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环氧树脂增韧改性研究进展 被引量:11
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作者 蔡小霞 韩涛 +2 位作者 李聪 杨志洲 乔从德 《齐鲁工业大学学报》 2019年第3期29-34,共6页
环氧树脂具有机械强度高、收缩性小、加工性能好、吸水率低等特点,被广泛应用作防腐涂料、电气绝缘材料、纤维增强复合材料。环氧树脂基复合材料已成为工业领域中不可缺少的基础材料。但环氧树脂脆性大、耐冲击性差且容易开裂的缺点在... 环氧树脂具有机械强度高、收缩性小、加工性能好、吸水率低等特点,被广泛应用作防腐涂料、电气绝缘材料、纤维增强复合材料。环氧树脂基复合材料已成为工业领域中不可缺少的基础材料。但环氧树脂脆性大、耐冲击性差且容易开裂的缺点在很大程度上限制了它在很多领域中的应用。本文综述介绍了近年来有关环氧树脂的改性方法及其增韧效果,重点介绍了通过可回收利用的生物基资源增韧环氧树脂的方法。 展开更多
关键词 环氧树脂 增韧 生物基资源 力学性能
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Gene flow from transgenic roundup-ready soybean to wild soybean 被引量:3
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作者 Chen Xin Yan Jiyong +1 位作者 Gao Bing Peerasak srinives 《Agricultural Science & Technology》 CAS 2006年第1期8-13,共6页
A study was conducted in the field of the Institute of Vegetable Crops, Jiangsu province from July 2000 to August 2003. The transgenic roundup-ready soybean was sown in the middle of the field in a circular manner for... A study was conducted in the field of the Institute of Vegetable Crops, Jiangsu province from July 2000 to August 2003. The transgenic roundup-ready soybean was sown in the middle of the field in a circular manner for 5 circles, with the distance of 3 m, from one circle to another. Then the wild soybean was planted in plots as the rays of the circles in 8 directions (N, E, W, S, NE, NW, SE and SW), spaced every 5 m until 50 m. Each plot comprised 25 plants. In the second year, the wild soybean seeds from the first year were planted in the field together with the original wild soybean as check. Before flowering time, high concentrations of roundups (about 4-5 times of the normal dose) were sprayed on the plants and the surviving plants were identified. The leaves were taken to the lab for DNA extraction to determine the unique DNA for roundup-ready soybean (CTAB method). About 2% of the plants survived, but some leaves were yellow. One plant of wild soybean was found to have the roundup-ready gene from the original roundup-ready soybean. The other surviving wild soybeans should also had some fragments of the roundup tolerance gene. However, the DNA bands were not very clear in the PCR map. 展开更多
关键词 wild soybean roundup-ready gene gene flow
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Evaluation of the effects of Alkyl Phenolic compounds on kinetic coefficients and biomass activity in MBBR by means of respirometric techniques 被引量:1
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作者 Bijan Bina Farzaneh Mohammadi +2 位作者 Mohammad Mehdi Amin Hamid Reza Pourzamani Zeynab Yavari 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第4期822-829,共8页
The presence of Alkyl Phenols(APs) in aquatic systems is considered as one of the environmental concerns in recent decades which are generally used as surfactants. APs are endocrine disruptors and estrogen-mimicking,c... The presence of Alkyl Phenols(APs) in aquatic systems is considered as one of the environmental concerns in recent decades which are generally used as surfactants. APs are endocrine disruptors and estrogen-mimicking,causing harmful effects such as feminization and carcinogenesis on aquatic environment and human health.The most commercially important APs are 4-Nonyl Phenol(4-NP) and 4-tert-OctylP henol(4-t-OP). Moving bed biofilm reactor(MBBR), which combined attached and suspended growth advantages, is an advanced biological treatment process for municipal and industrial wastewaters that has drawn considerable attention from many researchers to remove toxic pollutants from wastewater. The aim of this research was to evaluate Bacterial activities and kinetic coefficients in the presence of APs. This study was carried out using laboratory-scale MBBR fed with synthetic wastewater containing 4-NP and 4-t-OP. The reactor was operated at different loads of chemical oxygen demand(COD) and APs and different hydraulic retention time(HRT). The respirometric technique was applied to investigate the effect of APs on heterotrophic and autotrophic activity and kinetic coefficients in biomass obtained from MBBR. Respirometric technique demonstrates a reliable tool in order to assess the biofilm kinetic coefficients and biomass viability to insert in the mathematical models. The calculated kinetic parameters were in the range of conventional and extended aeration activated sludge processes. The results demonstrate that APs have significant inhibitory effects on activity and growth rate of heterotrophic and autotrophic bacteria, heterotrophs have been less affected by the presence of 4-NP and 4-t-OP, and these compounds had greater inhibitory effects on autotrophic bacteria. 展开更多
关键词 Alkyl Phenols Autotrophs Heterotrophs Kinetic coefficients MBBR Respirometric techniques
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Research on Oxalate Oxidase and Its Genes in Plants 被引量:1
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作者 WANG Li WANG Xiao-li +2 位作者 LIU jia YI Zhi-gang DONG Zhi-min 《Agricultural Science & Technology》 CAS 2011年第1期11-13,19,共4页
This paper introduces the discovery,composition and structure of oxalate oxidase,as well as illustrates the biological functions of this enzyme.With a comprehensive introduction upon previous researches upon gene clon... This paper introduces the discovery,composition and structure of oxalate oxidase,as well as illustrates the biological functions of this enzyme.With a comprehensive introduction upon previous researches upon gene cloning and heredity transformation of this enzyme,it indicates that heredity transformation can increase the content of oxalate oxidase within the plants and also enhance their resistance.The paper also points out the problems such as lack of gene resources and difficulty in the transformation of heterologous genes,and the focus in later researches should be laid upon the exploration of plant resources relative to this enzyme and selection of resistant species. 展开更多
关键词 Oxalate oxidase(OXO) Biological functions Gene cloning Gene transformation
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浅谈生物质基碳材料制备及电化学性能
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作者 王诗益 《学园》 2018年第3期18-19,共2页
生物质基碳资源是一种可再生资源,具有种类多、数量丰富、成本低廉等优势。通过对生物质基碳资源的开发与利用,将其转化为可供工业生产、人类生活的资源,不仅能达到节能降耗的目的,而且还能避免环境污染。因此,本文简要介绍生物质基碳... 生物质基碳资源是一种可再生资源,具有种类多、数量丰富、成本低廉等优势。通过对生物质基碳资源的开发与利用,将其转化为可供工业生产、人类生活的资源,不仅能达到节能降耗的目的,而且还能避免环境污染。因此,本文简要介绍生物质基碳资源的制备以及电化学性能,以期推动我国再生资源事业的进一步发展。 展开更多
关键词 生物资源 制备 电化学性能
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