The method is based on the measurement of color changes in phenol red barbital buffer in heptane-ethanol. It has been applied to human serum and to incubation media containing fatty acids liberated from rat epididymal adipose tissue. The values obtained were found to agree with those using the titrimetric method, within the limit of experimental error. A PROCEDURE FOR the determination of long-...

The title compound, {[Cd(C(8)H(8)O(5))(C(10)H(8)N(2))]·H(2)O}(n), was obtained by the reaction of cadmium acetate with 2,2'-bi-pyridine and 7-oxabicyclo-(2.2.1)heptane-2,3-dicarb-oxy-lic anhydride. The Cd(II) atom is seven-coordinated in a distorted penta-gonal-bipyramidal configuration, defined by five O atoms from the carboxyl-ate groups of three 7-oxabicyclo-[2.2.1]heptane-2,3-dicarboxyl-ato...

High-pressure Raman scattering studies at ambient temperature are performed on n-heptane. We observe a liquid-solid transition around 1.5 GPa from the changes in the Raman spectra. This has been reported in earlier works. With increasing pressure, we observe large changes in the Raman modes and the spectra show a distinct change around 7.5 GPa. This marks the solid-solid transition at 7.5 GPa o...

A study was performed to elucidate the mechanisms of extinction and autoignition of n-heptane in strained laminar flows under non-premixed conditions. A previously developed detailed mechanism made up of 2540 reversible elementary reactions among 556 species was the starting point for the study. The detailed mechanism was previously used to calculate ignition delay times in homogeneous reactors...

Results of a detailed numerical analysis of an n-heptane/air edge flame are presented. The equations of a low-Mach number reacting flow are solved in a two-dimensional domain using detailed models for species transport and chemical reactions. The reaction mechanism involves 560 species and 2538 reversible reactions. We consider an edge flame that is established in a mixing layer with a uniform ...

Absorption of four amide local anaesthetics, including a new experimental agent, ropivacaine, in n-heptane, rat sciatic nerve and human extradural and subcutaneous fat was studied in vitro. The relative n-heptane/buffer (37 degrees C) partitioning of bupivacaine:etidocaine:lignocaine:ropivacaine was 10:39:1:2.9. The absorption of bupivacaine and etidocaine into nerve tissue was identified at st...