Research Progress On Detection Methods Of Food-Borne Bacteria Resistant Against Drugs,
2018
College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
Research Progress On Detection Methods Of Food-Borne Bacteria Resistant Against Drugs, Zhang Kexin, Li Zhonghai, Ren Jiali
Food and Machinery
The current commonly used drug sensitivity test method such as diffusion method, dilution method and Etest method, as well as new methods including molecular biology and electrochemical method were summarized in this article. We briefly analyzed the principles, characteristics and limitations of the above methods. Future development direction and research trend of food-borne bacterial susceptibility testing methods had also been presented, which provided a reference for the development of new antimicrobial susceptibility test method.
Research Progress In Monosaccharide Detection By High Performance Liquid Chromatography,
2018
Northwest Minzu University, Lanzhou, Gansu 730030, China
Research Progress In Monosaccharide Detection By High Performance Liquid Chromatography, Saimaiti Reziwanguli, Chen Shien, Gao Dandan, Wu Zhongyong, Che Minna, Li Mingsheng
Food and Machinery
High performance liquid chromatography (HPLC) is one of the most important factors in monosaccharide analysis due to its simple operation, and high efficiency and sensitivity. In this study, several commonly used methods were described, for the analysis of monosaccharides by high performance liquid chromatography, i.e., liquid chromatography differential refractive index detection, liquid chromatography evaporative light scattering detection, PMP pre-column derivatization detection, para-aminobenzoic acid pre-column derivatization, the o-aminobenzoic acid derivative method and post-column derivatization method. Moreover, the advantages and disadvantages of these methods were demonstrated, and the sensitivity, operation method, and accuracy were compared and analyzed among these methods.
Advances In Microbial Conversion And Utilization Of Distiller Grains,
2018
School of Animal Science and Technology, Northeast Agricultural University, Harbin,Heilongjiang 150030, China
Advances In Microbial Conversion And Utilization Of Distiller Grains, Gao Mingkun, Wen Guangyu, Qian Fang
Food and Machinery
The application of microbial conversion in the use of distiller grain is the by-products of the production of solid white liquor, which has become increasingly prominent. Themicrobial in detoxifying distiller grains, production of high added value feed and feed additive in recently years, especially the effect of it application in animal feed were reviewed. Moreover, a prospect of application of microbial technology in the transformation of distiller grains.
Analysis Of Themain Organic Acids And The Production Of Vinegar From Defective Fresh Jujube Fruits By Batch And Semi-Continuous Fermentation,
2018
College of Food and Bioengineering, Henan University of Science and Technology, Luoyang，Henan 471023, China;Henan Engineering Research Center of Food Material, Luoyang，Henan 471023, China;Luoyang Engineering and Technology Research Center of Microbial Fer
Analysis Of Themain Organic Acids And The Production Of Vinegar From Defective Fresh Jujube Fruits By Batch And Semi-Continuous Fermentation, Xiang Jinle, Guan Suixia, Ma Liping, Ren Guangyue, Yuan Yunxia, Kang Huaibin
Food and Machinery
In order to utilize defective fresh Jujube fruits, Jujube vinegar was explored by crushing, pulping, alcohol fermentation, batch and semi-continuous acetic fermentation. The fresh Jujube fruits were cleaned, washed, and then crushed and pulped with addition of water to 1.5 times. The Jujube pulp was inoculated Angel fruit wine yeast with inoculation quantity 0.1%. After fermentation 72 h at the room temperature, the alcohol concentration of Jujube wine could reach 8.07%Vol. Then Jujube wine was inoculated with the inoculum size of acetic acid bacteria 10%, and the first batch of acetic fermentation finished in 60 h. In the next acetic …
Optimization On Dry-Cured Process Of Sansui Plasma Duck Of Guizhou,
2018
Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, Guiyang, Guizhou 550025, China; College of Liquor Making and Food Engineering, Guizhou University, Guiyang, Guizhou 550025, China
Optimization On Dry-Cured Process Of Sansui Plasma Duck Of Guizhou, Gao Xiaohong, Wang Xiujun, Tian Duo
Food and Machinery
In order to improve the production technology system and the product quality. Using the Sansui duck as raw material, the effects of pre-cooking time, curing time, salt concentration and cooking wine concentration on the comprehensive quality of duck meat were studied, and the dry-cured process of Sansui plasma duck was optimize. The results showed that Sansui plasma duck optimum parameters of dry-cured process in were obtained: pre-cooking time 2.4 min, curing time 39.0 min, salt concentration 3.0% and cooking wine concentration of 2.9%. Under this condition, the duck meat has moisted surface, color goldenand uniform, special duck fragrance, and its …
The Differences Of Taste Characteristics Of Commercial Natural Mature Cheeses,
2018
Shanghai Engineering Research Center of Dairy Biotechnology, Shanghai 200436, China; Dairy Research Institute, Bright Dairy & Food Co., Ltd., State Key Laboratory of Dairy Biotechnology, Shanghai 200436, China
The Differences Of Taste Characteristics Of Commercial Natural Mature Cheeses, Wang Lei
Food and Machinery
The main taste components of eight typical natural mature cheeses were analyzed by gas chromatography-mass spectrometry and amino acid analyzer. The taste activity values and sensory evaluation were used to clarify the differences among the eight kinds of cheeses, so as to provide a theoretical basis for precise control of cheese flavor and market positioning. The results showed that in addition to Goat Cheese and Brie Cheese, free amino acids contributed to the taste of the other six type of cheeses. The common taste amino acids were valine and lysine. Cheeses were bitter and sweet. And blue Cheese had the …
Effects Of Oxygen Vectors On Microbial Production Of Avilamycin,
2018
School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255000, China; Key Laboratory of Technologies for Functional Agricultural Products in Universities of Shandong, Zibo, Shandong 255000, China
Effects Of Oxygen Vectors On Microbial Production Of Avilamycin, Zhang Mei, Song Yuanda, Liu Qing, Wang Youling, Wu Han
Food and Machinery
In order to improve oxygen delivery efficiency and dissolved oxygen levels for the production of avilamycin in the fermentation broth, the effects were studied, including the various oxygen carriers on the synthesis of avilamycin and the growth of Streptomyces viridochromogenes. The results showed that Tween-80 was the most effective vector to promote growth and the ability of Streptomyces viridochromogene to produce avilamycin.With the addition of 3 g/L tween at 8 h fermentation ,the biomass reached 11.82 g/L and the avilamycin titer increased to 340 mg/L, which was 20.63% and 21.42% higher than the control group. Result show that the oxygen …
Study On Extraction Processof Total Flavonoids In Dandelion By Using The Compound Enzymes And Their Antioxidant Activities,
2018
Northeast Forestry University College of Forestry, Harbin, Heilongjiang 150040, China
Study On Extraction Processof Total Flavonoids In Dandelion By Using The Compound Enzymes And Their Antioxidant Activities, Zhang Zhi, Liu Yang, Yin Wenzhe, Hua Hongling, Yu Henglin, Zhang Zhijun
Food and Machinery
The effects on the yield of total flavonoids were studied by reference enzyme dosage, pH value, ratio of material to liquid, ethanol concentration, enzymolysis temperature and time. A 4 factor with 3 horizontal response surface test optimization were conducted. The optimal extraction conditions of the total flavonoids of dandelion were as follows: 122 (g/mL), pH 4.5, 52% ethanol concentr-ation, the hydrolysis temperature was 51 ℃. Under these condi-tions, the yield of total flavonoids was 15.09 mg/g. The results of in vitro functional experiments showed that the total flavonoids extract of dandelion had strong antioxidant activity and scavenging ability against free …
Study On Isolation, Structure Characterization And Radical Scavenging Activity Of Cyanobacteria Polysaccharide,
2018
Key Laboratory of Carbohydrate Chemistry and Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu 214122, China
Study On Isolation, Structure Characterization And Radical Scavenging Activity Of Cyanobacteria Polysaccharide, Huang Yijia, Wu Jianrong, Zhu Li, Zhan Xiaobei
Food and Machinery
An effective method to extract Cyanobacteria polysaccha-ride was established in this study and a high yield of polysaccharide (25.1%) was achieved by optimizing extraction condition (hot water with ultrasonic treatment). After purification, a main purified polysaccharide (CB-2-1) with molecular weight of 8.4 kDa was collected and the compositions included rhamnose, arabinose, xylose, mannose, glucose and galactose, with mole percentages of 0.51%, 13.35%, 18.21%, 51.38%, 4.87% and 11.67%, respectively. The results of NMR showed that the CB-2-1 component of cyanobacteria polysaccharide was mainly α-type glycosidic bond. Moreover, the purified CB-2-1 polysaccharide had great anti-oxidant activities. The highest scavenging activities of DPPH …
Preparation Of Low Lactose Milk With High Hydrolysis Rate And Analysis Of Sugar,
2018
College of Chemistry and Biology Engineering, Changsha University of Science and Technology, Changsha, Hunan 410076, China; College of Food and Chemistry Engineering, Shaoyang University, Shaoyang, Hunan 422000, China
Preparation Of Low Lactose Milk With High Hydrolysis Rate And Analysis Of Sugar, Wu Taoying, Cheng Yunhui, Zhao Liangzhong, Ouyang Lin, Xu Zhou
Food and Machinery
To determine the optimum conditions for the production of low lactose milk by enzyme method, the hydrolysis process of low lactose milk was optimized by the response surface method, with the hydrolysis rate of lactose as an index. The results were as follows: the ratio of enzyme to substrate (\[E\]/\[S\]) was 1.50‰, and the hydrolysis was undertaken at 38.15 ℃ for 3.0 h. Under these conditions, the lactose hydrolysis rate of low lactose milk was 92.67%. Moreover,14.02% of the oligosaccharides were detected by HPLC detection, which showed β-galactosidase could hydrolysis lactose and turn glycosidic.
Study On The Characteristics Of Simulated Dough Of Starch From Different Sources,
2018
College of Food Science and Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
Study On The Characteristics Of Simulated Dough Of Starch From Different Sources, Lu Danni, Zhang Hui
Food and Machinery
In order to study the effect of different starch on dough, several different kinds of starch and gluten were mixed to form simulated dough. The characteristics of mixed powder gelatinization, rheological properties, simulated dough moisture distribution, microstructure and quality characteristics of prepared bread were analyzed, so as to explore the effect of different types of starch on dough. The results showed that the gelatinization temperature of simulated dough system decreased, the gelatinization viscosity of potato starch and legume starch was higher, and the hardness and chewiness of pea starch simulated dough system were higher. The storage modulus (G′) and loss …
Study On The Molecular Mechanism Of The Effects On Emulsifying Properties Of Pea Proteins,
2018
School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Study On The Molecular Mechanism Of The Effects On Emulsifying Properties Of Pea Proteins, Lu Juhui, Zhong Fang, Chen Maoshen
Food and Machinery
The emulsifying properties of pea proteins and the molecular mechanism that affected the emulsifying properties were investigated in this study. The pea protein powder was used to prepare emulsions using soy bean oil by homogenizing technique. The parameters of the emulsions were studied including the emulsifying property, stability, interfacial adsorption property and the competitive adsorption of components of pea proteins. The results indicated that when the protein concentration was within 1 to 30 mg/mL, with the increasing of concentration, the particle size of emulsions was decreasing, the emulsifying property and stability improved, and protein aggregates were losing the superiority in …
The Effect Of Complex Crosslinker On The Properties Of Potato Crosslinked Starch By Microwave,
2018
Department of Food and Chemical Engineering, Lushan College of Guangxi University of Science and Technology, Liuzhou, Guangxi 545616, China
The Effect Of Complex Crosslinker On The Properties Of Potato Crosslinked Starch By Microwave, Zhang Jiayan, Xiong Jianwen, Qin Zhanjun, Zhao Pin
Food and Machinery
The potato cross-linked starch was prepared by using microwave-assisted method equipment, combining the compound crosslinking agents, sodium trimetaphosphate and sodium tripolyphosphate. The physical and chemical properties of the crosslinked starch were measured and the effects of compound crosslinking agent and microwave-assisted method effect on the properties of potato starch were studied. The results showed that the content of combined phosphorus and resistant starch obtained by compound crosslinking agent and microwave-assisted method were high, and the swelling degree and the solubility were low, with the better thermal and the shear stabilities and the easier re-trogradation. The results of scanning electron microscopy …
Rna-Seq Analysis Of Improving Mechanism For Cardiac Hypertrophy Of A Propolis Product,
2018
College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; National United Engineering Laboratory of Natural Biologic
Rna-Seq Analysis Of Improving Mechanism For Cardiac Hypertrophy Of A Propolis Product, Sun Yanru, Han Mingfeng, Shen Zhenhuang, Wu Zhenhong, Miao Xiaoqing
Food and Machinery
To study the improving mechanism of a propolis product on cardiac hypertrophy, spontaneously hypertensive rats (SHRs) were picked as animal models.After continuous infusion of this propolis product for 35 d, left ventricular index were calculated and RNA-Seq was performed. Differentially expressed genes (DEGs) were screened with the following GO enrichment analysis and KEGG metabolic pathway analysis. Totally 1 297 DEGs (91 DEGs were up-regulated and 1 206 DEGs were down-regulated) were selected. Results of KEGG metabolic pathways showed that 410 DEGs were enriched into 182 KEGG pathways, among which the top three DEGs enrichment is closely related to insulin signal …
Changes In Volatile Compounds And Expression Pattern Of Genes Involved In Terpenoid Biosynthesis In Pulp Of Ponkan Fruit During Section-Drying,
2018
(College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Engineering Research Center of Regional Food, Chongqing 400715, China
Changes In Volatile Compounds And Expression Pattern Of Genes Involved In Terpenoid Biosynthesis In Pulp Of Ponkan Fruit During Section-Drying, Yao Shixiang, Cao Qi, Xie Jiao, Deng Lili, Zeng Kaifang
Food and Machinery
Both GC-MS and RNA-Seq were employed to investigate the changes in volatile compounds and expression pattern of genes involved in biosynthesis pathway of terpenoid in the pulp of Ponkan fruit during section-drying process. The results were as follows: ① 13 volatile components were identified from pulp of Ponkan fruit, among which seven components were terpenoid, accounting for more than 85% of the total volatile contents. ② The volatile constituents in pup were same between normal and disordered fruits. In fruits affected by section-drying, the content of total volatiles and terpenoid decreased to 32% and 22%, respectively, of normal fruits. A …
Effect Of Venturi Tube-Based Cavitation On Preparation Of Chitosan Microspheres And Loading Antibacterial Agent,
2018
School of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, Guangxi 545006, China; Guangxi Key Laboratory of Green Processing of Sugar Resources, Liuzhou, Guangxi 545006, China; Key Laboratory for Processing of Su
Effect Of Venturi Tube-Based Cavitation On Preparation Of Chitosan Microspheres And Loading Antibacterial Agent, Zhang Kunming, Lu Xiaoju, Huang Yongchun, Huang Chengdu, Yang Feng, Huang Qiong
Food and Machinery
In order to study the effect of venturi tube-based hydrodynamic cavitation on the ionic cross-linking preparation of chitosan microspheres and the encapsulation of methylisothiazolinone (MIT), which was used as a model antibacterial agent in this study. The effects of inlet pressure of venturi tube，cavitation time, chitosan concentration, mass ratio of chitosan and sodium tripolyphosphate (TPP), MIT concentration on the entrapment efficiency of chitosan microsphere were investigated, and the entrapment efficiency of microsphere prepared by venturi tube-based cavitation was compared with that prepared by conventional mechanical agitation. The results showed that the chitosan microspheres could be stably obtained by using venturi …
Isolation And Identification Of Microorganism Affecting Eating-Quality In Fermented Fresh Rice Noodle,
2018
School of Chemistry and Biology Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, China
Isolation And Identification Of Microorganism Affecting Eating-Quality In Fermented Fresh Rice Noodle, Chen Lanxuan, Yang Youwang, Zhou Hui, Tong Litao, Zhou Sumei, Yi Cuiping
Food and Machinery
Microorganism strains as the starter culture for the manufacture of fermented rice noodles were selected. A total of 41 yeasts and 60 lactic acid bacteria (LAB) were isolated from the traditional fermentation of rice noodles, and the enzymatic activities (catalase, β-glucosidase, lipase, α-amylase, proteolytic enzyme), growth under varied pH and temperatures, and acidification capability were characterized. Principal component analysis indicated that 11 isolates of yeast, and 19 isolates of LAB exhibited potential technological traits. After identification using internal transcribed spacer sequence for yeasts and 16S rRNA gene for LAB, the isolates were grouped into three yeast isolates and four LAB …
Effect Of The Processing Parameters Of Electric Cooker On The Palatability Of Cooked Japonica Rice,
2018
School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Effect Of The Processing Parameters Of Electric Cooker On The Palatability Of Cooked Japonica Rice, Yang Yajing, Xia Shuqin, Yu Jingyang, Zhang Xiaoming, Fang Zhen, Li Jing, Su Ying
Food and Machinery
In order to disclose the influence of processing parameters of electric cooker on the palatability of cooked japonica rice, the correlation between textureproperties, cooking characteristics and sensory quality was analyzed by partial least squares regression. The effect of processing parameters on the crucial physical and chemical indexes was also explored. Furthermore, the effect of the key processing parameters on the migration and distribution of water in the japonica rice kernel during the cooking process was investigated with the use of low field nuclear magnetic resonance. The results showed that the hardness and elasticity of texture properties and iodine blue value …
Hot Air Drying Characteristics And Mathematical Model Of Oat Potato Compound Noodles,
2018
College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, Henan 471023, China
Hot Air Drying Characteristics And Mathematical Model Of Oat Potato Compound Noodles, Li Yebei, Ren Guangyue, Qu Zhanping, Li Lulu, Duan Xu, Zhang Ledao
Food and Machinery
The hot air drying characteristics of oat potato noodles were investigated, and the compound noodles were prepared by using oat potato flour. The hot air drying characteristics of compound noodles were studied at different temperatures, air velocity and noodle thickness, and the mathematical model was established. The resulted show that the drying time will be shorter with the higher the drying temperature. Moreover, it was found that the bigger the air velocity was the smaller the noodles thickness was. Comparing with the air velocity, the temperature and the noodles thickness had more effects on the drying rate of the compound …
The Synergistic Antibacterial Effect Of Led Blue Light And Citric Acid Against Escherichia Coli,
2018
School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology, Wuxi, Jiangsu 214122, China
The Synergistic Antibacterial Effect Of Led Blue Light And Citric Acid Against Escherichia Coli, Yu Jianfeng, Xia Xiaolu, Cui Zhengwei, Chen Jian, Zhang Chuwei
Food and Machinery
In order to develop a novel antibacterial method of food, the influences of the illumination intensity of LED blue light, the mass concentration of citric acid and temperature on the antibacterial property of Escherichia coli O157:H7 in nutrient broth were studied. The results demonstrated that under low temperature (12 ℃), the effect of LED blue light on the antibacterial property of Escherichia coli O157:H7 was better than that under room temperature (25 ℃), and the antibacterial efficiency increased with the increase of illumination intensity. Under low temperature, the influence of citric acid on E. coli O157:H7 was weak, but under …
