Refine your search
Collections
Co-Authors
Journals
- Indian Forester
- Journal of Environment and Sociobiology
- Reason-A Technical Journal (Formerly Reason-A Technical Magazine)
- The Indian Journal of Nutrition and Dietetics
- Current Science
- Records of the Zoological Survey of India - A Journal of Indian Zoology
- Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Chakrabarti, S.
- Raising of Mulberry (Morus L.) under the Shade of Eucalyptus Trees and its Allelopathic Effect on the Growth and Survival
Abstract Views :255 |
PDF Views:0
Authors
Source
Indian Forester, Vol 133, No 4 (2007), Pagination: 577-580Abstract
No abstract
- Mortality of Dalbergia sisso Roxb. (Shisham) in Subathu Forest Range of Solan, Himachal Pradesh: a Case Study
Abstract Views :254 |
PDF Views:0
Authors
Source
Indian Forester, Vol 130, No 3 (2004), Pagination: 349-350Abstract
No abstract- Large-scale Mortality of Willow in Lahaul Valley, District Lahaul & Spiti, Himachal Pradesh
Abstract Views :260 |
PDF Views:0
Authors
Source
Indian Forester, Vol 129, No 4 (2003), Pagination: 543-545Abstract
No abstract- Abundance , Activity and Diversity of Insects Associated with Flower of Sal (Shorea robusta) in Midnapore , (Arabari) West Bengal , India
Abstract Views :247 |
PDF Views:1
Authors
Source
Indian Forester, Vol 124, No 1 (1998), Pagination: 62-74Abstract
The sweet fragrance of Sal flower attracts the varied groups of insects. In the present study , the insects visiting the Sal flowers during blooming period (i.e. March) were studied for two consecutive years. (1985-86) during morning , noon and afternoon periods in the dry deciduous natural Sal forests ofArabari , Midnapore , West Bengal , India. As many as 84 different types of species representing 44 families under 7 orders viz. , Coleoptera , Diptera , Hemiptera , Homoptera , Hymenoptera , Lepidoptera and Thysanoptera were collected. Insects were identified. Their abundance , varieties and activities were studied. Availability of the insect per hour were recorded. Percentage of different groups were calcuated and diversity indices (D' values) of the species were analyzed. In the general the '0' values were highest in the morning followed by afternoon and noon. From the study it clearly appears that Sal flowers are entomophilious in nature and most active pollinators are some dipteran flies an4 bees. However , almost all the insects appear on flower heads , play some role in this pollen transfer process. And different pollinators exert varied selective forces as a result of their effectiveness in pollen transport system.- Locating Zones of High Discharging Wells for Protection and Management of Groundwater Resources in Precambrian Metamorphic Rocks of Purulia District, West Bengal, India - A Case Study by Hydrostructural Domain Approach
Abstract Views :304 |
PDF Views:1
Authors
Affiliations
1 Department of Geology, Hooghly Mohsin College, University of Burdwan, Chinsurah-712101, IN
2 Department of Applied Geology & Environmental Systems Management, Presidency University, 86/1 College Street, Kolkata 700 073, IN
1 Department of Geology, Hooghly Mohsin College, University of Burdwan, Chinsurah-712101, IN
2 Department of Applied Geology & Environmental Systems Management, Presidency University, 86/1 College Street, Kolkata 700 073, IN
Source
Journal of Environment and Sociobiology, Vol 11, No 1 (2014), Pagination: 11-24Abstract
Locating sites of high discharging wells in metamorphic crystalline terrain is still a difficult problem imposing inadequate protection and management for groundwater resources. The present study attempts to determine this technique in a Precambrian metamorphic rock in and around Balarampur, Purulia district, West Bengal, India using lineaments, joints/fractures and well data with the help of software approach. The joints/fracture study consists of using hydraulically significant fracture data to generate representative modal and coefficient of variance (Cv) for each domain. Lineament study incorporates estimation of the hydraulically significant FCL and their percentage of occurrence in each domain. The hydrostructural domain based study identifies areas within the shear zone (D2) and south of the shear zone (D3) as hydraulically significant region than the region to north of the shear zone (D1). The modal and Cv values of well discharges also signify D2 and D3 as hydraulically significant part of the study area. Existing wells show discrete increase in discharge from Dl. to D3 through D2, with high discharging wells (= 4000 litre per day) occurring in groups in linear fashion, defining 'well lines', in close proximity to the determined FCL. Thus the study validated the hydrostructural domain based analysis for locating high discharging wells, indicating the sites for protection and management of groundwater resources for sustainable utilization and development in Precambrian metamorphic terrain.Keywords
Fracture, Lineament, Well Location, Precambrian Metamorphic Rock.- A Numerical Study on the Pressure Variation in a Sudden Expansion and a Sudden Expansion with Central Restriction
Abstract Views :489 |
PDF Views:157
Authors
T. Das
1,
S. Chakrabarti
2
Affiliations
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani, Nadia -741235, West Bengal, IN
2 Department of Mechanical Engineering, Bengal Engineering and Science University, Shibpur, Howrah-711103, West Bengal, IN
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani, Nadia -741235, West Bengal, IN
2 Department of Mechanical Engineering, Bengal Engineering and Science University, Shibpur, Howrah-711103, West Bengal, IN
Source
Reason-A Technical Journal (Formerly Reason-A Technical Magazine), Vol 10 (2011), Pagination: 21-26Abstract
In this paper, a numerical study on the performance of sudden expansion with central restriction, viewed as a diffuser, has been carried out. The two dimensional steady differential equations for conservation of mass and momentum are solved for Reynolds number(Re) from 10 to 100 and CR from 0% to 30% for an aspect ratio (AR) of 2 and fully developed velocity profile at inlet. From the study, it is revealed that for sudden expansion, maximum wall pressure decreases with the increase in Re. Sudden expansion with central restriction also behaves in same way. Location of the maximum wall pressure increases with increase in Re for both sudden expansion and sudden expansion with central restriction. The value of maximum average static pressure increases with increase in Re for both sudden expansion and sudden expansion with central restriction. Location of the maximum average static pressure from the throat, which may be considered as the effective length of the diffuser, increases with Re for both the cases. In case of sudden expansion with central restriction, maximum average static pressure increases with the increase in CR but its location from throat remains more or less same, at a particular value of Re. In comparison to a simple sudden expansion, the magnitude of maximum average static pressure is more and the location of maximum average static pressure from the throat is less for sudden expansion with central restriction.
Therefore, choice of the configuration of sudden expansion with central restriction, as a diffuser, is more attractive in comparison to the configuration of a simple sudden expansion.
Keywords
Central Restriction, Wall Pressure, Static Pressure.Full Text
- Variation of Group Diversity in Soil Microarthropod Community at Different Altitudes in the Darjeeling Himalayas, West Bengal, India
Abstract Views :211 |
PDF Views:0
Authors
Affiliations
1 Zoological Survey of India, New Alipore, Kolkata-700 053, IN
2 Department of Zoology, Kalyani University, Kalyani-741235, IN
1 Zoological Survey of India, New Alipore, Kolkata-700 053, IN
2 Department of Zoology, Kalyani University, Kalyani-741235, IN
Source
Journal of Environment and Sociobiology, Vol 4, No 2 (2007), Pagination: 163-168Abstract
Soil samples were collected from eight sites with an approximate altitudinal gap of 500 m in the Darjeeling Himalaya in West Bengal. Microarthropods collected from soil were divided into four major groups, viz., oribatid mites, other mites, collembola and other microarthropods. Monthly and yearly group diversity of four groups of soil microarthropods were calculated using Shannon's diversity index. Monthly group diversity was found to be negatively correlated with the abundance in most places. Correlation was also traced between some edaphic factors and group diversity. Temperature, moisture and pH were found to have some prominent impact on group diversity in some sites. Organic carbon showed no significant correlation probably because of its presence in sufficient quantity in soil. Both monthly and yearly group diversity were highest in the Tiger Hill.Keywords
Soil Microarthropod, Group Diversity, Edaphic Factors, Altitudes.- Leaf Protein Concentrates (LPC) from Some Water Weeds and their Lipid Contents
Abstract Views :168 |
PDF Views:1
Authors
Affiliations
1 Leaf Protein Unit, Biological Sciences Division, Indian Statistical Institute, 203 Barrackpore Trunk Road, Calcutta-700035, IN
1 Leaf Protein Unit, Biological Sciences Division, Indian Statistical Institute, 203 Barrackpore Trunk Road, Calcutta-700035, IN
Source
The Indian Journal of Nutrition and Dietetics, Vol 19, No 4 (1982), Pagination: 125-127Abstract
For successful commercial production of leaf protein concentrate (LPC), selection of species is an important criterion. Ideally, species are to be selected from non-conventional plants and the plants which are usually unused or underused.- Indigenous Development of 320 x 256 Focal-Plane Array Using InAs/InGaAs/GaAs Quantum Dots-In-A-Well Infrared Detectors for Thermal Imaging
Abstract Views :242 |
PDF Views:88
Authors
Affiliations
1 Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, IN
2 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN
1 Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, IN
2 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN
Source
Current Science, Vol 112, No 07 (2017), Pagination: 1568-1573Abstract
We report here the indigenous development of a 320 x 256 infrared focal-plane imager fabricated using an InAs quantum dots-in-a-well heterostructure, whose photoluminescence peak is at 1162 nm and activation energy is 187 meV. We discuss the fabrication and characterization of single-pixel detectors that can measure intersubband spectral responses with peak intensity at 9.3 μm. Using the fabricated device, infrared images were captured at 50-90 K. Device optimization led to approximately 95% of the pixels in the imaging array being operational and a reasonably low noise equivalent temperature of approximately 100 mK at 50-60 K.Keywords
Focal-Plane Arrays, Infrared Detectors, Photoluminescence Peak, Quantum Dots, Thermal Imaging.Full Text
References
- Ryzhii, V., The theory of quantum-dot infrared phototransistors. Semicond. Sci. Technol., 1996, 11, 759–765.
- Gunapala, S. D. et al., 640 512 pixels long-wavelength infrared (LWIR) quantum-dot infrared photodetector (QDIP) imaging focal plane array. IEEE J. Quant. Elecron., 2007, 43, 230–237.
- Tsao, S., Lim, H., Zhang, W. and Razeghi, M., High operating temperature 320 x 256 middle-wavelength infrared focal plane array imaging based on an InAs/InGaAs/InAlAs/InP quantum dot infrared photodetector. Appl. Phys. Lett., 2007, 90, 201109(1–3).
- Jiang, J. et al., Demonstration of a 256 x 256 middle-wavelength infrared focal plane array based on InGaAs/InGaP quantum dot infrared photodetectors. Appl. Phys. Lett., 2004, 84, 2232–2234.
- Williams, J. O., Metal organic chemical vapour deposition (MOCVD) for the preparation of semiconductor materials and devices. In Growth and Characterisation of Semiconductors (eds. Stradling, R. A. and Klipstein, P. C.), Adam Hilger, New York, 1990, pp. 17–33.
- Lundstrom, M., III–V heterojunction bipolar transistors. In Heterojunction Transistors and Small Size Effects in Devices (ed. Willander, M.) Studentlitteratur, Sweden, 1992, pp. 35–46.
- Foxon, C. T. and Joyce, B. A., Growth of thin films and heterostructures of III–V compounds by molecular beam epitaxy. In Growth and Characterisation of Semiconductors (eds Stradling, R. A. and Klipstein, P. C.), Adam Hilger, New York, 1990, pp. 35–64.
- Stiff, A. D., Krishna, S., Bhattacharya, P. and Kennerly, S. W., Normal-incidence, high-temperature, mid-infrared, InAs–GaAs vertical quantum-dot infrared photodetector. IEEE J. Quant. Electron., 2001, 37, 1412–1419.
- Andrews, J. R. et al., Comparison of quantum dots-in-a-doublewell and quantum dots-in-a-well focal plane arrays in the longwave infrared. IEEE Trans. Electron Dev., 2011, 58(7), 2022–2027.
- Krishna, S., Quantum dots-in-a-well infrared photodetectors. J. Phys. D, 2005, 38, 2142–2150.
- Broekaert, T. P. E. and Fonstad, C. G., AlAs etch-stop layers for InGaAlAs/InP heterostructure devices and circuits. IEEE Trans. Electron. Dev., 1992, 39(3, 533–536.
- Andrews, J. R. et al., Comparison of quantum dots-in-a-well and quantum-well focal plane arrays in the long-wave infrared. IEEE Trans. Electron. Dev., 2009, 56(3), 512–516.
- Arthropod - Induced Plant Galls with Reference to Aphid Galls and Gall Aphids (Hemiptera, Insecta) in the Himalaya
Abstract Views :272 |
PDF Views:3
Authors
Affiliations
1 Post-Graduate Department of Zoology, Vidyasagar College, Kolkata 700 006, IN
1 Post-Graduate Department of Zoology, Vidyasagar College, Kolkata 700 006, IN
Source
Journal of Environment and Sociobiology, Vol 14, No 1 (2017), Pagination: 1-6Abstract
Plant galls are abnormal growth of plant cells as a result of hypertrophy or hyperplasy due to feeding and/or oviposion of arthropods and other organisms. Due to gall induction a co-existence is established for the survival and growth of both plants and the gall inducing organisms. Among arthropods, some members of the insect orders Diptera, Coleoptera, Hemiptera, Hymenoptera, Lepidoptera, Orthoptera and Thysanaptera and acarine familes Tenupalidae, Eriophyidae and Phytoptidae can induce plant galls. Galls are found on about 15,000 plant species from gymposperms to dicotyledons. Gall inducing individuals establish an intimate relationship with the plant for efficient and successful utilisation of habitat and food resources. Plant hormones, i.e., Indole acetic acid (IAA) alone or in combination with tryptophan are mainly responsible for gall induction but their specific mode of action is not yet properly known. There is no geographical boundary of galls in general. In India, aphid galls are restricted only in the Himalaya and more in Northwest Himalaya.Keywords
Galls, Hypertrophy, Hyperplasy, Phytophagous Arthropods.References
- Abrahamson, W. G. and Weis, A. E. 1987. Nutritional ecology of arthropod gall makers. In F. Slansky and J. G. Rodriguez (eds.) Nutritional ecology of gall insects. John Wiley & Sons, New York, USA, pp. 236-258.
- Aoki, S. and Kurosu, U. 2010. A review of the biology of Ceratiphidini (Hemiptera, Aphididae, Hormaphidinae) focusing mainly on their life cycles, gall formation and soldiers. Psyche, 2010: 1-34 (on line).
- Ananthakrishnan, T. N. 1978. Thrips galls and gall thrips. Technical Monograph, No 1, Zoological Survey of India, Kolkata, pp. 1-69.
- Askew, R. R. 1984. The biology of gall wasp, pp. 223-272. In T. N. Ananthakrishnan (ed.) Biology of gall insects. Oxford & IBH Publ. Company, New Delhi, India.
- Blanche, K. R. 1993. Insect induced galls on Australian vegetation, pp. 49-55. In P. W. Price et al. (eds.) The Ecology and evolution of gall forming insects. USDA Forest Service. St. Paul, Minnesota, USA.
- Chakrabarti, S. 2007. Diversity and biosystematics of gall-inducing aphids (Hemiptera: Aphididae) and their galls in the Himalaya. Oriental Insects, 41: 35-54.
- Chakrabarti, S. 2009. Diversity, distribution and endemism of aphids (Hemiptera) in Indian subregion of Oriental realm. Redia, 42: 79-85.
- Felt, E. P. 1940. Plant galls and gall makers. Comstock Publishing, New York, USA, pp 1-364.
- Fernandes, G. W., Lara, A. C. F. and Price, P. W. 1993. The geography of galling insects and the mechanisms that results in patterns, pp. 42-48. In P.W. Price et al. (eds.) The Ecology and evolution of gall forming insects. USDA Forest service, St. Paul, Minnesota, USA.
- Gagne, R. J. 1984. The geography of gall insects, pp. 305-322. In T. N. Ananthakrishnan (ed.) Biology of gall insects. Oxford & IBH Publ. Company, New Delhi, India.
- Hartley, S. E. 1999. Are gall insects large rhizobia? Oikos, 84: 333-342.
- http://aphid.speciesfile.org- Aphid Species File (Accessed on May 15, 2016)
- Mani, M. S. 2000. Plant galls of India. (2nd ed.). Science Publishers Inc. New Hampshire, USA, pp 1-477.
- Meyer, J. 1987. Plant galls and gall inducer. Gebruder Borntraeger, Berlin, Germany, pp 1-291.
- Miles, P. W. 1999. Aphid saliva. The Biological Review, 74: 41-85.
- Raman, A., Schaefer, C. W. and Withers, T. M. 2005. Biology, ecology and evolution of gall inducing arthropods – Vol. I. Science Publishers, Inc. Enfield (NH), USA, pp. 1-429.
- Remaudiere, G. and Remaudiere, M. 1997. Catalogue of the World’s Aphididae. INRA, Paris, France, 1-493.
- Schaller, G. 1968. Untersuchungen zur Erzeugung kunstlicher Pflanzengallen. Marcellia, 35: 131-153.
- Schlinger, E. I. 1974. Continental drift, Nothofagus and some ecologically associated insects. Annual Review of Entomology, 19: 323-343.
- Skuhravy, M., Skuhravy, V. and Brewer, J. W. 1984. Biology of gall midges, pp. 169-222. In T. N. Ananthakrishnan (ed.). Biology of gall insects. Oxford & IBH Publ. Company, New Delhi, India.
- Weiss 1993. What can gallmakers tell us about natural selection on the components of plant defense? pp. 157-172. In P. W. Price et al. (eds.) The Ecology and evolution of gall forming insects. USDA Forest service, St. Paul, Minnesota, USA.
- A New Subspecies of the Genus Galumna Heyden 1826 (Acarina: Oribatida: Galumnidae) from Maharashtra, India
Abstract Views :245 |
PDF Views:123
Authors
Affiliations
1 Department of Zoology, Narasinha Dutt College, 129, Belilious Lane, Howrah-711101, IN
2 Zoological Survey of India, New Alipore, Kolkata-700053, IN
3 Department of Zoology, Kalyani University, Kalyani-741235, IN
1 Department of Zoology, Narasinha Dutt College, 129, Belilious Lane, Howrah-711101, IN
2 Zoological Survey of India, New Alipore, Kolkata-700053, IN
3 Department of Zoology, Kalyani University, Kalyani-741235, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 113, No 1 (2013), Pagination: 35-37Abstract
von Heyden (1826) established the genus Galumna with Notaspis alata Hermann, 1804 from Germanyas the type underthe family Galumnidae Jacot, 1925. The super family Galumnoidea Jacot, 1925 is one of the superfamilies under suborder Cryptostigmata of the order Acarina. These mites are commonly known as galumnid mites. The“characteristically-shaped” galumnid mites possess two wing-like “pteromorphae” at both sidesofnotogastergivingthema conspicuous look. Most of these mites are highly pigmented and heavily sclerotized.Full Text
- Two New Species and Ten New Records of the Genus Pergalumna (Aacarina: Oribatida: Galumnidae) from India
Abstract Views :227 |
PDF Views:108
Authors
Affiliations
1 Department of Zoology, Narasinha Dutt College, 129, Belilious Lane, Howrah-711101, IN
2 Zoological Survey of India, New Alipore, Kolkata-700053, IN
3 Department of Zoology, Kalyani University, Kalyani-741235, IN
1 Department of Zoology, Narasinha Dutt College, 129, Belilious Lane, Howrah-711101, IN
2 Zoological Survey of India, New Alipore, Kolkata-700053, IN
3 Department of Zoology, Kalyani University, Kalyani-741235, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 112, No 4 (2012), Pagination: 1-6Abstract
The genus Pergalumna was established by Grandjean (1936) with Oribates nervosa Berlese, 1914 from Italy as the type xinder the family Galumnidae Jacot, 1925 and the superf amily Galumnoidea Jacot, 1925. Woodring (1962) referred the family as the most advanced pterogasterine group of mites. These mites are commonly known as galumnid mites.Full Text