Rapid Determination Of Sulfites By Microextraction-Ion Chromatography In Red Wine,
2023
Longkou Customs of the People's Republic of China, Longkou, Shandong 265700, China
Rapid Determination Of Sulfites By Microextraction-Ion Chromatography In Red Wine, Wang Zhi-Hong, Lu Fei, Ni Yong-Fu, Cao Peng, Zhang Hong-Wei
Food and Machinery
Objective: In view of the improvement of the national standard method of distillation pretreatment, combined with the advantages of ion chromatography, a rapid determination of sulfite by microextract-ion chromatography in red wine was established. Methods: Sulfur dioxide was released by microextraction device, which was absorbed by sodium hydroxide solution to form sulfite, and then oxidized to sulfate. The samples were then filtered by 0.45 μm filter and determined by ion chromatograph. Results: The concentration of sulfite ion in range of 1.0～50 mg/L showed a linear relationship with the peak area, with correlation coefficient of 0.999 9, and the detection limit …
Evaluation Of Uncertainty For The Determination Of Thiocyanate In Cheese By Inhibited Conductivity Ion Chromatography,
2023
Guangdong Academy of Sciences 〔China National Analytical Center, Guangzhou〕, Guangzhou, Guangdong 510070, China; Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology, Institute of Analysis, Guangzhou, Guangdong 510070, China; Guangdong Provincial Engineering Research Center for Efficacy Component Testing and Risk Substance Rapid Screening of Health Food, Guangzhou, Guangdong 510070, China
Evaluation Of Uncertainty For The Determination Of Thiocyanate In Cheese By Inhibited Conductivity Ion Chromatography, Pan Can-Sheng, Zhang Zhi-Zhou, Xia Bing, Zhang Fei, Wu Ping, Wu Ling-Tao
Food and Machinery
Objective: To evaluate the uncertainty of the determination of thiocyanate in cheese by inhibition conductance ion chromatography. Methods: The content of thiocyanate in cheese was determined by inhibition conductance ion chromatography and a mathematical model was established. The source of uncertainty introduced in the process of the experiment was described, and the synthetic uncertainty was calculated for each uncertainty component. Results: The determination of thiocyanate was （10.2±0.56） mg/kg, k=2, p=95%. Conclusion: The uncertainty in the measurement process mainly comes from the concentration of thiocyanate in the test solution, followed by sample recovery and repeatability experiments.
Quality Change Of Prawn During Low-Frequency Electric Field Ice Temperature Storage,
2023
Department of Food and Environmental Engineering, Yangjiang Polytechnic, Yangjiang, Guangdong 529566, China; Guangdong Provincial Engineering and Technology Research Center of Food Low Temperature Pocessing of Guangdong Provice, Yangjiang, Guangdong 529566, China; Yangtze Delta Region Institute of Tsinghua University, Jiaxing, Zhejiang 314006, China
Quality Change Of Prawn During Low-Frequency Electric Field Ice Temperature Storage, Yu Ming, Xu Li-Juan, Chen Hai-Qing, Liang Zuan-Hao, Chen Shan-Shan, Liang Feng-Xue, Ao Fei-Fei
Food and Machinery
Objective: This study aimed to explore the feasibility of low-frequency electric field assisted controlled freezing-point storage (CFPS) technology improving the quality of shrimp. Methods: Low-frequency electric field was applied on the basis of controlled freezing-point storage (LFEF+CFPS) to preserve prawns, and the contents of malondialdehyde and salt soluble protein, as well as the changes of Ca2+-ATPase activity, pH value, shear force, color difference and protein molecular weight of prawns were monitored. Results: Compared with the conventional CFPS, the LFEF+CFPS had no significant effect on the content of malondialdehyde, salt-soluble protein, pH, shear force and color of prawn meat. …
Preparation Of Antioxidant Hydrolysate Of Agaricus Blazei Murill,
2023
Fuzhou University Zhicheng College, Fuzhou, Fujian 350102, China
Preparation Of Antioxidant Hydrolysate Of Agaricus Blazei Murill, Chen Zhuo-Juan, Ke Xiu-Xian, Huang Xiao
Food and Machinery
Objective: This study aimed to investigate the technological conditions for the preparation of antioxidant hydrolysate of Agaricus blazei Murill and analyze the nutritional components of the hydrolysate. Methods: Papain, cellulase and pectinase were prepared in mpapain∶mcellulase∶mpectinase ratio of 3∶4∶4 to dissolve the fruiting bodies of A. blazei. Response surface test was used to optimize the enzymatic hydrolysis process of A. blazei. Results: The optimal conditions of compound enzyme hydrolysis were as follows: compound enzyme dosage 0.5%, pH 6.2, hydrolysis temperature 49 ℃, hydrolysis time 147 min. Under these conditions, when the concentration of A. blazei …
The Reflection And Reconstruction Of The Penalty Exemption List System In The Field Of Food Safety,
2023
Law School of Guangxi University, Nanning, Guangxi 530004, China
The Reflection And Reconstruction Of The Penalty Exemption List System In The Field Of Food Safety, Lin Ke-Liang, Mo Chen-Yu, Yang Hai
Food and Machinery
Current food safety penalty list positioning fuzzy, content reiterated a lot of the current legislation, to avoid the defects of food safety substance problems. The reason is that the administrative law enforcement excessive list penalty for food safety risk, thus adopted a negative avoidance attitude. It is not only conducive to optimize the business environment, but also will cause adverse effects on food safety in a long-term view. In essence, the formulation of the exemption list is still administrative activities rather than legislative activities. The reconstruction of the food safety exemption list system should replace the current legislation in terms …
Design And Experiment Of Multi-Station Automatic Powder Loading System Based On Fuzzy Control,
2023
Electronic Engineering College, Guangxi Normal University, Guilin, Guangxi 541004, China; Teachers College for Vocational and Technical Education, Guangxi Normal University, Guilin, Guangxi 541004, China
Design And Experiment Of Multi-Station Automatic Powder Loading System Based On Fuzzy Control, Mou Xiang-Wei, Nan Xiang-Gang, Yu Xin-Ye, Chen Lin-Tao
Food and Machinery
Objective: In view of the technical problems such as low efficiency and difficult automatic control of the automatic powder production line for factory rice noodle production. Methods: This research proposed a multi-station automatic powder loading system based on fuzzy control, selecting the deviation E1 between the detected value of the powder height and the preset value, the deviation change rate EC1 and the deviation between the current position of the powder loading car and the position to be loaded. The absolute value E2 was used as the input variable, and the motor speed U1 and the …
Three-Dimensional Flow Field Analysis Of A Progressively Accelerating Single Screw With Kneading Blocks,
2023
College of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China
Three-Dimensional Flow Field Analysis Of A Progressively Accelerating Single Screw With Kneading Blocks, Tian Dong, Guo Shu-Guo, Wang Li-Yan
Food and Machinery
Objective: In order to improve the mixing performance and work speed of a single screw extruder increase. Methods: A coaxial gradual acceleration single screw using planetary wheel assemblies and mixing elements was designed. Using ansys/cfx to conduct the three-dimensional flow field analysis of the flow channel, the macro pressure field, speed vector diagram, speed streaming diagram and axial speed changes, were finished, which was compared to the only traditional pillar. Results: As the speed of the pillar continues to increase, the time for the material to stay in the barrel becomes shorter, and the extrusion efficiency of the gradual acceleration …
Full-Life Fatigue Analysis Of Vertical Retort Based On Fracture Mechanics,
2023
School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048, China
Full-Life Fatigue Analysis Of Vertical Retort Based On Fracture Mechanics, Liu Jin-Peng, Zhang Li-Mei, Huang Zhi-Gang
Food and Machinery
Objective: The fatigue strength of a new type of vertical retort under the cyclic load of heat engine was studied, especially the residual fatigue life of the pot body after the crack appeared and the factors affecting the fatigue crack propagation of the germicidal pot. Methods: The mechanical characteristics of retort under sterilization and three kinds of cyclic loads were analyzed by Workbench, the design fatigue life of the retort under three alternating stresses was studied based on the S-N curve. The effect of the initial crack size, pressure and temperature on the stress strength factor and residual fatigue life …
Simulation Study Of Factors Influencing Oil Yield During Cold Pressing Of Rapeseed,
2023
School of Mechanical Engineering, Wuhan Light Industry University, Wuhan, Hubei 430023, China
Simulation Study Of Factors Influencing Oil Yield During Cold Pressing Of Rapeseed, Huang Tao, Song Shao-Yun, Zhang Heng, Yin Fang
Food and Machinery
Objective: This study aimed to investigate the factors influencing the oil yield of rapeseed during pressing in a double screw oil press. Methods: To simulate the pressing process of rapeseed and to explore the effects of two factors, the speed of the press screw and the porosity, on the oil yield. Results: The oil yield of rapeseed was linearly related to the porosity, and a larger porosity, was associated with a lower oil yield. Moreover, the oil yield was negatively related to the speed of the press screw. Conclusion: The oil yield of rapeseed was highest when the porosity was …
Determination Of Discrete Element Simulation Parameters Of Rice Milling Machine,
2023
School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
Determination Of Discrete Element Simulation Parameters Of Rice Milling Machine, Zhang Ning, Cao Xian-Zhou, Wang Xin-Yu, Sun Yan-Ling
Food and Machinery
Objective: To solve the problem that the roller is inconvenient to operate and the concept of rolling friction coefficient and sliding friction coefficient is confused. Methods: EDEM software was used to simulate the white milling process. Taking MNAW18 rice mill as a reference and taking Feng Liangyou series brown rice as a sample, a set of method for measuring discrete element simulation parameters of rice mill was established by independently setting up an experimental bench and combining with simulation calibration. Results: Using the self-made collision coefficient experimental device and video motion processing software, the collision recovery coefficients between brown rice …
Design Of Real-Time Detecting System For Grain Moisture In Dryer,
2023
School of Electrical Engineering and Automation, Anhui University, Hefei, Hunan 230601, China
Design Of Real-Time Detecting System For Grain Moisture In Dryer, Hu Yong, Jiang Yong-Cheng
Food and Machinery
Objective: To reduce grain mildew caused by high water content in storage. Methods: The function model of water content and detection frequency is determined by data measurement in multiple sites. A real-time monitoring system of grain moisture value in the dryer was designed based on STM32 microcontroller. Through the design of parallel plate sensor to detect the change value of capacitance of grain with different moisture content, through the hardware circuit to convert the capacitance value into frequency value. Through the single-chip microcomputer calculation can get the real-time moisture content of grain inside the dryer, and then through RS485 communication …
Finite Element Analysis Of Box Grid Magnetic Iron-Separator And Its Application In Milk Powder Production,
2023
Key Laboratory for Food Science and Engineering, College of Food Engineering, Harbin University of Commerce, Harbin, Heilongjiang 150076, China; Heilongjiang Feihe Dairy Co., Ltd., Qiqihar, Heilongjiang 161005, China
Finite Element Analysis Of Box Grid Magnetic Iron-Separator And Its Application In Milk Powder Production, Cheng Jian-Bo, Chen Bao-Ku, Li Hui, Guo Lin, Wang Yan, Sun Li-Rui
Food and Machinery
Objective: The optimal design scheme of box grid magnetic iron-separator in milk powder production process was explored. Methods: In this study, the working principle of the box grid magnetic iron-separator was explored by using the finite element simulation analysis method under real production conditions in a fully simulated milk powder plant. Through the single factor test, the effects of material drop height, the type of metal foreign matter, the field strength, and the net distance of the magnetic bar on the effective interception rate of the box grid magnetic iron-separator were explored, and the design solution was optimized by using …
Effect Of Antifreeze On The Quality Of Cooked Crawfish Tail Meat After Freeze-Thawed,
2023
College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
Effect Of Antifreeze On The Quality Of Cooked Crawfish Tail Meat After Freeze-Thawed, Hu Xiao-Bo, Chen Wen-Fei, Gu Ze-Mao, Zhou Sheng-Bi, Xiong Shan-Bai, Hu Yang
Food and Machinery
Objective: The study aimed to improve the storage quality of frozen cooked crawfish tail meat. Methods: Crawfish tail meat were immersed in different proportions of complex phosphate, trehalose and sorbitol antifreeze agents. The thawing loss rate, water content and distribution, water retention, salt-soluble protein, total thiol content, texture properties of crawfish tail meat after freeze-thawed were measured, and the microstructure changes were observed to evaluate the effect of each antifreeze agent. The antifreeze agent with better effect was selected as horizontal factor to design orthogonal experiment, so as to optimize the appropriate recipe of antifreeze agents. Results: 1.5% complex phosphate, …
The Effect Of Slaughtering Methods On The Muscle Quality Of Eels,
2023
College of Biological Science and Technology, Hubei Minzu University, Enshi, Hubei 445000, China;Key Laboratory of Agricultural Products Cold Chain Logistics, Ministry of Agriculture and Rural Affairs, Institute of Agro-Products Processing and Nuclear Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, Hubei 430064, China
The Effect Of Slaughtering Methods On The Muscle Quality Of Eels, Yang Li-Feng, Mao Shu-Can, Wang Lan, Li Ping, Zhou Zhi, Xiong Guang-Quan, Shi Liu
Food and Machinery
Objective: This study aimed to investigate the effect of slaughtering methods on the muscle quality of eels. Methods: Two slaughtering methods （including mechanical slaughter and manual slaughter） were used to analyze the energy metabolism and physicochemical properties of eel meat slices during storage. Results: Duringstorage at 4 ℃ for 48 h, the glycogent and lactic acid content of eelfillets subjected to mechanical slaughter were lower than those of manual slaughtered samples generally. During 7 d-storage, the sensory deterioration of eel meat samples was retarded by mechanical slaughter, and the TVB-N and TBARS content were lower than those of manual slaughtered …
Cherry Defect And Classification Detection Based On Improved Yolox Model,
2023
Beidou High Precision Positioning Service Technology Engineering Laboratory of Liaoning Province, Dalian University, Dalian, Liaoning 116622, China; Environment Sensing and Intelligent Control Key Laboratory of Dalian, Dalian University, Dalian, Liaoning 116622, China
Cherry Defect And Classification Detection Based On Improved Yolox Model, Liu Jing-Yu, Pei Yue-Kun, Chang Zhi-Yuan, Chai Zhi, Cao Pei-Pei
Food and Machinery
Objective: In order to expand the scope of cherry sales and achieve rapid grading of cherries under industrial conditions. Methods: Firstly, the YOLOX network was used to detect the defective fruit, in order to solve some problems where the defect was not obvious. The detection accuracy of the inconspicuous defect was improved by setting the appropriate fusion factor for the feature pyramid network, and in order to solve the problem of imbalance between various types of real samples, Focal Loss was integrated into the loss function. Then, the intact fruit was graded using the YOLOX network, and the attention mechanism …
Defect Detection Method Of Red Globe Grapes Bunches Based On Near Infrared Camera Imaging,
2023
Qingdao University of Technology, School of Information and Control Engineering, Qingdao, Shandong 266520, China
Defect Detection Method Of Red Globe Grapes Bunches Based On Near Infrared Camera Imaging, Gao Sheng
Food and Machinery
Objective: The study aimed to explore a fast and accurate method to detect brown spot and damage decay in grape bunches. Methods: Colour images （RGB） and near-infrared images （NIR） of red globe grapes bunches were captured by a near-infrared industrial camera. The edges of the samples and the edges of the defective parts were first extracted by applying the Sobel algorithm to the NIR images （NIR）, and then the images were binarized by the adaptive thresholding algorithm to achieve the segmentation of the images. Then the sample edges and fruit stalks were removed by the normalized supergreen method and the …
Research Status Of Zmnthoxylum Schinifolium Sieb. Et Zucc Preservation Technology,
2023
The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou 550025, China; School of Public Health, Guizhou Medical University, Guiyang, Guizhou 550025, China
Research Status Of Zmnthoxylum Schinifolium Sieb. Et Zucc Preservation Technology, Liu Hui-Juan, Cai Si-Jin, Xie Jiao
Food and Machinery
This paper reviewed the changes of main components such as chlorophyll, volatile oil, numbness substances and amide substances related to the quality deterioration of Zmnthoxylum schinifolium Sieb. et Zucc during storage. The fresh-keeping technologies of Zmnthoxylum schinifolium Sieb. et Zucc, such as high-temperature steam instantaneous treatment, air-conditioned refrigeration and chemical reagent treatment, were analyzed, and it was pointed out that the comprehensive fresh-keeping technology combining various fresh-keeping methods could be studied in the future.
Optimization Of Ultra-High Pressure Extraction Technology Of Polysaccharide From Dendrobium Officinale And Its Antioxidant Activities,
2023
College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Optimization Of Ultra-High Pressure Extraction Technology Of Polysaccharide From Dendrobium Officinale And Its Antioxidant Activities, Meng Ji-Kun, Zhang Nan, Wu Hao, Zhang Xiu-Qing
Food and Machinery
Objective: Optimizing the extraction conditions of polysaccharides from Dendrobium officinale under ultra-high pressure, improving the yield of polysaccharides, and studying its basic properties and antioxidant activity in vitro. Methods: Using D. officinale dry powder as raw material, orthogonal experiment was used to optimize the extraction conditions of polysaccharide from D. officinale by ultra-high pressure technology. The relative molecular weight and monosaccharide composition of polysaccharides extracted from D. officinale by traditional hot water extraction method and ultra-high pressure extraction method were determined, and their antioxidant activities in vitro were compared. Results: Under the optimal conditions of 200 MPa, solid-liquid ratio of …
Anti-Inflammatory Activity Of Cili Extracts And Its Therapeutic Effect On Ulcerative Colitis Model Of Mice,
2023
State Key Laboratory of Functions and Applications of Medicinal Plants, Guiyang, Guizhou 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, Guizhou 550014, China
Anti-Inflammatory Activity Of Cili Extracts And Its Therapeutic Effect On Ulcerative Colitis Model Of Mice, Wang Li, Li Li-Lang, Li Qi-Ji, Wang Yu, Yang Xiao-Sheng
Food and Machinery
Objective: This study aimed to investigate the effect of Cili extracts in the treatment of enteritis and diarrhea. Methods: The RAW 264.7 cells were treated with different concentrations (1.25, 2.50, 5.00, 10.00, 20.00 μg/mL) of Cili extracts, and then the cell viability was determined by MTT method. RAW264.7 cells were treated with different concentrations of Cili extracts, and then lipopolysaccharide (LPS) was used to induce the cell inflammation model. The content of NO in cell culture supernatant was detected by Griess method. The UC mice model was induced by 3% DSS. The changes of signs during the modeling and drug …
Effect Of Aqueous Extract With Areca Catechu Pedicle On Mycelial Quality And Antioxidant Activity Of Three Edible Fungi,
2023
College of Forestry, Northeast Forestry University, Harbin, Heilongjiang 150040, China; Heilongjiang Key Laboratory of Forest Food Resources Utilization, Harbin, Heilongjiang 150040, China
Effect Of Aqueous Extract With Areca Catechu Pedicle On Mycelial Quality And Antioxidant Activity Of Three Edible Fungi, Bao Yi-Hong, Lai Zhang-Fei, Ma Yin-Peng, Jia Yu-Tong, Pan Fei-Bing, Kuang Feng-Jiao
Food and Machinery
Objective: In order to reuse the Areca catechu by-product—A. catechu pedicle, and improve the quality of mycelium of edible fungi, the effect of the pedicle aqueous extract on the liquid fermentation of edible fungi was investigated. Methods: Pleurotus ostreatus, Pleurotus citrinopileatus Singer, and Flammulina velutiper were selected as the test strains, and the effects of the addition of A. catechu pedicle aqueous extract on the quality of mycelium and the activity of enzymes related to the growth and metabolism of the three strains were investigated, by using mycelial growth rate, biomass, mycelial active ingredients and antioxidant activity as indicators. Results: …
