Rainwater (RW) over the Calabar metropolis was analyzed to establish its chemistry, influences, and agricultural suitability. Sampling done in rainy dry seasonal cycles for three years (2018–2020). pH, electrical conductivity (EC), major ions (Ca2+, Na+, Mg2+, K+, HCO3-, Cl-, SO42-) were registered principal component analysis (PCA) ionic ratios used relationships between species project their ...

The hydrochemical characteristics and variation rules of water in karst areas are important for the basic research field. Because only a few researches focused on humid subtropical dolomite basins past, Shanmuhe Basin its subbasin Huangzhouhe Shibing Dolomite Karst World Natural Heritage Site China were selected as study area. A total 215 samples collected analyzed. It was found that type basin...

Preparations of pyruvate carboxylase catalyse the cleavage of MgATP in the absence of pyruvate and acetyl-CoA. The rate of this cleavage is higher in the presence of HCO3- than in its absence. Incubation of the enzyme preparations with an excess of the pyruvate carboxylase inhibitor, avidin, completely abolishes the pyruvate carboxylating activity of the enzyme preparations but only abolishes t...

the complexation reactions between mg2+, ca2+, sr2+ and ba2+ metal cations with 15-crown-5 (15c5) were studied in acetonitrile (an)-methanol (meoh) binary mixtures at different temperatures using conductometric method. 15c54 forms 1:1 complexes with mg2+, ca2+ and sr2+ cations in solutions. the ma2+ cation forms a 2:1 complex (ratio of lighand to cation) in solutions. a linear relation was obse...

In order to investigate the hydrochemical characteristics and their controlling factors, 212 water samples from Yarlung Tsangpo River its tributaries were collected over three precipitation periods in 2018 analyzed using mathematical statistics, Gibbs ion ratio methods, principal component analysis. The results showed following: (1) cations mainly Ca2+, Na+ Mg2+, anions HCO3− SO42− predominant,...

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...

Thirty groundwater samples were taken from Assiut’s northern outskirts. The physicochemical properties of these investigated. For the evaluation water–rock interaction, saturation index (SI), chloro-alkaline indices (CAI1 and CAI2), Gibbs ratios for cations anions (GC GA), principal component analysis (PCA), hierarchical cluster (HCA) used. (1) With exception five that supersaturated, rest unde...

The present study was carried out near an industrial area with a high-density urban population and large-scale agricultural activities. These anthropogenic activities lead to groundwater pollution depletion of the water table. This attempted classify sources hydrochemical facies that help ensure suitability for agriculture drinking. Irrigation indexes, quality index (WQI), principal component a...