adsorption of cations al, zn, fe, cr and pb from aqueous solution of hydrogen peroxide using ir-120 cation-exchange resin was studied. the removal percentage of the cations was examined by varying experimental conditions (such as ph of the hydrogen peroxide solution, temperature, contact time and dosage of adsorbent) in a stirred-batch system. under the optimal conditions (ph=1, t=25oc, contact...

overnight, the mixture was poured into ice-water, a syrupy product was produced, which was solidified on standing for several hours. This was filtered off and washed with water, and air dried; yielding was 14.1g. in 60% of theory. After several recrystallizations from CHCl3-EtOH, it melted at 201~202°;〔 α〕20D -35.6°(c=0.92, CHCl3), reported, m.p. 194°, 25) 199~200°, 26) 202~204°8);〔 α〕D -36.4°....

The spread of a steroid-containing foam from the rectum was studied in eight normal controls and eight patients with ulcerative colitis proved by biopsy. A standard dose of foam was labelled with technetium-99m adsorbed on to microspheres of Amberlite resin. Immediately after the foam was administered the extent of spread varied considerably, though in no instance did it extend beyond the recto...

an oral suspension could a suitable dosage form for the geriatric patients. the calcium alginate coated ion exchange resinate of propranolol hydrochloride were prepared using amberlite ir-120 by solvent evaporation. microcapsules of propranolol hydrochloride resinate were prepared by solvent evaporation technique,the suspensions were prepared by using deionised water as the vehicle. methyl cell...

Previous studies have shown that when Staphylococcus aureus becomes resistant to sulfonamides, an antisulfonamide substance is produced in the growth medium. Although these studies suggested that the substance was p-aminobenzoic acid (PABA), isolation and positive identification were not achieved. Because of the importance of these observations, unequivocal identification of the product was att...

A new complex of anti-Gram-positive antibiotics was produced by the fermentation of Actinoplanes arizonaensis sp. nov. The antibiotics were recovered from the fermentation broth with Amberlite XAD-7 resin and from the mycelium by acetone lysis. UV, IR, MS and NMR spectral studies characterized these compounds as kalafungin-type antibiotics. They differ from other known members by an unusual oxi...

SUZUKI, M., OSAWA, S. and HIRANO, M. A Lyeium Chinense Miller Component Inducing Ovulation in Adult Female Rabbits. Tohoku J. exp. Med., 1972, 106 (3), 219-231Intravenous injection of the crude extract from Lycii folium among components of Lycium chinense Miller induced ovulation in the adult female rabbit. Chemical properties of the active component of this crude extract were investigated by d...

Gamma irradiation is used on Penicillium cyclopium in order to obtain mutant cells of high L-asparaginase productivity. Using gamma irradiation dose of 4 KGy, P. cyclopium cells yielded L-asparaginase with extracellular enzyme activity of 210.8 ± 3 U/ml, and specific activity of 752.5 ± 1.5 U/mg protein, which are 1.75 and 1.53 times, respectively, the activity of the wild strain. The enzyme wa...

The respiration and germination of activated ascospores of Neurospora tetrasperma have been shown to be almost completely inhibited by concentrations of ethylene diaminetetraacetic acid (EDTA) as low as 0.0035 M. In contrast, however, dormant ascospores are insensitive to this chelating agent. At any time up to about 150 minutes after activation Ca(++) or Mg(++) can completely reverse this toxi...