Previous data for the distribution of the n-alkyl carboxylic acids between aqueous buffers and heptane have suggested that the free energy of transfer between the two solvents does not increase with the length of the alkyl chain beyond palmitic acid, indicating a limit to the hydrophobicity of the alkyl chain at a length of about 15 carbon atoms. It is shown in this paper that previous measurem...

Force-area isotherms were obtained for hexadecanoic, octadecanoic, eicosanoic, and docosanoic acid monolayers at different compression rates. Equilibrium spreading pressures were determined both by monolayer collapse and by spreading from the bulk phase. Monolayers formed metastable phases at all pressures above their equilibrium spreading pressures and at all surface areas smaller than the sur...

background: this review was performed to evaluate the trend of alcohol use, characteristics of consumers, alcohol use disorders and toxic alcohol intoxications in bangladesh. in addition, sources and sales figures of alcoholic beverages, and number of legal permits issued for alcohol consumption are reported and analyzed. methods: a narrative search was performed on available medical literature...

The linear compressibility of two-dimensonial fatty acid mesophases has been determined by grazing incidence x-ray diffraction. The unit cell parameters of the L2, L ′ 2, L ′′ 2 , S and CS phases of behenic acid CH3 − (CH2)20 − COOH and of the L2 phase of myristic acid CH3 − (CH2)12 − COOH were determined as a function of surface pressure and temperature. Surface pressure vs molecular area isot...

The physico-chemical properties of oil from Moringa oleifera seeds from India were determined in the present study. The petroleum ether extracted oil ranged from 27.83 - 45.07% on kernel basis and 15.1-28.4% on whole seed basis in 20 different clones. Leaves and pods showed a good source of vitamin C. Oleic acid (C18:1) has been found to be the major fatty acid being 78.91-85.52% as compared to...

Carduus nutans L. is a biennial plant which is belonging to Asteraceae family known as musk or nodding thistle commonly. Carduus species includes different active ingredients like essential oil, resin, tannin, fatty oil, starch, flavonolignans, polyacetylenes. Importance of phytochemistry and chemical ecology researches increase gradually. The fat extraction was carried out by Soxhlet method wi...

The persistence of Monocrotophos (MCP) an extensively used Organophosphorous pesticide in environment and its toxic effect on biota necessitate its removal. A soil fungus capable of utilizing or breaking down MCP was isolated from a site contaminated by the same pesticide. The fungus Aspergillus sp. was inoculated into the medium with 0.5% MCP. After 8 days of incubation the biodegradation of M...

Solid lipid nanoparticles (SLN) of fatty acids (FAs) were prepared with a new, solvent-free technique based on FAs precipitation from their sodium salt micelles in the presence of polymeric non-ionic surfactants: this technique was called 'coacervation'. Myristic, palmitic, stearic, arachidic and behenic acid were employed as lipid matrixes. Spherical shaped nanoparticles with mean diameters ra...

Intravenous injections of various fatty acids in rabbits caused marked thrombopenia lasting 1-2 hr. The most active saturated fatty acids were myristic acid (14:O) and lauric acid (12: 0). Activity decreased with increasing and decreasing chain length, but behenic acid (22 : 0) had, on a molar basis, activity similar to that of lauric acid. Of the unsaturated fatty acids, oleic acid (18: 1) was...