dewar flask

简明释义

杜瓦瓶

英英释义

例句

1.He filled the dewar flask with helium gas to conduct his physics experiment.

他将氦气填充到德瓦瓶中以进行物理实验。

2.The dewar flask is essential for transporting cryogenic liquids safely.

为了安全运输低温液体，德瓦瓶是必不可少的。

3.The scientist used a dewar flask to store liquid nitrogen for his experiments.

科学家使用德瓦瓶储存液氮用于他的实验。

4.During the lab demonstration, the teacher explained how a dewar flask helps maintain low temperatures.

在实验室演示中，老师解释了德瓦瓶如何帮助维持低温。

5.I bought a small dewar flask for my home chemistry kit.

我为我的家庭化学工具包买了一个小的德瓦瓶。

作文

In the realm of scientific research and experimentation, the importance of proper equipment cannot be overstated. One such crucial instrument is the dewar flask, which plays a vital role in the storage and handling of cryogenic liquids. Named after the Scottish scientist James Dewar, this specialized container is designed to keep substances at extremely low temperatures, making it indispensable in various fields such as physics, chemistry, and biology. The dewar flask is essentially a double-walled container, with an insulating vacuum between the walls that minimizes heat transfer. This unique design allows researchers to store liquid gases like nitrogen or helium for extended periods without significant evaporation or temperature rise.The dewar flask is not only functional but also versatile. It comes in various sizes, from small laboratory flasks to large industrial containers, catering to different needs. In laboratories, scientists often use smaller dewar flasks to conduct experiments involving superconductivity or other low-temperature phenomena. For instance, when studying the properties of materials at cryogenic temperatures, the dewar flask provides a stable environment that is crucial for obtaining accurate results.Moreover, the dewar flask is essential in the field of medicine, particularly in the preservation of biological samples. For example, in cryopreservation, cells and tissues are stored at ultra-low temperatures to maintain their viability for future use. The dewar flask ensures that these samples remain frozen and protected from any external temperature fluctuations, thus preserving their integrity.Another interesting aspect of the dewar flask is its application in everyday life. For instance, many people may be familiar with thermos bottles, which are designed to keep beverages hot or cold. The technology behind these thermoses is similar to that of the dewar flask, utilizing vacuum insulation to reduce heat transfer. This means that the principles of cryogenics and thermal insulation find their way into our daily routines, often without us even realizing it.In conclusion, the dewar flask is a remarkable invention that has greatly contributed to scientific advancement and practical applications in various fields. Its ability to maintain extremely low temperatures makes it a fundamental tool for researchers, medical professionals, and even everyday consumers. Understanding the significance of the dewar flask not only highlights the ingenuity of scientific design but also illustrates the interconnectedness of science and daily life. As we continue to explore the mysteries of the universe, instruments like the dewar flask will undoubtedly play a crucial role in our discoveries and innovations.

在科学研究和实验的领域中，设备的重要性不容小觑。其中一个至关重要的仪器是德瓦瓶，它在超低温液体的存储和处理上发挥着重要作用。该容器以苏格兰科学家詹姆斯·德瓦的名字命名，旨在保持物质在极低温度下，因此在物理、化学和生物等多个领域不可或缺。德瓦瓶本质上是一个双壁容器，墙壁之间有绝缘真空，可以最小化热传递。这种独特的设计使研究人员能够在没有显著蒸发或温度上升的情况下，长时间存储液体气体，如氮气或氦气。德瓦瓶不仅功能强大，而且用途广泛。它有多种尺寸，从小型实验室瓶到大型工业容器，以满足不同需求。在实验室中，科学家们经常使用较小的德瓦瓶进行超导性或其他低温现象的实验。例如，在研究材料在低温下的性质时，德瓦瓶提供了一个稳定的环境，这对于获得准确结果至关重要。此外，德瓦瓶在医学领域也至关重要，特别是在生物样本的保存方面。例如，在冷冻保存过程中，细胞和组织在超低温下储存，以保持其未来使用的活力。德瓦瓶确保这些样本保持冻结，并保护其免受外部温度波动的影响，从而保持其完整性。德瓦瓶的另一个有趣方面是其在日常生活中的应用。例如，许多人可能熟悉保温瓶，它们旨在保持饮料的热或冷。这些保温瓶背后的技术与德瓦瓶相似，利用真空绝缘来减少热传递。这意味着，低温物理学和热绝缘的原理以某种方式融入我们的日常生活，往往在我们未曾意识到的情况下。总之，德瓦瓶是一项了不起的发明，它为科学进步及各个领域的实际应用做出了巨大贡献。它保持极低温度的能力使其成为研究人员、医疗专业人士甚至普通消费者的重要工具。理解德瓦瓶的重要性不仅突显了科学设计的智慧，也展示了科学与日常生活的相互联系。随着我们继续探索宇宙的奥秘，像德瓦瓶这样的仪器无疑将在我们的发现和创新中发挥关键作用。