Total sennosides concentration is a very important factor when rhubarb and senna will be used as crude drugs. However, one-step analytical technique for total sennosides has not been reported except HPLC. An enzyme-linked immunosorbent assay (ELISA) for total sennosides concentration by using th...
This paper describes a simple, precise, and accurate HPTLC method for simultaneous quantification of sennoside A, sennoside B, and kaempferol in Cassia fistula whole plant extract. Chromatographic separation of the sample extract was performed on aluminium foil plates coated with silica gel 60 F...
The sennoside A (SA) and sennoside B (SB) contents of various samples of crude drugs were determined using solid-phase extraction (SPE) and HPLC. The samples examined were crude drugs (senna leaf, senna pods, and rhubarb), conventional crude drug products, and Kampo formulations. The sample solu...
Conversion of residue βTyr-297 of the Escherichia coli F 1 -ATPase (ECF 1 ) to a Cys in the mutant βY297C led to impaired oxidative phosphorylation based on growth curves. The ATPase activity of ECF 1 isolated from the mutant βY297C was only 1% of wild-type activity, ...
A new methodology for quantitative analysis of proteins is described, applying stable-isotope labeling by small organic molecules combined with one- or two-dimensional electrophoresis and MALDI-TOF-MS, also allowing concurrent protein identification by peptide mass fingerprinting. Our method eli...
The storage modulus (G′) and fracture properties of the non-treated and NEM-treated emulsion gels were investigated in the absence and presence of unadsorbed soy protein aggregates (USPA). In the absence of USPA, a decrease in the G′ of emulsion gels was observed after NEM treatment. However, ...
Bioavailability of nitric oxide in the body may be estimated by measuring the concentration of nitrate in plasma. However, it has not been reported whether sequestering of aminothiols in plasma affects the concentration of nitrate in the samples.N-ethylmaleimide (NEM) sequesters aminothiols in p...
Glucocorticoid hormones, via activation of their receptors, promote memory consolidation, but the exact underlying mechanisms remain elusive. We examined how corticosterone regulates AMPA receptor (AMPAR) availability in the synapse, which is important for synaptic plasticity and memory formatio...
We have studied the effect of zinc ion on the uptake of histamine (HA) into cultured astroglial and cerebral endothelial cells and established that Zn2+ enhances the uptake of the amine dose-dependently and in remarkable extents by increasing the Vmax to about 3-fold (from 3.25 ± 0.42 to 8.50 ±...
AimsThe effect of a non‐specific thiol‐alkylating agent N‐ethylmaleimide (NEM) was studied on neurogenic contractile mechanisms in rat ventral prostate gland.MethodsMale Wistar albino rats were used. The rats were killed by cervical dislocation under sevoflurane anesthesia and ventral prostat...
A nanosized highly ordered mesoporous zinc ferrite (ZnFe 2 O 4 ; ZF) was synthesized via co-precipitation method, further sulfated with ammonium sulfate solution to obtain sulfated ZF (SZF) and have been used for the synthesis of nopol by Prins condensation of β-pinene and paraf...
The kinetics of the nopol synthesis by Prins condensation of β-pinene and paraformaldehyde over Sn-MCM-41 synthesized by impregnation was evaluated using the initial reaction rate method. The reaction rate equation obtained from a kinetic model based on the Langmuir–Hinshelwood formalism with ...
In this work, a methodology for the parameter estimation of heterogeneously-catalyzed reactions is presented. A simulation-optimization framework based on a dynamic model was coupled with an identifiability analysis, in order to detect for which parameters the dynamic model is most sensitive. Th...
Mixed oxides catalysts derived from Mg/Al hydrotalcite-type materials with molar ratios of 1, 2, 3 and 4 were synthesized, characterized and tested in nopol epoxidation. A combined oxidant of hydrogen peroxide and acetonitrile was used in the presence of acetone and water as solvents. Catalysts ...
Transformations of epoxide derived from nopol in the presence of natural askanite-bentonite clay were studied. The major products of the isomerization in the cold are diols possessing a p-menthane skeleton, which are readily converted into bicyclic ethers when the reaction is carried out at room...
This work has firstly constructed purely Lewis acidic sites on MCM-41 successfully, for which Zr-MCM-41 catalysts with different Zr contents are prepared through the hydrolysis of ZrOCl2 on MCM-41, followed by calcination. Thus-prepared materials possess typical hexagonal mesostructures, irregul...
Among the many different kinds of program repair techniques, one widely studied family of techniques is called test suite based repair. However, test suites are in essence input-output specifications and are thus typically inadequate for completely specifying the expected behavior of the program...
A sensitive capillary GC-MS method for the analysis of dihydrostreptomycin has been developed. This method involves a new derivatisation procedure for dihydrostreptomycin with silylation of the hydroxyl groups with trimethylsilylimidazole and cyclisation of the guanidino groups with hexafluoroac...
The mechanoelectrical transduction channels on hair cells have been suggested to be operated by tip links that are stretched when the hair bundle is deflected in the direction of the tallest row of stereocilia. Localising these channels is therefore an important test of this hypothesis. The tra...
Monoclonal antibody (MAb) against streptomycin was prepared by using a streptomycin-keyhole limpet hemocyanin conjugate for the immunization of mice. Splenocytes from BALB/c immunized mice were fused with P3X63Ag8U.1 myeloma cells. This resulted in one hybridoma cell line. Using this MAb, we dev...
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