Sabyasachi Ray - Academia.edu (original) (raw)

Papers by Sabyasachi Ray

Indian Journal of Obstetrics and Gynecology Research, 2021

In view of the prevailing COVID-19 pandemic, people should have adequate knowledge about cause of... more In view of the prevailing COVID-19 pandemic, people should have adequate knowledge about cause of the disease, mode of spread and the protective measures against it. Basic protective measures against the Coronavirus disease have been laid out by WHO for the public which are practicing hand hygiene, social distancing and wearing a mask. Good knowledge status when coupled with optimistic attitude will lead to effective practice of the protective measures.: This study will assess the knowledge, attitude and practices about Coronavirus disease among pregnant females of rural West Bengal. It will help in finding the limiting factors and assess the association between knowledge and attitude, practices of the respondents. It is a hospital based cross-sectional study carried out in antenatal out patient department from 18 October, 2020 to 5 December, 2020. 500 pregnant women were enrolled through simple random sampling after proper informed consent. Significant association between knowledge...

Paripex Indian Journal Of Research, 2016

Background : A cross-sectional study was carried among 226 male ‘Mundas’, a native tribal populat... more Background : A cross-sectional study was carried among 226 male ‘Mundas’, a native tribal population resides at remote villages of Paschim Medinipore District, West Bengal, India to investigate effect of age variations on anthropometric parameters of those backward class population of the society. Methodology : The subjects included for the study were categorized into three age groups: Group I: <30 years, Group II: 30-49 years, Group III: ≥ 50 years. Body height, weight, circumferences and skinfold data were collected following standard anthropometric techniques. Body mass index (BMI), body composition variables and indices were derived using standard equations. Results : Findings revealed significant (p<0.05) negative correlations for age dependent variations with most of the anthropometric parameters and body composition variables and indices. Alongside for all these variables, a significant negative impact of age was established following regression study. Frequency of unde...

International journal of current research and review, 2015

International journal of scientific research, 2016

Across sectional study wascarried out fora duration of four years (2011 to 2015)onpregnant mother... more Across sectional study wascarried out fora duration of four years (2011 to 2015)onpregnant mothers being monitored for oral glucose tolerance test (OGTT) admitted to Department of Obstetrics and Gynaecology, Midnapore Medical College and Hospital, West Bengal to find out its influence during pregnancy on complications during pregnancy and labor along with foetal growth, newborn body weight (macrosomal birth), malformations and still-births.The frequency of pregnant women participating in OGTT tests significantly (p<0.05) increased from 20% to 50%. Percentages of pregnant mother suffering from gestation diabetes mellitus (GDM) increased from 2% to 8% (p<0.05) during the observed period though maternal complications, infant mortality, stillbirths along with other foetal declined during the same period. A significant (p<0.05) decline in the percentage (from 14.1% to 13.2%) of birth rate of macrosomal babies was also noted.Results concluded that regular measurements of glucose ...

INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH, 2021

Burns during pregnancy inuence maternal as well as fetal outcome. Keeping this in view this stud... more Burns during pregnancy inuence maternal as well as fetal outcome. Keeping this in view this study was undertaken to evaluate the maternal and fetal outcome in relation to burn extent, gestational age and etiology of burns. This descriptive observational study was performed over three years period. Atotal of 16 cases of burn females with pregnancy were analyzed. There were 6 (37.5%) maternal death and 9 (56.25%) fetal deaths in our study. The mean percentage of total burn surface area (TBSA) was signicantly higher in cases of maternal or fetal death (p ≤0.0001 and 0.0001 respectively). The maternal and fetal mortality rates were also signicantly higher when the burn was suicidal (p≤0.001 and p=0.001, respectively). Gestational age appeared unrelated to maternal mortality and the rate of fetal mortality decreased with increasing gestational age. Percentage of TBSAburn, suicidal burn injury was correlated with a higher maternal and fetal mortality.

ACS applied materials & interfaces, May 8, 2016

Natural origin bioceramics are widely used for bone grafts. In the present study, eggshells deriv... more Natural origin bioceramics are widely used for bone grafts. In the present study, eggshells derived bioceramic scaffold is fabricated by 3D printing as a potential bone graft analogue. The eggshells, a biological waste material, was mixed with a specific ratio of phosphoric acid and chitosan as to form precursor towards the fabrication of osteoinductive, multi-phasic calcium phosphate scaffold via a coagulation assisted extrusion and sintering for multi-scalar hierarchical porous structure with improved mechanical properties. Physico-chemical characterization of the formed scaffolds was carried out for phase analysis, surface morphology and mechanical properties. The similar scaffold was prepared using chemically synthesized calcium phosphate powder which was compared with natural origin one. The higher surface area associated with interconnected porosity along with multiple phases of natural origin scaffold facilitated higher cell adhesion and proliferation as compared to chemicall...

Iranian journal of medical sciences, 2011

Malignant phylloides tumor is a relatively rare and rapidly growing tumor of the breast. Presenta... more Malignant phylloides tumor is a relatively rare and rapidly growing tumor of the breast. Presentation during pregnancy is uncommon. Reports regarding malignancy in these tumors differ greatly in incidence, and most of them are stromal malignancies. We report this case in which 24-year old primigravid patient in the 36(th) week of her pregnancy had a malignant phylloides tumor of breast with sudden growth and fine needle aspiration cytology of the breast was positive for malignancy. Ultimately after her caesarean delivery, excision biopsy was in favor of a malignant process. Pregnancy with nulliparous prolapse is also a rare condition. Those conditions are not associated with each other, but presence of two rare conditions in the same time in the same person is unique.

Journal of the Indian Medical Association, 2011

The objective of this study is to find out the reasons behind drop out of the mothers from the pr... more The objective of this study is to find out the reasons behind drop out of the mothers from the prevention of parent to child transmission (PPTCT) programme, thereby going undiagnosed of their HIV serostatus. A retrospective 6-year study was undertaken among mothers attending antenatal clinic and the unbooked cases delivering at the medical college. The percentage of mothers taking pretest counselling was 95.19; 94.09 per cent agreed to have their blood tested among those who had registered at the antenatal clinic only. Of them, 33 were found to be seropositive, 12 being found in 2009 alone. But the daily average of unbooked cases delivering at this institution was 16.42 out of 28. And a huge number (58.9%) were unregistered ie, unknown HIV serostatus deliveries were taken place during this 6-year of study (2004-2009). By this study we have found out that our ignorance, work pressure and patients' lack of knowledge, fear of so called 'HIV-AIDS', social stigmas are creatin...

Medical Journal Armed Forces India, 2012

Myiasis is infestation by dipterous larva that thrives on host's living or necrotic tissue and ca... more Myiasis is infestation by dipterous larva that thrives on host's living or necrotic tissue and cause massive tissue infection. We present a case of Myiasis in uterine cavity of a prolapsed uterus of a 77-year-old multiparous lady of West Midnapore District, West Bengal, India. It is a very rare case as only a few reports have been previously published in literature. She had presented with genital pruritus and vague perennial discomfort for last 1 month along with bleeding and foul smelling discharge from vagina for last 2 days. Pelvic examination revealed 'Stage-IV' genitourinary prolapse according to POP-Q classification, with a big excavatory ulcer indwelled with maggots of Musca domestica. About 80 to 90 such maggots were subsequently manually removed with a forceps under anaesthesia. She was advised to undergo definitive surgical treatment for prolapsed uterus. Owing to very low socioeconomic condition or for the fear of the operation, the patient ultimately never turned up.

Http Dx Doi Org 10 1080 00222338608063390, Dec 6, 2006

Abstract Polyamideimide was synthesized from rosin-maleic anhydride adduct by the reaction of its... more Abstract Polyamideimide was synthesized from rosin-maleic anhydride adduct by the reaction of its acid chloride with diaminodiphenyl-methane. The same polymer has also been prepared by the self-polycondensation of the amino acid prepared from the adduct ...

Die Angewandte Makromolekulare Chemie, 1984

Journal of Macromolecular Science: Part A - Chemistry, 1986

Renewable-Resource Materials, 1986

Sundarban mangrove ecosystem is consisted of many islands both virgin and reclaimed in nature. A ... more Sundarban mangrove ecosystem is consisted of many islands both virgin and reclaimed in nature. A seven compartment model featuring different forms of nitrogen in soil and water is applied on virgin island in order to compare for estimating several parameters with reclaimed island. The physical, chemical factors and other rate parameters are retained same as in reclaimed island model, published before. The study is carried out for over two years, primary and secondary data are used in the model belong to same time scale for both the islands. Loss rate of soil organic nitrogen as humic acid and fulvic acids is very sensitive parameter for both the systems. Model results depict that virgin island is detritus based system governed by leaching and microbial processes.

Progress in Polymer Science, 1989

Journal of Polymer Science Part A: Polymer Chemistry, 1986

Page 1. Polymers from Renewable Resources. 11. Synthesis of Polyamideimides by Triphenyl-phosphin... more Page 1. Polymers from Renewable Resources. 11. Synthesis of Polyamideimides by Triphenyl-phosphine-Polyhalocompound Activated Polycondensation SABYASACHI SINHA RAY, ACHINTYA K. KUNDU, MALAY GHOSH ...

Journal of Materials Science, 1993

The annealing of cast AI(Mg)-AI203 particulate composite at temperatures of 673, 723 and 773 K fo... more The annealing of cast AI(Mg)-AI203 particulate composite at temperatures of 673, 723 and 773 K for varying periods of time from 1 5 h resulted in reduction of strength and hardness similar to that occurring in cast AI-Mg alloy, due to homogenization. However, the ductility of the composite increased on annealing, contrary to that observed in cast AI-Mg alloy, presumably because the solution of the eutectic in the composite causes magnesium diffusion to the alumina particles resulting in further reaction to form magnesium aluminate and does not increase the magnesium level of its primary phase, as occurs in AI-Mg alloy.

Journal of Materials Science, 1994

Estimates of toughness in terms of Charpy impact energy and the critical stress intensity factor,... more Estimates of toughness in terms of Charpy impact energy and the critical stress intensity factor, KICV using deeply chevron-notched specimens were made for two casts of niobium-bearing high-strength low-alloy (HSLA) steels. KICV determinations are carried out for the first time using both three- and four-point bend loading configurations for this material. Quantitative analyses of the material microstructures are made with

Journal of Materials Science, 1987

The effects of volume fraction of alumina and porosity on the tensile strength of AI-4 wt% Mg-alu... more The effects of volume fraction of alumina and porosity on the tensile strength of AI-4 wt% Mg-alumina compocast particulate composite tested at various temperatures up to 623 K have been investigated with the help of a phenomenological model. The contribution of porosity on reduction of strength of composites at various levels of alumina content has been expressed as a linear function of porosity and the resulting equation contains two experimentally determined parameters, %, the ultimate tensile strength at zero porosity level and ~, a weakening factor. It is observed that ~ decreases with an increase in volume fraction of alumina in the composite and it becomes more sensitive to alumina content of the composite with a rise in temperature. At a given alumina content ~ increases with a rise in test temperature but this effect is gradually countered by increasing alumina content of the composite. Finally, in a composite having ~ 10.3vo1% alumina ~ decreases with an increase in temperature. This may have occurred because the extent of particle-matrix debonding is determined by the plastic strain in the matrix and the fracture strain of a composite increases or decreases with temperature when the alumina content lies below or above ~ 9.0vot% of alumina respectively. At any test temperature o 0 of the composite decreases rapidly with an increase in volume fraction of alumina, but the rate of decrease of o 0 reduces at higher alumina levels. However at the elevated temperatures of 473 K and 573 K a sharp fall in 00 is observed at alumina contents beyond ~--9.0vol %. At a lower level of alumina content below about 8.98 vol % the fracture strain of the composites increases with an increase in temperature. However, in the case of higher alumina content beyond the level mentioned above the fracture strain of the composites decreases with the rise in temperature. At a given porosity level the fracture strain of a composite having about 9.4vol % alumina decreases with an increase in temperature. Scanning electron microscopic observations show that the extent of the growth and linkage of voids before fracture become extensive at higher temperature. At ambient temperature the composites fail by a mixed mode of ductile and clevage fracture. At 573 K a number of considerably small dimples along with the larger ones are observed in the fractured surface. At this temperature a large number of newly formed fine grains are observed in the matrix.

Journal of Applied Polymer Science, 1988

Polyamideimides were synthesized from rosin maleic anhydride adduct either by reacting the acid c... more Polyamideimides were synthesized from rosin maleic anhydride adduct either by reacting the acid chloride of the latter with different diamines or by self-polycondensation of rosin imido amino acid in the presence of thionyl chloride. The rosin imido amino acids were prepared by condensing rosin-maleic anhydride adduct with diamines. The presence of lithium chloride was found to have pronounced effect on yield and molecular weight of the polymers. The polyamideimides were characterized by infrared, elemental analysis, and viscosity measurements. The polymers were either amorphous or poorly crystalline in nature and soluble only in highly polar solvents. The thermal stability of the polymers has been studied. Some generalizations about structure-property relation in polyamideimides were made.