A new, fast, solvent-free and efficient method is provided to prepare thioformamides by reacting isocyanides derivatives, carbon disulfide and benzylamine under microwave irradiation.

For design of gas phase polymerization processes for propylene copolymers, it is essential to understand how monomer solubility and diffusivity in the polymer are affected by comonomer content and polymer crystallinity. Measurements of solubilities and diffusion coefficients of ethylene in four ...

The kinetics of propylene epoxidation over Au supported on titanium silicalite-1 (Au/TS-1) catalysts were measured in a continuous stirred tank reactor (CSTR) free from temperature and concentration gradients. Apparent reaction orders measured at 473 K for H2 (0.7 order), O2 (0.2), and propylene...

Several recent studies investigated the use of the novel Zeolitic-Imidazolate Framework (ZIF-8) membranes for olefin-paraffin separation. In this manuscript, a techno-commercial model is developed to examine the use of these membranes for separating propylene from propane. Single-stage and two-s...

A series of surfactant-free nickel-core and silver-shell ([email protected]) nanoparticles encapsulated within the mesopores of SBA-15 were synthesized and tested as catalysts for direct propylene oxidation by molecular oxygen. The influences of temperature, Gas Hour Space Velocity (GHSV) and Ni...

Selective oxidation of propylene glycol is studied over silica-supported FeMoO catalysts with different Mo/Fe molar ratio. The catalysts are synthesized by wetness impregnation method and characterized by XRD, UV–vis, Raman spectroscopy, TPR and DFT methods. The catalytic properties are tested ...

Ag/MCM-41 catalyst is prepared by impregnation technique and characterized by low-temperature N2 sorption, XRD, TPR and TEM methods. The ordered structure of mesoporous silicate MCM-41 is used as a nanoreactor to synthesize and stabilize small Ag nanoparticles. Two types of Ag particles are show...

Ce0.05Zr0.95O2 (denoted as CZ) was prepared by using a precipitation method to support tungsten oxide. For comparison, ZrO2 (denoted as Z) and CeO2 (denoted as C) supports were also prepared with the same method. The WOx/Z, WOx/CZ, and WOx/C catalysts were characterized by XRF, nitrogen adsorpti...

Based on a typical gas composition from a methanol-to-propylene (MTP) reactor, and guided by a requirement to recover both propylene and ethylene, three separation strategies are studied and simulated by using PROII package. These strategies are sequential separation, front-end dethanization, an...

Azaserine is an antineoplastic agent, mutagen and carcinogen that is known to inhibit purine metabolism. Comparison of mutation in stationary-phase cultures of E. coli WP2 and a series of its DNA repair-deficient mutants exposed to azaserine showed that the effects of the compound closely mimick...

The in vitro metabolism of azaserine was determined in various tissues of mouse, dog, and rat with the aim of elucidating the stoichiometric relationship of azaserine transformation with the production of pyruvate, ammonia and glycolic acid. The influence of in vivo treatment with azaserine and ...

The mutagenicity of O-diazocetyl-l-serine (azaserine) and 6-diazo-5-oxo-l-norleucine (DON), glutamine analogues, were assayed in heterozygous soybean plants (Y11y11), according to the appearance of mutational spots (yellow, dark green and twin) on the leaves. The mutagenicity of azaserine was de...

The enzyme γ-glutamyl transpeptidase (GGT) is characteristically present at high levels in mammalian cells that are vulnerable in vivo to the selectively toxic and carcinogenic effects of the naturally occurring diazo amino acid L-azaserine. The possible role of GGT as a determinant of cellular...

The effect of a calcium channel blocker, verapamil, on cholecystokinin (CCK)-enhancement of pancreatic carcinogenesis induced by azaserine was investigated in Wistar rats. During and after 25 weekly injections of azaserine, each rat received alternate-day injections of CCK-octapeptide (CCK-8) an...

γ-Glutamyltranspeptidase (GGT) catalyzes the cleavage of such γ-glutamyl compounds as glutathione, and the transfer of their γ-glutamyl group to water or to other amino acids and peptides. GGT is involved in a number of biological phenomena such as drug resistance and metastasis of cancer cel...

The effects of prolonged administration of the diuretic amiloride on pancreatic carcinogenesis induced by azaserine and on the labeling index of carcinogen-induced pancreatic lesions were investigated in Wistar rats. Rats were given 25 weekly injections of 10 mg/kg body weight azaserine and also...

According to the current paradigm, an inhibition of nitrate and ammonium assimilation by methionine sulfoximine (MSX) and azaserine indicates the importance of glutamine synthetase (GS) and glutamate synthase (GOGAT) in the assimilation of ammonia and the production of glutamate. Inhibitors of G...

The growth of Escherichia coli is inhibited by an antibiotic compound, azaserine (O-diazoacetyl-l-serine). Previous studies revealed the biochemical properties of azaserine, which involves inhibition of various enzymatic reactions as well as introduction of DNA breakage. However, genetically, no...

AimThe present study was undertaken to investigate the effect of Emilia sonchifolia on azaserine (O-diazoacetyl-L-serine)-induced pancreatic dysplasia in Wistar albino rats.

This work presents new data of activity coefficients at infinite dilution, γ∞ of different organic solutes and water in the 1-(2-methoxyethyl)-1-methylpyrrolidinium trifluorotris(perfluoroethyl)phosphate ionic liquid. Values of γ∞ were determined for 62 solutes, including alkanes, alkenes, a...