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Muthuvelu Kirupa Sankar Ethiraj Baranitharan Pramnik Shreyasi Raj N. Keerthish Venkataraman Swethaa Rajendran Devi Sri Bharathi Priyadharshini Palanisamy Elakiya Narayanan Anusri Sathiya Vaidyanathan Vinoth Kumar Muthusamy Shanmugaprakash 《Food science and biotechnology》2023,32(10):1337-1350
Food Science and Biotechnology - Despite centuries of developing strategies to prevent food-associated illnesses, food safety remains a significant concern, even with multiple technological... 相似文献
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Pramanik Shreyasi Venkatraman Swethaa Vaidyanathan Vinoth Kumar 《Food science and biotechnology》2023,32(4):453-470
Food Science and Biotechnology - The potential health benefits of probiotics may not be cognized because of the substantial curtailment in their viability during food storage and passage through... 相似文献
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Shreyasi Chattopadhyay Sandipan Maiti Indranee Das Sourindra Mahanty Goutam De 《Advanced Materials Interfaces》2016,3(23)
The authors report a novel strategy to fabricate electrospun anatase TiO2–rGO composite nanofibers with 3D cubic ordered mesoporosity. Such synthesis route not only ensures molecular level composite formation between rGO and TiO2 but also retains the rGO content and orders mesostructure after calcination of the nascent fiber at an optimum condition that only removes the surfactant and polymer. Transmission electron microscopic and low angle X‐ray diffraction studies confirm the presence of ordered mesoporosity within the nanofibers. Raman and X‐ray photoelectron spectroscopy studies reveal the molecular level composite formation between rGO and TiO2 with chemical bonding. This composite nanofiber with high surface area (155 m2 g–1) is tested as an anode material in lithium‐ion batteries. Intrinsically formed TiO2–rGO composite structural features with channel like interconnected 3D order mesopores within 1D fibrous morphology help in achieving 94% of the theoretical capacity (335 mAh g–1 for one electron transfer) at a current density of 16.75 mA g–1, the highest reported so far. It shows specific capacity of 212 and 168 mAh g–1 even at moderately high current densities of 335 and 838 mA g–1, respectively. Moreover, 85.3% of capacity retains after 500 continuous discharge/charge cycles at 335 mA g–1. 相似文献
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Pramanik Shreyasi Venkatraman Swethaa Karthik Pothiyappan Vaidyanathan Vinoth Kumar 《Food science and biotechnology》2023,32(4):423-440
Food Science and Biotechnology - Probiotics are live bacteria found in food that assist the body's defence mechanisms against pathogens by reconciling the gut microbiota. Probiotics are... 相似文献
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Shreyasi Nandy;T. V. Sreekumar;Shital Palaskar;Neha Mehra; 《Polymer Engineering and Science》2024,64(11):5411-5425
The polyester fabric was subjected to atmospheric plasma and impregnated with commercially available 3-hydroxyphenyl phosphinyl-propanoic acid (3HPP) as flame retarding agent by high-temperature high pressure (HTHP) dyeing method. Various concentrations of 3HPP in water, up to 4% w/v, were applied using the HTHP method. It was observed that the plasma treatment not only enhanced wettability and wicking but also facilitated increased pickup of 3HPP onto the polyester. The treatment exhibited a noteworthy enhancement in the limiting oxygen index (LOI), rising from 20.8% for the untreated control fabric to 30% for the fabric treated with plasma and a 4% 3HPP solution. Additionally, the application of 3HPP without plasma treatment did not yield significant improvements in flame-retardant (FR) properties. The combined treatment of plasma and 3HPP resulted in an LOI of 29% with a 2% 3HPP treatment, while at the same concentration without plasma treatment, the LOI value was 26.8%. The heightened LOI was primarily attributed to the presence of phosphorus, as confirmed by high-performance liquid chromatography and energy-dispersive X-ray spectroscopy. Additionally, the wash durability assessment of plasma-processed and 3HPP-treated samples demonstrated sustained flame retardancy, with an LOI of approximately 28% even after undergoing 20 wash cycles. Vertical flammability and cone calorimetry also confirm improved FR properties after treatment. Remarkably, the mechanical properties and surface morphology of the fabric remained unaltered following both plasma and chemical treatments. 相似文献
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The paper introduces a novel approach to gesture recognition aimed at physical disorder identification capable of handling variations in disorder expressions. The gestures are captured by Microsoft's Kinect sensor. The work is segmented into four main parts. The first stage describes a “relax” posture through four centroids depicting four portions of the skeletal structure. In the second stage, when the subject is showing symptoms of any one of the 16 physical disorders, then the skeletal structure distorts; the bilateral structure is lost, and concept of “centroid” computation does not seem relevant. Hence, in the second stage, “motion points” depicting shifted centroids for the distorted posture are computed by distance maximization with respect to the four corresponding centroids obtained for the relax posture. This process is carried out by adapting the weights assigned to each joint by differential evolution. In the third stage, eight features are figured out on the basis of Euclidean distances and angles among the motion points of the distorted gesture. In the final stage, gestures are recognized using an interval type‐2 fuzzy set‐based classifier with 91.37% accuracy. 相似文献
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Manish Sharma Parth Sarthi Nayak Shreyasi Asthana Dipankar Mahapatra Manoranjan Arakha Suman Jha 《IET nanobiotechnology / IET》2018,12(5):626
The last decade has observed a rapid advancement in utilising biological system towards bioremediation of metal ions in the form of respective metal nanostructures or microstructures. The process may also be adopted for respective metal nanoparticle biofabrication. Among different biological methods, bacteria‐mediated method is gaining great attention for nanoparticle fabrication due to their eco‐friendly and cost‐effective process. In the present study, silver nanoparticle (AgNP) was synthesised via continuous biofabrication using Aeromonas veronii, isolated from swamp wetland of Sunderban, West Bengal, India. The biofabricated AgNP was further purified to remove non‐conjugated biomolecules using size exclusion chromatography, and the purified AgNPs were characterised using UV–visible spectroscopy, X‐ray diffraction, field emission scanning electron microscopy and transmission electron microscopy (TEM). Additionally, the presence of proteins as capping and stabilising agents was confirmed by the amide‐I and amide‐II peaks in the spectra obtained using attenuated total reflection Fourier transform infrared spectroscopy. The size of biofabricated AgNP was 10–20 nm, as observed using TEM. Additionally, biofabricated AgNP shows significant antibacterial potential against E. coli and S. aureus. Hence, biofabricated AgNP using Aeromonas veronii, which found resistant to a significant concentration of Ag ion, showed enhanced antimicrobial activity compared to commercially available AgNP.Inspec keywords: silver, nanoparticles, microorganisms, nanofabrication, purification, chromatography, ultraviolet spectra, visible spectra, X‐ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, proteins, molecular biophysics, biochemistry, molecular configurations, attenuated total reflection, Fourier transform infrared spectra, particle size, antibacterial activity, biomedical materials, nanomedicineOther keywords: capping agents, stabilising agents, amide‐I peaks, amide‐II peaks, attenuated total reflection Fourier transform infrared spectroscopy, antibacterial potential, E. coli, S. aureus, Aeromonas veronii, antimicrobial activity, size 10 nm to 20 nm, Ag, proteins, TEM, transmission electron microscopy, field emission scanning electron microscopy, X‐ray diffraction, UV‐visible spectroscopy, size exclusion chromatography, nonconjugated biomolecules, purification, swamp wetland, Aeromonas veronii, cost‐effective process, eco‐friendly, bacteria‐mediated method, biological methods, metal nanoparticle biofabrication, microstructures, metal nanostructures, metal ions, bioremediation, biological system, mangrove swamp, bacteria, silver nanoparticles 相似文献
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