Biopreservative technologies of food: an alternative to chemical preservation and recent developments

Food Science and Biotechnology - Despite centuries of developing strategies to prevent food-associated illnesses, food safety remains a significant concern, even with multiple technological...     

Fuzzy logic and differential evolution‐based hybrid system for gesture recognition using Kinect sensor

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.     

Biofabrication of silver nanoparticles using bacteria from mangrove swamp

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     

Development of engineered probiotics with tailored functional properties and their application in food science

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...     

A systematic review on selection characterization and implementation of probiotics in human health

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...