unsaturation

简明释义

英[/ˌʌn.sætʃ.əˈreɪ.ʃən/]美[/ˌʌn.sætʃ.əˈreɪ.ʃən/]

n. [化学] 未饱和；不饱和现象

英英释义

单词用法

同义词

反义词

例句

1.The ability of Sunfish amphiphiles to attain a nonbilayer packing is a function of the interplay between the two alkyl chains, determined by their length and presence of unsaturation(s).

Sunfish两亲化合物可以形成非双层结构的堆积，这与两个烷基链间的相互作用有关（这种相互作用由烷基链的长度与不饱和度决定）。

2.To produce micro-biodiesel from microbial oil, transesterification conditions were studied using oil from Rhodotorula glutinis as raw material using unsaturation index of fatty acid (UIFA)as index.

为了开发微生物油脂生产微生物柴油，以胶红酵母油脂为材料，以脂肪酸不饱和指数（UIFA）为指标，探讨了微生物油脂生成脂肪酸甲酯工艺的影响因素。

3.The results showed that the oxidative stability of fats and oils were effected by the temperature, unsaturation of fatty acid, antioxidant and enhancer.

结果表明，温度的高低，脂肪酸不饱和度，抗氧化剂和增效剂的使用，均与油脂氧化稳定性有着密切的关系。

4.Conjugated unsaturation of abietic resin acids can be removed through catalytic hydrogenation to overcome the shortcomings of oxidation and color degradation in rosin.

将松香催化加氢可去除枞酸型树脂酸的共轭不饱和性，克服其易于氧化变色的缺点。

5.The increased unsaturation of membrane lipids is only the response to low temperature and has no directly relation to cold hardiness.

而膜脂脂肪酸不饱和度的增加是植物对低温生长的反应，与抗寒性无直接关系。

6.Based on the energy state of soil moisture content, soil hydrodynamics studies water flow, solute and heat transport in unsaturation soil.

土壤水动力学是以土壤中水分的能态为基础研究非饱和土壤中水分、溶质和热量运移问题的学科。

7.The polyether polyols prepared by these DMC catalysts are of low unsaturation, high relative molecular mass, narrow molecular distribution compared with traditional KOH catalysts.

实验发现，用DMC催化剂合成的聚醚与用KOH催化剂合成的聚醚相比不饱和度低，相对分子质量高，相对分子质量分布窄。

8.High levels of unsaturation in oils can lead to faster oxidation.

油中高水平的不饱和度可能导致更快的氧化。

9.Chemists often measure the unsaturation of a compound to determine its reactivity.

化学家们通常测量化合物的不饱和度以确定其反应性。

10.The unsaturation of the polymer affects its flexibility and strength.

聚合物的不饱和度影响其柔韧性和强度。

11.In organic chemistry, the presence of unsaturation can be indicated by specific tests.

在有机化学中，不饱和度的存在可以通过特定测试来指示。

12.The degree of unsaturation in fatty acids affects their physical properties.

脂肪酸中的不饱和度影响它们的物理特性。

作文

In the study of chemistry, the term unsaturation refers to the presence of double or triple bonds between carbon atoms in a molecule. This concept is crucial for understanding organic compounds and their reactivity. Unsaturated compounds, such as alkenes and alkynes, exhibit different chemical properties compared to their saturated counterparts, which only contain single bonds. The degree of unsaturation in a molecule can significantly influence its behavior in chemical reactions, making it an essential topic for students and professionals in the field.For instance, consider the simplest unsaturated hydrocarbon, ethylene (C2H4). Ethylene contains a double bond between two carbon atoms, which makes it reactive and capable of undergoing addition reactions. This property is exploited in various industrial applications, including the production of plastics and other synthetic materials. In contrast, saturated hydrocarbons like ethane (C2H6) do not have such reactive sites, making them relatively stable and less likely to participate in chemical reactions.The concept of unsaturation is also vital in biochemistry. Many biological molecules, such as fats and oils, contain unsaturated fatty acids. These unsaturated fats are known to be healthier compared to saturated fats, as they can help lower cholesterol levels in the body. The presence of double bonds in these fatty acids introduces kinks in their structure, preventing them from packing tightly together. This characteristic is why unsaturated fats are typically liquid at room temperature, while saturated fats are solid.Moreover, the degree of unsaturation can be quantified using a measure called the degree of unsaturation. This metric accounts for the number of rings and multiple bonds present in a compound. By calculating the degree of unsaturation, chemists can infer structural information about a molecule, aiding in the identification of unknown substances. For example, a compound with a high degree of unsaturation may indicate the presence of several double or triple bonds, suggesting potential sites for chemical reactions.Understanding unsaturation is not limited to chemistry; it also extends to fields such as food science and nutrition. In the culinary world, the distinction between saturated and unsaturated fats is significant. Chefs and nutritionists emphasize the importance of incorporating unsaturated fats into diets for their health benefits. Foods such as avocados, nuts, and olive oil are rich sources of unsaturated fats, promoting heart health and overall well-being.In conclusion, the concept of unsaturation plays a vital role across various disciplines, from chemistry to nutrition. Its implications on molecular structure, reactivity, and health highlight the importance of understanding this fundamental principle. As we continue to explore the intricacies of organic chemistry and its applications, the significance of unsaturation will undoubtedly remain a key focus for researchers and practitioners alike.

在化学研究中，术语unsaturation指的是分子中碳原子之间存在双键或三键的情况。这个概念对于理解有机化合物及其反应性至关重要。与只含有单键的饱和化合物相比，不饱和化合物，如烯烃和炔烃，表现出不同的化学性质。分子中的unsaturation程度可以显著影响其在化学反应中的行为，这使得它成为学生和专业人士在该领域的重要主题。例如，考虑最简单的不饱和烃乙烯（C2H4）。乙烯在两个碳原子之间含有一个双键，这使得它具有反应性，并能够发生加成反应。这一特性在各种工业应用中得到利用，包括塑料和其他合成材料的生产。相比之下，像乙烷（C2H6）这样的饱和烃没有这样的反应位点，使它们相对稳定，不太可能参与化学反应。unsaturation的概念在生物化学中也至关重要。许多生物分子，如脂肪和油，含有不饱和脂肪酸。这些不饱和脂肪被认为比饱和脂肪更健康，因为它们可以帮助降低体内的胆固醇水平。这些脂肪酸中双键的存在引入了结构中的弯曲，防止它们紧密堆积。这就是为什么不饱和脂肪通常在室温下是液态，而饱和脂肪则是固态的原因。此外，unsaturation的程度可以通过一种称为不饱和度的测量来量化。该指标考虑了化合物中存在的环和多重键的数量。通过计算不饱和度，化学家可以推断分子的结构信息，从而帮助识别未知物质。例如，具有高unsaturation程度的化合物可能表明存在多个双键或三键，暗示潜在的化学反应位点。理解unsaturation不仅限于化学；它还扩展到食品科学和营养等领域。在烹饪界，饱和脂肪和不饱和脂肪之间的区别是显著的。厨师和营养师强调将不饱和脂肪纳入饮食的重要性，以获得其健康益处。鳄梨、坚果和橄榄油等食物富含不饱和脂肪，有助于促进心脏健康和整体福祉。总之，unsaturation的概念在各个学科中发挥着至关重要的作用，从化学到营养。它对分子结构、反应性和健康的影响突显了理解这一基本原理的重要性。随着我们继续探索有机化学及其应用的复杂性，unsaturation的重要性无疑将继续成为研究人员和从业者关注的重点。