12 research outputs found

    Metabolic Syndrome: a challenging health Issue in highly urbanized Union Territory of north India

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    <p>Abstract</p> <p>Objectives</p> <p>1. To determine the prevalence of Metabolic Syndrome in adults aged 18 years and above in Chandigarh, India. 2. To determine the socio-demographic factors associated with MS. 3. To determine the agreement between IDF (International Diabetes federation definition) and ATP-III (National Cholesterol Education Program Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults criteria).</p> <p>Methods</p> <p>In a community based cross-sectional study, total 605 subjects aged 18 yrs and above were studied using multistage random sampling.</p> <p>Results</p> <p>Prevalence of Metabolic Syndrome was estimated by using IDF and ATP-III criteria. By IDF, Metabolic Syndrome was found in 287 (47.4%) subjects and it was more prevalent among females 171 (59.6%) as compared to males 116 (40.4%). By applying ATP-III overall prevalence was less i.e. 233 (38.5%) but again its prevalence was more among females 141 (44.8%) than males 116 (39.5%). Higher socioeconomic status, sedentary occupation and high body mass index were significantly associated with Metabolic Syndrome.</p> <p>Conclusions</p> <p>Metabolic Syndrome is a major health problem in the region and proper emphasis should be given on its prevention and control.</p

    Thermal Study of Accumulation of Conformational Disorders in the Self-Assembled Monolayers of C-8 and C-18 Alkanethiols on the Au(111) Surface

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    The thermal stability of short alkanethiol CH3(CH2)7SH(C8)CH_3(CH_2)_7SH (C_8) and long C_1_8 self-assembled monolayers (SAMs) is investigated using grazing angle reflection-absorption infrared spectroscopy, cyclic voltammetry, and molecular dynamics simulation. We track the disordering of SAM by untilting and gauche defect accumulation with increasing temperature in the 300-440 K range, a range of interest to tribology. Molecular dynamics simulation with both fully covered and partially covered C_6, C_8, and C_1_8 monolayers brings out the morphological changes in the SAM, which may be associated with the observed thermal stability characteristics. The molecular dynamics simulations reveal that short-chain C6C_6 and C8C_8 alkanethiols are more defective at lower temperature than the long-chain C_1_8 alkanethiol. With increasing temperature disorder in the SAM, as reflected in both untilting and gauche defect accumulation, tends to saturate at temperatures below 360 K for short-chain SAMs such that any further increase in temperature, until desorption, does not lead to any significant change in conformational order. In contrast the disorder in the long-chain C_1_8 SAM increases monotonically with temperature beyond 360 K. Thus, in a practical range of temperature, the ability of a SAM to retain order with increasing thermal perturbations is governed by the state of disorder prior to heat treatment. This deduction derived from molecular dynamics simulation helps to rationalize the significant difference we have observed experimentally between the thermal response of short- and long-chain thiol molecules
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