This study was conducted to analyze water quality in a coastal province of Vietnam. Multivariate statistical methods, namely cluster analysis (CA) and principal component (PCA) were utilized. Twelve parameters, pH, dissolved oxygen (DO), total suspended solids (TSS), biological demand (BOD), chemical (COD), nitrite (N-NO2−), nitrate (N-NO3−), ammonium (N-NH4+), orthophosphate (P-PO43−), chlorid...

The influence of the sodium salts of various anions on the spectral properties of acid ferricytochrome c was investigated. It was found that chaotropic anions convert the high spin form of the enzyme into a mixed spin spectral type. The following order of efficiency was established: TBA> TCA> C104> SCN> NO3> Br> Cl(where TBAand TCArepresent tribromoacetate and trichloroacetate ions, respectivel...

Abstract: Bismuth(III) compounds (BiX3, X = Cl, Br, NO3 and OTf etc.) are moistureand air-tolerant Lewis acids, which have been widely applied as green catalyst in diverse organic synthesis in the past few years. This review illustrates significant advances in this field over recent five years, and mainly focuses on the bismuth-catalyzed formation of carbon-carbon, carbon-nitrogen, carbon-sulfu...

Chloride homeostasis in Saccharomyces cerevisiae has been characterized with the goal of identifying new Cl- transport and regulatory pathways. Steady-state cellular Cl- contents ( approximately 0.2 mEq/liter cell water) differ by less than threefold in yeast grown in media containing 0.003-5 mM Cl-. Therefore, yeast have a potent mechanism for maintaining constant cellular Cl- over a wide rang...

in the present study, 45 rainwater samples were collected from february to december 2012 on event basis in east bokaro coal mining environment. physico-chemical and major ionic compositions of rainwater samples as well as water soluble major ion composition were analyzed to employ principle component analysis for source identification. the average ph value was recorded 6.1 and varied from 5.1 t...

A p-nitrophenolate-sensitive membrane electrode was constructed by using tetraheptylammonium chloride as an ion-exchanger and o-nitrophenyl phenyl ether as a membrane solvent. The electrode responded to p-nitrophenolate down to 1 ,ƒÊM in a buffer solution of 0.1 M Na2CO3NaHCO3 (pH 10). The selectivity coefficients of the electrode to typical anions increased in the following order: Cl-<NO3< SCN...

In this work, Ag2CO3 was prepared via a solution-based method and further characterized by XRD, Raman spectroscopy, SEM/EDS analysis, UV-VIS spectroscopy. SEM results revealed the formation of micro-sized particles with rectangular shape. The photocatalytic activity catalyst evaluated in degradation 4-tert-butylphenol (4-t-BP) under simulated solar light irradiation. effects 4-t-BP initial conc...

Hydrochemical assessment of the freshwater lakes provides important insights into sources dissolved ions, geochemical processes, and anthropogenic activities taking place in environment. This study focuses on hydrochemistry water quality Kupinde Lake, Karnali Province, Nepal. Surface samples were collected from 24 different locations lake October 2021 analyzed for 18 physico-chemical parameters...

The crystal and molecular structure of the title compound,C24H36CoN10O(4).2(NO3).3(H2O).Cl, have been determined by X-ray analysis: Cc (No: 9), a = 17.6920(4) A, b = 11.8163(2) A, c = 16.4752(4) A, Beta = 91.679(1) degrees , Z = 4. The Co(III)ion is six-coordinated with octahedral geometry, the pyridine rings are planar and the piperazine rings assume chair conformations.

Groundwater from remote parts of the Middle Rio Grande Basin in north-central New Mexico has perchlorate (ClO4-) concentrations of 0.12-1.8 micro/L. Because the water samples are mostly preanthropogenic in age (0-28000 years) and there are no industrial sources in the study area, a natural source of the ClO4- is likely. Most of the samples have Br-, Cl-, and SO4(2-) concentrations that are simi...