Several effective methods for bacterial cell transformation have previously been described. These methods involve treatment of cells with CaCl2 (1-5) or cobalt hexamine chloride (6). Agents such as polyethylene glycol (PEG) have also been shown to induce bacterial cell transformation (7). We now describe a new method for the preparation of competent bacterial cells that yields high transformati...

The complexation of anions of selected α-amino acids (alanine, valine, proline, tyrosine) and small peptides (L-alanyl-L-alanine, L-alanyl-L-alanyl-L-alanine, and L-alanyl-L-alanyl-L-alanyl-L-alanine) by the dinuclear nickel(II) complex [LNi2(μ-Cl)]+ (1), where (L)2− represents a 24-membered binucleating hexamine-dithiophenolato ligand, has been investigated. The following complexes were prepar...

The sites of action of ketamine (CI-581 ; 2-(0-chlorophenyl)-2-methylamino cyclo-hexamine HCI) were determined in the central nervous system using electrophysiological techniques in both acute and chronic cat experiments. It was demonstrated in chronic preparations that the cataleptic anesthetic state induced by ketamine is accompanied by an alternating pattern of hypersynchronous delta wave bu...

Diuretic agents have been used in the treatment of several situations such as cardiopulmonary and urinary diseases in humans and animals, but they have not been extensively studied in poultry. Some Iranian poultry producers traditionally use urotropin (hexamine), alhagi (Camelorum fisch) and malt beverage to get therapeutic effect in broiler or laying hens. Diuretics may be used after drug ther...