Simultaneous Determination Of 8 Kinds Of Vitamin E Isomer In Vegetable Oil Using Reversed-Phase Ultra Performance Liquid Chromatography,
2019
PinCe Testing Co., Ltd., Shanghai 201108, China
Simultaneous Determination Of 8 Kinds Of Vitamin E Isomer In Vegetable Oil Using Reversed-Phase Ultra Performance Liquid Chromatography, Dong Xin
Food and Machinery
An analytical method was developed for the determination of 8 kinds of vitamin E isomer (tocopherol and tocotrienol) in vegetable oil by solvent dilution extraction-ultra performance liquid chromatography. The sample was extracted with acetone. The separation was achieved by using PFP column and an elution with the mobile phases of methanol and water (93∶7) at a flow rate of 0.4 mL/min. The identification and quantitative analysis were carried out with fluorescence detector at an ecxitation wavelength of 295 nm and an emission wavelength of 330 nm. The recoveries ranged from 90.0% to 100%, with the relative standard deviation (RSDs) between …
Risk Assessment Of Pesticide Residues In Muskmelon In Xinjiang,
2019
College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China; Institute of Agricultural Quality Standard and Testing Technology, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China; Laborator
Risk Assessment Of Pesticide Residues In Muskmelon In Xinjiang, Wei Kaili, Zhou Xiaolong, Yan Qiaoli, Tao Yongxia, Wang Cheng
Food and Machinery
To evaluate the dietary risk level of pesticide residues in muskmelon in Xinjiang and identify the types of pesticide residues with relatively high risks. Based on the research of 127 muskmelon samples of the 2-year-producing in Xinjiang, 60 kinds of pesticide residues were analyzed by chronic, and the acute dietary exposure assessment, and the dietary risk levels were evaluated. Moreover, the usage of veterinary drug residue council sort veterinary drug residue risk matrix, and the pesticide residue in high-risk types were discussed. The results showed that 10 kinds of pesticide residues, icluding phenyl ether metronidazole, chlorpyrifos, chlordimeform, and chlorphenidine, were …
Survey And Management Dimension Of Food Safety Management In China,
2019
Party School of The Changshou District of the Communist Party of China, Chongqing 401220, China
Survey And Management Dimension Of Food Safety Management In China, Luo Hui
Food and Machinery
At present, based on the predicament of global food safety governance and the requirement of China to promote the improvement of social governance system and the modernization of governance capacity, China's food safety management has a high implementation efficiency in the construction of system and the promotion of government-led system practice. However, at the level of food safety governance, there are still some problems, such as the degree of information disclosure to be further expanded, the lack of operability of the food recall system, the disunity of the main body caused by the administrative supervision system, and the lack of …
Design And Motion Analysis Of Main Cam Of High Speed Paper Picking Mechanism,
2019
College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xian, Shaanxi 710021, China
Design And Motion Analysis Of Main Cam Of High Speed Paper Picking Mechanism, Yang Benben, Cao Jujiang, Liu Yansong, Yang Kun
Food and Machinery
A double cam-four-bar combination mechanism was proposed based on the analysis of actuator position and attitude in paper-picking process. By using higher order polynomial and arc combination curve, the contour equation of the main drawing of high-speed paper-picking mechanism with higher order reciprocal continuity and smaller absolute value was obtained. The radius of base circle and the motion angle of cam were analyzed with the aim of pressure angle and angular acceleration of main cam. The results showed that using higher order polynomial and arc combination curve as the main cam contour equation could meet the requirements of the position …
Effects Of The Dissolved Oxygen Level And The Vibration On Oxidative Stress Of Grouper During Water Transport,
2019
Shanghai Ocean University College of Food Science and Technology, Shanghai 201306, China; Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center, Shanghai 201306, China; Shanghai Professional Technology Service Platform on
Effects Of The Dissolved Oxygen Level And The Vibration On Oxidative Stress Of Grouper During Water Transport, Wu Bo, Xie Jing
Food and Machinery
By evaluating the changes of antioxidant enzyme activity, antioxidant capacity, metabolites, glycogen and lactic acid content in tissues, the effects of different packaging oxygenation modes and transport road conditions on oxidative stress of grouper during waterborne transport were studied. The results showed that the antioxidant enzyme activity, antioxidant capacity and metabolites of grouper under continuous aeration and low oxygen vibration changed non-significantly, which indicated that the body could regulate and maintain the balance of antioxidant system. However, the activities of antioxidant enzymes, antioxidant capacity, lipid metabolites and anaerobic metabolic material production in grouper under very low dissolved oxygen and continuous …
Application And Research Progress Of Led Light Sterilization Technology In Fresh-Keeping Processing Of Fruit And Vegetables,
2019
Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China; Quality Supervision, Inspection and Testing Center for Cold Storage and Refrigeration Equipment, Shanghai 201306, C
Application And Research Progress Of Led Light Sterilization Technology In Fresh-Keeping Processing Of Fruit And Vegetables, Zhang Yuchen, Xie Jing
Food and Machinery
LED is a kind of green and environment-friendly cold light source, which has the advantages of non-toxicity, non-residue and wide application prospects in killing foodborne pathogenic bacteria in fruit and vegetable postharvest by using LED illumination technology. In this paper, the characteristics, sterilization mechanism and sterilization effect of visible and ultraviolet LED lamps were summarized. The sterilization effect of visible and ultraviolet LED lamps assisted by several different photosensitizers, as well as the dosage, effect and strains of the photosensitizers used werealso introduced. Finally, the existing problems and the future development direction of LED illumination sterilization technology were proposed.
[Jp2]Extraction And Isolation Of Serotonin From Walnut And Its Anti-Ischemic Activity[Jp],
2019
Food Faculty of Jiangnan University, Wuxi, Jiangsu 214122, China
[Jp2]Extraction And Isolation Of Serotonin From Walnut And Its Anti-Ischemic Activity[Jp], Chen Chen, Xu Deping, Jin Meng, Zhang Xiaojuan
Food and Machinery
The functional components of anti-myocardial ischemic activity in walnut were studied. The walnuts were squashed and then extracted by 70% ethanol, and ethyl acetate. The ethyl acetate phase was concentrated and then separated by macroporous resin, MCI, and ODS columns. MTT assay and kit method were applied，along with the model of myocardial ischemia/reperfusion injury to detect the anti-ischemic activity of each isolated component. The results showed that 5,10-dihydroxytryptamine and Shepherdine were separated from walnuts for the first time. Moreover, 5,10-dihydroxytryptamine could significantly maintain the viability of myocardial cell and reduce the enzymes (LDH/CK) released by ischemia/reperfusion injury, having significant protective …
Review Of Numerical Simulation Of Fluid-Particle Food Thermal Processing Based On Heat And Mass Transfer Theory Of Porous Media,
2019
School of Liquor and Food Engineering, Guizhou University, Guiyang, Guizhou 550025, China
Review Of Numerical Simulation Of Fluid-Particle Food Thermal Processing Based On Heat And Mass Transfer Theory Of Porous Media, Yu Bingyan, Deng Li, Cheng Fen, Xu Jia, Shi Yu
Food and Machinery
This review outlined the principle and development of mathematical model based on the theory of heat and mass transfer in porous media. The research emphasis and its progress of mathematical model in the development and application were analyzed from the aspects of evaporation description, parameter determination and definite conditions and so on. Thereafter, an introduction of the advantages and disadvantages of the porous media mathematical model which applied in food thermal processing were given. Moreover, the development prospects of porous media mathematical model applied to fluid-particles food thermal processing were also summarized，which provided a reference for the numerical simulation research …
Preparation And Identification Of The Monoclonal Antibody Of Kunitz Trypsin Inhibitor From Soybean,
2019
College of Food and Bioengineering, Henan University of Science & Technology, Luoyang, Henan 471023, China; Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Preparation And Identification Of The Monoclonal Antibody Of Kunitz Trypsin Inhibitor From Soybean, Wang Yao, Li Yanhong, Cao Jinbo, Sun Yaning, Xing Yunrui, Chen Xiujin, Deng Ruiguang, Hu Xiaofei
Food and Machinery
To prepare monoclonal antibodies against soybean Kunitz trypsin inhibitor (KTI) with good immunological characteristics. BALB/c mice were used to immunize with 50 μg of KTI, the antiserum titer and sensitivity were identified via indirect ELISA and indirect competitive ELISA. The mice which serum has better titer and sensitivity were selected for cell fusing, then he hybridoma cell strain which stabilization secreted KTI monoclonal antibody (mAb) were screened. Thereafter, mAb was prepared by inducing ascites in vivo and identified the immunological characteristics. The result indicated that the NO.1 mouse was confirmed to produce the antibody with the highest titre, IC50 …
Effects Of Leucine And Α-Ketoglutarate On The Weight, Serum, Visceral Organ Of Mice,
2019
Institute of Subtropical Agriculture, Chinese Academy of Science, Changsha, Hunan 410125, China; Key Lab Agro-Ecology Processing Subtropical Region, Chinese Academy of Science, Changsha, Hunan 410125, China; University of Chinese Academy of Science, Beiji
Effects Of Leucine And Α-Ketoglutarate On The Weight, Serum, Visceral Organ Of Mice, Jin Shunshun, Yao Kang, Yin Yulong, Kang Baoju, Li Yuying, Wang Peng
Food and Machinery
Forty male C57BL/6 mice aged 4 weeks were selected and randomly divided into 4 groups. Mice in control groups drank normal water, while those in the experimental groups were treated 1.0% α-ketoglutarate acid (group Ⅰ), or 1.8% leucine (group Ⅱ), or 1.8% leucine and 1.0% α-ketoglutarate acid (group Ⅲ) via drinking water. The experimental lasted 35 days. The results showed as follows: ① The growth performance of group Ⅲ was 8.7%, 10.1%, and 10.4% lower than that of the groups control,ⅠandⅡ, respectively； ② Serum albumin in group Ⅲ was significantly higher than that of the groups control,ⅠandⅡ(P<0.05)； ③ The cardiac index of group Ⅲ increased by 19.3%, 13.6%, and 15.2%, respectively, compared with groups control,ⅠandⅡ； ④ The abdominal fat index of group Ⅲ was 24.1%, 10.0%, and 6.7% lower than that of groups control,ⅠandⅡ, the cross-sectional area of the gastrocnemius muscle of group Ⅲ was 46.9%, 20.2%, 27.9% higher than that of groups control,ⅠandⅡ, respectively. In summary, the combination of leucine and α-ketoglutaric acid can reduce the body weight of mice, strengthen the use of fat by organs, and increase the cross-sectional area of gastrocnemius muscle fibers.
Safety Evaluation Of Freeze-Dried Powder Of Sika Deer Antler Blood And Its Effect On Alleviating Physical Fatigue In Mice,
2019
School of Public Health of Nanjing Medical University, Nanjing, Jiangsu 211166, China; Safety Assessment and Research Center for Drug, Pesticide, and Veterinary Drug of Jiangsu, Nanjing, Jiangsu 211166, China
Safety Evaluation Of Freeze-Dried Powder Of Sika Deer Antler Blood And Its Effect On Alleviating Physical Fatigue In Mice, Qin Heng, Li Shifen, Hu Qi, Huan Fei
Food and Machinery
To evaluate the food safety of sika deer antler blood freeze-dried powder, the acute toxicity test in mice, and the 30-day feeding and three genotoxicity tests in rats were conducted. The effects of sika deer antler blood freeze-dried powder on alleviating physical fatigue in mice were studied by weight-bearing swimming in the tails, determination of the urea level in serum, the glycogen reserve in liver and the lactic acid level in serum before and after the exercises. Results: the freeze-dried powder of sika deer antler blood was a substance without toxicity according to the acute toxicity test (MTD>15 g/kg·BW). …
Optimization Of Ultrasonic Assisted Alcohol Extraction Of Polyphenols From Opuntia Milpa And Its Antioxidant And Hypolipidemic Activities,
2019
College of Forestry, Northeast Forestry University, Harbin, Heilongjiang 150040, China
Optimization Of Ultrasonic Assisted Alcohol Extraction Of Polyphenols From Opuntia Milpa And Its Antioxidant And Hypolipidemic Activities, Wang Jing, Guo Yang, Bao Yihong, Tian Xue, Li Huan, Qiu Junmeng
Food and Machinery
The extraction of polyphenols from opuntia milpa was prepared by ultrasound-assisted method. The optimum extraction process was determined by orthogonal experiment with the content of polyphenols and DPPH free radical scavenging rate as indicators. The antioxidant and hypolipidemic activities of polyphenol extract from opuntia milpa were evaluated. The results showed that the optimum extraction technology of opuntia milpa was solid -liquid ratio 1∶15, ethanol concentration 65%, at 65 ℃ for 45 min. Under the control of these conditions, the content of polyphenols was 20.51 μg/mL, and DPPH clearance rate was 87.59%. The polyphenol extract of opuntia milpa has good antioxidant …
Effect Of Brewing Conditions On Bioactive Compounds Of Xiangxi Golden Tea And It’S Antioxidant Activity,
2019
Key Laboratory of Human Forest Products and Chemical Industry Engineering, Jishou University, Zhangjiajie, Hunan 427000, China; Institute of Tea Science, Jishou University, Jishou, Hunan 416000, China
Effect Of Brewing Conditions On Bioactive Compounds Of Xiangxi Golden Tea And It’S Antioxidant Activity, Chen Liang, Yu Ji, You Xiangtao, Jin Xuanlu, Ding Jiayun, Ma Chenjin, Yao Maojun
Food and Machinery
In different brewing temperature and time, the changes of tea polyphenols and free amino acids brewing from Xiangxi golden tea, which were detected by UV-visible spectrophotometer, was gotten, and the extraction kinetics model was established. The antioxidant properties were also determined by DPPH and ABTS clearance rate. Results, the concentration of tea polyphenols and free amino acids, DPPH and ABTS clearance rate increased with the brewing temperature rising 60~90 ℃, and the brewing time prolonged 1~30 min, and which tended to be stable after 30 min. The Extraction rate of the tea polyphenols and amino acids followed a second-order reaction, …
Screen Of Probiotic Compound Starter For Capsicum Ferment,
2019
College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430023, China; Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan, Hubei 430023, China; Key Laboratory of Deep Processing of Major Grai
Screen Of Probiotic Compound Starter For Capsicum Ferment, Sun Shuping, Liu Zhiwei, Li Jing, He Lili
Food and Machinery
Lactobacillus plantarum, Saccharomyces cerevisiae and acetic acid bacteria screened from previous experiments were taken as the research objects. Selecting two groups of probiotic compound starter L1 (Lactobacillus plantarum and Saccharomyces cerevisiae), L2 (Lactobacillus plantarum, Saccharomyces cerevisiae and Acetobacter) to produce capsicum ferment, and compared with traditional natural fermentation L0. By observing the changes of main quality indexes such as total acid, pH value, alcoholicity and main efficacy enzymes (superoxide dismutase activity, lipase activity) in the fermentation process, Selected the most suitable strain combination for capsicum fermentation. The results showed that the quality of capsicum ferments was significantly improved by mixed …
Screening Study Of The Rice Varieties Suitable For Processing Ningbo Rice Balls,
2019
National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Screening Study Of The Rice Varieties Suitable For Processing Ningbo Rice Balls, Pan Lihong, Luo Xiaohu, Wang Li, Chen Zhengxing
Food and Machinery
15 kinds of Japonica and Indica rice, and 4 kinds of glutinous rice flours commonly used in the market for making glutinous rice balls, were selected and compared. The physicochemical properties, sensory characteristics and texture of the commercially available Ningbo glutinous rice balls were investigated. The results showed that the glutinous rice flour made from Zhenuo 106 by water milling was more suitable for the production of Ningbo glutinous rice balls. Its main quality index has reached the quality level of Ningbo glutinous rice balls, and it was the most suitable variety for this processing.
Study On The Determination Method Of Potato Peeling Rate,
2019
School of Mechanical and Electrical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China
Study On The Determination Method Of Potato Peeling Rate, Li Shangzhen, Zhu Lixue, Zhang Shiang, Yang Songxia, Yao Huaping, Huang Jianyu
Food and Machinery
Proposed a pixel ratio measurement method, and designs 3 different potato models and 3 different peeling rate orthogonal tests through the model verification method, to verify the determination method. The experimental results showed that there was no significant difference between the actual measured value and the theoretical calculated value of the potato model in the 95% confidence interval, which indicated that the proposed pixel ratio measurement method had a strong credibility in the calculation of the peeling rate of potato. This method is scientific and feasible to evaluate the peeling effect of potatoes, and can be used as an effective …
Research Progress Of Fish Primary Processing Equipment Andautomatic Monitoring Technology,
2019
College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
Research Progress Of Fish Primary Processing Equipment Andautomatic Monitoring Technology, Huang Jianbin, Cheng Fang
Food and Machinery
The research progresses of fish primary processing machinery at home and abroad were reviewed in this study. Moreover the automatic monitoring technology and its application in aquatic products processing were introduced, from two aspects of material processing quality and the equipment running status. This would help to improve the efficiency and quality of fish primary processing and promote technology upgrading of aquatic processing industry.
Research Progress Of Determination Of Benzo-A-Pyrene In Edible Areca Nut,
2019
College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China; Hunan Binzhilang Food Science & Technology Co. Ltd., Xiangtan, Hunan 411100, China
Research Progress Of Determination Of Benzo-A-Pyrene In Edible Areca Nut, Fu Xiaomei, Li Zongjun, Zhao Zhiyou, Luo Fenglian
Food and Machinery
Smoked areca nuts contain harmful substances such as benzo-a-pyrene on its surface, because they are cured in wood smoke in the initial processing process. People's health is seriously threatened by these harmful substances. It is crucial for people to monitor the residues of benzo-a-pyrene effectively in areca nut to ensure the food safety. The sources of benzo-a-pyrene pollution in edible areca nut and the pretreatment methods for detecting benzo-a-pyrene in edible areca nut are summarized in this study, and several instrumental methods for the determination of benzo-a-pyrene in food are also evaluated. Our study is helpful to improving deficiencies and …
Review On Ice Crystal Shape And Assisted Freezing Methods Of Quick-Frozen Food,
2019
Shanghai Engineering Research Center of Aquatic Product Processing & Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
Review On Ice Crystal Shape And Assisted Freezing Methods Of Quick-Frozen Food, Chen Cong, Yang Dazhang, Xie Jing
Food and Machinery
In this paper, the food quick-freezing technology, the shape of ice crystal at different freezing rates and methods for observing ice crystals are described. The research progress of pressure-assisted freezing, electrostatic-assisted freezing and magnetic-assisted freezing in recent years is reviewed. The direct method can directly observe the ice crystal formed during the freezing process. The indirect method analyzes the ice crystal characteristics by observing the gap left by the ice crystal in the food after freezing. Pressure-assisted freezing can improve the super-cooling degree. When the pressure is released, the ice crystals formed by instantaneous freezing are fine and evenly distributed. …
Research Progress Of Cold Storage Type Incubator,
2019
Shanghai Engineering Research Center of Aquatic Product Processing & Preservation, Shanghai 201306, China; College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Research Progress Of Cold Storage Type Incubator, Wang Xuesong, Xie Jing
Food and Machinery
With the development of phase change coolants and insulation technologies, it is expected that the cold storage incubators will be more economical, environmentally friendly, and durable, and have a positive impact on cold chain logistics and people's lives. Firstly, three types of organic, inorganic, and composite phase-change coolants used in cold storage incubators, as well as new cold storage agents such as microcapsule cold storage agents and nano-coolant developed in recent years were reviewed. Then, from thermal insulation materials and temperature fields, in terms of uniformity, the progress of design optimization of cold storage incubator were expounded, and the feasibility …
