Effect of 2-(alpha-hydroxybenzyl) benzimidazole (HBB) 5-iodo-2'-deoxyuridine (IUD) and actinomycin D on replication of strains of bovine enterovirus     

N Nath  S Balaya  L N Mohapatra 《The Indian veterinary journal》1971,48(1):1-5

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Transformation Strategy for Managing Coupled Socio-Ecological Systems: Case Studies from Bangladesh and the Philippines     

Abrar Juhar Mohammed  Makoto Inoue  Rose Jane Peras  Tapan Kumar Nath  Mohammed Jashimuddin  Juan M. Pulhin 《Small-Scale Forestry》2016,15(2):213-227

This study demonstrates the potential of transformation strategy (an approach that emphasizes strengthening interdependence among social and ecological systems) to rehabilitate degraded land by examining two cases in Bangladesh and one in the Philippines. The study considers the benefits obtained from forests and forest-related activities in the form of income and energy sources as key parameters to link the social system (local people) with the ecological system (forest). Qualitative and quantitative analysis of data on land use and socio-economic changes indicates that the transformation strategy improved both the wellbeing of local people and forest cover. In the case of the Philippines, social and ecological linkages were found to be strong, with local people rehabilitating the degraded land while also obtaining a high proportion of their total income from the activity. For the two Bangladesh cases, however, the level of dependency on the forest for livelihood declined as local people used their income from the forest and forest-related activities for diversification to non-forest activities.  相似文献   

Ethnobotany of medicinal plants from Dibru-Saikhowa Biosphere Reserve of Northeast India     

Purkayastha J  Nath SC  Islam M 《Fitoterapia》2005,76(1):121-127

A survey of medicinal plants used by the ethnic communities of Dibru-Saikhowa Biosphere Reserve in Northeast India has been reported. Fifty-five plant species belonging to 34 families and 52 different genera were included. For each plant species, botanical name, vernacular name, part(s) used, popular medicinal use, forms of preparation and applications of the herbal remedies are provided.  相似文献   

<Emphasis Type="Italic">Mangifera sylvatica</Emphasis> Roxb. in the Forests of South-Eastern Bangladesh: A Potential Underutilised Tree for Small-Scale Forestry     

Tarit Kumar Baul  M. Jahedul Alam  Tapan Kumar Nath 《Small-Scale Forestry》2016,15(2):149-158

Mangifera sylvatica Roxb. is an underutilized wild tree species valued for its fruit, timber and medicine. It was believed to be widely grown in sub-tropical forests of Bangladesh, but nowadays can be seen only sparsely. Even though it has multiple uses, only the indigenous people in hilly areas use the fruit of this species, for cooking and making pickles. This study was designed to (1) observe the population status of M. sylvatica in the forests of south-eastern Bangladesh, (2) evaluate domestication potentiality through seed germination and early growth of seedlings, and (3) assess its suitability for small-scale forestry. Through 16 field visits in eight forest beats, 66 individual trees were identified and their GPS (global positioning system) coordinates were recorded. A seed germination rate of 83 % at 6 weeks after direct sowing was attained. The early growth of seedlings with fertilizer treatments showed no remarkable difference with seedlings without fertilization. The seed germination rate and early growth of seedlings indicates that this species can be easily domesticated and be incorporated into small-scale plantation programs. In that it has multiple use values, this species warrants promotion in small-scale forestry programs for conservation and benefiting the villagers.  相似文献   

Modeling spatiotemporal distribution of Dipterocarpus turbinatus Gaertn. F in Bangladesh under climate change scenarios     

Kamrul Islam  Md. Farhadur Rahman  Kazi Nazrul Islam  Tapan Kumar Nath  Mohammed Jashimuddin 《Journal of Sustainable Forestry》2020,39(3):221-241

ABSTRACT

Climate change affects plant phenology, spatial distribution, and even extinction of vulnerable species. Dipterocarpus turbinatus, locally known as garjan, is a valuable but vulnerable native tree species of Bangladesh whose spatial distribution under future climate change scenarios is not fully understood. The aim of this study was to examine the effects of present and future climatic scenarios on spatiotemporal distribution of D. turbinatus. We used maximum entropy species distribution modeling to perform the present and future habitat suitability of garjan under different climate scenarios. The representative concentration pathways (RCP) 2.6 and 8.5 were considered for bioclimatic variables from the Global Climate Model – Hadley Global Environment Model 2 Atmosphere-Ocean. The predictive accuracy of the model was more than 97% in both the training and test data. The prediction results suggest that compared to present areas (7624 km²) under moderate habitat class it will be 2755 km² and 1239 km², respectively, in 2050 and 2070 under RCP2.6 scenario and decreases more rapidly under RCP8.5 scenario. Besides, the prediction also indicates that the habitat of the species will shift toward the high altitudinal south-eastern corner of the country whereas local extinction might occur in the north-eastern part during 2070.  相似文献   

Mutagenic response of rhodes grass (Chloris gayana Kunth.) to gamma rays. II. Studies on second (M2) generation parameters     

G. Krishna  G. Shivashankar  J. Nath 《Euphytica》1984,33(2):517-524

Summary The effect of gamma rays on parameters such as chlorophyll mutation frequency and spectrum, mutagenic effectiveness and efficiency and viable mutation frequency and spectrum were studied in M₂ generation of Rhodes grass employing nine doses of gamma rays. The chlorophyll mutation frequency increased in a linear fashion at low and medium doses and was erratic at higher doses. The chlorophyll mutant spectrum ineluded albina, xantha, chlorina, viridis, tigrina, striata, albo-xantha and albo-viridis. The frequency of these mutants varied with treatments. A dose rate of 60 krad was found to be effective as well as efficient both on M₁ and M₂ plant basis in inducing chlorophyll mutations. The highest frequency of viable mutations was found in 50 krad treatment. Viable mutants found were: nodal variant, peduncle variant, lax ears, coxcomb ears, earhead proliferation, level of fingers, incurved fingers, gappy ears, apical sterility, partial sterility and high sterility.  相似文献   

Nickel induced hyperglycemia in the freshwater fish,Colisa fasciatus     

H. S. Chaudhry  Kedar Nath 《Water, air, and soil pollution》1985,24(2):173-176

Effect of nickel sulphate at the sublethal dose of 64 ppm (0.8 of LC50 96 hr) on the blood glucose levels of the freshwater fish, Colisa fasciatus, has been estimated from 3 to 96 hr. The blood glucose level exhibits a steady increase due to Ni toxicity. A maximum increase of 85.08% is observed at 96 hr (P < 0.001). It is suggested that the hyperglycemia in C. fasciatus, caused by exposure to nickel sulphate, is possibly a reflection of stress-induced hormone mediated response. It appears that the blood glucose level is a reliable indicator of Ni toxicity to fish.  相似文献   

Characterisation of peach (Prunus persica L.) cultivars using isozymes as molecular markers     

Sandhya Agarwal  Amarjit K. Nath  D. R. Sharma 《Scientia Horticulturae》2001,90(3-4):227-242

Six enzyme systems were surveyed in 12 peach cultivars using polyacrylamide gel electrophoresis of leaf extracts. Variation between cultivars was observed in four enzymes: peroxidase, isocitrate dehydrogenase, acid phosphatase and alkaline phosphatase. Genetic variation parameters revealed that the maximum proportion of polymorphic loci was 46.1%. Out of 15 loci studied, 9 were monomorphic and 6 were polymorphic for 20 alleles. A dendrogram showed the grouping of cultivars on the basis of genetic distance values. The use of isozyme electrophoresis to find the inter-relationship of cultivars is discussed.  相似文献   

Cytogenetical and related studies in the genus Phleum L.     

J. Nath 《Euphytica》1967,16(2):267-282

Phleum pratense L., the only species of Phleum that is of economic importance, is found in all temperate regions of the world.Cytogenetic evidence, in some cases, indicates the autopolyploid nature of P. pratense.Several anomalous cytological behaviors such as heavy walled coenocytes, neocentric chromosomes, uncoiled chromosomes, "cross-bridges" at second division, "globular" bodies, and B-chromosomes have been reported in timothy. Some of these behaviors appear to be related to sterility.Genetic work involving a study of chlorophyll deficiencies suggests hexasomic and tetradisomic modes of inheritance.Relationships among height, vigor, and fertility following cross- and self-pollination are discussed.Published with the approval of the Director of the West Virginia Agricultural Experiment Station as Scientific Paper No. 931.Associate Professor of Genetics, Agronomy and Genetics Department, West Virginia University, Morgantown, West Virginia, U.S.A.  相似文献   

Haemagglutination by bovine enteroviruses     

N Nath  S Balaya  L N Mohapatra 《The Indian veterinary journal》1970,47(12):1038-1043

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