[No abstract submitted] / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate

The kinetics of the thermal decomposition of methyl and ethyl disulfides were studied in a quartz reaction vessel. The reactions were followed by means of a mercury manometer and chemical analyses for reaction products were carried out at various stages of the reactions. A mechanism for the decomposition process is proposed on the basis of the results obtained. / Science, Faculty of / Chemistry, Department of / Graduate

The usual Bridgman cell for measurement of thermal conductivity has been modified to allow but a minimum of conduction. The film thickness for liquids used is approximately 0.045 cm., and hence a very small sample will suffice for measurement. Differential thermocouples were used for determining the temperature drop. Most of the heat losses in the metal contact have been prevented by a needle mounting. Measurements have been carried out on the four single-chain saturated aliphatic hydrocarbons C₂₂ H₄₆, C₂₆ H₅₄, C₃₀ H₆₂ and C₃₄ H₇₀ over a range of temperatures above their melting points. The thermal conductivities tend to increase with increasing molecular weight and with decreasing temperature. / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate

[No abstract submitted] / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate

The Bates Calorimeter for measuring the heat conductivities of hydrocarbons was partially reconstructed so as to diminish the heat loss through the walls of the iron container. This was done by imbedding some nichrome wire heating elements in the insulating materials just outside iron wall. The current sent through this coil was so controlled as to reduce the heat loss from the liquid at this point. A series of measurements on several hydrocarbons gave the results below. Trans decahydronaphthalene k₃₅ = 0.001155 Cis k₃₅ = 0.001178 N decane k₃₅ = 0.000652 N dodecane k₃₅ = 0.000654 N tetradecane k₃₅ = 0.000650 N hexadecane k₃₅ = 0.000650 / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate

No abstract / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate

No abstract / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate

No description available.

No description available.

Saturated hydrocarbons were extracted from fatty tissue of beef heart and identified by combined gas chromatography-mass spectrometry. A complete series of normal alkanes from C₁₄ to C₃₅ was identified together with three isoprenoid hydrocarbons, 2, 6, 10, 14- tetramethylpentadecane (pristane), 2, 6, 10, 14- tetramethylhexadecane (phytane), and 2, 6, 10- trimethyltridecane. In addition, a C₁₇ branched alkane with an isoprenoid-like fragmentation pattern was identified but the spectrum could not be matched with that of a C₁₇ isoprenoid hydro-carbon reported in sediments. The distribution pattern of the ṉ-alkanes is very similar to that reported in pasture plants, indicating that the ṉ-alkanes are derived from the steer's diet. The isoprenoids have not yet been reported in plant tissues, suggesting that they might be produced in the steer from the phytol side chain of chlorophyll a.