Structural Description of Polyaromatic Nucleus in Residue

The proton nuclear magnetic resonance spectroscopy （1H-NMR）, the synchronous fluorescence spectrometry （SFS） and the ruthenium ions catalyzed oxidation （RICO） method were used to determine the chemical structure of polyaromatic nucleus in Oman residue fractions. The results of 1H-NMR analyses showed that the average numbers of aromatic rings in the aromatics, resins and asphaltenes units were 3.2, 5.6 and 8.2, respectively. SFS was used to investigate the distribution of aromatic rings in residue fractions, the main distribution range of aromatic rings in aromatics, resins and asphaltenes were 3 4 rings, 3--5 rings and more than 5 rings, respectively. The aromatic network in residue fractions was oxidized to produce numerous carboxylic acids. The types and content of benzenepolycarboxylic acids, such as phthalic acid, benzenetricarboxylic acids, benzenetetracarboxylic acids, benzenepentacarboxylic acid and benzenehexacarboxylic acid disclosed the condensed types of aromatic nuclei in the core. The biphenyl fraction （BIPH）, the cata-condensed fraction （CATA）, the peri-condensed fraction （PERI） and the condensed index （BCI） were calculated based on the benzenepolycarboxylic acids formed. The results implied that there was less biphenyl type structures in all residue fractions. The aromatics fraction was almost composed of the cata-condensed type system, and the asphaltenes fraction was wholly composed of the peri-condensed type system, while in the resins fraction co-existed the two types, herein the peri-con- densed type was predominant over the cata-condensed type. Based on the analytical results obtained in the study, the components --aromatics, resins and asphaltenes -- were given the likely structural models.     

荧光测定法监控水中溶解硬度用于工业水系统

发明领域 本发明应用于工业水系统，特别是可以用于工业水系统水中溶解硬度的监控。     

腐蚀速率测定法在研究测试电缆性能中应用

主要介绍利用腐蚀速率测定法分析测试电缆在井下测试过程中的前后性能变化，即是否被腐蚀、使韧性及耐拉伸力发生变化，初步确定测试电缆的可使用周期。此方法可初步确定测试电缆的性能，可广泛应用于油田相关领域中。     

高含油油料酸值试纸快速测定法的研究

利用混合指示剂、保护剂、碱液制成试纸,快速检测芝麻以及高含油油料酸值(含油量30％以上)。经多次验证表明,试纸法检测芝麻酸值方法简单、迅速、效果好,特别适合油料收购单位作现场测定。检测范围为1.0～20.0KOHmg/g油,有效范围为2.5～10.0KOHmg/g油。方法原理等同ZBX04013—86,对酸值检测准确性是以半定量为前提而设计制作的。     

微衍生及二次液离子串级质谱法测定不饱和脂肪醇的双键位置

微衍生及二次液离子串级质谱法测定不饱和脂肪醇的双键位置（日）ＴａｋｅｍｉｃｈｉＮａｋａｍｕｒａ等质谱法测定碳链中的双键位置一直是一大难题，难点之一在于不饱和脂肪族化合物双键的电解离子光谱的迁移常常被掩盖，一种解决办法是利用双键处的衍生作用。对含有多个...     

宁夏汉延渠灌区灌溉水利用系数测算分析与评价

农田灌溉水利用系数表示从水源引水被农作物吸收利用的过程,是反应灌区灌溉用水效率的一项指标。本文以汉延渠灌区为例,综合考虑宁夏的气候环境、土壤类型、灌溉制度及作物种植结构等因素,选取典型渠段和样点灌区,分别采用"连乘法"和"首尾法"计算宁夏汉延渠灌区2018—2019年的灌溉水利用系数,并对其进行对比分析评价,从而确定灌区适宜的计算方法。     

应用化学发光免疫分析法检测TSH、FT3、FT4

目的 考察化学发光免疫诊断试剂盒(Lumiassay~(R)促甲状腺素(TSH)、游离三碘甲腺原氨酸(FT3)、游离甲状腺素(FT4))在临床诊断甲状腺功能上的价值。方法 用Lumiassay~(R)试剂盒和Bayer ACS:180系统的同类试剂,同时测定415份临床标本以及试剂盒的各项技术指标。结果 化学发光试剂对甲亢的灵敏度分别为95.2％、96.4％和86.7％;对甲减的灵敏度分别为93.1％、85.1％和94.1％。对甲亢的特异度分别为99.1％、98.3％和99.1％;对甲减的特异度分别为99.6％、99.6％和99.6％。Lumiassay~(R)试剂结果与Bayer ACS:180系统的同类试剂的结果高度一致。结论 应用Lumiassay~(R)试剂临床诊断甲状腺功能是可行的。     

单向复合材料剪切参数简易测定法

本文把材料力学的反对称四点弯曲受力模式与Iosipescu剪切试验法相结合,提出了一种非常简单的复合材料剪切实验方案。对CF/PSF、GF/PSF单向复合材料测定结果表明,它们与已发表的实验和理论工作相比都符合较好。