对鸡根的红外傅立叶光谱研究

本文首次采用傅立叶变换红外光谱法，直接、快速、准确地测定彝药鸡根的红外光谱。研究表明：彝药鸡根的不同部位，其红外光谱不同，它们的红外光谱的吸收位置和强度均有明显差异。根据红外特征吸收能够得到鸡根的红外光谱图，从而达到对彝药在分子水平上的研究。该方法具有直接、快速、准确，不破坏样品的原性质；重现性好，仪器相对便宜，方法易掌握，普适性强；可数字化，更具科学性和便于管理；更符合中医中药的医治原则和研究。     

Identification of white efflorescence on wooden African objects

This article describes the investigation of white efflorescence on eight wooden African objects from Malawi and Zambia and the treatment of the objects to remove the deposits. The source of the efflorescence on these objects was determined to be the heartwood from which they were carved. Using gas chromatography-mass spectrometry and Fourier transform infrared spectrometry, the crystalline efflorescence was found to consist of homopterocarpin and pterocarpin, two isoflavonoid compounds found in woods and shrubs belonging to the genus Pterocarpus, and African Baphida nitida. The crystal growth appeared to be heaviest on areas of the objects that were more deeply carved as well as on those objects without a surface finish. The storage conditions of the collection were studied and found to have likely accelerated the rate and extent of the natural movement of the pterocarpan compounds from the interior of the heartwood to the outer surfaces.     

基于蓝牙的智能家庭网关设计与实现

家庭网关是整个智能家庭网路的核心,文章以ARM920T内核的微处理器AT91RM9200作为硬件平台,结合无线蓝牙通信技术,移植嵌入式操作系统μClinux,构建了一个完整的家庭网关的软硬件软件平台,实现了通过PSTN网对家用电器的远程控制。     

PEN合成研究Ⅰ:NDCA与EG酯化反应工艺

初步探讨了2，6-萘二甲酸(NDCA)与乙二醇(EG)酯化反应合成2，6-萘二甲酸乙二醇酯的工艺因素。筛选出钨酸钠作催化剂较合适，其用量为2％(g/gNDCA)，反应温度为215℃，EG与NDCA摩尔配比为3，反应时间为4h。对NDCA与EG酯化反应产物进行红外光谱分析、核磁共振分析，确定反应产物是目标产物。     

Investigation of the materials found in the studio of Francis Bacon (1909–1992)

Abstract

The investigation of materials found in Bacon's studio is reported. The contents of the studio are examined and interpreted to identify the materials and colours most favoured by Bacon, and the range of media used. A small number of colours appear to have been heavily used. Some objects used as tools in the painting process are also investigated and explain textures seen in paint in his works. Samples of selected materials from the studio are analysed to identify the components of paints (pigments, extenders, and binders) used by Bacon. This investigation is part of a wider project examining his materials and techniques. The analytical information obtained here from the studio helps to clarify the statements made by Bacon in interviews regarding his use of materials and is proving useful in the identification of materials in his paintings, in order to help with the conservation and authentication of his works.     

原位红外光谱法研究新型氰酸酯和双马来酰亚胺树脂的固化机理

采用原位红外光谱法研究了新型含萘环氰酸酯2,7-二氰酸酯基萘(DNCY)和双马来酰亚胺2,7-二(4-马来酰亚胺)苯醚基萘(BMPN)树脂的固化机理。发现,氰酸酯体系所发生的固化反应都以氰基通过环化反应生成三嗪环为其特征,催化剂的加入对氰酸酯体系的固化机理并没有影响;在氰酸酯和双马来酰亚胺(DNCY/BMPN)共固化体系中,主要是以BMPN/DNCY发生共聚反应生成两种六元环结构的共聚物为主,兼有少量BMPN单体自聚。     

正交试验法研究生姜油树脂的提取工艺

用正交试验法探索以乙酸乙酯提取生姜油树脂的最佳工艺条件，并对产品质量进行考核．用FTIR光谱仪鉴别成分．结果表明料剂比(g／mL)为20：100、室温浸泡2d时，提取率最高，FTIR光谱图中含有3436．56cm^-1、2929．62cm^-1、2840cm^-1、1710．89cm^-1、1516．3lcm^-1、1260．27cm^-1、1029．84cm^-1等的特征吸收峰，产品符合FCC(1981)的要求。     

缅甸还原性次生化翡翠的傅立叶变换红外光谱分析

傅立叶变换红外光谱分析表明，原生翡翠与还原性次生化翡翠在3800-3000cm^-1范围内，具有不同的红外吸收图谱标型特征，原生翡翠出现右倾斜的“V”字形吸收曲线，峰谷尖锐，吸收率低；还原性次生化翡翠出现“U”字形吸收曲线，峰谷宽阔，吸收率较高。其原因可能与还原性次生化翡翠的微裂隙中穿插充填有绿泥石等含水的粘土类矿物，使其红外光谱在3800-3400cm^-1区段叠加有粘土矿物中水和羟基的吸收峰有关。     

Organic residue analysis of Egyptian votive mummies and their research potential

Vast numbers of votive mummies were produced in Egypt during the Late Pharaonic, Ptolemaic, and Roman periods. Although millions remain in situ, many were removed and have ultimately entered museum collections around the world. There they have often languished as uncomfortable reminders of antiquarian practices with little information available to enhance their value as artefacts worthy of conservation or display. A multi-disciplinary research project, based at the University of Manchester, is currently redressing these issues. One recent aspect of this work has been the characterization of natural products employed in the mummification of votive bundles. Using gas chromatography–mass spectrometry and the well-established biomarker approach, analysis of 24 samples from 17 mummy bundles has demonstrated the presence of oils/fats, natural waxes, petroleum products, resinous exudates, and essential oils. These results confirm the range of organic materials employed in embalming and augment our understanding of the treatment of votives. In this first systematic initiative of its kind, initial findings point to possible trends in body treatment practices in relation to chronology, geography, and changes in ideology which will be investigated as the study progresses. Detailed knowledge of the substances used on individual bundles has also served to enhance their value as display items and aid in their conservation.