osteoclasts
发表于 2025-3-23 12:23:43
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Condense
发表于 2025-3-23 15:56:58
The State of Ammonia Synthesis at the Turn of the Twentieth Century: The Arena for DiscoveryWhen Fritz Haber took up the problem of ammonia synthesis in 1903 there were several methods of obtaining fixed nitrogen, both naturally and through synthesis in chemical reactions. The main natural sources were Chile saltpeter (sodium nitrate from South America) and ammonium sulfate from gas works and coking (and still some guano).
Regurgitation
发表于 2025-3-23 20:01:43
TerminologyIn Parts I and ., the scientific breakthrough of ammonia synthesis was described in terms of a confluence of factors leading to an arena of research mature enough for advancement—it is a dynamic encapsulated in the concept of ..
仔细阅读
发表于 2025-3-24 00:25:29
Normal ScienceThe starting point for the discussion of scientific discovery is Kuhn’s distinction between “normal science,” in which routine research is performed and the moments of crisis which can lead to paradigm shifts.
DRAFT
发表于 2025-3-24 05:17:14
r many years. The unique appeal of this hypothesis to cellular immunologists came from the observation of continuous and systematic rejection of altered body cells by cytotoxic T lymphocytes. Soon apparent, however, was the disconcerting observation that congenitally immunodeficient athymic nude mic
白杨鱼
发表于 2025-3-24 06:47:03
is fact is appreciated even by people in the most primitive of civilisations and prompts them to ask the basic question: ‘Why did I develop this disease‘? The astute clinician goes beyond establishing a diagnosis and asks similar questions of himself and his patient. Frequently a singular observatio
可忽略
发表于 2025-3-24 13:46:14
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Regurgitation
发表于 2025-3-24 17:21:09
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宽度
发表于 2025-3-24 21:20:06
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浮雕宝石
发表于 2025-3-24 23:58:30
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