titration oxalic acid and sodium hydroxide

... as hydrogen bond and hydrophobic contacts and hydra- tion upon binding on thermodynamics and its correla- tion with structure. These analyses may help us to generally understand the molecular ... Kurihara Y (1969) Antisweet activity of gymnemic acid A1 and its derivatives. Life Sci 8, 537–543. 3 Yoshioka S (1986) Inhibitory effects of gymnemic acid and an extract from the leaves of Zyzyphus ... glycer- aldehyde-3-phosphate dehydrogenase and induce a smearing of its electrophoretic band and dephosphoryla- tion. FEBS Lett 579, 4333–4336. Interaction of gymnemic acid with cyclodextrins Y. Izutani...

Ngày tải lên: 16/03/2014, 14:20

Ngày tải lên: 07/07/2014, 00:20

... 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...

Ngày tải lên: 03/11/2012, 11:35

... 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 ngậm 2 phân...

Ngày tải lên: 10/04/2013, 21:05

... (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 ( 15.2 µg β-carotene/g FW in extracted samples of aril and mesocarp, respectively, and 16 and 9 µg/g of zeaxanthin and 35 and 2 µg/g of β-cryptoxanthin ... of Vitamin E and omega-3 fatty acids (21), although our data show only 0.3-0.8% linolenic acid (Table 2). Seeds of tropical plants may contain high levels of saturated fatty acids, with palmitic acid...

Ngày tải lên: 09/02/2014, 00:08

... residues and loss of cell–cell contacts induced by calyculin A and okadaic acid in human 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 cytoskeleton FEBS Journal 275 (2008) 6060–6066 ª 2008 The Authors Journal compilation ª 2008 FEBS 6065 MINIREVIEW Marine toxins and the cytoskeleton: okadaic acid and ... 2008) doi:10.1111/j.1742-4658.2008.06711.x Okadaic acid (OA) and its analogs, the dinophysistoxins, are potent inhibi- tors of protein phosphatases 1 and 2A. This action is well known to cause diarrhea and gastrointestinal...

Ngày tải lên: 18/02/2014, 14:20

... amino acid sequence of GALA revealed very high similarity to the endogalactanases of A. tubingensis (95.7% amino acid sequence identity) and A. aculeatus (78.9% amino acid sequence identity) and ... min D -galactose, D -galactobiose and D -galactotetraose were used as standards to identify the D -galactose and D -galacto-oligosaccharides. The calculated areas for D -galactose and D -galacto-oligosaccharides ... column and a Dionex ED40 Electrochemical Detector in de Pulsed Amperometric Detection mode. The samples were analyzed using a linear gradient of 0–400 m M sodium acetate in 100 m M sodium hydroxide...

Ngày tải lên: 21/02/2014, 01:21

... (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-xylose FEBS ... for the production of UDP-glucuronic acid via myoinositol has also been identified and characterized. Synthesis of UDP-glucuronic acid and UDP-xylose T. Oka and Y. Jigami 2646 FEBS Journal 273 ... UDP-d-glucuronic acid (UDP-GlcA) and UDP-d-xylose (UDP-Xyl) in the synthesis of cell wall polysaccharides and for attachment Keywords Saccharomyces cerevisiae; UDP-glucuronic acid; UDP-glucuronic acid decarboxylase; UDP-glucose...

Ngày tải lên: 07/03/2014, 12:20

... protons and protons from a, b and c positions of 3-hydroxy fatty acids are marked with; -CH ¼ CH-, -CH 3 ,and- CH 2 -, a, b and c, respectively. CHCl 3 ,DMSOandH 2 O represent signals from solvents and ... 3-OH-i-13:0 and two 3-OH-20:0 acids, as well as two ester-bound acids (e.g. 20:0 and 27-OH-28:0). This is merely one possible explanation due to the fact that numerous 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 also galacturonic acid and phosphate residues. The presence...

Ngày tải lên: 07/03/2014, 15:20

... 5-hydroperoxyeicosatetraenoic acid derived from arachidonic acid in ACTH-stimulated steroidogenesis in rat adrenal 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 of steroidogenesis and both the expression and function of StAR [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 that...

Ngày tải lên: 08/03/2014, 09:20

... the mutual effects of pH and NaCl on the bimolecular association rate constant of O 2 rebinding and the quantum yield of BR for the a and b subunits within the liganded dimer and tetramer of hemoglobin ... for the last ligand binding step: K t ¼ K 1 Á K 2 K 1 þ K 2 ð5Þ Here, K 1 and K 2 correspond to the affinity of O 2 bind- ing to the a and b subunits within the triliganded (monoliganded) tetramer ... chloride on oxygenation of liganded human hemoglobin Oxygen affinities of the a and b subunits Sergei V. Lepeshkevich and Boris M. Dzhagarov Institute of Molecular and Atomic Physics, National...

Ngày tải lên: 16/03/2014, 14:20

... ribitol teichoic 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 afforded glucose and ribitol ... 3-deoxy- D - glycero - D - galacto -non-2- ulopyranosonic acid, a teichuronic acid, and a b-glucosylated ribitol teichoic acid in the cell wall of plant pathogenic Streptomyces sp. VKM Ac-2124 Alexander S. Shashkov 1 , Larisa ... ribitol teichoic acid from Table 2. 1 H 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)...

Ngày tải lên: 17/03/2014, 10:20

... analogues and other longer ligands are required to establish the mechanism of ligand binding and product formation. Ascorbic acid inhibits the functional activity of HylP2 Ascorbic acid has previously ... near the b-strands, b4 and b5, and the interactions involve residues AspA151, GlyB165 and LysB166. At least six hydrogen bonds have 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 two complexes with ascorbic acid and lactose have been determined. HylP2 folds...

Ngày tải lên: 23/03/2014, 04:21

... 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 NPR1 induce the recruitment ... Salicylic acid is not required for Cf-2-andCf-9-dependent resistance of tomato to Cladosporium fulvum. Plant J. 23, 305–318. 44. Lam, E. & Lam, Y.K P. (1995) Binding site requirements and differential ... obtained from the German Collection of Microorgan- isms and Cell Cultures, Braunschweig, and grown in mineral medium with the addition of 0.05% sodium salicylate according to the instructions of the...

Ngày tải lên: 23/03/2014, 15:21

... free a-hydroxyhaem rapidly dimerized and subsequently aggre- gated and precipitated and that reduction of ferric a-hydroxyhaem by sodium dithionite reversed this aggre- gation and consequently facilitated ... decrea- ses in absorbance at 400, 535 and 690 nm took place and broad bands appeared at 431 and 795 nm (Fig. 4A, spectrum a). The absorption around 795 nm initially increased and then decreased during the ... immediately (spectrum a, –) and after 1-h incubation (spectrum b, - - -). (B) Spectra were recorded immediately (–), and at 30 min, 1 h (ÆÆÆ) ,and2 h( ) after addition of 1.4 eq of sodium dithionite (54...

Ngày tải lên: 23/03/2014, 21:20

... occur. The same seems to hold for 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. crassa tyrosinase ... 2,3-dihydroxybenzoic acid and 2,5-dihydroxybenzoic acid [18], although in this case the results are controversial, as these compounds should be poor substrates for tyrosinase. On the other hand, 3,4- dihydroxybenzoic ... (curve 1) and its equimolar mixture with amino-(3,4-dihydroxyphenyl)methyl phosphonic acid (curve 2) by tyrosinase. The reaction volume was 9 mL and con- tained 0.1 m M of each substrate and 69...

Ngày tải lên: 31/03/2014, 09:20

Ngày tải lên: 05/05/2014, 08:42

Ngày tải lên: 18/06/2014, 15:20

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Ngày tải lên: 29/06/2014, 13:20