Publications by authors named "Biswas R"

Staphylococcus aureus (S. aureus) is a Gram positive opportunistic pathogen and a major cause for bacterial septic arthritis. Vancomycin is the preferred antibiotic for the treatment of methicillin resistance S.

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Estimating rare event kinetics from molecular dynamics simulations is a non-trivial task despite the great advances in enhanced sampling methods. Weighted Ensemble (WE) simulation, a special class of enhanced sampling techniques, offers a way to directly calculate kinetic rate constants from biased trajectories without the need to modify the underlying energy landscape using bias potentials. Conventional WE algorithms use different binning schemes to partition the collective variable (CV) space separating the two metastable states of interest.

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Melioidosis is a neglected tropical infection caused by the Gram-negative bacterium Burkholderia pseudomallei, which is found in soil and water across tropical countries. The infection spectrum ranges from mild localized lesions to severe sepsis. The clinical presentation, severity, and outcome are influenced by the route of infection, bacterial load, strain virulence, and specific virulence genes of B.

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We investigated the temperature dependence of the intermolecular dynamics, including intermolecular vibrations and collective orientational relaxation, of one of the most typical deep eutectic solvents, reline, using femtosecond Raman-induced Kerr effect spectroscopy (fs-RIKES), subpicosecond optical Kerr effect spectroscopy (ps-OKES), and molecular dynamics (MD) simulations. According to fs-RIKES results, the temperature-dependent intermolecular vibrational band peak at ∼90 cm exhibited a redshift with increasing temperature. The density-of-state (DOS) spectrum of reline by MD simulations reproduced this fs-RIKES spectral feature.

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MRE11 nuclease is a central player in signaling and processing DNA damage, and in resolving stalled replication forks. Here, we describe the identification and characterization of new MRE11 inhibitors MU147 and MU1409. Both compounds inhibit MRE11 nuclease more specifically and effectively than the relatively weak state-of-the-art inhibitor mirin.

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Introduction: Anemia is an important public health disorder. There is a significant chunk of India's population residing in poor housing quality with inadequate sanitation and hygiene, which might lead to higher anemia prevalence. The objective was to determine the association between anemia with poor housing quality among the older Indian adult population (≥45 years) as per residence.

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Chicken meat (broiler) production is a rapidly growing livestock sector in India, and one dominated by contract farming. Studies have reported high levels of antibiotic use in Indian broiler farms which is concerning given this is one of the driving forces for the development of antibiotic resistance. This study used the economic lens of agency theory to examine strategic decisions which occur during contract broiler production and their potential impact on antibiotic use, using West Bengal as a case study.

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Diabetes is a widespread metabolic illness. Mismanagement of diabetes can lead to severe complications that tremendously impact patients' quality of life. The assimilation of nanotechnology in diabetes care holds the potential to revolutionize treatment paradigms, improve patient outcomes, and reduce the economic burden associated with this pervasive disease.

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Cholestatic jaundice is a potentially serious condition that requires early diagnosis for proper management. Fat-soluble vitamin (FSV) deficiency develops as a consequence of cholestasis. Vitamin D deficiency is common and remains a challenge in patients with cholestasis.

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The improper handling and uncontrolled discharge of toxic organic dyes result in significant adverse effects on both human health and the environment. This study investigates the fabrication of SnO₂, yttrium and cobalt dual-doped SnO₂ (YCSn), chitosan-capped SnO₂ (CS*Sn), and chitosan-capped yttrium and cobalt dual-doped SnO₂ (CS*YCSn) nanoparticles using a one-step coprecipitation method for the photocatalytic degradation of methylene blue (MB) under visible light irradiation. Characterization techniques including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM), and ultraviolet-visible (UV-Vis) spectrophotometry confirm the successful synthesis of biodegradable CS*YCSn nanoparticles.

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To realize the aim of easy and accurate detection of ammonia and picric acid (PA) in both aqueous and vapor phases based on function-oriented investigation principles, in the present study, we include a luminescent performance with recognition performance, taking into account the application conditions. Zn(II) ions with luminescence qualities and an amine-substituted imidazole moiety with selective recognition properties towards picric acid and ammonia are coupled to generate a novel 1D luminous Zn(II) coordination polymer, Zn-CP [{Zn(II)( 2-ABZ)2(2-BDC)}].MeOH]∞, where 2-ABZ and 2-BDC stand for terephthalic acid and protonated 2 aminobenzimidazole, respectively.

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Background: About a third of the world's population is estimated to suffer from anaemia, and iron deficiency is expected to account for about half of all anaemia cases. This study was designed to get an estimate of the proportion of patients with iron deficiency anaemia (IDA) who have a significant gastrointestinal (GI) pathology, in particular a GI malignancy, and to identify any risk factors or predictors for the same.

Methods: This cross-sectional study was conducted at a hospital in Eastern India.

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Mycobacterium marinum is a slow growing Non-Tuberculosis Mycobacteria known to cause skin and subcutaneous tissue infections known as "fish tank granuloma" in humans. Treatment of M. marinum skin infections can last for several months or even years.

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Background: Ventilator-associated pneumonia (VAP) is a prevalent nosocomial infection in the intensive care unit (ICU), significantly increasing patient morbidity, mortality, and healthcare costs. Effective management is essential, particularly in the context of antimicrobial resistance and the frequent use of antibiotics in ICUs.

Methods: This prospective pre-post interventional study was conducted in the medical ICU of a tertiary care centre, over 6 months.

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Research underscores the urgent need for technological innovations to treat lung tissue damage from viral infections and the lasting impact of COVID-19. Our study demonstrates the effectiveness of recombinant human NV1 protein in promoting a pro-healing extracellular matrix that regulates homeostasis in response to excessive tissue reactions caused by infection and injury. NV1 achieves this by calibrating multiple biological mechanisms, including reducing hyperinflammatory cytokine levels (e.

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Introduction: Deep mycoses acquired by penetrating trauma to the skin can have varied and sometimes atypical morphological presentations resulting in diagnostic dilemmas and delay in treatment onset. Histopathology can be a useful tool in not only diagnosing but also differentiating various deep mycoses.

Aims And Objectives: To observe various morphological presentations and histopathological features of deep fungal infections.

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We characterize critical points of 1-dimensional maps paired in persistent homology geometrically and this way get elementary proofs of theorems about the symmetry of persistence diagrams and the variation of such maps. In particular, we identify branching points and endpoints of networks as the sole source of asymmetry and relate the cycle basis in persistent homology with a version of the stable marriage problem. Our analysis provides the foundations of fast algorithms for maintaining a collection of sorted lists together with its persistence diagram.

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This work presents two novel devices with a microcontroller and two different light sensors, namely, Light Dependent Resistor (LDR) and Ambient Light Sensor (ALS), which can provide a quantitative output from the colorimetric variations of citrate capped borohydride reduced silver nanoparticles (AgNPs) and citrate capped gold nanoparticles (AuNPs) upon addition of melamine adulterated milk. The limit of detection (LOD) of the LDR setup with AgNPs and AuNPs was found to be 1.24 ppm and 1.

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The emergence of COVID-19 triggered a global health crisis, sparking concerns within the medical community about its interaction with chronic kidney disease (CKD) and the heightened vulnerability of individuals with compromised renal function to severe viral infection and mortality. This retrospective study encompassed all adult patients with laboratory-confirmed COVID-19 and pre-existing CKD admitted between May 2020 and May 2023. Their demographic data, relevant clinical parameters, and laboratory values were collected.

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Article Synopsis
  • Heat-resistant molds (HRM) are a major concern for food industries as they can survive high temperatures and thrive in various environments.
  • The study tested how high sugar levels, low pH, and temperature affect HRM growth, finding that while HRMs developed visible colonies quickly at certain sugar levels, they showed no growth at the highest sugar concentration (60°Brix).
  • Results indicated that certain HRM strains are particularly vulnerable to low temperatures, but overall, their resilience can compromise the safety and quality of fruit products, highlighting the need for improved control measures.
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In the present study, we have synthesized and thoroughly characterized two Ru(II) dimers with compositions [(ttpy)Ru(tpvpt')Ru(ttpy)](ClO) and [(ttpy)Ru(t'pvpvpt')Ru(ttpy)](ClO) incorporating phenylene-vinylene-substituted terpyridine bridging ligands capable of coordinating in both an NNN- and cyclometalated NNC-fashion. The complexes display strong absorption across the entire UV-vis spectral domain and exhibit luminescence in the NIR region (820-850 nm). The N atoms in the outer coordination sphere were employed for alteration of the photoredox behaviors of the complexes via acid-base equilibria.

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Objectives: This study was conducted with the aim of assessing the correlation between highly sensitive C reactive protein (hsCRP) levels and indicators of disability and functional impairment in individuals presenting with acute ischaemic stroke (AIS).

Design: Cross-sectional study.

Setting: Department of General Medicine at the All India Institute of Medical Sciences, Patna, Eastern India from August 2022 to August 2023.

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MALDI-TOF MS, though has facilitated rapid and accurate anaerobe identification, the problem of rising metronidazole resistance amongst the members of Bacteroides fragilis group is cause for concern. In this one-year study period,152 anaerobic Gram negative bacilli and 60 Gram positive anaerobes were isolated from 167 samples obtained from clinically suspected anaerobic infections. Bacteroides fragilis accounted for 56 % of the total anaerobic GNB and Peptoniphilus asacchrarolyticus was the most commonly isolated Gram positive cocci.

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Article Synopsis
  • - This study investigates how irregular sleep patterns affect the risk of major cardiovascular events (MACE) among adults aged 40-79, using data from wrist-worn accelerometers to measure sleep regularity.
  • - Results from over 72,000 participants show that those with irregular sleep are at a significantly higher risk of MACE, with the risk increasing as sleep regularity decreases.
  • - Importantly, while adequate sleep duration can reduce MACE risk for moderately irregular sleepers, it doesn't offset the high risk for those with irregular sleep, highlighting the need to consider sleep regularity in health guidelines.
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