In the present study we cloned, sequenced, and confirmed the presence of mRNAs of gonadotropins (FSH-β, LH-β subunits) from the brain and pituitary of tilapia, Oreochromis niloticus. Further, we examined the spatio-temporal expression pattern of FSH-β and LH-β in the brain and pituitary of t...

Single phase powder samples of the transition metal pyroarsenates, M2As2O7 (M = Co, Mn, Ni), have been prepared and analyzed by X-ray diffraction, chemical analysis, high resolution powder neutron diffraction, and differential scanning calorimetry measurements. Co2As2O7 and Ni2As2O7 were found t...

The glass-forming domain in the new Sb2O3-PbCl2-LiCl system has been delimited. Systematic investigations were undertaken to establish the influence of each starting component on the characteristic temperatures (Tg and Tx) and the density. Glasses have Tg between approximately 255 °C and 310 °...

Luminescence features of samarium ions in non-conventional antimonate oxide glasses added with HfO2, Y2O3 and Sc2O3 were investigated. From absorption and luminescence spectra various radiative parameters (associated with orange emission transition viz., 4G5/2 → 6H7/2) that give the information...

A new simple method has been used to prepare 6-substituted 4-(subst. amino)-5-aryldiazenyl-1-arylpyridazinium salts from N-methyl- or N-aryl-3-amino-1-phenylbut-2-en-1-ones and 4-aminopent-3-en-2-ones and substituted benzenediazonium tetrafluoroborates or hexafluorophosphates. The structure of s...

Arsenate reducing bacteria are known to potentially contribute to metabolize or transform arsenic from groundwater or sediments. Environmental arsenic bioavailability and the influence of these bacteria on arsenic mobilization have not been comprehensively investigated till date. In this present...

In this study, a detailed characterization of an extremely complex arsenical silver ore using mineral liberation analysis and diagnostic leaching for identification and occurrence of silver phases is presented. Mineralogical analysis of the ore has shown that silver is present mainly as acanthit...

Mobile species transfer accompanying the redox switching of poly(vinylferrocene) (PVF) in aqueous perchlorate solutions of four cations was investigated using the electrochemical quartz crystal microbalance (EQCM). Cyclic voltammetry in 0.05 M solutions containing hydronium, sodium, rubidium or ...

The vibrational relaxation times of the ν2 fundamental mode and the {2ν2 + ν1} = [Ω− + Ω+] Fermi doublet of the ClO the rubidium perchlorate crystal are investigated as a function of temperature between 7 and 300 K using high repetition-rate time-resolved picosecond laser techniques. The re...

A praseodymium (Pr)-doped PbO2 electrode was synthesized by a co-deposition method with the help of polyethylene glycol (PEG). The morphologies and structures were characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. The electrochemical properti...

A novel ligand-free indium(III)-catalyzed Heck reaction of various aryl iodides with olefins has been developed. As a result, a set of the corresponding E-internal olefins was obtained selectively in high to excellent yields. The reaction condition is tolerant to air, in accordance with the conc...

Rapidly labeled nuclear RNA from rat liver was fractionated by methyl albumin kieselguhr chromatography into the ribosomal and DNA-like RNA components. Injection of 100 mg/kg of α-methyltryptophan into rats stimulated the labeling by [3H] orotic acid of both species of nuclear RNA; there was a ...

The effects on rats of two drugs that reduce brain 5-hydroxytryptamine synthesis by different mechanisms were compared. Locomotor activity and home cage behaviour during the dark period, food intake and brain 5-hydroxytryptamine and 5-hydroxyindoleacetic acid concentrations were measured. p-Chlo...

The metabolism of α-methyltryptophan was studied in the rat. The α-methylamino acid was measured by colorimetrie and radioactive methods (the latter used for tritium-labeled material) at various time intervals after its intraperitoneal injection. The specific uptake (μgg organ) was highest in...

Alpha-methyltryptamine and α-methylserotonin have been detected in the brain following the administration of doses of AMTP (α-methyltryptophan) of 50 mg/kg or greater. At 4–6 hr after a single injection of AMTP the concentration of α-methyltryptamine was very much smaller than that of α-met...

An expedient and highly stereocontrolled route to (R)-α-methyltryptophan and its orthogonally protected analogs has been developed via a four-step conversion from L-alanine in good overall yields. The stereochemistry of the products is confirmed by X-ray diffraction analysis, NMR spectroscopy a...

1. Alpha-methyltryptophan, on administration to experimental animals gives rise to cerebral alpha-methylserotonin, which substitutes for serotonin in certain behavioral and functional tests.2. Such results are consistent wich the similarity of the properties of the two indoleamlnes with respect ...

The collision-induced dissociation spectra of isomeric [b5]+ ions consisting of an α-methyltryptophan and four alanine residues are very similar, indicating that there is a substantial amount of isomerization prior to fragmentation. The major dissociation products are the combination of the [b4...

Collision-induced dissociation (CID) of hexapeptide radical cations consisting of four alanine residues, one α-methyltryptophan and a glycine residue at the C-terminus results predominantly in bond cleavages around the sterically crowded α-methyltryptophan residue, but all generated [b5 – H]+...

The following compounds with higher antiallergic activities were isolated from eau de cologne mint leaves: 5,6,4′-trihydroxy-7,8-dimethoxyflavone (6), 5,6,4′-trihydroxy-7,8,3′-trimethoxyflavone (7), 5,6-dihydroxy-7,3′,4′-trimethoxyflavone (8), 5,6-dihydroxy-7,8,3′,4′-tetramethoxyflavone (...