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Search Results: 1 - 10 of 462696 matches for " Mandal A "
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Heavy Metals in Soils around the Cement Factory inRockfort, Kingston, Jamaica  [PDF]
A. Mandal, M. Voutchkov
International Journal of Geosciences (IJG) , 2011, DOI: 10.4236/ijg.2011.21005
Abstract: This study deals with the distribution of heavy metals in soils around one of the most important industries in Kingston, Jamaica i.e. the Carib Cement factory at Rockfort. The dust emitted from the Caribbean Cement Company Limited (Carib Cement), located in Rockfort, Kingston, gets deposited in course of time over the soil, leaves and forms a grey cover on the surrounding soils. Geochemical analysis of the top soil, collected from the present study area has been undertaken to assess the impact of the dust emitted from the cement factory and its effect on the surrounding ecosystem. A total of seventeen top soil samples of 0-10 cm depth were collected from the close vicinity of the Rockfort and the Harbour view area and analysed by INAA, AAS, XRF for major, minor and trace elements. Results show that the top soils of the study area are enriched in Pb, Zn, Cr, Cd, V, Pb, and Hg which are released into the air from the cement kilns. Results show that the soils are enriched in Ca with a maximum value of 18% followed by Al, Fe and Na. Heavy metals in the soils of the study area shows relatively high concentrations of zinc with a maximum of 132 ppm followed by Cr (57) ppm and Pb (32) ppm. Maximum concentrations were found in soils sampled at a distance of 2-3 m from the cement factory as opposed to samples collected much further ie from the Harbour View area. High concentrations of the heavy metals in the soils near the cement factory as opposed to those further away can be due to the emissions from the factory. A significant contribution can also come from traffic emissions as the study area is located along one of the busiest street of Kingston, Jamaica.
Management of the late leaking filtration blebs. A report of seven cases and a selective review of the literature.
Mandal A
Indian Journal of Ophthalmology , 2001,
Abstract: PURPOSE: To describe the outcome of various treatment modalities in the management of late bleb leaks after glaucoma filtering surgery (GFS). MATERIALS AND METHODS: Seven consecutive patients treated for late bleb leaks (Seidel′s positive) between July 1990 and June 1999 were were enrolled in the study. The management strategy consisted of initial conservative therapy, and tailored surgery, if necessary. The surgical technique employed was either conjunctival-Tenon′s advancement flap, hinged scleral flap, or fistulectomy with direct suturing. The main outcome measures were bleb characteristics and postoperative intraocular pressure (IOP). The secondary outcome measure was visual acuity. RESULTS: One patient responded to conservative therapy (aqueous suppressants, bandage contact lens) and six patients needed surgery. The successful surgical technique was conjunctivo-Tenon′s advancement flap in three, hinged scleral flap in two, and fistulectomy-direct suturing to the wound (combined with cataract surgery and intraocular lens implantation) in one patient. The bleb leak stopped in all cases and 5 of the 6 surgical patients sustained functioning filtering blebs. Follow-up ranged from 8 to 56 months (mean = 20.4 +/- 16.2 months). Visual acuity improved to 6/12 or better in 4 cases, 6/36 in 2 cases and it remained at light perception in one case. None of the patients had any intraoperative or postoperative complications. CONCLUSIONS: Late leaking blebs after GFS can be treated successfully. The management decision and selection of surgical technique should be based on the clinical condition.
Matching Function: Estimations using JOLTS
A. Mandal
The International Journal of Applied Economics and Finance , 2011,
Abstract: The study estimates a matching function for the US non-farm sector using the Job Opening and Labor Turnover Survey (JOLTS) data. In the recent years, matching function has emerged as the workhorse of modern labor search theory. It enables the modelling of frictions in otherwise conventional economic models, with minimum of added complexity. In theoretical search framework, it is assumed that matching function has constant returns to scale. To verify the returns to scale character of the matching function empirically, monthly JOLTS data has been used from December 2000 to March 2009 to estimate a matching function for the US. The study found that the returns to scale of the matching function vary according to business cycle. The close to constant returns to scale matching function only obtained for the non-recessionary time period. The study concluded that the functional form of the matching function may not be stable over time and one need to take into account business cycle fluctuations and its impact on the functional form of the matching function while understanding labor and worker flows in an economy.
A note on the approximation of the wave integral in a slightly viscous ocean of finite depth due to initial surface disturbances
A. Bandyopadhyay,A. Mandal
Applied Mathematical Sciences , 2013,
Abstract: The difficulty of analyzing the multiple-integral expression for the surface displacement z for small motion in a viscous ocean of finite depth due to an arbitrary initial surface disturbance is well-known. It is shown here that under certain conditions this expression is reducible to a simpler one which is easily amenable to analysis.
THE EFFECT OF RADOME ON RESONANCE CHARACTERISTICS OF TRIANGULAR PATCH ANTENNA
M. BISWAS,A. MANDAL
International Journal of Engineering Science and Technology , 2011,
Abstract: A simple and accurate CAD model based on cavity model analysis is proposed to predict the effect of superstrate or radome on resonant frequencies of an equilateral triangular patch antenna. The computed values for wide range of superstrate parameters and patch sizes are compared with different theoretical and experimental values available in open literature showing close agreement. A Maxwell’s equation solver is used to generate some simulated data.
A study of drug eruptions by provocative tests
Das J,Mandal A
Indian Journal of Dermatology, Venereology and Leprology , 2001,
Abstract: Sixty cases of drug eruptions were observed during the period of one year. The incidence of drug eruption was 0.47% amongst all Dermatology O.P.D. attendances. Male to female ratio was 7:3. The highest number of cases were seen in the age group of 21-30 years. Fixed drug eruptions were the most frequent (58.3%), followed by urticaria and angioedema (20%). The drug sulphonamides (including co-trimoxazole) accounted for the highest number of eruptions (35%). The other drugs which were responsible for the eruptions, in order of frequency, were oxyphenbutazone, ampicillin, analgin, penicillin, tetracycline, ibuprofen, paracetamol, phenylbutazone, acetaminophen and phenobarbitone. The causative drug (s) were confirmed by provocation tests in 42 (70%) cases.
Enhanced Development of Embryogenic Callus in Stevia rebaudiana Bert. by Additive and Amino acids
A. Das,N. Mandal
Biotechnology , 2010,
Abstract: Stevia rebaudiana Bert. is an economically important medicinal plants act as a sugar substitute for diabetic and obese people. In the present investigation a novel protocol was developed to accelerate the production of embryogenic calli so that large number of in vitro plant regeneration can be feasible. Two different types of amino acids (Trypthphan and Glutamine) in different concentration and three different types of additives (yeast extract, casein hydrolysate and Potato extract) were utilized along with MS medium supplemented with 2,4-D (2.0 mg L-1), BAP (0.5 mg L-1), sucrose (30 g L-1) and agar with leaf as explant to elucidate their role in developing and maintaining embryogenic calli. It was found that glutamine (50 mg L-1) and casein hydrolysate (100 mg L-1) produced greenish, healthy nodular calli with more embryogenic potential and less necrotic lesion in comparison with only PGR supplemented basal medium which further performed better in regeneration medium for producing large number of regenerated shoots.
Chaotic Behavior of a Class of Neural Network with Discrete Delays  [PDF]
S. Mandal, D. Jana, A. B. Roy, N. C. Majee
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2013, DOI: 10.4236/ijmnta.2013.21A012
Abstract:

In this paper, the effect of neuronal gain in discrete delayed neural network model is investigated. It is observed that such neural networks become highly chaotic due to the presence of high neuronal gain. On the basis of the largest Lyapunov exponent and largest eigenvalue of Jacobian matrix, chaos analysis has been done. Finally, some numerical simulations are presented to justify our results.

Erratum to “Heavy Metals in Soils around the Cement Factory in Rockfort, Kingston, Jamaica” [International Journal of Geosciences 2 (2011) 48-54]  [PDF]
A. Mandal, M. Madourie, R. Maharagh, M. Voutchkov
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.63018
Abstract: This study deals with the distribution of heavy metals in soils around one of the most important industries in Kingston, Jamaicai.e.?the Carib Cement factory at Rockfort. The dust emitted from the Caribbean Cement Company Limited (Carib Cement), located in Rockfort, Kingston, gets deposited in course of time over the soil, leaves and forms a grey cover on the surrounding soils. Geochemical analysis of the top soil, collected from the present study area has been undertaken to assess the impact of the dust emitted from the cement factory and its effect on the surrounding ecosystem. A total of seventeen top soil samples of 0-10 cm depth were collected from the close vicinity of the Rockfort and the Harbour view area and analysed by INAA, AAS, XRF for major, minor and trace elements. Results show that the top soils of the study area are enriched in Pb, Zn, Cr, Cd, V, Pb, and Hg which are released into the air from the cement kilns. Results show that the soils are enriched in Ca with a maximum value of 18% followed by Al, Fe and Na. Heavy metals in the soils of the study area shows relatively high concentrations of zinc with a maximum of 132 ppm followed by Cr (57) ppm and Pb (32) ppm. Maximum concentrations were found in soils sampled at a distance of 2-3m from the cement factory as opposed to samples collected much further ie from the Harbour View area. High concentrations of the heavy metals in the soils near the cement factory as opposed to those further away can be due to the emissions from the factory. A significant contribution can also come from traffic emissions as the study area is located along one of the busiest street of Kingston, Jamaica.
An Intervention Study in Malnutrition Among Infants in a Tribal Community of West Bengal
Mandal ON
Indian Journal of Community Medicine , 2005,
Abstract:
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