Characterization of sacha inchi (<Emphasis Type="Italic">Plukenetia volubilis</Emphasis> L.) oil by FTIR spectroscopy and <Superscript>1</Superscript>H NMR. Comparison with linseed oil

Three oil samples obtained from sacha inchi (Plukenetia volubilis L.) seeds were studied by means of FTIR and ¹H NMR. Frequency data of the most significant bands of the IR spectrum of this oil are given. These data show that sacha inchi oil has a high degree of unsaturation. The same fact is deduced from the ratio between the absorbance of the bands due to the stretching vibrations of the cis olefinic CH double bonds at 3010.5 cm⁻¹ and to the methylene symmetrical stretching vibrations at 2855.1 cm⁻¹. The proportions of monounsaturated, polyunsaturated, and saturated acyl groups were predicted from the frequency of some IR bands, and these were in satisfactory agreement with the values obtained through FAME generation and their quantification by GC. Likewise, simple observation of the ¹H NMR spectra provided a great deal of information about sacha inchi oil, with regard not only to the relative proportions of the different acyl groups but also to their nature. Thus, the presence of γ-linolenic acyl groups was discounted. Furthermore, the area of some ¹H NMR signals was used to determine the proportion of saturated and mono-, di-, and triunsaturated acyl groups, which also were in satisfactory agreement with the values obtained by classical methods. IR and ¹H NMR determinations take very little time in comparison with classical methods and do not require chemical manipulation or transformation of the sample. A comparison was also made between the compositions of sacha inchi and linseed oil. Both oils are important sources of the healthful n−3 linolenic acyl groups, and sacha inchi also contains high proportions of the n−6 linoleic acyl groups.     

Use of IR Spectroscopy, X-Ray Diffraction, and Petrographic Analysis to Evaluate Structural Changes in Aluminophosphate Compositions at Creeping

The present study is an attempt to evaluate the structural changes observed in ceramic compositions based on aluminum oxide and phosphate H₃PO₄binders at creeping using IR spectroscopy, X-ray diffraction, and pectrographic analysis. The study reports the dependence of structural changes on the composition of the compounds, the type of phosphate binder, the temperature of processing, and the test conditions at creeping. On the basis of the test results and the data obtained elsewhere [1–7], it is surmised that the deformation process of phosphate compositions at high temperatures and loads is connected with a change in the physicochemical characteristics of the material and, as a consequence, with a change in its structure. It is revealed that the mechanism of deformation of aluminophosphate material at creeping depends primarily on the change in the matrix structure that cements the grains of electrocorundum in the material.     

RSD requirement for different sample size for blend sampling

A formula for calculating the equivalent relative standard deviation (RSD) for different sample sizes other than the Office of Generic Drugs (OGD) draft guidance was derived. These critical values vary with the population RSD and the sample size and guarantee the same confidence of passing a batch similar to the OGD blend uniformity test. Simulation results showed that the normal approximations give very close results to the simulation results. An assessment of the proposed OGD blend uniformity criteria against the first-stage USP content uniformity (CU) criteria for tablets was also made.     

二次形局部组成混合规则及在M-H81状态方程中的应用

首先在二次形混合规则基础上引入局部组成概念,提出了二次形局部组成混合规则。同时通过推导方阱势ＰＹ积分方程的径向分布函数近似解析表达式,建立了新的局部组成模型,并将新的局部组成模型与二次形局部组成混合规则用于马丁－侯８１状态方程进行汽液平衡计算。结果表明,二次形局部组成混合规则优于温函数混合规则,对于丙酮－水、乙醇－水、甲醇－水及苯－丙醇体系计算气相组成与压力精度均有明显提高。     

基于WSRM协议的WEB服务动态管理模型设计

本文主要设计了一种基于WSRM协议的WEB服务动态管理模型。首先。通过详细分析WEB服务复合及管理的形成原因和特性，并结合现有的分布应用管理模型和技术，提出并构建一种适于WEB服务管理的分布应用管理协议一WSRM协议。接着，在WSRM协议的基础上，我们构建了一种通用的，功能较全面的WEB服务动态管理模型。该管理模型能够实现对WEB服务进行动态的，全面的性能监视和管理，并且在构建该管理模型中，通过使用WSRM协议，该管理模型能够适应WEB服务复合的异构性、自治性和动态性，并具有良好的可靠性和扩展性。     

S-136高级镜面塑料模具钢实物质量剖析

通过对我厂试制的S-136镜面塑料模具钢性能和组织与日本生产的模具钢实物对比研究，说明我厂生产的模具钢化学成分，钢材纯洁度，试样淬回火显微组织与日本材料处于相当水平。但在实验室同样热处理条件下，我厂试样冲击韧性只需稍加改善便可。     

冶金石灰化学成分的理论推算及应用研究

通过对冶金石灰煅烧机理的分析，总结出了根据石灰石原料的化学成分推算冶金石灰化学成分的两个公式，对其应用范围加以分析，并在分析实验室检验结果和工业生产实践中得以应用。公式对冶金石灰生产实践有一定指导意义和使用价值。     

语义Web服务的自动化组合方法：研究综述

语义Web服务的提出是为了解决Web服务资源在语义Web中的智能化整合问题,而语义Web服务的自动化组合技术作为这个整合过程中的一个关键技术正在蓬勃发展。本文考察了来自人工智能领域、形式化方法和自动推理等领域的众多服务组合方案,讨论了各种方法的原理和优劣之处,并探索了将来的研究工作和趋势。     

心电诊断模糊专家系统开发与研究

以领域专家的理论知识和经验知识为基础,采用了模糊推理,建立了心电诊断模糊专家系统的模型,克服了知识工程师对规则难以总结提取的困难,讨论了趋于增长的合成推理规则(CRI)方法,最后给出了实验结果。     

防止炼锌电炉炉底积铁的生产实践

叙述了炼锌电炉炉底积铁形成的机理,探讨了炉料成分、炉温、电极插入深度、渣型、还原剂配比等因素对积铁形成的影响,介绍了防止积铁产生的措施。