Publications by authors named "Haldar S"

Nonlinear effects play a central role in photonics as they form the foundation for most of the device functionalities such as amplification and quantum state preparation and detection. Typically the nonlinear effects are weak and emerge only at high photon numbers with strong drive. Here we present an experimental study of a Josephson junction -based high-impedance resonator.

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Herein, we have reported the application of bench stable perfluoroalkanoic acids as fluoro-alkylating reagents in combination with DIB and primary amides for sequential one-pot transformation to R-embedded functionalized amides under metal-free conditions. The protocol is tolerant to a range of sensitive functional groups (>33 examples and up to 90% yield), and perfluoro acids. Preliminary mechanistic studies, control experiments, in situ F-NMR analyses, and the synthesis of intermediate species were performed to understand the reaction pathways.

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  • Pleural tuberculosis (pTB) is hard to diagnose due to vague symptoms and limited testing options, prompting the development of a new assay using magnetic nanoparticles and antibodies to detect specific antigens related to the disease.
  • The MNp-Ab-Ap assay was created by attaching antibodies to magnetic nanoparticles, enabling the capture of pTB antigens from pleural fluid, which were then identified using specialized aptamers.
  • In testing, the MPT51-based variant of the assay showed a sensitivity of 66.6% and a high specificity of 95.4%, proving to be more effective than existing methods like the Xpert MTB/RIF test, suggesting it could significantly improve pTB diagnosis.
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Background: Fully automatic skull-stripping and tumor segmentation are crucial for monitoring pediatric brain tumors (PBT). Current methods, however, often lack generalizability, particularly for rare tumors in the sellar/suprasellar regions and when applied to real-world clinical data in limited data scenarios. To address these challenges, we propose AI-driven techniques for skull-stripping and tumor segmentation.

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Extracellular vesicles (EVs) have recently emerged as a source of microbe-specific biomarkers for disease diagnosis. In the present study, we evaluated the utility of pleural fluid-derived extracellular vesicles (pEVs) as a source of Mycobacterium tuberculosis (M. tb.

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We present a continuous microwave photon counter based on superconducting cavity-coupled semiconductor quantum dots. The device utilizes photon-assisted tunneling in a double quantum dot with tunneling events being probed by a third dot. Our device detects both single and multiple-photon absorption events independently, thanks to the energy tunability of a two-level double-dot absorber.

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  • The study connects genetic variants linked to coronary artery disease (CAD) with cellular and molecular traits by analyzing chromatin accessibility and gene expression in human coronary arteries.
  • Through single-cell analysis, researchers identified thousands of specific chromatin accessibility loci (caQTLs) and found that smooth muscle cells (SMCs) are particularly susceptible to genetic risks associated with CAD.
  • They developed a comprehensive mapping approach to trace disease variants to potential causal genes across different cell types and confirmed their findings using advanced techniques like genome-wide Hi-C and CRISPR interference.
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Intestinal dysbacteriosis is increasing in broilers due to the reduced use of antibiotics in feed. This study tested the effect of daily waterline administration of a dual-strain probiotic comprising Lactobacillus acidophilus AG01 and Bifidobacterium animalis subspecies lactis AG02, on growth performance and intestinal health during a 3-step microbial challenge. In total, 900 Ross 308 males were assigned to 36 floor pens (25 birds/pen, 12 pens/treatment) in a completely randomized design.

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We report the case of a 67-year-old male with a two-year history of inflammatory polyarthritis, fatigue, and low back pain. He also had a history of biopsy proven neutrophilic dermatosis in the past. On admission and examination, he had pallor.

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Background And Objectives: When older adults face increasing care needs or limited support, remaining safely and comfortably at home becomes challenging. Extant research has primarily concentrated on characteristics of the older adult or their primary caregiver on nursing home admission. This study examines the risk of older adults transitioning to residential care (e.

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Chronic inflammation and tissue fibrosis are common responses that worsen organ function, yet the molecular mechanisms governing their cross-talk are poorly understood. In diseased organs, stress-induced gene expression changes fuel maladaptive cell state transitions and pathological interaction between cellular compartments. Although chronic fibroblast activation worsens dysfunction in the lungs, liver, kidneys and heart, and exacerbates many cancers, the stress-sensing mechanisms initiating transcriptional activation of fibroblasts are poorly understood.

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Herein, we have demonstrated the application of bench-stable polyfluorinated alcohols as fluoroalkylating reagents for a sequential one-pot transformation with ketones to R-CF-embedded 1,5-diketones and pyridines enabled by a nickel catalyst. The protocol is tolerant to a range of functional groups (>31 examples and up to 85% yield) and perfluoro alcohols and releases H and HO as byproducts. Preliminary mechanistic studies, EPR analyses, and deuterium scrambling experiments were performed, and observed / = 2.

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Enveloped viruses enter the host cells by endocytosis and subsequently fuse with the endosomal membranes, or fuse with the plasma membrane at the cell surface. The crucial stage of viral infection, regardless of the route taken to enter the host cell, is membrane fusion. The present work aims to develop a peptide-based fusion inhibitor that prevents membrane fusion by modifying the properties of the participating membranes, without targeting a protein.

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  • The study explores how the timing of glucocorticoid administration (like prednisone) affects heart protection in both healthy and damaged hearts, emphasizing the importance of circadian rhythms.
  • It identifies two key proteins, the glucocorticoid receptor (GR) and Krüppel-like factor (Klf15), which work together to regulate glucose metabolism in heart cells, promoting better glucose uptake and usage.
  • Importantly, administering glucocorticoids during the light phase improved glucose metabolism and heart function in diabetic mice, suggesting that timing could optimize glucocorticoid therapies for heart-related issues.
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Hands are in fact the main route of transmission of pathogenic infections. By using proper hand sanitization, we can break the virus's transmission chain, which is especially important in the ongoing COVID pandemic outbreaks. The effectiveness of hand sanitization is solely dependent on the use of sufficient antibacterial agents, which come in a variety of levels and types, including antimicrobials commercial, water-based, or alcohol-based hand sanitizer, the latter being widely used during pandemics.

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Human induced pluripotent stem cell (hiPSC) to cardiomyocyte (CM) differentiation has reshaped approaches to studying cardiac development and disease. In this study, we employed a genome-wide CRISPR screen in a hiPSC to CM differentiation system and reveal here that BRD4, a member of the bromodomain and extraterminal (BET) family, regulates CM differentiation. Chemical inhibition of BET proteins in mouse embryonic stem cell (mESC)-derived or hiPSC-derived cardiac progenitor cells (CPCs) results in decreased CM differentiation and persistence of cells expressing progenitor markers.

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Background: This study aimed to evaluate the dosimetric and radiobiological differences between 6MV flattened filter (FF) and flattening filter free (FFF) using volumetric modulated arc (VMAT) technique for head and neck (H&N) cancer patients.

Materials And Methods: Fifteen patients with H&N carcinoma were selected and treated with VMAT with FF (VMAT) treatment plan. Retrospectively, additional VMAT treatment plans were developed using FFF beams (VMAT).

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Background: India relies primarily on direct smear microscopy for tuberculosis (TB) diagnosis. However, the low sensitivity of smear microscopy emphasizes the need to improve its performance. We recently described the development of 'TB' kit which showed improved performance over direct smear microscopy at National Reference Laboratories (NRLs) in India.

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Article Synopsis
  • - Tuberculosis (TB) primarily affects the lungs but can also impact the eyes in 2-18% of extrapulmonary cases, making diagnosis a challenge due to elusive symptoms and difficulty in obtaining samples.
  • - A case study is presented of a patient with a recurring chalazion-like eyelid lesion that did not improve with surgery or medication, leading to further investigation.
  • - Ultimately, the lesion was identified as tubercular through microbiological testing, and the patient fully recovered following appropriate antitubercular treatment.
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Introduction: Human metabolism is sustained by functional networks that operate at diverse scales. Capturing local and global dynamics in the human body by hierarchically bridging multi-scale functional networks is a major challenge in physiological modeling.

Objectives: To develop an interactive, user-friendly web application that facilitates the simulation and visualization of advection-dispersion transport in three-dimensional (3D) microvascular networks, biochemical exchange, and metabolic reactions in the tissue layer surrounding the vasculature.

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Aim This study aimed to compare the fracture resistance of different materials used in composite core buildups, including conventional filler composite, nanofiller composite, and short fiber-reinforced composite (SFRC). Methods This in vitro study was conducted on 30 freshly extracted premolars. The teeth were treated using a uniform endodontic procedure, and Fiber Posts (REFORPOST, Angelus) were placed.

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Cholera is an infectious disease that is transmitted through contaminated water. The disease includes a long back history of epidemics. Despite the numerous hygiene and prevention techniques that have been developed for Cholera, outbreaks of cholera are still reported worldwide.

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Most maritime habitats contain microplastic (MPs) contamination. The quality of the benthic ecosystem's habitat is declining as MPs accumulate in marine system. The contamination of MPs must therefore be investigated.

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