Chi Minh city were investigated for total polyphenols content (TPCacid gallic equivalent), total catechins content (TCC-catechin equivalent) and DPPH (2,2diphenyl-1-picrylhydrazyl) free radical scavenger activity (RSA - Vitamine C equivalent).

    pdf7p phalinh19 20-08-2011 49 15   Download

  • Preparations derived from Lentinula edodes (Berk.) Pegl. mycelium are worldwide used as dietary supplements containing compounds active as immune system enhancers, demonstrating chemopreventive and anticancer activity. L. edodes mycelium enriched with organic forms of selenium like selenized yeast possess putative, higher cancer preventive properties. The objective of this study was to test the effect of enrichment in selenium on antioxidant, reducing and free radical scavenging activity of water and alcohol extracts from mycelium of L. edodes (Berk.).

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  • Glyoxal is a key compound involved in glyoxal oxidase (GLOX)-dependent production of glyoxylate, oxalate and H2O2 by lignin-degrading basidiomycetes. In this paper, we report that glyoxal was produced from a metabolite of ligninolytic fungi, linoleic acid, by manganese peroxidase (MnP)-dependent lipid peroxidation. In the absence of the parent substrate of linoleic acid, the dialdehyde was oxidized by MnP and Mn(III) chelate to start free radical reactions with emission of chemiluminescence at 700– 710 nm. ...

    pdf9p system191 01-06-2013 24 4   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài: Role of free radicals in the pathogenesis of acute chest syndrome in sickle cell disease...

    pdf6p toshiba13 22-10-2011 18 2   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: Free radical theory of autoimmunity

    pdf16p toshiba17 31-10-2011 19 2   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Beneficial effect of the oxygen free radical scavenger amifostine (WR-2721) on spinal cord ischemia/reperfusion injury in rabbits...

    pdf12p thulanh24 21-11-2011 26 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Free radical scavenging activity and lipoxygenase inhibition of Mahonia aquifolium extract and isoquinoline alkaloids,,,

    pdf7p thulanh27 13-12-2011 26 2   Download

  • Tuyển tập các báo cáo nghiên cứu khoa học ngành y học tạp chí Medical Sciences dành cho các bạn sinh viên ngành y tham khảo đề tài: Relationships between free radical levels during carotid endarterectomy and markers of arteriosclerotic disease...

    pdf7p thulanh9 07-10-2011 17 1   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Combined antibiotic and free radical trap treatment is effective at combating Staphylococcus-aureus-induced septic arthritis...

    pdf5p thulanh12 12-10-2011 18 1   Download

  • (BQ) Part 2 book "Marks’ basic medical biochemistry: A clinical approach" presents the following contents: Oxidation of fatty acids and ketone bodies, oxygen toxicity and free radical injury, metabolism of ethanol, basic concepts in the regulation of fuel metabolism by insulin, glucagon, and other hormones, digestion, absorption and transport of carbohydrates,... Invite you to consult.

    pdf503p thangnamvoiva2 23-06-2016 7 1   Download

  • A New and Radical Approach To Spiritual Evolution By Stephen Davis. George had a problem. Although he hid it fairly well, George was basically unhappy. He was feeling unfulfilled; his life had become dull and boring; he hated his job; he was probably going to be fired soon because of the economic recession; his relationship with his wife had gone south

    pdf314p hkquoc 07-10-2010 76 21   Download

  • 5.4. Spaces: Your Free Quad-Display Mac Exposé made a big splash when it debuted in Mac OS X 10.3. But Leopard offers another radical step forward in window management that you may even come to prefer. It's called Spaces.

    pdf6p kisiheo 26-07-2010 44 5   Download

  • Metformin (1,1-dimethylbiguanide) is an antihyperglycae-mic drug used to normalize glucose concentrations in type 2 diabetes. Furthermore, antioxidant benefits have been reported in diabetic patients treated with metformin. This work was aimed at studying the scavenging capacity of this drug against reactive oxygen species (ROS) like Æ OH and O Æ 2 -free radicals. ROS were produced by gamma radio-lysis of water. The irradiated solutions of metformin were analyzed by UV/visible absorption spectrophotometry.

    pdf8p awards 05-04-2013 16 1   Download

  • Nước là sự sống, con người cần phải uống nước để sống được và cảm thấy khoẻ mạnh, nhưng bạn cần biết mình nên uống những gì để tốt cho sức khoẻ. Trà xanh Tác dụng: Giảm nguy cơ bị loãng xương, ung thư và các bệnh tim mạch. Trà xanh chứa nhiều flavonoid, polyphenol và các chất chống ô xy hoá giúp bảo vệ tế bào khỏi các tác động có hại và trung hoà các free radical (phân tử bị ô xy hoá).

    pdf6p nguquaivietnam 03-08-2010 121 43   Download

  • Free radicals are constantly formed in living cells and removed by antioxidant defenses. Antioxidant enzymes are the main line of defense against free radicals in animal and plant cells. Uncontrolled generation ROS are involved in a number of human disease states, including diabetes and cancer due to disturbance in cellular and molecular processes including cell growth, differentiation and proliferation.

    pdf410p camchuong_1 04-12-2012 53 19   Download

  • The production of free radicals (ROS) is an unavoidable consequence of life in an aerobic environment. Free radicals produced from the metabolic activities of oxygen attack biological membranes and lipoproteins via oxidation in a process called lipid perioxidation. This attack damages cells and lipids often in a chain reaction with carbon-based molecules such as polyunsaturated fatty acids (PUFA) in a reaction with molecular oxygen. This creates oxidative stress and damage to tissues. Free radicals also damage chromosomal DNA.

    pdf272p mnemosyne75 02-02-2013 28 8   Download

  • There is growing evidence on the importance of studies focusing on mechanisms and strategies leading to cancer prevention. The plethora of approaches include regulation of oxidative stress using antioxidant therapies, carefully balanced diets and living habits, epidemiological evidence and molecular approaches on the role of key biological molecules such as antioxidant enzymes, vitamins, proteins and naturally occurring free radical scavengers as well as controversial results and clinical applications. These are some of the topics that this book highlights.

    pdf488p wqwqwqwqwq 20-07-2012 33 7   Download

  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí hóa học quốc tế đề tài : Urinary and sexual outcomes in long-term (5+ years) prostate cancer disease free survivors after radical prostatectomy

    pdf8p panasonic07 04-01-2012 24 6   Download

  • Depending on their structures, polyphenols (e.g. tea polyphenols) could also act by chelating prooxidant transition metal ions such as Fe2+, which are involved in reactions eliciting free radical production, including hydroxyl radicals (OH•) and alkoxyl radicals (RO•) (Dufresne & Farnworth, 2001).

    pdf390p wqwqwqwqwq 23-07-2012 35 6   Download

  • Controlled oxidation is increasingly being practiced using solid peroxides, pH modifiers, and catalysts that promote the generation of free radicals. This new approach moderates the rate of dissolution and peroxide generation, which in turn controls that rate of reaction between peroxide and the petroleum contaminants. The use of slurried peroxides creates the opportunity to release oxidants and oxygen over a longer period, which can promote subsequent aerobic remediation.

    pdf182p cao_can 29-12-2012 37 6   Download

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