Diesel or jet fuel range branched alkanes were synthesized for the first time by the combination of hydroxyalkylation-alkylation (HAA) of 2-methylfuran with hydroxyacetone and subsequent hydrodeoxygenation. Due to the electron-withdrawing effect of the hydroxyl group, the hydroxyacetone route exhibited evident advantages (higher HAA reactivity and diesel yield) over the previous acetone route.

Electronic cigarettes enabling enhanced airflow have grown in popularity in recent years. The objective of this study is to show that flow rates modulate the levels of specific aerosol toxicants produced in electronic cigarettes. Flow rates used in various laboratory investigations involving e-cigarettes have varied widely to date, and can thus promote interlaboratory variability in aerosol pro...

Early stud& with pyrimidines administered t.o animals established the fact that, these compounds arc metabolized (3, 4). Present concepts of the pathways of pyrimidine metabolism stem largely from the work of Cerecedo (4), in which he measured the changes in the urinary excretion of urea after feeding pyrimidines and related subst.ances. On the basis of these studies, he proposed an init.ial ox...

Abstract The conversion of biomass-derived oxygenates over zeolite catalysts constitutes a challenge for the efficient production bio-based chemicals and fuels due to difficulty in controlling selectivity high coke formation such reactions. This is partly attributed microstructure catalyst which affects products derived from oxygenates. In this study, deactivation characteristics three differen...

that, under anaerobic conditions, appreciable quantities of pyruvate were metabolized by Flex ner-,Jobling carcinoma homogenates to reduced compounds other than lactic acid. For these stud ies a medium of glycolytic substrates and cofactors was employed in the presence of a “fluorideblock.― This medium permitted the quantitative estima tion of pyruvate metabolism to products other than lact...

An aldehyde dehydrogenase capable of acting on Llactaldehyde was detected in a strain of Escherichia coli K-12 selected to grow on 1,2-propanediol as the sole source of carbon and energy. This enzyme activity was purified over 200-fold by ammonium sulfate fractionation followed by diethylaminoethyl cellulose chromatography, Sephadex G-100 gel flltration, and DEAE-Sephadex chromatography. The pu...

The sulphur aroma compounds produced from a phosphate-buffered solution (pH 8) of l-cysteine and l-, l-[1-13C] or l-[4-13C] ascorbic acid, heated at 140±2°C for 2h, were examined by headspace SPME in combination with GC-MS. MS data indicated that C-1 of l-ascorbic acid was not involved in the formation of sulphur aroma compounds. The sulphur aroma compounds formed by reaction of l-ascorbic acid...

that, under anaerobic conditions, appreciable quantities of pyruvate were metabolized by Flex ner-,Jobling carcinoma homogenates to reduced compounds other than lactic acid. For these stud ies a medium of glycolytic substrates and cofactors was employed in the presence of a “fluorideblock.― This medium permitted the quantitative estima tion of pyruvate metabolism to products other than lact...