methanol and formic acid smell
Báo cáo hóa học: " Facile template-free synthesis of pine needle-like Pd micro/nano-leaves and their associated electro-catalytic activities toward oxidation of formic acid" pot
Ngày tải lên :
21/06/2014, 03:20
... activity for formic acid electro-oxidation.
Experimental
Materials and apparatus
PdCl
2
(Shanghai Sinopharm Chemicals Reagent Co.,
Ltd., China) was used as received. Formic acid, H
3
PO
4
,
and H
2
SO
4
were ... the study and revised the
manuscript, and conducted coordination. PY, CW, and JX gave the advice
and guide for the experimental section and edited the manuscript. All
authors read and approved ... lowest onset
potential and the highest current density of formic
acid oxidation. This demonstrates that the electrocata-
lytic stability of the Pd micro/nano-leaves for formic
acid oxidation is much...
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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 ... 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 ... shikimic acid that it more simple and
economic than Payne and Edmonds method. In
this study, we used methanol : water (8:2)
extraction to remove impurities from the crude
shikimic acid, while...
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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 ... Complementation
analysis suggested that the dfp-1 and dfp-707 mutations
were in the same gene [14]. The nutritional requirements of
the dfp-707 and dfp-1 mutants correspond to those of panD
mutants, however, dfp-mutants...
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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
... 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 ... 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 ... 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...
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- 1
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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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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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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Báo cáo khoa học: Binding of hemolin to bacterial lipopolysaccharide and lipoteichoic acid An immunoglobulin superfamily member from insects as a pattern-recognition receptor doc
Ngày tải lên :
31/03/2014, 09:20
... the O-antigen
and p arts of the i nner-core and outer-core p olysaccharide,
and lipid A alone could also p artially compete f or hemolin
binding to smooth LPS. Rough mutants Rd and Re,
containing ... suggesting that LPS and
LTAbindtothesamesitesonhemolinandthathemolin
may have a higher affinity for LTA. Hemolin was also
observed to bind d irectly to i mmobilized LTA (Fig. 10).
LPS and LTA are s ... micro-organis ms.
We showed that hemolin binds to the surface of Gram-
negative and Gram-positive bacteria and yeast, and
caused aggregation of these micro-organisms. Binding
of hemolin to the surface...
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determination of methanol and ethanol
Ngày tải lên :
26/05/2014, 17:25
... air contaminants,
over retention of methanol and ethanol by the
sorbent. Results for concentrations of methanol
and ethanol, measured inside and outside the lab
and at urban sites, are given in ... for
methanol and ethanol sampling. Thus, this system
was tested in real sites, by means of atmospheric
determination of ethanol and methanol in urban
places in Rio de Janeiro, Sa˜o Paulo and ... 9 mm i.d.) and florisil
(125 mm×900 mg×24 mm× 9 mm i.d.)); glass
impinger; Teflon and silicone tubes; ethanol,
methanol and acetonitrile, analytical grade
(Merck); water, distilled and further...
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- 0
Báo cáo y học: " Regulation of Sox9 activity by crosstalk with nuclear factor-κB and retinoic acid receptors" pptx
Ngày tải lên :
09/08/2014, 10:22
... factor-κB and
retinoic acid receptors
Jason S Rockel, Julie C Kudirka, Andrew J Guzi and Suzanne M Bernier
Canadian Institutes of Health Research Group in Skeletal Development and Remodeling, and ... reporter or (b) a retinoic acid response element
(RARE) reporter and treated with or without tumour necrosis factor
(TNF)-α (30 ng/ml) and/ or all-trans retinoic acid (atRA; 1, 10, or 100
nmol/l) ... relative luciferase units.
Figure 5
Effects of TNF-α and atRA on nuclear levels of NF-κB and RARαEffects of TNF-α and atRA on nuclear levels of NF-κB and RARα.
Chondrocytes were treated with or without...
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Báo cáo sinh học: " Ethanol and acetic-acid tolerance in Indian geographical populations of Drosophila immigrans" pps
Ngày tải lên :
09/08/2014, 18:21
...
(1.5-4.2%)
and
acetic -acid
tolerance
(2.9-4.9%)
were
observed
in
adult
individuals
of
4
geographical
populations
of
Drosophila
immigrans.
Thus,
both
ethanol
and
acetic -acid
tolerance ...
and
acetic
acid
seem
to
be
correlated
with
the
concentrations
of
these
2
metabolites
in
natural
food
resources.
Thus,
intra-specific
differences
for
ethanol
and
acetic -acid ...
concentrations
(1-7%)
of
ethanol
and
acetic
acid
and
the
data
on
ethanol
tolerance
indices
(LT
50
h,
LT5o
Ma
X/LT50
control,
adult
threshold
values
and
LCSO
)
are
given
in
table...
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