Hydrocarbons polarity

Rachel, K., Asuncionpunzalan, E. and London, E. (1995) Anchoring of tryptophan and tyrosine analogs at the hydrocarbon polar boundary in model membrane-vesicles - paralax analysis of fluorescence quenching induced by nitroxide-labelled phospholipids. Biochemistry 34,15475-15479. 

Pure non-hydrocarbon polar and non-polar gases at high pressure... 

Hydrocarbons Polar Organics Alcohols Chlorinated Hydrocarbons Strong Oxidants Strong Reductants Covalent Halides Cone. Sulfuric Usable Temp. Range (°C)... 

Russel GA. The rate of oxidation of aralkyl hydrocarbons. Polar effects in free radical reactions. J Am Chem Soc 1956 78 1047-1054. 

Specific foams have been developed for use in vapor suppression and the reactivity mitigation of hazardous material spills. While they have been found to be effective on specific materials (Norman, 1987), such foams are no longer manufactured for commercial sale because of a lack of consumer demand. The foam presently recognized as today s prime vapor suppressant is a universal foam, a special type of AFFF with a biosynthesized polymer. Typically proportioned at 3%, this foam is appropriate for use on hydrocarbons, polar solvents, and other hazardous materials (Chubb National Foam, 1992a). 

By adding small quantities of a hydrocarbon polar solvent to a chlorofluorocarbon, the overall cleaning abilities of both may be substantially improved. 

Aromatic hydrocarbon-polar group interaction in microemulsions, effect of aromatic compounds, 41,4 /... 

The separation scheme for deasphaltened bitumen on silica [WOELM, activated at 140°C (4 hr)] is shown in Figure 1. The fractions obtained were loosely termed hydrocarbons. Polar I, II, and III. The IR spectra of these fractions, as shown in Figure 2, suggested that Polar I was very similar to the polyaromatic/neutral polar fraction from the API 60-based separation after removal of additional material from alumina with pure benzene. Also, simulated distillation curves for this fraction from either procedure are very similar (Figure 3). The IR spectra of the Polar II and III fractions show the presence of all the functional groups which can be distinguished in these complex mixtures and which... 

The protonation of cinchona selectors by the acidic analytes may also occur under normal conditions (hydrocarbons + polar nonaqueous modifier) and can be responsible for the strong retention of the analyzed molecules, making such mobile-phase regime less practical for most of the chromatographic applications. 

This system offers the advantage of being able to synthesize a variety of hydrocarbon, polar, block polymers. It is, however, limited in the first stage to those monomers that are capable of good "living" anionic character. 

Coated piezoelectric quartz crystals as sensors for water, hydrocarbons, polar molecules, and hydrogen sulfide [8]... 

When pure water vapour is used as the mobile phase, the components of a mixture can be separated according to the functional groups present. For example, below 130°C, on the crystallohydrate Mg(N03)2 -bHiO (m.p. 85°C) the retention order is aliphatic saturated and unsaturated hydrocarbons < aromatic hydrocarbons < polar compounds. The elution order of ketones, ethers, esters, alcohols and acids is dependent on their polarity. The elution order of the n-alcohols is pentanoK butanoK propanoK ethanol < methanol this unexpected order probably results from hydrogen bond formation between the water of crystallization and the molecules of the compounds to be separated. 

Aromatic hydrocarbons, polar solvents, esters, and ketones will attack urethane. 

The word oil is used for an organic phase that is essentially immiscible with water and is thus relatively apolar. It can refer to a hydrocarbon, a partially or totally chlorinated or fluorinated hydrocarbon, single-chain alkane, cyclic or aromatic hydrocarbon, polar monoester such as ethyl oleate, long-chain alcohol such as dodecanol, triglyceride natural oil, or polycyclic cholesterol. The most typical oil phase is, of course, n-alkane, which would be characterized by its length or alkane carbon number (ACN). 

Russel, G. A. The Rates of Oxidation of Aralkyl Hydrocarbons. Polar Effects in Free Radical Reaction, / Am. Chem. Soc., 1956, 78,1047. 

Aromatic hydrocarbons Polar liquids H-bonding compounds... 

Because of their polar hydrophilic outer shell and relatively hydrophobic cavity, cyclodextrins are able to form inclusion complexes with a wide variety of suitable hydrophobic molecules (4) eg, nonpolar hydrocarbons, polar carboxylic acid, and amine derivatives (Fig. 2, Table 2). This phenomenon leads to significant changes of the solubility and reactivity of the guest molecules without any chemical modification. Water-insoluble molecules become completely water-soluble by treatment with aqueous solution of native cyclodextrins or their derivatives, eg, methylated or hydroxypropylated cyclodextrins. 

Aromatic hydrocarbons, polar solvents, esters, and ketones wiU attack urethane. Alcohols will soften and swell the urethane mbbers. These mbbers have limited service in weak acid solutions and cannot be used with concentrated acids. Nor are they resistant to steam or caustic, but they are resistant to the swelhng and deteriorating effects of being immersed in water. 

Aromatic hydrocarbons, polar solvents, esters, and ketones will attack urethane. They have a maximum operating temperature of 250 F/121°C dry and 150°F/66°C wet and a superior abrasion resistance. They are used to line dishwashers and washing machines. 

The property of rubber elasticity is displayed by an ever increasing range of polymers—hydrocarbon, polar and even inorganic. Such rubbery polymers, however, differ in the way by which they are made, in their chemical and physical properties, in the way in which they form network structures and in the way in which they age. Such differences are due, primarily, to differences in their underlying chemistry and chemical structure. 

Noble metal derivatives adapt to various solvents (hydrocarbons, polar, even protic) whereas Co and Ni, especially under the form of cationic complexes are only active in hydrocarbons or halogenated hydrocarbons. 

Properties Liq., paste sol. in most hydrocarbon polar and chlorinated soivs., adds water-dlsp. 100% cone. 

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