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Articles 781 - 810 of 5782

Full-Text Articles in Food Processing

Effects Of Vibration Mill's Vibration Mass On Superfine Grinding Performance Of Wheat Bran, Cheng Min, Sun Yan-Ling, Zhang Hai-Hong, Liu Bao-Guo Oct 2023

Effects Of Vibration Mill's Vibration Mass On Superfine Grinding Performance Of Wheat Bran, Cheng Min, Sun Yan-Ling, Zhang Hai-Hong, Liu Bao-Guo

Food and Machinery

Objective： Explore the effects of vibration mill's vibration mass on superfine grinding performance of wheat bran. Methods： A series of vibration impact grinding experiments of wheat bran was carried out by adjusting the grinding medium mass and wheat bran mass, respectively. Results： When the wheat bran mass was unchanged, the yield of wheat bran superfine powder showed a non-linear characteristic of first increasing and then decreasing with the increase of the quality of the grinding medium, and the maximum difference rate reached 123.53%. The quality of wheat bran micro powder also increased firstly and then decreased with the increase of …

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Method For Detecting Texture Defect Of Vacuum Seal Of Transparent Packaging Bag Based On Machine Vision, Zhang Bao-Sheng, Zhou Cong-Ling, Wang Yong-Qiang Oct 2023

Method For Detecting Texture Defect Of Vacuum Seal Of Transparent Packaging Bag Based On Machine Vision, Zhang Bao-Sheng, Zhou Cong-Ling, Wang Yong-Qiang

Food and Machinery

Objective: To solve the problems caused by the manual sampling inspection in the field of food packaging, such as difficult to operate continuously for a long time, easy to miss and wrong detection, and unreliable detection accuracy and stability. Methods: In this paper, a machine vision-based vacuum sealed texture detecting method for transparent packaging bag was proposed to replace manual detection. The image was preprocessed by algorithms such as ROI extraction, affine transformation and local binary pattern to highlight the texture features. On this basis, the gray level co-occurrence matrix was used to analyze the features of "good" and "defective" …

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Application Of Motion Graphic Design In Fmcg Food Packaging And Brand Visual Identity System, Wang Si-Ya, Zhang Yi Oct 2023

Application Of Motion Graphic Design In Fmcg Food Packaging And Brand Visual Identity System, Wang Si-Ya, Zhang Yi

Food and Machinery

This paper discusses the application strategy and development trend of motion graphic design in FMCG food packaging and brand visual identity system in the digital context. By analyzing the classic cases of global and regional FMCG brand marketing, this paper discusses the application strategy of motion graphic design in FMCG packaging and brand identity system in the digital context. The results show that motion graphic design with its artistic expression, inclusiveness of multiple technologies and styles, efficient and accurate information transmission efficiency, and flexible production mode, can enhance the identification and ductility of FMCG food packaging design, and is also …

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Numerical Simulation Study On Temperature Field Of Ice Slurry Pre-Cooled Broccoli, Li Gan, Wang Qing, Lu Li-Xin, Pan Liao Oct 2023

Numerical Simulation Study On Temperature Field Of Ice Slurry Pre-Cooled Broccoli, Li Gan, Wang Qing, Lu Li-Xin, Pan Liao

Food and Machinery

Objective: In order to solve the problem of complicated state in the process of pre-cooling packaging of fluid ice, it provides a basis for the application of fluid ice in the storage and transportation of fruits and vegetables, fresh-keeping and so on. Methods: Taking broccoli as the research object, the heat transfer model of pre-cooling broccoli with fluidized ice was established. The change of temperature field and ice crystal particles during the process of precooling and storage of broccoli was simulated by CFD. The effects of fluid ice crystal integral number and mass ratio of fluid ice on broccoli precooling …

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Effects On The Preservation Of Chilled Mutton By Using Polylactic Acid Nanofiber Films Loaded With Perillaldehyde, Wang De-Bao, Zou Yu-Fu, Li Jia, Yao Duo, Li Xing-Yun Oct 2023

Effects On The Preservation Of Chilled Mutton By Using Polylactic Acid Nanofiber Films Loaded With Perillaldehyde, Wang De-Bao, Zou Yu-Fu, Li Jia, Yao Duo, Li Xing-Yun

Food and Machinery

Objective: The purpose of the study was to investigate the antibacterial mechanical properties of PLA nanofiber film loaded with PAE and its preservation effect on chilled mutton. Methods: By loading different amount (0, 12.5, 25, 50, 100 μL/20 mL) of electrospinning solution perillaldehyde (PAE) in polylactic acid (PLA) matrix, the antibacterial nanofiber film packaging with certain water absorption properties was prepared through electrospinning technology. The appearance and mechanical properties of PAE-PLA packaging film and physical-chemical indexes of mutton during preservation were analyzed via scanning electron microscopy and electronic universal testing machine. Results: With the increase of loading amount of PAE …

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Effects Of Controlled Atmosphere On Storage Quality Of Water Bamboo, Ren Zi-Yan, Wei Wen-Wen, Jia Lian-Wen, Yang Xiang-Zheng, Wang Da Oct 2023

Effects Of Controlled Atmosphere On Storage Quality Of Water Bamboo, Ren Zi-Yan, Wei Wen-Wen, Jia Lian-Wen, Yang Xiang-Zheng, Wang Da

Food and Machinery

Objective: To clarify the effect of controlled atmosphere on preservation of water bamboo. Methods: Cold storage under air was used as control, the sensory quality, texture （firmness, chewiness and shear force）, color （L* value and WH value）, the contents of soluble protein, lignin and cellulose, as well as the activities of phenylalanine ammonia lyase （PAL） and polyphenoloxidase （PPO） were determined under four different gas components （CA1: 2% O2+7% CO2+91% N2, CA2: 5% O2+10% CO2+85% N2, CA3: 5% O2+7% CO2+88% N2 …

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Analysis And Prediction Of Storability And Storage Quality Of Pear Fruit Based On Clustering And Time Series Analysis, Zhou Hui-Juan, Ye Zheng-Wen, Li Rong-Hua, Wang Xiao-Qing, Luo Jun Oct 2023

Analysis And Prediction Of Storability And Storage Quality Of Pear Fruit Based On Clustering And Time Series Analysis, Zhou Hui-Juan, Ye Zheng-Wen, Li Rong-Hua, Wang Xiao-Qing, Luo Jun

Food and Machinery

Objective: The storability and storage quality of three pear varieties were evaluated to provide theoretical support for variety breeding and fresh-keeping technology. Methods: Zaoshengxinshui, HJ18 and HJ67 pear with similar genetic background were used as test materials. Fruit with the same maturity were stored in a cold storage with a temperature of （1.0±0.5） ℃ and a relative humidity of 85%～90% for 60 days. The fruit texture, sugar and acid and volatile substances were determined every 10 days, divide storage period and quality based on clustering, principal components and time series analysis. Results: The results showed that the fruit texture, sugar, …

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Improvement Of Antarctic Krill Oil On Reserpine Induced Zebrafish Depression Model, Guo Meng-Jie, Liu Yun, Wu Zhi-Qiang, Jiang Guo-Liang Oct 2023

Improvement Of Antarctic Krill Oil On Reserpine Induced Zebrafish Depression Model, Guo Meng-Jie, Liu Yun, Wu Zhi-Qiang, Jiang Guo-Liang

Food and Machinery

Objective: This study aimed to investigate the effect of Antarctic krill oil on zebrafish model of depression. Methods: The zebrafish (Danio rerio) model of depression was induced by 40 mg/L reserpine, and five groups, i.e., blank control group, model group, fluoxetine group, low-dose krill oil group and high-dose krill oil group were investigated and compared, buy using new tank test (NTT) and light dark box test (LDB). The central nervous system serotonin (5-HT), dopamine (DA), monoamine oxidase A (MAO-A) Interleukin-6 (IL-6), tumor necrosis factor α (TNF-α) and systemic cortisol (COR) levels of the five groups were …

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Changes Of Quality Characteristics And Antioxidant Capacities During Fruit Development Of Hardy Kiwifruit, Zhang Liang-Ying, Liu Lin, Yu Li-Jie, Liu Qi, Qi Bian-Bin Oct 2023

Changes Of Quality Characteristics And Antioxidant Capacities During Fruit Development Of Hardy Kiwifruit, Zhang Liang-Ying, Liu Lin, Yu Li-Jie, Liu Qi, Qi Bian-Bin

Food and Machinery

Objective: This study aimed to provide theoretical basis for hardy kiwifruit quality improvement and rational utilization. Methods: Taking the main variety 'Longcheng No. 2' and line 'Haijia' as experimental materials, the changes of basic quality indexes, contents of total phenolics and flavonoids were analyzed during fruit development. On this basis, the antioxidant capacities were comprehensively evaluated by three assays (FRAP iron reducing ability, ABTS radical scavenging ability and DPPH radical scavenging ability). Furthermore, the differences of total phenolics and antioxidant capacities in different parts of fruit were compared. Results: ① The contents of soluble solids, titratable acids and Vc in …

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Antioxidant And Hypoglycemic Activities Of Different Graded Fractions Of Polysaccharide From Goldenmelon, Chen Bing-Jie, Qiao Yong-Jin, Wang Xiao, Wang Chun-Fang, Liu Gui-Ge Oct 2023

Antioxidant And Hypoglycemic Activities Of Different Graded Fractions Of Polysaccharide From Goldenmelon, Chen Bing-Jie, Qiao Yong-Jin, Wang Xiao, Wang Chun-Fang, Liu Gui-Ge

Food and Machinery

Objective: The study aimed to research the physicochemical properties, structure, antioxidant activity and hypoglycemic activity of different fractions of polysaccharide of goldenmelon. Methods: Four kinds of goldenmelon polysaccharides (CP-40, CP-60, CP-70, CP-80) were obtained by graded purification of water extraction and alcoholic precipitation. Their molecular weight, monosaccharide composition, group composition, antioxidant and hypoglycemic activities were investigated by high performance liquid chromatography and fourier transform infrared spectroscopy. Results: With the increase of ethanol volume fraction, the total sugar content increased and the glucuronic acid content decreased. The molecular weights of these four polysaccharides were different, which indicated by the same composition …

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Effects Of Different Growth Patterns On Nutritional Quality Of Nostoc Commune, Xie Jie-Fei, Wang Chao, Deng Zhong-Yang Oct 2023

Effects Of Different Growth Patterns On Nutritional Quality Of Nostoc Commune, Xie Jie-Fei, Wang Chao, Deng Zhong-Yang

Food and Machinery

Objective: Replacing wild resources with artificially cultivated Nostoc commune to protect the natural environment. Methods: Compare the biochemical composition, texture characteristics, and sensory evaluation of indoor, outdoor cultivation and wild N. commune, while using outdoor cultivation of Nostoc sphaeroides as a control in the above three aspects. Results: The ratio of dry weight to wet weight of wild N. commune was the largest （2.42%）, and its hardness and elasticity were the highest, which were 1.184 N and 78.5%, respectively. The content of phycoerythrin and polysaccharide of outdoor N. commune were the lowest, which were 0.19% and 24.45%, respectively. The …

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Study On The Effects Of Adding Konjac Refined Flour On The Quality Of Fresh Wet Rice Noodle, Gong Xue, Xie Song-Feng, Xia Zeng-Run, Wang Ai-Xia, Tong Li-Tao Oct 2023

Study On The Effects Of Adding Konjac Refined Flour On The Quality Of Fresh Wet Rice Noodle, Gong Xue, Xie Song-Feng, Xia Zeng-Run, Wang Ai-Xia, Tong Li-Tao

Food and Machinery

Objective: This study aimed to develop konjac rice noodles products with low glycemic index. Methods: The fresh wet rice noodles was made by adding 20%, 10% and 5% konjac refined flour into rice noodles, respectively. The effects of the addition of konjac refined flour on the texture, cooking performance, and sensory quality of rice noodles were studied by texture analyzer and rapid viscosity analyzer. The starch hydrolysis rate, digestion rate, and glycemic index of konjac rice noodles were studied by in vitro digestion model. Results: The cooking loss rate and turbidity of 5% konjac rice noodles were significantly reduced, and …

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Optimization Of The Processing Parameters Of Shiitake （Lentinus Edodes） Crisps During Heat Pump Coupled With Instant Controlled Pressure Drop Puffing Drying Process, Zhao Ya, Zhang Yue-Xiang, Xu Yan, Shi Qi-Long Oct 2023

Optimization Of The Processing Parameters Of Shiitake （Lentinus Edodes） Crisps During Heat Pump Coupled With Instant Controlled Pressure Drop Puffing Drying Process, Zhao Ya, Zhang Yue-Xiang, Xu Yan, Shi Qi-Long

Food and Machinery

Objective: The objective of this study was to develop high-quality non-fried whole shiitake (Lentinus edodes) crisps due to having high oil content of vacuum fried L. edodes crisps which inevitably pose health risks after long-term use. Methods: Based on uniform design, instant controlled pressure drop (DIC) was used to investigate the influences of moisture content after heat pump pre-drying, puffing temperature and vacuum drying temperature on the puffing degree, rehydration ratio, total color difference, hardness and crispness of L. edodes crisps. The polynomial regression model was established by using a weighted comprehensive score method, and it was optimized …

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Preparation Of Ppi-Ta-Md Microcapsules By Pickering Emulsion Method And Its Effect On Oxidation Stability Of Pumpkin Seed Oil, Zhuang Hu, Yang Xiao-Fan, Liu Xin-Le, Lei Yu-Qing, Li Shu-Gang Oct 2023

Preparation Of Ppi-Ta-Md Microcapsules By Pickering Emulsion Method And Its Effect On Oxidation Stability Of Pumpkin Seed Oil, Zhuang Hu, Yang Xiao-Fan, Liu Xin-Le, Lei Yu-Qing, Li Shu-Gang

Food and Machinery

Objective: This study aimed to improve the oxidation, exploitation, and utilization of pumpkin seed oil (PSO). Methods: Pea protein isolate (PPI) -Tannic acid (TA) stabilized Pickering emulsion with Maltodextrin (MD) was used as the filling material, and prepared pumpkin seed oil microcapsules by spray drying. Results: After spray drying the Pickering emulsion, the smooth surface of the medium shell structure of microcapsule powder can be obtained. By increasing TA concentration, microcapsules showed smaller particle size [(32.00±0.28) μm], lower moisture content [(1.970±0.043)%], and higher bulk density [（0.725±0.014) g/cm3]. The FFA release rate of pumpkin seed oil microcapsules with different …

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Effects Of Dynamic High-Pressure Processing On Bioactive Components Of Milk, Ai Zheng-Wen, Xu Zhi-Yuan, Ye Jing-Jin Oct 2023

Effects Of Dynamic High-Pressure Processing On Bioactive Components Of Milk, Ai Zheng-Wen, Xu Zhi-Yuan, Ye Jing-Jin

Food and Machinery

Milk contains a variety of bioactive ingredients, such as lactoferrin and immunoglobulin, which are beneficial to health. Reducing the loss of these proteins during processing has always been the focus of attention. Dynamic high-pressure processing technology, also known as ultra-high-pressure homogenization (UHPH), is one of the relatively novel processing technology means. In this review, the research progress of the heat load intensity and the retention of key nutrients in the processing of dairy products were summarized from the aspects of Maillard reaction products, lactoferrin, immunoglobulin and other bioactive ingredients and vitamin loss. Moreover, the development direction of ultra-high-pressure homogenization in …

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Structure, Working Principle And Application Of Mechanical Shell Breaker, He Ting, Zhang Rui, Ren Guang-Yue, Duan Xu, Li Cai-Yun, Li Ya-Chun Oct 2023

Structure, Working Principle And Application Of Mechanical Shell Breaker, He Ting, Zhang Rui, Ren Guang-Yue, Duan Xu, Li Cai-Yun, Li Ya-Chun

Food and Machinery

Shelling rate and kernel breaking rate are the two key indicators of shelled materials, and mechanical shelling is one of the important methods to improve these key indicators. In this paper, the common mechanical shelling methods, mechanical shelling types, mechanical shelling principles and development status of shelling materials were analyzed. The advantages and disadvantages of mechanical hulling equipment were summarized, and suggestions were made for the problems existing in the current application of mechanical hulling.

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Research Progress Of Polyphenols In Edible Plant Enzymes, Yin Xiao-Qing, Wen Hua-Ying, Zhang Yu-Hong, Bai Ting, Wang Shan-Shan Oct 2023

Research Progress Of Polyphenols In Edible Plant Enzymes, Yin Xiao-Qing, Wen Hua-Ying, Zhang Yu-Hong, Bai Ting, Wang Shan-Shan

Food and Machinery

Polyphenol is one of the characteristic physical and chemical indexes of edible plant enzyme, which has the effects of anti-oxidation, reducing fat and anti-tumor. This paper reviews the composition of polyphenols in food plant enzyme products, the factors affecting the formation of polyphenols in food plant enzyme products, the health care effects of polyphenols, and the further research directions of polyphenols in edible plant enzymes are also prospected.

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Advances In Non-Thermal Treatment Techniques To Control Yogurt Post-Acidification, Niu Yu-Qin, Wang Chen-Yuan, Zhao Pei, Li Shu-Sen, Liu Ju-Long, Sun Er-Na, Wu Zi-Jian Oct 2023

Advances In Non-Thermal Treatment Techniques To Control Yogurt Post-Acidification, Niu Yu-Qin, Wang Chen-Yuan, Zhao Pei, Li Shu-Sen, Liu Ju-Long, Sun Er-Na, Wu Zi-Jian

Food and Machinery

Post-acidification is one of the most important factors affecting the sensory quality, flavor characteristics and stability of yogurt during shelf-life. Non-thermal treatments are novel methods to control post-acidification, which can maintain the original nutritional properties and sensory quality of food to the maximum extent. In this paper, the mechanism of post-acidification of lactic acid bacteria was reviewed. The mechanism and recent research progress of non-heat treatment processes such as ultra-high pressure, ultrasound, pulsed electric field, CO2 treatment, irradiation were analyzed and provided theoretical guidance for the development and industrial application of non-heat acid control technology.

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The Bitterness Inhibition Effect Of Ferulic Acid And Its Phenyl Ring Substituted Derivatives On Branched Chain Amino Acids, Wang Hao, Li Jiaxing, Zheng Jianxian Oct 2023

The Bitterness Inhibition Effect Of Ferulic Acid And Its Phenyl Ring Substituted Derivatives On Branched Chain Amino Acids, Wang Hao, Li Jiaxing, Zheng Jianxian

Food and Machinery

Objective: This study aimed to explore the effect of group changes at the third position of the benzene ring of ferulic acid （FA） on the bitterness inhibition effect of branched chain amino acids and their flavor characteristics. Methods: FA and its phenyl ring substituted derivatives were synthesized and their structures were identified by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and mass spectrometry. The electronic tongue test was used to evaluate the improvement in the bitter taste of branched-chain amino acids by FA and its derivatives, including bitterness inhibition rate, self-flavor, and the effect on other tastes. Results: The …

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Effects Of Microbubbles Technology On The Thermal Stability And Quality Of Crystallized Honey, Kuang Xinyi, Cui Zhengwei, Yu Fumin, Li Li Oct 2023

Effects Of Microbubbles Technology On The Thermal Stability And Quality Of Crystallized Honey, Kuang Xinyi, Cui Zhengwei, Yu Fumin, Li Li

Food and Machinery

Objective： To obtain excellent sensory and shelf life of crystallized honey. Methods： The process parameters of microbubble crystallized honey were prepared by mechanical stirring on laboratory scale. The physical properties of crystallized honey were changed by filling microbubble, and its thermal stability and physical properties were investigated. Results： For 200 g honey the optimized aerated parameters were as follows: the speed of the mixer, 2 600 r/min; the inflatable bubble time, 5 min; and the inlet flow rate, 6 L/min. The thermal stability time of the current improved product at 35 ℃ was increased by 41.51%, and while the hardness …

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Plasma Assisted Ultrasonic-Assisted Extraction Of Chitin From Crayfish Shell By Weak Acid And Weak Base Method, Ding Zijun, Li Jinlin, Fu Yingfei, Zhang Qiuxia, Mao Yiying, Wang Wei, Peng Bin, Tu Zongcai, Zhou Yan Oct 2023

Plasma Assisted Ultrasonic-Assisted Extraction Of Chitin From Crayfish Shell By Weak Acid And Weak Base Method, Ding Zijun, Li Jinlin, Fu Yingfei, Zhang Qiuxia, Mao Yiying, Wang Wei, Peng Bin, Tu Zongcai, Zhou Yan

Food and Machinery

Objective: To explore a green and efficient method for extracting chitin. Methods: The crayfish shells were crushed through three mesh sieves to obtain the raw material. Utilizing ultrasonic wave and citric acid and urea to remove calcium and protein from the sample, decolorize it with hydrogen peroxide, filter it, and then dry it to produce chitin products. The particle size of the chitin sample was analyzed by laser scattering particle size distribution analyzer. Infrared absorption characteristics were measured by an infrared spectrometer. Scanning electron microscopy was used to observe the apparent structure of the sample. Results: It was shown that …

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Amino Acid Characteristics And Nutritional Evaluation Of Flammulina Filiformis Protoplast Hybrid Strains, Lu Huan, Liu Jianyu, Shang Xiaodong, Yang Hui, Wu Yansha, Wang Ruijuan Oct 2023

Amino Acid Characteristics And Nutritional Evaluation Of Flammulina Filiformis Protoplast Hybrid Strains, Lu Huan, Liu Jianyu, Shang Xiaodong, Yang Hui, Wu Yansha, Wang Ruijuan

Food and Machinery

Objective: This study aimed to investigate the quality differences among different hybrid enoki mushrooms （Flammulina filiformis） strains and breed new strains with high quality. Methods: Two different protoplast monocytes of yellow enoki mushrooms Fv1923 were used as one of the parents to cross with 6 enoki mushrooms protoplasts （2 yellow and 4 white strains）, and a total of 12 yellow hybrid strains were obtained. Principal component analysis and cluster analysis were used to evaluate the free amino acids of 12 hybrid strains, and the flavor diversity of different protoplast hybrid strains was also evaluated. Results: The average contents …

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Mechanism Of Interaction Between Composite Ga/Egcg And Heat-Denatured Whey Protein By Fluorescence Quenching, Lin Jinou, Cao Yanyun, Han Jianzhong Oct 2023

Mechanism Of Interaction Between Composite Ga/Egcg And Heat-Denatured Whey Protein By Fluorescence Quenching, Lin Jinou, Cao Yanyun, Han Jianzhong

Food and Machinery

Objective: This study aimed to develop a new carrier system for food functional factors that can effectively regulate the release characteristics during processing, transportation, and storage. Methods: The interaction mechanism between gallic acid （GA） and epigallocatechin gallate （EGCG）, which were combined at different molar ratios （1∶0, 3∶1, 1∶1, 1∶3, 0∶1）, with heat-denatured whey protein isolate （HWPI） was investigated at various temperatures （298.2, 304.2, 310.2 K） using a fluorescence quenching method. Results: The results showed that compared with GA, EGCG had a stronger affinity for HWPI, and when they coexisted, they inhibited each other's binding to HWPI, resulting in decreased binding …

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Effects Of Alkali-Heat-Modified Rice Residue Glutenin On Stability Of W/O/W Double Emulsions, Guo Yuanbo, Xue Jing, Zhang Cheng, Wang Zhixiao, Fu Xiangjin, Long Zhao Oct 2023

Effects Of Alkali-Heat-Modified Rice Residue Glutenin On Stability Of W/O/W Double Emulsions, Guo Yuanbo, Xue Jing, Zhang Cheng, Wang Zhixiao, Fu Xiangjin, Long Zhao

Food and Machinery

Objective: To achieve the application of rice dreg glutelin in emulsions system. Methods: This paper selected alkali-heat modified rice dregs glutenin and span80 as emulsifiers to prepare W/O/W double emulsions by one-step emulsification method, and investigated the effect of protein concentration on the stability of double emulsions to provide the theoretical reference for the preparation of stable double emulsions by one-step emulsification. Results: When the protein mass fraction increased from 0.5% to 2.5%, the large particle size peak disappears in emulsion, the apparent viscosity and viscoelasticity of emulsions were improved, the centrifugal stability and storage stability were enhanced, enhanced dual …

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Synthesis Of Reduced Graphene Oxide-Gold Composite Nanomaterials With High Sers Activity And Application Of Ofloxacin Detection, Cheng Xinlei, Yang Wuying, Du Juan Oct 2023

Synthesis Of Reduced Graphene Oxide-Gold Composite Nanomaterials With High Sers Activity And Application Of Ofloxacin Detection, Cheng Xinlei, Yang Wuying, Du Juan

Food and Machinery

Objective: This study provided a new research direction for the detection of ofloxacin content. Methods: Using biomass reduction method to formulate a reduced graphene oxide-gold composite nanomaterials (rGO-AuNPs) , which had high surface enhanced Raman scattering (SERS) activity. The successful synthesis of rGO-AuNPs was demonstrated by ultraviolet visible spectroscopy, transmission electron microscopy and scanning electron microscopy, respectively. The Raman enhancement factor (EF) of rGO-AuNPs was measured and calculated. Based on the SERS hot spot effect and the specific binding ability of nucleic acid aptamer, ofloxacin content detection system was established, the detection conditions were optimized, the standard curve was established, …

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Residue Analysis And Security Judgement Of Parathion-Methyl And Parathion Residues In Tea, Chen Yantong, Li Jie, Li Huan, Tan Jun Oct 2023

Residue Analysis And Security Judgement Of Parathion-Methyl And Parathion Residues In Tea, Chen Yantong, Li Jie, Li Huan, Tan Jun

Food and Machinery

Objective： To detect the level of parathion-methyl and parathion residues in different types of tea by high pressure liquid chromatography coupled with matrix solid phase dispersion. Methods： Before determined by high pressure liquid chromatography （HPLC）, the tea samples were pretreated by matrix solid phase dispersion method grinding with neutral alumina as dispersant and eluting by ethyl acetate: n-hexane （8%）. Results： The results showed that this method was simple, rapid and accurate, with good linearity （0.999 6 for parathion-methyl and 0.999 5 for parathion）, low detection limits （0.015, 0.006 mg/kg, respectively） and high recoveries （90.67% and 86.67%, respectively）. Incidence of parathion-methyl …

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A Method For On-Site And Rapid Detection Of Trace Cadmium In Rice Based On Colloidal Goldlateral Chromatography, Wang Ranran, Yao Li, Yao Bangben, Chen Wei, Chen Zhaoran Oct 2023

A Method For On-Site And Rapid Detection Of Trace Cadmium In Rice Based On Colloidal Goldlateral Chromatography, Wang Ranran, Yao Li, Yao Bangben, Chen Wei, Chen Zhaoran

Food and Machinery

Objective： A colloidal gold test strip method that can achieve on-site and rapid detection of cadmium elements in rice was established. Methods： Based on lateral immunochromatographic technology, the colloidal gold test strip was systematically optimized for a series of parameters that affect the detection performance. Results： The visual detection limit of cadmium in rice was reached at 10 ng/g with the colloidal gold test strip. In practical applications, the sample pretreatment process is simple, low concentration acid can be directly extracted and diluted for test strip detection. Conclusion: The colloidal gold test strip was suitable for on-site rapid screening ofcadmium …

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Determination Of Four Arsenic Species In Aquatic Products By Liquid Chromatography-Atomic Fluorescence Spectrometry, Liu Zhenghua, Li Zhonghai Oct 2023

Determination Of Four Arsenic Species In Aquatic Products By Liquid Chromatography-Atomic Fluorescence Spectrometry, Liu Zhenghua, Li Zhonghai

Food and Machinery

Objective: Four arsenic species of arsenic in aquatic products were analyzed using ultrasonic-assisted extraction combined with high performance liquid chromatography-atomic fluorescence spectrometry （HPLC-AFS）. Methods: Four arsenic compounds were extracted ultrasonically from the samples using 50%（v/v） methanol-aqueous solution as extraction solvent. The chromatographic separation was performed on Hamilton PRP-X100 anion exchange column using a mixture of 15 mmol/L ammonium dihydrogen phosphate solution with the pH adjust to 6.0 as the mobile phase. Results: Under the optimized conditions, there were good linear relationships in the range of 0～100 μg/L for four arsenic compounds, with correlation coefficients all above 0.998. The limit of …

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A Trajectory Planning Method For Delta Sorting Robot In Tomato Production Line Based On Improved Gate Shaped Trajectory, Feng Yanfang, Wu Birui, Zhao Qian Oct 2023

A Trajectory Planning Method For Delta Sorting Robot In Tomato Production Line Based On Improved Gate Shaped Trajectory, Feng Yanfang, Wu Birui, Zhao Qian

Food and Machinery

Objective: To solve the problems of low efficiency and poor motion stability of DELTA robots in the tomato sorting process of existing tomato processing production lines. Methods: Based on the analysis of the DELTA robot sorting system, the optimized gate shaped trajectory of the cyclotron was used for DELTA robot trajectory planning. By replacing the right angle part of the gate shaped trajectory with a convolutional line, an optimization model with the goal of time optimization was established. The optimized parameters of the gate shaped trajectory were solved using an improved ant colony optimization algorithm. Analyzed its performance through experiments. …

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Design And Experiment Of Light Angle Adjustable Device For Measuring Sugar Content Of Citrus By Near Infrared Spectroscopy, Zeng Xianming, Han Longbo, Wen Tao, Dai Xingyong Oct 2023

Design And Experiment Of Light Angle Adjustable Device For Measuring Sugar Content Of Citrus By Near Infrared Spectroscopy, Zeng Xianming, Han Longbo, Wen Tao, Dai Xingyong

Food and Machinery

Objective: To solve the problem of insufficient spectral information obtained by the fixed illumination angle of the near-infrared spectroscopy to detect the sugar content of fruits. Methods: A light angle adjustable device for the diffuse transmission near-infrared spectroscopy was designed to detect the sugar content of citrus based on the simplified model of the remote motion center of the light source. The device had carried out the structural performance analysis and the test of the citrus sugar under different illumination angles. Results: The adjustment range of the light angle of the device was set to 0°～60°. The displacement deviation between …

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