4,046 Result(s)
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Article
Spreading of mixed solution of fluorocarbon and hydrocarbon surfactants on oil
The surface tension and the spreading (on oil) properties of the mixed solution of anionic (or cationic) and cationic (or anionic) fluorocarbon and hydrocarbon surfactants have been studied. The anionic-cation...
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Article
The decay of188Re
The γ-ray spectra of188Re decay have been studied by using two Ge/Li/ spectrometers and a three parameters /E-E-T/ List coincidence system. The energies and relative intensities of 52 γ-rays and cascade relations...
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Article
Orientation in uniaxially stretched plasticized atactic polystyrene
Fourier transform infrared spectroscopy and birefringence measurements have been used to study the changes in molecular orientation which occur on drawing of plasticized as compared to pure polystyrene (PS) at...
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Article
Some radical chemistry from Shanghai
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Article
FTIR-ATR spectroscopic determination of the distribution of surfactants in latex films
FTIR-ATR (Fourier Transform Infra-Red-Attenuated Total Reflection) has been used to analyze the surface composition of coalesced acrylic latex films. The behavior of two anionic surfactants has been characteri...
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Article
Studies on ion exchange equilibria and kinetics
The kinetics and equilibria of cation exchange HR+Na+=NaR+H+ with 001×7 strong acidic resin have been studied. The isotherm for this reaction has been determined, and the rational equilibrium constant, Ka, calcul...
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Article
Studies on ion exchange equilibria and kinetics
The kinetics of cation exchange 2RH+UO 2 2+ =R2UO2+2H+ for the forward and reverse reaction with strongly acidic 001×7 resin has been studied. It was found expe...
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Article
The synthesis of chlorine-terminated telechelic polyisobutylene
In synthesizing chlorine-terminated telechelic polyisobutylene (PIB) with a p-DCCCp-dichlorocumene/BCl3/CH2Cl2 system, it is found that cycloalkylation occurs parallel with propagation. The factors leading to cyc...
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Article
The synthesis of chlorine-terminated telechelic polyisobutylene
This paper deals with chain transfer reactions, primarily to monomer and to inifer (p-DCC/BCl3) in the carbocationic polymerization of isobutylene (IB). It is found that the MW and functionality of the polymer de...
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Article
Adsorption of polyethylene glycol from aqueous solution on montmorillonite clays
Adsorption rates and capacities of polyethylene glycol (PEG) were investigated for five montmorillonite clays. The adsorption of PEG for all the montmorillonite clays was rapid, and equilibrium was attained wi...
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Article
Determination of210Pb and210Po in human tissues of Japanese
To determine the levels of210Pb and210Po in human tissues of people in Japan, various tissue samples were obtained at autopsy from the cadavers of 22 oncologic cases, mainly in Niigata Prefecture in northern Japa...
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Article
Acylation of alkll 1,4-dimethoxybenzenes by substituted benzoic acids in trifluoroacetic acid
A clean, convenient and highly selective acylation of alkyl 1,4-dimethoxy-benzenes, e.g., 2-methyl-1,4-dimethoxybenzene, by using substituted benzoic acids in dry trifluoroacetic acid has been achieved. The su...
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Article
Scavenging effects of chinese herbs and natural health products on active oxygen radicals
Although the clinical efficacy of some Chinese herbs and natural products have been well known for a long time, investigation of their biological effects and reaction mechanisms is just at the very beginning. ...
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Article
Ion exchange of uranium(IV) in hydrochloric acid—Organic solvent mixed media
In this paper, the distribution of U(IV) between a solution and a strong basic anion exchange resin 201×7 in mixed media HCl-methanol, HCl-ethanol, HCl-n-propanol and HCl-acetone has been investigated. The dis...
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Article
Experimental studies on some aspects of toxicological effects of gas phase cigarette smoke (GPCS)
We have studied the toxicological effects of gas phase cigarette smoke (GPCS) on: 1) lecithin-formed liposome lipid peroxidation; 2) the liposomal membrane fluidity; 3) conformation changes of rat lung cell me...
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Article
Synthesis and magnetic properties of copper(II)-cobalt(II) complexes ofN,N′-1,2-propanedisalicylamidatocuprate(II)
The binuclear metal complexes [Cu(sampn)Co(L)2] (L=bipy, phen), have been prepared by the reaction of sodiumN,N′-1,2-propanedisalicylamidatocuprate(II) heptahydrate, Na2[Cu(sampn)] 7H2O, with a divalent metalion,...
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Article
A nonradiative energy transfer fluorescence spectroscopy study of poly(vinyl chloride)/poly(methyl methacrylate) blends
The miscibility of poly(vinyl chloride)/atactic poly(methyl methacrylate (PVC/a-PMMA) blends was investigated by nonradiative energy transfer fluorescence spectroscopy using naphthalene-labeled PVC (PVC-N) wit...
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Article
Determination of rare earths and other trace elements in samples of Antarctica by neutron activation analysis
The concentrations of REE and other trace elements have been determined in samples of Antarctica by Instrumental Neutron Activation Analysis (INAA). The samples were collected from the West Lake area near Grea...
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Article
Molecular enthalpies: 1. Ground-state thermodynamic and computed enthalpies of the norbornadiene cycle
The enthalpies of formation of norbornadiene, norbornene, norbornane, nortricyclane, and quadricyclane, which are experimentally known, have been calculated using the semiempirical programs MNDO, AM1, and PM3 ...
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Article
EPR studies on electron transfer reactions between O-benzoyl-N-alkylhydroxylamines and perfluoroacyl peroxides. Generation of n- and sec-alkyl perfluoroacyl nitroxides and sec- and tert-alkyl perfluoroalkyl nitroxides
Both EPR studies and product analysis have disclosed that the oxidation of O-benzoyl-N-alkylhydroxylamines (1, 4, 7) by perfluoroacyl peroxides (2) is an electron transfer-initiated process. Depending on the n...
