Serine palmitoyltransferase (EC 2.3.1.50) catalyzes the first unique reaction of sphingolipid biosynthesis. Activities were determined with different fatty acyl-CoA substrates to describe the range of long-chain bases that could be made by rat brain microsomes. The activities were greatest with palmitoyl-CoA and palmitelaidoyl-CoA, followed by fully saturated homologs differing from these by on...

Room temperature ionic liquids, which have unique properties such as a relatively wide electrochemical stability window and negligible vapor pressure, are promising candidates as electrolytes for developing lithium−air batteries with enhanced performance. The local current density, a crucial parameter in determining the performance of lithium−air batteries, is directly proportional to the rate ...

Alkyl betaines and alkyl dimethylamine oxides have been shown to have pronounced antimicrobial activity when used individually or in combination. Although several studies have been conducted with these compounds in combinations, only equimolar concentrations of the C(12)/C(12) and C(16)/C(14) chain lengths for the betaine and the amine oxide, respectively, have been investigated. This study inv...

Amine intercalated titanates were synthesized by direct exchange of potassium ions of K2Ti4O9 by alkyl ammonium ions of various alkyl chain lengths. These intercalated solids exfoliate well in alcohols of different alkyl chain lengths and non-polar solvents such as toluene and hexane to yield colloidal dispersions of titanate nanosheets. The longer the alkyl chain of the intercalated amine the ...

A number of alkyl and acyl derivatives of 4-dihydro-4-deoxy-4(R)-amino spectinomycin were tested against various Escherichia coli strains, possessing different susceptibilities to spectinomycin. The influence of the lipophilicity and the length of the side chain substituents of the derivatives was compared to both minimal inhibitory concentration values and stability to adenyltransferase. Deriv...

Zinc oxide (ZnO) is a semiconductor with various physicochemical properties allowing its use in wide range of technological applications. The aim this work to study nanocrystalline ZnO thin-film deposited using zinc salt which dissolved pure ionic liquids (ILs). latter play dual role: solvent and supporting electrolyte. Most ILs have large electrochemical window sufficient conductivity. In work...

The homologous series of the ionic liquids 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [CnC1im][NTf2] (n = 2,4,6,8 and 10) was studied by polarization-resolved second harmonic scattering (SHS). analysis polarization plots clearly demonstrates that SHS response is dominated an octupolar contribution. Orientational correlations are observed on nanometer scale in all investigate...