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Ghosh, M. K.
- Observations on the Pollination in Nechamandra alternifolia (Roxb.) Thw.
Abstract Views :218 |
PDF Views:119
Authors
Affiliations
1 Botanical Survey of India, Calcutta, IN
1 Botanical Survey of India, Calcutta, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 6, No 2-4 (1964), Pagination: 185-187Abstract
While studying the ecology of low lying lands in and around Calcutta, some observations were made on the mechanism of pollination in Nechamandra alternifolia, a common aquatic herb of Hydrocharitaceae. The mode of pollination in this plant indicates that the phenomenon is little influenced by the surface depression formed by tepals of the pistillate flowers. It takes place by the direct contact of the anthers of the floating male flowers on a calm surface of water with die stigmatic lobes of the female flower.Full Text
- Marsilea minuta Linn. Var. Indica Gupta-A New Record for West Bengal
Abstract Views :212 |
PDF Views:102
Authors
Affiliations
1 Botanical Survey of India, Calcutta, IN
1 Botanical Survey of India, Calcutta, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 8, No 3-4 (1966), Pagination: 344-345Abstract
No Abstract.Full Text
- Chemical Nature of Hooghly (Ganga) River Water and an Assessment of their Impact on the Eco-Pedon System of Indian Botanic Garden, Howrah
Abstract Views :176 |
PDF Views:115
Authors
J. N. Singh
1,
M. K. Ghosh
1
Affiliations
1 Botanical Survey of India, Howrah, IN
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 26, No 1-2 (1984), Pagination: 46-51Abstract
The eco-pedon system of the protected premises of the Indian Botanic Garden, located along the river Hooghly in the lower gangetic plain in the district of Howrah, has been studied with a conservational point of view to understand the indiscernible phenomenon of the impact of the river water on the garden eco-pedo-chemical characteristics often submerged due to occasional tidal inundations of the river during the monsoons.It is experimentally revealed that a chemically dilute river water siphons off the mineral riches of the submerged soil system during flash floods. The intensity of mineral erosion is noted to be directly proportional to the periodic length of submergence of the soil system notwithstanding its natural revamping capacity.
Full Text
- Bio-Aquatic Nature of Indian Botanic Garden Lakes
Abstract Views :183 |
PDF Views:119
Authors
J. N. Singh
1,
M. K. Ghosh
1
Affiliations
1 Botanical Survey of India, Howrah, IN
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 30, No 1-4 (1988), Pagination: 161-167Abstract
Nine large lakes out of twenty five occurring in the Indian Botanic Garden, Howrah, have been studied for bio-aquatic nature. The Characteristics of stational parameters are discussed. It is held that the disposition so the lakes vis-a-vis temporal changes and the human interferences are responsible factors affecting Proper conservation of these water bodies.Full Text
- Mineral Potentialities of Leaf Litter of a few Tree Species of Indian Botanic Garden, Howrah
Abstract Views :127 |
PDF Views:131
Authors
J. N. Singh
1,
M. K. Ghosh
1
Affiliations
1 Botanical Survey of India, Howrah, IN
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 27, No 1-4 (1985), Pagination: 232-234Abstract
No Abstract.Full Text
- Parametric Study on Transverse Vibration of Thin Rectangular Plate with Bonded Elastic Patch
Abstract Views :189 |
PDF Views:2
Authors
Amit Tyagi
1,
M. K. Ghosh
1
Affiliations
1 Department of Mechanical Engineering, Institute of Technology, Banaras Hindu University, Varanasi-221005, IN
1 Department of Mechanical Engineering, Institute of Technology, Banaras Hindu University, Varanasi-221005, IN
Source
International Journal of Vehicle Structures and Systems, Vol 2, No 3-4 (2010), Pagination: 87-95Abstract
In this work, transverse vibration of a thin rectangular plate with bonded high density and high modulus patch has been undertaken with simply supported boundary conditions at its edges. Plate material properties, patch thickness and patch area influence the transverse vibration of the host plate. Therefore, these effects must be accounted to correctly determine the natural frequencies of the plate in transverse vibration. The equation of motion for transverse vibration of the plate has been derived by taking into account of the patch material elasticity in the moment and force equations. The displacement function of the transverse vibration has been represented by a double Fourier series to solve the equation of motion for a composite plate with bonded elastic patch. Influence of dimensionless material and geometry parameters on the natural frequencies of the composite plate have been investigated. For material parameters, the flexural rigidity ratio and density ratio of the patch and the host plate have been considered. For geometrical parameters, area ratio and thickness ratio of the patch and the host plate have been considered. The location of the bonded elastic patch has been offset to study the influence of geometry on the modal frequencies. It has been found that these parameters significantly influence the modal frequencies. The results have shown that the shift in the fundamental mode frequency for the case of a central patch is larger than that of the offset patch. For a given area of the patch, the modal frequencies first increase and then decrease for an increase in the patch thickness.Keywords
Transverse Vibration, Bonded Elastic Patch, Modal Frequency, Thin Plates.
- Modal Analysis of Transverse Vibrations of a Thin Rectangular Plate with a Bonded Piezoelectric Patch
Abstract Views :192 |
PDF Views:2
Authors
Amit Tyagi
1,
M. K. Ghosh
1
Affiliations
1 Department of Mechanical Engineering, Institute of Technology, Banaras Hindu University, Varanasi- 221005, IN
1 Department of Mechanical Engineering, Institute of Technology, Banaras Hindu University, Varanasi- 221005, IN
Source
International Journal of Vehicle Structures and Systems, Vol 3, No 4 (2011), Pagination: 234-240Abstract
Present problem deals with a rectangular plate with a PZT patch bonded to it. The plate is considered to be simply supported at its edges. Since PZT possess electromechanical properties, electrical properties along with mechanical properties are considered while deriving the equations of motion for transverse vibration of the plate with patch. The primary focus in this paper is how these electrical properties affect the plate behaviour in terms of transverse vibration frequencies. Transverse displacement has been represented by a double Fourier series. Open circuit boundary condition has been applied to the PZT patch. Results have been obtained for a plate covered fully by the patch and also for a plate covered partially by the patch. It has been found in the present investigation that electrical properties affect modal frequencies significantly.Keywords
Modal Analysis, Transverse Vibrations, Thin Plates, Piezoelectric, Electromechanical.- Some Observation on the Status and Conservation of Swamp Deer Cervus D. duvauceli (Cuvier, 1823) in Dudhwa National Park, India
Abstract Views :210 |
PDF Views:116
Authors
Affiliations
1 Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, IN
2 Gujarat Institute of Desert Ecology, Bhuj, Kachchh-370001, Gujarat, IN
1 Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, IN
2 Gujarat Institute of Desert Ecology, Bhuj, Kachchh-370001, Gujarat, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 113, No 4 (2013), Pagination: 93-101Abstract
Barasingha is one of the large size deer belonging to the family Cervidae wit h characteristic highly branched antler and residing in a marshy habitat, so called swamp deer (Jerdon, 1874; Blanford, 1888-91; Lydekker, 1898, Bhadian, 1934; Pocock, 1943; Schaller, 1967; Krishnan, 1972; Prater, 1971). Brander (1923) mentioned two races of barasingha north-eastern and central Indian races according to their living in two different type of habitat.Keywords
Barasingha, Age-Sex Ratio, Population, Conservation, Dudhwa National Park.Full Text
- Taxonomic Status of the Indian Species and Subspecies of the Genus Cynopterus F. Cuvier
Abstract Views :232 |
PDF Views:123
Authors
Affiliations
1 Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, IN
1 Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 112, No 2 (2012), Pagination: 75-78Abstract
The two species of the genus Cynopterus Cuvier viz. Cynopterus sphinx and Cynopterus brachyotis are known to occur in Indian Territory, and are widely distributed in different parts of the country. Cynopterus sphinx has one subspecies, the nominate one. The subspecies of brachyotis occurring in India are angulatus, brachysoma, ceylonensis and scherzeri, Ellerman & Morrison Scott (1966), however. Hill and Thonglongya (1972) found angulatus more similar to sphinx and regarded it as a subspecies of sphinx on the basis of its external and cranial measurements being closer to sphinx.Full Text
- Bombyx mori Nucleopolyhedrovirus (BmBPV):Its Impact on Silkworm Rearing and Management Strategies
Abstract Views :468 |
PDF Views:179
Authors
Mudasir Gani
1,
S. Chouhan
1,
Babu Lal
1,
R. K. Gupta
2,
Gulab Khan
1,
N. Bharath Kumar
1,
Pawan Saini
1,
M. K. Ghosh
1
Affiliations
1 Silkworm Pathology Laboratory, Central Sericultural Research & Training Institute, Central Silk Board, Ministry of Textiles, Government of India, Pampore - 192121, Jammu & Kashmir, IN
2 Biocontrol Laboratory, Division of Entomology, Sher-e-Kashmir University of Agricultural Sciences and Technology- Jammu, Chatha - 180009, Jammu & Kashmir, IN
1 Silkworm Pathology Laboratory, Central Sericultural Research & Training Institute, Central Silk Board, Ministry of Textiles, Government of India, Pampore - 192121, Jammu & Kashmir, IN
2 Biocontrol Laboratory, Division of Entomology, Sher-e-Kashmir University of Agricultural Sciences and Technology- Jammu, Chatha - 180009, Jammu & Kashmir, IN
Source
Journal of Biological Control, Vol 31, No 4 (2017), Pagination: 189-193Abstract
The mulberry silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae) is infected with a baculovirus, Bombyx mori nucleopolyhedrovirus (BmNPV) that causes grasserie disease in silkworm and major economic losses to the silk industry. In India, >50 % of silk cocoon crop losses are attributed to BmNPV infection. Presently, there are no specific preventive measures for the occurrence and spread of BmNPV infection other than sanitized rearing methods, the only commercial practice today is to discard large stocks of worms in case of infection. Although diagnostic kits for detection of BmNPV have been developed, they are not extensively used on a commercial scale and subsequently, they fail to provide the indispensable and timely advantages desired for early disease intervention. The best emerging technology is the use of antibody–based biosensors and lateral flow assays, which have high specificity, sensitivity and the option of “on– site” pathogen detection. The use of disease resistant silkworm breeds or the utilization of inherent resistance in silkworm would be the most economical and effective way to prevent the occurrence of grasserie disease. Further, there is a great need to comprehensively analyze the host genes response to BmNPV infection and its functional analysis to prevent virus replication and its horizontal transmission.Keywords
Antibody, Biosensor, Bombyx mori, Lateral Flow Assay, Management, Nucleopolyhedrovirus.Full Text
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