Sea bass(Lateolabrax maculatus)is one of the important seafood in China.Its shelf-life under refrigerated storage exponentially deteriorate due to the growth of spoilage microorganisms,protein degradation and lipid ox...Sea bass(Lateolabrax maculatus)is one of the important seafood in China.Its shelf-life under refrigerated storage exponentially deteriorate due to the growth of spoilage microorganisms,protein degradation and lipid oxidation.In this study,4 coating materials namely,konjac glucomannan-whey protein isolate(KGM-WPI)film,chitosan-sweet potato starch(CHI-SPS)film,chitosan-bamboo fungus(CHI-BF)film,and chitosan-boehmite alumina(CHI-BAH)have been explored to enhance the shelf life of sea bass during 8 days of refrigerated storage.Overall,CHI-BF was observed to be best in retaining hardness,gumminess and maintaining total volatile basic nitrogen value.Whereas CHI-SPS was found to retain chewiness and maintain lower values for drip loss and peroxide value.CHI-BAH coating was observed to maintain the lower values for pH and EC values of sea bass under refrigerated storage.However,the least increase in total viable count and minimum change in b^(*)value was observed in the case of sea bass coated with KGM-WPI.The current research fi ndings provide a new practical storage method for the entire fresh fish.The fresh fish can be coated with different coating materials and store on the ice at 4℃without packaging during retailing.These film coated whole fresh fish retains its microbial and sensory quality.展开更多
Redundant seed sap of Dillenia indica has been cited to possess pharmaceutical potential, but literature pertaining to its role as bioactive delivery system in food processing domain is very scanty. In this study, D. ...Redundant seed sap of Dillenia indica has been cited to possess pharmaceutical potential, but literature pertaining to its role as bioactive delivery system in food processing domain is very scanty. In this study, D. indica mucilage-based beads loaded with vitamin E analogous, α-tocopherol acetate were developed and analyzed. Scanning Electron Microscopic images confirmed the entrapment of drug within the mucilage-alginate carrier in a core-shell arrangement. To understand the impact of mucilage-ladened fabricated shell on the active payload from degradation and to draw a contrast in characterization, comparative evaluation of the highest drug loaded sample (S5 with loading efficiency (LE) of ∼63% and bearing equal concentration of mucilage-alginate = 1:1 w/w as wall material) against the least loaded one (S1 with LE of ∼24% and possessing the highest mucilage-alginate ratio of 5:1 w/w as encapsulant) was done. Composite formation among the functional groups of mucilage and alginate were noted in FTIR spectra. Hybrid mucilage-alginate matrix of S5 exhibited higher resistance to enzymatic hydrolysis, better stability of the loaded drug in gastro-intestinal phases and thermal treatments than S1. By the end of intestinal digestion, radical scavenging activity of the digesta from S5 was 36.33% higher than that of S1. After being exposed to pasteurization and sterilization, the individual quantity of α-tocopherol acetate retained by S5 were respectively 13.54% and 33.78% higher than those found in S1. Thermal degradation kinetics data corroborated these findings. Thus, facile synthesis of hybrid carrier system from D. indica mucilage can open up ample opportunities for this fruit waste.展开更多
In this paper,we present a novel,reliable and sensitive electrochemical sensor for the determination of paracetamol based on hollow carbon Co3O4 nanosheets/reduced graphene oxide composite(Co3O4/r-GO).The Co3O4/r-GO w...In this paper,we present a novel,reliable and sensitive electrochemical sensor for the determination of paracetamol based on hollow carbon Co3O4 nanosheets/reduced graphene oxide composite(Co3O4/r-GO).The Co3O4/r-GO was prepared via a rapid one-step microwave solvothermal process.Some series of techniques that included scanning electron microscopy,X-ray diffraction and Raman were carried out to characterize the morphology and structure of as-prepared materials.Most importantly,the developed electrochemical sensor exhibited a wide linear range of 0.05 to 900.0μM and a low detection limit of 14.0 nM(S/N=3)by using differential pulse voltammetry.Furthermore,the selectivity,repeatability,stability and practical applicability were further studied with satisfactory results.展开更多
基金supported by two research grants(R202007 and R202107)from BNU-HKBU United International College,China.
文摘Sea bass(Lateolabrax maculatus)is one of the important seafood in China.Its shelf-life under refrigerated storage exponentially deteriorate due to the growth of spoilage microorganisms,protein degradation and lipid oxidation.In this study,4 coating materials namely,konjac glucomannan-whey protein isolate(KGM-WPI)film,chitosan-sweet potato starch(CHI-SPS)film,chitosan-bamboo fungus(CHI-BF)film,and chitosan-boehmite alumina(CHI-BAH)have been explored to enhance the shelf life of sea bass during 8 days of refrigerated storage.Overall,CHI-BF was observed to be best in retaining hardness,gumminess and maintaining total volatile basic nitrogen value.Whereas CHI-SPS was found to retain chewiness and maintain lower values for drip loss and peroxide value.CHI-BAH coating was observed to maintain the lower values for pH and EC values of sea bass under refrigerated storage.However,the least increase in total viable count and minimum change in b^(*)value was observed in the case of sea bass coated with KGM-WPI.The current research fi ndings provide a new practical storage method for the entire fresh fish.The fresh fish can be coated with different coating materials and store on the ice at 4℃without packaging during retailing.These film coated whole fresh fish retains its microbial and sensory quality.
基金supported by Department of Biotechnology,Ministry of Science and Technology,Government of India,under the DBT Twinning project(File no.BT/PR16789/NER/95/290/2015 dated March 14,2017)The authors would like to acknowledge the funding for facilitating the investigation.
文摘Redundant seed sap of Dillenia indica has been cited to possess pharmaceutical potential, but literature pertaining to its role as bioactive delivery system in food processing domain is very scanty. In this study, D. indica mucilage-based beads loaded with vitamin E analogous, α-tocopherol acetate were developed and analyzed. Scanning Electron Microscopic images confirmed the entrapment of drug within the mucilage-alginate carrier in a core-shell arrangement. To understand the impact of mucilage-ladened fabricated shell on the active payload from degradation and to draw a contrast in characterization, comparative evaluation of the highest drug loaded sample (S5 with loading efficiency (LE) of ∼63% and bearing equal concentration of mucilage-alginate = 1:1 w/w as wall material) against the least loaded one (S1 with LE of ∼24% and possessing the highest mucilage-alginate ratio of 5:1 w/w as encapsulant) was done. Composite formation among the functional groups of mucilage and alginate were noted in FTIR spectra. Hybrid mucilage-alginate matrix of S5 exhibited higher resistance to enzymatic hydrolysis, better stability of the loaded drug in gastro-intestinal phases and thermal treatments than S1. By the end of intestinal digestion, radical scavenging activity of the digesta from S5 was 36.33% higher than that of S1. After being exposed to pasteurization and sterilization, the individual quantity of α-tocopherol acetate retained by S5 were respectively 13.54% and 33.78% higher than those found in S1. Thermal degradation kinetics data corroborated these findings. Thus, facile synthesis of hybrid carrier system from D. indica mucilage can open up ample opportunities for this fruit waste.
基金supported by the Education Bureau of the Fujian province (No. JAT160302) projectsthe Natural Science Foundation of Zhejiang province (No. LQ17C200002)the Talents’ Start-up Fund of Gannan Medical University (No. QD201825) projects。
文摘In this paper,we present a novel,reliable and sensitive electrochemical sensor for the determination of paracetamol based on hollow carbon Co3O4 nanosheets/reduced graphene oxide composite(Co3O4/r-GO).The Co3O4/r-GO was prepared via a rapid one-step microwave solvothermal process.Some series of techniques that included scanning electron microscopy,X-ray diffraction and Raman were carried out to characterize the morphology and structure of as-prepared materials.Most importantly,the developed electrochemical sensor exhibited a wide linear range of 0.05 to 900.0μM and a low detection limit of 14.0 nM(S/N=3)by using differential pulse voltammetry.Furthermore,the selectivity,repeatability,stability and practical applicability were further studied with satisfactory results.
