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Molecular cloning,characterization and expression analysis of Sox9a and Foxl2 genes in half-smooth tongue sole(Cynoglossussemilaevis) 被引量:20
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作者 DONG Xiaoli CHEN Songlin +1 位作者 JI Xiangshan SHAO Changwei 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2011年第1期68-77,共10页
Two transcription factors, Sox9a and Foxl2 were cloned from half-smooth tongue sole (Cynoglossus semilaevis). Sox9a is a new duplication of C.semilaevis Sox9 gene. The complete cDNA of Sox9a gene was 1 842 bp long c... Two transcription factors, Sox9a and Foxl2 were cloned from half-smooth tongue sole (Cynoglossus semilaevis). Sox9a is a new duplication of C.semilaevis Sox9 gene. The complete cDNA of Sox9a gene was 1 842 bp long coding for 487 amino acids and Foxl2 gene was 1 817 bp coding for 308 amino acids. Sox9a was expressed higher in male brain, pituitary and gonad and Foxl2 were higher in female brain, pituitary and gonad. The expression of Sox9a gene in gonads of neo-males was higher than that of normal females. Sox9a and Foxl2 were expressed higher in gastrula stage than in other stages. In the period of sex differentiation, the expression of Sox9a was first going up and then going down and Foxl2 was higher expressed at 37 dph. The highest expressions of Sox9a and Foxl2 genes occurred in nine-month and 12-month old gonad tissues, respectively. Sox9a gene was considered to have inevitable links with sex reversal, sex differentiation and cell differentiation of embryos and formation of spermatogenic ceils. Foxl2 was considered to play a role in sex differentiation, cell differentiation of embryos but not to be necessary for sex determination and sex reversal. 展开更多
关键词 half-smooth tongue sole Cynoglossus semilaevis SOX9 FOXL2 real-time PCR sexreversal neo-male
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影响鞋底静态防滑性能因素分析 被引量:18
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作者 路正辉 《皮革与化工》 CAS 2013年第5期13-17,共5页
防滑性作为鞋底功能性最重要的指标之一,对鞋子穿着的安全性和舒适性具有重要的意义。本文着重对影响鞋底静态防滑性能的几个要素作了分析,在干、湿两种状态下,通过测定静摩擦系数表征各种材料的防滑性能,对不同场合选购合适鞋子给出合... 防滑性作为鞋底功能性最重要的指标之一,对鞋子穿着的安全性和舒适性具有重要的意义。本文着重对影响鞋底静态防滑性能的几个要素作了分析,在干、湿两种状态下,通过测定静摩擦系数表征各种材料的防滑性能,对不同场合选购合适鞋子给出合理化建议。 展开更多
关键词 鞋底 防滑性 静摩擦系数
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划线定点法和传统定位法应用于新生儿足底采血的比较 被引量:17
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作者 郭锡素 鲁婷华 冉启蓉 《中国实用护理杂志(中旬版)》 2006年第10期33-34,共2页
目的通过比较划线定点法和传统定位法应用于新生儿足底采血的效果,探讨一种较佳的新生儿足底采血方法。方法将140例足月正常新生儿随机分为划线定点组(A组)和传统定位组(B组),每组各70例,分别采用不同的方法进行足底采血。观察并比较2... 目的通过比较划线定点法和传统定位法应用于新生儿足底采血的效果,探讨一种较佳的新生儿足底采血方法。方法将140例足月正常新生儿随机分为划线定点组(A组)和传统定位组(B组),每组各70例,分别采用不同的方法进行足底采血。观察并比较2组采血的一次成功率,总采血时间,采血前、采血期间、采血后1,2,3min时的心率(HR)、平均动脉压(MAP)及脉搏氧饱和度(SpO2),采血后采血部位红肿程度等的变化。结果足底采血划线定点法的一次成功率显著高于传统定位法,前者的采血时间明显短于后者,前者采血前后HR、MAP及SpO2波动时间明显短于后者。前者采血后采血部位红肿程度明显小于后者。结论新生儿足底采血划线定点法优于传统定位法。 展开更多
关键词 新生儿 足底 采血
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保障与限制:对质询问权在欧洲人权法院的实践及其启示 被引量:17
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作者 孙长永 胡波 《现代法学》 CSSCI 北大核心 2016年第3期109-123,共15页
欧洲人权法院在其审判实践中,对《欧洲人权公约》第6条第3款d项规定的对质询问权所应具备的公正要素,包括口头询问、证人出庭、平等武装以及官方义务进行了有条件的限缩,但同时也提出了"唯一或决定性"规则作为底线性保障。对... 欧洲人权法院在其审判实践中,对《欧洲人权公约》第6条第3款d项规定的对质询问权所应具备的公正要素,包括口头询问、证人出庭、平等武装以及官方义务进行了有条件的限缩,但同时也提出了"唯一或决定性"规则作为底线性保障。对于一项最低限度的基本权利,欧洲人权法院的保障与限制,无疑关乎其对"公正"审判标准的界定。对质询问权在欧洲人权法院的实践对我国的司法实践无疑也具有借鉴意义。 展开更多
关键词 对质询问 公正审判 证人 唯一 决定性
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预制复合皮瓣修复足底负重区软组织缺损初步报告 被引量:14
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作者 王剑利 王成琪 +1 位作者 付兴茂 庞昌金 《中华显微外科杂志》 CSCD 北大核心 2000年第2期99-101,共3页
目的 研究解决足底负重区损伤软组织修复与重建后足底耐压耐磨及感觉功能的问题。 方法 用健侧足心皮片预制到供区皮瓣上 ,4~ 5周后切取带感觉神经复合皮瓣游离移植 ,使足心皮肤植于患足承重受力区。 结果 临床应用 6例随访 6~ 1... 目的 研究解决足底负重区损伤软组织修复与重建后足底耐压耐磨及感觉功能的问题。 方法 用健侧足心皮片预制到供区皮瓣上 ,4~ 5周后切取带感觉神经复合皮瓣游离移植 ,使足心皮肤植于患足承重受力区。 结果 临床应用 6例随访 6~ 19个月 ,功能优 3例 ,良 2例。 结论 利用预制足心皮片的带有感觉神经复合皮瓣修复足底可以较好地恢复足底耐磨耐压的特有功能。 展开更多
关键词 足底 软组织缺损 预制复合皮瓣 修复
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差分拉曼光谱结合聚类分析检验运动鞋鞋底 被引量:14
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作者 张进 姜红 +2 位作者 张景顺 刘峰 段斌 《中国塑料》 CAS CSCD 北大核心 2020年第7期80-85,共6页
为建立一种快速、准确、无损的区分检验运动鞋鞋底的方法,采用差分拉曼光谱仪结合聚类分析方法对40个不同品牌,不同系列的白色运动鞋鞋底样品进行了检验研究。结果表明,根据鞋底样品的主要成分不同可将样品分为5类;同一类样品可依据添... 为建立一种快速、准确、无损的区分检验运动鞋鞋底的方法,采用差分拉曼光谱仪结合聚类分析方法对40个不同品牌,不同系列的白色运动鞋鞋底样品进行了检验研究。结果表明,根据鞋底样品的主要成分不同可将样品分为5类;同一类样品可依据添加的主要填料成分不同进行分组;同一组样品可依据特征峰的相对峰高比不同进行区分;利用聚类分析方法处理样品数据,当并类距离为2时,样品被分为5类,分类结果较为理想。该方法操作简便快速、结果准确可靠且无损检材,可为公安机关实际办案提供帮助。 展开更多
关键词 差分拉曼光谱 鞋底 填料 聚类分析
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Isolation and Characterization of Pathogenic Listonella anguillarum of Diseased Half-Smooth Tongue Sole(Cynoglossus semilaevis Günther) 被引量:13
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作者 TANG Xiaoqian ZHOU Li ZHAN Wenbin 《Journal of Ocean University of China》 SCIE CAS 2008年第3期343-351,共9页
Studies were conducted to determine the cause of the acute mortality of half-smooth tongue sole Cynoglossus semilaevis Günther juveniles in a fish farm in Jimo, Shandong Province, China, in June 2006. Gross signs... Studies were conducted to determine the cause of the acute mortality of half-smooth tongue sole Cynoglossus semilaevis Günther juveniles in a fish farm in Jimo, Shandong Province, China, in June 2006. Gross signs of the diseased tongue sole included several petechiae and ecchymoses on the body and fin necrosis and hemorrhagic lesion at the base of the fin. Bacteria were isolated from kidney, liver and hemorrhagic lesions of the diseased tongue sole. Among 14 strains, SJ060621 was proved to be highly virulent to juvenile tongue sole with LD50 value of 〈1.0×10^5 colony forming units (CFU)mL^-1, while the remaining 13 were avirulent. Among the 16 antibiotics tested, SJ060621 was sensitive to gentamicin and nitrofurantoin. It was identified as Listonella anguillantm with conventional plate and tube tests in combination with API 20E analysis. 16S rRNA gene and partial HSP60 gene sequenceing analysis revealed that the strain was highly homologous with L. anguillarum. Examination of the infected musculature by electron microscopy indicated numerous bacteria and lots of macrophages containing phagocytosed bacteria. Histopathological investigations revealed severe necrotic degenerative changes in the infected organs. Indirect immunofluorescence assay (IFA) was employed to detect the location of occurrence of bacteria, and bacteria were found in aggregations in the inflammatory areas in musculature. 展开更多
关键词 half-smooth tongue sole Cynoglossus semilaevis Günther Listonella anguillarum 16S rRNA gene HSP60 gene HISTOPATHOLOGY IFA
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Characteristics of soil microbial community functional and structure diversity with coverage of Solidago Canadensis L 被引量:11
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作者 廖敏 谢晓梅 +2 位作者 彭英 柴娟娟 陈娜 《Journal of Central South University》 SCIE EI CAS 2013年第3期749-756,共8页
The relationship between Solidago canadensis L. invasion and soil microbial community diversity including functional and structure diversities was studied across the invasive gradients varying from 0 to 40%, 80%, and ... The relationship between Solidago canadensis L. invasion and soil microbial community diversity including functional and structure diversities was studied across the invasive gradients varying from 0 to 40%, 80%, and 100% coverage of Solidago canadensis L. using sole carbon source utilization profiles analyses, principle component analysis (PCA) and phospholipid fatty acids (PLFA) profiles analyses. The results show the characteristics of soil microbial community functional and structure diversity in invaded soils strongly changed by Solidago canadensis L. invasion. Solidago canadensis L. invasion tended to result in higher substrate richness, and functional diversity. As compared to the native and ecotones, average utilization of specific substrate guilds of soil microbe was the highest in Solidago canadensis L. monoculture. Soil microbial functional diversity in Solidago canadensis L. monoculture was distinctly separated from the native area and the ecotones. Aerobic bacteria, fungi and actinomycetes population significantly increased but anaerobic bacteria decreased in the soil with Solidago canadensis L. monoculture. The ratio of cyl9:0 to 18:1 co7 gradually declined but mono/sat and fung/bact PLFAs increased when Solidago canadensis L. became more dominant. The microbial community composition clearly separated the native soil from the invaded soils by PCA analysis, especially 18: lco7c, 16: lco7t, 16: lco5c and 18:2co6, 9 were present in higher concentrations for exotic soil. In conclusion, Solidago canadensis L. invasion could create better soil conditions by improving soil microbial community structure and functional diversity, which in turn was more conducive to the growth ofSolidago canadensis L. 展开更多
关键词 sole carbon source utilization phospholipid fatty acids structure diversity functional diversity Solidago canadensis L.
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Development and characterization of a cell line from the embryos of half smooth tongue sole (Cynoglossus semilaevis) 被引量:7
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作者 SHA Zhenxia REN Guocheng +2 位作者 WANG Xianli WANG Na CHEN Songlin 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2010年第2期81-87,共7页
A new cell line, CSEC, has been successfully established from embryos at gastrula stage of a cultured marine fish, half smooth tongue sole (Cynoglossus sernilaevis). CSEC cells grow actively and stably more than 50 ... A new cell line, CSEC, has been successfully established from embryos at gastrula stage of a cultured marine fish, half smooth tongue sole (Cynoglossus sernilaevis). CSEC cells grow actively and stably more than 50 passages for over 200 d in DMEM medium supplemented with 15% FBS (fetal bovine serum), 2.5 ng/cm^3 bFGF (basic fibroblast growth factor), 1 ng/cm^3 LIF (leukemia inhibitory factor) and 50 mmol/dm^3 2-ME (2-mecaptoethanol). The cells grew well in the temperature range of 24-30 ℃ and the optimal growth temperature was 24 ℃. FBS and bFGF concentrations are the two key components for CSEC cells proliferation. Chromosome analysis reveals that CSEC cells have a normal diploid karyotype with 2n=42t. The significant fluorescent signals were observed in CSEC after transfection with the GFP reporter gene, suggesting that the CSEC cell line can be used as a useful tool for transgenic and genetic manipulation studies. CSEC cells showed the cytopathic effect (CPE) after infection with lymphosystis disease virus (LCDV) in 2 d. Moreover, the LCDV particles can be observed in the cytoplasm of virus-infected cells by electron microscopy. It suggests that CSEC could be potentially used for the study of aquatic virus. 展开更多
关键词 embryonic cell line half smooth tongue sole KARYOTYPE GFP LCDV CSEC
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聚(醚-酯)型聚氨酯微孔弹性体鞋底材料 被引量:7
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作者 查刘生 吴明元 +1 位作者 杨建军 鲁希华 《合成橡胶工业》 EI CAS CSCD 1998年第4期233-235,共3页
将聚醚多元醇和聚酯多元醇的混合,以水为发泡剂,三乙烯二胺和辛酸亚锡的复合物为催化剂,1,4-丁二醇为扩链剂,聚硅氧烷为匀泡剂,可制备聚(醚-酯)型聚氨酯微孔鞋底材料,其物理机械性能优于GB10508—89指标,成本比... 将聚醚多元醇和聚酯多元醇的混合,以水为发泡剂,三乙烯二胺和辛酸亚锡的复合物为催化剂,1,4-丁二醇为扩链剂,聚硅氧烷为匀泡剂,可制备聚(醚-酯)型聚氨酯微孔鞋底材料,其物理机械性能优于GB10508—89指标,成本比纯聚酯型聚氨酯的低10%~15%。用正交试验确定的最优配方(质量份)为:聚醚多元醇60,聚酯多元醇40,MDI42,液化MDI7,扩链剂8,催化剂0.6,匀泡剂0.7,水0.06。 展开更多
关键词 聚氨酯 微孔弹性体 鞋底材料 弹性体 制鞋
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Nitrogen uptake and transfer in broad bean and garlic strip intercropping systems 被引量:5
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作者 TANG Qiu-xiang Haile Tewolde +6 位作者 LIU Hong-bin REN Tian-zhi JIANG Ping-an ZHAI Li-mei LEI Bao-kun LIN Tao LIU En-ke 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第1期220-230,共11页
Utilization and transfer of nitrogen (N)in a strip intercropping system of garlic (Allium safivum L.) and broad bean (Vicia faba L.) have been investigated rarely. The objectives of this study were to quantify N... Utilization and transfer of nitrogen (N)in a strip intercropping system of garlic (Allium safivum L.) and broad bean (Vicia faba L.) have been investigated rarely. The objectives of this study were to quantify N uptake and utilization by intercropped broad bean and garlic and determine the magnitude of N transfer from broad bean to garlic. Field and pot trials were carried out in the Erhai Lake Basin in China using ^15N tracer applied to the soil or injected into broad bean plants. Strip intercropping of garlic and broad bean increased N absorption (47.2%) compared with sole crop broad bean (31.9%) or sole crop garlic (40.7%) and reduced soil residual N. Nearly 15% of 15N injected into petioles of broad bean intercropped with garlic was recovered in garlic at harvest, suggesting that N could be transferred from broad bean to strip intercropped garlic. The findings provide a basis for evaluating legumes' role in optimizing N fertilization when intercropped with non-legumes. 展开更多
关键词 legumes sole crop 1SN abundance nitrogen isotope rhizoshpere
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Hierarchical Voronoi Structure Inspired by Cat Paw Pads Substantially Enhances Landing Impact Energy Dissipation
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作者 Da Lu Baoqing Pei +6 位作者 Yangyang Xu Mengyuan Hu Shijia Zhang Le Zhang Xin Huang Yangwei Wang Xueqing Wu 《Journal of Bionic Engineering》 SCIE EI CSCD 2024年第4期1847-1861,共15页
When a human lands from a high drop,there is a high risk of serious injury to the lower limbs.On the other hand,cats can withstand jumps and falls from heights without being fatally wounded,largely due to their impact... When a human lands from a high drop,there is a high risk of serious injury to the lower limbs.On the other hand,cats can withstand jumps and falls from heights without being fatally wounded,largely due to their impact-resistant paw pads.The aim of the present study was to investigate the biomechanism of impact resistance in cat paw pads,propose an optimal hierarchical Voronoi structure inspired by the paw pads,and apply the structure to bionic cushioning shoes to reduce the impact force of landing for humans.The microstructure of cat paw pads was observed via tissue section staining,and a simulation model was reconstructed based on CT to verify and optimize the structural cushioning capacity.The distribution pattern,wall thickness of compartments,thickness ratio of epidermis and dermis,and number of compartments in the model were changed and simulated to achieve an optimal composed structure.A bionic sole was 3D-printed,and its performance was evaluated via compression test and a jumping-landing experiment.The results show that cat paw pads are a spherical cap structure,divided from the outside to the inside into the epidermis,dermis,and compartments,each with different cushioning capacities.A finite element simulation of different cushioning structures was conducted in a cylinder with a diameter of 20 mm and a height of 10 mm,featuring a three-layer structure.The optimal configuration of the three layers should have a uniform distribution with 0.3–0.5 mm wall thickness,a 1:1–2 thickness ratio of epidermis and dermis,and 100–150 compartments.A bionic sole with an optimized structure can reduce the peak impact force and delay the peak arrival time.Its energy absorption rate is about 4 times that of standard sole.When jumping 80,100,and 120 cm,the normalized ground reaction force is also reduced by 8.7%,12.6%and 15.1%compared with standard shoes.This study provides theoretical and technical support for effective protection against human lower limb landing injuries. 展开更多
关键词 Cat paw pads Hierarchical Voronoi structure Landing impact Energy dissipation Bionic sole
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结构设计对运动鞋减震及抗扭转功能的影响 被引量:6
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作者 胡朝洋 《中外鞋业》 2017年第11期28-30,共3页
从鞋底缓震、鞋的抗扭转能力两方面,分析了结构设计对运动鞋功能的影响.研究得出:穿着具有减震功能的运动鞋可以缓冲地面冲击力,减少给人体膝盖、脚踝等处带来的损伤;运动时选择尽量贴合脚部且鞋底不宜过厚及鞋底比较防滑的运动鞋,可以... 从鞋底缓震、鞋的抗扭转能力两方面,分析了结构设计对运动鞋功能的影响.研究得出:穿着具有减震功能的运动鞋可以缓冲地面冲击力,减少给人体膝盖、脚踝等处带来的损伤;运动时选择尽量贴合脚部且鞋底不宜过厚及鞋底比较防滑的运动鞋,可以起到抗扭转且保护膝盖的作用. 展开更多
关键词 运动鞋 鞋底 缓震 鞋面 材质 抗扭转能力
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Changes of Soil Microbiological Characteristics After Solidago canadensis L. Invasion 被引量:4
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作者 LIAO Min XIE Xiao-mei +1 位作者 PENG Ying MA Ai-li 《Agricultural Sciences in China》 CAS CSCD 2011年第7期1064-1071,共8页
The relationship between Solidago canadensis L. invasion and soil microbial communities was studied across the invasive gradients varying from 0 to 40, 80, and 100% coverage of S. canadensis. The results showed both s... The relationship between Solidago canadensis L. invasion and soil microbial communities was studied across the invasive gradients varying from 0 to 40, 80, and 100% coverage of S. canadensis. The results showed both soil microbial biomass C (Cmic) and N (Nmic) increased as the coverage of S. canadensis increased. Soil microbial quotient Cmic/Corg (microbial biomass C/organic C) tended to increase linearly with the coverage of S. canadensis. Soil basal respiration (BR) also showed a similar trend. The soil respiratory quotient qCO2 decreased with S. canadensis invasion, and remained at quite a constantly low level in the invasive soils. Sole carbon source utilization profiles analyses indicated that S. canadensis invasion tended to result in higher microbial functional diversity in the soil. Average utilization of specific substrate guilds was highest in the soil with S. canadensis monoculture. Principle component analysis of sole carbon source utilization profiles further indicated that microbial functional diversity in the soil with S. canadensis monoculture was distinctly separated from those soils in the native area and the ecotones. In conclusion, S. canadensis invasion improved soil microbial biomass, respiration and utilization of carbon sources, and decreased qCO2, thus created better soil conditions, which in turn were more conducive to the growth of S. canadensis. 展开更多
关键词 sole carbon source utilization functional diversity microbial biomass microbial respiratory Solidago canadensis
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Analysis of DNA Methylation Level by Methylation-Sensitive Amplification Polymorphism in Half Smooth Tongue Sole(Cynoglossus semilaevis)Subjected to Salinity Stress 被引量:4
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作者 LI Siping HE Feng +5 位作者 WEN Haishen LI Jifang SI Yufeng LIU Mingyuan HE Huiwen HUANG Zhengju 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第2期269-278,共10页
Increasingly arisen environmental constraints may contribute to heritable phenotypic variation including methylation changes,which can help the animals with development,growth and survival.In this study,we assessed th... Increasingly arisen environmental constraints may contribute to heritable phenotypic variation including methylation changes,which can help the animals with development,growth and survival.In this study,we assessed the DNA methylation levels in three tissues(gonad,kidney and gill) of half smooth tongue sole under the salinity stress.The methylation-sensitive amplification polymorphism(MSAP) technique was applied to illustrate the regulation of epigenetic mechanism in environmental stimuli.Fish were subjected to 15 salinity treatment for 7 and 60 days,respectively.A total of 11259 fragments were amplified with 8 pairs of selective primers.The levels of methylated DNA in different tissues of females and males without salinity stress were analyzed,which were 32.76% and 47.32% in gonad;38.13% and 37.69% in kidney;37.58% and 34.96% in gill,respectively.In addition,the significant difference was observed in gonad between females and males,indicating that discrepant regulation in gonadal development and differentiation may involve sex-related genes.Further analysis showed that total and hemi-methylation were significantly decreased under 15 salinity for 7 days,probably resulting in up-regulating salt-tolerance genes expression to adjust salt changing.With the adjustment for 60 days,total and hemi-methylation prominently went back to its normal levels to obtain equilibrium.Particularly,full methylation levels were steady along with salinity stress to maintain the stability of gene expression.Additionally,the data showed that gonads in females and gills in males were superior in adaptability.As a result,DNA methylation regulates tissue-specific epiloci,and may respond to salinity stress by regulating gene expression to maintain animal survival and activity. 展开更多
关键词 DNA METHYLATION diversity HALF SMOOTH TONGUE sole salinity stress MSAP
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鞋底防滑性能的影响因素和分析 被引量:5
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作者 张园芳 《鞋类工艺与设计》 2021年第21期17-19,共3页
鞋底的防滑性能优劣乃是评定一双鞋子质量、性能优质与否的重要维度之一,良好的鞋底防滑性能对于满足人们的日常所需,提升顾客的满意度、忠诚度以及品牌形象的长久维护大有裨益。鞋底防滑性作为鞋功能性的核心指标之一,本文从实际出发,... 鞋底的防滑性能优劣乃是评定一双鞋子质量、性能优质与否的重要维度之一,良好的鞋底防滑性能对于满足人们的日常所需,提升顾客的满意度、忠诚度以及品牌形象的长久维护大有裨益。鞋底防滑性作为鞋功能性的核心指标之一,本文从实际出发,首先简要分析了防滑性能的表征;随后,重点从鞋底接触面积、鞋底材料以及鞋底花纹这三个维度论述了鞋底防滑性能的影响因素及其相关分析,进而提升鞋底的防滑性能与防滑效果,以期为该领域的未来发展指明方向。 展开更多
关键词 鞋底 防滑性能 防滑效果 影响因素
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五种不同底材之间的性能对比 被引量:5
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作者 弓太生 潘美丽 《皮革科学与工程》 CAS 北大核心 2010年第5期73-75,共3页
以橡胶、TPR、PU、PVC和EVA五种常见的鞋底材料为研究对象,分别测试了材料的止滑性、减震性和耐磨性,并对五种不同底材之间的性能差异进行了分析对比。试验结果表明:五种底材的止滑性大小为:橡胶>TPR>PVC>PU>EVA;减震性大小... 以橡胶、TPR、PU、PVC和EVA五种常见的鞋底材料为研究对象,分别测试了材料的止滑性、减震性和耐磨性,并对五种不同底材之间的性能差异进行了分析对比。试验结果表明:五种底材的止滑性大小为:橡胶>TPR>PVC>PU>EVA;减震性大小为:EVA>TPR>PVC>PU>橡胶;耐磨性大小为:PU>橡胶>TPR>EVA>PVC。 展开更多
关键词 底材 减震性 止滑性 耐磨性
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“极简”地介入——从几个实例看历史建筑的更新 被引量:4
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作者 罗湘蓉 黄水坤 《新建筑》 2007年第3期113-116,共4页
随着城市建设的深入发展,历史建筑的更新改造已成为今日城市发展的必然趋势。通过介绍四个有代表性和国际影响的建筑实例,从形体、材料、技术三个层面分析了这些改建或扩建项目中的新增体量。提出新增体量以单一、完整、纯几何化的建筑... 随着城市建设的深入发展,历史建筑的更新改造已成为今日城市发展的必然趋势。通过介绍四个有代表性和国际影响的建筑实例,从形体、材料、技术三个层面分析了这些改建或扩建项目中的新增体量。提出新增体量以单一、完整、纯几何化的建筑形态直接介入历史场所,通过与历史建筑的对比而融入原有环境,在尊重历史的同时展现当代的文化特征并最终成为历史建筑新生的标志已成为同类工程项目中一种有代表性的创作理念。 展开更多
关键词 历史场所 单一 完整 标志
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多因子交互作用对鞋子止滑性能影响的研究 被引量:5
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作者 杜坚 丁绍兰 +1 位作者 陈钊钰 杨承杰 《皮革科学与工程》 CAS 北大核心 2009年第6期22-27,共6页
选择4种鞋底材料、4种地面、4种污染物和5种花纹沟槽设计,进行了4因素3重复试验,测定鞋底的摩擦系数COF值。结果表明:各因素之间的交互作用(P<0.0001)都会显著地影响COF值。在受水、水和清洁剂混合污染的大理石地面,较大花纹宽度的P... 选择4种鞋底材料、4种地面、4种污染物和5种花纹沟槽设计,进行了4因素3重复试验,测定鞋底的摩擦系数COF值。结果表明:各因素之间的交互作用(P<0.0001)都会显著地影响COF值。在受水、水和清洁剂混合污染的大理石地面,较大花纹宽度的PU鞋底具有较好的防滑性能(COF>0.7)。受油污染的大理石地面,1.2 cm沟槽宽度的EVA和PU鞋底具有较好的止滑性;在水和清洁剂混合污染的地面,1.2 cm花纹宽度的PU鞋底的COF值最高;在油污染的水泥地面,1.2 cm花纹宽度的EVA鞋底的COF值最高。 展开更多
关键词 底防滑性能 交互作用 橡胶
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Comparative evaluation of modified neem leaf, neem leaf and woodash extracts on soil fertility improvement, growth and yields of maize (<i>Zea mays</i>L.) and watermelon (<i>Citrullus lanatus</i>) (Sole and Intercrop) 被引量:3
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作者 Emmanuel Ibukunoluwa Moyin-Jesu 《Agricultural Sciences》 2012年第1期90-97,共8页
Two field experiments were carried out at Akure (7oN, 5o101E) in the rainforest zone of Nigeria in 2006 and 2007 to determine the effectiveness of neem leaf, woodash and modified neem leaf extracts as fertilizer sourc... Two field experiments were carried out at Akure (7oN, 5o101E) in the rainforest zone of Nigeria in 2006 and 2007 to determine the effectiveness of neem leaf, woodash and modified neem leaf extracts as fertilizer sources in improving soil fertility, growth and yield of maize (Zea mays L) and watermelon (Citrulus lanatus) sole and intercrop. There were six treatments namely, poultry manure, neem leaf extract (sole), woodash extract, modified neem leaf (neem leaf + woodash), NPK 15-15-15 and a control (no fertilizer nor extract), replicated three times and arranged in a randomized complete block design (RCB). The extracts (neem leaf, wood ash and modified neem leaf) were applied at 1200 litres per hectare each, NPK 15-15-15 at 300 kg/ha and poultry was applied at 6t/ha. The results showed that there were significant increases (P 2O), K, Ca, Mg, Na, O.M, P and N compared to NPK 15-15-15 and neem leaf extract. For instance, modified neem leaf extract increased soil pH (H2O), K, Ca, Mg, Na, O.M, P and N by 12.4%, 32.8%, 25%, 23.7%, 19.32%, 17.24% and 20% respectively compared to neem leaf extract under intercrop plot. The high soil K/Ca, K/Mg and P/Mg ratios in the NPK 15-15-15 fertilizer treatment led to an imbalance in the supply of P, K, Ca and Mg nutrients to maize and watermelon crops. The least values for growth, yield and soil parameters were recorded under the control treatment. In these experiments, modified neem leaf extract (woodash + neem leaf extracts) applied at 1200 litres/ha was the most effective in improving soil fertility, growth and yield of maize and watermelon (sole and intercrop) and could substitute for 6 tons per hectare of poultry manure and 300kg/ha of NPK 15-15-15 fertilizer. 展开更多
关键词 Modified NEEM LEAF NEEM LEAF Wood Ash Extracts Maize and WATERMELON (Intercrop and sole) Land Equivalent Ratio Relative Yield Poultry Manure
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