As-deposited plasma polymer films of tetravinylsilane were modified by UV irradiation at ambient conditions. Surface and bulk spectroscopic techniques confirmed significant changes in chemical composition and structure that resulted in increased mechanical constants (Young's modulus, hardne...

Functional coatings constructed as bilayer or multilayer (10-layer) structures were deposited from pure tetravinylsilane monomer or a mixture of monomer and oxygen gas using plasma-enhanced chemical vapor deposition. Selected deposition conditions were used to deposit a plasma polymer layer of A...

Several organophosphorus agrochemicals 2a-g with thioether, phosphoramidic, phosphorothioic, and phosphorothionic functions were reacted with perfluoro cis-2-n-butyl-3-n-propyloxaziridine 1. The selective oxygenation of sulfide function to give sulfoxide derivatives 3a-g occurred in high yields ...

Thiophosphate insecticides—fenitrothion, diazinon and methylparathion—inhibit hepatic drug-metabolizing enzyme activity, which was assayed using aminopyrine and aniline as substrates. About 50 per cent inhibition was noted 4 hr after the injection of 25 mg/kg of fenitrothion into mice. The add...

In this manuscript, we report the precipitation and crystallization of three proteins (chicken egg-white lysozyme, porcine insulin and bovine insulin) using ammonium carbamate as salting-out agent. For these proteins, data on solubility, metastability limits, and osmotic second virial coefficien...

The issue of managing low-quality waste heat onboard modern high-performance aircraft represents a critical performance limitation that can severely restrict flight envelopes, preclude the integration of high-power electronics, or compromise system reliability. The principal engineering challeng...

Photoluminescence (PL) and excitation (EX) spectra in epitaxially grown poly(dimethylsilane) (PDMS) films prepared by evaporation have been measured. The epitaxial films are prepared onto mechanically oriented poly(tetrafluoroethylene) (PTFE) layer or onto cleaved surface of alkali halide crysta...

Structural analogues of the natural polyamines which contain a Si(CH3)2 group in the central carbon chain have previously been found to be cytostatic to various tumor cell lines and to inhibit tumor cell growth in experimentally-grafted animals. We show that membrane damages induced by hexamine ...

Hydrophobic organo-silane based monolithic capillary columns were prepared by thermally initiated free radical polymerisation within the confines of 200 μm i.d. fused silica capillaries. A novel crosslinker, namely bis(p-vinylbenzyl)dimethylsilane (BVBDMS), was copolymerised with p-methylstyren...

Highly stable alkenyl[2-(hydroxymethyl)phenyl]dimethylsilanes are prepared by stereo- and regioselective hydrosilylation of alkynes catalyzed either by a platinum or ruthenium catalyst using protected [2-(hydroxymethyl)phenyl]dimethylsilanes. Cyclic silyl ether, 1,1-dimethyl-2-oxa-1-silaindan, a...

The initial stage of cubic silicon carbide (3C-SiC) growth on a Si(0 0 1) surface using dimethylsilane (DMS) as a source gas was observed using scanning tunneling microscopy (STM) and reflection high-energy electron diffraction (RHEED). It was found that the dimer vacancies initially existing on...

Regioselective reaction of N-trimethylsilyl-N-acetylglycine N’,N’-dimethylamide with chloro(chloromethyl)dimethylsilane yields chlorosilane MeC(O)N(CH2SiMe2Cl)CH2C(O)NMe2 with a five-membered C,O-chelate ring involving the N-acetyl group rather than the six-membered ring involving the N’,N’-...

Adsorption kinetics of dimethylsilane (DMS) at Si(0 0 1) surface has been investigated by using temperature-programmed desorption (TPD). The saturated hydrogen coverage of two monolayer was identical with that from monomethylsilane (MMS)-saturated surface. By being combined with the C/H ratios w...

Poly(methyl styrene-co-bis(p-vinylbenzyl)dimethylsilane)-based monolithic capillary columns were optimized for separation of low, medium, and high molecular-weight analytes. The morphology and consequently the chromatographic performance of these monoliths were tuned by changes in the volume-rat...

[1-13C], [2-13C] and [6-13C] d-glucose were, respectively, ozonized in a semi-batch reactor in acidic and basic conditions. The composition of the gas phase was evaluated by on-line mass spectrometry measurements. The quantitative and isotopic analyses of the carbon dioxide formed during ozoniza...

The mechanism of methane reforming with carbon dioxide over 1.0 wt.% Rh/SBA-15 catalyst has been studied by the 13C and 1H magic-angle spinning (MAS) NMR spectroscopies under controlled atmosphere condition using 13CH4 + 12CO2 and 12CH4 + 13CO2 as reactants. The effect of temperature in the regi...

In this work, CO2 gas was absorbed from a gas mixture in a custom made Polyvinylidene fluoride (PVDF) hollow fiber membrane contactors by using a variety of Methyl Diethanolamine (MDEA) aqueous solutions and nanofluids. An ultrasonic dispersion method was used to prepare nanofluids. SiO2 nanopar...

A total of twelve coal samples at bituminous rank from China were studied using a combination of elemental analyzer/isotope ratio mass spectrometry (EA/IRMS) and solid-state 13C nuclear magnetic resonance (NMR) spectroscopy techniques to determine their carbon isotopic compositions and carbon ty...

The efficiency of CO2 uptake by the amines 2-(2-aminoethoxy)ethanol (DGA), 2-amino-2-methyl-1,3-propanediol (AMPD), 2-amino-2-methyl-1-propanol (AMP), 2,2′-iminodiethanol (DEA) and 2-(butylamino)ethanol (BUMEA) has been investigated either in aqueous and in 2-(2-methoxyethoxy)ethanol (DEGMME) s...

DMOF-1 (Zn2(bdc)2dabco) is a metal–organic framework with tetragonal symmetry. It contains parallel one-dimensional channels with a diameter of about 0.75nm interconnected by smaller windows. For carbon dioxide adsorbed in the nanochannels the chemical shift tensor and the diffusion tensor were...