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S. Ghosh

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M. K. Chowdhuary , S. Ghosh

Abstract

Jaldapara Sanctuary which comprises an area of 115 km² has been identified as one of the last refuges Of the Great Indian Rhinoceros (Rhinoceros unicornis). The habitat is topical riverain subject to periodic flooding and an abundance of grasslands on the flood plains. However, during the recent past there has been some shift in the river course as a result of which tbe north-west part of the sanctuary is progressively being covered with tree growth to the detriment of the grasslands. The sanctuary is in the shape of a trousers with a large number of villages situated in between the two legs aod along the external boundaries. The rhinos in the sanctuary are under the greatest pressure from the poachers and over the past few years their number has alarmingly dwindled. The last rhino census carried out in 1980 estimated a population of 22. More often than not a rhino may not die on spot on being shot as the shots may be taken in haste, and may die a lingering and painful death from festering wounds. Cases where the shot has failed to pierce a vital organ but has nevertheless produced large wounds are quite common, Treatment of such wounds by surgery and medication may, in some cases save the life of the animal. In this paper an account has been given of how a wounded rhino was immobilized by tranquillising dart and then surgically operated upon on the 16th of May, 1982.

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A. Shirwaikar , S. Ghosh , G.M. Padma

Abstract

Objective: To study the effect of the alcoholic extract of the dried leaves powder of Gmelina arborea on wound healing. Materials and method: The alcoholic extract was studied at dose level of 200 mg/kg body weight using incision, excision and dead space wound models in rats. Results: Significant increase in wound contraction rate, skin breaking strength, granuloma breaking strength, hydroxyproline content and dry granuloma weight and decrease in epithelization period was observed. The prohealing actions seem to be due to increased collagen deposition as well as better alignment and maturation. Conclusion: From the results it may be concluded that the plant Gmelina arborea is endowed with significant wound healing activity, thereby justifying its use in the traditional medicine.

Keywords

Gmelina arborea, Incision Wound Model, Excision Wound Model, Dead Space Wound Model

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S. Pal ¹, S. Chatterjee ¹, K. S. Chakrabarty ¹, S. Chatterjee ², C. Chatterjee ³, S. Ghosh ⁴

Affiliations
1 Neurosurgery, Medical college, Kolkata, IN
2 Kasturba Medical College, Mangalore, IN
3 Dept. of Microbiology, Burdwan Medical College, IN
4 Dept. of Neurosurgery, I.P.G.M.E.R, S.S.K.M & BIN, Kolkata, IN

Abstract

The incidence of paediatric head injury is growing larger day by day due to various reasons in this era of mechanisation. We tried to evaluate the various aspects of head injury in children like incidence, severity, its clinical and radiological correlation, fatality and outcome etc. in our Institute IPGME&R, Kolkata. One third of total head injured patients were in paediatric age group in our study and it was evident that early evaluation of the injured child with CT scan and referral to neurosurgical centre can save many lives.

Keywords

Head Injury, Children, Neurosurgery

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S. Pal ¹, S. Chattopadhyay ¹, K. S. Chakrabarty ¹, D. Basu ¹, S. Ghosh ², S. Chatterjee ³

Affiliations
1 Medical College, WB University of Health Sciences, Kolkata, IN
2 Bangur Institute of Neuroscience, WB University of Health Sciences, Kolkata, IN
3 Kasturba Medical College, Mangalore, IN

Abstract

The most common incomplete cervical spinal injury is central cord syndrome. As defined by Schneider et al in 1954, there is disproportionately greater motor deficit in the upper limbs than in the lower limbs. In this prospective study, 26 in-patients with cervical spine injury with greater motor loss in the upper limbs following the injury were selected. Based on clinical status and radiological findings, 19 were operated upon. Results at 6 weeks and 6 month follow up are discussed. Overall, the results of surgery in these cases were rewarding.

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P. K. Banerjee ¹, S. Ghosh ²

Affiliations
1 School of Oceanography, Jadavpur University, Calcutta-700 032, IN
2 Geological Survey of India, Calcutta-700 016, IN

Abstract

The Simlipal basic volcanics share two common features with the Newer Dolerite dyke swarm (within the Singhbhum-Keonjhar granite) and the Ongarbira volcanics and Dangoaposi lavas occurring along its western margin: their freedom from intense folding movements and from granite intrusion; although Simlipal's tectonic and chronologic frame with grits and sandstones alternating with basic volcanics still awaits solution. The geologic and isotope geochronologic data available from these suites do not rule out the possibility that these could be broadly contemporaneous eruptions and emplacements. Judging by the uniform spread of the dykes over approx. 20,000 sq·km of granite country, the forcing of all these eruptions by a plume head, spreading below the Singhbhum continental lithosphere near the transition between Proterozoic I and II is suggested as a tectonomagmatic model, to be tested in future against high resolution isotope geochronological dates and dependable REE and Nd-Sr geochemistry for defining the eruptive events of this terrain.

Keywords

Tectonics, Simlipal, Ongarbira, Dangoaposi lavas, Newer Dolerite, Proterozoic, Orissa, Bihar.

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K. K. Dwivedi ¹, S. Ghosh ¹, S. Singh ¹, D. Sinha ¹, A. Srivastava ¹, S. N. Bhat ¹

Affiliations
1 Department of Chemistry, North-Eastern Hill University, Shillong-793 003, IN

Abstract

A new application of nuclear track microfilters has been demonstrated by determining the critical micelle concentration (CMC) of cationic, anionic and nonionic surfactants. The lowering of CMC due to the addition of methyl red dye in Trition X-100 surfactant (in molar ratio of 1:100) has also been studied. The critical micelle concentrations of cetyl pyridinium chloride (CPC), sodium dodecyl sulphate (SDS) and polyoxyethylene (9.5) octylphenol (Triton X-100) surfactants are determined using polycarbonate nuclear track microfilters and these are found to be comparable with the literature values. The experimental method is described here and the results are discussed.

Keywords

Nuclear Track Microfilters, Surfactants, Critical Miscelle Concentration (CMC), Makrofol-N.

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A. R. Das ¹, M. E. Haque ¹, A. Das Burman ¹, S. Ghosh ², S. N. Basu ³

Affiliations
1 Polymer Science Unit, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700 032, IN
2 Department of Chemistry, St. Paul's C. M. College, Calcutta 700 009, IN
3 Department of Chemistry, Ashutosh College, Calcutta 700 026, IN

Abstract

The micellar properties of sodium glycodeoxycholate (NaGDC) and polyoxyethylene tert-octylphenyl ether (Triton X-100) and their binary combinations have been investigated using tensiometry and fluoresence techniques. The critical micelle concentrations of the micellar species were determined from surface tension and spectrofluorimetric methods. The CMC's of mixed micelles are found to be lower than the ideal values according to Clint's equation. The microenvironment of the micelles were explored from the viewpoint of aggregation characteristics and polarity index. The mean aggregation numbers were obtained from steady state quenching experiments. The values decreased with increasing mole-fraction of the bile salt in the co-micelle. The ratio of the first and third vibronic peaks (I₁/I₃) in a monomeric pyrene emission spectrum provided an estimate of the polarity index of the micelle interior. The results indicate that the pyrene solubilization site changes with the concentration of the micellar species and the hydrophobic character of the mixed agregates increases with the increase of NaGDC mole-fraction. The CMC's and composition of the mixed systems have been calculated following molecular thermodynamic approach. The calculated mole-fractions of NaGDC are lower than the analytical ones and the evaluated interaction parameter gives a measure of the synergism of the interacting amphiphiles.

Keywords

Sodium Glycodeoxycholate, Triton X-100, CMC, Polarity Index, Aggregation Number, Composition, Interaction Parameter.

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S. Ghosh ¹, J. P. Keshri ¹

Affiliations
1 CAS in Botany, The University of Burdwan, Golapbag, Burdwan 713104, IN

Abstract

Porphyra vietnamensis Tanaka & P.H. Ho was collected from the east coast (various parts of Visakhapatnam) of India during a low tide status. Detailed morphology of the taxon was studied. The present specimens are smaller than the type material originally described but slightly bigger than the material described from Visakhapatnam coast.

Keywords

Porphyra vietnamensis, Morphology, Visakhapatnam Coast, India.

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B. Mishra ¹, N. Pal ¹, S. Ghosh ²

Affiliations
1 Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur - 721 302, IN
2 EASC, 8888 University Drive, Simon Fraser University, Burnabay, B.C., Canada V5A156, CA

Abstract

Fluid inclusions in quartz from the mineralized quartz veins from the Mosabani and Rakha copper deposits were investigated. On the basis of petrography, two distinct types of primary inclusions were identified. These are low saline aqueous biphase inclusions and high saline halite-bearing polyphase inclusions. The halite-bearing inclusions mostly homogenized by halite dissolution; barring instances where homogenization was manifest by disappearance of the vapour bubble. Minimum entrapment pressure values were eslimated by intersection of the halite liquid with the corresponding incIusion isochores. The ranges in P-T at the ternpcratures of halite dissolution are: 2.6 kb / 370°C - 0.8 kb / 263°C for Mosabani and 2.1 kb 1 270°C - 0.65kb / 217°C for Rakha. Temperature-salinity plots fot both the deposits is suggestive of restricted mixing (and simple cooling) of a hot saline magmatic fluid with cooler low saline meteoric water that caused precipitatin of sulphide minerals. Stable isotope data (δ¹⁸O and D) from Changkakoti et al. (1987) are re-interpreted in the present study, leading to the conclusion that the main fluid component for Mosabani mineralization was either of magmatic/metasomatic parentage or an evolved meteoric water at a low water/rock ratio, after its interaction with a granitic pluton. The observed high saline nature of fluids in both the deposits compels us to choose an initial magmatic/metasomatic fluid that evolved by restricted mixing and simple cooling.

Keywords

Fluid inclusions, Microthermornetry, Copper Ores, Mosabani, Rakha, Singhbhum, Jharkhand.

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S. Ghosh ¹

Affiliations
1 Department of Zoology, ABN Seal College, Coochbehar-736101, WB, IN

Abstract

Polycystic ovary syndrome (PCOS) is a common but complex endocrine disorder and is a major cause of anovulation and consequently infertility. It is characterized with hyperandrogenism and metabolic disturbance, such as hyperinsulinemia, insulin resistance and obesity etc. Despite its prevalence little is known about its aetiology.

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S. Ghosh ¹, S. Nandy ¹, A. Senthil Kumar ¹

Affiliations
1 Indian Institute of Remote Sensing (ISRO), Dehradun 248 001, IN

Abstract

Flooding is considered as the most damaging natural hazard. Continuous population growth associated with changes in land use and climate exacerbates flood hazard, and makes livelihood more precarious. A large part of Assam, a state of northeastern India, experiences devastating flood frequently. The Brahmaputra river, along with its distributaries and tributaries in Assam, causes flood in the monsoon season each year which affects agriculture, human life and properties, wildlife, etc.

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S. Ghosh ¹, I. Zaidi ¹, Anand Lakshmy ¹, P. Choudhury ¹, S. K. Bhargava ¹

Affiliations
1 The Department of Pediatrics, Safdarjang Hospital, New Delhi, IN

Abstract

Physical growth and development of children in the developing countries have been the subject of interest among pediatricians as well as nutritionists and psychologists all over the world. Several studies published in India have shown poor growth standard of Indian children compared to western standard.

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B. M. Daas ¹, P. K. Ghosh ², S. Ghosh ²

Affiliations
1 Department of Chemistry, Government Degree College, Dharmanagar – 799253, Tripura, IN
2 Integrated Science Education & Research Centre, Visva-Bharati, Santiniketan – 731235, West Bengal, IN

Abstract

Background/Objective: Metals and alloys react with corrosive media to form a stable compound, which results loss of metal and the metal surface gets corroded. Aluminium has a lot of application and so resisting aluminium corrosion is a vital step. Methodology: The inhibition ability of graphene oxide composite with ZSM-5 and MCM-41 towards aluminium corrosion in 0.01 M NaOH solution was studied using weight-loss measurement, potentiodynamic polarization curves, and SEM-EDS methods. Findings: The data from weight loss measurements, tafel plots, SEM micrographs and amperometric study in alkaline medium compared to blank solution indicated an enhancement of inhibition efficiency of graphene in the form of composite with ZSM-5 and MCM-41. SEM-EDS analyses confirmed less corrosion damage of aluminium owing to the surface adsorption of the composites. Application: This interesting study can be very vital in the field of corrosion and battery science mainly in Al-air cell.

Keywords

Aluminium, Corrosion, Corrosion Inhibition, Graphene Oxide-Zeolite Composite, Zeolites

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Mrinmoy Das ¹, S. Ghosh ¹

Affiliations
1 Tripura Engineering College, IN

Abstract

Frequently many designers face the problem of designing reinforced concrete slab having large square or rectangular holes subjected to transverse loads. Exact mathematical analysis for these problems are not yet known due to difficulty is obtaining a suitable deflection function satisfying the complex boundary conditions around the edges of hole. As such many practising engineers often resort to either some empirical formulae or sometimes try to apply their experience in designing such slabs. The object of this paper is to introduce design, engineers with the idea of solving such complex problems by a much simpler method of finite difference which involves less advanced mathematical technique and therefore is within the scope of practising engineers.

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S. Ghosh ¹, Nishchhal Yadav ¹

Affiliations
1 School of Studies in Physics, Vikram University, Ujjain-456010, IN

Abstract

Based on the hydrodynamic model of-plasmas an analytical investigation of frequency modulational interaction between co-propagating high frequency pump and electrostrictively generated acoustic mode is carried out in a semiconductor medium. The consequent steady-state amplification characteristics of the modulated waves are also reported. Using coupled mode theory, the effect of excess carriers diffusion on the threshold field and gain profile of the modulated wave is extensively studied. The origin of this interaction is assumed to lie in the induced non-linear diffusion current density of the medium. By considering the modulation process as a four-wave parametric interaction, an expression for effective cubic susceptibility describing the phenomenon is deduced. The modulation is greatly modified by propagation characteristics such as dispersion and diffraction due to dielectric relaxation of acoustic mode. The threshold pump field and steady-state growth rates are estimated from the effective cubic polarization in the plasma medium. Analytical estimation reveals that in the presence of enhanced diffusion due to excess charge carriers, the modulated beam can be effectively amplified in a dispersion-less acoustic wave regime. The moderately doped medium and low wavelength region are found to be most suitable for the onset of diffusion-induced modulational interaction in the medium.

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S. Ghosh ¹, B. K. Agarwala ¹

Affiliations
1 Department of Zoology, Tripura University, Suryamaninagar, Tripura 799 022, IN

Abstract

Inter-specific relationships of size and walking speed were examined in five species of predaceous ladybird beetles of aphid prey from different habitats. Lengths of legs, weight and volume of body, and walking speed varied significantly among the five species of different sizes that were reared on their preferred prey food in uniform growth conditions. The species are Menochilus sexmaculata, Coccinella transversalis, Anisolemnia dilatata, Micraspis discolor and Scymnus sp. Lengths of legs and body sizes showed similar growth rates across the five species (isometry), but the giant ladybird species showed significantly higher positive allometry in body volume (allometric coefficient, α = 6.66) and significantly lower negative allometry in walking speed relative to body weight (α = 0.95) when compared to other species (α = 3.54). The unique response by the giant ladybird species in body form and speed may be attributed to its foraging habitat of perennial bamboo forests with large aggregations of non-winged aphid food which seem to favour the evolution of higher body volume and slower speed for giant size when compared to species of smaller sizes which usually forage for short-lived aphid colonies in seasonal and annual habitats of crop plants and weeds. Evidently, size (weight and volume) and speed matter in the evolution of life history attributes of predaceous ladybird beetles.

Keywords

Evolutionary Allometry, Predaceous Ladybirds, Size and Speed.

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S. Ghosh , B. K. Agarwala

Abstract

The following corrections are suggested in citations nos. 11 and 32.

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