Publications by authors named "Tarun Kumar Dua"

Naga chilli (Capsicum chinense Jacq.) have garnered significant attention due to the plant's possible health benefits and variety of phytochemical components. Utilizing cutting-edge analytical techniques such as gas chromatography-mass spectrometry (GC-MS) and high-performance thin layer chromatography (HPTLC) in conjunction with bioautography, this study conducts a thorough phytochemical profiling and biological activity assessment of the Naga chilli plant.

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  • The study investigates the potential of taro stolon polysaccharide (TSP) as a binder in tablet formulations, highlighting its extraction and characterization through advanced techniques like FTIR and SEM.
  • Tablets made with different concentrations of TSP were compared to traditional binders like gum acacia and PVP K-30, demonstrating effective drug release and optimal hardness with low friability, even at minimal TSP levels.
  • Findings indicate that TSP has promising qualities for use in pharmaceuticals, with significant hydration kinetics and a unique release mechanism that supports its role in enhancing tablet formulation.
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The present investigation was aimed to fabricate and optimize extended-release beads of diclofenac sodium based on an ion-cross-linked matrix of pectin (PTN) and taro (Colocasia esculenta) stolon polysaccharide (TSP) with 2 full factorial design. Total polysaccharide concentration (TPC), polysaccharide ratio (PR), and cross-linker concentration ([CaCl]) were taken as independent factors with two levels of each. Initially, TSP was extracted, purified, and characterized.

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Aims: To elucidate the impact of 10-(6-plastoquinonyl) decyltriphenylphosphonium (SkQ1) as an anti-colitogenic agent for maintenance of colon epithelial tract in ulcerated mice through recovery of mitochondrial dysfunction and mitochondrial stress by virtue of its free radical scavenging properties.

Main Methods: DSS induced ulcerated BALB/c mice were treated with SkQ1 for 14 days @ 30 nmol/kg/body wt./day/mice.

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  • * Mesoporous silica nanoparticles (MSiNPs) and zinc-loaded MSiNPs (Zn-MSiNPs) were tested on wheat seedlings under salinity stress and showed improved growth, chlorophyll content, and nutrient levels.
  • * Treatments with Zn-MSiNPs notably enhanced the K/Na ratio, demonstrating their effectiveness in mitigating salinity stress and highlighting their potential as a smart delivery system for micronutrients.
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A considerable amount of fruit waste is being produced every day worldwide. The green synthesis of metal nanoparticles from fruit peel waste can be an innovative, cost-effective, and eco-friendly alternative to traditional methods. Copper nanoparticles (CuNPs) were synthesized by a green method using the pineapple peels extract (PLX) and copper sulfate pentahydrate.

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The current research focused on the green synthesis of silver nanoparticles (AgNPs) using Duabanga grandiflora leaf extract. The green synthesis of AgNPs was confirmed by the surface plasmon resonance band at 453 nm in a UV-Visible analysis. The formulated AgNPs had a diameter of around 99.

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  • * The study confirmed the successful modification of SiNPs into TSiNPs using techniques like FTIR and SEM, and examined their size and shape, finding TSiNPs to be larger but more effective in releasing silica and trehalose over time.
  • * Experiments with saline-stressed lentil seedlings showed that both SiNPs and TSiNPs boosted growth and improved ionic balance and osmolyte status, with TSiNPs providing significantly greater stress
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This study describes an effective and eco-friendly approach to the synthesis of zinc oxide nanoparticles (ZnONPs) utilizing papaya fruit peel extract (PPE). The structural evaluation and morphological features of synthesized ZnONPs were examined using various physicochemical analyses. The formulated ZnONPs were spherical to hexagonal in shape with ⁓ 170 nm in diameter.

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The present study aimed to evaluate Cassia fistula seed galactomannan (CFSG) as a tablet-binder in the formulation of a monolithic matrix tablet using diclofenac sodium as a model drug. Initially, CFSG was extracted and purified from the seeds of the Cassia fistula tree and then screened for phytochemicals. Native CFSG was characterized with polysaccharide content determination, monosaccharide composition analysis, elemental analysis, FTIR, solid-state C NMR, molecular weight, zeta potential, DSC, TGA-DTA, XRD, viscosity, pH and surface tension, rheology, SEM and acute oral toxicity study.

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  • Silver nanoparticles (Ag NPs) were synthesized using Osbeckia stellata leaves, highlighting the benefits of an eco-friendly and cost-effective approach through green synthesis.
  • Characterization techniques such as UV-Vis spectroscopy and SEM showed that the Ag NPs have a spherical shape and are in the nanometer size range, confirming their effective biosynthesis.
  • The study found that these Ag NPs demonstrate strong antioxidant, antidiabetic, cytotoxic, and antimicrobial properties, indicating their potential applications in biomedical and pharmacological fields.
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Black rice ( L.) is a rich source of phenolics and anthocyanins. It was aimed to investigate the effect of different extraction methods such as conventional solvent extraction, ultrasound-assisted extraction (UAE), and microwave-assisted extraction (MAE) on antioxidant activity and phenolic profiling of black rice free, esterified, and bound phenolics fractions.

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Tea is the most popular daily drink consumed globally, with a high concentration of caffeine and polyphenols. In this study, the effects of ultrasonic-assisted extraction and quantification of caffeine and polyphenols from green tea were investigated and optimized using 2 -full factorial design and high-performance thin-layer chromatography. Three parameters were optimized to maximize the concentration of caffeine and polyphenols extracted using ultrasound: crude drug-to-solvent ratio (1:10-1:5), temperature (20-40°C), and ultrasonication time (10-30 min).

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The green synthesis of metallic nanoparticles has tremendous impacts in various fields as found in recent years due to their low cost, easy and environmentally friendly synthesis. In this article, we report a simple and eco-friendly method for the synthesis of silver nanoparticles (AgNPs) using an aqueous () leaf extract as a bioreductant. Interestingly, Fourier transform infrared (FTIR) spectroscopy analysis established that the extract not only served as a bioreductant but also acted as a capping agent to stabilize the nanoparticles by functionalizing the surfaces.

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  • Different parts of tea were extracted using solvents of varying polarity to examine their phytochemical profiles and biological activities.
  • The study found that as the polarity of the solvents increased, the total phenolic and flavonoid contents also increased, with the most effective extracts coming from polar solvents like hydroalcohol.
  • Strong correlations were observed between the phytochemical contents and the biological activities, indicating that phenolic compounds in tea, especially from young leaves, are effective antioxidants, anti-inflammatory, and antidiabetic agents.
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  • α-Amylase inhibitors derived from natural sources like Asparagus racemosus show potential for developing new diabetes treatments, with improved methods for isolating bioactive compounds using advanced techniques like HPTLC combined with spectroscopy.
  • The study utilized different solvent extractions of the plant's aerial parts and performed assays to identify antioxidant activity and α-amylase inhibition, finding that the methanolic extract had the highest antioxidant effectiveness.
  • The research concluded that stigmasterol, identified through analytical methods, is likely responsible for the observed α-amylase inhibition, supporting A. racemosus's traditional medicinal use for diabetes management.
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Acetaminophen (APAP) is commonly prescribed as an antipyretic and analgesic agent in the practical field. Like every other drug(s), APAP also undergo metabolism by oxidation or conjugation by glucuronate and sulphate to form the toxic metabolite N-acetyl-p-benzoquinone imine (NAPQI). Moreover, the NAPQI is detoxified by conjugation with reduced glutathione (GSH).

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  • - The COVID-19 outbreak was declared a global health emergency on January 30, 2020, and a pandemic on March 11, 2020, highlighting the urgent need for protective measures, risk assessment, and treatment options.
  • - The highly contagious SARS-CoV-2 virus led to a surge in cases, especially among asymptomatic individuals, prompting worldwide lockdowns that severely impacted economies and industry.
  • - Ongoing research is focused on developing specific treatments for COVID-19, including antiviral therapies and vaccinations, with promising methods like virtual drug library screening being used to repurpose existing medications.
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