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

By Erwin Bunning, Hermut Wilhelm Pfeffer

This biography examines the lifestyles and paintings of Wilhelm Pfeffer (1845-1920), a pioneer of recent experimental biology who expected a lot during this box that's now taken without any consideration. The publication indicates Pfeffer as a instructor and author with huge study pursuits, incisive experimental abilities, and a questing brain. Dr H.Wilhelm Pfeffer, grandson of Wilhelm Pfeffer, offers the interpretation for this English variation.

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

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The results confirmed what Pfeffer had expected, and they agreed with his earlier analysis of data developed in 1888. 33 The whole question of the sensitivity of lower organisms was ignored for a long time after the early studies in Pfeffer's laboratory. ) has there been a renewed, successful investigation of the subject. 34 The new work examined in greater detail the faculty 51 Ahead of His Time: Wilhelm Pfeffer of discrimination in bacteria; at the same time, it showed that Pfeffer was correct when he wrote in reference to reception [term now used for perception] that there can be little doubt that the plasma membrane is involved in the process (1893d).

It is unbelievable that intensive research in permeability continued for more than fifty years after Pfeffer's Osmotic Investigations, and no heed was paid to his warning that a membrane should not simply be thought of as a sieve. He wrote: However, Traube was essentially wrong in his theoretical explanation of the actual diosmotic process. When he neglected the molecular forces that are active between the membrane on the one hand, and the solute and the solvent medium on the other hand, this scientist formed the incorrect view that the membrane simply acts as a sieve.

22 Recent studies give some interesting new leads. The basic flows of ions in plants have been analysed, and the results show a certain parallel with the results of the studies on the effect of stimuli in animal cells. This would seem to support the objections against Pfeffer's idea about a difference between plant movements and the movements of muscles. However, the modern ion flow studies deal with a different dimension than the one Pfeffer dealt with in his studies of molecular-sized plasma membranes.

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