The Effect Of Ph And Buffer Systems On The Inhibition Of Lipoxygenase Activity By Plant Polyphenols,
2021
College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
The Effect Of Ph And Buffer Systems On The Inhibition Of Lipoxygenase Activity By Plant Polyphenols, Ye Feng-Ling, Jia Li-Rong, He Qiang, Dong Yi
Food and Machinery
In order to optimize the Ultraviolet (UV) spectrophotometric method for determination of polyphenols inhibiting LOX activity, and to explore the influences of the buffer systems and pH on LOX enzyme activity and polyphenol auto-oxidation, this paper studied the changes of LOX enzyme activity and the auto-oxidation of gallic acid, quercetin, catechin and 3,4-dihydroxyphenylacetic acid under different buffer systems and pH conditions. The results showed that the activity of LOX was stronger under alkaline conditions, and the 4 polyphenols had the weakest self-oxidation in the borate system and the strongest self-oxidation in the Tris-HCl system. The higher the pH in each …
Rheological Properties Of Fenugreek Gum On Improving The Safety Of Drinking Water In Nursing Dysphagia,
2021
College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
Rheological Properties Of Fenugreek Gum On Improving The Safety Of Drinking Water In Nursing Dysphagia, Hao Lu-Lu, Wang Ling, Shang Long-Chen, Li Bin
Food and Machinery
In this paper, according to the American Dysphagia Diet standard, based on the viscosity at 50 s-1, fenugreek gum was prepared into thickening fluids with viscosity of 180 cP(nectar),1 000 cP(honey) and 2 500 cP(pudding), that the rheological properties had been systematically studied to evaluate the potential of fenugreek gum in improving the safe drinking water of patients with dysphagia. And then the rheological properties of fenugreek gum prepared at different temperatures were further explored. The results showed that the dissolution temperature was the key to whether the rheological properties of fenugreek gum meet the requirements of drinking …
Fluorescence Aptasensor Detection Of Chloramphenicol Based On Mno2 Nanosheet And Exo-I,
2021
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Fluorescence Aptasensor Detection Of Chloramphenicol Based On Mno2 Nanosheet And Exo-I, Ma Peng-Fei, Qi Shuo, Lu Yan, Zhou You, Wang Zhou-Ping
Food and Machinery
In order to develop rapid detection method for chloramphenicol in food, in this study, a novel chloramphenicol aptasensor was constructed based on fluorescence quenching ability of MnO2 nanosheet and fluorescence amplification ability of Exo-I digestion. Results showed that under optimal fluorescence detection conditions of 50 nmol/L concentration of aptamer, 0.05 mg/mL concentration of MnO2 nanosheet, 0.4 U/μL concentration of Exo-I and Exo-I digestion time of 50 minutes, and the fluorescence intensity had a good linear relationship with the concentration of chloramphenicol (R2=0.995). The linear range of detection was 0.1~80.0 nmol/L with the detection limit of 0.08 …
Determination Of Total Fluorine In Tea By Nuclear Magnetic Resonance Spectroscopy Combined With Oxygen Bomb Combustion,
2021
Hubei Provincial Institute for Food Supervision and Test, Wuhan, Hubei 430075, China; Hubei Provincial Engineering and Technology Research Center for Food Quality and Safety Test, Wuhan, Hubei 430075, China
Determination Of Total Fluorine In Tea By Nuclear Magnetic Resonance Spectroscopy Combined With Oxygen Bomb Combustion, Zhou Mi, Han Zhi, Zhu Zheng-Wei, Zhu Song-Song, Wang Hui-Xia, Jiang Feng, Zhu Qian
Food and Machinery
Quantitative analysis of total fluorine in tea was established by using 19F quantitative nuclear magnetic resonance combined with the pretreatment method of oxygen bomb combustion. The 19F qNMR method used the signal characteristic of fluoride ion at δ=-119 as the qualitative peak and the signal characteristic of trifluoroacetic acid at δ=-75 as the internal standard peak. The fluorine-containing substances in tea sample was burned by oxygen bomb and converted into inorganic fluorine. Mixed metal chelating agent which included sodium citrate and disodium EDTA was added to eliminate interference and then the absolute content of fluoride ion in tea …
Detection Of Foodborne Pathogenic Bacteria Based On Hyperspectral Imaging,
2021
College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Fujian Colleges and Universities Engineering Research Center of Modern Agricultural Equipment, Fuzhou, Fujian 350002, China
Detection Of Foodborne Pathogenic Bacteria Based On Hyperspectral Imaging, Duan Peng-Sheng, Xu Jin-Chai, Chen Yi-Lei, Ye Da-Peng, Weng Hai-Yong
Food and Machinery
Aiming at the problem of foodborne pathogenic bacteria detection process is time-consuming, composed a application highlights like technology obtained 12,18,24 h 3 phase 5 kinds of pathogenic bacteria [Staphylococcus aureus (S. aureus), Listeria monocytogenes (LM), Diarrheagenic e.coli (DEC), Salmonella enteritidis (SE) and Shigella spp flexneri (S. flexneri)] of hyperspectral image, using successive projections algorithm (SPA) in combination with relevant analysis (CA) to extract various growing pathogenic bacteria sensitive wave bands and established the least squares support vector machines (LS-SVM) discriminant model. The results showed that the reflectivity of the five types of pathogens to different wavelengths of light was different. …
Administrative Supervision System Of Internet Food Trade In Germany And The Enlightenment To China,
2021
CPC Liaocheng Party School, Liaocheng, Shandong 252000, China
Administrative Supervision System Of Internet Food Trade In Germany And The Enlightenment To China, Shao Ru-Hua
Food and Machinery
The administrative supervision system for online food trade in Germany was built by German Federal Consumer Protection and Food Safety Office mainly based on 《German Food, Commodity and Feed Law》and other relevant laws and regulations, the German official monitoring center of e-commerce in food and D21 Quality Criterion. From the perspective of German mature administrative supervision system for online food trade, China has not yet set up an administrative agency which unifies and coordinates organization for online food safety, a unified operation platform for the administrative supervision of online food trade and a widely acknowledged quality certification criterion. Therefore, establishing …
Uncertainty Evaluation For Determination Of Free Gossypol In Vegetable Oil By High Performance Liquid Chromatography,
2021
Jinan Center for Food and Drug Control, Jinan, Shandong 250102, China
Uncertainty Evaluation For Determination Of Free Gossypol In Vegetable Oil By High Performance Liquid Chromatography, Long Jin-Lin, Wang Chun-Lin, Tao Yin-Feng, Sun Xiao-Han, Li Shuo
Food and Machinery
According to the detection method of free gossypol in vegetable oil，this paper establishes a mathematical model of uncertainty evaluation for determination of free gossypol in vegetable oil . The main sources of uncertaintyin measurement arising from procedure of testing were analyzed and evaluated. The evaluation results showed that the fitting of standard curve, the performance of liquid chromatograph and the repeatability of sample pretreatment made great contribution to the uncertainty of free gossypol detection results. When the content of free gossypol in edible oil was 48 mg/kg, the expanded uncertainty was 5 mg/kg (k=2).
Comprehensive Evaluation Model Of Heavy Metal Pollution In Meat Products Based On Best-Worst Method And Entropy Method,
2021
Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing Technology and Business University, Beijing 100048, China
Comprehensive Evaluation Model Of Heavy Metal Pollution In Meat Products Based On Best-Worst Method And Entropy Method, Wang Xian-Fa, Chen Yi, Sun Yue-Hong
Food and Machinery
In order to evaluate the degree of heavy metal (Cd, Cr, Pb, As) pollution in different meat products and different regions comprehensively and quantitatively, a comprehensive evaluation method of heavy metal pollution in meat products based on the best-worst method (BWM)-entropy(E) model was proposed. Firstly, Building a comprehensive evaluation index system based on heavy metal toxicity and content. Then, the best-worst method was applied to evaluate the degree of heavy metal pollution in various meat products. Finally, the entropy method was used to comprehensively evaluate the degree of heavy metal pollution in different regions. The case study used in this …
International Experiences And Inspirations Of Dairy Product Safety And Quality Supervision,
2021
Nanchang Jiaotong Institute, Nanchang, Jiangxi 330100, China
International Experiences And Inspirations Of Dairy Product Safety And Quality Supervision, Zhang Li-Ping
Food and Machinery
At present, the quality and safety supervision of dairy products in China are facing many challenges. Some successful experiences and advanced technologies in dairy product quality and safety supervision, safety risk assessment, quality standards and safety standards, management mode, and the examination system of in developed countries, such as Europe and the United States, were reviewed. It was concluded that, to improve the Chinese dairy products quality and safety supervision system, the integrated use of economic, administrative and legal means should be used to strengthen the macro-control. Moreover, strategies including constructing a safety-oriented inspection and testing system, speeding up technical …
Conjugate Tooth Profile Solution And Meshing Analysis Of Harmonic Drive Based On Envelope Theory,
2021
Key Laboratory of Advanced Food Manufacturing Equipment Technology, Wuxi, Jiangsu 214122, China; School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
Conjugate Tooth Profile Solution And Meshing Analysis Of Harmonic Drive Based On Envelope Theory, Li Peng-Chao, He Xue-Ming, Lu Li-Xin, Lin Zi-Dong
Food and Machinery
In order to solve the problem of complex derivation of conjugate tooth profile in harmonic drive, a method based on the trajectory envelope of flexspline is used to solve the conjugate tooth profile, and the different tooth height along the axial direction of the flexspline profile is adjusted to avoid interference between the flexible gear and the conjugate steel gear. In order to analyze the influence of tooth root circle radius and torque on the stress of flexspline, a multi-body contact model was established by ANSYS Workbench to explore the influence of root circle radius and torque on the stress …
Anomaly Vibration Detection Method Of The Refrigeration Compressor Based On Autoencoder,
2021
School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048, China
Anomaly Vibration Detection Method Of The Refrigeration Compressor Based On Autoencoder, Wang Yuan-Tao, Feng Tao, Sun Qia, Wang Jing, Wang Yi-Han
Food and Machinery
The compressor is the core component of refrigeration equipment. This paper proposeed a method of anomaly vibration detection of refrigeration compressor based on autoencoder technology in order to solve the quality control problems in the production process of refrigeration compressor. The principle and process of anomaly vibration detection were given, based on autoencoder and the acquisition method of compressor vibration signal sample. The relationship was studied between the mean square error of the input and output of the autoencoder and the distribution of the signal samples. By means of the autoencoder model, the decision fundament of the abnormal vibration of …
Dynamic Performance Analysis Of The Herringbone Transmission System Of Konjac Fine Flour,
2021
School of Mechanical and Engineering, Qiqihar University, Qiqihaer, Heilongjiang 161006, China; Heilongjiang Province Collaborative Innovation Center for Intelligent Manufacturing Equipment Industrialization, Qiqihaer, Heilongjiang 161006, China
Dynamic Performance Analysis Of The Herringbone Transmission System Of Konjac Fine Flour, Hu Qing-Ming, Hou Jun-Peng, Xu Chang-Shun, Sun Dan-Dan, Yang Ming, Bai Song, Guo Jian-Hua
Food and Machinery
Taking the fourth-stage transmission system of the konjac flour machine as the research object, a multi-body dynamic model was established based on the straight tooth synchronous belt and double helical synchronous belt with new profile, and the influence of the tooth line shape on the belt tooth stress and system vibration was analyzed. Then the influence of the structural parameters of the helix angle and the dislocation coefficient between the teeth on the dynamic performance of the transmission system were investigated. The results showed that when the toothed helix angle β was 30° with the inter-tooth dislocation coefficient k of …
Improvement On Cigarette Guide Plate Device Of Yj19 Cigarette Maker,
2021
Tongren Cigarette Factory of Guizhou China Tobacco Industry Co., Ltd., Tongren, Guizhou 554300, China
Improvement On Cigarette Guide Plate Device Of Yj19 Cigarette Maker, Wu Shu-Qing, Sun Yong, Yang Fang, Huang Xue-Yan
Food and Machinery
In order to solve the problem of water pollution and cigarette wrinkle at the cigarette guide plate device of YJ19 Cigarette Maker, the structure of the cigarette guide plate device was improved by combining the arc groove with the air suction hole. The cigarette transferring mode was changed from closed type to open type, and then the results were validated. The experiment results showed that the unclean defect rate of cigarette lap was reduced from 1.45% to 0, and the wrinkle defect rate of cigarette decreased from 1.16% to 0.30%. The quality of cigarettes has been improved.
Development Of A Continuous Laser Scanning Electromechanical System For Brown Rice Profile Cross Section,
2021
School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048, China
Development Of A Continuous Laser Scanning Electromechanical System For Brown Rice Profile Cross Section, Yang Si-Ping, Tang Xiao-Hua, Li Tian-Jiao, Zheng Long-An, An Jia-Qiang
Food and Machinery
A laser scanning contour measuring device for brown rice was developed. The mechanism principle of the device was adapted to the point cloud data collection representing the geometric characteristics of brown rice. It has the functions of mutually vertical triaxial movement and two-axis rotation to realize the circular sweep of the ellipsoid of brown rice, the deflection of the embryo and the linear sweep of its main section. The ellipsoid of brown rice was measured by circular discrete and continuous laser scanning. The results showed that the continuous and discrete scanning data were consistent in describing the surface of brown …
Flat Design Process Of Cocktail Packaging Based On The Whole Life Cycle Concept,
2021
School of Packaging Design & Art， Hunan University of Technology, Zhuzhou, Hunan 412007, China
Flat Design Process Of Cocktail Packaging Based On The Whole Life Cycle Concept, Liu Zong-Ming, Li Chun-Ping, Chen Wei
Food and Machinery
Combined with the concept of flat and the concept of full life cycle, the whole life cycle of cocktail packaging was proposed. Through the analysis of typical design cases, the whole life cycle of flat cocktail packaging was explained, and a complete design process of flat cocktail packaging was constructed. Taking the design of self-created cocktail brand as an example, the flat design process was verified experimentally. The results show that the flat design process is helpful for designers to judge and design flat packaging in the whole life cycle.
Analysis Of Tea Brand Packaging The Visual Expression From The Perspective Of Cultural Gene,
2021
School of Art and Desing, Changsha University of Seience and Technology, Changsha, Hunan 410114, China
Analysis Of Tea Brand Packaging The Visual Expression From The Perspective Of Cultural Gene, Xie Qi, Xu Xin-Yi
Food and Machinery
From the perspective of design, the cultural gene method was introduced to collect and sort out The Tea Road cultural gene. The tea brand packaging of The Tea Road in Hunan and Hubei was used as an example, the application types and the visual expression in its design were analyzed. Our study would provide new ideas for the packaging design of different tea brands.
International Experience And Enlightenment Of The Guiding Stars Front Of Package Labeling,
2021
Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
International Experience And Enlightenment Of The Guiding Stars Front Of Package Labeling, Huang Ze-Ying, Huang Bei-Xun
Food and Machinery
This study elaborated nutritional evaluation algorithm and its characteristics, the promotion, the product search database, publicity and education activities, implementation effect of Guiding Stars labeling, summarized three enlightenments for Chinese enterprises to enter the field of FOP labeling certification, and put forward policy suggestions to promote enterprises to carry out FOP labeling certification.
Effect Of Storage Conditions On Protein Quality Of Walnut Kernel,
2021
School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
Effect Of Storage Conditions On Protein Quality Of Walnut Kernel, Peng Wu, Wang Wei-Qing, Wang Ping, Yu Xiong-Wei, Fu Qing-Li, Li Shu-Gang
Food and Machinery
Walnut kernel was used to research the influence of temperature and vacuum degree on its protein structure and function properties. The results showed that the quality of walnut kernel protein was significantly affected by factors of temperature and vacuum, and the influence degree of these factors was valued as: temperature > vacuum, constant temperature (35 ℃) > room temperature (25 ℃)> refrigeration (4 ℃). Moreover, with the extension of storage time, the content of sulfhydryl groups in walnut kernel protein decreased, and the content of disulfide bonds and carbonyl compounds increased. The results obtained from electrophoresis and infrared analyses indicated that the …
Study On Drying Characteristics And Drying Kinetic Model Of Kiwi Fruit Slices In Fluidized Bed,
2021
Kunming University of Science and Technology, Mechanical and Electrical Engineering, Kunming, Yunnan 650500, China
Study On Drying Characteristics And Drying Kinetic Model Of Kiwi Fruit Slices In Fluidized Bed, Zou San-Quan, Liu Xian-Xi, Zhao Zhen-Chao, Zhang Xue-Bo
Food and Machinery
In order to improve the drying quality and shorten the drying time of kiwifruit slices, the effects were studied in different temperatures (55, 65, 75, 85 ℃), wind speed (1.5, 2.5, 3.5, 4.5 m/s) and thickness (5, 10, 15 mm) on the hot air drying curve, water effective diffusion coefficient and drying activation energy of kiwifruit slices. The results showed that the whole drying process of kiwifruit slices belonged to reduced-speed drying, and the effective water diffusion coefficient was 1.296 39×10-9 ~4.589 94×10-9 m2/s, which increased with the increase of temperature and wind speed, and decreased with the …
Preparation Of Catalyst Cu/Ce0.75Zr0.25O2 And Its Catalytic Performance In Dry Reforming Of Ethanol,
2021
Hunan Normal University, Changsha, Hunan 410081, China
Preparation Of Catalyst Cu/Ce0.75Zr0.25O2 And Its Catalytic Performance In Dry Reforming Of Ethanol, Huang Jia-Miao, Li Liang-Yi, Cao Dong, Huang Zhong-Pei
Food and Machinery
Cu/Ce0.75Zr0.25O2 catalysts was prepared by urea co-precipitation with assistant of microwave. The activity and stability of the catalyst for ethanol dry gas reforming was studied. The result showed that the Cu/Ce0.75Zr0.25O2 catalyst possessing high catalytic activity. The activity increased with the rising of the reaction temperature. The catalyst stayed stable under 750 ℃ during the 90-hour reaction process and the conversion factor of ethanol remained 100%.
