检索结果-南通市图书馆

China Foundry 2016年第5期13卷 322-326页

作者： Wei Long lu Xia xiao-lu wang School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068 China Hubei Provincial Key Laboratory of Green Materials for Light Industry Wuhan 430068 China

Fast and accurate determination of effective bentonite content in used clay bonded sand is very important for selecting the correct mixing ratio and mixing process to obtain high-performance molding sand. Currently, the effective bentonite content is determined by testing the ethylene blue absorbed in used clay bonded sand, which is usually a manual operation with some disadvantages including complicated process, long testing time and low accuracy. A rapid automatic analyzer of the effective bentonite content in used clay bonded sand was developed based on image recognition technology. The instrument consists of auto stirring, auto liquid removal, auto titration, step-rotation and image acquisition components, and processor. The principle of the image recognition method is first to decompose the color images into three-channel gray images based on the photosensitive degree difference of the light blue and dark blue in the three channels of red, green and blue, then to make the gray values subtraction calculation and gray level transformation of the gray images, and finally, to extract the outer circle light blue halo and the inner circle blue spot and calculate their area ratio. The titration process can be judged to reach the end-point while the area ratio is higher than the setting value.

关键词： used clay bonded sand bentonite ethylene blue absorbed image recognition automatic analyzer

Two-in-one tecton strategy to construct single crystalline hydrogen-bonded organic framework with high proton conductivity above 100℃

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Science China Chemistry 2023年第9期66卷 2563-2568页

作者： xiao-lu wang Linfeng Liang Shuai Dou Xian-Ming Zhang Institute of Crystalline Materials Shanxi UniversityTaiyuan 030006China Institute of Urban Environment Chinese Academy of SciencesXiamen 361021China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China

By tactically integrating two different kinds of proton donors and acceptors into one supramolecular tecton, a new crystalline hydrogen-bonded organic framework(HOF-SXU-1) has been developed. HOF-SXU-1 features a remarkable proton conductivity as high as 6.32 mS cm^(-1) and an extremely low activation energy of 0.16 eV at 160℃ under anhydrous N_(2) *** contrast, under identical conditions, the organic precursors of HOF-SXU-1 only exhibit negligible proton conduction performance, demonstrating that the formation of HOF is crucial for excellent proton conduction performance.

关键词： two-in-one strategy hydrogen-bonded organic framework proton conduction solid state electrolyte

Effect of Waterlogged and Aerobic Incubation on Enzyme Activities in Paddy Soil

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Pedosphere 2006年第4期16卷 532-539页

作者： wang xiao-Chang lu Qin Department of Tea Science College of Agriculture and Biotechnology Zhejiang University Hangzhou 31002g （China） Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）

An incubation experiment with soil water content treatments of 0.15 （W1）, 0.20 （W2）, and 0.40 （W3） g g^-1 soil was carried out for two months to investigate the activities of important enzymes involved in C, N, P, and S cycling in a paddy soil from the Taihu Lake region, China, under waterlogged and aerobic conditions. Compared with air-dried soil, waterlogging resulted in a significant decrease （P ≤ 0.05） of fluorescein diacetate （FDA） and /3-D-glucosidase activities, and this effect was enhanced with increasing waterlogging time. Waterlogging also significantly inhibited （P ≤ 0.05） arylsulfatase as well as alkaline and acid phosphatase activities, but did not decrease the activities with the increase in waterlogging time. Short-term waterlogging did not affect urease activity, but prolonged waterlogging decreased it markedly. In contrast, the aerobic incubation （W1 and W2 treatments） significantly increased （P ≤ 0.05） FDA, alkaline phosphatase, and /3-D-glucosidase activities. With aerobic treatments the activities of FDA and alkaline phosphatase increased with incubation time, whereas /3-D-glucosidase activity decreased. A significant difference （P ≤ 0.05） was usually observed between the W1 and W2 treatments for the activities of FDA as well as alkaline and acid phosphatase; however,/3-D-glucosidase and urease were usually not significant （P ≤ 0.05）. No activity differences were observed between waterlogging and aerobic incubation for arylsulfatase and urease.

关键词： aerobic incubation enzyme activity paddy soil waterlogging

Beta-Glucosidase Activity in Paddy Soils of the Taihu Lake Region, China

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Pedosphere 2006年第1期16卷 118-124页

作者： wang xiao-Chang lu Qin Department of Tea Science Zhejiang University Hangzhou 310029 （China）. Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）

The profile distribution of β-gulcosidase activity in twelve typical paddy soil profiles with high productivity in the Taihu Lake region of China were investigated. Activities of β-gulcosidase in the plow layers were in the range of 52.68- 137.02μg PNP g^-1 soil h^-1 with a mean of 89.22μg PNP g^-1 soil h^-1. However, most plow layers ranged from 70 to 110 μg PNP g^-1 soil h^-1. The profile distribution of β-gulcosidase activity in the 12 soil profiles decreased rapidly with soil depth, with activity at the 60 cm depth only about 10% of that in the surface layers （0-15 cm or 0-20 cm）. In these soil profiles, β-gulcosidase activity was significantly positively correlated with soll organic carbon and arylsulphatase activity. Meanwhile, a significantly negative correlation was shown between β-gulcosidase activity and soil pH.

关键词： beta-gulcosidase activity profile distribution paddy soil Taihu Lake region

Microstructure and mechanical properties of Al-10Si alloy modified with Al-5Ti

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China Foundry 2018年第6期15卷 405-410页

作者： Ya-ling Liu Chang-jun Wu Hao Tu xiao-wang lu Jian-hua wang Xu-ping Su Jiangsu Key Laboratory of Material Surface Science and Technology School of Materials Science and Engineering Changzhou University National Experimental Teaching Demonstration Center of Materials Science and Engineering Changzhou University Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou University

The microstructure, fracture morphology and mechanical properties of Al-10 Si alloy modified with Al-5 Ti were analyzed and tested by optical microscopy, scanning electron microscopy, and universal electronic testing machine. Compared with unmodified Al-10 Si alloy, the area fraction of α-Al phase in Al-10 Si alloy modified at 740 °C increased first and then decreased with the increase of added amounts of Al-5 Ti, and reached the maximum when the added amount of Al-5 Ti was 0.5 wt.%. When the modification temperature increased from 700 to 740 °C with Al-5 Ti being fixed at 0.5 wt.%, α-Al dendrites were refined obviously and the area fraction remarkably increased. Compared with unmodified Al-10 Si alloy, the ultimate tensile strength and elongation of the alloy modified at 740 °C with 0.5 wt.% Al-5 Ti increased by 9% and 49%, respectively. The fracture surface of modified alloy predominantly exhibited ductile fracture.

关键词： Al-10Si modification microstructure mechanical properties

Assessment of optic nerve and optic tract alterations in patients with orbital space-occupying lesions using probabilistic diffusion tractography

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International Journal of Ophthalmology(English edition) 2019年第8期12卷 1304-1310页

作者： Chun-Nan Wu Shao-Feng Duan Xue-Tao Mu Yi wang Peng-Yu Lan xiao-lu wang Kun-Cheng Li Department of Radiology Xuanwu HospitalCapitalMedical UniversityBeijing100053China Department of Radiology the Third Medical Center ofChinese PLA General HospitalBeijing100039China Division of Nuclear Technology and Applications Institute ofHigh Energy PhysicsChinese Academy of SciencesBeijing100049China Beijing Engineering Research Center of RadiographicTechniques and Equipment Beijing100049China Orbital Disease Institute the Third Medical Center of ChinesePLA General HospitalBeijing100039China Department of Otolaryngology the Third Medical Center ofChinese PLA General HospitalBeijing100039China

AIM: To investigate the diffusion changes in both the optic nerve and optic tract in orbital space-occupying lesion patients with decreased visual acuity, and its clinical significance using probabilistic diffusion tractography(PDT). METHODS: Twenty patients with orbital space-occupying lesions and 25 age-and gender-matched healthy persons were included. All patients and controls underwent routine orbital magnetic resonance imaging and diffusion tensor imaging(DTI), using a 3.0 T magnetic resonance scanner(Trio Tim Siemens). After the image data were preprocessed, each DTI parameters of the optic nerve and optic tract was obtained by PDT, including fractional anisotropy(FA), mean diffusivity(MD), axial diffusivity(AD) and radial diffusivity(RD). The asymmetry index(AI) of each parameter was calculated. Compared the parameters of the affected side optic nerve and ipsilateral optic tract with the contralateral side by paired sample t-test;compared AI of parameters of optic nerve and optic tract between the patient group and the control group by independent sample t-test. Patients were divided into threesubgroups according to the low vision grade standard of WHO, compared the FA and AI of FA between the three subgroups by single factor variance analysis. RESULTS: The affected side optic nerve presented significantly decreased FA, increased MD, AD, and RD values compared to the unaffected side(P0.05). The AIs of the FA value of the optic nerve in the eyesight luSION: FA, MD, AD, and RD of the affected side optic nerve of the orbital space-occupying lesions have significantly chang

关键词： orbital space-occupying lesions decreased vision optic never and optic tract probabilistic diffusion tractography magnetic resonance imaging

TaABI19 positively regulates grain development in wheat

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Journal of Integrative Agriculture 2023年第1期22卷 41-51页

作者： LIU Yun-chuan wang xiao-lu HAO Chen-yang IRSHAD Ahsan LI Tian LIU Hong-xia HOU Jian ZHANG Xue-yong National Key Facility for Crop Gene Resources and Genetic Improvement Key Laboratory of Biology and Genetic Improvement of Triticeae CropsMinistry of Agriculture/Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193P.R.China Institute of Cotton Research Chinese Academy of Agricultural SciencesAnyang 455000P.R.China National Key Facility for Crop Gene Resources and Genetic Improvement/National Center of Space Mutagenesis for Crop Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China

Starch is the most important component in the endosperm, and its synthesis is regulated by multiple transcription factors(TFs) in cereals. However, whether the functions of these TFs are conserved among cereals remains unclear. In this study,we cloned a B3 family TF in wheat, named TaABI19, based on its orthologous sequence in maize(Zea mays L.). Alignment of the DNA and protein sequences showed that ABI19 is conserved in maize and wheat(Triticum aestivum L.). We found that TaABI19 is highly expressed in young spikes and developing grains, and encodes a nucleus-localized transcriptional activator in wheat. The taabi19-b1 null mutants obtained by EMS exhibited a down-regulation of starch synthesis, shorter grain length and lower thousand-grain weight(TGW). Furthermore, we proved that TaABI19 could bind to the promoters of TaPBF homologous genes and enhance their expression. Haplotype association showed that TaABI19-B1 is significantly associated with TGW. We found that Hap2 and Hap3 were favored and had undergone positive selection in China’s wheat breeding programs. Less than 50% of the modern cultivars convey the favored haplotypes, indicating that TaABI19 still can be considered as a target locus for marker-assisted selection breeding to increase TGW in China.

关键词： common wheat transcription factor haplotype thousand grain weight

Two-in-one tecton strategy to construct single crystalline hydrogen-bonded organic framework with high proton conductivity above 100 °C

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Science China Chemistry 2023年

作者： xiao-lu wang Lin-Feng Liang Shuai Dou Xian-Ming Zhang Institute of Crystalline Materials Shanxi University Institute of Urban Environment Chinese Academy of Sciences College of Chemistry Taiyuan University of Technology

By tactically integrating two different kinds of proton donors and acceptors into one supramolecular tecton, a new crystalline hydrogen-bonded organic framework（HOF-SXU-1） has been developed. HOF-SXU-1 features a remarkable proton conductivity as high as 6.32 mS cm-1and an extremely low activation energy of 0.16 eV at 160 °C under anhydrous *** contrast, under identical conditions, the organic precursors of HOF-SXU-1 only exhibit negligible proton conduction performance, demonstrating that the formation of HOF is crucial for excellent proton conduction performance.

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高温下GFRP筋力学性能的试验研究

华南理工大学学报（自然科学版） 2011年第9期39卷 75-81页

作者：王晓璐査晓雄哈尔滨工业大学深圳研究生院广东深圳518055

为了研究高温下纤维增强复合材料(FRP)筋的力学性能,对直径为8mm的玻璃纤维增强复合材料(GFRP)筋进行了高温下的拉伸试验,获得了10～500℃范围内随着温度升高GFRP筋的极限强度和弹性模量的衰减趋势;并结合材料TG/DSC热学试验结果提出了G... 详细信息

为了研究高温下纤维增强复合材料(FRP)筋的力学性能,对直径为8mm的玻璃纤维增强复合材料(GFRP)筋进行了高温下的拉伸试验,获得了10～500℃范围内随着温度升高GFRP筋的极限强度和弹性模量的衰减趋势;并结合材料TG/DSC热学试验结果提出了GFRP筋在高温下的拉伸本构模型.该三参数拉伸本构模型以纤维和树脂的热学性能为基础,可简化为由树脂玻璃化温度和纤维丝软化/氧化温度控制的二参数模型.经验证,该二参数模型与文中及相关文献中的FRP筋的高温拉伸试验结果相吻合,具有较强的通用性,可推广应用于其他树脂材料和纤维类型的FRP筋中.

关键词：玻璃纤维增强复合材料筋高温拉伸试验热化学分析本构模型

Educational Reform and Practice of Experimental Course in Architectural Environment and Equipment Engineering Profession

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Educational Reform and Practice of Experimental Course in Ar...