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相关概念视频

History of Microbiology01:28

History of Microbiology

Microbiology, a scientific field dedicated to the study of microorganisms, has undergone profound development since its inception in the 17th century. Its history is marked by key discoveries and technological advancements that have shaped our understanding of life at the microscopic level and transformed medicine, agriculture, and industry.Early Foundations of MicrobiologyThe early foundations of microbiology were built on groundbreaking observations and the development of pioneering...
The Scientific Method03:50

The Scientific Method

Chemistry is an empirical science. Scientists often pose questions to understand the chemistry in everyday life and seek answers to these questions. To achieve this, scientists follow a definitive series of steps that together make up the Scientific Method. This approach involves making observations, asking questions, building a hypothesis, conducting experiments, analyzing results, and forming a conclusion.
The Scientific Method01:32

The Scientific Method

The scientific method is a detailed, empirical problem-solving process used by biologists and other scientists. This iterative approach involves formulating a question based on observation, developing a testable potential explanation for the observation (called a hypothesis), making and testing predictions based on the hypothesis, and using the findings to create new hypotheses and predictions.Generally, predictions are tested using carefully-designed experiments. Based on the outcome of these...
The Scientific Method02:40

The Scientific Method

Research is what makes the difference between facts and opinions. Facts are observable realities, and opinions are personal judgments, conclusions, or attitudes that may or may not be accurate. In the scientific community, facts can be established only using evidence collected through empirical research.
Scientific Laws and Theories02:31

Scientific Laws and Theories

Scientific Laws
Emission Spectra02:39

Emission Spectra

When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.

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相关实验视频

Updated: Jul 11, 2026

Blood Collection from the American Horseshoe Crab, Limulus Polyphemus
12:48

Blood Collection from the American Horseshoe Crab, Limulus Polyphemus

Published on: October 13, 2008

美国的科学,大约1880年

D J Kevles, J L Sturchio, P T Carroll

    Science (New York, N.Y.)
    |July 4, 1980
    PubMed
    概括

    19世纪后期的美国科学,特别是地球和生命科学,显示出了显著的活力. 这项研究得到了自然资源,宗教和社会动机以及政府赞助的支持,挑战了以前的观点.

    科学领域:

    • 科学的历史科学的历史.
    • 美国科学科学美国科学
    • 19世纪的科学 19世纪的科学

    背景情况:

    • 从历史上看,19世纪末的美国科学被认为是不发达的,专注于物理等纯科学.
    • 这种观点忽视了更广泛的科学景观,特别是在地球和生命科学领域.

    研究的目的:

    • 重新评估19世纪后期美国科学研究的活力和范围.
    • 识别在这一时期为科学进步做出贡献的各种因素.
    • 挑战传统的美国科学叙事作为一个智力落后的水域.

    主要方法:

    • 19世纪后期对科学研究及其支持系统的历史分析.
    • 审查机构支持,资金来源和科学努力的激励因素.
    • 重新解释关于美国科学现有的历史假设.

    主要成果:

    • 美国的科学研究表现出相当大的活力,特别是在地球和生命科学领域.
    • 主要驱动因素包括大陆的自然资源,宗教冲动,社会改革主义和实用性.
    • 与一些假设相反,联邦政府作为科学的赞助者发挥了重要作用.

    结论:

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    A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters (Homarus americanus)
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    A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters (Homarus americanus)

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    Published on: October 13, 2008

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    A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters (Homarus americanus)

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  • 19世纪后期的美国科学以制度支持和动机的多元主义为特征.
  • 这种多元主义,涵盖了各种领域和资金来源,代表了科学企业的历史上正常模式.