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2020

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Articles 1291 - 1320 of 1479

Full-Text Articles in Food Science

Study On Steam Detection Method Of Chinese Spirits Steamer-Filling Operation Based On Support Vector Machine, Tian Wan-Chun, Zhang Gui-Yu, Tuo Xian-Guo, Wu Hao-Han, Shi Xiao-Shi Jan 2020

Study On Steam Detection Method Of Chinese Spirits Steamer-Filling Operation Based On Support Vector Machine, Tian Wan-Chun, Zhang Gui-Yu, Tuo Xian-Guo, Wu Hao-Han, Shi Xiao-Shi

Food and Machinery

Aiming at the problem of low accuracy of steam detection in the process of automation of "steam detection and steaming" of Chinese spirits. This paper proposes a steam detection method based on support vector machine (SVM) to improve the accuracy of automatic steam detection. First, the infrared thermal imager is used to collect the infrared grayscale image of the surface of the wine cellar in the barrel and perform histogram processing, then extract histogram’s multiple features. Combined with the engineering experience to add tags to form the training set, and through the support vector machine training to obtain the exploration …

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Validation Of The Method For Determination Of Aflatoxin B1 By Qd-Infinity Immunofluorescence Method In Grain, Hu Yuan-Bin, Xu Yan-Xia, Wang Da-Neng, Ma Zhi, Ni Xiao-Ying, Tang Yan-Ping, Yu Yang Jan 2020

Validation Of The Method For Determination Of Aflatoxin B1 By Qd-Infinity Immunofluorescence Method In Grain, Hu Yuan-Bin, Xu Yan-Xia, Wang Da-Neng, Ma Zhi, Ni Xiao-Ying, Tang Yan-Ping, Yu Yang

Food and Machinery

A method for rapid determination of aflatoxin B1 in grain based on QD-Infinity immunofluorescence was established with QD-Infinity as fluorescent probe. In order to confirm the accuracy of this method, multiple methods were used to evaluate the uniformity of the test results of AFB1 in grain which was determined by the QD-Infinity immunofluorescence method, high performance liquid chromatography and enzyme association immunoadsorption, respectively. Moreover the repeatability of the method and the difference between stations were investigated. The detection results of the superconducting point-immunofluorescence method for grain samples such as rice and corn were consistent with those of high performance …

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Establish Ment Of A High-Speed Method With Simultaneous Determination Of Multi-Component Sweeteners And Preservatives In Food, Cheng Shui-Lian, He Jian-Guo, Lu Gui-Ying, Yan Xu-Chao, Fu Bai-Ting Jan 2020

Establish Ment Of A High-Speed Method With Simultaneous Determination Of Multi-Component Sweeteners And Preservatives In Food, Cheng Shui-Lian, He Jian-Guo, Lu Gui-Ying, Yan Xu-Chao, Fu Bai-Ting

Food and Machinery

A qualitative and quantitative analysis method has been established forsimultaneous determination of six kinds of sweeteners (sodium cyclamate, saccharinsodium, acesulfame K, trichlorosucrose, aspartame and neotame) and five kinds of preservatives (natamycin, sodium benzoate, potassium sorbate, sodium dehydroacetate and sodium diacetate) in food by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The sample did not need to derive and purify, directing ultrasound extraction with methanol and water, separated on a Shim-pack-ODS Ⅲ column (75 L ×2.0 mm, 1.6 μm), used acetic acid ammonium (10 mmol/L)-methanol as the mobile phase for gradient elution. The ionization efficiencies of target compounds in mass spectrometry were analyzed …

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Establishment And Experimental Verification Of Simulation Model On Turnover Motion Of Ovoid Agricultural Products, Jiang Song, Chen Qi-Ying, Zhu Ti-Cao, Chen Zhang-Yao Jan 2020

Establishment And Experimental Verification Of Simulation Model On Turnover Motion Of Ovoid Agricultural Products, Jiang Song, Chen Qi-Ying, Zhu Ti-Cao, Chen Zhang-Yao

Food and Machinery

In order to further explore the influential factors and dynamic characteristics of turnover motion in the automatic orientation of pointed end and blunt end of the ovoid agricultural products, to reduce actual test costs, a digital virtual prototype (simulation model) consisting of ovoid products, conveying roller and guide rod is designed and built. Using the ADAMS simulation technology, the process of the ovoid body's turnover motion is simulated, and a measurement method for the rolling distance and effect distance of guide rod in the simulation experiment is created. On this basis, the simulation values and actual test values under different …

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Numerical Simulation And Optimization Of Piping Turbulence In Bubbling Fish Cleaner, Li Lu, Zhang Zhi-Ming, Wu Wen-Jin, Wang Lan, Xiong Guang-Quan, Shi Liu Jan 2020

Numerical Simulation And Optimization Of Piping Turbulence In Bubbling Fish Cleaner, Li Lu, Zhang Zhi-Ming, Wu Wen-Jin, Wang Lan, Xiong Guang-Quan, Shi Liu

Food and Machinery

First, Fluent software was used to numerically simulate the internal flow field of the shunt tube in the bubbling line, and standard k-ε turbulence model was applied to simulate the velocity profile of each vent gas on the manifold. The results showed that 40 cm was the opportune length of the shunt tube to obtain the similar flow rate of each gas jet, and the uniform and controllable bubbles. Then, the Mixture multiphase flow model and the extended standard k-ε turbulence model were used to simulate of the jet aperture and the hole spacing on the shunt tube. The results …

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Design And Test Of An On-Line Measuring System For Vacuum Freezing Dryer, Zhao Hai-Bo, Peng Xin, Wu Kun, Dai Jia-Ao Jan 2020

Design And Test Of An On-Line Measuring System For Vacuum Freezing Dryer, Zhao Hai-Bo, Peng Xin, Wu Kun, Dai Jia-Ao

Food and Machinery

To obtain real-time water contents and temperatures of vacuum freezing drying process, and to facilitate monitoring of drying process, a novel online measuring system (OMS) for vacuum freezing dryer was proposed and experimental tests were carried out. The system was composed of a microcontroller, a strain pressure sensor, a thermal resistance, modulus conversion modules, an OLED screen and other components. Wireless data transmission was used, and temperature correction and vibration reduction were carried out in the design. Experimental tests showed that the system could be used to measure the weight, moisture content and temperature in real time during the vacuum …

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Dimension Detection Of Micro Parts Based On Universe Quantum Algorithm, Xiong Bao-Yu, Jian Qing-Ping Jan 2020

Dimension Detection Of Micro Parts Based On Universe Quantum Algorithm, Xiong Bao-Yu, Jian Qing-Ping

Food and Machinery

Dimension detection of micro parts was proposed based on universe quantum algorithm. The operation efficiency of the quantum algorithm was improved by using the master-slave space structure, and the edge of micro-parts was detected by non-orthogonal quadratic B-spline wavelet and least square wavelet support vector regression, with the dimension detection of micro parts process. Experimental simulation showed that the universe quantum algorithm had smaller fluctuation range for the dimension measurement data of micro parts, and the variance value was lower than other methods. The measurement variance of outer wheel diameter reduced 75.29%, 78.40%, 64.47%, 60.95% and 52.15%, respectively, comparing with …

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A Design Of The Device For Clam Sorting And Impurity Removing, Bao Cheng-Wei, Duan Lan, Song Meng-Hua Jan 2020

A Design Of The Device For Clam Sorting And Impurity Removing, Bao Cheng-Wei, Duan Lan, Song Meng-Hua

Food and Machinery

In order to optimize the traditional manual method for clam sorting, a device was designed, based on the biological characteristics of clams and the principle of centrifugation and different density, to solve the problem of clam sorting, screening and impurity removing. The devicewas composed of three grades of rings with different clearance rollers for screening clams with different shell thickness. It could screen out small shells, conch and gravel. Through simulation analysis, the structural strength and stiffness of the device met the design requirements. Through the application, it was proved that the equipment could effectively improve the efficiency and accuracy …

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Design And Analysis Of The Cylinder Cam Mechanism Of The Group Cover Machine, Li Gan, Yin Cheng-Long, Jiang De-Fu, Ke Wan Jan 2020

Design And Analysis Of The Cylinder Cam Mechanism Of The Group Cover Machine, Li Gan, Yin Cheng-Long, Jiang De-Fu, Ke Wan

Food and Machinery

The cam profile of the cylindrical cam mechanism of the bottle cap assembly machine is designed, the curve is fitted, the three-dimensional model of the SolidWorks is established, and the cylindrical cam and the cylindrical cam of the sinusoidal curve fitting are simulated in Adams by the cylindrical cam and the sinusoidal curve fitting of the five polynomial curve fitting. The result of the simulation is compared and analyzed, which shows that the design of the cam wheel can be used in the manufacture of the cylindrical cam mechanism of the actual group cover machine.

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Powder Packaging Measurement Control System Based On Fuzzy Neural Network Pid Control, Wang Yan, Chen Jing, Wang Zhi-Shan, Li Kun-Xiang, Xu Yun, Xu Xue-Memg Jan 2020

Powder Packaging Measurement Control System Based On Fuzzy Neural Network Pid Control, Wang Yan, Chen Jing, Wang Zhi-Shan, Li Kun-Xiang, Xu Yun, Xu Xue-Memg

Food and Machinery

The work aims to the delay and nonlinearity of powder packaging metering control system caused by sensor, screw rotation inertia, zero drift, cutting impact and other factors, the powder packaging metering control system based on fuzzy neural PID control is proposed. Using the good dynamic control characteristic and self-learning ability of the fuzzy neural network to adjust the PID control proportion, integral and differential three adjustment parameters. The simulation and simulation of the system was carried out with the help of MATLAB simulink simulation software. The results show that the fuzzy neural network PID control system can shorten the stability …

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Targeted Temperature Control System For Beer Fermentation Based On S7-400 Plc, Zhang Song-Yu, Xu Bin, Yang Wen-Bin Jan 2020

Targeted Temperature Control System For Beer Fermentation Based On S7-400 Plc, Zhang Song-Yu, Xu Bin, Yang Wen-Bin

Food and Machinery

According to the characteristics of non-linear and large time delay in the temperature control system of beer fermentation, proposed the idea of target temperature control combined with fuzzy PID control algorithm, and designed a fuzzy PID controller based on target temperature control point to achieve temperature control, so as to improve the accuracy of temperature control of beer fermentation. Taking Siemens S7-400 PLC and Braumat software platform as the control core, the software and hardware structure of beer fermentation temperature control system was designed to realize the control and monitoring of the whole production process. The field application shows that …

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Design Of Automatic Feeding System For Pasta Fermentation Machinery, Zhang Li-Hua, Dong Tian-Fei, Niu Wen-Zhao Jan 2020

Design Of Automatic Feeding System For Pasta Fermentation Machinery, Zhang Li-Hua, Dong Tian-Fei, Niu Wen-Zhao

Food and Machinery

An optimization method of automatic fermentation system control based on digital signal processing (DSP) was proposed. Aiming at the optimization of the automatic feeding system in the automatic fermentation system, the error feedback control algorithm was used to design the automatic feeding control of the pasta fermentation machinery, and the hardware design of the automatic feeding system of the pasta fermentation machinery was based on the algorithm design. The results showed that the designed automatic feeding system of pasta fermentation machinery had good human-computer interaction and strong system stability, and the control error was only 0.1% when iterating 500 times …

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Effect Of Frozen Storage Time On The Oxidation Degree Of Porcine Myofibrillar Protein, Li Qian, Yu Li-Gang, Yang Yu-Kun, Li Mei-Ping, Guo Cai-Xia Jan 2020

Effect Of Frozen Storage Time On The Oxidation Degree Of Porcine Myofibrillar Protein, Li Qian, Yu Li-Gang, Yang Yu-Kun, Li Mei-Ping, Guo Cai-Xia

Food and Machinery

In this study, myofibrillar protein was used as the research object to investigate the effect of different frozen storage time on the oxidation degree of myofibrillar protein of pork. Raw pork was stored at 18 ℃ for different time (0, 1, 4, 8, 12 weeks), and used for the extraction of myofibrillar protein. Then protein oxidation parameters (carbonyl, total sulfhydryl group, free amino groups, surface hydrophobicity and endogenous tryptophan fluorescence) were determined. The results suggested that, carbonyl content increased significantly (P＜0.05), and total sulfhydryl group, free amino groups, surface hydrophobicity and endogenous tryptophan fluorescence content generally showed a decreasing trend …

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Research On Defect Detection And Classification Of Jujube Based On Improved Residual Network, Wen Huai-Xing, Wang Jun-Jie, Han Fang Jan 2020

Research On Defect Detection And Classification Of Jujube Based On Improved Residual Network, Wen Huai-Xing, Wang Jun-Jie, Han Fang

Food and Machinery

In this paper, an algorithm based on deep residual network is proposed to recognize and classify the surface defects and texture of jujube. The algorithm adopted jujube’s G channel of RGB color figure then to get the characteristics of the figure as network input, using residual learning way to expand the depth of the neural network learning, and residual error of the neural network activation function Relu replaced with SELU, the loss function softmax loss with center loss to replace, Dropout layer was developed for the training, reduce the risk of network through fitting, solved with deepening study depth gradient …

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Study On Purification And Antibacterial Activity Of Protamine From Takifugu Obscurus, Zhang Jia-Yuan, Chen Shun-Sheng, Zhang Hong-Cai Jan 2020

Study On Purification And Antibacterial Activity Of Protamine From Takifugu Obscurus, Zhang Jia-Yuan, Chen Shun-Sheng, Zhang Hong-Cai

Food and Machinery

In this study, Sephadex G-50 and CM Sepharose Fast Flow were used to purify the spermatozoa of Takifugu obscurus. Identification of protamine by arginine color reaction. The effects of protamine on the minimum inhibitory concentration, inhibition zone diameter and growth curve of Staphylococcus aureus, Escherichia coli and Salmonella were determined. The results showed that: The spermatozoa of Takifugu obscurus had an absorption peak at 217 and 273 nm, respectively, and the absorption peak at 217 nm was higher. The purified protamine was found to be better than the protamine before purification by SDS-PAGE electrophoresis. The strips were fine and …

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Effects Of Active Peptide Components Of Eupolyphaga Steleophaga On Blood Rheology, Four Indicators Of Blood Lipids And Blood Factor Levels In Rats With Acute Blood Stasis, Jiang Shan, Wang Shao-Ping, Dai Long, Zhang Jia-Yu, Gao Peng, Liu Zi-Han, Wang Yu-Qi Jan 2020

Effects Of Active Peptide Components Of Eupolyphaga Steleophaga On Blood Rheology, Four Indicators Of Blood Lipids And Blood Factor Levels In Rats With Acute Blood Stasis, Jiang Shan, Wang Shao-Ping, Dai Long, Zhang Jia-Yu, Gao Peng, Liu Zi-Han, Wang Yu-Qi

Food and Machinery

Pepsin and trypsin complex enzymes were used for biomimetic enzymatic hydrolysis of Eupolyphaga steleophaga. In order to obtain the most active fibrinolytic activity of the soil aphid active peptide component F2, the product was subjected to desalting, ultrafiltration, nanofiltration, DA201-C macroporous adsorption resin, dextran gel G-25 chromatography, reverse high performance liquid chromatography and semi-preparative liquid chromatography. Moreover, its effects on hemorheology index, blood lipids and serum nitric oxide (NO), superoxide dismutase (SOD), tissue plasminogen activator (t-PA) and fibrin (FIB) content of rats with acute blood stasis were also studied. E. ste-leophaga active peptide component F2 could significantly reduce blood …

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Synergistic Effects Of Dendrobium And Pueraria Thomsonii On Hpyerglycemic And Lipid-Lowing Between In Vitro And In Vivo, Xu Zi-Yang, Jing Si-Qun, Lin Yin-Jun, Ding Jia-Min, Zhou Yang, Yu Bai-Yin Jan 2020

Synergistic Effects Of Dendrobium And Pueraria Thomsonii On Hpyerglycemic And Lipid-Lowing Between In Vitro And In Vivo, Xu Zi-Yang, Jing Si-Qun, Lin Yin-Jun, Ding Jia-Min, Zhou Yang, Yu Bai-Yin

Food and Machinery

The synergistic effects were observed on inhibiting alpha-glucosidase activity between Dendrobium and Pueraria thomsonii form self-made chewable tablets by taking the acarbose as control. Drosophila melanogaster was used as experimental animal, and the model of Ⅱ diabetic Drosophila melanogaster was prepared by high glucose and high fat feeding. The experiment was divided into model control group, positive control group, Dendrobium (D) group, Pueraria thomsonii (PT) group and (Dendrobium + Pueraria thomsonii) (D+PT) group. After 7 days of lipid-lowering effects between Dendrobium and Pueraria thomsonii was analyzed. results showed that all of groups dose-effect perfusion, the total protein, triglycerides …

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Optimization Of The Extraction Process Of Polysaccharides From Euglena And Its Antioxidant Activity, Ge Zhi-Chao, Li Yan, Shi Wen-Zheng, Lang Meng Jan 2020

Optimization Of The Extraction Process Of Polysaccharides From Euglena And Its Antioxidant Activity, Ge Zhi-Chao, Li Yan, Shi Wen-Zheng, Lang Meng

Food and Machinery

Taking the euglena as the raw material, the extraction of euglena polysaccharide by ultrasonic-assisted enzymatic method and the optimal extraction conditions were studied, from the ultrasonic power, ultrasonic time, enzymolysis time, and enzyme concentration by response surface analysis(RSA) based on single factor tests. The results showed that the optimal process parameters were: ultrasonic power 360 W, ultrasonic time 19 min, neutral protease addition 3.7%, enzymatic hydrolysis time 3.5 h. Under the conditions, the yield of euglena polysaccharide reached 3.68%. The euglena polysaccharide (EGPS) was separated to three different ranges of molecular weight by ultrafiltration membrane, which were 35, 510 and …

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Effect Of Haematococcus Pluvialis On Baking Quality Of Bread, Wang Bao-Bei, Dai Zi-Wei, Liu Lu-Lu, Chen Wen-Xuan Jan 2020

Effect Of Haematococcus Pluvialis On Baking Quality Of Bread, Wang Bao-Bei, Dai Zi-Wei, Liu Lu-Lu, Chen Wen-Xuan

Food and Machinery

In this study, H. pluvialis was applied into bread to study its effect on baking quality. The results showed that the addition of H. pluvialis increased redness and yellowness of bread, and decreased the brightness. The specific volume of bread decreased slightly, but the moisture content did not change a lot with the addition of H. pluvialis. Within the content range studied, the hardness, stickiness and chewiness of bread increased gradually with increasing H. pluvialis, while the elasticity, resilience and cohesion did not change significantly. Similarly, during storage process, H. pluvialis had little effect on the changes of …

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Effect Of Wheat Flour Substitution Withlily Powder On Properties Of Dough And Quality Of Bread, Li Jia-Yi, Tan Xuan-Yu, Zou Jin-Hao, Wang Feng, Su Xiao-Jun Jan 2020

Effect Of Wheat Flour Substitution Withlily Powder On Properties Of Dough And Quality Of Bread, Li Jia-Yi, Tan Xuan-Yu, Zou Jin-Hao, Wang Feng, Su Xiao-Jun

Food and Machinery

In order to broaden the application of lily flour, wheat powder substituted with lily flour was applied in bread to improve nutrient value. The effects of wheat flour substitution with lily powder (0%, 5%, 10%, 15%, and 20%) on the microstruc-ture, pasting properties and rheological properties of dough and the quality of bread were investigated. The results showed that the water holding capacity increased significantly (P＜0.05) as the percentage of lily powder increased, while oil holding capacity first decreased and then increased. The addition of lily flour destroyed the compact and uniform microstructure of gluten. The pasting temperature of the …

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Effects Of Different Pretreatment Methods On The Quality Characteristics Of Red Rose By Hot Air Drying, Zhang Meng, Duan Xu, Ren Guang-Yue, Zhou Si-Qing, Xu Yi-Ming Jan 2020

Effects Of Different Pretreatment Methods On The Quality Characteristics Of Red Rose By Hot Air Drying, Zhang Meng, Duan Xu, Ren Guang-Yue, Zhou Si-Qing, Xu Yi-Ming

Food and Machinery

In order to understand the effect of different pretreatments on the hot air drying characteristics and quality of red rose, four different pretreatment methods ,i.e. impregnated 5% citric acid solution, 20% sugar solution, 20% NaCl and citric acid mixed solution and blanching, the pretreated petals were used as the control, to conduct comparative experiments and analysis of hot air drying. Sensory properties (color, total flavonoids, total phenols) and microstructure of red rose were examined, and combined with fuzzy mathematical comprehensive evaluation method for sensory evaluation. The results showed that drying rate of rose petals was influenced significantly by different pretreatment …

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Study On Synchronous Extraction Process Of Oil And Protein From Prunus Mira Nut And The Oil Quality Analysis, Kan Jin-Tao, Yuan Lei, Zhong Zheng-Chang Jan 2020

Study On Synchronous Extraction Process Of Oil And Protein From Prunus Mira Nut And The Oil Quality Analysis, Kan Jin-Tao, Yuan Lei, Zhong Zheng-Chang

Food and Machinery

Taking the Prunus mira nut as raw material, the oil and protein of were synchronous extracted by aqueous extraction method combined with enzymatic demulsification, the extraction process was optimized by orthogonal tests based on single factor experiment. The main physicochemical indexes of Prunus mira nut oil were determined, and the fatty acid compositions were analyzed by GC. The results indicated that the Prunus mira nut protein yields were(78.13±1.53)%, and oil total yields were(67.79±2.97)%, the optimal oil and protein extraction process were obtained as followed: sample size 150 mesh, liquid-solid ratio 8：1 (mL/g), pH 10, extraction temperature 50 ℃, extraction time …

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Optimization Of Fermentation Process And Analysis Of Antioxidant Capacity Of Purple Sweet Potato Powder, Song Ying, Liu Si-Han, Chang Xia, Hou Yu-Hao, Xie Qiu-Tao, Yuan Hong-Yan, Li Gao-Yang Jan 2020

Optimization Of Fermentation Process And Analysis Of Antioxidant Capacity Of Purple Sweet Potato Powder, Song Ying, Liu Si-Han, Chang Xia, Hou Yu-Hao, Xie Qiu-Tao, Yuan Hong-Yan, Li Gao-Yang

Food and Machinery

Based on the single factors, the response surface tests were used to optimize the process conditions of low-sugar yeast fermentation of the purple sweet potato to prepare high antioxidant activity powder, and the changes of total flavonoids, total phenols, anthocyanins and antioxidant capacity before and after fermentation were investigated. The optimum fermented conditions were determined as follows: 0.95% yeast addition, 10：22 (g/mL) ratio of feed to liquid, fermentation at 23 ℃ for 16 h. The antioxidant capacity was 404.94 mg VCEAC/100 g, with a total phenol content of 123.85 mg GAE/100 g, a total flavonoid content of 610.64 mg rutin/100 …

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Research Progress On Anaerobic Fermentation Mechanism And High-Density Anaerobic Fermentation Of Clostridium Butyrate, Wu Tian-Fu, Xie Xiao-Lin, Chen Mei-Biao, Zhou Lian, Chen Meng, Deng Ming-Rong, Yao Qing, Zhu Hong-Hui Jan 2020

Research Progress On Anaerobic Fermentation Mechanism And High-Density Anaerobic Fermentation Of Clostridium Butyrate, Wu Tian-Fu, Xie Xiao-Lin, Chen Mei-Biao, Zhou Lian, Chen Meng, Deng Ming-Rong, Yao Qing, Zhu Hong-Hui

Food and Machinery

In this paper, the mechanism of anaerobic fermentation of Clostridium butyrate, the mode of high-density anaerobic fermentation and the application of bioreactor are rviewed in order to realize the high-density fermentation of Clostridium butyrate in industrial production by improving the anaerobic fermentation process or improving the fermentation equipment, so as to greatly increase the number of live bacteria and reduce the production cost.

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Research Progress On Degradation Technology Of Harmful Gases In Granary, Pan Di, Ma Ting-Jun, Kang Kai, Bai Shu-Pei Jan 2020

Research Progress On Degradation Technology Of Harmful Gases In Granary, Pan Di, Ma Ting-Jun, Kang Kai, Bai Shu-Pei

Food and Machinery

There were many harmful gases in the process of storing grain in large granaries, which can not only cause environmental pollutions, but also endanger people's health. Reducing harmful gases in granaries and ensuring grain quality had become the focus of food storage industry. In this paper, the sources, types and harms of harmful gases produced in the process of grain storage were briefly described, and the relative degradation methods, principles, advantages and disadvantages of phosphine, were also introduced in detail. Furthermore, the feasibility of degradation of harmful gases in granary by plasma technology was emphasized, and the problems to be …

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Construction And Unitization Verification Of Diffusion And Backmixing Model For Continuous Countercurrent Extraction Of Astragalus Polysaccharide, Mao Lin-Lu, Sun Peng-Yao, Zhang Xia, Li Lin, Li Yu-Ting, Liang Yi, Li Bing Jan 2020

Construction And Unitization Verification Of Diffusion And Backmixing Model For Continuous Countercurrent Extraction Of Astragalus Polysaccharide, Mao Lin-Lu, Sun Peng-Yao, Zhang Xia, Li Lin, Li Yu-Ting, Liang Yi, Li Bing

Food and Machinery

In order to realize the accurate description of the extraction process of continuous countercurrent extraction (CCE) for Astragalus polysaccharides, a mathematical model of diffusion and backmixing was established and solved. The two-phase solute distribution in the single-flow continuous countercurrent extractor was described. The scale for describing the pilot scale was established. The diffusion back-mixing numerical model of the two-phase solute distribution in the extractor was tested by multi-effect simulation CCE of Astragalus polysaccharides. The results showed that the extraction temperature was 40~70 ℃, and the solid-liquid ratio was 1：6~1：14 (g/mL), within the single factor variation range of extraction time …

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Study On The Sources Of Nickel In Jujube Fruit, Yan Qiao-Li, Hua Zhen-Yu, He Wei-Zhong, Tao Yong-Xia, Wang Cheng Jan 2020

Study On The Sources Of Nickel In Jujube Fruit, Yan Qiao-Li, Hua Zhen-Yu, He Wei-Zhong, Tao Yong-Xia, Wang Cheng

Food and Machinery

Through the analysis of the total content of heavy metal nickel in soil, pesticide, fertilizer, farmyard manure and atmospheric dust samples, the exogenous input pathway of heavy metal nickel in jujube in typical areas was determined. ICP-MS (inductively coupled plasma mass spectrometry) was used to analyze the content of heavy metal nickel in the samples. The results showed that the tested soil and fertilizer samples contained heavy metal nickel in the range of 17.194~67.279 and 0.450~26.800 mg/kg, respectively. The total content of nickel in chicken manure, bioorganic fertilizer, amino acid water-soluble fertilizer and phosphate fertilizer was relatively high. In the …

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Distribution And Correlation Of Pb Between Procambarus Clarkii And Aquaculture Environment In Hunan Province, Tian Jin-Jin, Zhu Yu-Lin Jan 2020

Distribution And Correlation Of Pb Between Procambarus Clarkii And Aquaculture Environment In Hunan Province, Tian Jin-Jin, Zhu Yu-Lin

Food and Machinery

She sampling survey was used to sample the cultured P. clarkii and the environment from the freshwater shrimp breeding base in Hunan province. Tested the Pb content and performed statistical analysis on the relevant data. The results showed that the Pb content in shrimp, culture water and bottom sediment was Yiyang＞Yueyang＞Changde city in Hunan province. Among them, Yiyang city had the highest Pb over-standard rate, which was 63%. Significant differences in Pb content in shrimp head, tail, and water sediments were found in different city (P＜0.05), and Pb content between different city of culture water are not statistically significant differences …

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A Vision-Based Image Detecting System For Cigarette Tipping Machine, Wu Chen-Gang, Yang Chen, Xie Chong-Quan, Zhang Rui-Ping Jan 2020

A Vision-Based Image Detecting System For Cigarette Tipping Machine, Wu Chen-Gang, Yang Chen, Xie Chong-Quan, Zhang Rui-Ping

Food and Machinery

In this paper, a kind of cigarette tipping paper detection system based on machine vision is proposed, which uses STM32 as the core controller to control the timing synchronization of the coiler. The cigarette tipping paper on the transition drum is collected by the industrial camera, and the length of the cigarette paper is calculated and measured, and the unqualified cigarette is eliminated. At the same time, the unqualified cigarette tipping paper and detection data are recorded by the guide rail scale. Through practical application, the detection accuracy of the system is better than ±0.05 mm, and the maximum detection …

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Design Of Wireless Sensor Network For Fresh Food Supply Chain Management Based On Network Topology, Liu Yong-Li, Hou Qing-Feng Jan 2020

Design Of Wireless Sensor Network For Fresh Food Supply Chain Management Based On Network Topology, Liu Yong-Li, Hou Qing-Feng

Food and Machinery

Environmental monitoring during transportation is the key of fresh food supply-chain management. It provides important information for assessing food quality and predicting shelf life. Based on Zigbee standard wireless sensor network (WSN), a real-time monitoring system for fresh food supply chain was developed and designed in this study, and the configurable architecture and network switching scheme of integrated sensors was also improved to meet the practical application requirements. In terms of performance, the tree topology wireless sensor network system of 192 terminal devices and star topology wireless sensor network system of 80 terminal devices were implemented and evaluated. The test …

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