effect of ph on absorption spectrum of sulfanilamide
Research report: "To study the effect of substituents on the properties of aniline by the method of approximate quantum AM1" pps
Ngày tải lên :
23/07/2014, 13:21
... A.; Serjeant, E. P. Ionization Constants of Acids and Bases; Methuen:
London, 1962.
[10] David R.Lide, CRC Handbook of Chemistry and Physics, 75 ed, CRC press,
London (1994), 9-50.
Tóm tắt ... Correlation of the pKa value with the Hammett σ constants of the
substituents.
Table 3 lists correlation coefficients between Hammett σ constants and bond
length C-N, negative charge on atom ... electronic influences of substituents on chemical reactions and
equilibria. Accordingly, it is reasonable to expect that they might also provide a
reliable measure of the substituent’s effects on...
- 6
- 375
- 0
Báo cáo khoa học: The effect of pH on the initial rate kinetics of the dimeric biliverdin-IXa reductase from the cyanobacterium Synechocystis PCC6803 pptx
Ngày tải lên :
23/03/2014, 05:22
... but
keeping the NADPH concentration constant at nonsat-
urating (10 lm) and saturating (1 mm) levels of
NADPH and varying the biliverdin concentration in
the range 0.5–10 lm. A concentration of 1 mm was
used ... of sBVR-A and to conduct
these experiments under a range of conditions, includ-
ing temperature, pH and the presence or absence of
phosphate, because this has such a pronounced activat-
ing effect ... be associated with an
ionizing residue that is involved in binding the 2Â-phos-
phate of NADPH.
The effect of pH on the initial rate kinetics is consis-
tent with two ionizing groups in the enzyme...
- 12
- 508
- 0
Báo cáo y học: "Effect of antibodies on the expression of Plasmodium falciparum circumsporozoite protein gene"
Ngày tải lên :
02/11/2012, 10:14
... antibody concentration. The number of mature
liver schizonts increased up to 150% in the presence of
mAbs anti-CSP of P. yoelii, which were suppressive at
higher concentrations. Contradictory effects ... inhibitory effect [7]. The number
of mature liver schizonts increased in the presence of mAbs
anti-CSP of P. yoelii and the authors suggested that
enhancement of infection could be a consequence of ... important role in the control of malaria infection. However, they can modulate
parasite development enhancing infection. The effect of anti-Plasmodium antibodies on the expression of
circumsporozoite...
- 4
- 524
- 0
Tài liệu Báo cáo Y học: The effects of low pH on the properties of protochlorophyllide oxidoreductase and the organization of prolamellar bodies of maize (Zea mays) pot
Ngày tải lên :
22/02/2014, 04:20
... Magnification bar
200 nm.
Fig. 8. NADPH concentration dependence of the photoconversion of
PChlide to Chlide of PLB suspended in pH 6.5 assay medium. (A)
Changes in percentage photoconversion in response ... by measuring the NADPH dependence of the photo-
conversion of PLB at pH 6.5. Plots of the extent of
photoconversion in response to a single saturating flash, and
to a series of such flashes separated ... form of
a phosphorylated (or possibly adenylated) ternary complex
of POR, its substrate PChlide, and NADPH. Dephospho-
rylation of the photoconverted form of this complex by an
endogenous phosphatase,...
- 11
- 637
- 0
ẢNH HƯỞNG CỦA ĐỘ KIỀM LÊN QUÁ TRÌNH TĂNG TRƯỞNG CỦA TÔM THẺ CHÂN TRẮNG (Penaeus vannamei) ĐƯỢC NUÔI Ở ĐỘ MẶN THẤP (4‰) EFFECT OF ALKALINITY ON GROWTH PERFORMANCE OF WHITE LEG SHRIMP (Peneaus vannamei) CULTURED IN LOW SALINITY AREA (4‰)
Ngày tải lên :
07/03/2014, 01:33
... entitled Effect of alkalinity on growth performance of white leg
shrimp (Peneaus vannamei) cultured in low salinity environment (4‰)” was carried out at
hatchery lab’s Faculty of Fisheries, Nong ... fluctuated between 68.3 and 77.5%, food conversion rate
was spent from 1.16 to1.50 and feed intake was consumed from 0.11 to 0.13 g/day.
To conclude, concentration of alkalinity ranged from 40 to ... tra bằng khúc xạ kế.
pH được đo bằng máy đo pH- 5011A. Hàm lượng ammonia tổng số được kiểm tra bằng test
Sera Amonium / Ammoniak và độ kiềm được đo bằng test Sera KH. Trong suốt quá trình
nuôi,...
- 9
- 1.1K
- 8
Báo cáo khoa học: Dissociation/association properties of a dodecameric cyclomaltodextrinase Effects of pH and salt concentration on the oligomeric state pot
Ngày tải lên :
07/03/2014, 12:20
... These data indicated that the
effect of pH on dissociation of the oligomer was mainly
due to the protonation of a single residue rather than a
global effect of pH on the protein. In agreement ... that the effect of salts on the
oligomeric state of CDase I-5 correlated with the
dissociation of the dodecameric form of the enzyme.
In conclusion, dimerization or oligomerization is a
physical ... of cyclomaltodextrinase
I-5 (CDase I-5) as a function of pH and salt concentration, the dissoci-
ation/association processes of the enzyme were investigated under various
pH and salt conditions....
- 13
- 511
- 0
The Effect of Aesthetic on the Usability of Data Visualization pdf
Ngày tải lên :
07/03/2014, 17:20
... task abandonment and latency of
erroneous response. Our findings demonstrate a
correlation between latency in task abandonment and
erroneous response time in relation to visualization’s
perceived ... "A Conceptual
Model for Evaluating Aesthetic Effect within the
User Experience of Information Visualization," in
Tenth International Conference on Information
Visualisation (IV'06) ... completion time measurements
are well known in data visualization evaluations [11, 14].
Task abandonment is a metric of usability primarily
11th International Conference Information Visualization...
- 9
- 657
- 1
Effects of ph on cd and zn uptake by plant
Ngày tải lên :
16/03/2014, 00:07
... accounts
for the effect of pH of exposure, 24% of the
variation was described. Adding the term which
accounts for the effect of pH of acclimation de-
scribed 36% of the variation in zinc uptake. Consid-
ering ... the
effect of the pH of acclimation (pH
accl
) described
38% of the variation in cadmium uptake. Consid-
ering only the results of the cadmium uptake
experiments performed at the pH of acclimation
(i.e. ... analy-
sis of variance of the data showed that both the
effect of the pH of exposure and the pH of
acclimation on Cd uptake are highly significant
(Table 2a).
Fig. 3 shows the results of the effect of...
- 13
- 374
- 0
Báo cáo "The dependence of the nonlinear absorption coefficient of strong electromagnetic waves caused by electrons confined in rectangular quantum wires on the temperature of the system" doc
Ngày tải lên :
22/03/2014, 11:20
... creation (annihilation) operator of
an electron,
q
b
+
r
(
q
b
r
) is the creation (annihilation) operator of a phonon for a state having wave vector
q
r
,
q
C
r
is the electron-phonon interaction ... absorption
coefficient of a strong EMW by confined electrons in RQW on the temperature T of the system. The
problem is considered in two cases: electron-optical phonon scattering and electron-acoustic ... independent component of the phonon (electron) distribution function,
()
k
Jx
is Bessel function, the quantity
δ
is infinitesimal and appears due to the assumption of an
adiabatic interaction of the...
- 6
- 414
- 2
Báo cáo khoa học: Effect of heliquinomycin on the activity of human minichromosome maintenance 4/6/7 helicase pdf
Ngày tải lên :
23/03/2014, 04:21
... 3. Effect of heliquinomycin on the RNA priming activity of the
DNA polymerase-a/primase complex. (A) Top: effect of increasing
concentrations of heliquinomycin (HQ) on the RNA priming action
of ... 43
(μM)
HQ
17-mer
17-mer/M13
Fig. 2. Effect of heliquinomycin on DNA helicase activity. (A) Top:
effects of increasing concentrations of heliquinomycin (HQ) on the
DNA helicase activities of the MCM4/6/7 complex ... of the values was plotted together with
error bars. (B) Effect of increasing concentrations of heliquinomycin
on the DNA polymerization activity of the DNA polymerase-a/prim-
ase. The reaction...
- 10
- 538
- 0
báo cáo hóa học: "Effect of step-synchronized vibration stimulation of soles on gait in Parkinson''''s disease: a pilot study" doc
Ngày tải lên :
19/06/2014, 10:20
... enhanced feedback was
synchronized with the distribution of plantar pressures
during the gait cycle phase. Therefore, the synchroniza-
tion of vibration stimulation with the gait phase may
improve timing ... Access
Research
Effect of step-synchronized vibration stimulation of soles on gait in
Parkinson's disease: a pilot study
Peter Novak*
1
and Vera Novak
2
Address:
1
Department of Neurology, Boston ... clin-
ical value of the S-VS.
Abbreviations
PD Parkinson's disease
S-VS step-synchronized vibration stimulation
VD vibratory device
CV coefficient of variation
CoP center of pressure
UPDRS...
- 7
- 497
- 0
báo cáo hóa học: " The effect of consequent exposure of stress and dermal application of low doses of chlorpyrifos on the expression of glial fibrillary acidic protein in the hippocampus of adult mice" pptx
Ngày tải lên :
20/06/2014, 00:20
... The effect of consequent exposure of
stress and dermal application of low doses of chlorpyrifos on the
expression of glial fibrillary acidic protein in the hippocampus of adult
mice. Journa l of ... of Occupational Medicine and Toxicology 2011, 6:4
http://www.occup-med.com/content/6/1/4
Page 9 of 9
RESEARCH Open Access
The effect of consequent exposure of stress and
dermal application of ... Effect of concurrent application of
heat, swim stress and repeated dermal application of chlorpyrifos on
the hippocampal neurons in mice. Folia Neuropathol 2009, 47(1):60-68.
9. Gordon CJ, Leon LR:...
- 9
- 451
- 0
báo cáo hóa học:" Direct effects of caffeine on osteoblastic cells metabolism: the possible causal effect of caffeine on the formation of osteoporosis" doc
Ngày tải lên :
20/06/2014, 00:20
... were
purchased and diluted in phosphate buffered solution
(Sigma, St. Louis, MO, USA). In the first part of this study,
the effects of various concentrations of caffeine on bone
cell activities were ... relaxation of
smooth muscle [23]. The effects of coffee on bone metab-
olism are still controversial, although several studies have
suggested that caffeine and/or heavy coffee consumption
are ... inflammation and systemic bone loss: a model for
inflammation-induced bone disease. J Bone Miner Res 1993,
8:625-634.
33. Fuller K, Chambers TJ: Effect of arachidonic acid metabolites on
bone resorption...
- 10
- 443
- 0
Báo cáo hóa học: " Research Article On the Spectrum of Almost Periodic Solution of Second-Order Neutral Delay Differential Equations with Piecewise Constant of Argument" ppt
Ngày tải lên :
21/06/2014, 20:20
... Statement of Main Theorem
We begin this section with a definition of the solution of 1.1.
Definition 2.1. A continuous function x : R → R is called a solution of 1.1 if the following
conditions are ... to a contradiction. The claim follows.
14 Advances in Difference Equations
12 R. Yuan, On the spectrum of almost periodic solution of second-order differential equations with
piecewise constant ... Yuan, On the spectrum of almost periodic solution of second order scalar functional differential
equations with piecewise constant argument,” Journal of Mathematical Analysis and Applications,...
- 14
- 335
- 0
Báo cáo hóa học: " A pH sensor based on electric properties of nanotubes on a glass substrate" pptx
Ngày tải lên :
22/06/2014, 18:20
... mm. As for controlling the solution pH,
10 micro L of the solution was suctioned using a pipette;
then 10 micro L of the other pH solution was added. The
pH of the suctioned solution was measured ... from –0.55 V to –0.15 V.
Effects of the pH on I
ds
were measured dropping various
pH of 10 mM phosphate buffer on the CNT device:
20 micro L of the buffer was dropped on the CNT and the
Ag/AgCl ... CNT-FET device on the glass
substrate
We also investigated the effect of pH on the SWCNT-FET
device because aggregation of the aqueous SWCNT dis-
persion is controllable by changing the pH. For this
experiment,...
- 6
- 346
- 0
![Báo cáo lâm nghiệp: "Effect of initial height of seedlings on the growth of planting material of Norway spruce (Picea abies [L.] Karst.) in mountain conditions" ppsx](https://media.store123doc.com/images/document/2014_08/07/medium_kdi1407381717.jpg)