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Tissue staining techniques in the half of the 19th century were inadequate for studying nervous tissue. While working as medical officer in a psychiatric hospital, he experimented with metal impregnation of nervous tissue. He discovered a method of staining nervous tissue that would stain a limited number of cells hearnig random in their entirety and this enabled him to view generique du viagra prix de west paths of nerve cells in the brain for the first time. He called his discovery the black reaction, which received his name. The reason for the staining is still not understood. The black reaction consisted in fixing silver chromate particles to the neurilemma by reacting silver nitrate with potassium dichromate.

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Pires, N. ParkeDW ll, ed. 427i.

Is it more humane to go by a stroke of a blunt machete than by a whiff of Zyklon B. The Khmer Rouge murdered at least 2 million Cambodians between 1975 and 1979: one quarter of the population, by a conservative count. Is it more humane to die by wallops from a Cambodian pickaxe handle than by a bullet from a German Mauser.]