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Hurdle technology for fish preservation

Aquaculture and Fisheries 2020年第2期5卷 65-71页

作者： Theofania Tsironi Dimitra Houhoula Petros Taoukis Agricultural University of Athens Department of Food Science and Human NutritionLaboratory of Food Process EngineeringGreece Department of food Science and Technology Faculty of Food SciencesUniversity of West AtticaAthensGreece National Technical University of Athens School of Chemical EngineeringLaboratory of Food Chemistry and TechnologyGreece

Fresh fish is a highly perishable product due to the chemical composition of fish flesh and the high microbial load on fish *** natural microflora that is more adopted to low temperatures results also in lower thermal bacterial shock from natural temperature to the preservation temperature *** development of new fish processing(*** hydrostatic pressure,osmotic dehydration,high-intensity pulsed light)and packaging(*** atmospheres,active and intelligent packaging)methods or novel combinations of existing technologies is sought by the industry in the pursuit of producing alternative products,achieving shelf life extension,and management and reducing food *** 2014,processed fish was among the most active new product *** lack of dissemination of validated laboratory results for the seafood industry is one of the major issues preventing the uptake of minimal and nonthermal processing for fresh ***,it has been reported that some bacteria become more resistant under stress(*** lactobacilli).At the same time,the application of some processing methods(*** processing)may affect significantly the nutritional and sensory profile of the target food *** application of several“soft hurdles”may reduce the rate of fish deterioration and spoilage caused by microbial *** objective of this article is to review the preservative effect of alternative hurdles on fish quality and shelf life,focusing on recent,combined applications.

关键词： Hurdles Fish Quality Safety Kinetic modelling Shelf life

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Anti-fatigue activity and mechanism of crocetin loaded nanoliposome in acute exercise-treated mice

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food Science and Human Wellness 2024年第6期13卷 3361-3370页

作者： Jian Nan Jinglei Li Haishan Wu Haoran Cheng Hyun Jin Park Qingsheng Zhao Liu Yang School of food and biological engineering Hefei University of TechnologyHefei 230009China engineering Research Center of bio-process Ministry of EducationHefei University of TechnologyHefei 230009China School of Life Sciences and biotechnology Korea UniversitySeoul 02841South of Korea National Key Laboratory of biochemical engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Crocetin displays strong antioxidant,anti-inflammatory and anti-depression activity which is promising to relieve symptoms of *** a carotenoid,crocetin is difficult to dissolve in water and highly unstable against many environmental *** is used to encapsulate crocetin to improve its water *** the present study,the antifatigue activities and potential mechanism of crocetin loaded nanoliposome(CLN)was extensively *** potential antifatigue pathway of CLN was ***,impact of CLN on the gut microbiota structure was examined which contributes to its antifatigue *** significantly increases exhaustive swimming time of fatigue mice,decreases the blood contents of lactic,blood urea nitrogen(BUN)and malondialdehyde(MDA).At the same time,CLN improves the activity of glutathione peroxidase(GSH-Px)and succinate dehydrogenase(SDH)enzyme,attenuates the oxidant stress in *** activates the adenosine monophosphate-activated kinase(AMPK)/peroxisome proliferator-activated receptor gamma coactivator-1α(PGC-1α)signaling pathway of fatigue mice,increases the mRNA expression of ATP *** also increases mRNA expression of mitochondrial transcription factor A(TFAM)which promotes mitochondrial ***,CLN ameliorates the gut microbiota structure by increasing the abundance of genus such as Lactobacillus in fatigue *** summary,CLN exerts strong anti-fatigue properties by decreasing the oxidant stress and the contents of harmful metabolites,augmenting the production of ATP,and potentially ameliorating the gut microbiota structure.

关键词： Crocetin Nanoliposome Fatigue AMPK/PGC-1αpathway Gut microbiota

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Gold nanoparticle-decorated MoSe_(2) nanosheets as highly effective peroxidase-like nanozymes for total antioxidant capacity assay

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Nano Research 2023年第5期16卷 7180-7186页

作者： Chengyi Hong Lingling Chen Jiayi Huang Yunling Shen Hongfen Yang Zhiyong Huang Ren Cai Weihong Tan College of Ocean food and biological engineering Fujian Provincial Key Laboratory of Food Microbiology and Enzyme EngineeringJimei UniversityXiamen 361021China Molecular Science and biomedicine Laboratory State Key Laboratory for Chemo/Bio-Sensing and ChemometricsCollege of Chemistry and Chemical EngineeringCollege of Biology College of Material Science and EngineeringCollaborative Research Center of Molecular Engineering for TheranosticsHunan UniversityChangsha 410082China University of Texas at Austin AustinTX 78712USA

A visual colorimetric detection strategy is reported for total antioxidant capacity(TAC)assay by using 3,3',5,5'-tetramethylbenzidine(TMB)oxidation as chromogenic substrate based on gold nanoparticle-decorated MoSe_(2) nanosheets(Au@MoSe_(2)).Au@MoSe_(2) nanostructures exhibit high peroxidase-like activity and can catalyze H_(2)O_(2)to oxidize *** on inhibition effect of ascorbic acid(AA)on TMB oxidation,a facile and sensitive colorimetric method was developed for AA *** optimal conditions,the proposed method showed a sensitivity for AA in a concentration range from 2 to 120μM and limit of detection was 0.41μ***,the method was employed for TAC assay in actual samples,including commercial beverages and vitamin C *** work represents a model in nanostructure design and will lead to further development of TAC assay in evaluation of antioxidant food quality.

关键词： nanozymes peroxidase mimics Au@MoSe_(2)nanostructures total antioxidant capacity assay

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Changes in endogenous hormone levels and redox status during enhanced adventitious rooting by rare earth element neodymium of Dendrobium densiflorum shoot cuttings

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Journal of Rare Earths 2008年第6期26卷 869-874页

作者：罗建平张竞成王瑛 School of biotechnology and food engineering Hefei University of Technology

The effects of neodymium nitrate （Nd^3＋） on the adventitious rooting of Dendrobium densiflorum shoot cuttings were studied. The addition of Nd^3＋（5 μmol/L） to culture medium significantly increased rooting frequency. Histological investigation showed that Nd^3＋ did not change the process of root initiation. Nd^3＋ did not influence total endogenous cytokinin levels, but significantly increased the level of endogenous indole-3-acetic acid （IAA） in the base of shoot cuttings. Compared to the control, the ratio of IAA/cytokinins was very high in the Nd^3＋ treatment. These results suggested that the enhanced rooting frequency may be related to the increase in endogenous IAA level in Nd^3＋ treatment. Analysis of enzyme activities showed that the enhanced accumulation of the endogenous IAA by Nd^3＋ should not be attributed to inhibition of IAA decomposition by IAA oxidase or promotion of cytokinin decomposition by cytokinin oxidase. Besides, Nd^3＋ increased the ratio of reduced glutathione （GSH） and oxidized glutathione （GSSG） in the process of adventitious rooting while the ratio of ascorbate （ASC） to dehydroascorbate （DHA） was not affected.

关键词： Dendrobium densiflorum neodymium nitrate adventitious rooting indole-3-acetic acid cytokinins rare earths

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Preparation of mixed rare earths modified chitosan for fluoride adsorption

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Journal of Rare Earths 2013年第8期31卷 817-822页

作者：梁鹏张艺汪东风徐莹罗斓 College of food Science and engineering Ocean University of China

This paper described the fluoride removal from water using a new adsorbent namely mixed rare earths modified chitosan （CR）. Mixed rare earths mainly contained La followed by Ce which was analyzed by inductively coupled plasma mass spectrometry （ICP-MS）. La（III）-modifled chitosan （CL） was also prepared as control. For the batch technique, the effects of various parameters such as contact time, pH, adsorbent dose, initial fluoride concentration and co-ions on fluoride adsorption were studied. Fourier trans- form infrared spectroscopy （FTIR） and X-ray diffraction （XRD） were used to characterize adsorbents. It was observed that the fluo- ride adsorption capacity of CR （3.72 mgF-/g） was higher than CL （3.16 mgF-/g） at 2 h. The presence of co-ions such as bicarbonate and carbonate greatly affected the fluoride adsorption from water. Characterization experiments indicated the successful chelation between mixed rare earths and chitosan. The possible fluoride adsorption mechanism of CR was explained by a chemical reaction.

关键词： fluoride adsorption mixed rare earths chitosan La(III) adsorbent

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The flow behavior of powder stearin-based methyl ester sulfonates and the effect of glidant

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Particuology 2023年第9期80卷 148-156页

作者： Zulina Abd Maurad Luqman Chuah Abdullah Mohd Shamsul Anuar Nor Nadiah Abdul Karim Shah Zainab Idris Malaysian Palm Oil Board 6Persiaran InstitusiBandar Baru Bangi43000SelangorMalaysia Department of Chemical and Environmental engineering Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia Department of process and food Technology Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia

The preparation and behavior of powder stearin-based methyl ester sulfonates(MES)with the addition of builder as a glidant agent was *** is an anionic surfactant and its performance is equivalent to petroleum-based linear alkylbenzene sulfonates(LAS),the workhorses of the detergent *** the same time,zeolites or soda ash were the alternative builders for non-phosphate-based *** behavior of powder MES properties was measured in terms of morphology,particle size,cohesion,caking,and *** that,these palm stearin-based MES of carbon chain 16–18 with ratios of 98:2,80:20,and 60:40 in flakes were ground using a high shear mixer by 23,000 rpm to produce powder *** the particle size of MES powder can reduce the powder's cohesion,caking,and *** addition of zeolite or soda ash as a glidant in powdered MES can improve the caking *** high stearic in MES greatly influenced getting fine particle powders and required more glidant *** powder MES with excellent powder characteristics can perform well as a bio-based cleaning product.

关键词： Methyl ester sulfonates Caking Compaction Cohesion Glidant

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Diffusion Characteristics in Microcapsules

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Chinese Journal of Chemical engineering 1998年第2期6卷 26-33页

作者：姚善泾赵万纪 College of Chemical engineering Zhejiang University Department of food engineering Dong-Seo University

An equation of diffusion for microcapsules（hollow sphere）was developed,employing the mathematicalmodel for the diffusion characteristics of solid *** the proposed equation,a combination diffusion coeffi-cient was introduced as a substitute for the diffusion coefficient in the solid sphere mathematical model and ex-pressed as a function of the diffusion coefficient inside solution of hollow sphere,as well as in the polymer *** this modified model,the diffusion coefficients of glucose in NaCS（sodium cellulose sulfate）-PDADMAC（Poly-diallyl-dimethyl-ammonium chloride）membrane and in Ca-alginate gel membrane were *** diffusion coefficient in NaCS-PDADMAC membrane was found to be 2.12×10-11m2·s-1and thatin Ca-alginate membrane 2.62×10-10m2·s-1.

关键词： diffusion coefficient glucose NaSC-PDADMAC membrane Ca-alginate membrane microcapsule hollow sphere immobilization

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Preparation of Activated Carbon from Durian Rind with Difference Activations and Its Optimization

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Journal of Renewable Materials 2021年第2期9卷 311-324页

作者： Pongsert Sriprom Warawut Krusong Pornsawan Assawasaengrat Program of food process engineering Faculty of Agro-IndustryKing Mongkut’s Institute of Technology Ladkrabang10520BangkokThailand Program of Fermentation in food industry Faculty of Agro-IndustryKing Mongkut’s Institute of Technology Ladkrabang10520BangkokThailand Department of Chemical engineering Faculty of EngineeringKing Mongkut’s Institute of Technology Ladkrabang10520BangkokThailand

Durian rind wastes are an important raw material for activated carbon production due to their renewable sources and low-cost *** efficiency of increasing surface area and the quantity of oxygen groups on the surface of activated carbon were studied for the preparation of activated *** preparation of activated carbon has been studied with the different methods as follows:activation by acid,activation by base,hydrothermal and activation by acid,and hydrothermal and activation by *** results showed that hydrothermal and activation by acid had high iodine number which was chosen to determine the optimum condition for activated carbon *** optimum condition for preparation of durian rind activated carbon was studied by Box-Behnken ***/water ratio,solid/acid ratio and temperature were chosen as the important parameters for achieving the optimum reaction *** reaction products were analyzed by iodine *** on the results,the optimum condition for preparation of durian rind activated carbon was predicted using *** maximum iodine number of 626.47 mg/g was expected at the optimum condition:solid/water ratio(1:175,g/mL),solid/acid ratio(1:23,g/mL)and temperature(500℃).The preparation of durian rind activated carbon at the optimal condition was carried;the percentages of iodine number achieved(666.73±6 mg/g)were close to the maximum predicted value(666.73 mg/g),thus verifying the *** the optimum condition,the functional group on surface of durian rind activated carbon was characterized by *** result showed that the oxygen content on surface was increased in the form of carbonyl and sulfonyl group.

关键词： Durian rind activated carbon hydrothermal iodine number

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Bacterial community in response to packaging conditions in farmed gilthead seabream

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Aquaculture and Fisheries 2023年第4期8卷 410-421页

作者： Apollon Thomas Spyros J.Konteles Sotiris Ouzounis Spyros Papatheodorou Aliki Tsakni Dimitra Houhoula Theofania Tsironi Department of food Science and Technology Faculty of Food SciencesUniversity of West AtticaAthens11521Greece Medical Image and Signal processing Laboratory Department of Biomedical EngineeringUniversity of West AtticaAthens11521Greece Laboratory of food process engineering Department of Food Science and Human NutritionAgricultural University of AthensAthens11855Greece

The objective of this study was to evaluate the effect of modified atmosphere packaging(MAP)on fish skin,gills and intestines bacterial *** gilthead seabream was packed aerobically or under modified atmospheres(60%CO_(2),30%N_(2),10%O_(2))and stored isothermally at 0℃.Next Generation Sequencing(NGS)analysis was applied for the characterization of fish microbiome on fish skin,gills,and intestines initially(time of packaging,1 day after harvesting)and after 10 days of isothermal storage at 0℃.NGS results indicated statistically significant differences in families’richness and diversity in the tested fish tissues between aerobic and MAP packaging during storage at 0℃.The most persistent bacteria were Proteobacteria for both packaging *** fish skin microbiota,the initially prevailing families were Comamonadaceae,Enterobacteriaceae and Moraxellaceae while in the intestines Comamonadaceae,Anaplasmataceae,Bacillaceae and Enterobacteriaceae were the dominant *** the end of storage period,the fish microbiota was dominated by psychotropic and psychrophilic families(Pseudoalteromonadaceae,Psychromonadaceae,and Shewanellaceae),while families such as Comamonadaceae were persistent under MAP *** 8 days of fish storage at 0℃,МАРsamples exhibited higher sensory scorings than the respective aerobically stored fish,indicating better retention of fish freshness and fish quality attributes under *** on the results of the study,MAP modified significantly the microbiological status and extended the shelf life of *** was a powerful tool that provided a more complete assessment compared to a culture-based analysis.

关键词： Fish Preservation Next generation sequencing Modified atmosphere packaging Microbiome

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Purification and biochemical characterization of manganesecontaining superoxide dismutase from deep-sea thermophile Geobacillus sp. EPT3

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Acta Oceanologica Sinica 2014年第12期33卷 163-169页

作者： ZHU Yanbing LI Hebin NI Hui LIU Jingwen XIAO Anfeng CAI Huinong College of food and biological engineering Jimei University Fujian Provincial Key Laboratory of food Microbiology and Enzyme engineering Research Center of food Microbiology and Enzyme engineering Technology of Fujian Province Xiamen Medical College

Thermostable SOD is a promising enzyme in biotechnological applications. In the present study, ***3 was isolated from a deep-sea hydrothermal field in the East Pacific. A thermo-stable superoxide dismutase （SOD） from this strain was purified to homogeneity by steps of fractional am-monium sulfate precipitation, DEAE-Sepharose chromatography, and Phenyl-Sepharose chromatography. SOD was purified 13.4 fold to homogeneity with a specific activity of 3 354 U/mg and 11.1% recovery. SOD fromGeobacillussp. EPT3 was of the Mn-SOD type, judged by the insensitivity of the enzyme to both KCN and H2O2. SOD was determined to be a homodimer with monomeric molecular mass of 26.0 kDa. It had high thermostability at 50＆#176;C and 60＆#176;C. At tested conditions,SOD was relatively stable in the presence of some inhibitors and denaturants, such asβ-mercaptoethanol （β-ME）, dithiothreitol （DTT）, phenylmethylsulfonyl fluoride （PMSF）, urea, and guanidine ***. EPT3 SOD showed striking stability across a wide pH range from 5.0 to 11.0. It could withstand denaturants of extremely acidic and alkaline conditions, which makes it useful in the industrial applications.

关键词： Geobacillus sp. superoxide dismutase thermostability purification

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