Article
Chemistry, Applied
M. R. El-Aassar, Omar M. Ibrahim, Moustafa M. G. Fouda, Hala Fakhry, Jamaan Ajarem, Saleh N. Maodaa, Ahmed A. Allam, Elsayed E. Hafez
Summary: The wound dressing made of chitosan, gelatin, polyvinyl pyrmlidone, and embedded silver nanoparticles showed strong antibacterial activity against pathogenic bacteria and reduced the expression of antibiotic resistance genes. This cost-effective membrane has a promising application in treating severe diabetic and burn wound infections.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Andrea Ronavari, Peter Belteky, Eszter Boka, Dalma Zakupszky, Nora Igaz, Bettina Szerencses, Ilona Pfeiffer, Zoltan Konya, Monika Kiricsi
Summary: The biological properties of silver nanoparticles are influenced by their aggregation behavior, which in turn is affected by various factors such as pH, ionic strength, and biomolecules in biorelevant conditions. Colloidal stability plays a crucial role in maintaining the desired bioactivity of the nanoparticles.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Toxicology
Marija Curlin, Rinea Barbir, Sanja Dabelic, Marija Ljubojevic, Walter Goessler, Vedran Micek, Irena Zuntar, Mirela Pavic, Lucija Bozicevic, Ivan Pavicic, Ivana Vinkovic Vrcek
Summary: This study revealed sex-related differences in the toxicity effects of AgNPs in Wistar rats after oral 28 days repeated exposure.
PARTICLE AND FIBRE TOXICOLOGY
(2021)
Article
Chemistry, Analytical
Deyuan Yang, Ting Zhou, Yifeng Tu, Jilin Yan
Summary: A method for detecting silver ions with ultra-high sensitivity using copper nanoclusters and persulfate was established, with a detection limit of 1.2 pM. The method's selectivity and applicability were confirmed through practical water sample analyses.
Article
Polymer Science
Shuaijian Huang, Shuai Yang, Yuli Chen, Zhen Yang, Lu Deng, Yuanyuan Wu, Taojun Zhang, Ruokun Feng, Minfeng Zeng
Summary: Novel N-containing porous carbon supported Pd heterogeneous catalysts were prepared by carbonization of different blended polymers. The microstructure of the catalysts could be tailored by the nature of the blended polymers. The catalyst derived from GEL/CS/PdCl2 blend showed larger specific surface area, better dispersion of Pd-0/PdO nanoparticles, and higher Pd and N contents. It exhibited excellent catalytic performance in the Heck coupling reaction of aromatic halides and alkenes.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Satoshi Horikoshi, Seiya Sawada, Nick Serpone
Summary: This article explores the use of a novel microwave-induced in-liquid-plasma (MILP) method to gel water-soluble polymers without the need for cross-linking agents or initiators. The study demonstrates that this new method can lead to faster and more efficient gel formation, with resulting gels exhibiting different viscosity characteristics compared to those formed by conventional methods.
Article
Biochemistry & Molecular Biology
Yu Du, Qizhen Zhang, Manli Yu, Mingming Yin, Fuliang Chen
Summary: The ability of sodium alginate-gelatin-polyvinyl pyrrolidone composite microspheres to mitigate Pb stress was evaluated in this study. Microspheres effectively attenuated the toxic effects of Pb on cucumber seedlings, promoting cucumber growth and improving leaf peroxidase activity, chlorophyll content, and malondialdehyde content. They also improved soil physicochemical properties and enzyme activity, as well as increased available Pb concentration in the short term.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Anurag Mehta, J. P. Pandey, Gautam Sen
Summary: The study aimed at creating a novel flocculant without polyacrylamide, showing efficient behavior in water and wastewater treatment, mineral ore beneficiation, and nanopollutant suppression. The synthesis of a new cationic graft copolymer was characterized using various methods, with an investigation into the effects of reaction parameters on grafting percentage. The applicability of these grafted polymers as flocculants for treating municipal sewage waste water, mineral ore beneficiation, and suppressing nanopollutants like MWCNTs from water systems was also explored.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Chemistry, Physical
Sirui He, Jia Liu, Shu He, An Liu, Wei Shao
Summary: In this study, a double crosslinking strategy was used to fabricate novel PGA sponges. The morphology and chemical composition of the sponges were characterized, and their antibacterial activity was evaluated. The results showed that the PGA sponges exhibited excellent antibacterial performance due to the release of silver sulfadiazine, and the release of sulfadiazine was diffusion controlled. These prepared PGA sponges showed improved mechanical properties and excellent antibacterial effects.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
Kai Li, Maiqi Liu, Tao Liu, Xiaoshuai Han, Dazhi Wang, Fangyuan Zhang, Mingliang Li, Xiaoying Wang, Chuanhe Dong, Hairong Chen, Aibing Yu
Summary: A novel sandwich-like composite 3D model integrating deposited gelatin film and printed scaffold has been developed for 3D cartilage cell culture. The model consists of three layers and utilizes a combination of electrospray and electrohydrodynamic jet printing techniques. The composite model shows promising results in facilitating adhesion and ingrowth of cartilage cells.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Electrochemistry
Shijia Li, Liping Qin, Lijun Li, Hao Cheng, Guozhao Fang, Qi Zhu
Summary: Aqueous zinc-ion rechargeable batteries are potential candidates for large-scale energy storage due to their high safety, acceptable energy density, and low cost. However, the slow reaction kinetics and poor reversibility of Zn2+ insertion/extraction due to strong electrostatic interaction between divalent Zn2+ and the host lattice have been a challenge. In this study, vanadium-based compound composites were synthesized to improve the electrochemical performance of the batteries, showing good long-term cycle life.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Polymer Science
Tridib Kumar Sinha, Jin Hwan Lim, Harshada R. Chothe, Jung Gi Kim, Taehyun Nam, Taekyung Lee, Jeong Seok Oh
Summary: Titanium alloys are attracting significant attention for the development of low-cost and efficient biomedical implants using additive manufacturing or 3D printing. This study examines the use of a biocompatible amorphous polymer, PVP, as a binder to stabilize titanium alloy powders. The PVP-bound alloy powders showed stability and maintained a similar composition to the experimental formula. Thermal debinding at 1000 degrees C resulted in better removal of carbon content.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Horia M. Nizam El-Din, Doaa M. Ibraheim, Abdel Gawad M. Rabie
Summary: Nanocomposite hydrogels were prepared by gamma-radiation copolymerization of poly (vinyl pyrrolidone) (PVP)/sodium alginate (AG) in the presence of silver nanoparticles (Ag NPs). The effect of irradiation dose and Ag NPs content on the gel content and swelling characters of PVP/AG/Ag NPs copolymers was investigated. In addition, the structure-property behavior of the copolymers was characterized by IR spectroscopy, thermogravimetric analysis (TGA) and x-ray diffraction (XRD). The drug uptake-release characters of PVP/AG/silver NPs copolymers, taking Prednisolone as a model drug, were studied. The study showed that the appropriate dose of gamma irradiation to achieve homogeneous nanocomposites hydrogel films and the highest swelling in water was 30 kGy, regardless of composition. The introduction of Ag NPs up to 5 wt % improved the physical properties and enhanced the drug uptake-release characters.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Biochemistry & Molecular Biology
Zimkhitha B. Nqakala, Nicole R. S. Sibuyi, Adewale O. Fadaka, Mervin Meyer, Martin O. Onani, Abram M. Madiehe
Summary: Silver nanoparticles (AgNPs) have shown promise in wound healing due to their broad spectrum antimicrobial properties, low toxicity, efficacy at low concentrations, and lack of skin discoloration. They can be combined with other healing-promoting materials to provide optimal healing outcomes.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Zhichun Cui, Jianzhong Li, Zhiying Zhang, Wenhu Yang, Donghai Qiu
Summary: Polyvinyl pyrrolidone was used as a green additive in zirconium-based conversion treatment on aluminum alloy substrate. The addition of polyvinyl pyrrolidone improved the corrosion resistance of the conversion coating by increasing the density of Na3AlF6 crystal and enhancing the adhesion between the conversion coating and the electrophoretic coating. The conversion coating was mainly composed of metal oxide, metal fluoride, and polyvinyl pyrrolidone as confirmed by various analytical techniques.
Article
Engineering, Electrical & Electronic
K. K Bindu, S. Rajbala, Girish Kumar, Anil K. Singh
Summary: This paper proposes a technique using directly coupled stacked patches to increase impedance bandwidth and reduce cross-polarization. By employing metallic shorting posts between the metallic patches, the stacked configurations achieve a bandwidth of 25.8% and a gain of 8.8 dBi with low cross-polarization levels. A symmetrically direct-coupled stacked design further suppresses cross-polar components, resulting in a bandwidth of 26.1% and a gain of 9.3 dBi.
IETE JOURNAL OF RESEARCH
(2023)
Review
Food Science & Technology
Avtar Singh, Ajay Mittal, Soottawat Benjakul
Summary: This article provides insights into the applications of chitosan and its derivatives in the food industry, specifically for enhancing shelf-life and antimicrobial activity.
FOOD REVIEWS INTERNATIONAL
(2023)
Article
Food Science & Technology
Ajay Mittal, Avtar Singh, Hui Hong, Soottawat Benjakul
Summary: Chitooligosaccharides (COS) prepared from shrimp shell chitosan using different concentrations of H2O2 or AsA/H2O2 redox pair were characterized. COS-RP produced by AsA/H2O2 redox pair showed higher antioxidant and antimicrobial activities compared to COS-HP, with lower degree of polymerisation and average molecular weight.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Horticulture
Sandhya Thapa, Kalyan Barman, Anil K. Singh
Summary: The study found that postharvest putrescine (PUT) treatment has significant effects on delaying senescence and maintaining quality of guava fruits. Among the different doses of PUT treatment, 1.0 mM was the most effective in reducing weight loss and decay of the fruits.
Article
Chemistry, Applied
Ajay Mittal, Avtar Singh, Soottawat Benjakul
Summary: The inhibitory effects of chitooligosaccharide-epigallocatechin gallate (COS-EGCG) conjugate on alpha-amylase were studied and found to be significant. The conjugate could reduce starch digestibility and could be used as a food additive with low glycemic index.
Article
Food Science & Technology
Avtar Singh, Kartik Sharma, Pornpot Nuthong, Soottawat Benjakul
Summary: In this study, the emulsifying properties of psyllium husk powder at various concentrations in natural actomyosin extracted from threadfin bream mince were investigated. The addition of psyllium husk powder at 1.25 g/100 mL and 2.50 g/100 mL resulted in increased emulsion activity and stability indexes. Furthermore, the gel properties and consumer acceptability of fish tofu with different levels of psyllium husk powder were examined.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Ajay Mittal, Avtar Singh, Hui Hong, Soottawat Benjakul
Summary: The aim of this study was to determine the optimum condition for preparing chitooligosaccharide-catechin conjugate (COS-CAT) liposomes using different stabilising agents. COS-CAT liposomes were prepared using soy phosphatidylcholine (SPC) and either glycerol or cholesterol, and their encapsulation efficiency, loading capacity, physicochemical characteristics, FTIR spectra, thermal stability, and structure were assessed. The results showed that COS-CAT loaded liposome stabilised by cholesterol (COS-CAT-CHO) exhibited higher stability, with the highest encapsulation efficiency and loading capacity, and the lowest zeta potential, polydispersity index, and releasing efficiency.
JOURNAL OF MICROENCAPSULATION
(2023)
Article
Food Science & Technology
Natchaphol Buamard, Avtar Singh, Bin Zhang, Hui Hong, Prabjeet Singh, Soottawat Benjakul
Summary: The quality of surimi gel can be improved by using protein cross-linkers, especially those from plant extracts like Duea ching fruit. The fruit extract, rich in phenolic compounds and calcium, can activate transglutaminase and enhance the gel's properties. Different media for the extraction of Duea ching were studied and its application in sardine surimi gel was investigated.
Article
Biotechnology & Applied Microbiology
Khurshid Ahmed Baloch, Avtar Singh, Khamtorn Pudtikajorn, Soottawat Benjakul
Summary: Enrichment of n-3 polyunsaturated fatty acids (PUFA) in skipjack tuna eyeballs oil (STEO) was investigated using lipases from different yeast strains. Among all lipases tested, Candida rugosa extracellular lipase (Cr-ECL) showed promising enrichment of EPA and DHA in STEO. RSM was used to optimize reaction conditions and resulted in a significant increase in DHA and EPA concentration in STEO. The established hydrolysis protocol successfully converted fish oil from tuna waste to valuable fish oil enriched with n-3 fatty acids.
BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY
(2023)
Article
Food Science & Technology
Avtar Singh, Saumya Mehta, Umesh Patil, Pornpot Nuthong, Soottawat Benjakul
Summary: The effects of adding hyperoside (HyS) at various levels (0%-4%; w/w) on the textural, rheological, structural, and sensory properties of threadfin bream surimi were investigated. The addition of 1% and 2% HyS resulted in surimi gel with the highest breaking force and deformation. HyS also improved the water-holding capacity and increased hardness, springiness, gumminess, and chewiness of the gel. The addition of HyS enhanced the connections between surimi proteins and improved the gel network.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Food Science & Technology
Avtar Singh, Umesh Patil, Ajay Mittal, Prabjeet Singh, Anuj Tyagi, Soottawat Benjakul
Summary: The gelling behaviors of partially purified myofibrillar proteins (PPMP) extracted from Indian mackerel (IM) and threadfin bream (TB) were compared at different heating temperatures. The results demonstrated that IM-MP exhibited lower turbidity, surface hydrophobicity, and disulfide bond content compared to TB-MP. The amino acid profile showed no significant difference between the two species, except for lysine and glutamine. Structural analysis confirmed these differences, and the transmission analysis revealed lower aggregation and crosslinking ability of IM-MP. Therefore, the gelling behavior of IM-MP was poorer compared to TB-MP.
JOURNAL OF FOOD SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Ajay Mittal, Avtar Singh, Bin Zhang, Qiancheng Zhao, Soottawat Benjakul
Summary: The inhibitory effects of chitooligosaccharide (CHOS) conjugates, including CHOS-catechin (CHOS-CAT), CHOS-epigallocatechin gallate (CHOS-EGCG), and CHOS-gallic acid (CHOS-GAL), on Pacific white shrimp cephalothorax polyphenoloxidase (PPO) were studied. CHOS-CAT showed the strongest inhibitory activity against PPO and exhibited mixed-type inhibition. Molecular docking analysis revealed that CHOS-CAT interacts with various amino acid residues near the active site of PPO. Therefore, CHOS-CAT could serve as an anti-melanosis agent to prevent discoloration in crustaceans.
Article
Fisheries
Wattana Temdee, Avtar Singh, Hui Hong, Bin Zhang, Ahmet Faruk Yesilsu, Soottawat Benjakul
Summary: The effects of epigallocatechin gallate (EGCG) at 200 or 400 ppm on the quality changes of cooked Harpiosquillid mantis shrimp (Harpiosquilla raphidea) (CHMS) meat subjected to varying freeze-thaw cycles (F-T-C; 0, 1, 3, and 5) were studied. With increasing F-T-C, the CHMS meat deteriorated to a higher extent, indicated by increased exudate loss, tougher texture, and higher microbial counts. The addition of EGCG could dose-dependently retard these changes, as well as prevent microbial growth and lipid oxidation. The alterations in disulfide bond content and surface hydrophobicity of CHMS added with EGCG were more pronounced with higher EGCG concentration.
TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Review
Food Science & Technology
Ajay Mittal, Avtar Singh, Jirayu Buatong, Jirakrit Saetang, Soottawat Benjakul
Summary: Chitooligosaccharide (CHOS), a depolymerized chitosan, has various applications as alternative additives or bioactive compounds in food and biomedical fields. Derivatives of CHOS with enhanced bioactivities, such as anti-inflammatory, anti-obesity, neuroprotective, and anti-cancer effects, have been prepared and characterized. These CHOS derivatives also exhibit improved antibacterial and antioxidant activities, which are beneficial for shelf-life extension and food safety.
Proceedings Paper
Materials Science, Multidisciplinary
Surendra Poonia, A. K. Singh, Dilip Jain
Summary: In the water-stressed Thar desert of Rajasthan, a concentrating solar thermal desalination device was developed to address the limited surface water resources and brackish groundwater. The use of paraffin as a phase change material increased the system productivity and the economic analysis showed cost-efficiency. This device can effectively desalinate water for rural areas in the Thar desert.
MATERIALS TODAY-PROCEEDINGS
(2022)