共振光散射法测定环境水样中痕量锡

基于在Tris-HCl介质中,痕量锡对氯酚红-人血白蛋白-十二烷基硫酸钠体系的共振散射光谱有明显的猝灭作用;考察了它们的光谱特征、影响因素和适宜的反应条件;确定了散射光强度与Sn2 的关系,从而建立了测定痕量锡的共振光散射新方法.该法在室温下进行,操作方便,灵敏度高和选择性好.其线性范围为0.2-4.0μg/L,检出限0.12μg/L,用于环境水样中痕量Sn2 的测定,相对标准偏差小于3.1%,加标回收率为95.5%-100.5%,效果良好.     

花状Cu_2O/Cu复合材料的光催化性能

不采用任何模板,利用原位逐步水热方法一次性合成了花状Cu2O/Cu复合材料.采用X射线衍射、扫描电镜、高分辨透射电镜和自动吸附仪对样品的相结构、形貌和比表面积进行了表征.以偶氮染料Procion Red MX-5B为探针分子,对复合催化剂进行了可见光催化表征.结果表明该复合催化剂中的Cu和Cu2O之间存在相互作用,其催化活性远高于单相Cu2O和商用P25粉末,有望成为污水治理的新型材料.     

Fluorescent Temporin B Derivative and its Binding to Liposomes

Temporins are short (10–13 amino acids) and linear antimicrobial peptides first isolated from the skin of the European red frog, Rana temporaria, and are effective against Gram-positive bacteria and Candida albicans. Similarly to other antimicrobial peptides, the association of temporins to lipid membranes has been concluded to underlie their antimicrobial effects. Accordingly, a detailed understanding of their interactions with phospholipids is needed. We conjugated a fluorophore (Texas Red) to a Cys containing derivative of temporin B (temB) and investigated its binding to liposomes by fluorescence spectroscopy. Circular dichroic spectra for the Cys-mutant recorded in the absence and in the presence of phospholipids were essentially similar to those for temB. A blue shift in the emission spectra and diminished quenching by ferrocyanide (FCN) of Texas Red labeled temporin B (TRC-temB) were seen in the presence of liposomes. Both of these changes can be attributed to the insertion of the Texas Red into the hydrophobic region of the bilayer. Resonance energy transfer, steady state anisotropy, and fluorescence lifetimes further demonstrate the interaction of TRC-temB with liposomes to be enhanced by negatively charged phospholipids. Instead, cholesterol attenuates the association of TRC-temB with membranes. The interactions between TRC-temB and liposomes of varying negative surface charge are driven by electrostatics as well as hydrophobicity. Similarly to native temporin B also TRC-temB forms amyloid type fibers in the presence of negatively charged liposomes. This property is likely to relate to the cytotoxic activity of this peptide.     

关于红层特点及分布规律的初步探讨

红层为红色的陆相碎屑沉积物，形成于古盆地和湖泊环境，主要形成于炎热、干燥的地质时期。红层岩石组成多为砂岩和砾岩，并夹粉砂岩、页岩、泥岩、灰岩、石膏及岩盐等，红层的沉积结构和构造具有一定的规律性。红层是地壳演化到一定历史阶段的产物，它不只是中新生代的产物，在古生代也有红层发育与分布。中国的红层主要分布在西南、华南、华中及西北的广大地区。由于各地区红层的岩性、构造运动、气候条件和时间因素不同，红层中发育了多种地貌，如方山、丘陵、高原、丹霞地貌等。红层地貌与丹霞地貌应严格区分开来。     

试论《红楼梦》中宝黛爱情描写的意义

宝黛爱情的描写是贯穿《红搂梦》全书的中心故事，它在突破旧有的郎才女貌、一见钟情、才子佳人、怜才爱色的爱情模式的同时，向我们展现了全新的闪烁看朴素民主思想的爱情观。而这两位叛逆者的爱情由于为统治阶级所不容和家族势力的迫害，以及主人公自身所带有的人文知识分子的特性，导致了他们爱情的悲剧结局。这个爱情悲剧突破了以往夫贵妻荣的大团圆模式，它的悲剧力量将永远震撼人们的心灵。     

Living fluids

One of the major emerging fields of research of the beginning of this century concerns living fluids. By “living fluids”, we mean two major categories of complex fluids: (i) fluids which are essential to life, like blood, and (ii) active fluids made of particles that are able to propel themselves in the suspending fluid by converting a form of their energy into mechanical motion. Studies on active fluids have known a considerable interest since the last decade. Blood might be viewed as an old topic, but the progresses in experimental techniques, analytical concepts and numerics, have contributed nowadays to a dramatic renewal of the interest in this field, with a great potential towards understanding physical and mechanical factors in cardiovascular diseases. These fields have considerably strengthened interdisciplinary research. The series of reviews of this dossier focus on the tremendous recent progress achieved in research on living fluids both from the experimental and theoretical points of views. These reviews present also the major open issues, making of this dossier a unique guide for future research in these fields. This project grew up thanks to the international summer school that we organized on the topic “living fluids” at the IES (Institut dʼétudes scientifiques) of Cargèse (Corsica) in 2012.     

论红色资源在推进社会主义核心价值体系培育中的应用

红色资源承载着中国化的马克思主义、革命传统精神和共产主义伦理道德,具有思想意识的引领、政治方向的引导、精神价值的传承、道德品德的教化等作用。在利用红色资源推进社会主义核心价值体系培育中,要科学开发三种载体的红色资源、搭建三个培育平台、拓展三种培育途径。     

仕女瓷画与“红楼＂女子装饰

《红楼梦》是一部古典名著，随着它的出版，也出现了不少以此为题材的陶瓷作品。尤其红楼女子形象更是成为历代陶瓷艺术家们笔下不断的追求。这些仕女图纹装饰生动准确地反映了红楼女子形象的悲欢离合，一个个美妙绝伦的红楼仕女，一件件气韵鲜活的仕女瓷画，使《红楼梦》这部经典悲剧故事在陶瓷艺术世界中大放异彩、千古流传。     

人生悲剧的三重验证——兼及脂批对《红楼梦》悲剧主题的揭示

被王国维视为“悲剧中之悲剧”的《红楼梦》，寄寓了作者对人生命运的深刻追问和独特思考。借助小说文本与脂砚斋批语的互证，从三个层面对其所表现的人性悲剧进行理解，阐释个体价值的悲剧、爱情理想的悲剧、人生普遍的悲剧，并进而探求其悲剧思想于人性关怀和审美意义上的启示。     

禅解赤壁——从赤壁词赋中看苏轼的禅宗思想

＂乌台诗案＂后,仕途上一帆风顺的苏轼被贬黄州。精神的困顿,生活的贫穷,心灵的抑郁,使他转向了宗教,渴求在禅宗里安顿心灵,寻找人生的意义和价值。苏轼接受禅宗的＂明心见性＂,＂不立文字,见性成佛＂,＂五蕴皆空＂,＂心无所住＂,＂人生如梦＂等义理,并将它们与儒道两家融合一体,＂浩然不见其涯也＂。在黄州,在赤壁,苏轼用他的如椽之笔写下三篇赤壁词赋,深刻体现了他对禅宗的认知和体悟。