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Frases de Erwin Chargaff

Erwin Chargaff foi um bioquímico austríaco emigrado para os Estados Unidos durante o período nazista.

Através de cuidadosa experimentação, Chargaff descobriu duas regras que ajudaram a levar à descoberta da estrutura de dupla hélice do ADN. Chargaff e colaboradores buscaram quantificar cada um dos tipos de base nirogenada do DNA de várias espécies. Para isso utilizaram métodos de cromatografia.

Os resultados que Chargaff e sua equipe conseguiram, levaram a importantes conclusões sobre a composição de bases nitrogenadas do DNA. Foi verificado que:

1 – Essa composição variava de uma espécie pra outra, mas que era constante dentro da mesma espécie.

2 – Em qualquer DNA, de qualquer espécie, a percentagem da base timina era sempre igual a da base adenina, e a percentagem da base citosina era igual a da base guanina. Wikipedia  

✵ 11. Agosto 1905 – 20. Junho 2002
Erwin Chargaff: 6   citações 0   Curtidas

Erwin Chargaff: Frases em inglês

“Now one could say, at the risk of some superficiality, that there exist principally two types of scientists. The ones, and they are rare, wish to understand the world, to know nature; the others, far more frequent, wish to explain it. The first are searching for truth, often with knowledge that they will not attain it; the second strive for plausibility, for the achievement of an intellectually consistent, and hence successful, view of the world.”

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Erwin Chargaff

Heraclitean Fire: Sketches from a Life Before Nature, Paul & Co Pub Consortium, June, 1978.

“What I see coming is a gigantic slaughterhouse, a molecular Auschwitz, in which valuable enzymes, hormones, and so on will be extracted instead of gold teeth.”

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Erwin Chargaff

The Genetic Revolution—Great Promise With Growing Concern, Awake! magazine, July 22, 1989.

“In 1945, therefore, I proved a sentimental fool; and Mr. Truman could safely have classified me among the whimpering idiots he did not wish admitted to the presidential office. For I felt that no man has the right to decree so much suffering, and that science, in providing and sharpening the knife and in upholding the ram, had incurred a guilt of which it will never get rid. It was at that time that the nexus between science and murder became clear to me. For several years after the somber event, between 1947 and 1952, I tried desperately to find a position in what then appeared to me as a bucolic Switzerland,—but I had no success.”

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Erwin Chargaff

Erwin Chargaff, Heraclitean Fire: Sketches from a Life before Nature (1978), 4.

“We do not know what life is, and yet we manipulate it as if it were an inorganic salt solution…”

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Erwin Chargaff

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“Outside his own ever-narrowing field of specialization, a scientist is a layman. What members of an academy of science have in common is a certain form of semiparasitic living.”

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Erwin Chargaff

Perspectives in Biology and Medicine (1973)