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Dwivedi S.P.,Gb Pant University Of Agri And Technology
ACM International Conference Proceeding Series | Year: 2015

Exponentiation is computing ge, where g is an element of a group G and e is a positive integer. In modular exponentiation the underlying group is ℤn or ℤ∗ n. This paper describe the methods to compute exponentiation where a fixed-exponent e is raised to several bases g of a group G. We describe modular exponentiation based on Bernstein's algorithm for multiplication by constant. We also present a modified approach to modular exponentiation based on k-ary String Replacement (SR(k)) representation. Source

Pathak K.,University of the Humanities | Hatwal D.,University of the Humanities | Gaur A.K.,Gb Pant University Of Agri And Technology
Indian Journal of Horticulture | Year: 2011

Small vegetative parts of Aconitum balfourii from different growth stages were excised for in vitro establishment. The callus induction was achieved from cultured leaf segment on MS medium fortified with NAA (2.5 mg/1) and BAP (1 mg/1). Calli upon transfer onto MS medium containing BA alone (0.5-4 mg/l) for shoot regeneration, multiplication and elongation. Up to 25 shoots per culture flask were obtained on 2 mg/l BAP after 7-8 weeks of culture. The optimum rooting on micro-shoots was observed on MS supplemented with IAA (1.8 mg/l). The in vitro developed plantlets with elongated roots were then subjected for further ex vitro rooting, acclimatization and hardening. Source

Tiwari A.K.,Gb Pant University Of Agri And Technology
Indian Journal of Horticulture | Year: 2013

To understand the impact of various tree barks (pine bark, oak bark and Rhododendron) as a component of potting mixture on flowering size plants of five species of Cymbidium (C. longifolium, C. hookerianum, C. elegans, C. mastersii and C. gigantium), a five year trial was conducted. Results showed significant improvement in number of shoots/ pot, height of plants at the time of flowering, plant fresh weight and dry weight, leaf number & length at six month and at flower emergence in all cymbidium species on pine bark potting mixture. Plant grown in pine bark containing potting mixture produced maximum number of spikes/plant and spikes/clump. Source

Rawat R.,Gb Pant University Of Agri And Technology | Kumbhar B.K.,Post University | Tewari L.,Gb Pant University Of Agri And Technology
Industrial Crops and Products | Year: 2013

In the present investigation, statistical experimental design was used to optimize pretreatment parameters such as alkali concentration, solid to liquid ratio, temperature, and time period of treatment to achieve the highest saccharification yield using poplar biomass. A maximum saccharification rate of 41.5% was obtained after optimization of the pretreatment condition. The optimal alkali treatment conditions for poplar wood were found to be 2.8% NaOH with ratio of 1:8 at 94 °C for 60. min. The results of a confirmation experiment under the optimum conditions agreed well with model predictions. The physicochemical changes in substrate after alkali treatment were evaluated by Fourier transmission infrared spectroscopic analysis and scanning electron microscopy. Fourier transmission infrared spectroscopic results showed that alkali treatment removed large fractions of lignin. Scanning electron micrograph revealed the pores and cracks developed during pretreatment. © 2012 Elsevier B.V. Source

Srivastava R.M.,Gb Pant University Of Agri And Technology | Phartiyal T.,Gb Pant University Of Agri And Technology
Journal of Entomological Research | Year: 2012

Studies revealed that population of brown soft scale Coccus hesperidium was positively correlated with temperature and moisture. Maximum infestation was observed in the month of May whereas minimum was in December. Cymbidium hookerionum, C. longifolium and C. mastonon species harbored negligible scale insect population and performed well in the agroclimatic condition of Uttarakhand whereas C. eburneum species showed poor performance due to severe scale infestation. Source

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