3,719 results match your criteria: "Indian Institute Of Technology Delhi[Affiliation]"

Identification of ABC transporter Cdr1 inhibitors of Candida glabrata.

Arch Biochem Biophys

February 2025

School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, 110067, India. Electronic address:

Candida glabrata is one of the most common causes of invasive candidiasis. Rising treatment failures from resistance to current antifungal drugs highlight the need for new antifungals. Overexpression of efflux pump transporter genes is significantly associated with the development of multidrug resistance.

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Surface plasmon enhanced auto-fluorescence and Raman spectroscopy for low-level detection of biological pathogens.

Methods Appl Fluoresc

December 2024

Physics, Indian Institute of Technology Delhi, Room No.: WS-417,, Department of Physics, IIT Delhi, Hauz Khas New Delhi, Delhi, Delhi, 110016, INDIA.

The current culture-based bacterial detection technique is time-consuming and requires an extended sample preparation methodology. We propose the potential of surface-enhanced Raman spectroscopy (SERS) and surface plasmon-enhanced auto-fluorescence spectroscopy (SPEAS) for the label-free identification and quantification of bacterial pathogens at low concentrations collecting its unique auto-fluorescence and Raman signatures utilising highly anisotropic three-dimensional nanostructures of silver nano dendrites (Ag-NDs). The SERS data facilitates qualitative bacterial identification using the spectral features coming from the bacterial cell wall compound, and the SPEAS data was utilised to gain unique auto-fluorescence spectra present on the bacterial cell wall with enhanced quantification.

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Injuries to vulnerable populations on roads and at home.

Int J Inj Contr Saf Promot

December 2024

Transportation Research and Injury Prevention Centre, Indian Institute of Technology Delhi, Delhi, India.

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The emerging field of orbitronics aims to generate and control orbital angular momentum for information processing. Chiral crystals are promising orbitronic materials because they have been predicted to host monopole-like orbital textures, where the orbital angular momentum aligns isotropically with the electron's crystal momentum. However, such monopoles have not yet been directly observed in chiral crystals.

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Herein, we introduce a mild and efficient method for synthesizing aniline biaryls and unsymmetrical phenol biaryls through iodine-catalyzed coupling of quinone imine ketals (QIKs)/quinonemonoacetals (QMAs) and -naphthols. This approach allows for the unusual formation of ortho-substituted anilines and phenols, valuable in pharmaceuticals and advanced materials but typically difficult to produce. Our method achieves high -selectivity without needing transition metals or external/internal templates.

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Inspired by the intricate cellular morphology and the discoid shape of red blood cells (RBCs), biomimetic tricompartmental microcarriers (TCM) with controlled release profiles were engineered using an electrohydrodynamic--jetting technique for efficient management of Parkinson's disease (PD). While jetting, Levodopa (LD), CD (Carbidopa), and ENT (Entacapone) (3 PD drugs) were directly encapsulated in the three individual compartments of the TCM used for oral administration. The optimal shape and controlled release profiles were obtained by employing the Taguchi orthogonal L9 design-of-experiment approach by systematically varying the processing parameters, i.

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Application of multi-angle spaceborne observations in characterizing the long-term particulate organic carbon pollution in China.

Sci Total Environ

January 2025

Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA 30322, United States. Electronic address:

Article Synopsis
  • Ambient PM pollution in China poses serious health risks, despite recent declines in overall PM concentrations; understanding of chemical constituents remains limited due to inadequate monitoring.
  • A Super Learner model using satellite data and other information predicts daily organic carbon (OC) concentrations with high accuracy, revealing elevated levels in Northern China from industrial activities and contributions from forest fires in Yunnan.
  • From 2003 to 2019, national OC levels declined by 1.3% annually, with regional variations, and the OC/EC ratio analysis indicated different pollution sources in urban versus rural areas, highlighting the effectiveness of air quality policies post-2013.
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Gallium is classified as a technology metal as it is important for technological innovations. It is also referred to as a strategic metal, which emphasizes its economic relevance. In addition, gallium is a critical raw material that is strategically important but only available in limited quantities.

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A highly efficient method has been developed for synthesizing 4-dienyl dihydropyridines through the nucleophilic dearomatization of activated pyridines using vinyl sulfoxonium ylides. This reaction follows the sequence involving ylide addition to activated pyridine, [2,3]-sigmatropic rearrangement, and subsequent sulfenic acid elimination. The resulting 4-dienyl dihydropyridines are then used in the synthesis of highly substituted -heterocyles.

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Polymeric materials are commonly used as the outermost layer in spacecraft passive thermal control. However, in geostationary earth orbit environments, the polymeric layer is susceptible to environmental hazards, particularly electrostatic charges. In this study, we develop a graphene-based coating on a polymeric polyimide (Kapton) and discuss its suitability in simulated harsh space environments for electrostatic dissipation.

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Microbial crosstalk: decoding interactions to generate efficient SynComs.

Trends Plant Sci

December 2024

Universidade Federal do Piauí, Teresina, Piauí, Brazil. Electronic address:

Limited studies have explored the complex and intense crosstalk between microbes within synthetic microbial communities (SynComs). Here, we highlight recent findings by Zohair et al., who unraveled the metabolic interactions between co-cultured microbes.

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Carbenes in general and isolable NHCs (N-heterocyclic carbenes) in particular have been useful ligands in recent years. The emergence of CAACs [cyclic(alkyl)(amino)carbenes], BICAACs [bicyclic(alkyl)(amino)carbenes], and many other carbenes has marked revolutionary milestones in this field. These carbenes possess an intriguing blend of highly electrophilic and nucleophilic characteristics, owing to their remarkably narrow HOMO-LUMO energy gap.

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Smartphone-assisted urine analyzers estimate the urinary albumin by quantifying color changes at sensor pad of test strips. These strips yield color variations due to the total protein present in the sample, making it difficult to relate to color changes due to specific analyte. We have addressed it using a Lateral Flow Assay (LFA) device for automatic detection and quantification of urinary albumin.

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Gallbladder cancer (GBC) is one of the common biliary tract malignancies that is often associated with late presentation of clinical symptoms resulting in poor prognosis, thereby considerably increasing the mortality rate. Geographic and ethnic variations are one of the major causes of GBC incidence. However, in addition to genetic susceptibility to GBC, other factors like age, obesity, sex, and exposure to certain heavy chemicals may also lead to the incidence of GBC.

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A convenient and practical method has been developed for synthesizing various -aryl pyrazoles from vinyl sulfoxonium ylides and diazonium salts. When using 1,3-disubstituted vinyl sulfoxonium ylides, the reaction selectively yields 1,3,5-trisubstituted pyrazoles. On the other hand, employing 2,3-disubstituted vinyl sulfoxonium ylides results in the formation of 1,3,4-trisubstituted pyrazoles.

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Article Synopsis
  • WhiB6 is a gene in pathogenic mycobacteria that is upregulated in response to stress conditions like nitric oxide exposure, low oxygen, and during macrophage infections, primarily controlled by the PhoP regulator.
  • The binding of PhoP to specific sequences near the whiB6 gene is crucial for its transcription, and this process is dependent on the phosphorylation of PhoP.
  • Additionally, the small RNA molecule MTS1338 stabilizes the whiB6 transcript during stress conditions, enhancing its expression, which helps to improve our understanding of M. tuberculosis regulation mechanisms.
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Aim: The present study is focused to investigate the role of Raman spectroscopy (RM) for cancer detection.

Methods: In this review, we explored a number of scientific databases including PubMed, Web of Science, Embase and Google Scholar for research studies on Raman spectroscopy for diagnosing cancer. We reported key outcomes of research studies conducted involving Raman spectroscopy for diagnosis of cancer and highlighting the potential of novel Raman spectroscopy for diagnosing cancer in our review.

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Article Synopsis
  • The plasmonic integrated semiconductor enhances light-matter interactions for solar energy harvesting by offering a broader operational spectral range than traditional semiconductors, but it typically has limited efficiency at specific wavelengths.
  • The proposed Au-TiO Schottky photoelectrode utilizes a tailored plasmonic particle grating to significantly boost photon to electron conversion efficiency (IPCE), achieving up to seven times higher performance in certain light conditions.
  • The study confirms that the interaction between plasmonic modes and guided resonances in the grating structure leads to improved charge generation and longevity, presenting a novel integration approach for enhanced energy harvesting technologies.
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Colossal magnetoresistance (CMR) is an exotic phenomenon that allows for the efficient magnetic control of electrical resistivity and has attracted significant attention in condensed matter due to its potential for memory and spintronic applications. Heusler alloys are the subject of considerable interest in this context due to the electronic properties that result from the nontrivial band topology. Here, the observation of CMR near room temperature is reported in the shape memory Heusler alloy NiMnIn, which is attributed to the combined effects of magnetic field-induced martensite twin variant reorientation (MFIR) and magnetic field-induced structural phase transformation (MFIPT).

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Cellulosic supergel for oil and water dual absorption and remediation.

Int J Biol Macromol

December 2024

Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India. Electronic address:

Article Synopsis
  • A new binate cellulosic supergel was created to simultaneously absorb oil and water contaminants, using a high internal phase emulsion (HIPE) method.
  • The scaffold of the supergel was made from a combination of wood pulp cellulose, hydroxyethyl cellulose, and polyacrylic acid, achieving high porosity with micron-sized interconnected pores.
  • This supergel demonstrated a high oil absorption capacity and maintained its performance across multiple cycles, effectively remediating both oil and water pollutants in a single process.
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The development of efficient and stable photoelectrodes is essential for the advancement of photoelectrochemical (PEC) water-splitting technologies, which hold promise for efficient oxygen evolution reaction (OER), necessary for sustainable hydrogen production. In this study, the synthesis of a ternary composite, In S /FeVO /CNT has been reported, designed for highly efficient PEC oxygen evolution. The formation of In S /FeVO heterostructure enhances PEC performance significantly due to the type-II band alignment, which minimizes electron-hole recombination and improves charge separation.

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Enantioselective discrimination is critical in several fields, particularly in pharmaceutics and clinical drug research. Chiral molecules possess unique charge transfer properties, showing an enantioselective preference for electron spin orientation when interacting with the magnetic surface. Here, we developed spin-selective charge transfer (SSCT)-based label-free surface-enhanced Raman scattering (SERS) achiral magnetic substrates for the enantioselective discrimination of chiral molecules without creating asymmetric chiral adsorption sites.

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Gout is a chronic inflammatory condition characterized by elevated uric acid levels in the blood, which can precipitate acute gout attacks in individuals with genetic susceptibility, existing medical conditions, and dietary influences. Genetic predispositions, comorbid medical conditions, nutritional choices, and environmental factors increasingly recognize the multifactorial etiology of the disease. Recent research has highlighted the potential of phytochemicals, particularly flavonoids, saponins, and alkaloids, to manage hyperuricemia (HUA) and its associated complications.

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Purpose: To compare the volume, fat content, and T1 relaxation time of the pancreas in participants with and without prior gestational diabetes mellitus (GDM).

Methods: In this prospective case-control study, we enrolled 29 women with prior GDM, and divided them into three groups (normoglycemic, prediabetic, and diabetic) based on their glycaemic status in the postpartum period; and a group of 13 participants as controls who had normoglycemia during pregnancy. Participants underwent MR examination including an axial multi-echo DIXON-based sequence and an axial-oblique T1 mapping sequence.

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Groundwater (GW) contamination due to municipal solid waste (MSW) disposal in open dumpsites is a pressing global issue. Traditional GW assessment studies are limited to single-depth sampling from nearby wells/handpumps, providing limited insights into subsurface soil characteristics and are prone to cross-contamination. The present study introduces an innovative methodology integrating advanced techniques: Cone Penetration Testing (CPT), Hydraulic Profiling Tool (HPT), Continuous Soil Sampling, and Discrete GW Sampling.

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