Effects Of Drying Methods On Physiochemical Properties And Antioxidant Activities Of Polysaccharides From Roots Of Arctium Lappa L.,
2016
College of Science, Sichuan Agricultural University, Ya’an, Sichuan 625014, China
Effects Of Drying Methods On Physiochemical Properties And Antioxidant Activities Of Polysaccharides From Roots Of Arctium Lappa L., Yu Jun, Zhang Li, Li Yabo, Jia Chunhong
Food and Machinery
Using the roots of Arctium lappa L. as materials to extract polysaccharides from the roots of Arctium lappa L. The influences of different drying methods were studied, including hot air drying, vacuum drying and freeze drying, on the physiochemical properties and antioxidant activities of polysaccharides from roots of Arctium lappa L.. Hot air drying, vacuum drying and freeze drying methods polysaccharides from roots of Arctium lappa L. were all gray solid, non-starch polysaccharides and no polyphenols content. Freezing drying Arctium lappa polysaccharides had higher total sugar and protein. And the contents of total sugar and protein were (90.72±1.45)% and (2.41±0.17)%. …
Study On Microwave-Assisted Extraction And Antioxidation Of Polysaccharides From Water Chestnut,
2016
Collge of Chemistry and Bioengineering, Guilin University of Technology, Guilin, Guangxi 541004, China
Study On Microwave-Assisted Extraction And Antioxidation Of Polysaccharides From Water Chestnut, Zhang Huixiang, Yang Shijun, Zeng Jin
Food and Machinery
The water chestnut as raw material, the extraction conditions of polysaccharide were studied by single factor and orthogonal experiment, antioxidant activity on polysaccharide from water chestnut was detected, respectively. The results showed that with distilled water as extraction solvent, extracting process of polysaccharide from water chestnut had microwave power of 600 W, solid-liquid ratio of 1∶15, extracting time of 3 min, under these conditions, the extraction rate of polysaccharide could reach 8.12%, and the polysaccharide purity could up to 83.2%. The polysaccharide from water chestnut had strong reduction power and scavenging ability to hydroxyl radicals in the range of 0.01～0.10 …
Comparing Antioxidant Activity Of Pepper Seeds Oil In Vitro Produced By Different Process,
2016
National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Changsha, Hunan 410128, China
Comparing Antioxidant Activity Of Pepper Seeds Oil In Vitro Produced By Different Process, Liu An, Luo Song, Li Qiguang, Yang Xindi, Xu Dandan, Xiao Wenjun
Food and Machinery
The antioxidant activity in vitro experimental model method is adopted, with control of Vc and VE, a comparative study of supercritical CO2 extraction and petroleum ether extraction and supercritical CO2 extraction after degumming and bleaching of three kinds of process technology for preparation of pepper seed oil antioxidant activity.The results show that the reduction ability of pepper seed oil and the hydroxyl radical, superoxide anion free radicals and H2O2 scavenging rate from high to low process followed by supercritical fluid extraction after degumming and bleaching, supercritical fluid extraction, petroleum ether extraction, DPPH free …
Separation And Purification Geraniol-Beta-D-Glycosidase By Chemical Synthesis,
2016
College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
Separation And Purification Geraniol-Beta-D-Glycosidase By Chemical Synthesis, Cheng Dongwei, Yang Xihong, Xie Wancui, Gao Qian, Lei Sheng
Food and Machinery
In order to find an efficient and systematic way of producing and purifying geraniol glycosidase，an improved method of Koenigs-Knorr was gotten, which used the silicone to hold silver carbonate catalyst to improve the productivity and perfects the synthesis process, separating and purifying the crude sample by silica gel column chromatography(SGCC) and high performance liquid chromatography (HPLC) . The method of SGCC applies the thin plate chromatography to get the better flow matches which is the ethyl acetate and ethanol according to 50:1, 40:1, 30:1, but the HPLC selects water and acetonitrile which is to 45:55, each of the two flows …
Chitosan-Based Flocculation And Salt Induced Aqueous Two-Phase Extraction Of Procyanidins From Red Grape Seeds,
2016
College of Agriculture and Biotechnology, Hexi University, Zhangye, Gansu 734000, China; Key Laboratory of Hexi Corridor Resources Utilization of Gansu, Zhangye, Gansu 734000, China
Chitosan-Based Flocculation And Salt Induced Aqueous Two-Phase Extraction Of Procyanidins From Red Grape Seeds, Zhang Xifeng, He Qian, Zhang Bin, Wang Minghui, Luo Guanghong
Food and Machinery
According to the recovery rate of procyanidins, the purification process of procyanidins from red grape seeds by chitosan flocculation was optimized by orthogonal test．After procyanidins in the ethanol aqueous extract solution of red grape seeds was separated into two phases by salts, the partition characteristics of it in two phases were studied. Chitosan flocculation was investigated, and the results were as follows. The optimum flocculation was obtained using 2 mL of chitosan with 20 mL ethanol solution of procyanidins at 35 ℃ and pH 4. The recovery rate of procyanidins reached to 95.62%. Then, the salts inducing aqueous two-phase extraction …
Preperation Of Feruloylated Saccharides From Corn Straw By Enzymatic Hydrolysis,
2016
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu 214122, China; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu 214122
Preperation Of Feruloylated Saccharides From Corn Straw By Enzymatic Hydrolysis, You Mengzhu, Lu Jian, Cai Guolin
Food and Machinery
Multi-stage cyclone grinding can be used to change the physical structure of corn straw, which can be degraded easier by enzymes to release feruloylated saccharides. By the same enzymatic hydrolysis, the content of feruloylated saccharides released from multi-stage cyclone grinding corn straw increased by 3.34 fold than that without pretreatment. Commercial complex enzymes, such as Validase TRL, HSP 6000 BG, Rapidase Smart Clear, xylosidase and arabinfuranosidease were used to hydrolyze multi-stage cyclone grinding corn straw, and it showed that Validase TRL had the best effect, and the yield of feruloylated saccharides was 1.46 μmol/g, increased by 3.48 fold than that …
Technological Optimization Of The Preparation Of Corn Resistant Starch By Microwave-Enzymatic Method,
2016
College of Food Engineering, Jilin Agricultural Science and Technology College, Jilin, Jilin 132101, China
Technological Optimization Of The Preparation Of Corn Resistant Starch By Microwave-Enzymatic Method, Niu Chunyan, Tang Yuanfa
Food and Machinery
The corn starch was used to determine the optimum technological conditions of corn resistant starch by microwave-enzymatic method. The optimal conditions were got by orthogonal experiment analyses, and we found the content of resistant starch was highest and reached to 28.4%, when treated under the following conditions, i.e. 25% of Starch slurry mass fraction , 800 W of microwave power, 240 s of microwave heating time, and cooling storage for 20 h at 4 ℃. Our study might provide a new clue for the preparation of resistant starch and make benefit for the application for starch industry in the future.
Advances In Nrf2-Are-Mediated Flavonoids Against Oxidative Stress,
2016
College of Food Science and Technology, Hunan Agriculture University, Changsha, Hunan 410128, China
Advances In Nrf2-Are-Mediated Flavonoids Against Oxidative Stress, Li Tao, Deng Fangming, Qin Si, Wu Yanyang, Shan Yang, Li Qili
Food and Machinery
Oxidative stress has very close relationship with human health, and human organsviolated by oxidative stress is likely to cause a series of physical diseases，such as headache, muscle aches, arthritis, atherosclerosis, diabetes, heart disease, cancer and neurodegenerative problem. However the flavonoids which widely exist in fruits, vegetables and other plant foods have a very significant role in the fight against oxidative stress, this is largely because it can activate the Nrf2-ARE which is the critical defense signaling pathway and regulating many antioxidant gene expression. In this paper, introduced the activation of Nrf2-ARE signaling pathway, the related signaling pathways of regulating Nrf2-ARE …
Research Progress Of Open Food Refrigerated Display Cabinets,
2016
School of Energy and Power Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan 450002, China
Research Progress Of Open Food Refrigerated Display Cabinets, Wu Xuehong, Wang Chunxu, Li Weiping, Zhang Jun
Food and Machinery
Refrigerated display cabinets as the terminal device of the food cold chain logistics play an important role in ensuring the food quality and safety. In this paper a brief overview of recent progress is presented in the open food refrigerated display cabinets from the aspect of air curtain performance, the environment temperature and humidity, the structure optimization of the cabinet body, the problems of evaporator frosting and defrosting, the system energy saving and the application of phase change materials for cool storage, et al. Analyzes the related factors on velocity field and temperature field distribution of food refrigerated display cabinets, …
Progress On Cleaning And Packaging Of Postharvest Fresh Vegetables,
2016
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Progress On Cleaning And Packaging Of Postharvest Fresh Vegetables, Lei Hao, Xie Jing
Food and Machinery
For its rich nutrients vitamins and minerals, fresh vegetables have become one of the most important indispensable ingredients of daily life. Based on different cleaning and packaging methods, physical cleaning, chemical cleaning, film packaging, coating packaging, modified atmosphere packaging and vacuum packaging of fresh vegetables were introduced. The research direction of vegetables processing after harvest was forecasted, and mixing cleaning and comprehensive atmosphere package were proposed as the future research focuses.
Present Situation And Future Prospect Of Aerobic Solid-State Fermentation,
2016
College of Life Sciences, Inner Mongolia University, Huhhot, Inner Mongolia 010020, China
Present Situation And Future Prospect Of Aerobic Solid-State Fermentation, Liu Jingran, Li Guanhua
Food and Machinery
Aerobic solid-state fermentation, with a long history, has played a pivotal role in human society. In this paper the development history, the advantages and the application fields of aerobic solid-state fermentation were introduced. Moreover, the recent research achievements of solid state fermentation bio-reactor and other auxiliary technologies were summarized. In end of the paper, the future development of of aerobic solid-state was also prospected.
Establishment Of Real-Time Quantitative Pcr Assay For The Detection Of Enterobacter Sakazakii Based On Internal Amplification Control,
2016
The Technical Center of Hebei Entry-exit Inspection and Quarantine Bureau, Shijiazhuang, Hebei 050051, China
Establishment Of Real-Time Quantitative Pcr Assay For The Detection Of Enterobacter Sakazakii Based On Internal Amplification Control, Wang Jinfeng, Wang Jianchang, Hu Lianxia, Sun Xiaoxia, Chen Zhimin, Jiang Yanfen
Food and Machinery
Based on ompA gene sequence of Enterobacter sakazakii, the specific primer and probe were designed. An internal amplification control (IAC) was added and used to monitor the performance of reaction system. The assay could be used reliably to detect E. sakazakii genome DNA with the sensitivity of 1 pg. The detection limit for E. sakazakii was 1×104 CFU when used the DNA extracted by water boiling as the template. With the use of ompA, the detection limit can reach 103 copies. Through the standard curves of ompA, the quantification was linear between Ct and template copy number (R …
Analysis Bacterial Diversity In Drinking Water Of O3-Bac Water Treatment Technology By Illumina Miseq Sequencing,
2016
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China; School of Food Science and Technology, Harbin University, Harbin, Heilongjiang 150080, China
Analysis Bacterial Diversity In Drinking Water Of O3-Bac Water Treatment Technology By Illumina Miseq Sequencing, Ge Yingliang, Yu Shuili, Shi Wenxin, Yin Qi, Weng Weipeng
Food and Machinery
Enriched the drinking water by using tangential flow ultrafiltration (TFF), extracted the genomic DNA, amplified 16S rDNA V4+V5 region, a total of 45 093 sequences and the average length of the 395.65 bp sequence were got. After high throughput sequencing bioinformatics analysis including annotation, evaluation, species composition analysis, β- diversity analysis, species difference analysis, RDA analysis etc., the bacterial diversity and the abundance in drinking water was got. In the result, the bacterial diversity is uncertainty and randomness in drinking water, the water quality parameters of turbidity and residual chlorine are biggest influence on the bacterial diversity in drinking water, …
Discussion On Detection Method Of Potassium Permanganate Consumption In Hygienic Standard Of Epoxy Phenolic Coatings For Inner Wall Of Food Cans,
2016
Hebei Chengde LoLo Co., Ltd., Chengde, Hebei 067000, China
Discussion On Detection Method Of Potassium Permanganate Consumption In Hygienic Standard Of Epoxy Phenolic Coatings For Inner Wall Of Food Cans, Zuo Aidong, Gao Yuli, Zhao Shunge, Du Jiangmei
Food and Machinery
The potassium permanganate consumption of the tin cans coated with epoxy phenolic coatings as the protective layer was detected according to the national standard of GB/T 5009.60-2003 method for analysis of hygienic standard of products of polyethylene, polystyrene and polypropyrene for food packaging. The method required accurate titer of potassium permanganate standard solution, and was not suitable for daily rapid detection. The test method adjusted the concentration of potassium permanganate solution and determined the value of f instead of the titration process of the standard solution. By the data analysis of two kinds of test conditions, the creditability and feasibility …
Analysis On Drying Box Exergy And Variable Air Velocity Drying Of Autumn Rice,
2016
Guangdong Agricultural Machinery Research Institute, Guangzhou, Guangdong 510630, China; Food Science College of South China Agricultural University, Guangzhou, Guangdong 510630, China
Analysis On Drying Box Exergy And Variable Air Velocity Drying Of Autumn Rice, Zhao Xihe, Long Chengshu, Zhang Jinjiang, Liu Qinghua, Gong Li
Food and Machinery
In order to solve the problem of temperature rise in heat pump drying rice in autumn. Two drying test scheme were been set, for the low temperature constant rate drying and variable wind speed drying. Both the total energy consumption and exergy analysis were been taken comparison of the drying process of rice. Experimental results show that the drying rate increases with wind speed and temperature go up in constant speed drying process. However, both the exergy efficiency and total energy consumption decrease with the increase of the wind speed. The total energy consumption of the variable wind speed drying …
Design And Performance Tests Of A New Portable Roaster,
2016
College of Mechanic Engineering and Communication, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China
Design And Performance Tests Of A New Portable Roaster, Lv Zhongming, Rouzi Amuti, Shi Yong, Ma Bin
Food and Machinery
Aiming at problems such as heavy environmental pollution, great losses in heart as well as inconvenient cleaning and carrying during the roasting process of current roasters, this thesis designs a kind of new portable roaster taking outdoor flat gas tank as heat source and combining with infrared flame burner and rotary roasting roaster. In the meanwhile, by using ANSYS software, the thesis builds a model to analyze the temperature distribution of the roaster and the meat. The simulated analysis shows that the overall temperature distribution of the roaster is reasonable and the heat preservation effect is good. At last, through …
Optimization Of Extraction Conditions Of Freshwater Snail Salt Soluble Protein And Its Processing Properties,
2016
College of Life Science, Hunan University of Arts and Science, Changde, Hunan 415000, China; Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Changde, Hunan 415000, China; Key Laboratory of Health Aquacul
Optimization Of Extraction Conditions Of Freshwater Snail Salt Soluble Protein And Its Processing Properties, Wang Bohua, Zhu Baohong, Yang Pinhong, Cao Zhen, Wang Tingyun, Chen Huimin
Food and Machinery
The resource of freshwater snail is very rich in China, but its processed products are not very much. Using salt soluble protein as a natural food additive in meat products can improve its quality. Extraction conditions were optimized using salt soluble protein yield, and determined the main processing properties such as emulsification capability, foaming capability and water-holding capability. The Results showed that freshwater snail salt soluble protein yield can reach 13.6％ when NaCl concentration was 0.7 mol/L, pH 8.0, extraction time and solid-liquid ratio of 1∶6 for 24 hours. The best emulsification ability and emulsification stability index were 27.67 m …
Fabrication And Characterization Of Polyglycerol Fatty Acid Ester/Biaxially Oriented Polypropylene Antifogging Film,
2016
College of Food Science, Shanghai Ocean University, Shanghai 201306, China
Fabrication And Characterization Of Polyglycerol Fatty Acid Ester/Biaxially Oriented Polypropylene Antifogging Film, Wei Lijuan, Yang Fuxin, Wu Jun, Xu Guangqian, Chen Jiyu, Wang Haili, Du Yunpeng
Food and Machinery
Objective The surfactant polyglycerol fatty acid ester (PGFE) was used for surface modification of biaxially oriented polypropylene film (BOPP) to perfect antifogging performance. Methods Used PGFE as an antifogging agent to prepared PGFE/BOPP antifogging film using a coating method. The present study was conducted to investigate the influence of different levels of PGFE on the antifogging performance, mechanical, optical, air and moisture permeability of BOPP film. Results Different levels of PGFE were coated on the film increased its tensile strength and haze, but reduced its light transmittance, oxygen permeability and water vapor permeability. The results showed that the PGFE/BOPP film …
Optimization Of Microwave Assisted Extraction Process Of Lignans In Cinnamomum Camphora Leaf,
2016
Central South University of Forestry and Technology, Changsha, Hunan 410004, China; Rice and By-products Processing National Engineering Laboratory, Changsha, Hunan 410004, China
Optimization Of Microwave Assisted Extraction Process Of Lignans In Cinnamomum Camphora Leaf, Zhou Haixu, Li Zhonghai, Zhan Ghui, Lai Yongjiao
Food and Machinery
An efficient microwave assisted extraction procedure for the lignans from the leaves of Cinnamomum camphora was investigated and optimized. Response surface methodology (RSM) based on a three-level four-factor Box Behnken Design (BBD) was employed to optimize the extraction conditions. The best extraction conditions were as follows: microwave time 5 min, ratio of material to ethanol 1∶26 (g/mL), ethanol concentration 80%, microwave temperature 60 ℃. Under the optimization conditions, the experimental yield of lignans was 42.69%, which was well matched with the predictive yield of 42.95%.
On Establishment Of The“Co-Governance”Mechanism For Food Safety With Chinese Characteristics——“The Fifth National Science And Technology And Public Policy Forum·2016” Verview,
2016
School of Public Administration, Central South University, Changsha, Hunan 410083, China; Central South University of Science & Innovation and Society Development Research Center Changsha, Hunan 410083, China
On Establishment Of The“Co-Governance”Mechanism For Food Safety With Chinese Characteristics——“The Fifth National Science And Technology And Public Policy Forum·2016” Verview, Cao Yu, Dai Xin, Jiang Meishi, Zhu Wenpei, Zhu Xiangdong, Liu Xiaoqiong
Food and Machinery
At the Fifth National S&T and Public Policy Forum-Food Safety Risk Management and Public Policy, particlpating experts based on their professional background, reference the methods and tools of philosophy, law, management, sociology and so on, food safety and science and technology, food safety and philosophical reflection, food safety and policy response, food safety and social participation and other issues were discussed in depth. The conference reflects the latest thinking and research on the subject of domestic food safety strategy and scientific and technological innovation mechanism with Chinese characteristics, criticized “the only government theory”, “the only technical theory”, “the only industry …
