Volume 79, Issue 3
March 1974, pages 103-146
pp 103-109 March 1974
Gelatins from the adductor muscles of two species of bivalve molluscsAmussium pleuronectes andMeretrix meretrix were prepared and the amino acid composition and the carbohydrates associated with the gelatins were estimated.
The possible role of collagen in the adductor muscle is indicated.
pp 110-119 March 1974
The present investigation was aimed to evaluate the effectiveness of nine herbicides in the control of weeds associated with Japanese mint (Mentha arvensis) crop. The chemical method of weed control used in this investigation was found to be very effective in preventing weed growth in the mint crop. As a result of herbicidal treatment, the weeds underwent a marked reduction in their dry matter accumulation, coupled with a significant increase in the yield of mint herb and mint oil.
Of the different herbicides embutox plus applied as post-emergence treatment and tok E-25 applied in the pre-emergence stage were found to be effective weed-killers, contributing a significant increase in mint foliage and oil yields. Telvar was similarly effective on application at the post-emergence stage. Other herbicides,viz., 2, 4-D and bladex-O also yielded useful responses.
pp 120-126 March 1974
pp 127-138 March 1974
Sclereids of one type or the other in various combinations within the mesophyll of the several taxa of Hamamelidaceae are described in this paper. Furthermore the study suggests that the typology of sclereids in a few taxa segregated under taxonomic sub-division could be utilised for evaluating the systematic value either for singling out a species or group of species within a genus and may also prove to be taxonomically significant in solving problems of synonymy.
pp 139-146 March 1974
Changes in the physico-chemical, bacteriological and algal characteristics of raw sewage brought about by inoculatingAnacystis nidulans under laboratory conditions have been studied in detail. There was a gradual increase in pH, phenolphthalein alkalinity and dissolved oxygen value. The higher the phenolphthalein alkalinity, the greater is the production of oxygen due to photosynthesis. Considerable reduction in biochemical oxygen demand was observed. The alga utilizes ammonia as the principal source of nitrogen for protein synthesis, but probably it does not utilize nitrate for its growth. With an increase in the algal density there was a rapid decline in the numbers of total bacteria.
The results of the present investigation suggest that a period of three days is sufficient for the treatment of sewage byAnacystis nidulans.