Publications by authors named "Kumaravel S"

In this study, graphitic carbon nitride (CN) and tungsten trioxide (WO) were successfully incorporated into bromine (Br)-doped graphitic carbon nitride (BCN) using an in-situ hydrothermal method. The photocatalytic efficiency of the resulting WO/Br-doped CN (WBCN) composites for the removal of tetracycline (TC) antibiotics under sunlight irradiation was evaluated. The mass ratio of WO to Br-doped CN (BCN) significantly influenced TC adsorption and photocatalytic degradation, with an optimal ratio of 9:1.

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Alcohol-based fuels have shown high compatibility with spark-ignition (SI) engines, which require improvements in fuel efficiency and emissions reduction to meet modern environmental standards. While extensive research has been conducted on ethanol and other lower-order alcohols, there has been comparatively limited investigation into higher-order alcohols like butanol and pentanol as fuel alternatives. Previous studies on pentanol-gasoline blends in SI engines have demonstrated improved engine performance and reduced emissions.

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In this study, the chaotic behavior of a second-order circuit comprising a nonlinear resistor and Chua's diode is investigated. This circuit, which includes a nonlinear capacitor and resistor among its components, is considered one of the simplest nonautonomous circuits. The research explores various oscillator characteristics, emphasizing their chaotic properties through bifurcations, Lyapunov exponents, periodicity, local Lyapunov region, and resonance.

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Background: Enteric infections are hypothesized to be associated with intussusception in children. A small increase in intussusception following rotavirus vaccination has been seen in some settings. We conducted post-marketing surveillance for intussusception following rotavirus vaccine, Rotavac introduction in India and evaluated association of intussusception with enteric pathogens.

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Article Synopsis
  • The study looked at how well parents follow safety rules for their kids aged 1 to 5 and why they don't.
  • Out of 120 kids, many were injured, with falls and burns being the most common types.
  • Most families (72.5%) didn't follow safety rules well, especially around wearing helmets, using seatbelts, and avoiding choking foods, mostly because they thought some rules were unnecessary or didn't know enough about them.
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For the sustainable advancement of industrial expansion that is environmentally conscious, harmful dyes must be removed from wastewater. Untreated effluents containing colors have the potential to harm the ecosystem and pose major health risks to people, animals, and aquatic life. Here, we have fabricated Ni or Fe modified with BaTiO materials and effectively utilized them for Reactive Red 120 (RR 120) dye degradation under UV-A light.

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Background And Aims: Differentiation of nonobstructive dilatation (NOD) from ureteropelvic junction obstruction (UPJO) is a challenge in children with antenatally detected hydronephrosis. The aim of this study is to compare the utility of urinary biomarkers: carbohydrate antigen (CA 19-9), neutrophil gelatinase-associated lipocalin (NGAL), and kidney injury molecule (KIM) in diagnosing UPJO.

Methods: A prospective study was conducted after obtaining ethical clearance between 2021 and 2022.

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Graphene-based nanocomposites are developing as a new class of materials with several uses. The varied weight percentages of rGO on AgS catalysts were synthesized using a simple hydrothermal process and employed for the decomposition of anionic dye naphthol green B (NGB) under solar light. The reduced graphene oxide-based silver sulfide (rGO/AgS) nanoparticles were then examined using XRD, SEM, EDS, HR-TEM, XPS, UV-DRS, and PL analysis.

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In recent years, researchers have been actively investigating metal oxide-based materials with narrow bandgaps due to their potential applications toward wastewater treatment and oxygen evolution reactions (OER). In this study, we successfully synthesized g-CN (GCN), FeO and FeO/g-CN (FGCN) using thermal polymerization and hydrothermal methods. We characterized the physicochemical and structural properties of these materials through various analytical techniques including XRD, FT-IR, UV-DRS, XPS, FE-SEM, and HR-TEM analyses, confirming the effective construction of the FGCN composite catalyst.

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Background: The world is currently facing a growing concern regarding freshwater scarcity, which has arisen as a result of a complex interplay of various factors. Renewable energy-powered water desalination is a feasible solution to address freshwater scarcity.

Methods: This study presents a comprehensive investigation of the performance of a conventional solar still (CSS) and its modified versions, such as a still with copper plates, a still with PCM and a still with PCM and 3 wt% CuO nanoparticles blend.

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There is evidence that the orphan nuclear receptor 4A1 (NR4A1, Nur77) is overexpressed in exhausted CD8 + T cells and regulates PD-L1 in tumors. This study investigated the effects of potent bis-indole-derived NR4A1 antagonists on reversing T-cell exhaustion and downregulating PD-L1 in colon tumors/cells. NR4A1 antagonists inhibited colon tumor growth and downregulated expression of PD-L1 in mouse colon MC-38-derived tumors and cells.

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Compositional and structural elucidation of the materials is important to know their properties, chemical stability, and electro-photoactivity. The heterojunction electrocatalyst and photocatalyst activity could open a new window for solving the most urgent environmental and energy problems. Here, for the first time, we have designed and fabricated BiO/bismuth titanates modified with MOF-InS/CdInS materials by a stepwise process.

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In this study, we utilized calcination and simple impregnation methods to successfully fabricate bare g-CN (GCN) and x% Ag/g-CN (x% AgGCN) composite photocatalysts with various weight percentages (x = 1, 3, 5, and 7 wt.%). The synthesized bare and composite photocatalysts were analyzed to illustrate their phase formation, functional group, morphology, and optical properties utilizing XRD, FT-IR, UV-Vis DRS, PL, FE-SEM, and the EDS.

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Conjugated bile acids (BA) are significantly elevated in several liver pathologies and in the metastatic lymph node (LN). However, the effects of BAs on pathological lymphangiogenesis remains unknown. The current study explores the effects of BAs on lymphangiogenesis.

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Bacillus altitudinis FD48 is a multifunctional plant growth-promoting bacterium isolated from the phylloplane of rice and survives at --10 bars of osmotic potential (--1.0 MPa). It also serves as an ideal PGPM against drought stress by triggering antioxidant defense mechanisms in rice.

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Water electrolysis encounters a challenging problem in designing a highly efficient, long durable, non-noble metal-free electrocatalyst for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Here, in our work, a two-step hydrothermal reaction was performed to construct a hierarchal NiFe-layer double hydroxide (LDH)/CuS over copper foam for the overall water splitting reaction. While employed the same as an anode material, the designed heterostructure electrode NiFe-LDH/CuS/Cu exhibits excellent OER performance and it demands 249 mV overpotential to reach a current density of 50 mA cm with a lower Tafel slope value of 81.

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The poor kinetic background with the four-electron transfer of the oxygen evolution reaction (OER) was eradicated using a nickel-based catalyst, which was identified as an alternative to noble-metal catalysts. Here, we report the simple formation of an earth-abundant nickel oxyhydroxide (NiOOH) electrocatalyst for efficient OER in an alkaline medium. Electroless material preparation, namely, the direct modification of a gas diffusion layer (GDL) with a nickel salt, was studied, and the layered oxyhydroxide phase was found to influence the rate of the OER.

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Article Synopsis
  • - The study investigates a new bimetallic zeolite imidazolate framework (ZIF) made of cobalt and manganese to enhance electrocatalytic oxygen evolution reactions (OER) through electrospinning.
  • - The resulting nanofibers exhibited a reduced overpotential of 302 mV at 10 mA/cm² in alkaline conditions, with a Tafel slope of 125 mV/dec and a charge-transfer resistance of 4 Ω, indicating efficient kinetics in the OER process.
  • - It was found that manganese acts as the primary active center in the ZIF-67 nanofibers, while the presence of cobalt affects the Jahn-Teller distortion and overall performance, supported by
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Chronic nonhealing heel ulcerations have been established as an independent risk factor for major amputation, with poor rates of limb salvage success. Partial calcanectomy is a controversial limb salvage procedure reserved for patients with these heel ulcerations. We conducted a retrospective cohort study reviewing 39 limbs that underwent a partial calcanectomy from 2012 to 2018 to evaluate the proportion of patients healed, time to healing, ulcer recurrence, and postoperative functional level compared to the preoperative state.

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Novel KTO/BiOCl nanostructured photocatalysts with various weight proportions were synthesized using a simple hydrothermal process. The as-prepared nanostructured composite catalysts were characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, UV-vis diffused reflectance spectroscopy, Raman spectroscopy, field emission scanning electron microscopy, transmission electron microscopy with high resolution, X-ray photoelectron spectroscopy, and photoluminescence (PL). The photocatalytic activity of prepared catalysts was examined using Rhodamine B (RhB) and Congo Red (CR) as the aimed pollutants.

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The development of efficient electrocatalysts for the water splitting process and understanding their fundamental catalytic mechanisms are highly essential to achieving high performance in energy conversion technologies. Herein, we have synthesised spinel nickel ferrite nanofibers (NiFeO-NFs) an electrospinning (ES) method followed by a carbonization process. The resultant fiber was subjected to electrocatalytic water splitting reactions in alkaline medium.

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Bisphenol A (BPA) is a renowned plasticizer, and a key component of various plastics, resins, and food packaging materials. However, BPA have been identified as an endocrine disruption compound and cause severe consequences such as infertility, diabetic, obesity, carcinoma, and possess high risk of exposure in aquatic ecosystem. To this, we crafted an ultrasensitive electrochemical sensor based on the manganese sulfide nanoparticles (MnS NPs) catalyzed electrochemical oxidation of BPA, and its eventual application in rapid screening of BPA contamination.

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Internal Ni-vacancy-enriched spherical AuNi nanoalloys (AuNi-T) have been prepared via a noble electrochemical etching method. AuNi-T showed the highest oxygen evolution reaction (OER) activity compared to bare AuNi, and it demands only 239 mV overpotential, which was 134 mV lesser than the overpotential required by commercial RuO at 10 mA cm current density in a 1 M KOH solution (pH = 14). The calculated turnover frequency (TOF) value for AuNi-T (0.

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