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 …
A New Algorithm For Fruit Feature Extraction Of Apple,
2018
Shangqiu Institute of Technology, Shangqiu, Henan 476000, China
A New Algorithm For Fruit Feature Extraction Of Apple, Chen Qianhui, Wu Degang
Food and Machinery
At present, the main algorithm used in feature extraction of apple is the traditional Hough algorithm. The algorithm has the disadvantages of complicated operation and poor real-time performance. In view of this situation, a new algorithm of apple fruit feature extraction is proposed in this paper. A sliding Gaussian template and apple image are convoluted to extract apple circles in this algorithm. Experiments and simulation results show that this method can achieve high accuracy of apple fruit detection under single, adjacent and overlapping conditions. In the case of a single apple, the detec-tion accuracy of apple fruit can reach 96.6%. …
Study On The Application Of Glycerol Monlaurate Microemulsion In Shredded Squid,
2018
International Maritime College, Zhoushan, Zhejiang 316021, China
Study On The Application Of Glycerol Monlaurate Microemulsion In Shredded Squid, Zhu Yazhu, Weng Peifang, Jiang Huazhen
Food and Machinery
The application of the glycerol monolaurate (GML) and glycerol monlaurate microemulsion (ME) in squid processing was studied. Effects of amounts and methods of ME addition on the preservation of squid shreds were investigated with the total number of colonies and sensory evaluation as the main evaluation index. The results showed that the effective bacteriostatic amount of GML monomer and ME was 0.50% and 1.00% (equivalent to GML monomer 0.12%) , respectively, in the processing of shredded squid, and the addition of two times seasoning was better than one seasoning. However, when the addition amount of GML monomer was more than …
Effect Of Poly (Ε-Caprolactone) Modified Atmosphere Packaging Film On Postharvest Quality Of Spinach,
2018
College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
Effect Of Poly (Ε-Caprolactone) Modified Atmosphere Packaging Film On Postharvest Quality Of Spinach, Cheng Peifang, Dong Tungalag, Chun Yan, Hu Jian, Yun Xueyan
Food and Machinery
In order to investigate the fresh-keeping effect of PCL modified atmosphere packaging film on spinach. The effects of unpacked, LDPE film（control）and PCL film packaging treatments on postharvest quality of spinach during storage at 4 ℃ were studied. The results indicated that compared with the control group of unpacked both of the packaging films could improve the postharvest quality of the spinach, and PCL packaging treatment group could be better in the development of initial atmosphere suitable for the storage of spinach. Moreover, PCL film was better in delaying the increase of weight loss ratio and inhibiting the degradation of chlorophyll …
Study On Effect Of Different Storage Temperatures On Ipomoea Aquatica,
2018
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
Study On Effect Of Different Storage Temperatures On Ipomoea Aquatica, Yang Chong, Xie Jing
Food and Machinery
The preservation effects of different storage temperatures (0，5，10，15 ℃) on ipomoea aquatica was studied on sensory evaluation, vitamin C, water migration by low-field nuclear magnetic resonance (LF-NMR) technique, etc.. The results show that the chilling injury happened easily under 0 ℃ cold store and senescence accelerated under 15 ℃. Under 5 ℃ and 10 ℃, the sensory quality, the content of chlorophyll, vitamin Cand other quality indexes of ipomoea aquaticawere maintained relatively well, and the quality above all maintained well for 8 d storage. Under 5 ℃, chilling injury happened at later storage (the tenth days later) and the quality …
Extract Of Volatile Oil And Antibacterial & Insecticidal Activity Of Large Red Algae Gracilaria Lemaneiformis,
2018
College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266000, China
Extract Of Volatile Oil And Antibacterial & Insecticidal Activity Of Large Red Algae Gracilaria Lemaneiformis, Wang Guorui, Pang Jinlong, Zhang Demeng, Li Fang
Food and Machinery
The volatile oil of Gracilaria lemaneiformis was extracted by direct steam distillation and solvent extraction-steam distillation, meanwhile gas chromatography-mass spectrometry (GC-MS) and antibacterial & insecticidal activity were conducted. The GC-MS showed that compared with direct steam distillation extraction, in solvent extraction-steam distillation extraction the relative content of aldehyde compounds which has lower odor threshold is 0.20%, meanwhile the relative content of carboxylic acid and ester is 21.54% in solvent extraction-steam and distillation extraction. The antibacterial activity of volatile oil on 5 kinds of pathogens （Escherichia coli O157, Staphylococcus aureus, Salmonella enterica, Listeria monocytogenes, Vibrio parahemolyticus） is moderate, and the median …
Extraction And Antioxidant Activity Of Ursolic Acid From Amygdalus Communis L. Peel,
2018
Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Urumqi, Xinjiang 830054, China; Key Laboratory of Plant Stress Biology in Arid Land, Xinjiang Normal University, Urumqi, Xinjiang 830054, China; College of Life Sciences, Xinj
Extraction And Antioxidant Activity Of Ursolic Acid From Amygdalus Communis L. Peel, Zhang Jun, Li Jin, Lu Haiying, Ma Xue
Food and Machinery
Based on the results of single-factor experiments, orthogonal test of ursolic acid from Amygdalus communis L. peel were carried out to determine the optimum process parameters.The antioxidant activities were evaluated by the reducing power, DPPH free radical, hydroxyl free radical and hemolysis of mice red blood cells.The optimum extraction parameters were determined as follows: alcohol concentration 65%,extraction temperature 80 ℃; solid-to-solvent ratio 120 (g/mL); extraction time 1.5 h. Under these conditions, the experimental yield of ursolic acid was 2.89%. The concentration of ursolic acid was 0.1 mg/ml, ursolic acid of Amygdalus communis L. peel displayed a strong antioxidant activity, the …
Effect Of Preparation Technology On Quality And Aroma Components Of Chill Seed Oil,
2018
Department of Food Science and Biotechnology, Tianjin Agriculture University, Tianjin 300384, China; Tianjin Engineering and Technology Research Center of Agricultural Products Processing, Tianjin 300384, China
Effect Of Preparation Technology On Quality And Aroma Components Of Chill Seed Oil, Zhen Runying, Shen Wenjiao, He Xinyi, Wang Haifeng, Liu Bin, Feng Changlu
Food and Machinery
The oxidation value, acid value, color, fatty acid composition, volatile substances were measured to choose the optimum process for the preparation of chilli seed oil. The effects of two kinds of methods, enzymatic hydrolysis-ethanol-assisted and normal-temperature extraction, on the quality and aroma components of chilli seed oil were compared. The results showed that the chilli seed oil obtained by two kinds of preparation methods was orange-yellow, the acid value was less than 4.0 mg/g, the peroxide value was less than 12 meq/kg. The capsaicin contents of chilli seed oil obtained by enzymatic hydrolysis-ethanol-assisted extraction and normal-temperature extraction were 1.46,and 0.54 …
Purification Technology Of Flavones From Vaccinium Bracteatum Thunb Leaves Using Macroporous Resin,
2018
School of Chemistry & Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, China; Fine Chemical Product Development Research Institute, Suzhou University, Suzhou, Anhui 234000, China
Purification Technology Of Flavones From Vaccinium Bracteatum Thunb Leaves Using Macroporous Resin, Zhang Dejin, Chen Yiyong, Hu Yalin, Liu Xiang
Food and Machinery
In order to purify flavones from Vaccinium Bracteatum Thunb Leaves(VBTL) preliminarily, the static adsorption and desorption properties of four resins were compared. The purification technology of flavones from VBTL was investigated by dynamic adsorption and desorption experiments. The effect of sample concentration, loading sample volume, ethanol solution for desorption, flow rate of the eluent and volume of eluent on adsorption and desorption rate were studied. In addition, the purification effect was evaluated by removal rate of proteins and polysaccharides and HPLC. The results showed that NKA-II resin had a relatively high rate of adsorption and desorption as well as a …
Study On Microwave-Assisted Extraction Process For Polysaccharide From The Branches And Leaves In Chrysanthemum Indicum And Its Anti-Oxidant Activity,
2018
Shaanxi Key Laboratory for Catalysis, Shaanxi University of Technology, Hanzhong, Shaanxi 723000, China
Study On Microwave-Assisted Extraction Process For Polysaccharide From The Branches And Leaves In Chrysanthemum Indicum And Its Anti-Oxidant Activity, Liu Cunfang, Wu Rui, Zhao Hua, Tian Guanghui
Food and Machinery
The polysaccharide obtained from the branches and leaves of Chrysanthemum indicum was extracted by microwave assisted extraction after its powders decolorized and degreased, and then the polysaccharide extraction content was determined by phenol-sulfuric acid method. The extraction process of the polysaccharide was studied by single factor experiment which controlled liquid-solid ratio, extraction temperature, extraction time, and microwave power, and the orthogonal experiment was tested and based on single factor experiment, then determined the best extraction process. Those free radical cleared effects of its polysaccharide were tested by Fenton reaction and DPPH reaction. The results showed that the polysaccharide extraction content …
