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Diquat can be extracted with 1-butanol from high pH solution in the presence of several moderate reductants. The red colored reduced compound of diquat in water turns to a purple compound in 1-butanol. The absorption of the purple compound is 0.105 at 383 nm and 0.119 at 520 nm in 1 microgram diquat/ml 1-butanol. The latter value is a little higher than that of the red compound at 495 nm in water. The purple compound is much more stable than the red compound in water. More than 80% of 10 ppm diquat added can be extracted from serum, blood, tissues, urine and some drinks. The extraction with 1-butanol is useful for concentration of diquat contained in large volume. The lower limit of detection is 0.1 microgram/ml 1-butanol. Paraquat is insoluble in 1-butanol under the same condition. Therefore, this method is applicable for the determination of diquat when paraquat is also contained in the solution. 相似文献
203.
This paper explores the linkages between development, “appropriate” administrative technology and the training of development managers. In so doing, it traces the intimate relationships between development administration, conceptual paradigms and administrative know-how as a scientific and technological system. Orthodoxy, neo-orthodoxy and critical paradigms are discussed and a number of elements to reformulate a development administration paradigm are considered. Based upon this discussion the paper concludes with a tentative outline identifying training needs for development managers and a number of observations about such training: its “appropriatness”, professionalisation and the issue of international cooperation. 相似文献
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A simple and rapid method for isolation of five butyrophenones with Sep-Pak C18 cartridges from human samples, and their wide-bore capillary gas chromatography (GC), are presented. The GC was made by both flame ionization and electron capture detections. The drugs contained in alkaline samples were directly applied to the cartridges and eluted with chloroform/isopropanol (9:1). The recoveries with use of the cartridges were excellent for most drugs in both urine and plasma samples. We can recommend the Sep-Pak C18 cartridges for isolation of butyrophenones because of simplicity and rapidity, and also wide-bore capillary GC because of high sensitivity and low decomposition of drugs during passage through the column. 相似文献
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K. C. O. Shann 《Australian Journal of Public Administration》1978,37(3):274-284
Abstract: The Australian diplomatic service receives a fair degree of criticism, some misconceived, but some directed constructively at improving its economy and efficiency. The traditional objectives of Australian overseas representation are not questioned; rather the debate centres on the vast range of choice in the ways in which these broad objectives can be met—on such matters as how elaborately the task of overseas representation should be performed, where, and how large, overseas missions should be, how the diplomatic service should be staffed, and whether the pattern of coordination between the diplomatic service and other parts of the public service is appropriate. The complex issues involved in these areas of debate form part of the background against which the everyday work of the diplomatic service is set. This work includes political and economic reporting, the usual consular business, and “one-off” occasions ranging from the preparation of major bilateral treaties to war or revolution. Language and cultural differences make the carrying out of these tasks more difficult. Recruits to the diplomatic service are usually graduates in their mid-twenties with strong university qualifications, which are supplemented by formal training and by experience in different posts abroad and in Australia. The trend to greater specialization of diplomatic staff suggests a need for closer contact between the foreign service and other parts of the Australian Public Service, universities and the private sector. The past few years have been a period of questioning and criticism in all parts of the public sector, including the diplomatic service. At the same time the role played by the diplomatic service has grown more difficult. It is time that discussion focused on the key question—the need for comprehensive representation of Australia overseas—rather than on those who service this representation. 相似文献
208.
Detection and identification of six members of the nitrogenous hallucinogens (glycolates, benzilates and phenyl acetamides) using thin-layer and gas-liquid chromatography and mass spectrometry were attempted. The methods used are sensitive, valuable and applicable in routine forensic analyses. 相似文献
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