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相关概念视频

Mass and Weight01:19

Mass and Weight

Mass and weight are often used interchangeably in everyday conversation. For example,  medical records often show our weight in kilograms, but never in the correct units of newtons. In physics, however, there is an important distinction. Weight is the pull of the Earth on an object. It depends on the distance from the center of the Earth. Weight dramatically varies if we leave the Earth's surface, unlike mass, which does not vary with location. On the Moon, for example, the acceleration due to...
Weightlessness01:01

Weightlessness

When an object is dropped, it accelerates toward the center of the Earth. If the net external force on the object is its weight, it is said to be in free fall; that is, the only force acting on the object is gravity. Galileo was instrumental in showing that, in the absence of air resistance, all objects fall with the same acceleration g. However, when objects on the Earth fall downward, they are never truly in free fall, because there is always some upward resistance force from the air acting...
Rocket Propulsion in Gravitational Field - II01:03

Rocket Propulsion in Gravitational Field - II

A rocket's velocity in the presence of a gravitational field is decreased by the amount of force exerted by Earth's gravitational field, which opposes the motion of the rocket. If we consider thrust, that is, the force exerted on a rocket by the exhaust gases, then a rocket's thrust is greater in outer space than in the atmosphere or on a launch pad. In fact, gases are easier to expel in a vacuum.
A rocket's acceleration depends on three major factors, consistent with the equation for the...
Principle of Equivalence01:18

Principle of Equivalence

According to Albert Einstein (1897-1955), free-falling and feeling weightless are intrinsically linked. If a person were in free-fall under gravity, for example, diving towards the Earth from an airplane, they would feel completely weightless. Similarly, a person descending in a lift may feel partially weightless. Broadly speaking, it is assumed that an object in a uniform gravitational field and an object undergoing constant acceleration in the absence of gravity are under the same...
Gravitation01:16

Gravitation

In the years before Newton, a general belief prevailed that different laws governed objects in the sky than objects on Earth. When Kepler wrote down the three laws of planetary motion, explaining in detail the geometrical properties of the planetary orbits around the Sun, there was no immediate idea to discern their connection with more fundamental laws. It was Isaac Newton who, in 1665–66, figured out the connection between planetary motion, the motion of the moon around the Earth, and the...
Mass and Weight01:19

Mass and Weight

Mass and weight are often used interchangeably in everyday conversation. For example,  medical records often show our weight in kilograms, but never in the correct units of newtons. In physics, however, there is an important distinction. Weight is the pull of the Earth on an object. It depends on the distance from the center of the Earth. Weight dramatically varies if we leave the Earth's surface, unlike mass, which does not vary with location. On the Moon, for example, the acceleration due to...

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相关实验视频

Updated: Jun 17, 2026

Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology
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关于在太空和地球上的微重力条件下组织工程的新知识

Markus Wehland1,2,3, Thomas J Corydon4,5, Luis Fernando González-Torres1,2

  • 1Department of Microgravity and Translational Regenerative Medicine, Otto von Guericke University, 39106 Magdeburg, Germany.

International journal of molecular sciences
|January 10, 2026
PubMed
概括

微重力工程3D细胞培养为研究癌症和组织再生提供了先进的模型,通过减少动物试验与3R原则保持一致. 这些新方法方法 (NAM) 对翻译医学具有前景.

关键词:
癌症 癌症 癌症 癌症 癌症在微重力环境中,微重力有机生物有机物球形状的球形体是指球形状的球体.干细胞是干细胞的组成部分.组织工程是组织工程.

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科学领域:

  • 生物医学工程 生物医学工程
  • 细胞生物学 细胞生物学
  • 翻译医学是一种翻译医学.

背景情况:

  • 微重力 (μg) 能够形成3D多细胞聚合物,作为组织和疾病发展的先进模型.
  • 这些3D模型对于癌症研究,体外转移研究和再生医学至关重要,为动物试验提供了替代方案.
  • 新方法方法 (NAMs) 利用微重力暴露于人体细胞,支持生物医学研究,药理学,毒理学和放射治疗.

研究的目的:

  • 审查关于微重力工程组织及其应用的最新文献.
  • 讨论微重力模拟仪器用于生成3D细胞培养物的使用.
  • 突出这些模型在推进翻译医学方面的潜力.

主要方法:

  • 使用微重力模拟仪器,如旋转墙容器,随机定位机和静止器.
  • 培养各种类型的人体细胞,包括癌细胞 (乳腺,肺,甲状腺,前列腺,胃肠道) 和健康细胞 (淋巴细胞,干细胞,骨细胞,内皮细胞,心血管细胞).
  • 在微重力条件下分析3D球体和有机体的形成和特征.

主要成果:

  • 微重力暴露促进了各种人类细胞成长为3D球体和有机体.
  • 研究检查了各种癌症类型和健康的细胞衍生组织,证明了基于微重力模型的多功能性.
  • 数据表明,微重力工程组织是生物医学研究和翻译应用的宝贵工具.

结论:

  • 微重力工程3D细胞培养为理解复杂的生物过程提供了强大的体外模型.
  • 这些模型与3R原则 (取代,减少,改进) 保持一致,为动物试验提供了替代方案.
  • 这些发现支持基于微重力的新方法方法论在推进地球上的翻译医学方面的重要作用.