A method was developed for the determination of anions and cations (Na~ , NH~ _4, K~ , Mg~(2 ), Ca~(2 ), Cl~-, Br~-, NO~-_2, NO~-_3 and SO~2-_4) in cosmetics by using ion chromatography with conductometric detection. The eluent for determining anions was 1,2,4,5-...
The identification and determination of relative ratios of cations and anions in various food products were determined by ion chromatography. All samples studiedwere fresh and intact fromthe commercial containers.Where appropriate the samples were diluted in distilled water before injection into a Metrohm...
Functional analysis in Xenopus oocytes revealed that two types of subunits with predicted distinct ion selectivities form homopentameric nicotinic ACh receptor (nAChR) subtypes conducting either cations or anions. Phylogenetic analysis of the nAChR gene sequences suggests that molluscan anionic nAChRs ...
3. You should obtain ALL reagents (solutions, solids, liquids) and supplies (splints, test tubes etc.) required to do ALL of the preliminary tests (P tests) for the cations and the anion at the start of the lab period. Do not obtain excessive amounts of any ...
The equiline diagrams and ionic ratios suggesting silicate minerals weathering, ion exchange, and evaporation are the dominant factors controlling the water chemistry in the area. The domination of cations and anions was in the order of Na + > Ca 2+ > Mg 2+ > K + for cations and Cl ...
The groundwater chemistry is dominated by silicate weathering and (Na + Mg) and (Cl + SO 4 ) accounts of about 90% of cations and anions. The contribution of (Ca + Mg) and (Na + K) to total cations and HCO 3 indicates the domination of silicate weathering as major sources for ...
The binding is unaffected by 1 m M concentrations of the anions sulfate, chloride, bromide, thiocyanate, phosphate, acetate, nitrate, or carbonate and the monovalent cations potassium or ammonium. However sodium and the divalent cations copper, cobalt, zinc, cadmium, and manganese decrease binding ...
The effect of cations and anions on the enzymatic activity of LipC12 was also investigated. For analyses involving cations, the enzyme at 250 nM was previously incubated with 1 mM EDTA/50 mM Tris-HCl pH 7.5 for 1 h in order to remove cations from the enzyme. Then 20 μL of enzyme so...
S6 ). CaPAP7 showed activity in the temperature range of 25–45 °C and pH range of 4–6 (Fig. 6). Its high phosphatase activity in acidic pH confirmed it as APase. Further, activity assays with different divalent cations and anions revealed no specific cofactor preference of CaPAP7....
The mechanisms of cellular transport, involved in proximal tubular secretion of organic anions and cations, have been investigated in detail and are reviewed elsewhere (Pritchard and Miller, 1992; Roch-Ramel et al., 1992; Roch-Ramel and Diezi, 1997; Koepsell, 1998). The p-aminohippurate (PAH...