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Articles by B.K. Pandey
Total Records ( 4 ) for B.K. Pandey
  A. Pandey , M. Kamle , L.P. Yadava , M. Muthukumar , P. Kumar , V. Gupta , M. Ashfaque and B.K. Pandey
  In the context of the GM food regulations crop improvement via transgenic technology is a new stage of introducing novel food which supercedes over the conventional breeding. It was analyzed that worlds hunger, malnutrition problems, environmental pollution and phytoremediation in agriculture are the challenges for scientist as well as governments those can be combated by application of genetic engineering in crops. Genetically modified microbes/plant/animals or GM microbes/plant/animals results from modification in the genetic make-up of microorganisms, plants and animals using recombinant DNA technology to improve the nutritional requirement, disease resistant traits, increased production and medicinal properties. In many instances, these modification processes represent faster, more efficient mechanisms for achieving changes than traditional breeding. However, a wide variety of modifications are possible through genetic manipulation and the potential for the introduction of toxic compounds, unexpected secondary effects and changes in nutritional and toxicological characteristics may give rise to safety concerns about GM crops. Thus, generation of GM food explores new vistas for future food requirement but the assessment of policy regarding environmental risks is also to be concerned.
  A. Pandey , M. Kamle , L.P. Yadava , M. Muthukumar , P. Kumar , V. Gupta , M. Ashfaque and B.K. Pandey
  A. Pandey , B.K. Pandey , M. Muthukumar , L.P. Yadava and U.K. Chauhan
  Anthracnose, caused by Colletotrichum gloeosporioides, is a serious postharvest disease of mango. The histopathological studies on anatomy of naturally infected by Colletotrichum gloeosporioides and artificially inoculated leaves and healthy leaves were performed to understand the infection process of anthracnose at various intervals after inoculation. Germination and penetration processes of the pathogen within the whole leaf were observed. The first evidence of penetration into the whole leaf was observed 48 h after invasion. It also revealed that mycelia were prominent after 120 h after invasion by the fungus (C. gloeosporioides). Subcuticular infection by hyphae was present in transverse leaf sections (T.S.) of the diseased sample after 72 h. Also, both inter and intra-cellular hyphal invasion were observed after 72 h. Mesophyll cells were highly affected by fungal invasion and rapidly collapsed. Swelling of epidermal cell walls was also observed. After 96 h almost all the cells became necrotized (Nc). Necrotized mycelial mats (M) of C. gloeosporioides was observed after 120 h and all the invaded cells became necrotized (Nc) forming a spot which eventually the cells ruptured leaving a shot hole symptom. All these observations pertained to the cells of mesophyll tissue indicating that these are the regions of fungal invasion and host tissue damage resulting in the disease symptoms. Naturally infected and artificially inoculated (in vitro) presented no significant differences suggesting that the pathogen invasion and symptom development process is similar in both the conditions.
  A.K. Pandey , H.K. Rai , B.K. Pandey , Abhay P. Srivastava and C.K. Singh
  To predict the most suitable EOS for the analysis of real compression behavior of carbon nanotube bundles, single carbon nanotubes and Graphite we have used Suzuki, Shanker, Tait and Murnaghan Equation of states. The analysis of computed results suggests that the Suzuki formulation is not capable of explaining the compression behavior of nanomaterials at higher pressure. Shanker formulation gives slightly better results of volume compression at different pressure than the Suzuki formulation but the results obtained by Tait’s and Murnaghan EOS are in good agreement to the experimental data for nanotube bundle and individual carbon nanotubes in the entire range of pressure. Surprisingly it is observed that only Murnaghan formulation gives the better agreement with the experimental results for graphite than Tait’s formulation. Thus it is concluded that, the well known and widely used Murnaghan EOS is still most suitable and valid for the bulk as well as nanomaterials. The present study also reveals the fact that individual carbon nanotubes are less compressible than bundles of carbon nanotubes.
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