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plant diversity at Chilapatta Reserve Forest of Terai Duars in subhumid tropical foothills of Indian Eastern Himalayas

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Journal of Forestry Research 2014年第3期25卷 591-596页

作者： Gopal Shukla Rajib Biswas A. p. das Sumit Chakravarty Department of Forestry Uttar Banga Krishi Viswavidyalaya Pundibari-736165 (Cooch Behar) West Bengal India Department of Botany University of North Bengal

From March 2007 to March 2009 we quantified plant diversity at Chilapatta Reserve Forest in Terai Duars in the Indian eastern Himala-yas. We sampled stratified random nested quadrats. Species richness was 311, representing 167 genera and 81 families. The species diversity index and concentration of dominance of the forest were 2.20 and 0.0072, respectively. Shannon-Wiener index and evenness indices were 4.77 and 1.44, respectively. The Importance Value Index （IVI） of species ranged from 0.13 to 37.94. The estimated diversity indices indicated heterogene-ity of the forest in its composition, structure, function and dynamics. Rich forest plant diversity supports the need for continued conservation of tropical forests.

关键词： Terai Duars phyto-sociology plant diversity diversity indices

A geospatial investigation of interlinkage between basement fault architecture and coastal aquifer hydrogeochemistry

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Geoscience Frontiers 2020年第4期11卷 1431-1440页

作者： p.p.das p.p.Mohapatra S.Goswami M.Mishra J.K.pattanaik ACOAST Amity University HarayanaGurugramIndia Department of Geology North Odisha UniversityOdishaIndia Department of Earth Sciences Sambalpur UniversitySamabalpurOdishaIndia Khallikote University BerhampurOdishaIndia Centre for Geography and Geology Central University of PunjabBhatindaIndia

The Mahanadi delta,deposited on a series of horst and graben basement structures,is considered an extension of the East Lambert Rift of *** study is based on the hydrogeochemical assessment of this deltaic aquifer system and geospatial analysis thereof,to appreciate the basement structure influence on groundwater *** ion chemistry of subsurface waters portrays a distinct saline contamination across the terrain and varied regimes of water types,specifically with respect to southern and northern parts of this aquifer *** of the study indicate a general near surface saline horizon and significant fragmentation of the hydrostatic ***,in turn,implies noteworthy influence of formational water to salinity regimes and basin structural changes for the escape of these waters to surroundings.A plot of recent low intensity earthquakes displays proximity of epicenters to the faults as well as striking similarity to the trend of terrestrial faults indicating multiple reactivations of the *** further corroborate the above findings,spatial pattern analysis of individual hydrochemical variables is carried out which reveals specific clusters of sources(groundwater mixing)and sinks(groundwater dispersion) in proximity to basement fault *** the faults can be disregarded as conduits or barriers owing to their great depth,the overlying sedimentary mass,particularly,the horizons with significant clayey content have been distorted due to post rift subsidence and fault reactivations.A proximity analysis of ionic clusters points towards a greater influence of longitudinal faults to that of the transverse ones on groundwater mixing or dispersion.

关键词： Hydrogeochemistry Mahanadi Geospatial Salinity Cluster analysis

Distribution and generic composition of culturable marine actinomycetes from the sediments of Indian continental slope of Bay of Bengal

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Chinese Journal of Oceanology and Limnology 2008年第2期26卷 166-177页

作者： Surajit das p. S. LYLA S. AJMAL KHAN Centre of Advanced Study in Marine Biology Annamalai University Parangipettai-608 502 Tamil Nadu India

Actinomycetes population from continental slope sediment of the Bay of Bengal was studied. Samples were collected during two voyages of FORV Sagar Sampada in 2004 （May-June） and 2005 （July） respectively from 11 transects （each transect had ca. 200 m, 500 m, and 1 000 m depth stations）. The physicochemical parameters of overlying water, and sediment samples were also recorded. The actinomycete population ranged from 5.17 to 51.94 CFU/g dry sediment weight and 9.38 to 45.22 CFU/g dry sediment weight during the two cruises respectively. No actinomycete colony was isolated from stations in 1 000 m depth. Two-way analysis of variance showed significant variation among stations （ANOVA two-way, p〈0.05）, but no significance was found between the two cruises （ANOVA two-way, p〈0.05）. populations in stations in 500 m depth in both cruises were higher than that of 200 m depth stations with statistically insignificant difference （ANOVA two-way, p〉0.05）. Three actinomycetes genera were identified. Streptomyces was found to be the dominating one in both the cruises, followed by Micromonospora, and Actinomyces. The spore of Streptomyces isolates showed the abundance in spiral spore chain. Spore surface was smooth. Multiple regression analysis revealed that the influencing physico-chemical factors were sediment pH, sediment temperature, TOC, porosity, salinity, and pressure. The media used in the present study was prepared with seawater. Thus, they may represent an autochthonous marine flora and deny the theory of land runoff carriage into the sea for adaptation to the salinity of the seawater and sediments.

关键词： marine actinomycetes generic composition physico-chemical parameters continental slope Bay of Bengal

Antioxidants in Food and Chronic Degenerative Diseases

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Biomedical and Environmental Sciences 1996年第2期9卷 117-123页

作者： J．K．CANDLISH N．p．das BiochemistryDepartment NationalUniversityofSingaporeKentRidgeCrescentSingapore0511 BiochemistryDepa

Both preventive and chain breaking antioxidants have a role in the limitation of free radical damage. Some of these may be regarded as 'classical', like vitamins E and C but others are more recently discovered, such as the flavonoids, widespread in plant tissues, and the muscle constituents anserine and carnosine. The major conditions in which the role of antioxidants is under intense investigation include coronary artery disease, cancer and diabetes. There are theoretical underpinnings for the efficacy of antioxidants in each of these, with the protection of low density lipoprotein (in respect of the first) being exceptionally *** attention is now being focussed on the flavonoids, which are surprisingly pleiotropic in their effects. For one of them, quercetin, over a dozen seemingly independent biologica1 effects can be listed, including the inhibition of low density lipoprotein *** also inhibit peroxidation in foodstuffs, as opposed to *** is much controversy over antioxidant supplementation policies, some authorities recommending a massive programme of supplementation for all ages and classes, others stressing the value of the traditional mixed diet. This matter is unlikely to be resolved soon,but in the meantime sensible supplementation policies should be continued for those most vulnerable, that is, babies and the aged

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Composition and Genesis of Zeolitic Claystones from the Central Indian Ocean Basin

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Acta Geologica Sinica(English Edition) 2007年第5期81卷 756-770页

作者： Sridhar D.Iyer M.Sudhakar p.das National Institute of Oceanography Dona Paula Goa 403004India National Centre for Antarctic:and Ocean Research Sada HeadlandVasco-da-Gama Goa403804India

We examined more than fifty indurated sediments recovered from the Central Indian Ocean Basin （CIOB） during the course of collection for manganese nodules and crusts. The samples occur as slabs either over which ferromanganese oxides are present or over a substrate of altered oceanic basalt in conjunction with palagonite or within the nucleus of manganese nodules. Mineralogically and compositionally, the samples show a mixture of phillipsite, palagonite and montmorillonite. We suggest that the volcanogenic precursors occurring in the CIOB were subjected to varying degrees of alteration under the influence of low temperature conditions, resulting in the formation of zeolitic claystones. The CIOB samples have similarities to those reported from various sites in the world oceans.

关键词： halmyrolysis zeolites alteration authigenesis Indian Ocean

proximate composition and antimicrobial activity of three wild edible mushrooms consumed by ethnic inhabitants of Tripura in northeast India

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Studies in Fungi 2017年第1期2卷 17-25页

作者： Roy das A Saha AK das p Mycology and plant pathology Laboratory Department of BotanyTripura UniversitySuryamaninagar-799022TripuraIndia Microbiology Laboratory Department of BotanyTripura UniversitySuryamaninagar-799022TripuraIndia

The study was focused on edible mushrooms consumed by the ethnic inhabitants of Tripura,northeast *** mushrooms namely Lentinus squarrosulus,Lentinus tuber-regium and Macrocybe gigantea were evaluated quantitatively for proximate composition and mineral *** addition,the efficacy of the mycelial extract was tested for antimicrobial activity against the *** results of this study indicated that mushrooms were rich in protein and carbohydrate with low fat *** gigantea proved to the best source of protein and carbohydrate among the three *** were varied amount of micronutrients recorded in all the three *** antimicrobial activity of mycelial extract of *** was found against all the tested strains of *** study suggested that these mushrooms are rich in nutrients particularly *** which could be used as an alternative source of vegetarian food to the ethnic people of *** antimicrobial activity exhibited by these mushrooms indicated their medicinal properties.

关键词： Antimicrobial activity edible mushroom ethnic tribes macro nutrients micro nutrients

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注意:概念、测验和教师等级评定

华东师范大学学报（教育科学版） 2002年第3期20卷 68-76,96页

作者： J.p.das 加拿大阿尔伯特大学

本文的理论部分探讨注意的性质、注意的测验和测量,以及注意缺陷的鉴定。注意具有选择性,它包含着对冲动反应的抑制和对分心的克服。第二部分讨论三项经验研究,这些研究探索了注意等级评定量表的使用,该量表由教师对儿童在课堂情境下的... 详细信息

本文的理论部分探讨注意的性质、注意的测验和测量,以及注意缺陷的鉴定。注意具有选择性,它包含着对冲动反应的抑制和对分心的克服。第二部分讨论三项经验研究,这些研究探索了注意等级评定量表的使用,该量表由教师对儿童在课堂情境下的注意情况进行等级评定。研究发现,教师的等级评定可以预测课外情境中儿童在注意测验上的表现。这些等级评定具有显著的预测性,正如该测验的结果所表明的,教师一直关注着儿童注意的一个重要方面,即对分心的抵制。在结论性评述中,讨论了可能导向注意缺陷改善的动态测试。第三部分是附录部分,例举了若干注意力测验。

关键词：概念测验注意教师等级评定动态评估认知

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pASS理论语境中的认知过程(英文)

心理科学 2010年第6期33卷 1285-1290页

作者： J.p.das 邓赐平(中文摘要翻译) Jp das Developmental Disabilities Center University of Alberta Edmonton Canada 不详

计划-注意-同时性加工-继时性加工,这些基本pASS概念的提出,是为了给传统上将智力作为一个笼统构念的做法提供某种替代的选择。在这一新的理论途径中,我将一般能力分解为对主要认知过程的研究,其中每个认知过程均有其行为、认知和神经... 详细信息

计划-注意-同时性加工-继时性加工,这些基本pASS概念的提出,是为了给传统上将智力作为一个笼统构念的做法提供某种替代的选择。在这一新的理论途径中,我将一般能力分解为对主要认知过程的研究,其中每个认知过程均有其行为、认知和神经心理成分,而且重要的是,每个认知过程均有相应的一组评估测量任务。pASS模型,这一理论框架能够充分包容体现于教育和组织行为中的广泛一系列认知功能。

关键词：智力的pASS理论 D-N:认知评估系统脑成像研究认知干预

OSCILLATORY AND ASYMpTOTIC BEHMIOUR OF A CLASS OF NONLINEAR DIFFERENTIALEQUATIONS OF THIRD ORDER

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Acta Mathematica Scientia 1998年第1期18卷 95-106页

作者： N. parhi p. das(Department of Mathematics, Berhampur University, Bechampur-760007, India)

This paper deals with oscillatory /nonoscillatory behaviour of solutions of thirdorder nonlinear differential equations of the formwhere a,b,c E C([a,oo),R) such that a(t) does not change sign, b(t) 5 0, c(t) > 0,f∈C(R, R) such that (f(y)/y) ≥ β > 0 for y ≠ 0 and γ > 0 is a quotient of odd *** has been shown, under certain conditions on coefficient functions, that a solution of (1)and (2) which Las a zero is oscillatory and the nonoscillatory solutions of these equationstend to zero as t → ∞. The motivation for this work came from the observation that thewhere al b, c are constants such that b≤ 0, c > 0, has an oscillatory solution if and only ifand all nonoscillatory solutions of (3) tend to zero if and only if the equation has anoscillatory solution.

关键词： Oscillatory solution nonoscillatory solution behaviour of solution nonlinear differential equation