titration oxalic acid and sodium hydroxide
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 ... 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...
- 7
- 502
- 0
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...
- 7
- 769
- 0
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 ngậm 2 phân...
- 78
- 1.7K
- 13
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
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...
- 6
- 886
- 4
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) 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...
- 7
- 644
- 0
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 ... 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...
- 9
- 669
- 0
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...
- 13
- 541
- 0
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 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...
- 13
- 428
- 0
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 that...
- 9
- 470
- 0
Báo cáo khoa học: Mutual effects of proton and sodium chloride on oxygenation of liganded human hemoglobin Oxygen affinities of the a and b subunits potx
Ngày tải lên :
16/03/2014, 14:20
... 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...
- 11
- 577
- 0
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)...
- 6
- 561
- 0
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...
- 11
- 517
- 0
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 ... 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...
- 11
- 452
- 0
Báo cáo Y học: The reactivity of a-hydroxyhaem and verdohaem bound to haem oxygenase-1 to dioxygen and sodium dithionite pdf
Ngày tải lên :
23/03/2014, 21:20
... 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...
- 9
- 501
- 0
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 ... 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...
- 7
- 534
- 0
