Browsing by Author "Chandra Kishore"

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Evaluation of mechanical and thermal properties of thermosetting polymer composites
(Elsevier, 2024) Gagan Bansal; Rakesh Kumar Gautam; Joy Prakash Misra; Chandra Kishore; Abhilasha Mishra; Akarsh Verma
Material characterization and optimization has been the first choice of many researchers in the current scenario. Polymer-based composites are the most desired materials among all other materials because of their easy availability, moldability, and customization characteristics. In this chapter, physical, thermal, and mechanical properties of thermoset polymers are discussed in detail. Some examples of thermosetting polymers are bakelite, epoxies, silicones, vulcanized rubber, polyesters, phenolics, polyurethane, nonisocyanate polyurethane, and melamine-formaldehyde polymers. Physical properties of the material include appearance, color, texture, odor, solubility, density, melting point/boiling point, corrosion resistance, resistivity, and magnetism. Mechanical properties of engineering materials include strength, elasticity, plasticity, ductility, malleability, brittleness, stiffness, hardness, creep, fatigue, resilience, toughness, and weldability, and thermal properties of engineering materials include thermal conductivity, specific heat, thermal expansion, thermal resistance, and thermal shock resistance. Comparative analysis is done among different thermoset polymers and the relevant applications are identified. Further, future prospects of thermoset polymer composites are identified for sustainable development. © 2024 Elsevier Inc. All rights reserved.
Ironing Out the Link: Ferritin and Coronary Artery Disease- a Two-year Perspective on Disease Burden and Prognosis
(Sciendo, 2025) Soumik Ghosh; Rajpal Prajapati; Chandra Kishore; Amit K. Gauraw; Arjun Tandon
Purpose: This study evaluates the association between serum ferritin levels, coronary artery disease (CAD) severity, and survival outcomes over two years. It also examines correlations between ferritin and clinical parameters, including age and creatinine. Methods: A total of 300 CAD patients underwent coronary angiography (CAG). Serum ferritin levels were categorized as low (<30 μg/L), normal (30-300 μg/L for males and 30-200 μg/L for females), and high (>300 μg/L for males and >200 μg/L for females). CAD severity was classified into non-critical, single-vessel, dual-vessel, and triple-vessel disease. Survival outcomes were recorded as alive, deceased, or lost to follow-up. Statistical analyses included Pearson's correlation, Chi-square tests, and Kaplan-Meier survival curves. Results: The mean age was 59.03 ± 9.42 years, with 71.66% males. Hypertension and diabetes were present in 51.66% and 35.33% of patients, respectively. Ferritin levels showed a weak negative correlation with age (r = -0.122, P = 0.035) and a positive correlation with creatinine (r = 0.281, P = 0.001). Elevated ferritin levels were significantly associated with dual-vessel disease (50%) and mortality (P = 0.001). Deceased patients had higher ferritin levels (142.0 μg/L vs. 90.45 μg/L in survivors; P = 0.001). Conclusions: Ferritin is strongly associated with CAD severity and mortality, particularly in dual-vessel disease. Its potential role in early risk stratification suggests clinical relevance. Further research should explore ferritin's mechanistic link to CAD progression and its integration into prognostic models. © 2025 Soumik Ghosh et al., published by Sciendo.