redox titration oxalic acid and potassium permanganate
Báo cáo khoa học: Interaction of gymnemic acid with cyclodextrins analyzed by isothermal titration calorimetry, NMR and dynamic light scattering doc
... ashydrogen bond and hydrophobic contacts and hydra-tion upon binding on thermodynamics and its correla-tion with structure. These analyses may help us togenerally understand the molecular ... glycer-aldehyde-3-phosphate dehydrogenase and induce asmearing of its electrophoretic band and dephosphoryla-tion. FEBS Lett 579, 4333–4336.Interaction of gymnemic acid with cyclodextrins Y. Izutani ... isother-mal titration calorimetry revealed that the association constant of GA and c-CD is 105)106m)1with favorable enthalpy and entropy changes. Theheat capacity change was negative and large,...
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Báo cáo khoa học: Redox reaction between amino-(3,4-dihydroxyphenyl)methyl phosphonic acid and dopaquinone is responsible for the apparent inhibitory effect on tyrosinase doc
... occur. The same seems to holdfor the derivatives of mandelic acid: 3,4-dihydroxymandelic acid is oxidized by tyrosinase, whereas 4-hydroxymandelic acid is not [24]. Although the studies with N. crassatyrosinase ... alpha-(3,4-dihydroxyphenyl)-lactic acid. Biochem. J. 277, 849–853.35. Land, E.J. & Riley, P.A. (2000) Spontaneous redox reactions ofdopaquinone and the balance between the eumelanic and phaeo-melanic ... 2,3-dihydroxybenzoic acid and 2,5-dihydroxybenzoic acid [18], although in this case theresults are controversial, as these compounds should bepoor substrates for tyrosinase. On the other hand, 3,4-dihydroxybenzoic...
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Báo cáo y học: Esterified Hyaluronic Acid and Autologous Bone in the Surgical Correction of the Infra-Bone Defects"
... was elevated and the granulation tissue was removed showing the true extension and depth of the infra-bone defect. Debridement and root preparation were carried out with hand and ultrasonic ... by EHA and autologous grafting, 4 males and 5 females, all non smokers, with a mean age of 43,8 years for females, 40,0 years for males and 42 years for all the group, in good health and with ... immediately before treatment and at 10 days, and 6, 9, and 24 months after treatment. Clinical Measurements To assess the treatment results, the following pre-operative and intra-operative clinical...
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ứng dụng chất kích kháng CuCl2 và Oxalic Acid
... 2.7: Hiệu quả kích kháng của oxalic acid lên tỉ lệ diện tích vết bệnh trên lá (%) ở các thời điểm 40, 50 và 60 NSKS 42 Hình 2.8: Hiệu quả kích kháng của oxalic acid lên tỉ lệ bệnh thối cổ bông ... 2.13: Hiệu quả kích kháng của oxalic acid lên tỉ lệ diện tích vết bệnh trên lá (%) ở các thời điểm 40, 50 và 60 NSKS 50 Hình 2.14: Hiệu quả kích kháng của oxalic acid lên tỉ lệ bệnh thối cổ bông ... 2001) và mô học (Huỳnh Minh Châu và ctv,2001). 6. Đặc tính oxalic acid và tác động của nó đối với cây trồng Tên hóa học: OXALIC ACID Công thửc hóa học: Thường tồn tại ở dạng ngm 2 phõn t...
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THÀNH PHẦN hợp CHẤT AXÍT béo và CAROTENOID của gấc fatty acid and carotenoid composition of gac (momordica cochinchinensisspreng) fruit
... (9%), and palmitic (5-6%)acids, and trace amounts of arachidic, cis-vaccenic, linolenic, and palmitoleic, eicosa-11-enoic acids, and eicosa-13-enoic (in one fruit only) acids.KEYWORDS:Momordica ... authors also reported 101 ( 38 and 22.1 ( 15.2àg -carotene/g FW in extracted samples of aril and mesocarp,respectively, and 16 and 9 àg/g of zeaxanthin and 35 and 2àg/g of -cryptoxanthin in ... ofVitamin E and omega-3 fatty acids (21), although our data showonly 0.3-0.8% linolenic acid (Table 2).Seeds of tropical plants may contain high levels of saturatedfatty acids, with palmitic acid...
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Tài liệu Báo cáo khoa học: Marine toxins and the cytoskeleton: okadaic acid and dinophysistoxins pptx
... residues and loss of cell–cellcontacts induced by calyculin A and okadaic acid inhuman epidermal cells. Exp Cell Res 231, 163–172.16 Pasdar M, Li Z & Chan H (1995) Desmosome assembly and disassembly ... Vale and L. M. Botana DSPs and the cytoskeletonFEBS Journal 275 (2008) 60606066 ê 2008 The Authors Journal compilation ê 2008 FEBS 6065 MINIREVIEWMarine toxins and the cytoskeleton: okadaic acid and ... 2008)doi:10.1111/j.1742-4658.2008.06711.xOkadaic acid (OA) and its analogs, the dinophysistoxins, are potent inhibi-tors of protein phosphatases 1 and 2A. This action is well known to causediarrhea and gastrointestinal...
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Tài liệu Báo cáo khoa học: Critical roles of Asp40 at the haem proximal side of haem-regulated phosphodiesterase from Escherichia coli in redox potential, auto-oxidation and catalytic control doc
... cyanidebinding, redox potential and auto-oxidation rates ofEc DOS PAS, and catalytic activities of full-lengthenzymes. We found that the mutations at Asp40 markedlyaltered t he redox potential and auto-oxidation ... axial ligand f or the F e(II)complex trans to His77 [4,5]. The haem redox potentialvalue was decreased from +67 mV vs. SHE (wild-type) to)26, )1, and )122 mV in t he Met95Ala, M et95Leu and Met95His ... mutations at Asp40 markedly alter the redox pot entials, auto-oxidation ra tes and cataly ticactivities of Ec DOS. Breakage of the salt bridge betweenAsp40 and Arg85, and t he hydrogen bond networkconsisting...
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Tài liệu Báo cáo Y học: The b-1,4-endogalactanase A gene from Aspergillus niger is specifically induced on arabinose and galacturonic acid and plays an important role in the degradation of pectic hairy regions pdf
... amino acid sequence of GALA revealed veryhigh similarity to the endogalactanases of A. tubingensis(95.7% amino acid sequence identity) and A. aculeatus(78.9% amino acid sequence identity) and ... minD-galactose,D-galactobiose and D-galactotetraose were used as standards to identify theD-galactose and D-galacto-oligosaccharides. The calculatedareas forD-galactose and D-galacto-oligosaccharides ... endogalactanases (between 21% and 28%amino acid sequence identity). This is illustrated by aCLUSTALW analysis [29] of the deduced amino acid sequences of GALA and b-1,4-endogalactanases ofAspergillus...
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Báo cáo khoa học: Reconstruction ofde novopathway for synthesis of UDP-glucuronic acid and UDP-xylose from intrinsic UDP-glucose inSaccharomyces cerevisiae pptx
... (UDP-Xyl) and UDP-D-glucuronic acid (UDP-GlcA) were 7.4 min, 7.8 min and 11.8 min,respectively, under identical assay conditions.T. Oka and Y. Jigami Synthesis of UDP-glucuronic acid and UDP-xyloseFEBS ... forthe production of UDP-glucuronic acid viamyoinositol has also been identified and characterized.Synthesis of UDP-glucuronic acid and UDP-xylose T. Oka and Y. Jigami2646 FEBS Journal 273 ... UDP-d-glucuronic acid (UDP-GlcA) and UDP-d-xylose (UDP-Xyl) in thesynthesis of cell wall polysaccharides and for attachmentKeywordsSaccharomyces cerevisiae; UDP-glucuronic acid; UDP-glucuronic acid decarboxylase;UDP-glucose...
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Báo cáo khóa học: Characterization of Mesorhizobium huakuii lipid A containing both D-galacturonic acid and phosphate residues ppt
... protons and protons from a, b and c positions of 3-hydroxy fatty acids are marked with;-CH ẳ CH-, -CH3 ,and- CH2-, a, b and c, respectively. CHCl3,DMSOandH2O represent signals from solvents and ... 3-OH-i-13:0 and two 3-OH-20:0 acids, aswell as two ester-bound acids (e.g. 20:0 and 27-OH-28:0).This is merely one possible explanation due to the fact thatnumerous combinations of fatty acids different ... 2,3-diamino-2,3-dideoxyglucose(DAG) and a complex set of fatty acids (both ester and amide bound), as described previously [24], but alsogalacturonic acid and phosphate residues. The presence...
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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
... 5-hydroperoxyeicosatetraenoic acid derivedfrom arachidonic acid in ACTH-stimulated steroidogenesis in ratadrenal glands. J. Endocrinol. 125, 89–96.23. Wang, X. & Stocco, D.M. (1999) Cyclic AMP and arachidonic acid: ... [12–16].Several reports have shown that arachidonic acid (AA) and its metabolites play an essential role in the regulation ofsteroidogenesis and both the expression and function ofStAR [17–26]. Adrenal cholesterol ... vivo.Comparisonoflowandhighdensitylipopro-teins of human and rat origin. J. Biol. Chem. 256, 7362–7370.Ó FEBS 2002 Acyl-CoA thioesterases and synthetase on steroidogenesis (Eur. J. Biochem. 269) 5607 and...
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Báo cáo Y học: A polymer with a backbone of 3-deoxy-D-glycero -D-galacto -non-2ulopyranosonic acid, a teichuronic acid, and a b-glucosylated ribitol teichoic acid in the cell wall of plant pathogenic Streptomyces sp. VKM Ac-2124 pdf
... ribitolteichoic acid from the cell wall of S. azureus RIA 1009[24] and based on the analysis of the products formed upon acid and enzymatic hydrolysis. Acid hydrolysis affordedglucose and ribitol ... 3-deoxy-D-glycero-D-galacto-non-2-ulopyranosonic acid, a teichuronic acid, and a b-glucosylated ribitolteichoic acid in the cell wall of plant pathogenicStreptomycessp.VKM Ac-2124Alexander S. Shashkov1, Larisa ... ribitol teichoic acid fromTable 2.1H NMR chemical shifts (d, p.p.m) for the teichuronic acid (polymer I), the Kdn-containing polymer (polymer II), and the ribitol teichoic acid (polymer III)...
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Báo cáo khoa học: Polysaccharide binding sites in hyaluronate lyase – crystal structures of native phage–encoded hyaluronate lyase and its complexes with ascorbic acid and lactose docx
... analogues and other longer ligands arerequired to establish the mechanism of ligand binding and product formation.Ascorbic acid inhibits the functional activityof HylP2Ascorbic acid has previously ... near the b-strands, b4 and b5, and the interactions involve residues AspA151,GlyB165 and LysB166. At least six hydrogen bondshave been observed between the protein and the ligand(Table 3). ... reservoir solutions containing ascorbic acid and lactose, respectively. The crystal structures of native HylP2 and its twocomplexes with ascorbic acid and lactose have been determined. HylP2folds...
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Báo cáo khoa học: Salicylic acid and the hypersensitive response initiate distinct signal transduction pathways in tobacco that converge on the as-1-like element of the PR-1a promoter pot
... binding to different TGA factors and transcriptional activation potential. Nucleic Acids Res. 30, 775–781.46. Johnson, C., Boden, E. & Arias, J. (2003) Salicylic acid and NPR1induce the recruitment ... Salicylic acid is not required for Cf-2-andCf-9-dependentresistance of tomato to Cladosporium fulvum. Plant J. 23, 305–318.44. Lam, E. & Lam, Y.K P. (1995) Binding site requirements and differential ... Clarke,J.D.,Volko,S.M.,Ledford,H.,Ausubel,F.M.&Dong,X. (2000) Roles of salicylic acid, jasmonic acid, and ethylene incpr-induced resistance in Arabidopsis. Plant Cell 12, 21752190.22. Strompen,G.,Gruăner,...
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Báo cáo khoa học: Redox-sensitive loops D and E regulate NADP(H) binding in domain III and domain I–domain III interactions in proton-translocating Escherichia coli transhydrogenase potx
... (part of loop D, linking b-strands 4 and 5) and bG430–bV434 (part of loop E, linking b strands5 and 6) were identified as redox- sensitive regions, regulatedby the redox- state of NADP(H), that ... bD392C and bT393C in loop D, and bG430C and bA432C in loop E,were included. All loop D and E mutants, especially bI406C and bG430C, showed increased ratios between the rates ofthe forward and ... Thebeginning and end of loop D (excluding a5) and E are P403-V411 and M427-G433,respectively. The illustration was preparedusing the softwareMOLMOL[26].Fig. 2. The amino -acid sequence of ecIII and...
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Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 nội dung cụ thể cho từng kĩ năng ở từng cấp độ phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha sự cần thiết phải đầu tư xây dựng nhà máy phần 3 giới thiệu nguyên liệu chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008 chỉ tiêu chất lượng 9 tr 25