Spherical collapse with heat flow and without horizon

We present a class of solutions for a heat conducting fluid sphere, which radiates energy during collapse without the appearance of horizon at the boundary at any stage of the collapse. A simple model shows that there is no accumulation of energy due to collapse since it radiates out at the same rate as it is being generated.Comment: RevTeX, 3 page

Glimpses of the Emerging Technology, Genetic Engineering, and its Applications in Medical Sciences

The history of development of the Genetic Engineering Technology has been brought out with a brief description of the current status of some of the techniques used in gene cloning. The achievements and potential applications of the technology in medical sciences and its possible impact on the Society in future have been discussed, as far as possible, in a semitechnical language

Morphological changes of Vibrio cholerae organisms in glucose saline

Morphological changes in Vibrio cholerae harvested from 18 hr growth on nutrient agar surface and incubated in glucose saline at 37° have been studied by electron microscopy using metal shadowing, uranyl staining and thin sectioning techniques. Within the 6 hr incubation period, a vacuolar region has been found to separate the cell wall from the protoplasmic body presumably at one polar end. Subsequently such separation has been found all round the periphery of the protoplasmic body, which assumes a round form of average dimension 0.4 ± 0.05 µ. Within the 24 hr incubation period, majority of the cells (60 to 70 %) are rounded and of these a significant fraction (15 to 20 %) contained bodies limited by one single membrane. It is suggested that these bodies represent the protoplasts of V. cholerae

Pilot Plant Studies on the Production of Metallurgical Coke

Coke is an essential raw material for the manufacture of iron by the conventional blast furnace technique. Due to the paucity of reserves of high grade, coking Coals suitable for the production of metallurgical coke a rational use of these types of coals and utilization of increasing proportions of substandard coals for coking are receiving seriqus consideration in most countries in the world