liquid nitrogen

简明释义

液态氮

英英释义

例句

1.Safety goggles should be worn when handling liquid nitrogen to prevent eye injuries.

处理液氮时应佩戴安全护目镜，以防止眼部受伤。

2.In cryogenics, we often use liquid nitrogen to cool down materials to extremely low temperatures.

在低温技术中，我们经常使用液氮将材料冷却到极低的温度。

3.The laboratory stores samples in liquid nitrogen to preserve their integrity.

实验室将样品存放在液氮中以保持其完整性。

4.Some chefs use liquid nitrogen to create unique frozen desserts instantly.

一些厨师使用液氮快速制作独特的冰冻甜点。

5.When you pour liquid nitrogen on the ground, it creates a fog-like effect.

当你把液氮倒在地上时，会产生一种雾状效果。

作文

Liquid nitrogen is a fascinating substance that has numerous applications across various fields, including medicine, engineering, and food preservation. It is nitrogen in a liquid state at an extremely low temperature of -196 degrees Celsius (-321 degrees Fahrenheit). This makes liquid nitrogen an essential tool for cryogenic processes, where materials are cooled to very low temperatures for scientific and industrial purposes. One of the most common uses of liquid nitrogen is in the field of cryopreservation, where biological samples such as sperm, eggs, and embryos are stored at ultra-low temperatures to maintain their viability over long periods. This technique has revolutionized reproductive medicine and has enabled countless individuals to start families through assisted reproductive technologies.In addition to its medical applications, liquid nitrogen is widely used in the culinary world, particularly in molecular gastronomy. Chefs use liquid nitrogen to create unique textures and presentations in dishes. For instance, ice cream can be made in seconds by mixing cream and sugar with liquid nitrogen, resulting in a smooth and creamy dessert that is unlike any traditional ice cream. The rapid freezing process prevents the formation of large ice crystals, which often leads to a grainy texture in conventional ice creams. Moreover, liquid nitrogen is also utilized in the preservation of food products. It can quickly freeze fruits and vegetables, locking in their freshness and nutritional value. This method is particularly beneficial for the food industry, as it allows for the long-term storage of seasonal produce without compromising quality. However, while liquid nitrogen offers many benefits, it must be handled with caution. Due to its extremely low temperature, direct contact with skin can cause severe frostbite or cold burns. Therefore, safety protocols must be followed when working with liquid nitrogen. Protective gloves, goggles, and face shields should be worn to prevent accidents. Additionally, it is crucial to ensure proper ventilation when using liquid nitrogen, as it can displace oxygen in the air, leading to a risk of suffocation in enclosed spaces.In conclusion, liquid nitrogen is a remarkable substance that plays a vital role in various industries. Its ability to preserve biological samples, create innovative culinary experiences, and enhance food preservation makes it an invaluable resource. However, the potential hazards associated with its use necessitate careful handling and adherence to safety guidelines. As technology continues to advance, the applications of liquid nitrogen are likely to expand even further, contributing to scientific progress and culinary creativity.

液氮是一种迷人的物质，在医学、工程和食品保存等多个领域都有广泛的应用。它是在极低温度下的液态氮，温度为-196摄氏度（-321华氏度）。这使得液氮成为冷冻过程中的重要工具，在科学和工业中用于将材料冷却到非常低的温度。液氮最常见的用途之一是在冷冻保存领域，生物样本如精子、卵子和胚胎在超低温下储存，以保持其长期的活力。这项技术彻底改变了生殖医学，使无数人能够通过辅助生殖技术建立家庭。除了医学应用外，液氮在烹饪世界中也被广泛使用，特别是在分子美食学中。厨师们利用液氮为菜肴创造独特的质感和呈现方式。例如，通过将奶油和糖与液氮混合，可以在几秒钟内制作出冰淇淋，得到一种与传统冰淇淋截然不同的光滑和奶油状的甜点。快速冷冻过程防止了大冰晶的形成，这通常会导致传统冰淇淋的颗粒感。此外，液氮还用于食品产品的保存。它可以迅速冷冻水果和蔬菜，锁住它们的新鲜和营养价值。这种方法对食品行业尤其有益，因为它允许在不影响质量的情况下长期储存季节性农产品。然而，尽管液氮提供了许多好处，但必须谨慎处理。由于其极低的温度，直接接触皮肤可能会导致严重的冻伤或冷烧。因此，在使用液氮时必须遵循安全协议。应佩戴保护手套、护目镜和面罩，以防止事故。此外，在使用液氮时确保良好的通风至关重要，因为它可能会取代空气中的氧气，导致封闭空间中的窒息风险。总之，液氮是一种了不起的物质，在各个行业中发挥着重要作用。它在保存生物样本、创造创新的烹饪体验和增强食品保存方面的能力，使其成为一种宝贵的资源。然而，与其使用相关的潜在危险需要小心处理并遵循安全指南。随着技术的不断进步，液氮的应用可能会进一步扩展，为科学进步和烹饪创造力做出贡献。