dewar flask

简明释义

杜瓦瓶

英英释义

例句

1.The dewar flask is essential for transporting supercooled liquids.

这个德瓦瓶对于运输超冷液体是必不可少的。

2.The scientist used a dewar flask to store the liquid nitrogen safely.

科学家使用了一个德瓦瓶来安全存储液氮。

3.He poured the helium gas into a dewar flask to keep it at a low temperature.

他将氦气倒入一个德瓦瓶中，以保持低温。

4.After filling the dewar flask, she carefully sealed it to prevent evaporation.

填充完德瓦瓶后，她小心地封住它以防止蒸发。

5.In the lab, we need a dewar flask for our cryogenic experiments.

在实验室，我们需要一个德瓦瓶用于我们的低温实验。

作文

The world of science is filled with fascinating tools and instruments that help researchers conduct experiments and make groundbreaking discoveries. One such tool is the dewar flask, a device that has become essential in laboratories, particularly in the fields of physics and chemistry. A dewar flask (德瓦瓶) is essentially a container used to hold liquid gases at very low temperatures. It is designed to minimize heat transfer, allowing scientists to store and manipulate substances like liquid nitrogen or liquid helium without them evaporating too quickly.The invention of the dewar flask can be attributed to Sir James Dewar, a Scottish chemist and physicist, who developed this remarkable device in the late 19th century. His goal was to create a container that could keep gases in their liquid form for extended periods. The dewar flask achieves this through a vacuum insulation technique, which significantly reduces heat conduction. This feature makes it invaluable for experiments that require extremely low temperatures.In practical applications, the dewar flask is used in various ways. For instance, in cryogenics, it plays a crucial role in storing supercooled liquids. Researchers use it to explore the properties of materials at near absolute zero temperatures, which helps them understand fundamental physical principles. Additionally, the dewar flask is commonly used in medical applications, such as preserving biological samples or transporting organs for transplantation. Its ability to maintain low temperatures ensures that these sensitive materials remain viable for longer periods.Moreover, the dewar flask has found its place outside the realm of professional laboratories. Many outdoor enthusiasts and camping aficionados utilize smaller versions of the dewar flask to keep drinks cold or hot for extended durations. The design of the dewar flask allows it to serve as a reliable thermos, showcasing its versatility beyond scientific use.Understanding the importance of the dewar flask goes beyond its functionality; it also represents the spirit of innovation in science. The development of this tool reflects the ongoing quest for knowledge and the desire to push the boundaries of what is possible. By enabling researchers to explore the behavior of matter under extreme conditions, the dewar flask has contributed to significant advancements in various scientific fields.In conclusion, the dewar flask is more than just a piece of laboratory equipment; it is a symbol of scientific progress and exploration. Its unique design and capabilities have made it indispensable for experiments requiring low temperatures. As we continue to unlock the secrets of the universe, tools like the dewar flask will undoubtedly play a pivotal role in our journey toward understanding the complexities of matter and energy.

科学的世界充满了迷人的工具和仪器，帮助研究人员进行实验并取得突破性的发现。其中一个工具是德瓦瓶，这是一种在实验室中变得不可或缺的设备，尤其是在物理和化学领域。德瓦瓶（Dewar Flask）本质上是一个用于在极低温度下保存液体气体的容器。它的设计旨在最小化热传递，使科学家能够存储和操作如液氮或液氦等物质，而不会让它们过快蒸发。德瓦瓶的发明归功于苏格兰化学家和物理学家詹姆斯·德瓦（Sir James Dewar），他在19世纪末开发了这一非凡的设备。他的目标是创造一个可以长时间保持气体液态的容器。德瓦瓶通过真空绝缘技术实现了这一点，大大减少了热传导。这一特性使其在需要极低温度的实验中变得不可或缺。在实际应用中，德瓦瓶有多种用途。例如，在低温技术中，它在储存超冷液体方面发挥着关键作用。研究人员使用它来探索材料在接近绝对零度温度下的性质，这有助于他们理解基本的物理原理。此外，德瓦瓶在医学应用中也很常见，例如保存生物样本或运输器官以进行移植。它维持低温的能力确保这些敏感材料在更长时间内保持可用性。此外，德瓦瓶也在专业实验室之外找到了自己的位置。许多户外爱好者和露营爱好者利用小型版本的德瓦瓶来保持饮料的冷或热，持续较长时间。德瓦瓶的设计使其可以作为可靠的保温瓶，展示了其超越科学用途的多功能性。理解德瓦瓶的重要性不仅在于其功能性；它还代表了科学创新的精神。这种工具的发展反映了对知识的持续追求和推动可能性边界的愿望。通过使研究人员能够探索物质在极端条件下的行为，德瓦瓶为各个科学领域的重大进展做出了贡献。总之，德瓦瓶不仅仅是一件实验室设备；它是科学进步和探索的象征。其独特的设计和能力使其在需要低温的实验中不可或缺。随着我们继续揭开宇宙的秘密，像德瓦瓶这样的工具无疑将在理解物质和能量的复杂性之旅中发挥关键作用。