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Research Progress On Classification , Biosynthesis , Functions And Applications Of Aminobutyric Acids, Liu Jun, Cheng Yunhui, Shuai Fucheng, Gao Chun, Lin Qinlu
Research Progress On Classification , Biosynthesis , Functions And Applications Of Aminobutyric Acids, Liu Jun, Cheng Yunhui, Shuai Fucheng, Gao Chun, Lin Qinlu
Food and Machinery
Aminobutyric acids are a class of four -carbon non -protein amino acids that can be classified into three isomers, α-, β-, and γ- aminobutyric acids, according to the position of the amino group on the carbon chain. Due to their diverse biological activities, including anti-inflammatory, neuromodulatory, and plant stress resistance -enhancing activities, these compounds have demonstrated important application value in the fields of food, agriculture, medicine, and the chemical industry. This article systematically summarizes the molecular structural characteristics and core physiological functions of the three aminobutyric acids and quantitatively compares the advantages and disadvantages of various preparation technologies, including chemical …
Sources And Potential Risks Of Micro- And Nanoplastics In Foods, Zhao Xinlong, Li Wei, Zhang Mengling, Xing Liwen, Tian Huafeng
Sources And Potential Risks Of Micro- And Nanoplastics In Foods, Zhao Xinlong, Li Wei, Zhang Mengling, Xing Liwen, Tian Huafeng
Food and Machinery
Plastics are widely used in food packaging, storage, processing, and other food-related applications, playing a vital role in extending food shelf life, reducing material loss, and promoting food circulation. However, these plastic products that come into direct or indirect contact with foods can release micro- and nanoplastics through various physical and chemical processes. These micro- and nanoplastics can accumulate in the human body through bioaccumulation and other pathways and have become one of the emerging contaminants threatening food safety and human health. This review provides a comprehensive summary of the research progress on the generation pathways, release mechanisms, potential health …
Research On Mechanical Properties Of Concrete At High Temperatures Based On Machine Learning, Liu Junhua, Liu Bin, Cao Haifeng, Liu Zhiguang, Li Zhiyong
Research On Mechanical Properties Of Concrete At High Temperatures Based On Machine Learning, Liu Junhua, Liu Bin, Cao Haifeng, Liu Zhiguang, Li Zhiyong
Journal of China & Foreign Highway
Structural safety is directly affected by the mechanical properties of concrete at high temperatures. Firstly, based on the existing compression and tension test data of concrete at high temperatures, the Abaqus finite element software was adopted for numerical simulation reproduction, and the reliability of the simulation method was verified. Secondly, by simulating the uniaxial tension-compression and confining pressure tests of normal concrete with different strength grades under high temperatures of 20‒800 ℃, the influence rules of temperature on the compressive strength, splitting tensile strength, elastic modulus, and stress ‒ strain relationship of concrete were elucidated. Finally, based on three commonly …
Research Progress On Detection Technologies For Florfenicol Residues In Animal-Derived Foods, Hu Xiaofei, Ge Mengjun, Wang Yao, Cai Wenjin, Xing Guangxui
Research Progress On Detection Technologies For Florfenicol Residues In Animal-Derived Foods, Hu Xiaofei, Ge Mengjun, Wang Yao, Cai Wenjin, Xing Guangxui
Food and Machinery
As a broad-spectrum antibiotic, florfenicol is widely used in livestock, poultry and aquaculture. Due to the unregulated use by some enterprises, a large amount of florfenicol residue exists in animal-derived foods. When florfenicol enters the human body through the food chain, it can cause gastrointestinal discomfort, intoxication, and even aplastic anemia. To minimize the effects of florfenicol residues and derivatives in food on human beings, many countries have set strict limits for maximum florfenicol residues in food. Therefore, this paper summarizes the detection methods for florfenicol established in recent years and gives an outlook on their development trends.
Experimental Study On Compressive And Flexural Behaviors Of Pva Fiber-Reinforced Cement Soil, Lu Peng, Lu Bin, Zhang Jiahu, Zhou Siwei, Wang Jin, Hou Lijun
Experimental Study On Compressive And Flexural Behaviors Of Pva Fiber-Reinforced Cement Soil, Lu Peng, Lu Bin, Zhang Jiahu, Zhou Siwei, Wang Jin, Hou Lijun
Journal of China & Foreign Highway
To address the problems of low toughness and poor deformation ability of cement soil, short-chopped polyvinyl a lcohol (PVA) fibers were added to modify and toughen the cement soil in this paper, and unconfined compressive and flexural tests were conducted on the PVA fiber-reinforced cement soil with different cement contents. The results show that compared with plain cement soil, the fiber-reinforced cement soil has stronger compressive deformation capacity, a flatter descending branch of the compressive stress –strain curve, a higher residual stress level, and better compressive toughness. When the cement content increases from 5% to 10%, the overall growth rates …
Research Progress On The Main Nutritional Active Components And Health Functions Of Hickory, Gao Junlong, Wang Chunxiao, Gao Fei, He Kan, Jin Chao, Wu Weijie, Deng Yangyong
Research Progress On The Main Nutritional Active Components And Health Functions Of Hickory, Gao Junlong, Wang Chunxiao, Gao Fei, He Kan, Jin Chao, Wu Weijie, Deng Yangyong
Food and Machinery
Hickory is a natural, pollution-free wild nut that grows in specific natural environments. It is highly favored by consumers for its uniquely crisp and fluffy texture, rich nutritional value, and multiple health benefits. This article provides a comprehensive analysis of the main nutritional and bioactive components of hickory, including proteins and amino acids, fats and fatty acids, vitamins, minerals, dietary fiber, polyphenols, squalene, and phytosterols.These components are compared with those of commonly consumed nut products to clarify the content levels of the primary bioactive nutrients in hickory. It also focuses on the bioactivities and recent research progress related to hickory …
Road Performance And Water-Softening Characteristics Of Stabilized Soil Under Cyclic Loading, Hu Hong, Li Zongheng, Feng Yong, Cao Zhigang, Liu Yaoxing
Road Performance And Water-Softening Characteristics Of Stabilized Soil Under Cyclic Loading, Hu Hong, Li Zongheng, Feng Yong, Cao Zhigang, Liu Yaoxing
Journal of China & Foreign Highway
To effectively deal with waste soil and reduce environmental pollution,this paper took a road engineering project in Shaoxing as the research object and conducted a cyclic triaxial incremental loading test on the undisturbed lime soil under undrained conditions to study the effects of confining pressure,cyclic stress ratio,and water immersion on its performance.The results show that when the cyclic stress ratio increases from 1 to 4,the cumulative strain and resilient strain increase rapidly in the initial loading stage,showing a trend of “stepwise” increase.The cumulative strain produced at a cyclic stress ratio of 2 is about twice that at the cyclic stress …
Bending Moment Calculation And Reinforcement Recommendations For Cast-In-Place Cover Slabs In Slab Culverts, Li Yukun, Wan Kecheng, Fu Fulin
Bending Moment Calculation And Reinforcement Recommendations For Cast-In-Place Cover Slabs In Slab Culverts, Li Yukun, Wan Kecheng, Fu Fulin
Journal of China & Foreign Highway
To address the complexity and lack of practical methods for calculating bending moments of cast-in-place cover slabs in slab culverts,the slabs were simplified as one-way slabs with a pair of opposing edges simply supported and the other pair of edges free.Theoretical formulas for calculating the bending moments within the slabs under uniformly distributed loads were derived using elastic theory.The accuracy of the theoretical formulas was validated through case studies via finite element software.Various combinations of length,width,and fill heights exist in highway projects,making the use of theoretical formulas for bending moment calculations cumbersome.Therefore,a simplified method for calculating maximum bending moments in …
Analysis Of Influence Of Internal Erosion On Deformation Of Subway Station Structure, Qin Tianxin, Wang Chen, Tan Xuyan, Wei Shengming, Liang Fayun
Analysis Of Influence Of Internal Erosion On Deformation Of Subway Station Structure, Qin Tianxin, Wang Chen, Tan Xuyan, Wei Shengming, Liang Fayun
Journal of China & Foreign Highway
Under the long-term effects of disasters such as rainstorms and floods,the soil layer around subway stations may be affected by internal erosion,threatening the structural safety of urban subway stations.To explore the influence of internal erosion on subway station structures,this study conducted isotropic consolidation and triaxial compression tests on gap-graded sand soil.Eroded soil specimens were simulated by adjusting the fine particle content to explore the pattern of variations in physical and mechanical properties caused by internal erosion.Results indicate that internal erosion alters the stress-strain relationship of gap-graded sand soil,increasing compressibility,decreasing shear strength,and weakening dilatancy.Drucker-Prager (DP) cap model parameters for eroded sand …
Geographical Origin Discrimination Of Huangjincha Early Spring Green Tea By Mineral Element Fingerprinting, Zhong Ni, Zhao Xi, Yu Penghui, Huang Hao, Li Na, Zheng Hongfa
Geographical Origin Discrimination Of Huangjincha Early Spring Green Tea By Mineral Element Fingerprinting, Zhong Ni, Zhao Xi, Yu Penghui, Huang Hao, Li Na, Zheng Hongfa
Food and Machinery
[Objective] To realize the geographical discrimination of early spring green tea of Huangjincha from major production areas in Hunan based on mineral element fingerprinting. [Methods] A total of 138 early spring green tea samples of Huangjincha from different regions in Hunan were quantitatively analyzed for 48 mineral elements using inductively coupled plasma mass spectrometry (ICP-MS).Classification models for different production areas were developed by integrating principal component analysis (PCA ), orthogonal partial least squares -discriminant analysis (OPLS -DA), and Fisher's linear discriminant analysis. [Results] The PCA score plots and OPLS -DA models effectively distinguished Huangjincha samples from various production areas in …
Protective Effect Of A Compound Staple Food Against Oxidative Damage In Hepg 2 Cells, Nie Beibei, Luo Wu, Guo Shengxiang, Lin Shu, Liu Dongbo
Protective Effect Of A Compound Staple Food Against Oxidative Damage In Hepg 2 Cells, Nie Beibei, Luo Wu, Guo Shengxiang, Lin Shu, Liu Dongbo
Food and Machinery
[Objective] To explore the protective effect and mechanism of a compound staple food (CSF ) against H2O2-induced oxidative damage in human hepatocellular carcinoma cells (HepG 2). [Methods] The in vitro antioxidant capacity of CSF was evaluated using DPPH and ABTS radical scavenging assays. An oxidative stress model was established by inducing HepG 2 cells with H2O2, and the effect of CSF on cell viability was measured by the CCK-8 assay. The impact of CSF on cellular oxidative stress was assessed by measuring reactive oxygen species (ROS ), mitochondrial membrane potential (JC-1), malondialdehyde (MDA ), and superoxide dismutase (SOD ) levels. …
Optimization Of Extraction Method For Polygonatum Kingianum Polysaccharides Based On Comprehensive Functional Characteristics, Tang Yayuan, Wei Zhen, Yue Jian, Su Juan, Sun Jian, He Xuemei
Optimization Of Extraction Method For Polygonatum Kingianum Polysaccharides Based On Comprehensive Functional Characteristics, Tang Yayuan, Wei Zhen, Yue Jian, Su Juan, Sun Jian, He Xuemei
Food and Machinery
[Objective] This study investigates the effects of various extraction methods on the chemical composition and functional characteristics of polysaccharides derived from Polygonatum kingianum, specifically the white flower and purple-red flower varieties. [Methods] P. kingianum polysaccharides (PKPs ) are extracted with traditional hot water, alkaline, acidic, enzymatic, ultrasonic, and hot water-alkaline extraction methods, and a comparative evaluation is made on their extraction yield, chemical composition (including total sugar, sulfate, and uronic acid content ), and biological properties (including DPPH radical scavenging activity, α-glucosidase inhibitory activity, and tyrosinase inhibitory activity ). [Results] The extraction yield of PKPs and their chemical composition are …
Extraction Of Polysaccharide From Musella Lasiocarpa By Ultrasonic-Assisted Ionic Liquid Method And Study On The In Vitro Activity And Monosaccharide Composition Of The Polysaccharide, Duan Qiuhong, Jia Qingchao
Extraction Of Polysaccharide From Musella Lasiocarpa By Ultrasonic-Assisted Ionic Liquid Method And Study On The In Vitro Activity And Monosaccharide Composition Of The Polysaccharide, Duan Qiuhong, Jia Qingchao
Food and Machinery
[Objective] To study the extraction process and in vitro activity of polysaccharide from Musella lasiocarpa. [Methods] Ultrasonic-assisted ionic liquid extraction is adopted. With the extraction rate of polysaccharide as the evaluation index, single factor and response surface methods are used to optimize the extraction process of polysaccharide. Furthermore, the polysaccharide is characterized in terms of the antioxidant activity, monosaccharide composition, and inhibitory activities on pancreatic lipase and α-amylase. [Results] The 引用格式：段秋虹，贾庆超. 超声辅助离子液体法提取地涌金莲多糖及体外活性、单糖成分研究 [J]. 食品与机械，2025，41(8):188-196. Citation: DUAN Qiuhong, JIA Qingchao. Extraction of polysaccharide from Musella lasiocarpa by ultrasonic-assisted ionic liquid method and study on the in vitro activity and monosaccharide composition …
Metabolic Engineering Of Saccharomyces Cerevisiae For De Novo Biosynthesis Of Naringin From D-Xylose, Zhao Yifei, Li Gaoyang, Huang Luhong, Liu Juan, Xiao Zhiqiang
Metabolic Engineering Of Saccharomyces Cerevisiae For De Novo Biosynthesis Of Naringin From D-Xylose, Zhao Yifei, Li Gaoyang, Huang Luhong, Liu Juan, Xiao Zhiqiang
Food and Machinery
［Objective］ To explore the biosynthesis method of naringin,a bioactive compound in citrus.［Methods］ Engineered Saccharomyces cerevisiae strains for naringenin biosynthesis are constructed through enzyme screening,multi -copy integration,and precursor supply.Subsequently,de novo biosynthesis of naringin from D-xylose is achieved by introducing the naringin biosynthetic pathway and optimizing UDP -glucose supply.［Results］］ The optimal flavonoid synthase is identified as PhCHS by screening the key enzymes of the naringenin pathway.The naringenin biosynthesis pathway is further integrated at multi -copy sites.The constructed strain Z39M2 can synthesize 36.53 mg/L naringenin.The overexpression of CAT 2,xPK-PTA pathway,and ACC 1m optimizes malonyl -CoA supply and constructs strain Z 44,with a naringenin …
Effects Of Whole Quinoa Flour Addition On Biscuit Quality And Glycemic Index, Wang Ying, Zhang Xinyi, Yu Bo, Li Yunjie, Tang Shangwen, Wu Jinju
Effects Of Whole Quinoa Flour Addition On Biscuit Quality And Glycemic Index, Wang Ying, Zhang Xinyi, Yu Bo, Li Yunjie, Tang Shangwen, Wu Jinju
Food and Machinery
［Objective］ To explore the effects of whole quinoa flour addition on the quality and in vitro digestion characteristics of biscuits.［Methods］ Whole quinoa flour,at varying proportions (0%,10%,20%,30%,40%,and 50%),is added to wheat flour to investigate the effects of whole quinoa flour addition on the quality and in vitro digestion characteristics of biscuits.［Results］］ Compared with the control group without whole quinoa flour,the groups with whole quinoa flour addition show gradually increased moisture content of quinoa biscuits as well as their hardness gradually decreasing and toughness first increasing and then decreasing as the addition of whole quinoa flour increases.When the addition of whole quinoa …
Research Progress On Active Components In Fruits Of Panax Plants And Its Processing And Utilization, Kong Linghui, Chen Haining, Wang Yingxiu, Jiang Mengmeng, Li Xiangguo, Han Lianhua
Research Progress On Active Components In Fruits Of Panax Plants And Its Processing And Utilization, Kong Linghui, Chen Haining, Wang Yingxiu, Jiang Mengmeng, Li Xiangguo, Han Lianhua
Food and Machinery
The fruits of Panax species can serve as raw materials for functional foods and as resources for drug development.Their extracts have achieved preliminary translational applications in the fields of health food and medicine,demonstrating market potential.This article selects five Panax species commonly used in clinical practice,including P.ginseng C.A.Mey.,P.quinquefolium L.,P.notoginseng (Burk.) F.H.Chen,P.japonicus C.A.Mey.,and P.japonicus C.A.Mey.var.major (Burk.) C.Y.Wu et K.M.Feng,and systematically elaborates on the research progress regarding the bioactive components,medicinal value,and current status of development and utilization of their fruits.
Effect Of Mineral Admixtures On Properties Of Shotcrete, Ma Kaikai, Zhao Feng, Sun Rongxiao, Han Song, Hu Peng, Wang Kun
Effect Of Mineral Admixtures On Properties Of Shotcrete, Ma Kaikai, Zhao Feng, Sun Rongxiao, Han Song, Hu Peng, Wang Kun
Journal of China & Foreign Highway
To study the influence of different mineral admixtures on the properties of shotcrete,the effects of four kinds of mineral admixtures including fly ash,silica fume,metakaolin,and carbon black on the rebound rate,one-shot thickness,and compressive strength of shotcrete were analyzed through tests on concrete rebound rate,one-shot thickness,and compressive strength.The results show that:① as the content of carbon black,silica fume,and metakaolin increases from 5% to 10%,the rebound rate of shotcrete decreases by 25.76%,16.46%,and 16.70%,respectively;② carbon black and silica fume have a good effect on increasing the one-shot thickness of concrete.When the content of carbon black and silica fume is 10%,the one-shot thickness exceeds 35 …
Status Of Persistent Organic Pollutant Of Brominated Flame Retardant Hbcd In Daily Diet And Its Potential Health Risks, Zhao Zirui, Ji Hainan, Zhao Chan, Shen Guolin, Zhang Mengling
Status Of Persistent Organic Pollutant Of Brominated Flame Retardant Hbcd In Daily Diet And Its Potential Health Risks, Zhao Zirui, Ji Hainan, Zhao Chan, Shen Guolin, Zhang Mengling
Food and Machinery
Hexabromocyclododecane (HBCD ) is a brominated flame retardant widely used in flame retardant for various industrial and consumer products.Due to its high biotoxicity,bioaccumulation,pollution persistence,and long -range transport capacity,HBCD has been included in the Stockholm Convention list of persistent organic pollutants (POPs ) and is being phased out globally.In this paper,the contamination of HBCD,additive brominated flame retardants,in daily diet and the characteristics of HBCD absorption and metabolism in the body are briefly described.Then,the evaluation of HBCD exposure toxicity by bioinformatics,in vitro primary cell models,and cell line models are reviewed.Subsequently,the effects of HBCD intervention on the toxicology of zebrafish models,mouse models,and rat …
Influence Of Monascus On Polyphenol Content And Species In Fermented Apocynum Venetum L., Zhou Xinyi, Liu Xiaochun, Zhou Yingjun, Xie Chunliang, Chen Jinjun
Influence Of Monascus On Polyphenol Content And Species In Fermented Apocynum Venetum L., Zhou Xinyi, Liu Xiaochun, Zhou Yingjun, Xie Chunliang, Chen Jinjun
Food and Machinery
［Objective］ To explore the influence of Monascus fermentation on the release of polyphenols from Apocynum venetum L.leaves.［Methods］ Apocynum venetum L.was fermented with Monascus,and the content of polyphenols was measured,followed by transcriptome analysis.［Results］ Total polyphenols,soluble polyphenols,insoluble -bound polyphenols,as well as the content of chlorogenic acid,luteolin,vitexin,and quercetin were taken as evaluation indicators.The results indicated that fermentation on the 8th day significantly increased the release of polyphenols from Apocynum venetum L.leaves.Transcriptome analysis showed that the regulated expression of carbohydrate -active enzymes such as 1,3-β-GT and XTH 23,was the main factor contributing to the release of polyphenols from Apocynum venetum L.by Monascus.［Conclusion］ Monascus fermentation …
Extraction , Enzymatic Properties And Application Of Laccase From Pleurotus Citrinopileatus Residue, Zhang Yong, Li Qing, Zheng Zhihao, Liu Shimei, Yang Kai
Extraction , Enzymatic Properties And Application Of Laccase From Pleurotus Citrinopileatus Residue, Zhang Yong, Li Qing, Zheng Zhihao, Liu Shimei, Yang Kai
Food and Machinery
［［Objective ］］ Explore a low -cost laccase preparation method that can be used for juice clarification.［［Methods ］］ The extraction method,optimal reaction conditions and preparation conditions of enzyme powder were optimized,and the prepared laccase powder was applied to blueberry juice clarification.［［Results］］ The optimal extraction conditions for laccase were as follows:citric acid buffer with pH 4.8,solid -liquid ratio of 1∶5 (g/mL ),extraction temperature of 50 ℃,and extraction time of 4 h.The optimal conditions for laccase reaction were as follows:reaction temperature 30 ℃,pH 4.8,Cu2+ concentration 10 mmol/L,Mn2+ concentration 5 mmol/L.The optimal conditions for the preparation of enzyme powder were as follows:maltodextrin and skimmed …
Effects Of Different Transport Modes On The Quality Of Live Abalone, Yan Xin, Yao Yanyan, Zhang Xiaoyu, Sun Fei, Ni Tian
Effects Of Different Transport Modes On The Quality Of Live Abalone, Yan Xin, Yao Yanyan, Zhang Xiaoyu, Sun Fei, Ni Tian
Food and Machinery
［Objective］ Investigated the effects of different transport modes on the quality of live abalone.［Methods］ Constant temperature transportation with seawater and low temperature transportation without water were used to simulate transportation for 60 h respectively,and the quality index,metabolic enzyme activity and microstructure of live abalone were determined and evaluated.［Results］］ As time went on,water,crude protein,crude fat,glycogen,pH,and sensory evaluation decreased in both groups,while TVB-N increased.All indicators of abalone in seawater constant temperature group changed slowly,the survival rate of abalone was over 90% by simulated transport for 60 h.However,in no water low temperature group,the abalone began to die at 30 h,and the vitality,odor and …
Enzymatic Hydrolysates Of Mulberry Leaf Flavonoids Alleviate Depression Induced By Reserpine In Zebrafish, Zheng Xuan, Lu Yunke, Zhou Chunling, Zhang Ju, Wang Mingxue, Cui Shizhan, Jia Dongsheng
Enzymatic Hydrolysates Of Mulberry Leaf Flavonoids Alleviate Depression Induced By Reserpine In Zebrafish, Zheng Xuan, Lu Yunke, Zhou Chunling, Zhang Ju, Wang Mingxue, Cui Shizhan, Jia Dongsheng
Food and Machinery
［Objective］ This study aims to investigate the anti -depression effects of enzymatic hydrolysates of mulberry leaf flavonoids (EMLF ).［Methods］ EMLF was prepared and its components were analyzed by UPLC -MS.A zebrafish model of depression was induced by 40 mg/L reserpine.Six groups were designed,including the control,model,fluoxetine,L-EMLF (20 μg/mL ),M-EMLF (40 μg/mL ),and H-EMLF (80 μg/mL ) groups.Behavioral tests,including the new tank test and the light -dark box test,were conducted.The structural changes in the brain tissue of zebrafish in each group were observed by HE staining.The mRNA levels of interleukin -1β (IL-1β),tumor necrosis factor -α (TNF-α),tryptophan hydroxylase -2 (TPH- 2),and 5-hydroxytryptamine 2A …
Coordinated And Optimized Scheduling Of Virtual Power Plants With Wind Power‑Waste Incineration Cogeneration Considering Uncertainty Of Source And Load Sides, Chenyu Wang, Zhong Tang, Minjie Wei, Xiangyang Liu, Haoyang Cui
Coordinated And Optimized Scheduling Of Virtual Power Plants With Wind Power‑Waste Incineration Cogeneration Considering Uncertainty Of Source And Load Sides, Chenyu Wang, Zhong Tang, Minjie Wei, Xiangyang Liu, Haoyang Cui
Journal of Electric Power Science and Technology
In response to the uncertainty of wind power and load fluctuations, as well as the insufficient system peak shaving capacity of cogeneration units during winter heating periods, a virtual power plant consisting of wind farms, power-to-gas (P2G) conversion plants, and waste incineration power plants within a certain area is formed. Firstly, to address the low energy utilization efficiency of waste incineration power plants, it is considered to adopt their cogeneration mode to participate in system peak shaving, improve energy utilization efficiency, and establish a mathematical model of waste incineration power plants under the cogeneration mode. Secondly, wind farms, P2G, and …
Experimental Investigation On Shrinkage Effect Of Ultra‑High Performance Concrete Under Steam Curing, Li Bing, Yang Tengyu, Fang Changle, Luo Zirun, Li Chuanxi, Tan Ke
Experimental Investigation On Shrinkage Effect Of Ultra‑High Performance Concrete Under Steam Curing, Li Bing, Yang Tengyu, Fang Changle, Luo Zirun, Li Chuanxi, Tan Ke
Journal of China & Foreign Highway
Determining the free shrinkage of U HPC is an important basis for analyzing the shrinkage effect of steel UHPC composite bridge deck.Therefore，based on the UHPC materials to be used in a project，three batches of UHPC free shrinkage specimens were made，and three specimens were made in each batch.By testing the strain and temperature of specimens during curing，the free shrinkage strain-age curve and temperature-age curve of UHPC were obtained.The development and variation law of UHPC shrinkage strain are discussed.Based on the experimental results，the equivalent time is introduced on the basis of Arrhenius empirical formula，and a modified model of free shrinkage is proposed.Finally，based …
Research On Performance Of Coal Gangue Concrete, Wang Jiliang, Ma Wenhui, Xu Weidong, Lyu Zhigang
Research On Performance Of Coal Gangue Concrete, Wang Jiliang, Ma Wenhui, Xu Weidong, Lyu Zhigang
Journal of China & Foreign Highway
Coal gangue is an industrial solid waste produced in the process of raw coal mining.It has a large stock and a relatively low utilization rate.Using coal gangue as concrete aggregate can not only solve the environmental pollution caused by coal gangue storage but also make up for the shortage of natural sand and gravel resources，which opens up an effective way for the large-scale utilization of coal gangue.According to the application characteristics of coal gangue as concrete aggregate，the chemical component，mineral composition，and physical properties of coal gangue were systematically analyzed.The influence of coal gangue as aggregate on the working performance，mechanical properties，volume stability，and …
Pollution Characteristics Of Heavy Metals In Solid Waste Subgrade Filling Materials, Du Qianhui, Fu Wei, Zhang Junhui, Tang Qiang, Gu Fan
Pollution Characteristics Of Heavy Metals In Solid Waste Subgrade Filling Materials, Du Qianhui, Fu Wei, Zhang Junhui, Tang Qiang, Gu Fan
Journal of China & Foreign Highway
Using solid waste in the road engineering field for subgrade filling is an important approach for building green and low-carbon emission roads.However,most solid waste contains heavy metal pollutants to varying degrees,and heavy metals will be released under complex environments including rainfall infiltration and groundwater immersion,thereby causing pollution to the surrounding soil and groundwater if not handled properly.This paper reviewed the current status of research on four aspects,including the comprehensive use of solid waste materials in subgrade engineering,the leaching and migration behaviors of heavy metals in solid waste,and the prevention and control treatment of heavy metals in solid waste.It is found …
Mechanical Performance Of Uhpc Building Envelope Based On Topological Optimization And Modular Composition, Zhou Zhixuan, Jiang Youbao, Liu Jun, Xiang Yi, Zhou Hao
Mechanical Performance Of Uhpc Building Envelope Based On Topological Optimization And Modular Composition, Zhou Zhixuan, Jiang Youbao, Liu Jun, Xiang Yi, Zhou Hao
Journal of China & Foreign Highway
To ensure a safe，aesthetic，and lightweight building envelope，an ultra-high performance concrete （UHPC） building envelope and its node connection mode were proposed based on topological optimization and modular composition.Firstly，the UHPC building envelope was optimized by using the method of minimizing structural compliance subjected to given material volume constraints，and the mechanical performance before and after optimization was compared.The modular design was adopted，and the optimization result of the most unfavorable stress area in the model was taken as the basic configuration unit.Then，UHPC tenon and mortise nodes were proposed，which could be simply assembled into modules.By considering the weak mechanical performance of nodes，the finite element analysis …
Detection And Enrichment Characteristics Analysis Of Common Heavy Metal Content In Different Organs Of Hunan Lotus Seed, Dai Hui, Zhao Wenyu, Wang Jianhui, He Xiangyi, Long Xiao
Detection And Enrichment Characteristics Analysis Of Common Heavy Metal Content In Different Organs Of Hunan Lotus Seed, Dai Hui, Zhao Wenyu, Wang Jianhui, He Xiangyi, Long Xiao
Food and Machinery
Objective: The objective of this study is to investigate the heavy metal content in sediment and various organs of Hunan lotus seed in a planting area, as well as to explore the characteristics of heavy metal accumulation and transfer in Hunan lotus seed. Methods: A typical planting area in Hunan Province was selected for this research. The contents of Cd, Cr, Pb, Ni, Cu, Zn and Mn were measured using an inductively coupled plasma emission spectrometer. The bioconcentration factor （BCF） and transfer factor （TF） were used to evaluate the heavy metal accumulation and transfer ability of Hunan lotus seed. Results: …
Shear Strength Test Of Hefei Expansive Soil Under Low Stress Conditions With Controlled Suction, Hou Chaoqun, Zhang Rongjian, Li Yongxin
Shear Strength Test Of Hefei Expansive Soil Under Low Stress Conditions With Controlled Suction, Hou Chaoqun, Zhang Rongjian, Li Yongxin
Journal of China & Foreign Highway
Topsoil slide and instability of expansive soil slopes may occur under variable saturation conditions.In order to study the strength characteristics of unsaturated expansive soil under low stress conditions，several different matrix suction and stress conditions were set by unsaturated triaxial apparatus.The triaxial shear test of Hefei expansive soil was carried out，and the test data were analyzed.The test results show that when the net confining stress on the expansive soil continues to weaken，the stress-strain curve transitions from strain hardening to strain softening.The strength of unsaturated expansive soil increases with increasing matrix suction.The shear strength of shallow expansive soil shows a significant reduction …
Research Progress Of Visual Information Communication In Food Packaging: A Systematic Review, Tang Cong, Liu Zongming
Research Progress Of Visual Information Communication In Food Packaging: A Systematic Review, Tang Cong, Liu Zongming
Food and Machinery
To further develop scientific food packaging design methods, providing consumers with more accurate and prompt food packaging information, the article comprehensively analyzed three types of key cues for food packaging information communication: textual information, food imagery and cross-modal correspondence by integrating domestic and international related literature, and pointed out that textual information was more advantageous in the process of conveying information, positive slogans are more influential, and other detailed information would reduce consumer cognitive bias. Text is more suitable for expressing food functions, while pictures are more suitable for expressing sensory appeals. Secondly, package imagery had a significant impact on …