Publications by authors named "Ak Das"

Primary prevention of diabetes still remains as an unmet challenge in a real world setting. While, translational programmes have been successful in the developed nations, the prevailing social and economic inequities in the low and middle income countries, fail to integrate diabetes prevention into their public health systems. The resulting exponential increase in the prevalence of diabetes and the cost of treatment has put primary prevention in the back seat.

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The orbital-free density functional theory (OF-DFT) based method is a convenient tool to carry out electronic structure calculations scaling almost linearly with the number of electrons. However, the main impediment in the application of this method is the unavailability of the accurate form for the non-interacting kinetic energy functional in terms of electron density. The Pauli kinetic energy functional is the unknown part of the kinetic energy functional, and the corresponding Pauli potential appears in the governing Euler equation.

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The current study investigated the impact of nutmeg essential oil (NEO) and tea tree essential oil (TTEO) on the preservation of raw chicken fillets during nine days of refrigerated storage study. The primary aim was to explore the antioxidant and antimicrobial properties of these essential oils (EOs) and assess their ability to extend the shelf life of poultry meat. Gas chromatography-mass spectrometry (GC-MS) was utilized to identify the chemical compositions of NEO and TTEO, revealing the presence of compounds like myristicin and terpenoids, known for their antimicrobial and antioxidant activities.

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We present a comprehensive overview of the commissioning process and initial results of a synchrotron beamline dedicated to atomic, molecular, and optical sciences at the BL-5 undulator port of the Indus-2 synchrotron facility, Raja Ramanna Center for Advanced Technology, Indore, India. The beamline delivers a photon flux of ∼1012 photons/s with high resolving power (∼10 000) over an energy range of 6-800 eV, making it suitable for high-resolution spectroscopy in atomic, molecular, and optical science. The energy tunability from vacuum ultraviolet to soft x-ray (6-800 eV) is achieved through a varied line spacing plane grating monochromator with four gratings: very low energy (VLEG), low energy (LEG), medium energy (MEG), and high energy (HEG).

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Breast cancer is a significant health challenge, with accurate and timely diagnosis being critical to effective treatment. Immunohistochemistry (IHC) staining is a widely used technique for the evaluation of breast cancer markers, but manual scoring is time-consuming and can be subject to variability. With the rise of Artificial Intelligence (AI), there is an increasing interest in using machine learning and deep learning approaches to automate the scoring of ER, PR, and HER2 biomarkers in IHC-stained images for effective treatment.

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The complex cell envelope of pathogenic mycobacteria provides a strong barrier against the host immune system and various antibiotics. Phosphatidyl-myo-inositol mannosides (PIMs), lipomannan (LM), and lipoarabinomannan (LAM) are structurally important elements of mycobacterial cell envelope and also play crucial roles in modulating the host immune functions. At the cytoplasmic side of the mycobacterial inner membrane, phosphatidyl-myo-inositol (PI) is mannosylated by α-mannosyltransferases PimA and PimB' to synthesize PIM using GDP-mannose (GDPM) as the mannose donor.

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Article Synopsis
  • Bottom-up design of electronic materials relies on precisely controlling self-assembly, using atomically precise metal nanoclusters (NCs) as modular building blocks.
  • A new molecular silver nanocluster (0 D Ag-NC) was assembled into a one-dimensional nanocluster chain (1 D Ag-CAM) using 4,4'-bipyridine linkers, both exhibiting cuboctahedron geometries protected by organic ligands.
  • The 1 D Ag-CAM device showed superior resistive switching behavior with increased durability, a higher current ratio, and demonstrated negative differential resistance, underscoring the significance of connecting molecular nanoclusters for improved electronic memory properties.
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Introduction: A slower adoption rate of fixed dose combinations (FDC) in diabetes management is partly due to insufficient data. This study evaluates the safety and efficacy of an FDC of dapagliflozin + sitagliptin + metformin hydrochloride extended release (XR), compared to a dual FDC of sitagliptin + metformin hydrochloride XR among patients with type 2 diabetes mellitus (T2DM) with poor glycemic control when treated with metformin monotherapy.

Methods: A total of 274 patients with T2DM were randomized (1:1) to either arm X, receiving FDC of dapagliflozin (10 mg) + sitagliptin (100 mg) + metformin hydrochloride XR (1000 mg) (Dapa + Sita + Met) tablets, or arm Y, receiving sitagliptin phosphate (100 mg) + metformin hydrochloride XR (1000 mg) (Sita + Met) tablets, and treated for 16 weeks.

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  • The study focuses on detecting multijet signatures from proton-proton collisions at a high energy of 13 TeV, analyzing a dataset totaling 128 fb^{-1}.
  • A special data scouting method is utilized to pick out events with low combined momentum in jets.
  • This research is pioneering in its investigation of electroweak particle production in R-parity violating supersymmetric models, particularly examining hadronically decaying mass-degenerate higgsinos, and it broadens the limits on the existence of R-parity violating top squarks and gluinos.
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Recessive shrunken2 (sh2)-based sweet corn is preferred worldwide as it possesses higher sugar and extended shelf life. However, traditional sh2-based sweet corn is poor in vitamin A and vitamin E. Here, parental lines of two sh2-based sweet corn hybrids, viz.

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  • The text discusses the importance of detecting non-steroidal anti-inflammatory drugs (NSAIDs) due to their common use and possible effects on health and the environment.
  • Recent advancements in sensing technologies for NSAIDs are explored, particularly focusing on molecular receptors using specialized fluorescent molecules and advanced nanostructured assemblies.
  • The review also addresses the binding mechanisms, challenges, and future directions in developing innovative sensors for rapid and selective NSAID detection, filling a gap in the existing literature on this topic.
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Background: Hypoglycemia is a serious, often overlooked complication of treating hyperkalemia with insulin and dextrose. If not recognized and managed, it can increase morbidity and mortality. This study aimed to estimate the incidence of hypoglycemia in hyperkalemic patients treated with 10 units of intravenous insulin, 50 ml of 50% dextrose, 10 ml of 10% calcium gluconate, and salbutamol nebulization.

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Nitrogen fixation in legume nodules is crucial for plant growth and development. Therefore, this study aims to investigate the effects of nitric oxide [S-nitrosoglutathione (GSNO)] and silicon [sodium metasilicate (Si)], both individually and in combination, on soybean growth, nodule formation, leghaemoglobin (Lb) synthesis, and potential post-translational modifications. At the V1 stage, soybean plants were treated for 2 weeks with 150 µM GSNO, and Si at concentrations of 1 mM, 2 mM, and 4 mM.

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Cellular processes are dynamic and often oscillatory, requiring precise coordination for optimal cell function. How distinct oscillatory processes can couple within a single cell remains an open question. Here, we use the cyanobacterial circadian clock as a model system to explore the coupling of oscillatory and pulsatile gene circuits.

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  • Developing a cost-effective and efficient electrocatalyst for hydrogen and oxygen evolution reactions is a significant research challenge due to its potential in energy storage and conversion.
  • This study presents two types of covalent organic networks synthesized from isoindigo: a crystalline 2D framework (I-TTA COF) and an amorphous fibrous polymer (I-TG COP).
  • The I-TTA COF demonstrates superior electrocatalytic performance, achieving a current density of 10 mA cm-2 with minimal overpotentials for both HER and OER while maintaining its activity after extensive testing.
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The first search for soft unclustered energy patterns (SUEPs) is performed using an integrated luminosity of 138  fb^{-1} of proton-proton collision data at sqrt[s]=13  TeV, collected in 2016-2018 by the CMS detector at the LHC. Such SUEPs are predicted by hidden valley models with a new, confining force with a large 't Hooft coupling. In events with boosted topologies, selected by high-threshold hadronic triggers, the multiplicity and sphericity of clustered tracks are used to reject the background from standard model quantum chromodynamics.

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The prevalence of hypertension is on the rise, with approximately 200 million individuals affected by this condition in India. Epidemiological studies suggest that one in every three adults in India has hypertension. Fixed-dose combinations (FDCs) present a potential strategy to address the challenge of effective blood pressure control.

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Squamous cell carcinoma of the oral cavity is the most common malignancy of head and neck cancer in India. With nodal dissemination, there is a significant decrease in survival. This study is aimed at studying the impact of occult metastasis on an estimated overall survival in clinically N0 patients post neck dissection.

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Shifting cultivation, an age-old agricultural practice, is a major factor in forest cover change across Southeast Asia, where repeated cycles of vegetation disturbance and regrowth lead to far-reaching environmental and socio-economic impacts. The present study aims to assess the spatio-temporal patterns of vegetation disturbance and regrowth caused by shifting cultivation in Tripura state of India, over the past three decades, utilizing temporal segmentation of time-series Landsat data. The study analyzed vegetation disturbance and regrowth patterns in a shifting cultivation landscape from 1991 to 2020 using normalized burn ratio trends through LandTrendr, validated by the TimeSync tool.

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  • * The research introduces a new model called NATURE, which uses a multi-level clustered structure to improve attack resistance, reduce communication load, and enhance efficiency in industrial settings.
  • * NATURE incorporates a multifactor trust estimation framework that evaluates node performance based on behavior, energy use, and communication reliability, enabling adaptive trust assessments and prioritizing recent node actions for better network dependability.
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  • Aplastic anemia (AA) is a condition that leads to low blood cell counts and is linked to issues with telomeres, which are protective caps on chromosomes.
  • A study of eleven AA patients between ages one and twelve revealed clinical symptoms like upper limb anomalies and short stature, alongside significantly shorter telomere lengths compared to healthy peers.
  • The research indicates that the telomere maintenance pathway is compromised in these patients, with treatments involving androgen and prednisolone reducing the levels of TERRA, suggesting a connection between telomere dysfunction and AA in younger patients.
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A multifunctional rhodamine derivative containing azo-salicylaldehyde (BBS) was designed and synthesized as a colorimetric and fluorescence turn-on probe for the selective detection of copper cations (Cu) and hypochlorite anions (OCl) in aqueous media. In the presence of Cu, the probe BBS exhibited turn-on absorption and fluorescence change at 554 nm and 585 nm, respectively. The binding mechanism of BBS with Cu induces the opening of a spirolactam ring in the rhodamine moiety by the formation of a metal-ligand complex, achieving 10-fold enhancement in fluorescence and quantum yield, along with a binding constant of 1 × 10 M and a detection limit of 2.

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The first search for the Z boson decay to ττμμ at the CERN LHC is presented, based on data collected by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138  fb^{-1}. The data are compatible with the predicted background. For the first time, an upper limit at the 95% confidence level of 6.

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  • * This study examines how different milling methods and moisture levels in wood affect the microstructure and distribution of extractives in the wood powders.
  • * Results indicate that wood powders from multi-blade shaft milling maintain a smoother and more intact structure, while hammer mill powders show rougher surfaces and more damage, affecting their potential use in future applications.
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  • Benzoic acid (BA) and oregano essential oil (OEO) are effective alternatives to commercial coccidiostatic drugs, showing improved growth and health in broiler chickens.
  • When used together, BA and OEO significantly reduce harmful gut bacteria while enhancing weight gain and feed efficiency compared to traditional treatments.
  • The combination also positively influences immune responses, improving gene expression related to inflammation and immunity.
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