Ashing and microwave digestion of aerosol samples with a polypropylene fibrous filter matrix

Radionuclide monitoring is one of the key techniques required by the International Monitoring System (IMS) and On-Site Inspection (OSI) in the Comprehensive Nuclear Test Ban Treaty (CTBT). There shall be a global network of 80 radionuclide monitoring stations. Atmospheric aerosols are collected generally on filters in the stations. A polypropylene (PP) fibrous filter is often used in sampling atmospheric aerosols. There might be much information to be obtained by measuring aerosol samples after digestion rather than nondestructive analysis directly by γ-spectrometry. The present work focused on pretreatment of the filter samples, which includes the influence of different ashing or microwave digestion conditions on the recoveries of analytes. The inductively coupled plasma-atomic emission spectrometric detection results indicated that the recoveries of elements in the PP fibrous filters by ashing were influenced by ashing time, temperature and the properties of the elements. High recoveries of volatile elements and consistent recovery for other elements were obtained by using a closed microwave system to digest the filters. Higher sensitivity was also obtained when the intercomparison sample was measured by a HPGe well detector after pretreatment by the recommended ashing and microwave digestion procedures.     

顾太清题咏女性诗词集作品探析

顾太清题咏女性诗词集的作品,除了社交应酬的功能之外,亦肯定女性的才华,钩掘个人的特色,流露出对才女的同情和理解。知己意识的突显,加强了惺惺相惜的姊妹情谊,形成酬唱往来的女性文学社群。     

《古论》《齐论》与《鲁论》考述

汉初，《论语》出现了不同的传本。最著名的就是《古论语》、《齐论语》和《鲁论语》。三《论》在出现的先后次序上是《齐论》、《鲁论》的出现要晚于《古论》。在内容、篇次、文字的异同上：《鲁论》与《古论》除篇次不同外。篇目、内容大体相同；《齐论》比《鲁论》和《古论》多“问王”、“知道”二篇，其他20篇中“细章文句”也多于《鲁论》和《古论》；在都有的20篇中，《齐论》、《鲁论》的篇次相同。在源流上，三《论》同源而异流。     

Design of optical polarization splitters in a single-section deeply etched MMI waveguide

The design of a single-section polarization splitter in a deeply etched semiconductor MMI waveguide is presented. Numerically simulated results indicate that the semiconductor MMI exhibits considerable polarization dependence and, utilizing this effect, a compact 1.6-mm-long polarization splitter may be fabricated to yield more than 8-dB polarization separation and only 0.11-dB optical loss, using a very simple design-approach. Received: 16 May 2001 / Revised version: 14 August 2001 / Published online: 2 November 2001     

THE ESTABLISHMENT PROCESS OF INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHANICS

本文依据历史资料,简述了国际理论与应用力学联合会(International Union of Theoretical and Applied Mechanics,IUTAM)的建立过程,以及中国力学学会 (Chinese Society of Theoretical and Applied Mechanics,CSTAM) 1980年加入国际理论与应用力学联合会的一些情况,供大家研究力学史时参考。     

辜鸿铭《论语》译本“杂合”特征解读

以后殖民主义理论中的"杂合"概念解读辜鸿铭的《论语》译本,指出辜鸿铭的译本体现了一种杂合特征,展示了他在特定历史语境中抵制西方文化中心主义,构建中国文化与西方文化间平等对话的良苦用心。     

顾随年谱(下)

顾随先生是现代著名词人、教授和学者。先生词融会古今,自成一格;小说、诗歌创作也有一定的成就;执教40年,桃李满天下;在中国古代词学理论、诗学理论、戏剧研究、禅学等方面都取得了丰硕的成果。     

论顾况的题画诗

通观顾况的诗歌创作,他的题画诗艺术成就极高,想象丰富浪漫,风格奇特怪异,语言通俗易懂、生动活泼,充分体现出他独特的艺术感受力和欣赏力,颇具有“盛唐风骨”。     

论三峡地区板楯蛮的赋税缴纳与社会动荡

板楯蛮原是三峡地区一个古老的土著民族，其族名有三：或板楯蛮、或蜜、或白虎复夷。该民族因多种原因或迁徙北方、或南移湘西、或滞留三峡地区。在先秦至西汉时期，板楯蛮因屡建战功，朝廷对之轻徭薄赋；秦惠王时，因“白虎为害”事件，导致巴人内部的分裂；东汉至魏晋六朝，因朝廷加重赋税，又导致板楯蛮无数次“反叛”朝廷，最终使板楯蛮地区社会动荡，生产停滞，经济萧条，人民流徙甚至死亡。     

论女性在封建和谐家庭建设中的角色要求——读班昭《女诫》再思考

班昭的《女诫》作为第一部女性教育要籍,它确定了女性的家庭地位,强调夫妻关系是家庭人际关系的主体,要求女性在封建家庭中构建和谐人际关系必须做到：精心事夫、曲从舅姑、团结叔妹,并论述了女性应该遵循的道德修养和要遵守的行为规范。《女诫》是封建社会特定历史条件下的产物,重读《女诫》,扬其精华,弃其糟粕,对于构建现代和谐家庭有一定的借鉴作用。