601 research outputs found
Top-Quark Mass and Bottom-Quark Decay
The possibility of a long B-meson lifetime is explored, in which case the weak mixing angles θ_2 and θ_3 are quite small. This allows the derivation of a lower bound on the top-quark mass as a function of the B-meson lifetime, by comparison of the short-distance prediction for the CP-nonconservation parameter ε with its experimental value. The bound is significant for τ_B>4×10^(-13) s
Synthesis and purification of alkyldiphenylmethane hydrocarbons I : 2-methyldiphenylmethane, 3-methyldiphenylmethane, 2-ethyldiphenylmethane, 4-ethyldiphenylmethane and 4-isopropyldiphenylmethane
Correlation of physical properties with molecular structure for dicyclic hydrocarbons II : 2-alkylbiphenyl and the two isomeric 2-alkylbicyclohexyl series
Synthesis of cyclopropane hydrocarbons from methylcyclopropyl ketone II : 2-cyclopropyl-1-pentene, cis and trans 2-cyclopropyl-2-pentene and 2-cyclopropylpentane
Frequencies of Color Morphs in Four Populations of Enoplognatha Ovata (Araneae: Theridiidae) in Eastern North America
Synthesis of cyclopropane hydrocarbons from methylcyclopropyl ketone I : 2-cyclopropylpropene and 2-cyclopropylpropane
Synthesis of cyclopropane hydrocarbons from methylcyclopropyl ketone III : 2-cyclopropyl-1-butene, cis and trans 2-cyclopropyl-2-butene, and 2-cyclopropylbutane
Synthesis, purification and physical properties of hydrocarbons of the naphthalene series I : 1-methylnaphthalene, 1-ethylnaphthalene, 1-butylnaphthalene, and 1-isobutylnaphthalene
Correlation of physical properties with molecular structure for some dicyclic hydrocarbons having high thermal-energy release per unit volume -- 2-alkylbiphenyl and the two isomeric 2-alkylbicyclohexyl series
Three homologous series of related dicyclic hydrocarbons are presented for comparison on the basis of their physical properties, which include net heat of combustion, density, melting point, boiling point, and kinematic viscosity. The three series investigated include the 2-n-alkylbiphenyl, 2-n-alkylbicyclohexyl (high boiling), and 2-n-alkylbiphenyls (low boiling) series through c sub 16, in addition to three branched-chain (isopropyl, sec-butyl, and isobutyl) 2-alkylbiphenyls and their corresponding 2-alkylbicyclohexyls. The physical properties of the low-boiling and high-boiling isomers of 2-sec-butylbicyclohexyl and 2-isobutylbicyclohexyl are reported herein for the first time
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