Influence Of Aliphatic Alcohols Research Articles

Various morphologies of clinoptilolites synthesized in alcohol-solvent hydrothermal system and their selective adsorption of CH4 and N2

Clinoptilolite (CP) with various morphologies, such as spherical, flower, cylindrical, and disc-shape, were successfully synthesized in the presence of alcohol solvents with different carbon chain lengths. The structural and textural properties of the resultant CPs were characterized via XRD, SEM, TG-DSC profiles, TEM, NMR, FT-IR spectra, and N 2 sorption isotherms. The effect of the additive amount of various alcohol solvents on the induction (nucleation) periods and growth stages of synthetic CPs were detailed investigated. Their activation energies of induction ( E n ) and growth ( E g ) periods during crystallization intervals were calculated according to the Arrhenius equation, where the former being larger than the latter, indicating that nucleation is the key step during the whole synthesis of CPs. Particularly, the E n value gradually increased as the increasing chain-length of the used alcohol, but smaller than that without additive alcohols. These demonstrations implied that the presence of alcohol solvents is beneficial to promote the nucleation process of synthetic CP. Furthermore, their CH 4 and N 2 adsorption capacity and selectivity were preliminary explored, showing the highest selective factor of 5.58 at 0 °C for CH 4 /N 2 separation using flower-like CP as an adsorbent. These results suggested a promising adsorbent for wide applications in gas separation. • Alcohol-modified hydrothermal method for synthesis of clinoptilolite was proposed. • Influence of aliphatic alcohols on morphology of clinoptilolites was explored. • Crystalline kinetic for induction and growth stage in clinoptilolite was studied. • Application of synthetic clinoptilolite in CH 4 /N 2 separation was investigated.

Modification of aviation gasoline with aliphatic alcohols additives: an analytical review of prospects

The paper presents the results of analysis of the regulations of the traditional aviation fuels quality. The content of antiknock additives in these fuels has been established in the investigated fuels. The influence of aliphatic alcohols on operational, physical and chemical and environmental properties of traditional petroleum aviation fuels has been studied. The research has also investigated the use of ethyl, methyl and butyl alcohols in motor-car fuel systems in the composition of complex and pure alternative fuels in aviation. It has been confirmed that addition of aliphatic alcohols to traditional aviation fuels enables reduction of harmful emissions in the upper layers of the atmosphere. Alcohol-containing petrol is being enriched with oxygen, which enables more complete combustion of fuel and lessens emissions of carbon oxides.

THE COMPARATIVE CHARACTERISTICS GASOLINE VOLATILITY WITH DIFFERENT CONTENT OF OXYGENATES

The influence of aliphatic alcohols on the physical stability of gasoline. The influence of oxygenates in the fractional composition of the fuel. The results of studies of the effect of isopropyl, ethyl isobutyl alcohol on performance characteristics of gasoline A-95.

Comparison of the Effects of Water-Soluble Solutes on Multibubble Sonoluminescence Generated in Aqueous Solutions by 20- and 515-kHz Pulsed Ultrasound

The influence of aliphatic alcohols, sodium dodecyl sulfate and sodium chloride on the intensity of sonoluminescence (SL) generated by 3.5-ms pulses of 20-kHz and 515-kHz ultrasound in air-saturated aqueous solutions has been examined. The water-soluble solutes were found to affect the SL quite differently at the two frequencies when applied at approximately the same range of power. At 20 kHz, the solutes had only a small effect on the SL signal generated, whereas at 515 kHz, the effect observed depended strongly on the specific solute present in solution. The contrasting results obtained at the two ultrasound frequencies have been interpreted in terms of transient bubbles giving rise to the SL at 20 kHz and repetitive transient bubbles producing the SL at 515 kHz.

The Influence of Aliphatic Alcohols on Leaf Senescence

Because of the effects of ethanol used as a solvent in other experiments, the action of aliphatic alcohols on leaf senescence in the dark has been studied systematically. These compounds both maintain chlorophyll and prevent proteolysis in the dark, much as do the cytokinins and other senescence-delaying substances. The activity of the straight-chain alcohols increases in a log-linear fashion with increasing chain length up to 1-octanol. Introduction of a branch in the chain or of a second OH group greatly decreases, or in some cases annuls, the antisenescence activity. In all cases, the action on senescence is closely (although not always exactly) paralleled by opening of the stomata. Abscisic acid and exposure to high concentrations of osmoticum, both of which close the stomata, antagonize the action of the alcohols. Some interactions with other agents are noted. The effects are compared with reported effects on seed germination, on hemolysis and animal membranes, and especially on permeability to K(+) ions, and a tentative basis for the mechanism of action is advanced.

Influence of Aliphatic Alcohols on the Hepatic Response to Halogenated Olefins

Influence of Aliphatic Alcohols on the Hepatic Response to Halogenated Olefins

Influence of aliphatic alcohols on the hepatic response to halogenated olefins.

The role of alcohols in potentiating the toxicity of halogenated hydrocarbon solvents has been reviewed. The toxicity of carbon tetrachloride and chloroform can be markedly potentiated by prior treatment with ethanol or phenobarbital. Trichloroethylene toxicity may also be potentiated by ethanol ingestion. Prior ethanol ingestion acts by altering biochemical parameters that result in an increased response to subsequent solvent exposure. Simultaneous exposure to both ethanol and trichloroethylene allows for competitive substrate inhibition of metabolism since these compounds share several common enzymatic pathways. Thus the toxic response to multiple exposures varies depending upon the time sequence and the comparative levels of the individual components. Phenobarbital apparently potentiates solvent toxocity by induction of the microsomal mixed function oxidase system. Ethanol, either on a chronic or single dose basis, also has the ability to stimulate this enzyme system. Although alteration of the microsomal mixed function oxidase system by chronic ethanol ingestion may play an important role in potentiation of solvent toxicity, the potentiation seen following a single dose of ethanol cannot be fully accounted for by the known effects of ethanol on the mixed function oxidase system. In addition to ethanol a large number of other alcohols will markedly potentiate the hepatotoxic response to solvents such as carbon tetrachloride and chloroform. The mechanisms involved in such potentiation are not known at the present time.

The influence of aliphatic alcohols and their halogen derivatives on the coenzyme A in the liver of mice

The effect was studied of i.v. administration of various aliphatic alcohols such as methanol, ethanol, propanol, monochloroethanol, trichloroethanol and tribromoethanol and their corresponding aldehydes on the activity ofcoenzyme A in the liver of white mice. All compounds except trichloroacetaldehyde hydrate, tribromoethanol and acetone blocked the CoA. The blocking effect reached a maximum 30–120 min after the administration of the alcohols and immediately after the administration of the aldehydes. The results support the view that CoA is not blocked by the alcohols themselves but by the aldehydes, derived from the alcohols.

17. Solubility influences. Part V. The influence of aliphatic alcohols on the solubility of ethyl acetate in water

17. Solubility influences. Part V. The influence of aliphatic alcohols on the solubility of ethyl acetate in water