Enhancement Of Docosahexaenoic Acid Production In Schizochytrium Sp. 31 Combining Ethylmethylsulfone And Atmospheric And Room Temperature Plasma Treatment,
2018
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu 214122, China
Enhancement Of Docosahexaenoic Acid Production In Schizochytrium Sp. 31 Combining Ethylmethylsulfone And Atmospheric And Room Temperature Plasma Treatment, Zhao Ben, Wang Wu, Li Changling, Yang Hailin
Food and Machinery
For establishing an efficient and stable mutagenesis method on breeding Schizochytrium DHA higher producers, the wild-type strain named Schizochytrium sp. 31 was mutated combining Ethylmethylsulfone (EMS) and Atmospheric and Room Temperature Plasma (ARTP) treatment. Mutagenic efficiency, fermentation indexes of the mutants were compared and analyzed. Under this compound mutagenesis method, the positive mutation rate reached 32.2%, which was much higher than that under other two single-factor mutagenesis methods. Besides, DHA production and DHA percentage in total fatty acids reached to 7.2 g/L and 43.2%, which were 35.6% and 19.2% higher than that of the wild-type strain, respectively. After five rounds …
Study On Technology And Enzymatic Property Of Xylanase Produced From Engineered Escherichia Coli,
2018
(Hunan Youtell Biochemical Co.， Ltd., Yueyang, Hunan 414000, China; Shandong Youtell Biochemical Co.， Ltd., Zoucheng, Shandong 273500, China
Study On Technology And Enzymatic Property Of Xylanase Produced From Engineered Escherichia Coli, Liu Guofeng
Food and Machinery
In this study, the extraction technology and enzymatic property of xylanase produced from engineered Escherichia coli are fully examined. The extraction of production process of xylanase was determined and the forage enteric xylanase was successfully obtained after cell broken (high-speed ball grinding), solid-liquid separation, aseptic (filtering) hollow fiber membrane, ultrafiltration concentra-tion and drying packaging orderly. This production showed desirable thermal stability and its release rate was 5% and 98.5% in pH 2.5 and pH 5.5 phosphate buffer, respectively. The product appearance exhibited good gloss and it could meet the requirements of feed enzyme market well. The xylanase showed the maximal …
Study On Compatibility Of Tallow And Four Kinds Of Plant Oil,
2018
College of Food Science and Biological Engineering, Tianjin Agricultural University, Tianjin 300384, China; Tianjin Engineering and Technology Research Center of Agricultural Products Processing, Tianjin 300384, China; Tianjin Agricultural Innovation Demo
Study On Compatibility Of Tallow And Four Kinds Of Plant Oil, Yao Di, He Xinyi, Yan Xichun, Li Xu, Zhen Runying
Food and Machinery
To enrich the variety of tallow products and reduce its melting point and hardness, the melting point and fatty acid composition properties of tallow, rapeseed oil, soybean oil, olive oil and cooking oil were analyzed. With the binary compatibilities of tallow and other four kinds of plant oil, their compatibility was studied through isothermal curve (SFC-T) and deviation curve (△SFC-T). The results suggested that four kinds of binary compatibilities mainly showed partial crystal phenomenon at different temperatures. The linear relationship of isothermal curve was good at 0～40 ℃ centigrade of each group(R2＞0.95). Among the four plant oils, rapeseed …
Effect Of Fermentation On Alleviating Physical Fatigue Of Ziziphus Jujuba Polysaccharide,
2018
College of Food Science and Biological Engineering, Tianjin Agricultural University, Tianjin 300384, China
Effect Of Fermentation On Alleviating Physical Fatigue Of Ziziphus Jujuba Polysaccharide, Wang Hongjie, Zhang Pingping, Ou Keke, Feng Cong, Chuai Donghua
Food and Machinery
The effects of fermented and unfermented Ziziphus jujuba polysaccharide on the physical fatigue alleviation in mice was investigated in this study. 56 male SPF class Kunming mice were fed with different doses of polysaccharides, and their body weight, exhaustive swimming time and related anti-fatigue evaluating indexes were measured after treated for 4 weeks. Tests showed that, compared with the normal control group, the mice fed with the polysaccharides from fermented and unfermented Ziziphus jujuba had a prolonged exhaustive swimming time. The percentage elongation was 32.01% for the high-dose unfermented jujuba polysaccharide treated group, and the percentage elongation was 47.98% for …
Study On The Compressibility Of Potato Residue,
2018
Inner Mongolia Business & Trade Vocational College, Hohhot, Inner Mongolia 010070, China
Study On The Compressibility Of Potato Residue, Gao Jingjing, Guo Wenbin, Yu Zhihong
Food and Machinery
A large amount of reusable potato residues were obtained from starch production, and its compressibility had great effect on the production process selection and the design of equipment. The compressibility of potato residue was experimentally studied, and the stress-strain curve was measured and regressed. The results showed that the potato residue experienced three stages of being loose, transitional and tight during the compression, and the parameters, related to the compressibility, were obtained, such as bulk modulus and specific energy consumption. In the study, the compressibility and energy consumption under different compression rates and different feed quantities were also analyzed, and …
Synchronous Detection Of Multicomponent Trans-Fatty Acids And Investigation Of Content In Infant Formula Farina,
2018
Nanchang Institute for Control of Food and Drug, Nanchang, Jiangxi 330038, China; Nanchang Key Laboratory of Food Safty Detection and Controling, Nanchang, Jiangxi 330038, China
Synchronous Detection Of Multicomponent Trans-Fatty Acids And Investigation Of Content In Infant Formula Farina, Huang Li, Li Jinlin, Wang Chufang, Wan Liang
Food and Machinery
In this study, we established multicomponent trans-fatty acids(TFAs) synchronous detection method, and on this basis the content of various components of TFAs from 38 batches of commercial infant formula farina was investigated. The results showed the average content of TFAs in infant formula farina was 0.749 3 mg/g, and the overall content was low. The TFAs total content was within a range of 0.04～1.0 mg/g in approximately 76.3% of samples. The main component was C18:1-11T, C19:1-7T, C18:3-9T/12T/15T, C18:1-9T and C18:2-9,12TT. Moreover, we found that the ingredient formula and processing technology were two …
Determination The Content Of Ethanol In Low Alcohol Beverages By Gas Chromatography,
2018
Xinjiang Academy of Analysis and Testing, Urumqi, Xinjiang 830011, China
Determination The Content Of Ethanol In Low Alcohol Beverages By Gas Chromatography, Chen Guotong, Mao Qiongling, Zuo Shurui, Chen Junyu, Wang Aixia, Shao Jiali
Food and Machinery
The ethanol content of beverages was measured by two methods, the static headspace gas chromatography and the traditional method of gas chromatography after distillation, using TG-WAXMS chromatographic column. The two methods had good linear relationship in the volume fraction of ethanol ranging from 0.01% to 5.00%. In traditional distillation method, the detection limit of volume fraction of ethanol was 0.003%, and the detection limit of static headspace was 0.001%. The results showed that due to the complicated pre-treatment processes, the recovery rate of the gas chromatography after traditional distillation was relatively low (83%~91%). While the method of direct determination of …
Determination Of 45 Elements In Yingde Black Tea By Icp-Ms,
2018
Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China; Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals, Guangdong Institute of Analysis, Guangzhou, Guangdong 510070, China; Universi
Determination Of 45 Elements In Yingde Black Tea By Icp-Ms, Zhang Xiancai, Zhang Chunhua, Huang Xiaolan, Wu Huiqin
Food and Machinery
The inductively coupled plasma mass spectrometry (ICP-MS) combined with microwave digestion was employed in this study for the determination of forty five elements in Yingde black tea. The results showed that 45 elements had good linearity and correlation coefficients all greater than 0.999 5. The limits of detection (LODs) were ranged from 0.000 1 to 20.090 0 μg/L. The recovery rates were between 82.58% and 119.19% with the relative standard deviations (RSDs) of 0.20%～7.03%. The RSD of all the elements except Sb was 0.15%～9.14% in precision experiments. The method was validated by standard reference material (GBW10083), the determination values of …
Establishment Of Hplc Method For Anthocyanins Determination Of Purple Bud Tea Tree,
2018
Key Lab of Tea Science of Ministry of Education, Changsha, Hunan 410128, China; National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Changsha, Hunan 410128,China
Establishment Of Hplc Method For Anthocyanins Determination Of Purple Bud Tea Tree, Liu Lingfeng, Zhou Yang, Lin Ling, Xiao Wenjun, Gong Zhihua
Food and Machinery
The purple bud tea zijuan,zixuan9803,Hongyafoshou an An73 shoots were used as research objects. Using three plant anthocyanins as external standards,a HPLC method for simultanteous detection of various anthocyanins in purple bud tea tree was established. That is: after been extracted with 80% ethanol and refluxed, the tea is degreased with a volume ratio of 112 mixture of n-hexane:ethyl acetate:water. A C18 column was used with acetonitrile and 0.2% phosphoric acid ultra-pure water as the mobile phase. Gradient,the organic phase elution gradient: 0～55 min, 10%～40%, flow rate 0.8 mL/min, column temperature 30 ℃, detection wavelength 520 nm. Each anthocyanins can …
Determination Of Ethephon Residues In Vegetables And Fruits Bysilane Derivation Gas Chromatography,
2018
Gansu Institute of Business and Technology, Lanzhou, Gansu 730010, China; Gansu Zhongshang Food Quality Test and Detection Co., Ltd., Lanzhou, Gansu 730010, China
Determination Of Ethephon Residues In Vegetables And Fruits Bysilane Derivation Gas Chromatography, Wang Jiebin, Hong Xia, Qian Yinwen, Chai Zonglong, Zhou Xinkui, Zhang Yanjun, Zhang Yaxin
Food and Machinery
A silane derivatization gas chromatography (GC-FPD) detection method was established to determine the residual amount of ethylene in vegetables and fruits. Samples from ultrasonic extraction by methanol, liquid-liquid extraction by ether, and concentrated blow drying，were compared the derivative effects of 2 kinds of silanylation reagents under different derivatization conditions.After that, they were determined by gas chromatograph with flame photometric detector (P filter), external scalar method. The optimum derivation was as follows.Adding 100 μL BSTFA and 50 μL acetonitrile to the dry extract , derivation 35 min in the oven at 65 ℃. The external has good linear relationship in the …
Experience And Enlightenment Of European And American Exchange System Of Food Safety Risk,
2018
School of Humanity and Law, Huazhong Agricultural University, Wuhan, Hubei 430070, China
Experience And Enlightenment Of European And American Exchange System Of Food Safety Risk, Li Changjian, Zhang Tianya
Food and Machinery
Compared with developed countries in Europe and America, the construction of China's food safety law started relatively late, and there are still a series of imperfection at the legislative level. This paper uses literature analysis and comparative analysis to analyze the theoretical framework of the food safety risk exchange system, from the three aspects of the food safety risk exchange management department, the food safety risk exchange legislation system, and the food safety risk exchange mechanism. A comparative analysis of the food safety risk exchange system in Europe and the United States resulted in a useful inspiration for China's food …
The Legal Regulation On The Use Of Non-Gm(O) Label On Food,
2018
Huazhong Agricultural University School of Humanity and law, Wuhan, Hubei 430070, China
The Legal Regulation On The Use Of Non-Gm(O) Label On Food, Liu Xuxia, Wang Qi
Food and Machinery
Non-GM(O) label is widely used on food in our country. The existence of information asymmetry increase the risk of misuse of non-GM(O) label,while the market mechanism itself can not regulate the misuse. In China,the legislation regulating the non-GM(O) label is not specific, thus misuse of non-GM(O) label was generally not considered to be illegal in judicial decision. Existing research mainly focuses on non-GM(O ) advertising instead of non-GM(O) label. By contrast, there are specific legislation which restrict the scope of food on which the non-GM(O) label can be used in Germany, Japan and the United States. The use of Non-GM(O) …
Particle Mixed Behavior Research Based On Dem,
2018
College of Mechanical and Electrical Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
Particle Mixed Behavior Research Based On Dem, Zhang Kaijie, Xu Qiang, Wang Tao
Food and Machinery
In order to study particle rotary motion behavior and its mixing effect, five kinds of different speeds and fitted the mathematical model of particle mixing data applying to EDEM and MATLAB were stimulatedwith the model of Rotary mixing equipment and based on the theory of DEM simulated the. The virtual experiments predicted the best speed. The results showed that the virtual experiments not only could research particle cyclotron motion characteristics of the curve distribution, but also the method of DEM was conducive to study the mixing mechanism. Compared with the five speeds, the degree of mixing was 62.27%, closed to …
Improvement Design Of Fumigation Furnace Based On Cfd,
2018
Zhejiang Ribong Intelligent Equipment Co., Ltd, Jiaxing, Zhejiang 314006, China
Improvement Design Of Fumigation Furnace Based On Cfd, Zhang Lingling, Shen Shijia, Liu Hong
Food and Machinery
A method of improving the flow distribution within the heating chamber to enhance the fumigating effect through changing the fumigation oven structure based on the CFD technology were investigated in this study.. We established a two-dimensional and three-dimensional simulation model for the heating chamber, and the distribution of the fumigation vapor oven was compared by simulation. The results which showed that the optimized structure of the heating chamber could improve the distribution of the vapor flow field.
Research On Performance Of Meat-Barbecue Furnace Based On Fluent Software,
2018
Wuchang Shouyi University, Wuhan, Hubei 430064, China
Research On Performance Of Meat-Barbecue Furnace Based On Fluent Software, Lu Zhongming, Xu Shenglin
Food and Machinery
To solve the problems of daily barbecue furnaces in the barbecue process, such as severe environmental pollution, great heat loss and inconvenient cleaning and carrying, the author designs a kind of portable barbecue furnace taking outdoor flat gas tank as heat source and combining infrared flameless burner with rotary barbecue grill. This paper introduces the structure and operation principles of the barbecue furnace, and uses FLUENT software to conduct a simulated analysis of the temperature field in the barbecue furnace. The results showed that the barbecue furnace has the reasonable temperature distribution in the overall structure; uniform air flow; the …
Design And Experimental Research Of High Clearance Universal Operation Chassis,
2018
College of Engineering, Hunan Agricultural University, Changsha, Hunan 410128, China; Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, Hunan 410128, China
Design And Experimental Research Of High Clearance Universal Operation Chassis, Li Ze, Shi Yixin, Jiang Pin, Hu Wenwu, Lin Wei
Food and Machinery
A high ground clearance hydraulic four-wheel drive universal operation chassis was designed. Through the preliminary survey data, the initial target value of the design was established, the structure of the chassis and hydraulic system were designed. Combined with the target value of performance parameter, the type of walking pump and walking motor was determined, and the finite element analysis of steering leg and frame structure design were completed. Based on that, the chassis was passed through the performance analysis to determine the relationship between the wheelbase, and the structural parameters. Finally, the prototype was tested and the pass test was …
Thermal Physical Property Calculation And Freezing Time Numerical Simulation Of Shrimp,
2018
Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing & Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy
Thermal Physical Property Calculation And Freezing Time Numerical Simulation Of Shrimp, Tang Wan, Xie Jing, Wang Jinfeng, Zhou Hongjian
Food and Machinery
Based on the thermal physical parameters of shrimp, the equivalent heat capacity method was used to process latent heat in phase change, the finite difference method was proposed for modeling irregular shrimp, and the freezing times of symmetrical section in the shrimp freezing layer from the refrigerator bottom with 15 mm, 50 mm and 100 mm upwards were predicted, which were also validated by experiments. Compared numerical simulation results with experimental verification, it could be found that the correlation coefficient between simulated freezing time and test time curve was 0.996, the maximum error in the section center of shrimp was …
Influence Of Air Supply Parameters On The Freezing Process Of Mashed Potatoes,
2018
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Influence Of Air Supply Parameters On The Freezing Process Of Mashed Potatoes, Yue Zhankai, Wan Jinqing, Li Jianguo
Food and Machinery
In order to investigate the sensitivity of freezing time to air temperature and velocity, and analyze the variation of the freezing conditions and freezing time of mashed potatoes in different locations, a three-dimensional unsteady numerical model was established. According to the thermo-physical properties of mashed potatoes, the process of the temperature decreasing during freezing was simulated by Fluent. The unevenness of freezing conditions and time was obtained under different air velocity-inlet and temperature-inlet. The results showed that the change in the percentage of air temperature-inlet had a greater effect on freezing time than air velocity-inlet. With the increase of the …
Cryoprotective Effects On Yeast Of Enzymatic Hydrolysates From Silver Carp,
2018
College of Chemical and Biological Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, China; Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, Changsha, Hunan 410114, China
Cryoprotective Effects On Yeast Of Enzymatic Hydrolysates From Silver Carp, Xiong Sijia, Wang Faxiang, Yu Jian, Li Xianghong, Wang Jianhui, Guo Xingxin, Liu Yongle
Food and Machinery
It is of great significance to improve the quality of frozen dough by selecting yeast antifreeze. The enzymatic hydrolysates from silver carp were prepared by enzymolysis with protamex, and their degree of hydrolysis (%), composition and electrophoresis profiles were analyzed. Moreover, the effects of enzymolysis time and concentration of enzymatic hydrolysates on the survival rate of yeast were also investigated. The results showed that yeast had poor frost resistance, with only 0.69% of survival rate after the first freeze-thaw cycle. Components of hydrolysates prepared by enzymolysis for 15, 30, 60, 120, 240 min were similar, but the products of 15 …
Prediction Model Of Microbial Growth Based On Neural Network,
2018
College of Information Engineering, Shanghai Maritime University, Shanghai 201306, China
Prediction Model Of Microbial Growth Based On Neural Network, Hou Qi, Liu Jing, Guan Xiao
Food and Machinery
Most of the existing predictive models are empirical models which contain too many parameters without biological explanations. In this study, a non-empirical growth prediction model based on neural network was proposed. A BP neural network secondary growth model was established by using Listeria monocytogenes as an example, using the temperature, pH value and Aw value of the experimental environment. The growth rate and double time of microbes were fitted in different environments. Subsequently, combining with the initial concentration of microorganisms, the primary model of microorganism growth with time was predicted. Finally, the growth data of Listeria monocytogenes were tested, and …
