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Mandy Haggith Ravi Prabhu Carol J. Pierce Colfer Bill Ritchie Alan Thomson Happyson Mudavanhu 《Small-Scale Forestry》2003,2(2):225-239
Will the practice of collecting wild honey wearing no clothes become a widespread practice in Zimbabwe? Or will beekeeping take over as the main way that people acquire honey? Both practices impact on forest resources; how can the foresters influence the uptake of these ideas? This paper describes an exploratory modelling study investigating how social network patterns affect the way ideas spread around communities. It concludes that increasing the density of social networks increases the spread of successful ideas whilst speeding the loss of ideas with no competitive advantage. Some different kinds of competitive advantage are explored in the context of forest management and rural extension. 相似文献
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Deen Dayal Giri Prabhu Nath Shukla Priti Singh Kapil Deo Pandey 《Soil biology & biochemistry》2007,39(9):2424-2426
Soil samples were collected from Panchamarhi dry deciduous forest in Satpuda Biosphere Reserve, India to determine the effect of hill slopes and altitude on the population size of methanotrophic bacteria. Population size, in range of 4×105-3.6×107 g−1 dry soil, was negatively correlated with altitude and increased exponentially (r2=0.97, P<0.001) at steep slope (60°) while logarithmically (r2=0.97, P<0.001) at low slope (45°). Soil organic C, total N, and soil moisture increased while C/N ratio and temperature decreased down the hill slope. The results indicated that nutritional status of the soil across the slopes determines the methanotrophic bacterial population size. 相似文献
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Patel Mohanakumara Nambiar Sreejayan Vaidayanathan Priti Bheemanahally Thimmappa Ramesha Gudasalamani Ravikanth Kotiganahalli Narayanagowda Ganeshaiah Ramesh Vasudeva John Mohan Thankayyan Retnabai Santhoshkumar Prabhu Dutt Mishra Viswakarma Ram Ramanan Uma Shaanker 《Fitoterapia》2010
Rohitukine, a chromane alkaloid, is a precursor of flavopiridol, a promising anti-cancer compound. Currently in Phase III clinical trials, flavopiridol is a potent inhibitor of several cyclin-dependent kinases (CDKs). Rohitukine was first reported from Amoora rohituka (0.083% dry weight) followed by that in Dysoxylum binectariferum (0.9% dry weight), both belonging to the family Meliaceae. Here, we report incredibly high yields of rohitukine (7% dry weight) in trees of D. binectariferum from the Western Ghats, India. Crude extracts of the tree were found to be highly effective against ovarian and breast cancer lines tested. 相似文献
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D. P. Cherukuri S. K. Gupta A. Charpe S. Koul K. V. Prabhu R. B. Singh Q. M. R. Haq S. V. S. Chauhan W.E. Weber 《Plant Breeding》2003,122(3):204-208
The leaf rust resistance gene Lr19, transferred from Agropyron elongatum into wheat (Triticum aestivum L.) imparts resistance to all pathotypes of leaf rust (Puccinia recondita f.sp. tritici) in South‐east Asia. A segregating F2 population from a cross between the leaf rust resistant parent ‘HW 2046’ carrying Lr19 and a susceptible parent ‘Agra Local’ was screened in the phytotron against a virulent pathotype 77‐5 of leaf rust with the objective of identifying the molecular markers linked to Lr19. The gene was first tagged with a randomly amplified polymorphic DNA (RAPD) marker S73728. The RAPD marker linked to the gene Lr19 which mapped at 6.4 ± 0.035 cM distance, was converted to a sequence characterized amplified region (SCAR) marker. The SCAR marker (SCS73719) was specific to Lr19 and was not amplified in the near‐isogenic lines (NILs) carrying other equally effective alien genes Lr9, Lr28 and Lr32 enabling breeders to pyramid Lr19 with these genes. 相似文献