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Agricultural Sciences in China 2003年第4期2卷 394-399页

作者： WANGJun-mei ZHANGGuo-ping chenjin-xin SHENQiu-quan AgronomyDepartment ZhejiangUniversithHangzhou310029P.R.China InstituteforApplicationofAtomicEnergy ZhejiangAcademyofAgriculturalSciencesHangzhou310021P.R.China

Eight two-rowed barley cultivars were grown at seven locations in the southern winter-barley zone of China. Mean grainβ-glucanase activity ranged from 39.89 U kg-1 for Suyin2 to 49.75 U kg-1 for Xi-umai3 in 8 cultivars grown at 7 locations, and from 38. 74 U kg-1 in Zhengzhou to 57. 96 U kg-1 in Putian among 7 locations on an average of all cultivars. Correspondingly, mean malt β-glucanase activity of 8 cultivars ranged from 313.33 U kg-1 for ZAU3 to 489. 89 U kg-1 for Daner Barley, and of 7 locations from 330.40 U kg-1 in Yancheng to 418. 24 U kg-1 in Putian. There were significant differences among cultivars and locations in maltβ-glucanase activities. The locations showed much larger variation in maltβ-glucanase activities than cultivars. The reduction of total β-glucan content after malting varied in both cultivars and locations, with a mean of 78.31%. The analysis of correlations showed that maltβ-glucan content was significantly positively and negatively correlated with grain β-glucan content and malt β-glucanase activity, respectively, and malt β-glucanase activity was significantly positively correlated with grain β-glucanase activity.

关键词： Barley (Hordeum vulgare L.) β-glucan β-glucanase Cultivar Environment

Effects of Waterlogging on Photosynthesis and Antioxidant Enzyme Activities of Six Barley Genotypes with Different Waterlogging Tolerance

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Agricultural Sciences in China 2005年第4期4卷 310-316页

作者： XIAOYu-ping WEIKang chenjin-xin ZHOUMei-xue ZHANGGuo-ping AgronomyDepartment ZhejiangUniversityHangzhou310029P.R.China UniversityofTasmanian TasmanianInstituteofAgriculturalResearchKindsMeadowsTasmanian7249Australia

A field experiment was carried out to study genotypic difference in the effect of waterlogging on photosynthesis, chlorophyll content and antioxidative enzyme activities in barley. Waterlogging caused a rapid decline in net photosynthetic rate (Pn) and stomatal conductance (gs), and little change in chlorophyll content during early days of the treatment. A dramatic increase in malondialdehyde (MDA) content, superoxide dismutase (SOD) and peroxidase (POD) in waterlogged plants in the early days of the experiment was found, indicating the occurrence of oxidative stress in barley plants exposed to waterlogging. There was a highly significant difference in the changed extent of all these parameters among genotypes. Franklin and Yongjiahong Liuleng Damai, which were relatively sensitive to waterlogging in terms of growth, photosynthesis and chlorophyll content, accumulated much more MDA than the other two relatively tolerant genotypes (93-3143 and QS). After removal of waterlogging, the genotypic difference became much greater in recovering of these examined parameters. Yongjiahong Liuleng Damai showed higher recovery, while Franklin only recovered to 50% of the control at the 14 day after waterlogging removal. It may be concluded that it is the difference in anti-oxidative stress caused by waterlogging that account for the major difference in photosynthesis among barley genotypes.

关键词： Barley (Hordeum vulgare L.) Waterlogging Photosynthesis Oxidative stress

Variation of Grain and Malt Qualities in Barley as Affected by Cultivars and Environments

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Agricultural Sciences in China 2003年第6期2卷 699-705页

作者： WANGJun-mei ZHANGGuo-ping chenjin-xin DINGShou-ren ZHOUTi-yao InstituteofCropandNuclearTechniqueApplication ZhejiangAcademyofAgriculturalSciencesHangzhou310021P.R.China AgronomyDepartment ZhejiangUniversityHangzhou310029P.R.China TheNationalCenterforTestingMalt Lianyungang222023P.R.China

Inferior and unstable quality of malt barley in China has limited its wide use in malting and brewing industries. In this research, eight two-rowed barley cultivars were planted at 7 locations with different ecological conditions in southern China, to investigate the cultivar and environmental effect on grain and malt qualities. The results showed that grain protein content differed dramatically among locations, but there were no significant differences among cultivars. For four malt qualities including diastatic power, wort viscosity, Kolbach index and malt extract, significant differences were found among cultivars and locations, except for diastatic power among cultivars. Coefficients of variance(CV)caused by location were greater than those caused by cultivar for each quality parameter, especially for diastatic power and Kolbach index, indicating the predominant influence of environment on malt quality. The analysis showed that grain protein content was positively related to diastatic power and wort viscosity, and negatively to malt extract. Kolbach index was positively related to malt extract, and negatively to diastatic power and wort viscosity. Diastatic power showed positive and negative correlation with wort viscosity and malt extract, respectively.

关键词： Barley(Hordeum vulgare L.) Malt quality Cultivar Environment

Genotypic Difference in Plant Growth and Mineral Composition in Barley Under Aluminum Stress

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Agricultural Sciences in China 2003年第5期2卷 494-501页

作者： GUOTian-rong ZHANGGuo-ping WUFei-bo chenjin-xin ZHOUMei-xue AgronomyDepartment ZhejiangUniversityHangzhou310029P.R.China TasmanianInstituteofAgriculturalResearch UniversityofTasmanianKindsMeadowsTasmanian7249Australia

Four barley genotypes (Tiantaiyangdamai, Xiyin2, Mimaill4 and Tai94-Ce6) were exposed to 0, 50, 100, and 150μM of Al-containing solution with pH 4.5, to determine the differences in growth inhibition , Al concentration and accumulation and mineral composition among genotypes. The results showed that Mimaill4 and Tai94-Ce6 had significantly higher Al concentration and accumulation than Tiantaiyangdami and Xiyin2, especially in roots, and the growth traits including root and shoot dry weights, shoot height, root length and tillers per plant were more inhibited in the former two genotypes. Al treatments caused a significant reduction of N, P, K, Ca, Mg and Mn content in both roots and shoots, of Cu in shoots; and a significant increase in Fe and Zn content in both roots and shoots, of Cu in roots. The changed rates of mineral content caused by Al treatments, in terms of the content in 150μM Al divided by the content in the control, differed significantly among four genotypes. Two Al-sensitive genotypes, Mimaill4 and Tai94-Ce6 had much greater changes in mineral content than other two Al-tolerant genotypes Tiantaiyangdamai and Xiyin2 when subjected to Al stress in comparison with the control. It is indicated that the Al-tolerant genotype is characterized by less uptake and accumulation of Al in roots and smaller disorders in mineral metabolism and ion homeostasis.

关键词： Aluminum toxicity Barley (Hordeum vulgare L. ) Genotype Growth Mineral nutrient

Performance analysis of ghost imaging lidar in background light environment

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Photonics Research 2017年第5期5卷 431-435页

作者： chenjin DENG LONG PAN CHENGLONG WANG xin GAO WENLIN GONG SHENSHENG HAN Key Laboratory for Quantum Optics and Center for Cold Atom Physics of CAS Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences University of Chinese Academy of Sciences

The effect of background light on the imaging quality of three typical ghost imaging(GI) lidar systems(namely narrow pulsed GI lidar, heterodyne GI lidar, and pulse-compression GI lidar via coherent detection) is investigated. By computing the signal-to-noise ratio(SNR) of fluctuation-correlation GI, our analytical results, which are backed up by numerical simulations, demonstrate that pulse-compression GI lidar via coherent detection has the strongest capacity against background light, whereas the reconstruction quality of narrow pulsed GI lidar is the most vulnerable to background light. The relationship between the peak SNR of the reconstruction image andσ(namely, the signal power to background power ratio) for the three GI lidar systems is also presented, and theresults accord with the curve of SNR-σ.

关键词： GI SNR Performance analysis of ghost imaging lidar in background light environment

Characteristics of novel Ti-10Mo-xCu alloy by powder metallurgy for potential biomedical implant applications

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Bioactive Materials 2020年第3期5卷 659-666页

作者： Wei Xu chenjin Hou Yuxuan Mao Lei Yang Maryam Tamaddon Jianliang Zhang Xuanhui Qu Chaozong Liu Bo Su xin Lu Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsInstitute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijingChina Institute of Orthopaedic&Musculoskeletal Science University College LondonRoyal National Orthopaedic HospitalStanmoreHA74LPUK Center for Health Science and Engineering Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control TechnologySchool of Materials Science and EngineeringHebei University of TechnologyTianjin300130China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Bristol Dental School University of BristolBristolBS12LYUK

When biomaterials are implanted in the human body,the surfaces of the implants become favorable sites for microbial adhesion and biofilm formation,causing peri-implant infection which frequently results in the failure of prosthetics and revision ***-Mo alloy is one of the commonly used implant materials for load-bearing bone replacement,and the prevention of infection of Ti-Mo implants is therefore *** this study,bacterial inhibitory copper(Cu)was added to Ti-Mo matrix to develop a novel Ti-Mo-Cu alloy with bacterial inhibitory *** effects of Cu content on microstructure,tensile properties,cytocompatibility,and bacterial inhibitory ability of Ti-Mo-Cu alloy were systematically *** revealed that Ti-10Mo-1Cu alloy consisted ofαandβphases,while there were a few Ti2Cu intermetallic compounds existed for Ti-10Mo-3Cu and Ti-10Mo-5Cu alloys,in addition toαandβ*** tensile strength of Ti-10Mo-xCu alloy increased with Cu content while elongation ***-10Mo-3Cu alloy exhibited an optimal tensile strength of 1098.1 MPa and elongation of 5.2%.Cytocompatibility study indicated that none of the Ti-10Mo-xCu alloys had a negative effect on MC3T3-E1 cell *** inhibitory rates against *** and *** increased with the increase in Cu content of Ti-10Mo-xCu alloy,within the ranges of 20-60%and 15-50%,*** together,this study suggests that Ti-10Mo-3Cu alloy with high strength,acceptable elongation,excellent cytocompatibility,and the bacterial inhibitory property is a promising candidate for biomedical implant applications.

关键词： Ti-10Mo-xCu alloy Microstructure Mechanical properties Cytocompatibility Bacterial inhibitory property

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一种单相非隔离集成升压光伏逆变器

中国电机工程学报 2023年第16期43卷 6429-6440页

作者：胡雪峰汪慧茹徐晗费晨进余振海林鑫王琳安徽工业大学电气与信息工程学院安徽省马鞍山市243032 河海大学能源与电气学院江苏省南京市211100

在光伏发电系统中,由于传统单级式逆变器的交流输出电压低于直流侧电源电压,因此输入侧通常需要多组光伏电池板串联,以提升直流输入电压来满足交流侧输出标准电压的需求。但是,多组光伏电池板进行串联后容易受到阴影遮挡等现象引起光伏... 详细信息

在光伏发电系统中,由于传统单级式逆变器的交流输出电压低于直流侧电源电压,因此输入侧通常需要多组光伏电池板串联,以提升直流输入电压来满足交流侧输出标准电压的需求。但是,多组光伏电池板进行串联后容易受到阴影遮挡等现象引起光伏发电效率降低等问题,此外,传统全桥逆变器容易产生漏电流,降低系统的安全性能。为此,该文提出一种集成单相单级式升压光伏逆变器拓扑结构,该结构的交流输出电压可以高于直流输入电压,同时具有抑制漏电流的能力,并且避免了桥臂的直通问题,有利于提高系统的可靠性。分析逆变器的工作原理,调制策略以及稳态特性,并对其主要参数进行理论计算和设计。

关键词：光伏逆变器高增益漏电流