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Determination of volatile profiles inside apple fruit storage facilities using Monotrap^(TM)monolithic silica adsorbent and GC-MS

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Horticultural Plant Journal 2021年第4期7卷 267-274页

作者： Cuihua Liu Xiaoran Liu Xiaoning Tian Jing zhang zhanfeng zhang Jinrui Shi Juan Xu Xiaolin Ren College of Horticulture Northwest A&F UniversityYanglingShaanxi 712100China College of Plant Protection Northwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Horticultural Plant Biology(Ministry of Education) College of Horticulture and ForestryHuazhong Agricultural UniversityWuhan 430070China

The interior atmosphere of storage facilities is very important for maintaining fruit quality and delaying senescence,so it’s of significance to determine the volatile profiles in this environment for the postharvest ***,volatile profiles inside fruit storage facilities have been rarely *** study the volatile profiles of the atmosphere inside fruit storage facilities,a method comprising Monotrap^(TM)adsorbent and GC–MS analysis in the study was developed and *** on that,the volatile profiles in the atmosphere inside fruit storage facilities at four locations in Shaanxi Province were *** thirty-six volatiles were detected,and most of them were identified as *** analysis of the similarities of volatile profiles showed that the three storage rooms at each location clustered *** storage rooms at two locations in Baoji had the most similar volatile profiles,and both were similar to that at Xianyang,but different from that at Yan’an,which were consistent with their geographic *** the basis of a principal component analysis,heatmap dendrogram,and correlation matrix analysis,these compounds clustered into five *** in Group 1,which were abundant in the storage room at Yan’an,were branched-chain esters,whereas the compounds in the other four groups were mainly straight-chain esters which were abundant in the storage rooms at Xianyang and *** difference among volatile profiles inside fruit storage facilities at four locations might be caused by ultraviolet *** this study,we demonstrated the Monotrap^(TM)adsorbent and GC–MS analysis were an efficient method for volatile compounds detection inside fruit storage facilities.

关键词： Apple MonoTrap^(TM)adsorbent Volatile Storage environment Ester

Acetyl coenzyme A carboxylase modulates lipogenesis and sugar homeostasis in Blattella germanica

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Insect Science 2024年第2期31卷 387-404页

作者： Xiaojin Pei Tiantian Bai Yuan Luo zhanfeng zhang Sheng Li Yongliang Fan Tong-Xian Liu Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology and Institute of Insect Science and Technology School of Life SciencesSouth China Normal UniversityGuangzhouChina State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau Ministry of AgricultureNorthwest A&F UniversityYanglingShaanxiChina Guangmeiyuan R&D Center Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied TechnologySouth China Normal UniversityMeizhouGuangdong ProvinceChina Institute of Entomology Guizhou UniversityGuiyangChina

Lipid and sugar homeostasis is critical for insect development and *** this study,we characterized an acetyl coenzyme A carboxylase gene in Blattella germanica(BgACC)that is involved in both lipogenesis and sugar *** found that BgACC was dominantly expressed in the fat body and integument,and was significantly upregulated after *** of BgACC in 5th-instar nymphs did not affect their normal molting to the next nymphal stage,but it caused a lethal phenotype during adult ***-RNA interference(RNAi)significantly downregulated total free fatty acid(FFA)and triacylglycerol(TAG)levels,and also caused a significant decrease of cuticular hydrocarbons(CHCs).Repression of BgACC in adult females affected the development of oocytes and resulted in sterile females,but BgACC-RNAi did not affect the reproductive ability of ***,knockdown of BgACC also changed the expression of insulin-like peptide genes(BglLPs),which mimicked a physiological state of high sugar *** addition,BgACC was upregulated when *** were fed on a high sucrose diet,and repression of BgACC upregulated the expression of the glycogen synthase gene(BgGlyS).Moreover,BgACC-RNAi increased the circulating sugar levels and glycogen storage,and a longevity assay suggested that BgACC was important for the survival of *** under conditions of high sucrose *** results confirm that BgACC is involved in multiple lipid biogenesis and sugar homeostasis processes,which further modulates insect reproduction and sugar *** study benefits our understanding of the crosstalk between lipid and sugar metabolism.

关键词： acetyl-CoA carboxylase German cockroach lipid biosynthesis sugar tolerance

A Dynamic Memory Allocation Optimization Mechanism Based on Spark

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Computers, Materials & Continua 2019年第8期61卷 739-757页

作者： Suzhen Wang Shanshan Geng zhanfeng zhang Anshan Ye Keming Chen Zhaosheng Xu Huimin Luo Gangshan Wu Lina Xu Ning Cao College of Information Technology Hebei University of Economics and BusinessShijiazhuang050061China College of Mathematics and Computer Science Xinyu UniversityXinyu338004China School of Information Engineering Jiangsu Polytechnic College of Agriculture and ForestryJurong212400China School of Computer Science University College DublinDublin 4Ireland College of Information Engineering Sanming UniversitySanming365004China

Spark is a distributed data processing framework based on *** allocation is a focus question of Spark research.A good memory allocation scheme can effectively improve the efficiency of task execution and memory resource utilization of the *** at the memory allocation problem in the Spark2.x version,this paper optimizes the memory allocation strategy by analyzing the Spark memory model,the existing cache replacement algorithms and the memory allocation methods,which is on the basis of minimizing the storage area and allocating the execution area according to the *** mainly including two parts:cache replacement optimization and memory allocation ***,in the storage area,the cache replacement algorithm is optimized according to the characteristics of RDD Partition,which is combined with PCA *** this section,the four features of RDD Partition are *** the RDD cache is replaced,only two most important features are selected by PCA dimension reduction method each time,thereby ensuring the generalization of the cache replacement ***,the memory allocation strategy of the execution area is optimized according to the memory requirement of Task and the memory space of storage *** this paper,a series of experiments in Spark on Yarn mode are carried out to verify the effectiveness of the optimization algorithm and improve the cluster performance.

关键词： Memory calculation memory allocation optimization cache replacement optimization

Study on Matching Performance of the Load-sensing Valve System with Independent Suspension Vehicles

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Study on Matching Performance of the Load-sensing Valve Syst...

2014中国汽车工程学会年会

作者： Si Xiaoyun Ma Wenlun Chen Yuchao Zheng Hongyu He Ying zhang zhanfeng China FAW Co. Ltd.R&D Center College of Automotive Engineering Ji Lin University

ISBN: (纸本)9783662450420

The load-sensing valve system can improve braking performance and stability of *** studies the load-sensing valve system matching performance of the independent suspension,and establishes the kinematic model and mathematical *** calculating and analyzing the model,give us a new method to match the load-sensing valve system for independent suspension vehicles that help us solves the mismatch problem of the load-sensing valve system with the independent suspension *** new matching method can improve brake performance which has been proved by new vehicles.

关键词： Load-sensing valve Independent suspension Matching performance Brake performance

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农地流转制度的现实困惑与改革路径

西北农林科技大学学报（社会科学版） 2017年第1期17卷 23-29,38页

作者：张占锋对外经济贸易大学法学院北京100029 唐山学院文法系河北唐山063000

农地流转实践在促进我国农地规模经营同时,也使现有农地法律制度的规范能力捉襟见肘。无论转包、抵押、转让,还是入股和出租均不能解决土地流转实践中农户利益和农业企业利益的冲突与对立,均无法调和土地承包经营权社会保障属性与财产... 详细信息

农地流转实践在促进我国农地规模经营同时,也使现有农地法律制度的规范能力捉襟见肘。无论转包、抵押、转让,还是入股和出租均不能解决土地流转实践中农户利益和农业企业利益的冲突与对立,均无法调和土地承包经营权社会保障属性与财产属性的矛盾,迫切需要新的法权形式出现。三权分置下的土地经营权是破解农地流转难题的正解。三权分置视阈下,转让客体为土地承包经营权,转让仍有存续必要,且转让条件应保持严苛。应区分转包与出租,转包的客体应为物权性的土地经营权,而出租的客体为土地承包经营权的租赁权,放宽接包方资格条件,使其涵盖所有市场主体。抵押应分为土地承包经营权抵押与土地经营权抵押两种类型,前者应满足转让所规定的条件要求。政府应支持农户之间的土地抵押实践,以消解对金融机构的路径依赖。入股应衡平土地承包经营权的社保属性与《公司法》的股东出资要求,出资形式应仅为土地经营权。

关键词：土地承包经营权土地经营权转让抵押入股转包出租

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库区淹没企业价值的评估

中国资产评估 2005年第3期 41-44页

作者：张战烽四川标准资产评估有限责任公司

库区淹没企业价值的评估实务要受、、等相关法规和标准的约束.根据这些规章,对于迁移或复建企业(简称迁建性补偿企业),依照"原规模、原标准、恢复原功能"的原则,适宜采用重置成本法评估其实物资产的价值,然后进行补偿;而对于不需要复建... 详细信息

库区淹没企业价值的评估实务要受、、等相关法规和标准的约束.根据这些规章,对于迁移或复建企业(简称迁建性补偿企业),依照"原规模、原标准、恢复原功能"的原则,适宜采用重置成本法评估其实物资产的价值,然后进行补偿;而对于不需要复建或难以复建的企业(简称一次性补偿企业),"应根据淹没影响的具体情况,给予合理的补偿",两类企业采用的是两种价值补偿原则.这样,评估涉及的范围、其价值内涵与方法都会有很大的差别.

关键词：企业价值库区淹没评估水利水电工程建设移民安置征地补偿设计规范淹没处理相关法规计算标准概算编制工程设计大中型性补偿实务办法规模

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资产评估行业的规则与行为探讨

中国资产评估 2003年第1期 13-15页

作者：张战烽

本文对资产评估质量的现状进行了分析,从规则角度探讨了存在质量问题的原因和解决质量控制的要点,提出应建立质询机制和给予评估机构有条件改正评估结论机会的机制。

关键词：资产评估行业规则行为评估质量质量控制质询机制评估结论机制

Mechanism Research and Quantitative Analysis of Braking Deviation on Automobile

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Mechanism Research and Quantitative Analysis of Braking Devi...

Study of Wire Rod On-line Measuring Technology

2014中国汽车工程学会年会

作者： Si Xiaoyun Song Weixing Ma Wenlun He Ying zhang zhanfeng Liu Xue

Braking deviation is a common dangerous working condition during vehicle is braking,which must be avoided in the process of braking system *** main reason is the unequal braking force between the left and right *** mechanism is analyzed based on many theoretical researches and practical experiences,by using specific data to calculate the difference of braking force that results in the braking *** road braking test also proves the test conclusion is the same as the calculated *** shows that the mechanism research and quantitative analysis can give good reference to the follow- up design.

关键词： braking deviation mechanism quantitative analysis braking force

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Study of Wire Rod On-line Measuring Technology