Download PDF by Erwin Bunning, Hermut Wilhelm Pfeffer: Ahead of His Time: Wilhelm Pfeffer, Early Advances in Plant

By Erwin Bunning, Hermut Wilhelm Pfeffer

ISBN-10: 0886291038

ISBN-13: 9780886291037

This biography examines the existence and paintings of Wilhelm Pfeffer (1845-1920), a pioneer of contemporary experimental biology who expected a lot during this box that's now taken with no consideration. The publication exhibits Pfeffer as a instructor and author with vast study pursuits, incisive experimental abilities, and a questing brain. Dr H.Wilhelm Pfeffer, grandson of Wilhelm Pfeffer, presents the interpretation for this English version.

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Extra resources for Ahead of His Time: Wilhelm Pfeffer, Early Advances in Plant Biology

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Fig. 2 Extract from a letter of June 19,1885 written by Pfeffer to the President of the University of Tubingen concerning the building of a greenhouse (the scientific purpose and the aesthetic considerations are pointed out). — Archives, University of Tubingen. 23 Ahead of His Time: Wilhelm Pfeffer letters in the archives of the University of Tubingen testify to this. Here is just one example. Several new, beautiful and relatively large greenhouses were erected during Pfeffer's term of office. This came as a surprise to those who thought of him as a one-sided plant physiologist — a laboratory botanist who supposedly scorned other fields of botany.

Overton concluded that lipids were present in the plasma membrane, and later research proved that this was so. Like Pfeffer, Overton did not believe that the plasma membrane was simply a Oelhaut [skin of oil] or lipid film. In its original form, the lipid theory of permeability as it related to the penetration of substances into the cell was too one-sided. Pfeffer was of the opinion that more detailed studies would "certainly" show that many substances which are insoluble or only slightly soluble in fatty matter would easily enter the cell.

In the 1930s, P. R. Collander especially was involved in showing that plasma plays an active role after all. He also noted the adenoidal (glandular) activity of the protoplasm, a feature previously postulated by Overton. 27 Decisive progress was not made until the advent of modern membrane biology. The discovery of enzymes and the discovery of carrier molecules within the membrane are two examples. This confirmed what Pfeffer already had suggested as a possibility. 88). The ground lost after Pfeffer was so extensive that scientists in recent times were left with ideas such as those expressed in 1973 by D.

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Ahead of His Time: Wilhelm Pfeffer, Early Advances in Plant Biology by Erwin Bunning, Hermut Wilhelm Pfeffer

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