印象唐风

总是在不断的学习与积累,总是在不断的写生和创作,总是在不断的读书与写作,总是在不断的游历和造访,总是在不断的在参加各种展览……     

与鲨共舞

鲨鱼摄影师Dan Callister讲述了他对大白鲨的迷恋,并告诉大家,电影《大白鲨》中关于鲨鱼的描述早已过时。01一条鲨鱼在经过Dan的笼子时,做出了一个好奇的动作,2010在海豹岛,鲨鱼通常在早晨大规模捕食——尤其是在日出后的两小时之内,当能见度还不是很好的时候。一般在日出后的两小时内,它们捕食的成功率在55%左右,然后在晚些时间下降到40%左右,之后它们便停止捕食。     

印象唐风

总是在不断的学习与积累,总是在不断的写生和创作,总是在不断的读书与写作,总是在不断的游历和造访,总是在不断的在参加各种展览……     

组合式提升管入口区颗粒的返混特性

根据文中提出的颗粒局部及整体返混比,对组合式提升管入口区颗粒的返混特性进行了研究,结果表明,在S型颗粒浓度轴向分布时,颗粒在床层底部的返混较小,在顶部的返混较大;而在指数形颗粒浓度轴向分布时,颗粒则在床层底部的返混较大,在顶部的返混较小.在不同操作条件下,床内颗粒具有不同的局部返混特性,在气速较高时,颗粒在床层中心的返混较少,在床层边壁的返混较多;在气速较低时,在床层顶部,颗粒在床层中心的返混较少,在床层边壁的返混较多,而在床层底部,颗粒则在床层中心和边壁处的返混较多,在床层中部的返混较少.     

书法在工艺美术中的装饰特点和意义——以呈现在陶瓷上为例

书法既是我国的文字,也是我国的艺术。在河南安阳地区挖掘的殷墟墓中,最早出现的文字是刻在龟壳上的甲骨文。这可以说是我国最早有文字记录的考证,随着文字的发展,到秦篆、汉隶再到唐楷,书法不断地发展。书法在成为我国的文字和交流的语言之后,它的艺术形式也在不断地发展,而且我国的书法在众多工艺美术中都有出现,比如夏商时期的铭文就是在刻在青铜上的文字以及刻在石壁上的碑文,还有就是刻在门匾和牌坊上的文字等等,都是我国书法在各种工艺美术上的装饰效果。发展至唐朝时期,书法则开始出现在陶瓷装饰上,乃至流传至今,书法艺术一直在陶瓷艺术中都有出现,本文主要论述书法在工艺美术上的装饰特点和意义,主要以在陶瓷上的装饰特点和意义为例。     

声音·观点

沃尔玛在供应链方面的巨大成就主要体现在效率方面 沃尔玛在供应链方面所取得的成就,主要体现在它的效率方面。在中国以及世界其他方面,我们看到生产力在大幅度的提升,我们整个的交通运输部门,     

咪鲜胺在粤浙两地水稻和土壤中残留动态

为了评价咪鲜胺在水稻上使用后的残留动态及环境安全性，在广东、浙江两地同时进行了咪鲜胺在水稻上的残留动态试验。结果表明：在广东地区，咪鲜胺在植株中的半衰期为2．59d，在土壤中的半衰期为2．46d，在稻田水的半衰期为0．46d；在浙江地区，咪鲜胺在植株中的半衰期为3．08d，在土壤中的半衰期为1．89d，在稻田水的半衰期为1．52d。收获的水稻糙米中咪鲜胺最终残留量均低于0．5mg／kg。     

丙烯至丙烯酸的催化气相氧化

一种将丙烯催化气相氧化成丙烯酸的方法，其中利用增加的丙烯装载量，在第一反应阶段中，在第一固定床催化剂上使反应气体原料混合物进行氧化；然后，在增加丙烯醛装载量的条件下，在第二反应段中，在第二固定床催化剂上，使第一反应阶段的含丙烯醛的产物气体混合物进行氧化；在两个反应阶段中的催化剂模塑体均为环形构形。     

名绣湘传

在抢救中研究,在研究中开发,在开发中保护,在保护中生产,在生产中传承,湘绣产业在行业自觉抱团的实践中,两条腿走市场之路,为传统手工行业树立了当之无愧的典范。看多了苏绣的猫,蜀绣的锦鲤,粤绣的孔雀。站在湘绣的狮虎面前,总觉得这绣过于霸气外露。这一有着2000多年历史的绣种,     

提升管喷嘴进料段内油、剂两相接触状况研究

在φ200mm提升管冷模实验装置上,采样局部固含率与喷嘴气体局部浓度之比考察了油剂二相在进料段四个轴向位置(H=0.375,0.675,1.075,1.375m)及不同操作参数(Ur=2.25-4.30 m·s-1,Ui=41.7~62.5m·s-1,Mi/Mi=0.29~4.21)下的接触状况.结果表明,浓度比在H=0.375m截面呈W形径向分布、油剂在床层中心和边壁的接触状况均较差;在H??O.675m的其它截面,浓度比呈U形径向分布、油剂在床层边壁的接触状况较差,在床层中心的接触状况较好.在H=0.375m截面,增加Ui及Mi/Mr使油剂在床层边壁的接触状况得到改善,在床层中心的的接触状况变差;而增加Ur则使油剂在床层边壁及中心的接触状况均变差.在H=0.675m截面,增加Uj、Mj/Mr或降低Ur使油剂在床内的接触状况得到改善.采用油剂匹配指数λ考察了油剂在进料段不同截面的平均接触状况.在Mi/Mr<2.15时,油剂在H=0.675m截面的接触状况最差;在Mi/Mr??2.15时,油剂在H=0.375m截面的的接触状况最差.此外,在H=0.675m截面,当Mj/Mr=0.29~0.54及1.05~2.37时,增加动量比可明显改善油剂接触状况;在其它轴向位置,当Mj/Mr=0.29~0.66时,增加动量比可明显改善油剂接触状况.     

Reactions in Stabilizer and Between Stabilizer and Nitrocellulose in Propellants

HPLC analysis of the stabilizer is one of the major methods in use for surveillance testing of diphenylamine (DPA) stabilized propellants. Often 0.2% DPA is used as a minimum content for safe propellants. In most cases the propellant can be stored much longer after this limit has been reached without any risk for self‐ignition. We report here about a reaction where DPA bonds to nitrocellulose, leaving a non extractable aromatic stabilizing compound left in the propellant, resulting in a longer time to autocatalysis than predicted. Diphenylnitramine is discussed as a possible intermediary compound occurring from the reaction between DPA and nitrocellulose. This should add to a better understanding of the degradation processes in propellants.     

中国台湾的催化和催化剂的研究开发

本文重点介绍了台湾省各大学和研究院所对催化及催化剂的教学。研究与开发方面动向,相关催化方面学科带头人的研究领域和主要成果,并给出大量参考文献。     

Designer enzyme and cell applications in industry and in environmental monitoring

Renewed world interest in enzyme biotechnological industries now derives from the expectation that many new biocatalysts will be created by genetic engineering associated with protein engineering designer techniques, or by chemical modification of existing enzymes by use of protein tailoring methods. The biocatalysts produced are mainly enzymes, abzymes (catalytic antibodies) and synthesis (synthetic analogues or mimics), and these will be used in industry, synthesis, therapy: and in bioanalysis of components of foodstuffs, and the environment including water, air and soil. The biocatalysts, including whole cells, are firstly incorporated into a particular bioreactor form by use of enzyme engineering techniques such as immobilization, and are then used, as appropriate, to modify their substrates. Improved processing or enhanced products are thereby achieved in the case of manufacturing industry: or monitoring signals are generated, often in the form of a measurable change in current flow, in the case of environmental biosensors. Designer enzymes and cells can be made now for identified applications where the presently available biocatalysts are inadequate, incompatible or uncompetitive.     

Salt-Induced Changes in Cytosolic pH and Photosynthesis in Tobacco and Potato Leaves

Salinity is one of the most common factors limiting the productivity of crops. The damaging effect of salt stress on many vital plant processes is mediated, on the one hand, by the osmotic stress caused by large concentrations of Na⁺ and Cl⁻ outside the root and, on the other hand, by the toxic effect of these ions loaded in the cell. In our work, the influence of salinity on the changes in photosynthesis, transpiration, water content and cytosolic pH in the leaves of two important crops of the Solanaceae family—tobacco and potato—was investigated. Salinity caused a decrease in photosynthesis activity, which manifested as a decrease in the quantum yield of photosystem II and an increase in non-photochemical quenching. Along with photosynthesis limitation, there was a slight reduction in the relative water content in the leaves and a decrease in transpiration, determined by the crop water stress index. Furthermore, a decrease in cytosolic pH was detected in tobacco and potato plants transformed by the gene of pH-sensitive protein Pt-GFP. The potential mechanisms of the salinity influence on the activity of photosynthesis were analyzed with the comparison of the parameters’ dynamics, as well as the salt content in the leaves.     

讲授中有研究，学习中有运用

本文从化学反应工程分析的讲授体会出发,分析探讨了硕士学位课程的性质,讲授过程中教材的选取、内容和方法的把握,以及如何根据学生的具体情况,采用更有针对性的课堂讲解的议题。     

Advances in Plant Metabolomics and Its Applications in Stress and Single-Cell Biology

In the past two decades, the post-genomic era envisaged high-throughput technologies, resulting in more species with available genome sequences. In-depth multi-omics approaches have evolved to integrate cellular processes at various levels into a systems biology knowledge base. Metabolomics plays a crucial role in molecular networking to bridge the gaps between genotypes and phenotypes. However, the greater complexity of metabolites with diverse chemical and physical properties has limited the advances in plant metabolomics. For several years, applications of liquid/gas chromatography (LC/GC)-mass spectrometry (MS) and nuclear magnetic resonance (NMR) have been constantly developed. Recently, ion mobility spectrometry (IMS)-MS has shown utility in resolving isomeric and isobaric metabolites. Both MS and NMR combined metabolomics significantly increased the identification and quantification of metabolites in an untargeted and targeted manner. Thus, hyphenated metabolomics tools will narrow the gap between the number of metabolite features and the identified metabolites. Metabolites change in response to environmental conditions, including biotic and abiotic stress factors. The spatial distribution of metabolites across different organs, tissues, cells and cellular compartments is a trending research area in metabolomics. Herein, we review recent technological advancements in metabolomics and their applications in understanding plant stress biology and different levels of spatial organization. In addition, we discuss the opportunities and challenges in multiple stress interactions, multi-omics, and single-cell metabolomics.     

EZH2 Down-Regulation Exacerbates Lipid Accumulation and Inflammation in in Vitro and in Vivo NAFLD

Non-alcoholic fatty liver disease (NAFLD) is one of the most prevalent, chronic liver diseases, worldwide. It is a multifactorial disease caused by complex interactions between genetic, epigenetic and environmental factors. Recently, several microRNAs, some of which epigenetically regulated, have been found to be up- and/or down-regulated during NAFLD development. However, in NAFLD, the essential role of the Polycomb Group protein Enhancer of Zeste Homolog 2 (EZH2), which controls the epigenetic silencing of specific genes and/or microRNAs by trimethylating Lys27 on histone H3, still remains unknown. In this study, we demonstrate that the nuclear expression/activity of the EZH2 protein is down-regulated both in livers from NAFLD rats and in the free fatty acid-treated HepG2. The drop in EZH2 is inversely correlated with: (i) lipid accumulation; (ii) the expression of pro-inflammatory markers including TNF-α and TGF-β; and (iii) the expression of miR-200b and miR-155. Consistently, the pharmacological inhibition of EZH2 by 3-Deazaneplanocin A (DZNep) significantly reduces EZH2 expression/activity, while it increases lipid accumulation, inflammatory molecules and microRNAs. In conclusion, the results of this study suggest that the defective activity of EZH2 can enhance the NAFLD development by favouring steatosis and the de-repression of the inflammatory genes and that of specific microRNAs.     

中国台湾的催化和催化剂的研究开发(续)

本文重点介绍了台湾省各大学和研究院所对催化及催化剂的教学、研究与开发方面动向,相关催化方面学科带头人的研究领域和主要成果,并给出大量参考文献。     

生物表面活性剂在日化行业的研究及应用进展

综述了生物表面活性剂在日化行业的研究进展和用于日化行业的生物表面活性剂新产品,探讨了生物表面活性剂在日化行业的应用优势及限制因素,指出了应对措施并对其在日化行业的应用前景进行了展望。