Trimethyl (octadecyl) ammonium and it's salts is widely used as a cationic surfactant. In this study, an analytical method for trimethyl in sediment by liquid chromatography tandem-mass spectrometry (LC-MS/MS) was developed. method, measured chloride. The detection limit (MDL) quantification (MQL) were 0.00026 μg/g-dry 0.00069 μg/g-dry, respectively. This able to measure the organic or inorgani...

An overview of the occurrence, distribution and contamination of inorganic chemical substances in various environmental compartments and the rates of flow between these will be given. In an ecosystem the pathways and location of elements can be influenced in a specific manner by the organisms, e.g. by selective uptake and enrichment of the inorganic substances. Special emphasize is placed on th...

Chelating is the chemical process by which a mineral (iron, cobalt, copper, zinc, and manganese) is combined with a mixture of amino acids and peptides. The resulting substances are known as chelates. Another descriptive term, proteinates, refers to the amino acid bond. These chelated minerals are thought to be more digestible than nonchelated forms. In other words, chelation makes the minerals...

• To describe the process of setting Guideline Values for inorganic parameters and describe the narrow divide between toxic and essential elements. • To describe some basic physico-chemical characteristics of water. • To provide some examples of inorganic chemicals to illustrate the uses of GVs for inorganics and highlight priority substances. • To describe the basis of monitoring of physical a...

The Residue on Ignition Test specified in General Tests, Japanese Pharmacopeia is a method to measure the weight of the residual substance not volatilized when the sample is ignited under a constant condition. Generally, this test is intended to determine the content of inorganic substances contained as impurities in an organic substance, and, occasionally, to determine the amount of inorganic ...

The microscopic description of spin-Peierls substances is discussed. Particular attention is paid to the ordered (dimerised and incommensurably modulated) phases. Important points are the adiabatic and the antiadiabatic approach, generic soliton forms, elastic and magnetic interchain couplings. The wealth and the accuracy of experimental information collected for the first inorganic spin-Peierl...

In some ways the effects of hexylresorcinol on Nitella resemble those of guaiacol but in others they differ. Both substances depress the P.D. reversibly and both decrease the potassium effect. Hexylresorcinol decreases the apparent mobility of Na(+) and of K(+). Guaiacol increases that of Na(+) but not of K(+). The action of hexylresorcinol is more striking than that of guaiacol since 0.0003 M ...

By using radioactive isotopes in tissue cultures, the rate of permeation of substances into cells can be measured independently of concurrent metabolic reactions of these substances. Techniques of obtaining and analyzing data are described. Examples are given using radioactive potassium and phosphorus. Using cultures of chick embryo muscle, turnover time for cell potassium is 6 hours, and for c...

Shah, Rai Bahadoor. These tables have been drawn up in accordance with the Indian Pharmacopoeia of 1868. They indicate the dose of each substance suitable for an adult, but Gaubin's and Young's methods of regulating the dose according to age are given. The articles are divided into main groups of inorganic substances, organic substances, and pharmacopoeia! groups, and these three divisions are ...

The field of uremic toxicity comprises the study of a large number of different substances, classified in relation to various characteristics, for example, protein-binding, dimensions, and so forth. The endogenous compounds of a gaseous nature have received much attention lately from the scientific community because of their increasingly recognized importance in health and disease. Among these ...