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Otto Völker 《Die Naturwissenschaften》1954,41(17):405-405
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Josef Riederer 《Die Naturwissenschaften》1978,65(5):217-222
The preservation of historical works of artistic and cultural significance that are made of paper, wood, textiles, ivory, amber, and similar organic materials is difficult because of their rapid deterioration due to the action of light, humidity, temperature variation, or attack by fungi and insects. Based on the application of synthetic products, new techniques for the preservation of these materials have been developed in the last few years, which contribute to permanent protection. 相似文献
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Wolfgang Wild 《Die Naturwissenschaften》1985,72(7):358-364
The harmony of research, general education and professional training, which was an essential element of the classical German university, has been deeply disturbed by the enormous increase of student numbers. We discuss, whether the demands for a transfer of technology and for a training of an elite of specialists can be combined with the task of a helpful education for the majority of our students. As an example for a flexible solution we present the program of summer-schools ("Ferienakademieprogramm") of the Technical University of Munich. 相似文献
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