Effects of Alkali on Water Soluble Hexavalent Chromium in Ordinary Portland Cement.

Due to the toxicity and mobility of chromium, the disposal of chromium-containing waste is a pressing issue. Co-processing of chromium-containing waste in a cement kiln is currently one of the most effective methods. However, the presence of water-soluble hexavalent chromium (Cr(VI)) in cement limits the use of this method.

cis-4-(Tosyl-oxymeth-yl)cyclo-hexa-ne-carboxylic acid.

The title compound, C(15)H(20)O(5)S, is an inter-mediate in the synthesis of novel amino-carboxylic acid derivatives. The cyclo-hexane ring exhibits a chair conformation. In the crystal structure, adjacent mol-ecules form dimers via O-H⋯O hydrogen bonds.

[Preparation of contraceptive pill microcapsule and its anti-fertility effect].

The main component of this pill is 2-Octadecanoic acid-4-Palmitic acid-2, 4-Pentanediyl ester separated from chloroform extract of neem oil. The microcapsules coated by the re-curdle method were fabricated with an average particle size of 100-180 microm. The morphological characteristics, incorporation efficiency, carrier reclamation efficiency of the microcapsule were investigated.