Studies on the effects of mutagens on cytotoxicity behaviour in Pigeon pea (Cajanus cajan (L.) Millsp) Var.CO-7.

The cytological studies provide more information regarding the response of a genotype to the particular mutagen and also provide chances to select desirable characters. The seeds of pigeon pea were subjected to different doses and concentrations of gamma rays and ethyl methane sulphonate (EMS). The effects of different mutagenic treatments on mitosis chromosomal behavior have been studied in both the mutagens. Different types of mitotic aberrations like stickiness, precocious movement, bridge, clumping of chromosome and laggards, etc., were observed in all the treatments. However, the gamma rays treatments proved to be more effective in inducing mitotic aberrations as compared to EMS. The frequency of laggard was high when compared to other mitotic aberrations. The reduction in mitotic index and relative deviation rate frequency were observed with increase in doses and conc. of both the mutagenic treatments and gamma rays were found to be more effective than EMS treatments

Induced mutagenic effectiveness and efficiency studies on Pigeon pea (Cajanus cajan (L.) Millsp).

The present investigation was carried out to study mutagenic effectiveness and efficiency of gamma rays and EMS treatments in Pigeon pea (Cajanus  cajan (L.) Millsp) Var CO-7. The relative effectiveness and efficiency of the both mutagen used was assessed from the data on biological damage in M1 generation and frequency of chlorophyll and viable mutants in M2 generation. The spectrum of chlorophyll mutants such as xantha, albino, chlorina and viridis, viable mutants like tall, dwarf, early flower, early maturity, late maturity, bushy, high yield and seed mutants were observed in both the mutagenic treatments.  Among the chlorophyll mutants xantha was found more in number. The mutagenic effectiveness and efficiency were found to be higher at 20KR of gamma irradiation and 25mM of EMS. The mutation rate of gamma rays was higher in terms of effectiveness than that of EMS. More number of chlorophyll and viable mutants was induced in gamma rays treatment when compared EMS treatment

Gamma Radiation influence on Growth, Biochemical and Yield Characters of Cajanus cajan (L.) Millsp.

The present investigation deals with the effect of gamma radiation on growth, Biochemical and yield traits of Pigeon pea. The seeds of Pigeon pea Var.CO-7 were treated with different doses of gamma rays like 15, 20 and 25KR. The treated seeds were sown in field along with control to raise M1 generation and the radiation effects was noted from seed germination percentage, seedling survival (%), seedling height on 30th days, Days to first flower, plant height, (at maturity), number of branches, number  of leaves, number of cluster, pollen viability (%), number of pods, seed yield, hundred seed weight (g), fresh and dry weight (g), Seed viability (%) and seed protein content (%). The results indicates that the growth, biochemical and yield parameters were gradually decreased when compare to control and the highest reduction was noted at higher doses of gamma radiation treatments. The pollen and seed viability (%) analysis were also reveled that gradually reduction in lower to higher doses of gamma rays treatments

Superhydrophobic fluorine-modified cerium-doped mesoporous carbon as an efficient catalytic platform for photo-degradation of organic pollutants

Accumulation of hazardous waste from effluents of textile, medical, plastic and other industries in the water bodies present a serious threat to human health and environment. A major class of pollutants released from textile industrial wastewater, organic dyes lead to aesthetic pollution of environment, yet their decomposition is a non-trivial and energy-consuming task, while their degradation products may be carcinogenic. Here, we report on the a relatively simple synthesis of a super-hydrophobic platform for efficient, energy-undemanding visible light photocatalytic degradation of organic dyes. Fluorine-modified cerium-doped titania-loaded mesoporous carbon was synthesized using hydrothermal method on mesoporous silica as a low-cost template, and titaniun tetraisopropoxide and cerium nitrate as precursors. Scanning electron microscopy and X-ray diffraction analyses showed the presence of anatase phase of titania and the amorphous graphitic structure of the synthesized mesoporous carbon. From the Brunauer–Emmett–Teller analysis, surface area of the mesoporous carbon was calculated to be 1410 m2/g and from Barrett-Joyner-Halenda analysis, specific pore diameter was calculated as 0.7763 cm3/g. The ultraviolet diffuse reflectance spectroscopy showed that carbon and Ce species were responsible for the visible light response, and Tauc plot showed that the bandgap energy of titania decreased gradually from 2.5 to 1.93 eV due to Ce doping. The ultraviolet-visible spectroscopy, as well as direct experiments in dye degradation have demonstrated that the cerium-doped titania-loaded and fluorine-modified cerium-doped titania-loaded mesoporous carbons have good photocatalytic dye degradation activity in visible light, with the efficiency reaching impressive 96.7%