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
Ngày tải lên :
16/03/2014, 14:20
... 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 ... 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 ... isother-
mal titration calorimetry revealed that the association constant of GA and
c-CD is 10
5
)10
6
m
)1
with favorable enthalpy and entropy changes. The
heat 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
Ngày tải lên :
31/03/2014, 09:20
... 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 ... alpha-
(3,4-dihydroxyphenyl)-lactic acid. Biochem. J. 277, 849–853.
35. Land, E.J. & Riley, P.A. (2000) Spontaneous redox reactions of
dopaquinone and the balance between the eumelanic and phaeo-
melanic ... 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...
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Báo cáo y học: Esterified Hyaluronic Acid and Autologous Bone in the Surgical Correction of the Infra-Bone Defects"
Ngày tải lên :
03/11/2012, 11:35
... 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
Ngày tải lên :
10/04/2013, 21:05
... 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
Ngày tải lên :
09/02/2014, 00:08
... (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
àg -carotene/g FW in extracted samples of aril and mesocarp,
respectively, and 16 and 9 àg/g of zeaxanthin and 35 and 2
àg/g of -cryptoxanthin in ... 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...
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Tài liệu Báo cáo khoa học: Marine toxins and the cytoskeleton: okadaic acid and dinophysistoxins pptx
Ngày tải lên :
18/02/2014, 14:20
... 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) 60606066 ê 2008 The Authors Journal compilation ê 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...
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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
Ngày tải lên :
19/02/2014, 16:20
... cyanide
binding, redox potential and auto-oxidation rates of
Ec DOS PAS, and catalytic activities of full-length
enzymes. We found that the mutations at Asp40 markedly
altered t he redox potential and auto-oxidation ... axial ligand f or the F e(II)
complex trans to His77 [4,5]. The haem redox potential
value 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 tic
activities of Ec DOS. Breakage of the salt bridge between
Asp40 and Arg85, and t he hydrogen bond network
consisting...
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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
Ngày tải lên :
21/02/2014, 01:21
... 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 ... endogalactanases (between 21% and 28%
amino acid sequence identity). This is illustrated by a
CLUSTALW analysis [29] of the deduced amino acid
sequences of GALA and b-1,4-endogalactanases of
Aspergillus...
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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
Ngày tải lên :
07/03/2014, 12:20
... (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...
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Báo cáo khóa học: Characterization of Mesorhizobium huakuii lipid A containing both D-galacturonic acid and phosphate residues ppt
Ngày tải lên :
07/03/2014, 15:20
... protons and protons from a, b and c positions of 3-hydroxy fatty acids are marked with;
-CH ẳ 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...
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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
Ngày tải lên :
08/03/2014, 09:20
... 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...
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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
Ngày tải lên :
17/03/2014, 10:20
... 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)...
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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
Ngày tải lên :
23/03/2014, 04:21
... 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...
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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
Ngày tải lên :
23/03/2014, 15:21
... 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 ... Clarke,J.D.,Volko,S.M.,Ledford,H.,Ausubel,F.M.&Dong,
X. (2000) Roles of salicylic acid, jasmonic acid, and ethylene in
cpr-induced resistance in Arabidopsis. Plant Cell 12, 21752190.
22. Strompen,G.,Gru
ă
ner,...
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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
Ngày tải lên :
31/03/2014, 09:20
... (part of loop D, linking b-strands 4
and 5) and bG430–bV434 (part of loop E, linking b strands
5 and 6) were identified as redox- sensitive regions, regulated
by 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 of
the forward and ... The
beginning and end of loop D (excluding a5)
and E are P403-V411 and M427-G433,
respectively. The illustration was prepared
using the software
MOLMOL
[26].
Fig. 2. The amino -acid sequence of ecIII and...
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