Antibody response of cattle to Leptospira pomona: response as measured by hemagglutination, microscopic agglutination, and hamster protection tests   总被引：1，自引：0，他引：1  

S K Negi  W L Myers  D Segre 《American journal of veterinary research》1971,32(12):1915-1920

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Spot agglutination test for the rapid diagnosis of goat pox     

A. K. Tiwari  T. V. S. Rao  B. S. Negi 《Tropical animal health and production》1996,28(3):213-215

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Cross-taxon surrogacy of biodiversity in the Indian Garhwal Himalaya     

Hans Raj Negi  Madhav Gadgil 《Biological conservation》2002,105(2):143-155

Biodiversity surveys were conducted in 13, 10×50 m² plots located between 1400 to 3700 m above mean sea level in a range of habitats in temperate mixed Oak and Coniferous forests through sub-alpine to the alpine grasslands in Chamoli district of Uttaranchal state in the Indian Garhwal Himalaya. Cross-taxon congruence in biodiversity (α-diversity and β-diversity) across macrolichens, mosses, liverworts, woody plants (shrubs and trees) and ants was investigated, so as to examine the extent to which these groups of organisms can function as surrogates for each other. Although woody plants provided a major substrate for macrolichens and mosses, there was no species-specific association between them. Woody plant species richness was highly positively correlated with mosses (r²=0.63, P<0.001), but the relationship was not particularly very strong with lichens and liverworts. While there was a significant correlation in the species turnover (β-diversity) of macrolichens with mosses (r²=0.21, P<0.005), the relationship was relatively poor with the woody plants. On the other hand, negative correlations emerged in the species richness of ants with those of macrolichens, mosses and woody plants (r²=−0.44, P<0.05), but most of the complementarity (turnover) relationships among them were positive. Since diversity between taxonomic hierarchies within the group was consistently significantly positively correlated in all these taxa, the higher taxonomic categories such as genus and family may be employed as surrogates for rapid assessment and monitoring of species diversity. Although no single group other than macrolichens has emerged as a good indicator of changes in species richness in all other groups, some concordant relationships between them conform to the hypothesis that species assemblages of certain taxonomic groups could still be used as surrogates for efficient monitoring of species diversity in other groups whose distribution may further predict the importance of conserving overall biodiversity in landscapes such as the Garhwal Himalaya.  相似文献   

Retention of quality characteristics of dehydrated green leaves during storage     

Negi  P.S.  Roy  S.K. 《Plant foods for human nutrition (Dordrecht, Netherlands)》2001,56(3):285-295

Green leafy vegetables are the most underexploited class of vegetablesdespite high nutritional value. Reports on nutritional composition andstorage of some of the fresh leaves are available but the storage behaviorof dehydrated leaves apparently has not been studied. Therefore, in thepresent study, two green leafy vegetables, savoy beets (Beta vulgarisvar. bengalensis) and fenugreek (Trigonella foenumgraecum) were dehydrated in a low temperature drier and stored for9 months under ambient and cold stored conditions after packaging insingle or double layers of high density polyethylene film (200 gauge). Thequality was determined on the basis of retention of -carotene,ascorbic acid and chlorophyll, and the extent of browning during storage.Retention of these quality characteristics depended on the crop and storageconditions. Double packed and cold stored samples of fenugreek retained67% -carotene, whereas savoy beet leaves retained only 57% ofthe initial -carotene under similar conditions. Similarly, higherretention of ascorbic acid and chlorophyll, and lower browning wasobserved in double packed, cold stored samples. Results indicated theefficacy of double packed and cold stored samples over other combinations.  相似文献   

Multiple genes confer anthracnose resistance in French bean (Phaseolus vulgaris L.) accessions of Garhwal Himalayas     

Prabha  Deepti  Chamoli  Navneeti  Negi  Yogesh Kumar  Chauhan  J. S. 《Genetic Resources and Crop Evolution》2022,69(2):809-821

Genetic Resources and Crop Evolution - The Indian Himalayan region is very rich in the genetic diversity of French bean and therefore considered as the secondary centre of origin of French bean....  相似文献