free radical scavenging by carotenoids
Báo cáo y học: " Free radical scavenging activity and lipoxygenase inhibition of Mahonia aquifolium extract and isoquinoline alkaloids" ppt
... of enzyme activity inhibition Radical scavenging assay The free radical scavenging capacity of the compounds tested, crude extract and fractions was determined by using DPPH assay [18-20] The ... 2) Radical scavenging activity In order to assess the radical scavenging potential of the crude extract, fractions I, II and the compounds isolated, the reactivity towards the stable free radical ... 2.87.10-6 mol/L), as indicated by the consistency with results of DPPH radical scavenging assay In conclusion, our results indicate that although the direct scavenging of free radicals cannot be ruled...
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Báo cáo Y học: Production and chemiluminescent free radical reactions of glyoxal in lipid peroxidation of linoleic acid by the ligninolytic enzyme, manganese peroxidase pot
... tartrate is too low to be involved in the free radical reactions by Mn(III) For instance, Perez reported that veratryl alcohol oxidation by LiP is not affected by the presence of tartrate in the presence ... peroxidation in wood decay by white rot fungi With regard to the radicals produced in the lipid peroxidation by MnP, we reported that MnP oxidized linoleic acid to generate acyl radicals in acetate ... electronically excited species from acyl radicals reported before [28,30–32] Aldehydes are oxidized by carboncentered radicals and metal salts to form acyl radicals [22,23] Triplet carbonyls, biacyl...
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Báo cáo y học: "Relationships between free radical levels during carotid endarterectomy and markers of arteriosclerotic disease"
... time from sampling to freezing was thus less than two minutes Int J Med Sci 2007, 2.2.4 Measurement of radical production OXANOH was used as a spin trap The stable nitroxide radical 2-ethyl-2,4,4-trimethyloxazolidine-3-3-yloxy ... 2-ethyl-3-hydroxy-2,4,4-trimethyloxazolidine (OXANOH) by gassing a 10 mM solution of the radical with hydrogen for 45 minutes in the presence of the catalyst platinum dioxide (PtO2) On contact with a radical, OXANOH is reoxidised ... relationships between the production of free radicals during and after operation for stenosis of the carotid artery and blood levels of ICAM-1, MMP-9, MCP-1 and oxLDL Radical production has been calculated...
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Báo cáo khóa học: Membrane transport of fatty acylcarnitine and free L-carnitine by rat liver microsomes pot
... ÔintactnessÕ as judged by enzyme latency is a significant finding as a key feature of the scheme in Fig is that free carnitine should be able to escape from the ER after its generation by the luminal CAT ... envisaged in Fig there must additionally be a means whereby the L-carnitine product can escape from the ER and there must be a supply of ER luminal free CoASH The CAC protein is not expressed at detectable ... CoASH [12] 2,3 Fed male Sprague–Dawley rats (180–220 g) were killed by an approved schedule/method [schedule/method approved by the UK Home Office under the Act of Parliament ÔAnimals (Scientific...
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Báo cáo khoa học: Superoxide radical-scavenging effects from polymorphonuclear leukocytes and toxicity in human cell lines of newly synthesized organic selenium compounds potx
... Mazur M & Telser J (2007) Free radicals and antioxidants in normal physiological functions and human disease Int J Biochem Cell Biol 39, 44–84 Flora SJ (2007) Role of free radicals and antioxidants ... (1999) Aging and acute exercise enhance free radical generation in rat skeletal muscle J Appl Physiol 87, 465–470 Bejma J, Ramires P & Ji LL (2000) Free radical generation and oxidative stress ... compounds by examining their scavenging effects on O2– from PMA-stimulated PMNs, with or without inhibition of NADPH oxidase as an index of translocation of p47phox The generation of O2– by PMNs...
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Báo cáo khoa học: Structural function of C-terminal amidation of endomorphin Conformational comparison ofl-selective endomorphin-2 with its C-terminal free acid, studied by 1 H-NMR spectroscopy, molecular calculation, and X-ray crystallography pot
... carboxylic acid) was reported to be increased significantly if the C-terminal amide was replaced by a free acid [9] Therefore, differentiation between the l- and d-opioid receptorselective peptides ... biological function of naturally occurring opioid peptides could be explained by the ‘message-address concept’ proposed by Schwyzer [10] According to this concept, EM2 could be divided into a message ... (Tyr-Pro-PhePro-NH2) and its C-terminal free acid [8] The Ki values for the binding affinity also suggest that the d-opioid receptor affinity of EM2 is increased by the substitution of a carboxyl group...
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Báo cáo nghiên cứu khoa học: " TOTAL POLYPHENOLS, TOTAL CATECHINS CONTENT AND DPPH FREE RADICAL SCAVENGER ACTIVITY OF SEVERAL TYPES OF VIETNAM COMMERCIAL GREEN TEA" pdf
... DPPH radical scavenger activity determination: In the procedure, DPPH free radical (violet color) was reduced by antioxidant The stronger antioxidant, the fader solution color is The free radical ... products Trang TAẽP CH PHAT TRIEN KH&CN, TAP 10, SO 10 - 2007 m V E g C 3.3 DPPH free radical scavenger activity DPPH free radical scavenger activity of the first infusion brewing water were measured, ... Dimitrios I Tsimogiannis, Vassiliki Oreopoulou, The contribution of flavonoid Cring on the DPPH free radical scavenging efficiency A kinetic approach for the 3, 4-hydroxy subtituted members, Innovative...
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Báo cáo y học: "Combined antibiotic and free radical trap treatment is effective at combating Staphylococcus-aureus-induced septic arthritis" ppt
... bactericidal capacity, thereby increasing the bacterial burden and contributing to sepsis-induced mortality On the other hand, the ability of PBN to spin trap free radicals could have directly ... Rheum 1996, 39:1596-1605 Janzen EG, Blackburn BJ: Detection and identification of shortlived free radicals by en electron spin resonance trapping technique J Am Chem Soc 1968, 90:5909-5910 Bremell ... calculated by totaling all the scores for each animal tested CLOX, cloxacillin; PBN, phenyl-Ntert-butyl nitrone dants that participate in the destruction of invading microorganisms [14] PBN scavenges radicals...
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Báo cáo y học: "Functioning transferred free muscle innervated by part of the vascularized ulnar nerve connecting the contralateral cervical seventh root to themedian nerve: case repor" pptx
... of the wrist to the patient by transplantation of a vascularized ulnar nerve between the CC7 and the median nerve and a free vascularized gracilis muscle innervated by a part of the transplanted ... was mostly achieved by motion of the left scapula No active motion was observed in the left wrist and fingers The patient demonstrated complete numbness in the area innervated by the left C5-T1 ... right thigh and transplanted to the left arm The muscle, innervated by part of the vascularized ulnar nerve (7) and nourished by the transverse cervical vessels, was connected to the clavicle and...
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Báo cáo y học: "Beneficial effect of the oxygen free radical scavenger amifostine (WR-2721) on spinal cord ischemia/reperfusion injury in rabbits" docx
... Superoxide radical assay The superoxide radical assay revealed an increase of 27.43% in superoxide free radical formation in the spinal cord of the ischemic rabbits, which was decreased by 42.68% ... Figure Superoxide radical assay Superoxide radical assay The superoxide radical assay revealed a statistical significant increase (p = 0.000) of 27.43% in superoxide free radical formation in ... re-agent we used for free radicals detection has an acting-time limitation of 75 minutes As the positive results of the effectiveness of Amifostine as scavenger of free radicals in spinal cord...
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Báo cáo y học: "Free radical theory of autoimmunity" potx
... cross-link formation, and detoxification of the free intracellular drug or its reactive metabolite, e.g by conjugation with reduced glutathione by GST [4] Multi-drug resistance: possible role ... be recognized as immunogenic by B-cells and as PAMP by TLRs, thus inducing autoantibodies to nuclear antigens [56] Concurrent activation of BCR and B-cell TLR-9 by such IgG2a is due to recognition ... that by a yet uncharacterized mechanism, this could lead to multi-drug resistance during the course of treatment for these infections, and this could develop into autoimmunity However, the free radical...
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Free radical reactions from advanced organic chemistry
... and properties of free radical intermediates has been developed In this chapter, we discuss the structure of free radicals and some of the special features associated with free radical reactions ... other routes to self-annihilation are called persistent free radicals Scheme 11.1 gives some examples of long-lived free radicals A few free radicals are indefinitely stable, such as Entries 1, ... Although the existence of stable and persistent free radicals is of significance in establishing that free radicals can have extended lifetimes, most free radical reactions involve highly reactive...
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Free radical substitution reactions march
... substrates that probably proceed by radical coupling It is also likely that many of these reactions not proceed by free radicals, but rather by metal-mediated radicals or by ligand transfer on the metal ... pyrolyses Free- Radical Substitution Mechanisms24 In a free- radical substitution reaction R X ! R Y there must first be a cleavage of the substrate RX so that R radicals are produced This can happen by ... Perkins, M.J., in Kochi, J.K Free Radicals, Vol 2, Wiley, NY, 1973, pp 231271; Bolton, R.; Williams, G.H Adv Free- Radical Chem 1975, 5, 1; Nonhebel, D.C.; Walton, J.C Free- Radical Chemistry, Cambridge...
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Tài liệu How Open Is the Future- Economic, Social & Cultural Scenarios Inspired by Free & Open-Source Software (Crosstalks) pdf
... that this means free as in free speech, not free beer’ Free software is not about money, but about principles The four principles of freedom include: the freedom to use, the freedom to redistribute ... the user, who defines, by DRM systems and technological measures, whether the use of a work is exempted or not.” Roots Culture – Free Software Vibrations Inna Babylon, by Armin Medosch Armin ... no coincidence that his book is called Free Software, Free Society – he believes free software will bring salvation: ‘In the long run, making programs free is a step toward the post-scarcity...
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How to Market on the Internet for FREE!by Glen Palo©2000 ppt
... website We will show readers how to get: √ √ √ √ Free website hosting Free website promotion Free advertising Free banners Ready? OK, lets go! Chapter - Free Website Hosting Introduction Small or home ... for free using the available free tools To sum it all up, to increase sales or sponsoring that will improve your bottom line: √ Create free web pages using free hosting services √ Promote the free ... more sales The Free Web Page Site provides the name, summary and a rating of some of the more popular free website hosting sites The Free Web-page List is another site that lists free website hosting...
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Báo cáo khoa học: 15 N-Labelled proteins by cell-free protein synthesis Strategies for high-throughput NMR studies of proteins and protein–ligand complexes doc
... [15N]-labelling achieved by cell -free protein synthesis has been demonstrated for each of the 19 nonproline residues [18] Time and expense can be drastically reduced by use of cell -free systems [11,18,21], ... conversion can, however, be suppressed by heat treatment of the E coli S30 cell extract [7,19] or by replacing the originally recommended glutamate buffer [1] by acetate [7,18] Different amino acids ... 15 N-labelled proteins by cell -free synthesis K Ozawa et al Fig Combinatorial isotope labelling scheme Oval symbols identify the 15N-labelled amino acids used in the cell -free preparation of the...
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Báo cáo Y học: Concerted regulation of free arachidonic acid and hormone-induced steroid synthesis by acyl-CoA thioesterases and acyl-CoA synthetases in adrenal cells pdf
... that this effect is reverted by free AA, we can not rule out the possibility that the free AA that is esterified into acyl-CoA may come from membrane phospholipids by the action of PLA2 However, ... clarified by centrifugation at 12 000 g for 15 at °C The purification of recombinant CTE-I was performed by the GST Purification Module according to manufacturer’s instructions (Amersham Pharmacia), by ... bovine serum albumin Steroids produced were measured by radioimmunoassay (RIA) Determination of progesterone production by RIA and of steroids by fluorometry showed comparable results Therefore,...
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DO YOU FACE THESE CULTURE CHALLENGES IN YOUR COMPANY OR TEAM?by Richard Parkes Cordock SMASHWORDS EDITIONCopyright © Richard Parkes Cordock 2012 First Published 2012 by ELW Publishing Bath, UKThank you for downloading this free ebook. You are welcome potx
... management team want customers to receive Solution: By using Enterprise LEADER as a vehicle for change, the senior management team (supported by middle management) are able to explain to employees ... morale and engagement could be stronger You know communication and collaboration could be more free flowing within your company You know you could provide a more remarkable customer experience ... team You know your company's vision, values, goals and purpose are not fully understood and shared by all your employees You know this disconnect is hurting your company's performance As a CEO, SVP,...
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Báo cáo khoa học: Bacitracin inhibits the reductive activity of protein disulfide isomerase by disulfide bond formation with free cysteines in the substrate-binding domain pptx
... produced by certain strains of Bacillus licheniformis and Bacillus subtilis, is a mixture of at least 22 structurally related peptides, which can be separated by RP-HPLC and characterized by MS ... gel matrix and analyzed by MALDI-TOF ⁄ TOF MS The PDI–bacitracin was characterized by a combination of in-source decay and CID-TOF ⁄ TOF MS, based on the method described by Kleffmann et al [29] ... contribute to catalysis of disulfide isomerization by protein-disulfide isomerase J Biol Chem 278, 7154–7159 Byrne LJ, Sidhu A, Wallis AK, Ruddock LW, Freedman RB, Howard MJ & Williamson RA (2009)...
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Characterization of tin catalyzed silicon nanowires synthesized by the hydrogen radical assisted deposition method
... analyzed by a scanning transmission electron microscopy (S-TEM) and an energy dispersive X-ray spectrometer (EDS) Results and discussion Before synthesis of silicon nanowires (SiNWs), hydrogen radical ... introduced by Wagner et al to growth single crystalline silicon [9] A typical VLS growth starts with the dissolution of gaseous reactants into a nano-size metal liquid droplet, followed by nucleation ... Sn nanoparticles are pushed away from the substrate by continuous Si source feeding in the liquid–solid interface and it is lifted upward by the growing SiNWs As a result, large quantities of...
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