High Temperature Carbonization of Coal

It is defined as heating the coal in absence of air to a final solid mass temperature of 900 degree Centigrade and above. It is the only method of producing hard coke from coking coal with better size consistency, hardness and richer in fixed carbon content to cater the needs of the blast furnace, foundry, and chemical industry

On some generalized ageing orderings

Some partial orderings which compare probability distributions with the expo- nential distribution, are found to be very useful to understand the phenomenon of ageing. Here, we introduce some new generalized partial orderings which de- scribe the same kind of characterization of some generalized ageing classes. We give some equivalent conditions for each of the orderings. Inter-relations among the generalized orderings have also been discussed

The bacterium, Staphylococcus aureus induced chromosome aberrations with their protection by penicillin, and mitotic inhibition in Syrian hamsters

The frequency of bone marrow chromosome aberrations in Syrian hamster, Mesocricetus auratus induced by the injection of log culture, saline suspension and culture filtrate of S. aureus was significantly high while the treatment of heat-killed bacterial suspension showed no difference with control data. In the first three treated series aberrations were of individual and gross types while others had only individual types. The chromatid breaks were nonrandom, the centro-meric region being less vulnerable and the distal region was more susceptible. The aberration frequency was significantly reduced when log culture, saline suspension and culture filtrate treated specimens were also injected with penicillin 1 hr before simultaneously and 1 hr after, of which the post-treatment rendered the maximum protection. Lastly, the treatment of isolated bacterial sample retarded the mitotic frequency significantly as compared to that of normal and controls

Nueva especie de Trissopelopia Kieffer, 1923 (Diptera, Chironomidae, Tanypodinae, Pentaneurini) de la India

The pupae and adults of Trissopelopia bifurcata sp. n. are recorded and described from the Darjeeling Himalayas of India. The genus is recorded for the first time in India. A new key to the world species of Trissopelopia is also included.Se describen las pupas y los adultos de Trissopelopia bifurcata sp. n. procedentes del Darjeeling Himalayas (India). Es la primera cita del género en la India. Se proporciona, asimismo, una nueva clave mundial de las especies de Trissopelopia