Volume 70, Issue 1
July 1969, pages 1-54
pp 1-8 July 1969
1. Alkaline phosphatase activity and the ATPase activities of myosin and sarcoplasmic proteins were studied in the fatigued and unfatigued muscles of frog. Alkaline phosphatase activity was lowered in crude fatigued muscle homogenate. Myosin ATPase activity was unaffected on fatigue; but sarcoplasmic ATPase was lowered considerably in the fatigued muscle.
2. The alkaline phosphatase activity of unfatigued muscle homogenate decreased after dialysis and that of fatigued muscle homogenate increased after dialysis.
3. Extraneous addition of ascorbic acid to the dialyzed homogenate was found to have a promotory effect on the alkaline phosphatase activity of both the muscles.
4. Addition of lactic acid to the dialyzed homogenate, inhibited the alkaline phosphatase activity of both the muscles.
5. The decrease in the alkaline phosphatase activity on fatigue was discussed in relation to the promotory role of ascorbic acid and inhibitory role of lactic acid.
pp 9-14 July 1969
Thirteen substituted pyrimidines have been screened for their tumour inhibitory activity against three transplantable tumours. The screening methods utilised in the study have been given. Four of the compounds have been found to possess significant tumour inhibitory activity.
pp 15-27 July 1969
Aluminous augite from an augite-pyroxenite occurring as a lens in the pyroxene granulites of the charnockite rocks, interbedded with garnet-sillimanite gneisses, quartzites and calc-granulites, is described. The presence of high aluminium in the augite indicates high temperature and pressure conditions of crystallisation and suggests that the ultrabasic and basic members of the charnockite rocks of Visakhapatnam have crystallised from an olivine tholeiitic magma.
pp 28-36 July 1969
An examination of the epidermal characteristics of leaves, sheaths and culms of five species ofRhynchospora reveals silica materials occurring in different interesting forms, sizes and patterns of organiwise distribution in particular combination. These silica materials are designated as silica deposits and considered atypical in contrast to the conventional types of cone-shaped silica bodies surrounded by the satellites or no satellites. Eleven different types of silica deposits have been recognized whose characteristics, specieswise representation have not only been described but also their diagnostic importance has been indicated.
pp 37-41 July 1969
PSMV-affected pigeon pea generally had a lower level of calcium, the decrease being conspicuous in older leaves than healthy counterparts. Potassium level decreased in diseased leaves at all ages, petiole, stem and root than comparable healthy tissues. Sodium level was significantly lower in fourth and fifth leaves in diseased plant. Diseased leaves had a lower level of manganese at all ages than healthy counterparts.
pp 42-54 July 1969
The utilization of nitrate and ammoniacal sources of nitrogen byS. rolfsii andS. oryzae have been compared with reference to growth rate over a period of time and drift in pH of the culture solutions. The results indicate that utilization of ammoniacal nitrogen by the twoSclerotium spp. is governed more by the availability of ammonia acceptors rather than by critical pH, limiting growth.