Study On Dna Barcoding Identification Technology Of Common Pathogenic Microorganisms In Food,
2021
National Quality Supervision and Inspection Centre for Agricultural and Sideline Product, Changsha, Hunan 410007, China; Hunan Testing Institute of Product and Commodity Supervision, Changsha, Hunan 410007, China
Study On Dna Barcoding Identification Technology Of Common Pathogenic Microorganisms In Food, Zhong Wen-Tao, Xu Yue, Wang Shu-Hao, Wang Fang-Mei
Food and Machinery
In order to explore the application prospects of DNA barcode technology in microbial identification, the 16S rRNA sequences of 8 common pathogenic microorganisms in food were compared. The PCR amplification, sequencing and database search were conducted followed by universal primers designing, which were purposed to establish a microbial identification method based on DNA barcode. The results showed that the variable region sequence of V3～V6 amplified provided sufficient resolution for Gammaproteobacteria Enterobacteriales, including Vibrionales, and Pseudomonadales to accurately distinguish pathogenic bacteria and related interfering bacteria, corresponding to Bacillibacteria (Bacillales) could be identified to the “genus” level.
Model Simulation Research On The Effectiveness Of Fresh Food E-Commerce Food Safety Supervision Mechanism,
2021
Beijing Technology and Business University E-commerce and Logistics School, Beijing 100089, China
Model Simulation Research On The Effectiveness Of Fresh Food E-Commerce Food Safety Supervision Mechanism, Yang Hao-Xiong, Shao En-Lu, Ma Jia-Ji
Food and Machinery
Aiming at the problem of fresh e-commerce food safety, based on the existing supervision system, we constructed a fresh e-commerce food quality and safety supervision simulation model composed of fresh e-commerce suppliers, fresh e-commerce platform, government regulatory agencies and consumers. We evaluated the quality preference and investment strategies of the suppliers, and the effects of fresh food safety brought by government and regulatory policy for platform were also investigated. The results showed that that the effective government sampling inspection on the platform could improve the safety of the fresh e-commerce products, and the proportion of sampling inspection on the fresh …
Construction Of A Prediction Model For Mainstream Cigarette Smoke Quality Based On Fisher Linear Discriminant Analysis Method,
2021
Yunnan China Tobacco Industry Co., Ltd., Kunming, Yunnan 650231, China
Construction Of A Prediction Model For Mainstream Cigarette Smoke Quality Based On Fisher Linear Discriminant Analysis Method, Shan Qiu-Fu, Zhang Tao, Li Chao, Luo Lin, Chen Fan-Rui, Zhang Hai-Tao
Food and Machinery
To establish a method for discriminating cigarette quality, using Fisher's linear discriminant analysis theory, 16 parameters of 30 kinds of Chinese commercial finished cigarettes as discriminating factors, and of CO, tar amount and smoke nicotine amount as three discriminant functions the Fisher discriminant model was established. After verification, the model has a false positive rate of 0, and the prediction accuracy of the test calculation is 100%.
Design Of Multi-Station Rotary Capping Machine For Filling Beverage Packaging,
2021
South China University of Technology School of Design, Guangzhou, Guangdong 510006, China
Design Of Multi-Station Rotary Capping Machine For Filling Beverage Packaging, Yang Jing, Chen Cai-Xia, Luo Zhe-Hui, Liu Xie-You
Food and Machinery
Firstly, according to the production process of liquid filling products, the overall structure and main parameters of the multi-station rotary capping machine are designed, and the assembly drawing is drawn. Then, the contour curve of the cylindrical CAM of the capping machine is designed through calculation, and the curve is optimized by using the quintic polynomial fitting. Finally, the three-dimensional solid model of the CAM is established in Solidwork. The results show that the actual production efficiency of the multi-station rotary capping machine can reach 14 000 bottles per hour, the operation is stable at high speed, and the noise …
A Control Technique For Clamping Mechanism Of Fruit Sorting Robot Based On Improved Smooth Sliding Mode Impedance Control,
2021
Henan Industrial Science and Technology School, Xinxiang, Henan 453000, China
A Control Technique For Clamping Mechanism Of Fruit Sorting Robot Based On Improved Smooth Sliding Mode Impedance Control, Hu Guo-Xi, Wang Chao, Liu Yu-Heng
Food and Machinery
In view of the shortcomings of the current automatic non-destructive fruit sorting mechanism, based on the system architecture of automatic fruit sorting robot, a control method for the clamping mechanism of automatic fruit sorting robot was proposed, which combined time delay estimation and smooth sliding mode impedance control method.The time delay estimation method was used to obtain the dynamic model of the clamping mechanism of the automatic fruit sorting system, and a smooth sliding mode impedance control method with adaptive rule adjustment was further designed, which was verified by simulation and experiment.The results showed that this method could make the …
Numerical Simulation Of The Influence Of Environmental Factors On The Column Dissipating Cooling Of Cold Storage Floor,
2021
Department of Mechanical and Electrical Engineering, Beihai Vocational College, Beihai, Guangxi 536000, China
Numerical Simulation Of The Influence Of Environmental Factors On The Column Dissipating Cooling Of Cold Storage Floor, Sun Xiao-Hong
Food and Machinery
Modeling of the ventilation floor and the column of a cold storage was investigated. The aim was to prevent the local frost heaving of the floor caused by the scattered cooling of the floor column of the cold storage, as well as to improve the scientific management level of the cold storage and reduce the building energy consumption. Using the cooling capacity of the floor and column, and the temperature near the column as indexes, the influence of the indoor temperature, indoor convective heat transfer coefficient, inlet air temperature of ventilation pipe and wind speed on the cooling capacity and …
Defective Jujube Detection Technology Based On Multi-Scale Convolutional Neural Network,
2021
School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
Defective Jujube Detection Technology Based On Multi-Scale Convolutional Neural Network, Fang Shuang, Zhao Feng-Xia, Chu Song-Feng, Wu Zhen-Hua
Food and Machinery
In this paper, a method based on a multi-scale convolutional neural network for detecting defects in jujube is proposed. Parallel multi-scale convolution modules were added to the AlexNet convolutional neural network to increase the depth and width of the network and reduce the parameters in the network; Added batch normalization processing to the convolutional layer to reduce changes in data distribution during training and improve the generalization ability of the network. Taking the yellow-skinned jujube, moldy jujube, broken-head jujube and normal jujube in Xinjiang dried jujube as the research objects, these dried jujubes were trained and verified. The results showed …
Research On Precise Positioning Method Of Conveyor Belt For Peanut,
2021
Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry and Food Machinery and Equipment, College of Mechanical Engineering, Tianjin 300222, China;Tianjin University of Science & Technology, Tianjin 300222, China
Research On Precise Positioning Method Of Conveyor Belt For Peanut, Gu Lin-Feng, Li Ya, Ding Yan-Yu, Sun Ke
Food and Machinery
A precise positioning method for peanut ellipsoid target with gravity center height compensation is proposed, which is suitable for field operation. This method optimizes the field calibration steps and completes the belt plane calibration with the help of self-made high-precision calibration block. The ellipse contour curve of peanut was fitted by the direct least square method, and the short half axis size was corrected again. The horizontal plane of the conveyor belt was taken as the reference, and the actual center of gravity of peanut was mapped to make positioning compensation. Grasping success rate increased from 87% to 97%. Field …
The Anti-Oxidation Activity Of L-Linalool And Its Effect On The Skin Aging,
2021
Hunan Province Food & Industry Products Manufacturing Licensing Inspection Center, Changsha, Hunan 410000, China
The Anti-Oxidation Activity Of L-Linalool And Its Effect On The Skin Aging, Chen Geng
Food and Machinery
The aging mice model were built by subcutaneous injection of D-galactose. Different content of L-linalool essential oil (2.5%, 5.0% and 7.5%) was applied to the depilated skin of the back of aging mice for 30 days, and vitamin E was used as positive control. The mice's autonomous activities were monitored, and the distribution of wrinkles on the back skin was observed. The activity of superoxide dismutase (SOD) and the content of malondialdehyde (MDA) were detected in the serum and skin of the drug application site, and the content of water and hydroxyproline (Hyp) in the skin was also detected. The …
Study On Ultrasound-Assisted Extraction Of Polysaccharides From Red Bean Polysaccharides And Its Biological Activity,
2021
Wuhan Huanghelou Flavors and Fragrances Co., Ltd., Wuhan, Hubei 430040, China
Study On Ultrasound-Assisted Extraction Of Polysaccharides From Red Bean Polysaccharides And Its Biological Activity, Shao Pei, Zhuang Hu, Xie Chao, Chen Sheng
Food and Machinery
Using ultrasonic-assisted water extracted red bean polysaccharides as raw materials, response surface methodology was used to optimize the extraction process, and its antioxidant and antibacterial activities were evaluated. Response surface analysis results shown that the best extraction process for red bean polysaccharides is material-to-liquid ratio with 1∶26 (g/mL), ultrasonic temperature with 51 ℃, ultrasonic time with 94 min, the extraction rate of polysaccharide under these optical conditions is (9.92±0.04)%, which is basically consistent with the predicted value of the model. Red bean polysaccharides possesses strong total reducing ability and ability to remove ·OH and ABTS+·, and the removal …
Ultrasonic Enzymatic Extraction Of Total Flavonoids From Saussurea Involucrata Leaves And Its Antioxidant Capacity Analysis,
2021
College of Food and Technology, Sichuan Tourism College, Chengdu, Sichuan 610100, China
Ultrasonic Enzymatic Extraction Of Total Flavonoids From Saussurea Involucrata Leaves And Its Antioxidant Capacity Analysis, Ji De-Rong, Liu Song-Qi, Xiong Kun-Yan, Li Meng, Hu Ming-Hu
Food and Machinery
Optimization of ultrasonic enzymatic extraction of total flavonoids from Saussurea involucrata leaves was studied by single factor and response surface experiments. The antioxidant capacity of the total flavonoids extracted from the leaves of S. involucrata was evaluated using the scavenging rate and total reducing power of DPPH·. The results showed that the best technology of total flavonoids from S. involucrata leaves by ultrasonic enzyme method was: adding the crushed leaves of S. involucrata to 30% ethanol solution, with the material liquid ratio 1∶60 (g/mL) and the ultrasonic treatment at 50 ℃, for 12 min. After adjusting the pH to 4.8, …
Studies On Screening Of High-Yield Phytase-Producing Lactic Acid Bacteria And Its Low-Phytate Nutritional Breads Through Black Bean Sourdough Fermentation,
2021
State Key of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Studies On Screening Of High-Yield Phytase-Producing Lactic Acid Bacteria And Its Low-Phytate Nutritional Breads Through Black Bean Sourdough Fermentation, Cao Wei-Chao, Luo Kun, Cheng Xin, Chen Cheng, Zheng Jian-Xian, Huang Wei-Ning, Li Ning, Filip Arnaut, Zhou Li-Yuan
Food and Machinery
In this study, a strain of lactic acid bacteria (LAB) L-19 with high phytase activity selected from spontaneous fermentation black bean substrate was used as starter to prepare black bean sourdough. The fermentation process of black bean sourdough was optimized by response surface design. The growth of LAB and acidity of the sourdough were investigated in the work, and the molecular weight distribution of peptides and the degradation ratio of anti-nutritional factors (ANF) were analyzed during sourdough fermentation. Meanwhile, the baking characteristics of black bean sourdough bread were evaluated. The results showed that LAB L-19 with phytase-producing capacity was identified …
Influences Of Cut Tobacco Width On Physical Indexes, Mainstream Smoke And Sensory Quality Of Slim Cigarette,
2021
Golden Leaf Production and Manufacturing Center, China Tobacco Henan Industrial Co., Zhengzhou, Henan 450000, China
Influences Of Cut Tobacco Width On Physical Indexes, Mainstream Smoke And Sensory Quality Of Slim Cigarette, Guo Hua-Cheng, Wu Yan-Yan, Zhang Jun-Song, Zhu Yuan-Yang, Gao Hai-Min, Zou Yan-Xie, Li Rui-Li
Food and Machinery
Under the same other manufacturing conditions, cut tobacco structure, slim cigarette physical quality, mainstream smoke components and sensory quality were analyzed with different cutting widths such as 0.6, 0.7, 0.8, 0.9, 1.0 mm. The influence of cutting width on cut tobacco structure, physical indexes, mainstream smoke content and sensory quality of slim cigarette was explored. The results were showed as follows: ① In the range of 0.6～1.0 mm, whole cut rate was positively correlated with cutting width, and broken cut rate was negatively with cutting width. ② There were all significant negative correlations between draw resistance, total ventilation rate, tar …
Research Progress Of Plant-Derived Antifungal Peptides,
2021
College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China; National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Jinzhou, Liaoning 121013, China; National R &D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
Research Progress Of Plant-Derived Antifungal Peptides, Wang Xiao-Mi, Lv Xin-Ran, Bai Feng-Ling
Food and Machinery
This review summarized the sources and structures of plant-derived AFPs, focusing on the objects and mechanisms of action of plant-derived AFPs with different structures, and the application status of plant-derived AFPs in food and crops was summarized, aiming to supply references for further research on AFPs.
Research Progress On The Extraction And Purification Technology Of Apple Polyphenols,
2021
College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China
Research Progress On The Extraction And Purification Technology Of Apple Polyphenols, Xu Xian-Meng, Zhang Zeng-Shuai, Guo Jun-Hua, Lu Jun
Food and Machinery
The article summarized the research progress on the latest developments in the extraction and purification technology of apple polyphenols.In this review, the extraction and purification methods of apple polyphenols are discussed. Solvent extraction, ultrasonic assisted extraction, microwave assisted extraction, supercritical CO2 fluid extraction, biological enzymatic extraction, the high pressure assisted extraction, solid phase extraction, the macroporous adsorption resin separation, high performance liquid chromatography, high speed countercurrent chromatography, ion exchange chromatography, gel chromatography is outlined. And, the extraction and purification methods of green pollution-free, low cost, high yield, high purity, high quality integrated technology research direction was put forward.
Improved Boreal Forest Wildfire Fuel Type Mapping In Interior Alaska Using Aviris-Ng Hyperspectral Data,
2021
University of Alaska, Fairbanks
Improved Boreal Forest Wildfire Fuel Type Mapping In Interior Alaska Using Aviris-Ng Hyperspectral Data, Christopher William Smith, Santosh K. Panda, Uma Suren Bhatt, Franz J. Meyer
Aspen Bibliography
In Alaska the current wildfire fuel map products were generated from low spatial (30 m) and spectral resolution (11 bands) Landsat 8 satellite imagery which resulted in map products that not only lack the granularity but also have insufficient accuracy to be effective in fire and fuel management at a local scale. In this study we used higher spatial and spectral resolution AVIRIS-NG hyperspectral data (acquired as part of the NASA ABoVE project campaign) to generate boreal forest vegetation and fire fuel maps. Based on our field plot data, random forest classified images derived from 304 AVIRIS-NG bands at Viereck …
Hemp Production Network Effects: Are Producers Tipped Toward Suboptimal Varietal Selection By Their Neighbors?,
2021
Utah State University
Hemp Production Network Effects: Are Producers Tipped Toward Suboptimal Varietal Selection By Their Neighbors?, Tanner Mccarty, Jeffrey Young
Journal of Applied Farm Economics
The 2018 farm bill removed industrial hemp from the Schedule 1 Controlled Substance List. In response, states scrambled to enact hemp legislation. Some hemp flower producers report their hemp fields were cross- pollinated by a neighbor growing a different hemp cultivar. For hemp flower crops, cross- pollination reduces cannabinoid concentration levels within the flower; these concentration levels dictate flower price. We show that in a repeated game, once a sufficiently large percentage of growers decide to plant hemp fiber/seed crops, cross-pollination forces flower growers to convert to fiber/seed to avoid the negative network externality. Over time, a stable, suboptimal Nash …
Agricultural Data Management And Sharing: Best Practices And Case Study,
2021
Rowan University
Agricultural Data Management And Sharing: Best Practices And Case Study, Eli K. Moore, Adam Kriesberg, Steven Schroeder, Kerrie Geil, Inga Haugen, Carol Barford, Erica M. Johns, Dan Arthur, Megan Sheffield, Stephanie M. Ritchie, Carolyn Jackson, Cynthia Parr
School of Earth & Environment Departmental Research
Agricultural data are crucial to many aspects of production, commerce, and research involved in feeding the global community. However, in most agricultural research disciplines standard best practices for data management and publication do not exist. Here we propose a set of best practices in the areas of peer review, minimal dataset development, data repositories, citizen science initiatives, and support for best data management. We illustrate some of these best practices with a case study in dairy agroecosystems research. While many common, and increasingly disparate data management and publication practices are entrenched in agricultural disciplines, opportunities are readily available for promoting …
The Biden Climate Plan,
2021
University of Nebraska-Lincoln
The Biden Climate Plan, J. David Aiken
Cornhusker Economics
President Obama had an aggressive climate plan that included regulation of carbon emissions from power plants. Hillary Clinton would have continued with aggressive policies to slow and reverse global warming but was defeated by Donald Trump in 2016. President Trump sought to undo most of President Obama’s climate policies and pursued a fossil-fuel friendly energy and climate policy. The 2020 election of President Biden marks a resumption of ambitious policies to slow and ultimately reverse global warming. This newsletter identifies three major policies the Biden administration is expected to pursue and attempts to explain what policy implication might look like.
The Inverse Relationship Between Solar-Induced Fluorescence Yield And Photosynthetic Capacity: Benefits For Field Phenotyping,
2021
University of Illinois Urbana-Champaign
The Inverse Relationship Between Solar-Induced Fluorescence Yield And Photosynthetic Capacity: Benefits For Field Phenotyping, Peng Fu, Katherine Meacham-Hensold, Matthew H. Siebers, Carl J. Bernacchi
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Improving photosynthesis is considered a promising way to increase crop yield to feed a growing population. Realizing this goal requires non-destructive techniques to quantify photosynthetic variation among crop cultivars. Despite existing remote sensing-based approaches, it remains a question whether solar-induced fluorescence (SIF) can facilitate screening crop cultivars of improved photosynthetic capacity in plant breeding trials. Here we tested a hypothesis that SIF yield rather than SIF had a better relationship with the maximum electron transport rate (Jmax). Time-synchronized hyperspectral images and irradiance spectra of sunlight under clear-sky conditions were combined to estimate SIF and SIF yield, which were then correlated …
