Coordination polymers of Ln(III): Synthesis, characterization, catalytic and antimicrobial aspects

Coordination polymers of HEAP-ED with La(III), Pr(III), Nd(III), Sm(III), Gd(III), Tb(III) and Dy(III) metal ions have been synthesized and characterized by elemental analyses, electronic spectra, magnetic susceptibilities, FTIR, NMR, scanning electronic microscopy (SEM) and thermogravimetric analyses. Catalytic activity of selected coordination polymers was examined for pharmaceutical important organic synthesis. Antimicrobial activity of isolated Ln(III) coordination polymers against Escherichia coli, Bacillus subtilis, Staphylococcus aureus (bacteria) and Saccharomyces cerevisiae (yeast) were measured. It was observed from the study that the Ln(III) coordination polymers acted as an efficient and effective catalysts and antimicrobial agents.     

Gel electrophoretic procedures potentially applicable to the isolation of human growth hormone from a transformed bacterial source at the gram-preparative scale

A crude bacterial extract containing approximately 4 mg/ml protein, 25% of which was human growth hormone (hGH), was subjected to two alternative gel electrophoretic isolation procedures, designated I and II. Procedure I exploits the high electrophoretic net mobility (RM larger than 0.127) at pH 7.6, 0 degrees C, of the bacterial contaminants relative to hGH. This allows one to stack the contaminants at a protein load of 31.5 mg/cm2 of gel, using a "non-restrictive" gel concentration. Unstacked hGH is collected from the gel section between 0.3 and 0.6 of relative gel length and extracted electrophoretically as described previously. Alternatively, the unstacked hGH was concentrated on the gel by dispatching a second moving boundary behind the original stack ("re-stacking") and a gel section (relative gel length 0.45 to 0.6) between the two moving boundaries was excised and subjected to electrophoretic extraction. The yield of hGH ranged from 70 to 82%, and its purity (weight/Lowry) ranged from 86 to 115%. Procedure II exploits the high electrophoretic net mobility (RM larger than 0.064) at pH 10.5, 0 degrees C, of hGH relative to its bacterial contaminants at a gel concentration of 9 %T, 2 %CBis, at a protein load of 2.5 mg/cm2 of gel. The selectively stacked hGH is collected by preparative elution-PAGE, using an apparatus with 17.6 cm2 gel surface area. The yield of hGH was 90% and its purity ranged from 84-92%.     

The inactivation ofBacillus subtilis transforming DNA by mutagenic agents

The inactivation of three genetic markers inBacillus subtilis transforming DNA by UV rays, nitrous acid and hydroxylamine was studied. The inactivation of markers by UV and HNO₂ was marker specific, whereas the hydroxylamine inactivates the markers approximately to the same degree.     

BIOSYSTEMATIC STUDIES IN THE BOUTELOUA CURTIPENDULA COMPLEX. I. THE ANEUPLOID RHIZOMATOUS B. CURTIPENDULA OF TEXAS

Gould , F. W., and Z. J. Kapadia . (A. & M. College of Texas, College Station.) Biosystematic studies in the Bouteloua curtipendula complex. I. The aneuploid rhizomatous B. curtipendula of Texas. Amer. Jour. Bot. 49(8): 887–891. Illus. 1962.—Widespread throughout central U.S. is a rhizomatous form of B. curtipendula that basically is tetraploid (2n = 40). In the southwest the predominant type is a caespitose aneuploid with a high chromosome number (2n = ca. 80 to 2n = ca. 102). The present study has shown the presence of an extensive series of rhizomatous aneuploids in central Texas, with chromosome numbers ranging from 2n = 41 to 2n = 64. The distribution of these plants is centered about the region of overlap in the ranges of the 2 previously mentioned types. Available evidence indicates that the rhizomatous aneuploids have arisen through hybridization of the caespitose aneuploids and the rhizomatous tetraploids.     

Melovinone,an open chain analogue of melochinone from Melochia tomentosa

Melovinone, a new alkaloid isolated from the roots of Melochia tomentosa has been characterized as 3,7,8-trimethoxy-2-methyl-5(5′-phenylpentyl)-4-quinolinone.     

A stochastic compartmental model with continuous infusion

This paper deals with stochasticm-compartmental systems with continuous time-dependent infusions into all compartments and reversible time-independent flows between any two compartments. A methodology for the first two moments of the distribution of the number of units in the different compartments at any point in time is outlined without resorting to the usual techniques of generating functions and inverse Laplace transforms. A possible application to a systems analysis of the kidney transplant system is discussed.     

Biology and comparative predation efficacy of three heteropteran species recorded as predators ofBemisia tabaci in Maharashtra

Two mirids,Deraeocoris sp. andCampylomma nicolasi Reuter and one lygaeid,Geocoris ochropterus Fieber were found preying onB. tabaci (Gennadius) for the first time in Maharashtra State of India during 1987–88. Their biology and predation capacity onB. tabaci were studied in detail under laboratory conditions. The nymphal stage ofDeraeocoris sp. passed through 6 instars, whereas 5 instars in case of the remaining species.G. ochropterus, Deraeocoris sp. andC. nicolasi consumed on an average 482.5, 275.3 and 128.8 nymphs of 57.3, 25.5 and 20.6 days, respectively. On the basis of consumption rate per day,Deraeocoris sp. proved to be a superior predator. Part of Ph. D. Thesis submitted to Marathwada Agricultural University, Parbhani 431402, India.