Determination Of Nitrite In Food Using Pt—Fe(Iii)/Mwcnts Modified Electrodes By Voltammetry Measurement,
2015
Department of Environmental and Chemical Engineering, Tangshan College, Tangshan, Hebei 063000, China
Determination Of Nitrite In Food Using Pt—Fe(Iii)/Mwcnts Modified Electrodes By Voltammetry Measurement, Hao Yucui
Food and Machinery
The platinum particles-Fe(III) and multi-walled carbon nanotubes (MWCNTs) modified glassy carbon electrodes(Pt—Fe(Ⅲ)/MWCNTs/GCE) were prepared by drop coating and electrochemical deposition. The electrocatalytic property of Pt—Fe(Ⅲ)/MWCNTs/GCE on NO2- were studied, the experimental conditions were optimized and a differential pulse voltammetric method for determining NO2- was established．The oxidation peak current of NO2- is proportional to the concentration of NO2- over the range of 3.0×10-7～2.0×10-3 mol/L with the detection limit of 1.0×10-7 mol/L (r = 0.999 3). The method was applied to the determination of NO2- in food, and …
Determination Of Amylose And Amylopectin In Mung Bean By Dual-Wavelength Spectrophotometry,
2015
School of Food Science, Guangdong Pharmaceutical University, Zhongshan, Guangdong 528458, China
Determination Of Amylose And Amylopectin In Mung Bean By Dual-Wavelength Spectrophotometry, Huang Jianrong, Wang Zhijiang, Li Lichang, Oul I, Xu Jinrui
Food and Machinery
A method for the determination of amylose and amylopectin content in mung bean was established based on dual-wavelength spectrophotometry. The factors influencing the photometric absorption were also investigated. The precision of the method and the recovery of standard addition were investigated as well. The determination and reference wavelength of amylose were 610 nm and 498 nm, respectively, and that of amylopectin were 553 nm and 709 nm, respectively. The precision of the method was appropriate. The average recovery of amylose and amylopectin were 94.10% and 90.94%, respectively. The regression equation was established to calculate the amylose and amylopectin content in …
Uncertainty Evaluation On Determination Of P-Hydroxy Benzoic Acid Ethyl Ester In Edible Betel Nut By Gas Chromatography Mass Spectrometry,
2015
Xiangtan Institute for Food and Drug Control, Xiangtan, Hunan 411100, China
Uncertainty Evaluation On Determination Of P-Hydroxy Benzoic Acid Ethyl Ester In Edible Betel Nut By Gas Chromatography Mass Spectrometry, Chen Xingying
Food and Machinery
To analyze the uncertainty evaluation of measurement results for p-hydroxy benzoic acid ethyl ester in edible betel nut by Gas chromatography mass spectrometry, the various factors were found, which affected uncertainty according to JJF 1059.1-2012 Evaluation and Expression Uncertainty in Measurement, and evaluated the synthetic uncertainty and expanded it, gave the uncertainty range of the measured value. It was provided support for methods discussing and evaluation on test reports. It is showed that three kind of factorshave significant contribution to the uncertainty synthesis, such as recovery factor, gas chromatography mass spectrometry and measurement repeatability.
Detection And Classification Of Chinese Rice Wine With Different Wine Age By Znose,
2015
School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
Detection And Classification Of Chinese Rice Wine With Different Wine Age By Znose, Zhang Zhen, Li Zhenfeng, Song Feihu, Li Jing, Xu Wanxiu
Food and Machinery
Wine age is one of the main indicators of Chinese rice wine in quality. There are many limits in time and place about chromatograph and spectrograph. Surface Acoustic Wave zNose can distinguish Chinese rice wine of different wine age real time, on-the-spot and on-line monitoring. GuYueLongShan Chinese rice wines which belong to different category were sampled. Data were analyzed by principal component analysis and discriminant function analysis, where 100% classification was achieved. The correlation coefficient of characteristic peak aera and regression equation were better, which were 0.990 2, 0.994 3, 0.987 6 respectively. The linear regression model could also distinguish …
Analysis And Evaluation On Heavy Metal Content Of Root Vegetables In Three Gorges Reservoir,
2015
School of Life Science and Engineering, Chongqing Three Gorges University, Chongqing 404000, China
Analysis And Evaluation On Heavy Metal Content Of Root Vegetables In Three Gorges Reservoir, Qin Longbing, Li Zuxiang, Yang Yurong, Xiang Yanjun, Gou Tianpeng, Tang Huali
Food and Machinery
In order to evaluate the heavy metal contamination and the safe levels of vegetables, Six root vegetables in hinterland of reservoir area were detected by microwave digestion-flame atomic absorption spectrophotometer, the pollution of Pb, Cd, As, Sn, Cu and Cr in vegetables was evaluated by single pollution index and comprehensive pollution index. The result showed that the content of As, Sn and Cr in root vegetables on selling exceeded the standard, and were over the standard 27.08%, 12.50% and 8.33%, respectively. Single pollution index showed that as in carrot, Cr in carrot and radish were in the warning level, still …
Flow Characteristics Analysis And Fluid Distribution Simulation For Ion Exchange Column Using Cfd Method,
2015
Institute of Mechanical & Electrical Technology, Taizhou Vocational & Technical College, Taizhou, Zhejiang 318000, China
Flow Characteristics Analysis And Fluid Distribution Simulation For Ion Exchange Column Using Cfd Method, Lin Haibo, Pan Wangui, Wang Weiping, Ding Li, Yang Jian
Food and Machinery
Based on the numerical simulation method on computational fluid dynamics (Computational fluid dynamics, CFD), and using anion exchange resin (717) as internal chromatography media, the fluid distribution and flow resistance characteristics in ion exchange column were studied respectively. For the convenience of simulation, water was selected as feed liquid, at the flow rate of 3 m3/h, appeared laminar flow state in the exchange column. On the assumption that the fluid uniform premise, the flow resistance characteristics for the column ion exchange resin filler was simulated by the two-dimensional porous media model, and the effects of the exchange column of fluid …
Research And Simulation On Drive System Of Cam Indexers Revolving Distiller’S Yeast Press Machine,
2015
Institute of Mechanical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China; Shanxi Province Research Center for Mine Fluid Control, Taiyuan, Shanxi 030024, China
Research And Simulation On Drive System Of Cam Indexers Revolving Distiller’S Yeast Press Machine, Wei Jin, Qin Yu, Shao Liangfeng
Food and Machinery
Used the globoid indexing cam replace hydraulic motor and disc spring to control machine turntable. Determined the parameters of two levels of driving gear, and figured out resisting moment computation formula. Used Pro/E to build models and assemble, added the corresponding constraints during in Adams importing, then made a kinematics simulation. The results showed that turntable, under the globoid indexing cam controlled, can make the transmission and position integration, and the positioning error under the bounds of allowed. This paper demonstrates the feasibility of using globoid indexing cam to replace hydraulic motor control turntable, provide theoretical basis for the improvement …
Simulation And Optimization On Coaxial Treatment Chamber For Pulsed Electric Field,
2015
School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangnan 214122, China
Simulation And Optimization On Coaxial Treatment Chamber For Pulsed Electric Field, Yao Wenlong, Ping Xueliang, Hu Dahua, Jiang Yi
Food and Machinery
PEF sterilization technology is a novel non-thermal sterilization technique, the processing chamber is applied directly, for loading the material to be processed in a processing chamber and pulsed electric field. A paper designed pilot scale electrode spacing is adjustable, replaceable processing chamber cavity coaxially novel process chamber, the system established by pulsed electric fields coupled three COMSOL software mathematical model of the electric field intensity of the processing chamber, the material flow characteristics and temperature distribution, provide the basis for structural optimization coaxial treatment chamber. Simulation results show that non-uniform electric field strength at the edge of the inner circle …
Cfd Simulation Of Airflow Distribution With Different Inlets In Evaporative Condenser,
2015
Shanghai Engineering Research Center of Aquatic Product Processing & Preservation, Shanghai 201306, China; College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
Cfd Simulation Of Airflow Distribution With Different Inlets In Evaporative Condenser, Zhu Jinlin, Xie Jing, Wang Jinfeng, Du Zizheng, Zhou Hongjian
Food and Machinery
The variation of the internal temperature field and airflow field in the evaporative condenser was discussed when it was worked under an unsteady state numerical simulation by using CFD software. The performance of internal temperature field and airflow field was analyzed when the condenser worked within 5 s with different air inlet direction (single inlet, double inlets, and three inlets). The simulation results showed that when the condenser worked with single inlet, the cold airflow was easily infiltrated the bottom of the condenser horizontally, then rose and got heat exchange with coils under the effect of density difference. The condenser …
Ansys-Based Vibration Characteristic Analysis On Rotor System Of Film Dryer,
2015
College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing, Jiangsu 211816, China
Ansys-Based Vibration Characteristic Analysis On Rotor System Of Film Dryer, Li Naiyu, Li Qingsheng, Chen Guangyu
Food and Machinery
The modal analysis was carried out based on the 3D solid model of the A=0.4 m2 film dryer rotor by the ANSYS software, the first four orders of system inherent frequencies and vibration forms were initially attained, the critical speeds of main shaft were calculated; The harmonic response analysis was carried out based on the modal analysis of the rotor by the Full method, the influence of the eccentricity(c=2.5 mm) and the unbalance mass (m=0.1, 0.2 kg) on the rotor vibration were analyzed, and the bearing stiffness was changed to analyze the inherent frequency and vibration characteristic of the …
Analysis On Drying Performance Of Calcium Propionate In Thin-Film Dryer,
2015
College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China
Analysis On Drying Performance Of Calcium Propionate In Thin-Film Dryer, Chen Guangyu, Li Qingsheng, Li Naiyu
Food and Machinery
The thin-film dryer process calculation mathematical model was established, with 25% calcium propionate as the research object, using the numerical simulation software MATLAB, drying rate and drying length was obtained and the influence of feed temperature, rotate speed, feed rate, and heating temperature was also discussed. The results showed that feed rate and heating temperature had a great influence on drying rate and drying length, while feed temperature and rotate speed had less influence on drying rate and drying length, which provided the basis for calcium propionate drying.
Optimizational Design And Simulation Of High-Speed Parallel Manipulator For Seed Separator,
2015
College of Mechanical Engineering of Tianjin University of Science and Technology, Tianjin 300222, China
Optimizational Design And Simulation Of High-Speed Parallel Manipulator For Seed Separator, Fan Yong, Wang Zhengcan, Wang Hongbin, Shi Yongjian
Food and Machinery
For seed separator actuator working characteristics of the low speed and low load, a small high-speed parallel manipulator was designed as seed separator of actuators. Using SolidWorks and MATLAB software simulation technology, established the simulation model of robot hand fully, and Usesd full performance indicators to make optimization design for parallel mechanism. The results show that the manipulator work within the scope of the condition number of jacobian matrix is small, smooth fluctuations, and manipulator kinematics performance and driving performance are good. Research on the establishment of the prototype of the manipulator and the control method has certain reference value.
Design And Experiment On Type Of Rollers Feeding Device Of Cutting Opening At Back Of Shrimp,
2015
Mechanic and Electronics College, Agriculture University of Hebei, Baoding, Hebei 071001, China
Design And Experiment On Type Of Rollers Feeding Device Of Cutting Opening At Back Of Shrimp, Wang Zehe, Zhang Xiuhua, Zhang Lili, Yi Jinggang
Food and Machinery
A cutting device for shrimp was designed, and a series of tests were carried out on efficiency of back open of shrimp and sense evaluation, between on gear knife and knife, post and reverse rotation, rotation speeds. The results showed that: by using the positive-free geared knife to cut shrimp when it came to 350~400 r/min, the cutting result achieved best. The device is stable, efficiency and suiting practice.
Properties Of Bay Scallop And Design Of V-Wheel Roller Grader,
2015
College of Mechanical and Electrical Engineering, Agricultural University of Hebei, Baoding, Hebei 071001, China
Properties Of Bay Scallop And Design Of V-Wheel Roller Grader, Wu Honglei, Yi Jinggang, Zhang Zhijun, Yin Xinling
Food and Machinery
The morphological properties of the bay scallop affects weight properties were analyzed quantitatively, by determining the shell length as a key trait for grading work. By combining the characteristics of the physics properties of the bay scallop, a V-wheel roller grader was designs. and Slid-works was used to build a dimensional machine model of V-wheel roller grader. The results showed that the design of V-wheel roller grader was reasonable and the structural was novel, can achieve high efficiency and precision grade scallops.
Design And Test On Continuous Peeling Device For Shrimp,
2015
College of Mechanical and Electrical Engineering, Agricultural University of Hebei, Baoding, Hebei 071001, China
Design And Test On Continuous Peeling Device For Shrimp, Zhang Zeming, Wang Zehe, Zhang Xiuhua, Wang Wei, Yang Shuhua
Food and Machinery
It proposed a program of continuous peeling for shrimp, and determined that the roller's nip angle was the major impact factor for shrimp peeling effecienby. The equipment was designed for continuous shrimp peeling, and tests were carried out to optimize structural parameters. Tests showed that with the decreases of the thickness of shrimp, the loss of shrimp gradually increased, while the sensory score represented by success rate and the difficulty of peeling increased, thus determining the classification level of peel shrimp 82～100 kg-1, fully guarantee the success rate of peeling; with the increase of the rotational speed, the …
Study On A New Type Of Equipment For Yuba Production,
2015
School of Mechanical & Electrical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
Study On A New Type Of Equipment For Yuba Production, Yuan Fucai, Sun Hailiang
Food and Machinery
In order to ensure Yuba production for high quality, efficiency and continuousness, by analyzing the current situation of domestic and international in Yuba production, and study the Yuba production equipment commonly used features, a new type of equipment for continuous Yuba production was designed. By using "Pro/E" software, designed the virtual design of 3D view model in equipment and its key components. Through the virtual assembly and interference inspection indicaed that the device was reasonable in structure, and had no interference phenomenon. Has certain practical value and theoretical significance of the study.
Design Of Coconut Husking Machine,
2015
Hainan University Electrical and Mechanical College, Haikou, Hainan 570228, China
Design Of Coconut Husking Machine, Zhang Zhiqiang, Fan Junqing, Wang Tao
Food and Machinery
From the aspects of coconut shell dryer at home and abroad research results summary, analysis analyzed the merit and shortcoming of all kinds of research, combining the reality of life and the actual operation, based on the geometric, physical and mechanical properties of coconut research, design a kind of roller tooth coconut peel dryer was designed. Used in the design of tooth nail pierced into the coconut, and nail tooth as the roller gear shaft rotates, the coconut coat torn off. Ultimately, stripped of coconut processing production process realized mechanization, the The coconut stripped machine structure is simple, but itand …
Kinetic Study Of Non-Enzymatic Browning In Chinese Jujube Concentrate During Storage,
2015
Tianjin Tianshi College, Tianjin 301700, China
Kinetic Study Of Non-Enzymatic Browning In Chinese Jujube Concentrate During Storage, Han Xifeng, Li Shuqi, Qiao Jingcheng, Sun Yue
Food and Machinery
Changes of qualities related to non-enzymatic browning in Chinese jujube concentrate at different storage temperatures (4 ℃, 26 ℃and 37 ℃) for 7 months were evaluated. Changes of reducing sugar, vitamin C, 5-hydroxymethylfurfural (HMF) were fitted with zero-order, first-order models respectively. The results showed that the fit of the zero-order model was superior to the first-order model to explain the kinetic changes of reducing sugar, and the fit of the first-order model was superior to the zero-order model to explain the kinetic changes of Vc. At 4 ℃, 26 ℃ or 37 ℃, a correlation between HMF formation and A …
Quality And Storage Stability Of High Hydrostatic Pressure-Treated Squid,
2015
Department of Food Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
Quality And Storage Stability Of High Hydrostatic Pressure-Treated Squid, Jin Yafang, Deng Yun
Food and Machinery
Effects of high hydrostatic pressure (HHP) treatments on the quality and shelf life of squid were studied. Squid muscles were high-pressure processed at pressure levels of 200, 400, 600 MPa for 5, 10, 20 minutes (25 ℃). Then the treated samples were stored at 4 ℃ for 10 days. The effects of HHP on biochemical, pH and microbiological characteristics were analyzed. The results showed that HHP retained the moisture, protein and fat contents of fresh squid. And no significant changes were observed in pH after processing. HHP resulted in significant reductions (P＜0.05) in microorganisms. The total viable counts (TVC) decreased …
Characteristic Of Water Holding Capacity And Color Changes Of Tan Sheep At Different Storage Temperatures,
2015
College of Agricultural, Ningxia University, Yinchuan, Ningxia 750021, China
Characteristic Of Water Holding Capacity And Color Changes Of Tan Sheep At Different Storage Temperatures, Wang Wei, Luo Ruiming, Li Junli, Zhang Ting
Food and Machinery
In this paper, the water holding capacity and color of Tan sheep were investigated under various storage temperatures. The postmortem Tan sheep preservation at 0～4 ℃ and 15 ℃, dynamic of pH, cooking loss, water holding capacity, dropping loss and meat color were measured at 1～7 d during preservation. The research results indicated that Tan sheep muscle which were preserved at 15 ℃ had fast decreasing speed of pH value, rapid speed of water holding capacity rally and worse meat color. Cooking loss of Tan sheep at 0～4 ℃ showed no significant differences from 15 ℃（P>0.05), dripping loss, water …
