126
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Mandal NK, Biswas R. A study on arsenical dermatosis in rural community of West Bengal. Indian J Public Health 2004; 48:30-3. [PMID: 15704724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
The spatial distribution of chronic arsenicosis due to consumption of arsenic contaminated tube well water in different districts of West Bengal was gradually unfolding since 1983. Arsenical dermatosis was found to be the commonest and earliest manifestation of chronic arsenic toxicity. This study was conduct in Baruipur block of South 24 Parganas district of West Bengal. Total 313 people selected from three randomly selected villages with reported arsenic contamination in tube well water and 342 people living three randomly selected villages without such evidence of contamination were examined as control population. 5.97% of exposed population and 2.05% of unexposed population showed melanosis (p < 0.01). Moreover, 5.11% of exposed population and 0.88% of unexposed population showed keratosis (p < 0.01). The prevalence of dermatosis among exposed population was also seen to have increased with increasing age, from 7.19% in 0-19 year age group to 37.50% in above 40 year group (p < 0.001). Prevalence was also found to be more with increase in level of contamination. The prevalence rate of dermatosis among unexposedgroup was 2.92%. But age adjusted prevalence rate among exposed group was 19.08% at arsenic contamination level of 0.487 ppm. Mean arsenic concentration in nail and hair samples of exposed group was also found higher than the prescribed limit.
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127
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Dahl K, Biswas R, Maroncelli M. The Photophysics and Dynamics of Diphenylbutadiene in Alkane and Perfluoroalkane Solvents. J Phys Chem B 2003. [DOI: 10.1021/jp0300703] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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128
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Sarkar A, Dutta S, Biswas R. Development of a training programme for school teachers on school health service. Indian J Public Health 2003; 47:29-34. [PMID: 15129864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Abstract
A training programme was developed and implemented for 56 primary school teachers of Barasat II block in North 24 Parganas district as per their recommended roles and responsibilities in School health service. The methodology consisted of development of learning objectives, evaluation parameters (questionnaire and check list) and teaching-learning materials. This was followed by pre-training assessment, implementation of training and re-training and evaluation of the outcome 7 days and 3 months after initial training and re-training. One way analysis of variance revealed significant overall improvement of the cognitive, affective and psychomotor domain of learning of school teachers. The need of periodic re-inforcement training with adequate scope of practice under supervision were emphasized.
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129
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Biswas R, Parajuli R, Naik L, Moodley L, Korczyn AD. A conscientious hypertensive who had seizures after a trek. Int J Clin Pract 2003; 57:449-50. [PMID: 12846359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
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130
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Ingram JA, Moog RS, Ito N, Biswas R, Maroncelli M. Solute Rotation and Solvation Dynamics in a Room-Temperature Ionic Liquid. J Phys Chem B 2003. [DOI: 10.1021/jp034231e] [Citation(s) in RCA: 278] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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131
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Biswas R, Dalal M. A yoga teacher with persistent cheilitis. Int J Clin Pract 2003; 57:340-2. [PMID: 12800469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
This is a depiction of an evolving case report right from its presentation to the physician and its documentation and further sharing of it through the net via e-mails and evidence-based-health@jiscmail.ac.uk as well as other colleagues.
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132
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Chellaiah MA, Kizer N, Biswas R, Alvarez U, Strauss-Schoenberger J, Rifas L, Rittling SR, Denhardt DT, Hruska KA. Osteopontin deficiency produces osteoclast dysfunction due to reduced CD44 surface expression. Mol Biol Cell 2003; 14:173-89. [PMID: 12529435 PMCID: PMC140236 DOI: 10.1091/mbc.e02-06-0354] [Citation(s) in RCA: 183] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2002] [Revised: 09/13/2002] [Accepted: 09/20/2002] [Indexed: 01/14/2023] Open
Abstract
Osteopontin (OPN) was expressed in murine wild-type osteoclasts, localized to the basolateral, clear zone, and ruffled border membranes, and deposited in the resorption pits during bone resorption. The lack of OPN secretion into the resorption bay of avian osteoclasts may be a component of their functional resorption deficiency in vitro. Osteoclasts deficient in OPN were hypomotile and exhibited decreased capacity for bone resorption in vitro. OPN stimulated CD44 expression on the osteoclast surface, and CD44 was shown to be required for osteoclast motility and bone resorption. Exogenous addition of OPN to OPN-/- osteoclasts increased the surface expression of CD44, and it rescued osteoclast motility due to activation of the alpha(v)beta(3) integrin. Exogenous OPN only partially restored bone resorption because addition of OPN failed to produce OPN secretion into resorption bays as seen in wild-type osteoclasts. As expected with these in vitro findings of osteoclast dysfunction, a bone phenotype, heretofore unappreciated, was characterized in OPN-deficient mice. Delayed bone resorption in metaphyseal trabeculae and diminished eroded perimeters despite an increase in osteoclast number were observed in histomorphometric measurements of tibiae isolated from OPN-deficient mice. The histomorphometric findings correlated with an increase in bone rigidity and moment of inertia revealed by load-to-failure testing of femurs. These findings demonstrate the role of OPN in osteoclast function and the requirement for OPN as an osteoclast autocrine factor during bone remodeling.
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133
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Biswas R, Paul A, Shetty KJ. A yoga teacher with persistent reflux symptoms. Int J Clin Pract 2002; 56:723. [PMID: 12469992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/27/2023] Open
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134
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Biswas R, Dahl K, Maroncelli M. Rotation and Isomerization of Diphenylbutadiene and 4-(Methanol)Stilbene in Supercritical CO2A Re-Examination. J Phys Chem B 2002. [DOI: 10.1021/jp021538p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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135
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Biswas R, Gupta A. Gelatinous transformation of marrow: an incidental finding in pancytopenia. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2002; 50:1199. [PMID: 12516715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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136
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Biswas R. The birth of poverty. West J Med 2002. [DOI: 10.1136/bmj.325.7354.51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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137
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Biswas R, Ray SK, Dobe M, Dasgupta S, Mandal A. An overview of multicentric training workshops for public health professionals on reproductive and child health programme in India. Indian J Public Health 2002; 46:78-85. [PMID: 12653007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Abstract
The major emphasis of Reproductive and Child Health (RCH) programme in India is delivery of client-oriented, demand driven and broader ranges of high quality, safe and effective services for children, adolescents, mothers and reproductive age group population at large. Increased client satisfaction is considered as main determinant for improved acceptance of the services. Thus, well trained and motivated health personnel are necessary to deal with highly sensitive, personal health issues of the clients, like contraception, abortion, infertility services etc. The Indian Public Health Association organized total 10 workshops in several places of India (A total 322 members, composed of Medical Administrators (54.7%), Faculty members of Medical Colleges (24.5%), Sociologist and Nutritionists (13.9%) and also public health personnel (6.9%) participated in the workshop). Learning objectives and lesson plans etc. were formulated. Accordingly the contents were incorporated in a module, validated and pretested. The training sessions were conducted by briefing, discussion, group exercise and VIPP method and were evaluated by semi structured. The pre/post assessment schedule and scored scale of feedback from participantsAE were used for evaluation. The pre-post assessment scores revealed wide variations of mean score among the participants of several places. Significant post workshop improvement of knowledge was quite evident, with few exceptions. The group variants of pre and post score of results was considered to be due to heterogeneous groups of participants. Review of objectivity and quality of the questionnaire were felt as necessary.
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138
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Patel N, Biswas R, Maroncelli M. Solvation and Friction in Supercritical Fluids: Simulation−Experiment Comparisons in Diphenyl Polyene/CO2 Systems. J Phys Chem B 2002. [DOI: 10.1021/jp0206727] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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139
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Biswas R, Pan BC, Ye YY. Metastability of amorphous silicon from silicon network rebonding. PHYSICAL REVIEW LETTERS 2002; 88:205502. [PMID: 12005575 DOI: 10.1103/physrevlett.88.205502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2001] [Indexed: 05/23/2023]
Abstract
We propose a network rebonding model for light-induced metastability in amorphous silicon, involving bonding rearrangements of silicon and hydrogen atoms. Nonradiative recombination breaks weak silicon bonds and generates dangling bond-floating bond pairs, with very low activation energies. The transient floating bonds annihilate, generating local hydrogen motion. Charged defects are also found. Support for these processes is found with tight-binding molecular dynamics simulations. The model accounts for major experimental features of the Staebler-Wronski effect including electron-spin resonance data, the t(1/3) kinetics of defect formation, two types of metastable dangling bonds, and hysteretic annealing.
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140
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Fleming JG, Lin SY, El-Kady I, Biswas R, Ho KM. All-metallic three-dimensional photonic crystals with a large infrared bandgap. Nature 2002; 417:52-5. [PMID: 11986662 DOI: 10.1038/417052a] [Citation(s) in RCA: 483] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Three-dimensional (3D) metallic crystals are promising photonic bandgap structures: they can possess a large bandgap, new electromagnetic phenomena can be explored, and high-temperature (above 1,000 degrees C) applications may be possible. However, investigation of their photonic bandgap properties is challenging, especially in the infrared and visible spectrum, as metals are dispersive and absorbing in these regions. Studies of metallic photonic crystals have therefore mainly concentrated on microwave and millimetre wavelengths. Difficulties in fabricating 3D metallic crystals present another challenge, although emerging techniques such as self-assembly may help to resolve these problems. Here we report measurements and simulations of a 3D tungsten crystal that has a large photonic bandgap at infrared wavelengths (from about 8 to 20 microm). A very strong attenuation exists in the bandgap, approximately 30 dB per unit cell at 12 microm. These structures also possess other interesting optical properties; a sharp absorption peak is present at the photonic band edge, and a surprisingly large transmission is observed in the allowed band, below 6 microm. We propose that these 3D metallic photonic crystals can be used to integrate various photonic transport phenomena, allowing applications in thermophotovoltaics and blackbody emission.
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141
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Hossain MS, Salam MA, Rabbani GH, Kabir I, Biswas R, Mahalanabis D. Tetracycline in the treatment of severe cholera due to Vibrio cholerae O139 Bengal. JOURNAL OF HEALTH, POPULATION, AND NUTRITION 2002; 20:18-25. [PMID: 12022154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Vibrio cholerae O139 synonym Bengal, recognized in 1993, is the second member in the list of about 200 serogroups of V. cholerae with epidemic and pandemic potential. Although replacement of fluids and electrolytes remains the cornerstone in the management of cholera, antimicrobial therapy can significantly shorten the duration of diarrhoea, and reduce stool volume and requirements ofrehydration fluids. The role of antimicrobial therapy on the natural course of the disease caused by this relatively new pathogen has not been systematically assessed. A randomized, double-blind, placebo-controlled clinical trial was conducted to evaluate the efficacy of tetracycline in the treatment of adults with severe cholera due to V. cholerae O139 Bengal. Forty-three adult males with severe cholera were randomly allocated to receive either 500 mg of tetracycline (n=21) or placebo (n=22) for three consecutive days. Demographic and clinical characteristics of these patients on admission were comparable. Tetracycline therapy was associated with significantly reduced total median (inter-quartile range) stool volume [216.48 (90.18-325.22) mL/kg vs 334.25 (215.12-537.64) mL/kg; p=0.001], higher rates of clinical cure (81% vs 27%; p<0.001), and shorter median (inter-quartile range) duration of diarrhoea [32 (24-48) hours vs 80 (48-104) hours; p<0.001]. The mean +/- (SD) requirement of intravenous fluid was not significantly different between the two groups [146.42 +/- 42.12 mL/kg vs 150.44 +/- 27.21 mL/kg; p=0.70]. The median (inter-quartile range) duration of faecal excretion of V. cholerae O139 was significantly shorter in the tetracycline group than the placebo group [1(1-2) day vs 5 (3-6) days; p<0.001]. The results of the study indicate that tetracycline therapy is clinically useful in the treatment of severe cholera due to V. cholerae O139 Bengal.
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142
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Mundle M, Biswas R, Sinha S, Bhadra U. Drug inventory management in Medical College Hospital, Kolkata. Indian J Public Health 2002; 46:31-3. [PMID: 12652998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
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143
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Abstract
Acquired immunodeficiency syndrome (AIDS) has reached alarming proportions in SE Asia. The magnitude of the epidemic is projected to exceed that of sub-Saharan Africa as we enter the 21st century. Nepal has much in common with India geopolitically and socially and the prevalence of HIV is expected to be no different from the rest of SE Asia. However, evidence thus far paints a different picture altogether--a very low prevalence of HlV even in high-risk population groups. This is surprising, particularly since high-risk behaviour is evidenced by a high rate of drug abuse. In addition, other communicable diseases commonly associated with HIV infection, such as tuberculosis and HBV/HCV infection, are common in Nepal and yet still the prevalence of HIV infection in these patients and in the general population is reported to be low. This paper identifies some of these anomalies and attempts to analyse the reasons for this discrepancy. We emphasize the need for extended survey and strict surveillance to avoid an explosion of this dreaded infection.
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144
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Mondal NC, Biswas R, Manna A. Risk factors of diarrhoea among flood victims: a controlled epidemiological study. Indian J Public Health 2001; 45:122-7. [PMID: 11917333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
The concept and practice of 'disaster preparedness and response', instead of traditional casualty relief, is relatively new. Vulnerability analysis and health risks assessment of disaster prone communities are important prerequisites of meaningful preparedness and effective response against any calamity. In this community based study, the risk of diarrhoeal disease and its related epidemiological factors were analysed by collecting data from two selected flood prone block of Midnapur district of West Bengal. The information was compared with that of another population living in two non-flood prone blocks of the same district. The study showed that diarrhoeal disease was the commonest morbidity in flood prone population. Some behaviours, like use of pond water for utensil wash and kitchen purpose, hand washing after defecation without soap, improper hand washing before eating, open field defecation, storage of drinking water in wide mouth vessels etc. were found to be associated with high attack rate of diarrhoea, in both study and control population during flood season compared to pre-flood season. Attack rates were also significantly higher in flood prone population than that of population in non-flood prone area during the same season. Necessity of both community education for proper water use behaviour and personal hygiene along with ensuring safe water and sanitation facilities of flood affected communities were emphasized.
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145
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Biswas R, Chattapadhyay D. Monitoring and continuing education system of ICDS Programme in Hooghly District, West Bengal. Indian J Public Health 2001; 45:99-103. [PMID: 11917329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
The functioning of "Monitoring and Continuing Education System" of ICDS Programme in Hooghly District was studied through record analysis and individual interviews of Anganwadi Workers (AWW). No Sector Adviser was entrusted the task of monitoring and continuing education activities in 15 out of 17 sectors, supervisors and Health Workers were present in 88.0% and 29.4% sector meetings respectively. The sector meetings were not usually held on fixed dates. Visits of Anganwadi centres (AWC) by Health Workers, Supervisors and Child Development Project Officers (CDPO) were very infrequent and no joint visit was made. Only 11.8% Anganwadi Workers were exposed to continuing education sessions. There was gross under reporting of pregnant mothers and live births. Need of all-round improvement of functioning of 'Monitoring and Continuing Education System' of ICDS Programme is well felt.
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146
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Haldar A, Ray S, Biswas R, Biswas B, Mukherjee D. Effectiveness of training on infant feeding practices among community influencers in a rural area of west Bengal. Indian J Public Health 2001; 45:51-6. [PMID: 11917324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
Total 34 Influencers were trained in a subcentre area of South 24-parganas district of West Bengal. Knowledge was imparted to community influencers on infant feeding practices through lecture, group discussion, question-answer session and hand-on-training by trained health workers. Pre-assessment was done before initiation of training. Repeat training was conducted at frequent intervals within a period of 3 months. Mean score of knowledge of influencers during pre-training assessment was 13.3 and improved thereafter-following training to 20.8 (1st assessment), 20.6 (2nd assessment), 23.7 (3rd assessment) and 25.2 (final-assessment). Repeat training had also desired impact.
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147
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Biswas R, Bhardwaj A, Aggrawal R, Pai C, Krishnanand G, Sen T, Shetty KJ. An unusual paratyphoid fever. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2001; 49:477-8. [PMID: 11762624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Salmonella typhi is known to produce acalculous cholecystitis and related gall bladder perforation. Following is a documentation of a patient of sub-phrenic abscess and gall bladder perforation which was possibly a result of Salmonella paratyphi A.
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148
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Lewis JE, Biswas R, Robinson AG, Maroncelli M. Local Density Augmentation in Supercritical Solvents: Electronic Shifts of Anthracene Derivatives. J Phys Chem B 2001. [DOI: 10.1021/jp0043672] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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149
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Ray SK, Biswas R, Kumar S, Chatterjee T, Misra R, Lahiri SK. Reproductive health needs and care seeking behaviour of pavement dwellers of Calcutta. JOURNAL OF THE INDIAN MEDICAL ASSOCIATION 2001; 99:142-3, 145. [PMID: 11478757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
An unabated growth of street dwellers in the city of Calcutta is reported to be due to twin reasons like, migration of rural poor people as well as uncontrolled fertility among these poor settlers of the city. A community-based study on reproductive health, fertility and related care seeking behaviour was studied among a sample of women of child bearing age living on streets of Calcutta. Besides, the quite common conditions like leucorrhoea (28.5%), menstrual irregularities (12.3%), infertility (2.5%) and STDs (1.3%) were also reported. But most of these illnesses (three-fourth) were uncared for, and the remaining one-fourth sought treatment from govemment institutions, private agencies or even from untrained practitioners (quacks). The reproductive behaviour of street dwelling women was characterised by early marriage, teenage pregnancies, and scarce use of contraceptives (32%) as well as frequent abortions (2.8%). Very few pregnant women received adequate antenatal care (3.8%). Coverage of tetanus toxoid immunisation (68.5%) and proper iron and folic acid supplementation (16.7%) were also poor. Whereas, antenatal care was received mostly from government health institutions (71%), home delivery (ie, on street) was a common practice and conducted mostly by untrained birth attendants (51.8%).
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150
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Sawhney H, Aggarwal N, Biswas R, Vasishta K, Gopalan S. Maternal mortality associated with eclampsia and severe preeclampsia of pregnancy. J Obstet Gynaecol Res 2000; 26:351-6. [PMID: 11147722 DOI: 10.1111/j.1447-0756.2000.tb01338.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To analyse factors associated with maternal mortality in eclampsia and preeclampsia. METHOD Retrospective analysis of 69 maternal deaths due to (eclampsia-61; severe preeclampsia-8) was carried out during a period of 17 years (1982-1998). Maternal condition on admission, associated complications and principal cause of death was analysed in each case. RESULTS Mean time interval between hospitalization and maternal death was 49.56 +/- 62.01 hrs (1-240 hrs). Twenty (28.9%) women died undelivered. Twenty-three (37.7%) women were in grade IV coma and 52.4% of eclampsia patients had recurrent convulsions (> 10) prior to admission. Associated complications in form of hemorrhage, cerebrovascular accidents, acute renal failure, jaundice, aspiration pneumonia and pulmonary oedema were 30.4, 31.8, 34.8, 18.8, 17.8, and 5.8%, respectively. Maternal mortality in eclampsia was significantly low in time period B (4.1%) when magnesium sulphate was used as an anticonvulsant. CONCLUSIONS Maternal condition on admission and associated complications are the major determinant of maternal outcome. Use of magnesium sulphate is associated with significant reduction of maternal mortality.
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