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Articles 40261 - 40290 of 255929

Full-Text Articles in Life Sciences

Research Progress On Degradation Of Aflatoxin B1 By Microbial Method According To Toxicity Sites Of Aflatoxin B1, Lian Sheng-Qing, Qian Xin, Liu Chu-Cen, Li Liang-Yi, Sun Chang-Po, Zhou Wen-Hua Apr 2023

Research Progress On Degradation Of Aflatoxin B1 By Microbial Method According To Toxicity Sites Of Aflatoxin B1, Lian Sheng-Qing, Qian Xin, Liu Chu-Cen, Li Liang-Yi, Sun Chang-Po, Zhou Wen-Hua

Food and Machinery

The toxicity sites and toxicity mechanism of aflatoxin B1（AFB1） were explored in this study, and aiming at the toxicity sites of AFB1, the advantages of microbial degradation of AFB1 were compared. Then the degradation mechanism of AFB1 by detoxifying enzyme method in microbial method was reviewed. Moreover, the composite application of detoxification enzyme method combined with other methods is prospected.

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Toward The Design, Synthesis, And Characterization Of Abiotic Coiled-Coil Peptides Via Solid-Phase Copper-Catalyzed Azide-Alkyne Cycloaddition (Sp-Cuaac) Click Reaction For The Preparation Of Controlled Self-Assembly Molecular Building Block, Liaquat Ali Apr 2023

Toward The Design, Synthesis, And Characterization Of Abiotic Coiled-Coil Peptides Via Solid-Phase Copper-Catalyzed Azide-Alkyne Cycloaddition (Sp-Cuaac) Click Reaction For The Preparation Of Controlled Self-Assembly Molecular Building Block, Liaquat Ali

Chemistry Theses

The production of cutting-edge materials, the development of novel medications, drug delivery systems, technological advancements, and biosynthesizing all depend on molecular building blocks. Proteins are required for the creation of intricate, well-organized structures, and coiled-coil protein domains are vital subunits for the oligomerization of protein complexes, gene expression, and the structural components of biological materials. The numerous interactions between a wide variety of amino acids make it difficult to assemble protein complexes with a particular shape. In the current study, we successfully designed and synthesized four different 32-residue peptides, each of which had two modified amino azide residues. These peptides …

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Mountain Wetland Soil Carbon Stocks Of Huascarán National Park, Peru, Rodney Chimner, Sigrid Resh, John A. Hribljan, Michael Battaglia, Laura Bourgeau-Chavez, Gillian Bowser, Erik A. Lilleskov Apr 2023

Mountain Wetland Soil Carbon Stocks Of Huascarán National Park, Peru, Rodney Chimner, Sigrid Resh, John A. Hribljan, Michael Battaglia, Laura Bourgeau-Chavez, Gillian Bowser, Erik A. Lilleskov

Michigan Tech Publications, Part 1

Although wetlands contain a disproportionately high amount of earth’s total soil carbon, many regions are still poorly mapped and with unquantified carbon stocks. The tropical Andes contain a high concentration of wetlands consisting mostly of wet meadows and peatlands, yet their total organic carbon stocks are poorly quantified, as well as the carbon fraction that wet meadows store compared to peatlands. Therefore, our goal was to quantify how soil carbon stocks vary between wet meadows and peatlands for a previously mapped Andean region, Huascarán National Park, Peru. Our secondary goal was to test a rapid peat sampling protocol to facilitate …

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The Impact Of Positive Psychology Interventions On College Students' Mental Health, Kaitlin Dobson Apr 2023

The Impact Of Positive Psychology Interventions On College Students' Mental Health, Kaitlin Dobson

Student Research Design & Innovation Symposium

The focus of this research is on the powerful impact positive psychology interventions can have on college students that may be struggling with maladaptive thoughts or mental health concerns. Specifically, college students have experienced a large increase in mental health diagnoses, especially since the COVID-19 pandemic. Positive psychology is one of the newest fields within the world of psychology, which focuses on enhancing well-being through an individual's existing strengths. The relationship between mental health and positive psychology interventions will be supported by several recently published and peer-reviewed journal articles that embody the characteristics of positive psychology. For this research, the …

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Notes On Lung Development In South African Ghost Frogs (Anura: Heleophrynidae), Jackson R. Phillips, Jens Reissig, Gary Kyle Nicolau Apr 2023

Notes On Lung Development In South African Ghost Frogs (Anura: Heleophrynidae), Jackson R. Phillips, Jens Reissig, Gary Kyle Nicolau

Biology Student Research

Lungs are a prototypical trait of most tetrapods, but some amphibians have become secondarily lungless over evolutionary time. Anuran (frog) tadpoles offer an opportunity to examine lung loss from an evolutionary perspective, because there are many independent instances where lungs are not inflated until adulthood, and so are functionally lost. Lung loss is typically associated with living in fast-flowing streams, and so we examined larval lung development in the stream specialist family Heleophrynidae. We find that one genus, Hadromophryne Van Dijk, 2008, has large lungs as tadpole, while the other genus, Heleophryne Sclater, 1898, has much smaller, stunted lung buds. …

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Pyrus Calleryana Extracts Reduce Germination Of Native Grassland Species, Suggesting The Potential For Allelopathic Effects During Ecological Invasion, Michaela J. Woods, Jonathan T. Bauer, Dena Schaeffer, Ryan W. Mcewan Apr 2023

Pyrus Calleryana Extracts Reduce Germination Of Native Grassland Species, Suggesting The Potential For Allelopathic Effects During Ecological Invasion, Michaela J. Woods, Jonathan T. Bauer, Dena Schaeffer, Ryan W. Mcewan

Biology Faculty Publications

Invasive plant species’ success may be a result of allelopathy, or the release of secondary metabolites that are harmful for surrounding plant species. Allelopathy can be mediated through the abiotic environment by chemical sorption or transformation, so the substrate on which interactions occur can lead to differential outcomes in allelopathic potential. One aggressive invader, Pyrus calleryana, has become dominant in many ecosystems throughout Eastern US, and has reduced the abundance of native species where it invades. Thus, our goal was to identify if P. calleryana had allelopathic potential by testing the impact of leaf and flower leachate on gemination …

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Impact Of Nutrient Resorption On The Fitness And Growth In Iva Frutescens, Salt Marsh Elder, Juliane Bravo-Perez, Devon Gravel, Ryan Tainsh Apr 2023

Impact Of Nutrient Resorption On The Fitness And Growth In Iva Frutescens, Salt Marsh Elder, Juliane Bravo-Perez, Devon Gravel, Ryan Tainsh

Student Research Design & Innovation Symposium

Nutrient resorption, a nutrient conservation mechanism used by deciduous plants, was investigated in Iva frutescens, a woody salt marsh perennial. To address the impact of nutrient resorption on the fitness and growth in the model organism, a field and laboratory study was undertaken. During the Fall of 2022, seed material and growth measurements were collected from ten replicate Iva frutescens plants at four salt marsh habitats along the coast of Narragansett Bay, RI. Collected seed material was dried to constant mass, manually sorted to purify seed sample, and weighed. In addition, a subsample of 100 seeds from five individuals from …

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Multi-Modal, Assistive, And Augmentive Neurological Based Therapy And Rehabilitation Device, Abigail Medeiros, Jonah Mcgowan Apr 2023

Multi-Modal, Assistive, And Augmentive Neurological Based Therapy And Rehabilitation Device, Abigail Medeiros, Jonah Mcgowan

Student Research Design & Innovation Symposium

This project focuses on the design of a prototype, with the objective to create an assistive and augmentative game-based physical therapy device. This prototype was designed to aid in the physical therapy process by providing a specialized mode of assessment for clients with conditions that impact range of motion in the shoulder, such as a rotator cuff injury, traumatic brain injury, or a stroke. The device incorporates touch capacity textiles, washable microprocessors, and conductive thread to accurately assess range-of-motion through lateral shoulder abduction and other upper extremity movements that are severely diminished with these injuries. Angle measurements were calculated for …

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Wearable Assistive Communication Device, Johanna Wunder, Zakary Vallee, Jeffrey Tagen, Nicole Urban Apr 2023

Wearable Assistive Communication Device, Johanna Wunder, Zakary Vallee, Jeffrey Tagen, Nicole Urban

Student Research Design & Innovation Symposium

The purpose of this project was to develop a portable and customizable device that encouraged communication through affordable technologies. The device was designed to fill a well-defined need for affordable technologies that enhance multifaceted therapeutic and assistive healthcare services. The device was created to operate without sound which increases the accessibility of assistive and rehabilitative technologies, specifically for deaf, hearing impaired, and sound-averse individuals, including many on the Autism spectrum. In the design process, we focused on the development of the devices fabric housing and touch areas utilizing smart textiles and conductive thread. Smart textiles, such as touch capacitive fabrics, …

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The War In Ukraine, Food Security And The Role For Europe, Maksym Chepeliev, Maryla Maliszewska, Maria Filipa Seara E Pereira Apr 2023

The War In Ukraine, Food Security And The Role For Europe, Maksym Chepeliev, Maryla Maliszewska, Maria Filipa Seara E Pereira

Department of Agricultural Economics Faculty Publications

Food-security implications of the war in Ukraine are exacerbated by adverse weather events, spillover effects from the distortion of energy and fertiliser markets, and domestic policies that countries around the world have implemented in pursuit of food security. Estimates suggest that the cumulative effect of these channels in terms of restricting agricultural and food trade is in the order of over 10 times larger, and their cumulative effect on global food supply is on average three times more substantial than the direct agricultural supply disruptions in Ukraine. The latter, however, disproportionally impacts low-income countries that are particularly vulnerable to food …

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Progress In The Application Of Nano-Antibody In The Detection Of Small Molecular Contaminants In Food, Jin Ping, Ding Hong-Liu, Jin Xiao-Hong, Shen Qi-Liang, Fan Chun-Yan Apr 2023

Progress In The Application Of Nano-Antibody In The Detection Of Small Molecular Contaminants In Food, Jin Ping, Ding Hong-Liu, Jin Xiao-Hong, Shen Qi-Liang, Fan Chun-Yan

Food and Machinery

The structure and characteristics of nano-antibody and their applications in the detection of mycotoxins, pesticide and veterinary drug residues, small molecule toxic substances and other small molecule pollutants were introduced, and the development direction of nano-antibody in biological detection technology and diagnosis research was prospected.

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Preparation Of Antioxidant Hydrolysate Of Agaricus Blazei Murill, Chen Zhuo-Juan, Ke Xiu-Xian, Huang Xiao Apr 2023

Preparation Of Antioxidant Hydrolysate Of Agaricus Blazei Murill, Chen Zhuo-Juan, Ke Xiu-Xian, Huang Xiao

Food and Machinery

Objective: This study aimed to investigate the technological conditions for the preparation of antioxidant hydrolysate of Agaricus blazei Murill and analyze the nutritional components of the hydrolysate. Methods: Papain, cellulase and pectinase were prepared in mpapain∶mcellulase∶mpectinase ratio of 3∶4∶4 to dissolve the fruiting bodies of A. blazei. Response surface test was used to optimize the enzymatic hydrolysis process of A. blazei. Results: The optimal conditions of compound enzyme hydrolysis were as follows: compound enzyme dosage 0.5%, pH 6.2, hydrolysis temperature 49 ℃, hydrolysis time 147 min. Under these conditions, when the concentration of A. blazei …

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Shannon V Nelson 2023 Dissertation Supplementary Data, Shannon Nelson, Neil C. Hansen, Matthew D. Madsen, Val Jo Anderson, Dennis L. Eggett, Bryan G. Hopkins Apr 2023

Shannon V Nelson 2023 Dissertation Supplementary Data, Shannon Nelson, Neil C. Hansen, Matthew D. Madsen, Val Jo Anderson, Dennis L. Eggett, Bryan G. Hopkins

ScholarsArchive Data

This data set includes soil matric potential and temperature data for a field trial at the Utah Test and Training Range (UTTR) evaluating the use of banded superabsorbent polymer (SAP) to increase soil moisture and seedling establishment in rangeland restoration.

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Study Budgets In Human Anatomy And Physiology Students: Assessments Of Time On Tasks As Affected By Student Motivation And Assessment Weighting, Mattie C. Derivaux Apr 2023

Study Budgets In Human Anatomy And Physiology Students: Assessments Of Time On Tasks As Affected By Student Motivation And Assessment Weighting, Mattie C. Derivaux

Honors Theses

The extent to which a student is motivated, along with the root of that motivation, can significantly influence the nature of a student’s experience in a course, especially in a rigorous science course such as Human Anatomy and Physiology (HAP). Students’ perceptions of specific course elements, coupled with how they perceive their purposes, can alter their motivation to succeed, which in turn can affect their performance. This study sought to analyze student motivation in an undergraduate HAP course at the University of Mississippi by focusing on students’ attitudes towards the weight distribution of course assessments, effort exertions, and time allotted …

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Design And Experiment Of Multi-Station Automatic Powder Loading System Based On Fuzzy Control, Mou Xiang-Wei, Nan Xiang-Gang, Yu Xin-Ye, Chen Lin-Tao Apr 2023

Design And Experiment Of Multi-Station Automatic Powder Loading System Based On Fuzzy Control, Mou Xiang-Wei, Nan Xiang-Gang, Yu Xin-Ye, Chen Lin-Tao

Food and Machinery

Objective: In view of the technical problems such as low efficiency and difficult automatic control of the automatic powder production line for factory rice noodle production. Methods: This research proposed a multi-station automatic powder loading system based on fuzzy control, selecting the deviation E1 between the detected value of the powder height and the preset value, the deviation change rate EC1 and the deviation between the current position of the powder loading car and the position to be loaded. The absolute value E2 was used as the input variable, and the motor speed U1 and the …

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Simulation Study Of Factors Influencing Oil Yield During Cold Pressing Of Rapeseed, Huang Tao, Song Shao-Yun, Zhang Heng, Yin Fang Apr 2023

Simulation Study Of Factors Influencing Oil Yield During Cold Pressing Of Rapeseed, Huang Tao, Song Shao-Yun, Zhang Heng, Yin Fang

Food and Machinery

Objective: This study aimed to investigate the factors influencing the oil yield of rapeseed during pressing in a double screw oil press. Methods: To simulate the pressing process of rapeseed and to explore the effects of two factors, the speed of the press screw and the porosity, on the oil yield. Results: The oil yield of rapeseed was linearly related to the porosity, and a larger porosity, was associated with a lower oil yield. Moreover, the oil yield was negatively related to the speed of the press screw. Conclusion: The oil yield of rapeseed was highest when the porosity was …

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Design Of Real-Time Detecting System For Grain Moisture In Dryer, Hu Yong, Jiang Yong-Cheng Apr 2023

Design Of Real-Time Detecting System For Grain Moisture In Dryer, Hu Yong, Jiang Yong-Cheng

Food and Machinery

Objective: To reduce grain mildew caused by high water content in storage. Methods: The function model of water content and detection frequency is determined by data measurement in multiple sites. A real-time monitoring system of grain moisture value in the dryer was designed based on STM32 microcontroller. Through the design of parallel plate sensor to detect the change value of capacitance of grain with different moisture content, through the hardware circuit to convert the capacitance value into frequency value. Through the single-chip microcomputer calculation can get the real-time moisture content of grain inside the dryer, and then through RS485 communication …

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Finite Element Analysis Of Box Grid Magnetic Iron-Separator And Its Application In Milk Powder Production, Cheng Jian-Bo, Chen Bao-Ku, Li Hui, Guo Lin, Wang Yan, Sun Li-Rui Apr 2023

Finite Element Analysis Of Box Grid Magnetic Iron-Separator And Its Application In Milk Powder Production, Cheng Jian-Bo, Chen Bao-Ku, Li Hui, Guo Lin, Wang Yan, Sun Li-Rui

Food and Machinery

Objective: The optimal design scheme of box grid magnetic iron-separator in milk powder production process was explored. Methods: In this study, the working principle of the box grid magnetic iron-separator was explored by using the finite element simulation analysis method under real production conditions in a fully simulated milk powder plant. Through the single factor test, the effects of material drop height, the type of metal foreign matter, the field strength, and the net distance of the magnetic bar on the effective interception rate of the box grid magnetic iron-separator were explored, and the design solution was optimized by using …

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Anti-Inflammatory Activity Of Cili Extracts And Its Therapeutic Effect On Ulcerative Colitis Model Of Mice, Wang Li, Li Li-Lang, Li Qi-Ji, Wang Yu, Yang Xiao-Sheng Apr 2023

Anti-Inflammatory Activity Of Cili Extracts And Its Therapeutic Effect On Ulcerative Colitis Model Of Mice, Wang Li, Li Li-Lang, Li Qi-Ji, Wang Yu, Yang Xiao-Sheng

Food and Machinery

Objective: This study aimed to investigate the effect of Cili extracts in the treatment of enteritis and diarrhea. Methods: The RAW 264.7 cells were treated with different concentrations (1.25, 2.50, 5.00, 10.00, 20.00 μg/mL) of Cili extracts, and then the cell viability was determined by MTT method. RAW264.7 cells were treated with different concentrations of Cili extracts, and then lipopolysaccharide (LPS) was used to induce the cell inflammation model. The content of NO in cell culture supernatant was detected by Griess method. The UC mice model was induced by 3% DSS. The changes of signs during the modeling and drug …

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Effect Of Aqueous Extract With Areca Catechu Pedicle On Mycelial Quality And Antioxidant Activity Of Three Edible Fungi, Bao Yi-Hong, Lai Zhang-Fei, Ma Yin-Peng, Jia Yu-Tong, Pan Fei-Bing, Kuang Feng-Jiao Apr 2023

Effect Of Aqueous Extract With Areca Catechu Pedicle On Mycelial Quality And Antioxidant Activity Of Three Edible Fungi, Bao Yi-Hong, Lai Zhang-Fei, Ma Yin-Peng, Jia Yu-Tong, Pan Fei-Bing, Kuang Feng-Jiao

Food and Machinery

Objective: In order to reuse the Areca catechu by-product—A. catechu pedicle, and improve the quality of mycelium of edible fungi, the effect of the pedicle aqueous extract on the liquid fermentation of edible fungi was investigated. Methods: Pleurotus ostreatus, Pleurotus citrinopileatus Singer, and Flammulina velutiper were selected as the test strains, and the effects of the addition of A. catechu pedicle aqueous extract on the quality of mycelium and the activity of enzymes related to the growth and metabolism of the three strains were investigated, by using mycelial growth rate, biomass, mycelial active ingredients and antioxidant activity as indicators. Results: …

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The Nutritional Components And Health Benefits Of Zizania Latifolia, Feng Xiao-Lan Apr 2023

The Nutritional Components And Health Benefits Of Zizania Latifolia, Feng Xiao-Lan

Food and Machinery

This review summarized the domestic and abroad research progress of Zizania latifolia in recent years, from the aspects of its nutritional components, health effects, bioactive mechanisms and future research priorities. Moreover, the further research, development and comprehensive utilization of Z. latifolia were also prospected.

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Effects Of Soaking And Gelatinization Process On The Quality Of Semi-Dry Rice Noodles, Zhou Yong-Sheng, Li You, Zhao Hai-Yan, Long Yong-Yi, Jiang Cai-Yun, Cai Ji-Xiang Apr 2023

Effects Of Soaking And Gelatinization Process On The Quality Of Semi-Dry Rice Noodles, Zhou Yong-Sheng, Li You, Zhao Hai-Yan, Long Yong-Yi, Jiang Cai-Yun, Cai Ji-Xiang

Food and Machinery

Objective: The main objective of this study was to optimize the soaking and gelatinization process of semi-dry rice noodles. Methods: Taking semi-dry rice noodles as the research object, the effects of soaking temperature, soaking time, gelatinization temperature, gelatinization time and water addition amount on the cooking loss rate and texture characteristics were analyzed, and the better soaking process and gelatinization process were obtained. Results: Soaking temperature 40 ℃, soaking time 2 h, gelatinization temperature 90 ℃, gelatinization time 8 min, water addition 70% were the best process conditions. The semi-dry rice noodles prepared under the optimal process has better cooking …

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Reproducibility Evaluation Of Soybean Oligopeptides Based On Peptidomic Analyses, Yu Xiao-Yi, Xu Ju-Cai, Wu Ying, Liu Wan-Shun, Guo Dan, Li Xiao-Min Apr 2023

Reproducibility Evaluation Of Soybean Oligopeptides Based On Peptidomic Analyses, Yu Xiao-Yi, Xu Ju-Cai, Wu Ying, Liu Wan-Shun, Guo Dan, Li Xiao-Min

Food and Machinery

Objective: This study aimed to analyze the peptide composition and evaluate the reproducibility of the soybean oligopeptides. Methods: High performance liquid chromatography tandem high resolution mass spectrometry was employed for peptidomic analysis of the soybean oligopeptides prepared at the same condition at different batches. Generality and individuality of the samples were also discussed based on the heat map analysis and principal component analysis （PCA）. Results: About 1 000 peptides were identified from each of the materials and most of them were short peptides. From the set analysis, 101 peptides were found of detectability from all samples, but there were also …

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Application Of Novel Processing Technology In The Preparation Of Antioxidant Peptides, Xu Chen-Chen, Zhu Bao-Hua, Yang Zhi-Yan, Hui Ting-Ting, Li Yan, Li Xiao-Hui Apr 2023

Application Of Novel Processing Technology In The Preparation Of Antioxidant Peptides, Xu Chen-Chen, Zhu Bao-Hua, Yang Zhi-Yan, Hui Ting-Ting, Li Yan, Li Xiao-Hui

Food and Machinery

In this review, the mechanism and characteristics of antioxidant peptides prepared by novel processing technologies such as microwave, ohmic heating, subcritical water, ultrasonic wave, high static pressure and pulsed electric field were summarized. The process and effectiveness of the implementation of these novel processing technologies for protein feedstock pretreatment and auxiliary enzymatic preparation were analyzed, and the advantages and challenges of each novel processing technology for the production of antioxidant peptides were discussed.

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Advances Of Multi-Omics And Its Research Progress In Food, Li Lin, Deng Na, Zhang Bo, Li Hui, Liu Miao, Wang Jian-Hui Apr 2023

Advances Of Multi-Omics And Its Research Progress In Food, Li Lin, Deng Na, Zhang Bo, Li Hui, Liu Miao, Wang Jian-Hui

Food and Machinery

In recent years, omics has received a lot of attention from researchers in the field of food and nutrition because of its prominent role in revealing the mechanisms of complex biochemical actions and macro-regulatory dynamic network systems in living organisms and has been applied to research in the field of food. This paper focuses on the application of genomics, transcriptomics, proteomics and metabolomics in the food field from the basic concept of histology, which is expected to provide a theoretical basis and scientific guidance for the further use of histological tools for food ingredient control, quality improvement and safety mechanism …

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Preparation, Characterization And Functional Analysis Of Casein Gyleq Antioxidant Peptide-Calcium Chelate, Li Rong-Yu, Li Hong, Zheng Peng, Yang Cheng, Qian Sen-He Apr 2023

Preparation, Characterization And Functional Analysis Of Casein Gyleq Antioxidant Peptide-Calcium Chelate, Li Rong-Yu, Li Hong, Zheng Peng, Yang Cheng, Qian Sen-He

Food and Machinery

Objective: Preparation of GYLEQ-Ca chelate with antioxidant activity and calcium supplement function. Methods: On the basis of solid-phase synthesis of GYLEQ antioxidant peptide, the conditions of chelation reaction between casein GYLEQ antioxidant peptide and Ca2+ were optimized by single factor and orthogonal experiment. The structure of GYLEQ-Ca chelate was characterized by IR and SEM. Meanwhile, the in vitro antioxidant activity, calcium retention in simulated gastrointestinal juice of GYLEQ-Ca chelate and its effect on cell viability were analyzed. Results: The optimum conditions for GYLEQ-Ca chelation reaction were temperature 50 ℃, time 40 min, pH 7.5, and peptide-calcium mass ratio 4∶1. …

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Determination Of Altrenogest Residue In Pig Edible Tissue By A High Performance Liquid Chromatography-Tandem Mass Spectrometry Method, Ni Xiang-Yan, Sun Nian-Xia, Yu Han-Bing, Fang Fang, Sun Zhi-Wen Apr 2023

Determination Of Altrenogest Residue In Pig Edible Tissue By A High Performance Liquid Chromatography-Tandem Mass Spectrometry Method, Ni Xiang-Yan, Sun Nian-Xia, Yu Han-Bing, Fang Fang, Sun Zhi-Wen

Food and Machinery

Objective: To determinate the residues of altrenogest in porcine edible tissues （muscle, liver, fat）, a high performance liquid chromatography-tandem mass spectrometry （LC-MS/MS） method was established. Methods: The samples were hydrolyzed with β-glucuronidase/arylsulfase, extracted by acetonitrile （ACN）, purified by PRiME HLB solid phase extraction column. LC separation was performed with Waters UPLC BEH C18 reversed-phase chromatography with a linear gradient elution of acetonitrile （ACN）-0.1% formic acid （FA） as the mobile phase. The samples were detected by electrospray in positive ion mode. Results: The pregnancin in tissues were quantified in the range of 1～50 μg/L with good linearity and high linear …

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Detection Method Of Defective Coffee Beans Based On Yolov5, Zhang Cheng-Yao, Zhang Yan-Cheng, Zhang Yu-Qian, Zhao Yu-Qing Apr 2023

Detection Method Of Defective Coffee Beans Based On Yolov5, Zhang Cheng-Yao, Zhang Yan-Cheng, Zhang Yu-Qian, Zhao Yu-Qing

Food and Machinery

Objective: To realize the defect detection of coffee beans. Methods: An improved YOLOv5s network was proposed to embed different attention mechanism modules and activation functions with YOLOv5s as the baseline network. Results: The mean accuracy of the CBAM module and the activation function Hardswish improved by 5.3% and 2.9%, respectively, compared with the baseline network. After 200 iterations of training, the model accuracy was 99.5%, the average accuracy was 97.6%, the recall was 0.98, the recognition rate was 64 amplitude/s, and the model size was 15 M. Conclusion: Compared with Faster RCNN, SSD, YOLOv3, YOLOv4 and YOLOv5s, the test algorithm …

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Design Of Grading And Sorting Mechanical System For Pleurotus Eryngii Based On Differential Separation Principle, Lin Xin-Hua, Li Yue-Dan, Zhu Ya-Nan, Zhou Zhu, Chen Xue-Yong Apr 2023

Design Of Grading And Sorting Mechanical System For Pleurotus Eryngii Based On Differential Separation Principle, Lin Xin-Hua, Li Yue-Dan, Zhu Ya-Nan, Zhou Zhu, Chen Xue-Yong

Food and Machinery

Objective: In order to effectively solve the problems of low efficiency, quality fluctuation and increasing labor cost of artificial sorting. Methods: A mechanical system based on differential separation principle was designed to complete the classification and separation device of Pleurotus eryngii, and the differential separation principle was introduced and modeled. Results: The test prototype was built and the principle verification test was completed. The success rate of separation of special mushroom was 99.5%, and that of other varieties was 100%. Conclusion: The test device can achieve good differential separation effect.

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Motion Parameter Optimization Of Reciprocating Vibrating Screen Based On Discrete Element Method, Ren Ning, Wang Zhong-Ying, Bai Xiao-Li, Wu Wen-Bin Apr 2023

Motion Parameter Optimization Of Reciprocating Vibrating Screen Based On Discrete Element Method, Ren Ning, Wang Zhong-Ying, Bai Xiao-Li, Wu Wen-Bin

Food and Machinery

Objective: To determine the precise quantitative relationship between screening efficiency and motion parameters for reciprocating vibrating screen, and to obtain the movement parameters with the optimal screening efficiency. Methods: Rocky was adopted to accurately simulate the movement behavior for wheat grain and wheat stem in the screening process, many factors orthogonal simulation test was used to investigate the effect of vibration frequency, amplitude, vibrating direction angle and screen surface inclination angle on screening efficiency. Results: The movement behaviors of wheat in the screening process was consistent with the theory analysis, which verified the correctness and feasibility of numerical simulation using …

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