liquid nitrogen

简明释义

液态氮

英英释义

例句

1.In cryogenics, liquid nitrogen plays a crucial role in preserving biological specimens.

在低温技术中，液氮在保存生物标本方面发挥着至关重要的作用。

2.The chef used liquid nitrogen to create instant ice cream during the cooking demonstration.

厨师在烹饪演示中使用液氮制作即食冰淇淋。

3.The scientist used liquid nitrogen to freeze the samples quickly for analysis.

科学家使用液氮快速冷冻样本以进行分析。

4.We stored the food in liquid nitrogen to keep it fresh for a longer period.

我们将食物存放在液氮中，以保持其新鲜更长时间。

5.Safety goggles should always be worn when handling liquid nitrogen.

处理液氮时应始终佩戴安全护目镜。

作文

Liquid nitrogen is a fascinating substance that has a wide range of applications in various fields, from medicine to food preservation. It is nitrogen in a liquid state at an extremely low temperature, typically around -196 degrees Celsius. The properties of liquid nitrogen make it an essential tool in laboratories and industries. For instance, in the medical field, liquid nitrogen is used for cryotherapy, a treatment that involves freezing abnormal tissues, such as warts or precancerous cells, to destroy them effectively. This method is not only efficient but also minimally invasive, allowing patients to recover quickly. In addition to its medical applications, liquid nitrogen plays a significant role in the food industry. It is commonly used for flash freezing foods, which helps preserve their texture and nutritional value. By rapidly cooling food items, liquid nitrogen prevents the formation of large ice crystals that can damage cellular structures, ensuring that the food retains its quality when thawed. This technique is particularly valuable in the production of ice cream, where liquid nitrogen is often used to create a smooth and creamy texture by freezing the mixture quickly while stirring.Moreover, liquid nitrogen is also utilized in scientific research. It is employed in cryopreservation, a process that allows scientists to store biological samples, such as cells, tissues, and even whole organisms, at ultra-low temperatures. By using liquid nitrogen, researchers can halt all biological activity, thereby preserving the samples for future study. This technology has been instrumental in fields like genetics and reproductive biology, where preserving genetic material is crucial.Furthermore, liquid nitrogen is used in various industrial applications, such as metal processing and manufacturing. It can be used to cool materials during welding or cutting, helping to prevent heat distortion and ensuring precision in the final product. In addition, liquid nitrogen is employed in the production of semiconductors, where maintaining low temperatures is essential for the proper functioning of electronic components.Despite its many benefits, working with liquid nitrogen requires caution. Due to its extremely low temperature, direct contact with skin can cause severe frostbite. Therefore, safety precautions are necessary when handling this substance. Protective gloves, goggles, and face shields are essential to prevent accidents. Additionally, working in a well-ventilated area is crucial, as liquid nitrogen can displace oxygen in the air, leading to asphyxiation in confined spaces.In conclusion, liquid nitrogen is an incredibly useful substance with diverse applications across multiple fields. From its critical role in medicine and food preservation to its importance in scientific research and industry, liquid nitrogen continues to be a vital resource. Understanding its properties and applications not only highlights its significance but also emphasizes the need for safe handling practices. As technology advances, the potential uses of liquid nitrogen are likely to expand, making it an exciting area of exploration for scientists and professionals alike.

液氮是一种令人着迷的物质，广泛应用于医学、食品保存等多个领域。它是在极低温度下的液态氮，通常约为-196摄氏度。液氮的特性使其成为实验室和工业中的重要工具。例如，在医学领域，液氮用于冷冻疗法，这是一种通过冷冻异常组织（如疣或癌前细胞）来有效摧毁它们的治疗方法。这种方法不仅高效，而且创伤小，使患者能够快速恢复。除了医疗应用外，液氮在食品工业中也发挥着重要作用。它常用于快速冷冻食品，有助于保持食品的质地和营养价值。通过迅速冷却食品，液氮防止形成大型冰晶，这些冰晶可能会损害细胞结构，从而确保解冻后食品的质量。这种技术在冰淇淋生产中特别有价值，液氮常被用来通过快速冷冻混合物并搅拌来创造光滑和奶油般的质地。此外，液氮还用于科学研究。它被用于冷冻保存，这是一个允许科学家以超低温储存生物样本（如细胞、组织甚至整个生物体）的过程。通过使用液氮，研究人员可以停止所有生物活动，从而为未来的研究保存样本。这项技术在遗传学和生殖生物学等领域至关重要，在这些领域中，保存遗传材料至关重要。此外，液氮还用于各种工业应用，如金属加工和制造。它可以在焊接或切割过程中冷却材料，帮助防止热变形，并确保最终产品的精度。此外，液氮还用于半导体的生产，在这里，保持低温对电子元件的正常运作至关重要。尽管有许多好处，但处理液氮时需要小心。由于其极低的温度，直接接触皮肤可能导致严重的冻伤。因此，在处理这种物质时，必须采取安全预防措施。保护手套、护目镜和面罩是防止事故发生的必要装备。此外，在通风良好的区域工作至关重要，因为液氮可能会取代空气中的氧气，导致密闭空间内窒息。总之，液氮是一种非常有用的物质，具有广泛的应用，涉及多个领域。从其在医学和食品保存中的关键作用，到其在科学研究和工业中的重要性，液氮继续成为一项重要资源。理解其特性和应用不仅突显了其重要性，还强调了安全处理实践的必要性。随着技术的进步，液氮的潜在用途可能会扩大，使其成为科学家和专业人士探索的激动人心的领域。