poly(vinyl chloride) (PVC) plasticized with EDHadEven thoug ther reports had implied that certain formulations of PVC medical tubings (2,3) and containers would, in fact, release plasticizers as well as additives to solutions, little concern had been expressed as to the possible health consequences to humans from leaching of these agents. Since Jaeger and Rubin's publication, however, considera...

Introduction It has been proposed that oxygen functional groups (i.e., carboxylic acids and their salts, phenols, and ethers), prevalent in low rank coals, are responsible for cross-linking reactions that inhibit the efficient conversion of low-rank coals to liquid fuels and chemicals. In the pyrolysis and liquefaction of low-rank coals, cross-linking has been correlated with evolution of CO2 a...

The present article deals with the determination of total amount glucose and fructose in natural honey samples by optical micrometry (OM) method. (Poly)vinyl alcohol spherical granules impregnated a 0.05 mol/l borax solution were chosen as sensitive element. It was shown that formation chelate esters boron polymer carbohydrates is pH-dependent process, pH range 8.5–10.0 most appropriate for qua...

Poly(L-lactide) (PLLA) oligo-esters with α-hydroxyl-ω-alkyl (alkyl = −CH2−[CH2−CH2]n−CH3, where n = 1, 2, 4, 5, 6, 7, 8, 9, and 10) end groups were synthesized by ring-opening polymerization of L-lactide (L-LA) catalyzed by tin(II) 2ethylhexanoate Sn(Oct)2 in the presence of aliphatic alcohols as initiators (HO−CH2−[CH2−CH2]m−CH3, where m = 1, 2, 4, 5, 6, 7, 8, 9, and 10). High yields (∼ 62 to ...

Deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. Silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.

deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.

The fuel qualities of several biodiesels containing highly saturated, mono, and poly unsaturated fatty acids, as well their combustion exhaust emission characteristics, were studied. Six biodiesel samples divided into two groups based on acid composition, including group 1 (coconut, castor, jatropha) II (palm, karanja, waste cooking oil biodiesel). All fuels (in both groups) tested in a single-...