2-（4-甲氧羰基苯基）-5-氨基-6-羟基苯并嚼唑的热分解机理及动力学

采用热重法（TG）测定了2-（4-甲氧羰基苯基）-5-氨基-6-羟基苯并嗯唑（MAB）的热分解过程,测定了MAB及其在热分解过程中不同阶段产物的红外光谱,运用量子化学GAMESS软件计算了MAB分子的键级,推断了MAB的热分解机理,结果表明MAB的热分解过程是一个五阶段过程,起始步骤是甲基酯的分解、根据不同升温速率下的热重曲线计算得到MAB第一阶段热分解反应的表观活化能Eα=157．1kJ·mol^-1和指前因子A=3．715×10^13。     

“嗯啊”的语用功能分析

"嗯"作为应答语,无论在日常口语还是网络会话中都很常见;与此同时,特别在网络会话中也常常有使用另一应答语词"嗯啊"的情况。通过与"嗯"对比并排除语境造成的影响,着眼于二者在表应答时仍存在的一些细微差异,从语用学的角度对"嗯啊"语用表义的积极性和消极模糊性两方面进行分析,并探讨其产生机制。     

凉山彝族唱丧仪式探赜——以四川凉山州宁南县六铁彝区为例

本文以四川凉山州宁南县六铁彝区为调查对象,对彝族＂策格＂、＂瓦之勒＂、＂阿古荷＂、＂丛嗯＂几种唱丧仪式进行了展示性的认知,并反思和观察了一种敬畏祖先、尊重生命的文化姿态以及＂祖先崇拜＂的彝族信仰观念.     

用同位素稀释的气相色谱／高分辨质谱联用测定中国珠江流域鱼体中氯化二苯并二嗯英和氧化二苯并呋喃

Objective：PCDD/Fs level in 22 fish samples was investigated in Pearl river Delta area in order that the PCDD/Fs pollution level in common fish can be evaluated. Methods： Dibenzo-p-Dioxins and Dibenzo-Furans was extracted from the sample by Soxhlet extraction, concentrated then purified by column chromatography, carbon column enrichment,. Confirmation and quantitative analysis at ppt（pg/g） level of PCDD/Fs was performed by HRGC/HRMS using multiple ion detection mode（MID）. Certified reference material using Proficiency test sample fish muscle test material 0613 that was obtained from Central Science Laboratory（CSL） in Britain. Results： The average of concentration in wet weight is 1.261 ng/kg,, the average total WHO-TEQ for 22 samples is 0.246ng/kg wet weight. Generally, OCDD, 2,3,7,8-TCDF, 1,2,3,4,6,7,8-HpCDD was the main contributors to the total 17 PCDD/Fs detected, average account for 21%,16%,14%, respectively. While 1,2,3,7,8-PeCDD, 2,3,4,7,8-PeCDF, 2,3,7,8-TCDD were main contributors to the total WHO-TEQ, account for 40%,27%, 13% respectively. The total TEQ for 22 fishes ranged from 0.03 ng/kg wet weight to 0.878 ng/kg wet weight. Conclusions： PCDD/Fs level was largely different from sample to sample depending on the sample kinds. The level in the Pearl river Delta area fish samples is not distinct comparing with other countries, but some kind fish level should be paid more attention on it since its higher level. The relationship between source of PCDD/Fs and PCDD/Fs level in fish will be studied deeply in the future.     

湘语新邵方言的“在咯里、在嗯里”

湘新邵语方言中的的“在咯里/嗯里”一词,在表达“进行”义的同时,隐含有“持续”义.该词既可以作状语位于句中,也可以位于句末.不同的位置所能搭配的动词及其结构不同.“在咯里/嗯里+V(O)n与“V倒(O)+在咯里/嗯里”的区别在于是否具有可间断性、可完结性及是动态性还是静态性.     

苯并□唑类化合物的应用

苯并嗯唑类化合物作为一种重要的有机合成中间体具有广泛的应婀。文献针对这类化合物的系统合成方法也报道较少．因为我们发现合成不同的苯并噁唑衍生物所需条件、方法都不相同;而且采用。幂同催化剂的产率也相差很多。因此本文通过制定不同的苯并唣唑衍生物的合成路线,来探讨在不同路线。催化剂以及反应条件下的产率,以探索出这类化合物的最适宜合成方法及条件。实验结果表明,在我们的实验体系中,采用多聚磷酸（ppA）在合成2-取代苯并嗯唑的反应中是一种很好的催化剂。     

洞口赣方言否定副词研究

本文从句法、语义、语用三个方面分析了赣方言使用频率最高的两个否定副词:"冇"和"嗯"。"冇"作为使用范围最广的否定副词,既能否定事物的性质,也能否定事物动态的转变过程,还能构成"V-冇-VO"正反问句以及正反问句的特殊形式"有冇有……";"嗯"作为洞口赣方言特有的否定副词,能构成三种可能式的否定形式:"V嗯C""V嗯得""嗯得C",三种结构的句法、语义、语用特征也各有差异。