منابع مشابه
1855 On
Wallace, A. R. 1855. On the law which has regulated the introduction of new species.
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The Internet has raised student plagiarism to a new level. Never before has access to information been as easy, and never before have students had such a capacity to search, order, borrow, copy, cut and paste. This paper offers a critical perspective on current practices that deal with student plagiarism, while placing the issue into the context of current Internet culture. As cyber-plagiarism ...
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The free energies of activation for the aryl–aryl rotation of 17 biphenyl derivatives, bearing a heavy heteroatom (S, Se, Te, P, Si, Sn) as ortho substituent, have been measured by variable temperature NMR. These numbers, so called B values, represent a meaningful measure of the steric hindrance exerted by the selected substituents. DFT computations match quite satisfactorily the experimental b...
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Fast infrared mapping with sub-millimeter lateral resolution as well as time-resolved infrared studies of kinetic processes of functional organic thin films require a new generation of infrared ellipsometers. We present a novel laboratory-based infrared (IR) laser mapping ellipsometer, in which a laser is coupled to a variableangle rotating analyzer ellipsometer. Compared to conventional Fourie...
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En la historia de la medicina peruana podemos encontrar diversos ejemplos de destacados científicos, ilustres divulgadores de la ciencia, devotos practicantes de su arte, muchos de los cuales han recibido público reconocimiento por su obra científica. También encontramos aquellos que, paralelo a su ejercicio profesional, han tenido una activa vida ciudadana e intelectual, por lo cual también ha...
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ژورنال
عنوان ژورنال: BMJ
سال: 1982
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.285.6347.1014