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375  Articles
1 of 39 pages  |  10  records  |  more records»
The increasing number of laundry businesses in Pontianak causes increased laundry waste, which is dangerous for health and the environment because anionic surfactants such as Linear Alkylbenzene Sulfonate (LAS) are hard degradable. Photocatalyst is a meth... see more

An unsaturated alkylamide namely ZP-amida F, was isolated from the fruit of Zanthoxyllum acanthopodium. Discovery of this compound is first time in this plant. Determination of the structure using 1H-NMR and comparison with standard.

Các alkyl 2-oxocyclopentancarboxylat ph?n ?ng v?i mangan(III) acetat dihydrat trong s? có m?t c?a 1,1-diaryleten d? cho các alkyl 4,4-diaryl-1-hydroxy-2,3-dioxabicyclo[4.3.0]nonan-6-carboxylat v?i hi?u su?t cao. Các nhóm th? trên nhân thom c?a alken ... see more

The intensive use of antibiotics in patient care institutions often without determining specificity and sensitivity to them leads to more rapid development of resistance to pathogens of nosocomial infections; that is why it is one of the urgent problems o... see more

The effective method for the synthesis of ethyl 3-alkyl-5-methyl-4-oxo-2-thioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidine-6-carboxylate derivatives by interaction of diethyl 3-methyl-5-{[(methylsulfanyl)carbothioyl]amino}thiophene-2,4-dicarboxylate with l... see more

By alkylation of 3-amino-5-methyl-4-oxo-N-aryl-2-thioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidine- 6-carboxamides with substituted benzylchlorides and chloroacetic acid the series of novel derivatives of 3-amino-5-methyl-2-(alkylthio)-4-oxo-N-aryl-3,4-dih... see more

It has been shown that the ternary condensation of oxaloacetic ester (diethyl 2-oxosuccinate), aromatic aldehydes and 3-amino-1,2,4-triazole or 5-aminotetrazole in dimethylformamide results in formation of the corresponding diethyl 7-aryl-4,7-dihydro... see more

The article describes the study of the alkylation reaction of aromatic acids hydrazides with (±)-cis-3-dichloromethyl-1,2,2-trimethylcyclopentancarboxylic acid. The acid mentioned is a new substance obtained by oxidative cleavage of racemic camphor i... see more

Some factors such as the changes of the stationary phase, temperature, pH-value, mobile-phase composition and flow rate play a crucial role in effecting the sensitivity of retention times in high performance liquid chromatography (HPLC) system. Utilizing ... see more

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