ethanol and formic acid reaction
Tài liệu Báo cáo " Obtaining Essential Oil and Shikimic Acid from Star Anise Fruit (Illicium verum Hook) " ppt
Ngày tải lên :
12/02/2014, 17:20
... oil and
shikimic acid from star anise fruits. With this
method, obtaining yield of essential oil and
shikimic acid respectively are 9.5% and 5.6%
(essential oil content and shikimic acid ... Sciences and Technology 26 (2010) 110-113
113
for obtaining simultaneously essential oil and
shikimic acid from star anise fruits. The yield
of essential oil and shikimic acid were 9.5%
and ... as well as shikimic acid obtained
by methods N
0
1, N
0
2 and N
0
3 were shown at
table 1 and table 2.
Table 1. Obtaining simultaneously essential oil and shikimic acid
from star anise...
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Tài liệu Báo cáo khóa học: Active-site residues and amino acid specificity of the bacterial 4¢-phosphopantothenoylcysteine synthetase CoaB pptx
Ngày tải lên :
19/02/2014, 12:20
... before as important step in the biosynthesis of the
lantibiotics epidermin and mersacidin catalyzed by the
LanD enzymes EpiD and MrsD, respectively [8–10]. Flavin-
dependent oxidative decarboxylation ... N210K and
copurification of the 4¢-phosphopantothenoyl-
CMP intermediate. His-CoaB proteins
(His-CoaB and His-CoaB N210K) were puri-
fied from E. coli cell extracts by Ni-nitrilotri-
acetic acid and ... Escherichia coli and most eubacteria, the synthesis of
4¢-phosphopantetheine, which is also the key reaction in
coenzyme A biosynthesis, is catalyzed from 4¢-phospho-
pantothenate and cysteine by...
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Tài liệu Báo cáo khoa học: The SCO2299 gene from Streptomyces coelicolor A3(2) encodes a bifunctional enzyme consisting of an RNase H domain and an acid phosphatase domain pdf
Ngày tải lên :
19/02/2014, 18:20
... PIPES as an internal standard, and 2 lgof
protein samples in a final volume of 100 lL. The reaction
mixture was incubated for 10 min at 37 °C and transferred
to 400 lL cold methanol. The contents ... plates containing 50 lgÆ mL
)1
ampicillin and 30 lgÆmL
)1
chloramphenicol, and incubated
at 30 °C and 42 °C.
Plasmid constructions, overproductions and
purifications
Plasmids for overexpression ... RNase
H domain and an APase domain. The RNase H and
APase activities of the full length SCO2299 protein
depend on its N-terminal RNase H domain and C-ter-
minal APase domain, respectively, and do not...
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Tài liệu Báo cáo khoa học: The swinging movement of the distal histidine residue and the autoxidation reaction for midge larval hemoglobins docx
Ngày tải lên :
20/02/2014, 23:20
... ligand. The corresponding
spectral changes in the Soret band were therefore followed
by stopped-flow and rapid-scan techniques, and the
observed first-order rate constants of k
out
¼ 25 s
)1
and
k
in
¼ ... resistance to acidic autoxidation, we conclude
that T. akamusi hemoglobin VII, the major component, can
play an important role in O
2
transport and storage against
the extremely acidic and hypoxic ... door for ligand
entry. J. Mol. Biol. 207, 459–463.
23. Tian, W.D., Sage, J.T. & Champion, P.M. (1993) Investigations of
ligand association and dissociation rates in the ÔopenÕ and ÔclosedÕ
states...
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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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Tài liệu Báo cáo Y học: Bivalent cations and amino-acid composition contribute to the thermostability of Bacillus licheniformis xylose isomerase doc
Ngày tải lên :
22/02/2014, 07:20
... uncharged
polar amino acids (i.e. Q, N, S, and T) and an increase in
charged amino -acid residues (i.e. K, E, and R) in
hyperthermophilic proteins. As S and T can catalyze the
deamination and backbone ... The amounts of fructose and xylulose produced were
determined using the cysteine/carbazole/sulfuric acid
method. Absorbance was measured at 537 nm and 560 nm
for xylulose and fructose, respectively. ... 0.981, is based on the
elution data of the 200, 150, and 66 kDa protein standards. Linear
regressions (1) and (2) give molecular masses of 200 and 177.5 kDa,
respectively, for BLXI.
6294 C. Vieille...
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A COMPARATIVE STUDY OF THE DIAGNOSIS OF PULMONARY TUBERCULOSIS USING CONVENTIONAL TOOLS AND POLYMERASE CHAIN REACTION* pot
Ngày tải lên :
06/03/2014, 04:20
... complex
16
.
Amplification reaction was typically performed in
a 50µl reaction mix containing 0.25nmoles of
forward and reverse primers,
2mM final
concentration of dNTP, 1.5 U of Taq polymerase
in 1X buffer and proteinase ... These cases were as follows, two each
of asthma, pneumonia and cancer lung, one each of
post CABG, COPD and lung abscess and 12 with
cough and cold. All samples from these individuals
had tested ... routine
diagnostics like microscopy and culture
Table 3 presents the comparative efficiency
of PCR to diagnostics like microscopy and culture.
The sensitivity, specificity, positive and negative
predictive...
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Báo cáo khoa học: Involvement of NF-jB subunit p65 and retinoic acid receptors, RARa and RXRa, in transcriptional regulation of the human GnRH II gene pot
Ngày tải lên :
16/03/2014, 10:20
... Differential effects of ligand-activated RARa and RXRa on
the promoter activity of the hGnRH II gene in TE671 and JEG-3
cells. In vivo effect of RARa and RXRa with their ligands, ATRA
and 9-cisRA, on the ... TE671
medulloblastoma and JEG-3 placenta choriocarcinoma cells. Supershift
and chromatin immunoprecipitation assays showed in vitro and in vivo
binding of NF-jB subunit p65 and the retinoic acid receptors, RARa and
RXRa, ... PCR.
Treatment of cells with the RARa ⁄ RXRa ligands, all-trans retinoic acid
and 9-cis-retinoic acid, reduced and increased GnRH II gene expression in
TE671 and JEG-3 cells, respectively. Taken together,...
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ethanol and ozone sensing characteristics of wo3 based sensors activated by au and pd
Ngày tải lên :
19/03/2014, 16:48
... WO
3
gas sensors and multisensors and selectivity enhancement strate-
gies including PCA analysis and nose spectroscopy; and modelling of sensor
responses.
342 A. Labidi et al. / Sensors and Actuators ... metals. For that, two metals have been
chosen Pd and Au, and their effect on the sensor sensitivity
towards ozone and ethanol was studied. The DC transient and
AC responses were analyzed in order to ... Au/WO
3
and (b) Pd/WO
3
.
A. Labidi et al. / Sensors and Actuators B 120 (2006) 338–345 343
Table 2
Modeled RC for WO
3
bare, Au/WO
3
and Pd/WO
3
based sensors towards 2% of C
2
H
6
O and dry...
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low - level detection of ethanol and h2s with temperature - modulated wo3 nanoparticle gas sensors
Ngày tải lên :
20/03/2014, 13:04
... dynamic response were ex-
tracted by FFT and DWT decomposition methods, and dis-
crimination between ethanol and H
2
S measurements was
performed by PCA and DFA. DWT was found to outperform
FFT ... between 150 and 250
◦
C for all further measure-
ments.
3.2. Calibration curves for low concentrations of ethanol
and H
2
S
At first, different concentrations of ethanol (2, 5, 10, 20,
30, 40, and 50ppm) ... factors
as to minimise the variance within each class and maximise
the variance between classes [37].
The two predefined classes were ethanol and H
2
S, and
the data matrices were the same as the ones...
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Women and Adverse Drug Reactions Reporting in the Canadian Context pot
Ngày tải lên :
22/03/2014, 11:20
... or “partner” in meeting the HPB mandate; and
• a lack of new criteria for “safety”, new methods for post marketing evaluation of drugs and
devices and social and ethical evaluation of new initiatives. ... drug reactions to patients and health-care providers. The jury’s first
recommendation called on Health Canada to set up a joint body to review, improve and
standardise all communication tools and ... Abraham and Paul Taylor, “Drug reactions kill thousands: researchers”, The Globe and Mail, April 15,
1998.
46
Namrata Bains, MSc; Duncan Hunter, PhD, Adverse reporting on adverse reactions,...
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Báo cáo khoa học: Structural characterization of N-linked oligosaccharides of laminin from rat kidney: changes during diabetes and modulation by dietary fiber and butyric acid pdf
Ngày tải lên :
22/03/2014, 17:20
... neutral sugars like mannose
and galactose and amino sugar as N-acetylglucos-
amine, along with sialic acid which accounted for 22
and 35% of total carbohydrate content in SFC and
SFD groups, respectively.
Purification ... into SFC and FFC, SFD, FFD and
FFD-500 groups. SFC and SFD groups received AIN-76
basal diet, whereas FFC and FFD groups received AIN-76
diet, wherein starch was replaced with 5% wheat bran
and 2.5% ... co-distilled
with distilled water and reduced using sodium borohydride.
Excess sodium borohydride was destroyed by adding 2 m
acetic acid and again repeatedly co-distilled with methanol
and dried in a dessicator....
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Báo cáo khoa học: Glycan profiling of urine, amniotic fluid and ascitic fluid from galactosialidosis patients reveals novel oligosaccharides with reducing end hexose and aldohexonic acid residues ppt
Ngày tải lên :
29/03/2014, 09:20
... the
exception of U4 (Table 3). In U1, U6 and U7, gluconic
acid (o1) has high abundance, and high levels of C
1
-oxi-
dized lactose (o2) were observed in urine samples U2,
U5 and U6.
Discussion
Using a prototype ... Neu5Ac and the adjacent
hexose. No relevant ring fragments were observed
between C
2
and C
3
, which is consistent with a 1–3
linkage between Hex and HexNAc. The ring fragment
ions
0,2
A
4
and
2,4
A
4
, ... fragment
ions
0,2
A
4
and
2,4
A
4
, and the lack of
0,3
A
4
, are indica-
tive of a 1–4 linkage between HexNAc and the adja-
cent hexose. The ring fragment ions
0,2
A
5
,
0,2
A
5
-18
and
2,4
A
5
, and the lack of
0,3
A
5
,...
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