[生化] 不饱和脂肪酸
The flavor of nut can be improved by roasting, while the quality of the unsaturated fatty acid in nut would be decreased.
焙烤可以有效增加坚果的风味，但由于坚果中含有的大量不饱和脂肪酸极易受热氧化，因此要严格控制焙烤工艺。
Fish and seafood are rich in unsaturated fatty acid which is associated with better control of our blood cholesterol level.
鱼类及海产含丰富不饱和脂肪酸，有助更好地控制血液中胆固醇的水平。
In addition, the result of quality correlation analysis indicates that there is a negative correlation between the unsaturated fatty acid content and the protein content.
品质之间的相关分析表明：不饱和脂肪酸含量与蛋白质含量存在明显的负相关关系；
Grass-cultivated Ganodema lucidum spores oil extracted by Supercritical CO2 is mainly composed of unsaturated fatty acid and it also has higher triterpenoids .
超临界CO2萃取菌草灵芝孢子油中三萜类物质的含量较高，不饱和脂肪酸是其脂肪酸的主要组成成分。
The study on nutrient requirements of ***tary protein, unsaturated fatty acid, phospholipid and vitamins for Ayu(Plecoglossus altivelis)was reviewed.
本文就国内外关于香鱼对饲料中蛋白质、不饱和脂肪酸、磷脂及维生素等营养需求的研究进行概述。
Their fatty acids mainly are unsaturated fatty acid, the total content of EPA and DHA is 13.8% in the head and 7.77% …
鱼头和鱼肝脂质中的脂肪酸组成基本相似，不饱和脂肪酸含量较高，EPA和DHA的总含量分别为13.8%和7.77%。
The composition and changes of the fatty acid in the dried slices of Japanese flying squid, Todarodes pacificus, were stu***d. The unsaturated fatty acid was oxidized extremely fast in summer.
对北太平洋的太平洋褶柔鱼为原料制成的鱿鱼丝干制品的脂肪酸进行组成及变化研究，在夏季其不饱和脂肪酸氧化极快。
Rice milk is rich in many physiologically active components such as unsaturated fatty acid VE and trace elements, and is free of cholesterol. Rice milk has function of anti-aging as well.
米乳饮料营养丰富，富含人体必需的不饱和脂肪酸而且不含胆固醇，富含天然维生素E等生理活性物质有多种微量元素，具有抗衰老、保青春的养生功效。
The contents of the unsaturated fatty acid in membrane lipid varied periodically with the change of season.
在年周期中，不饱和脂肪酸含量的变化与龙眼耐寒性的变化呈现平行关系；
In this paper, the technology of extraction of unsaturated fatty acid from silkworm pupa oil by freezing crystallization method is investigated.
研究了从八角茴油中分离高纯度茴脑的生产工艺，探讨了冷冻结晶及精馏操作的最佳工艺条件。
Chemistry high activity of free radicals can make the unsaturated fatty acid oxidation, ****** the cell function excessively, or recession mutations and proliferation and necrosis centralis disease.
化学活性高的自由基可使不饱和脂肪酸过度氧化，使细胞功能突变或衰退，引起组织增殖和坏死而产生置人于死地的疾病。
Carry on Korean pine nut unsaturated fatty acid extraction experiment by the press way, whose results indicate the yield was much lower than the one done by supercritical CO2 extraction method.
同时用压榨法进行红松种仁不饱和脂肪酸提取的对比实验，结果显示在实验条件下其提取的收率要远低于超临界CO_2萃取法。
Compared with the raw material, soy fatty acid mixture obtained by the distillation under vacuum had lower content of unsaturated fatty acid, but higher content of saturated one.
水解液通过真空蒸馏得到大豆混合脂肪酸，混合脂肪酸不饱和脂肪酸含量比原料低、但是饱和脂肪酸含量高。
Salmon is high in unsaturated fatty acid, which can prevent heart disease from reducing blood fat and cholesterol.
三文鱼本身含有丰富的不饱和脂肪酸，通过降低血脂和胆固醇，从而防止*********病。
Cells age because cell differentiation stops. Hexapeptide contains long-chain unsaturated fatty acid which can improve the penetrability and affinity of skin, and promote cell differentiation.
细胞的衰老归因于细胞不再分化，六胜肽含长链不饱和脂肪酸，提高皮肤的渗透和皮肤的亲和力，促使细胞的分化。
Unsaturated fatty acid, especially linoleic are enriched in sunflower seed oil .
葵花油中富含不饱和脂肪酸，尤其是亚油酸。
The unsaturated fatty acid methyl esters (FAMEs) were separated from the fatty acid methyl esters mixture using urea adduct method.
以混合脂肪酸甲酯为原料，采用尿素包合法（脲包法）分离不饱和脂肪酸甲酯。
The safflower oil derived multi-unsaturated fatty acid monoglyceride was synthesized from net glycerin and virgin safflower oil catalyzed by inorganic bases.
本文以新鲜的红花油和纯甘油为原料，在无机碱催化剂的作用下，合成红花油衍生多元不饱和脂肪酸单甘酯。
Kiwi fruit seed oil has higher content of unsaturated fatty acid, which, specially, contains more than 63.99% linolenic acid.
猕猴桃籽油中不饱和脂肪酸含量较高，特别是亚麻酸含量高达63.99%。
The corn plumule oil including the human body must richly Vitamin E and the unsaturated fatty acid, the content reaches above 80%.
玉米胚芽油富含人体必须的维生素E和不饱和脂肪酸，含量达80％以上。
Thee content of unsaturated fatty acid was 80.83% and the content of necessary amino acid was 24.38%.
结果表明火龙果种仁的不饱和脂肪酸含量较高，为80.83%； 罟火龙果种仁的必需氨基酸含量为24.38%。
Benefits: Rich in vitamins and unsaturated fatty acid, avocado helps supply nutrients, replenish and lock in moisture. Keeps skin elastic and hydrated.
功能：含牛油果丰富的维生素及不饱和脂肪酸，深层保湿并持久锁住水分，同时补充肌肤营养，令您的肌肤水嫩而有弹性。
Benefits: Rich in vitamins and unsaturated fatty acid, avocado helps replenish sufficient moisture and nutrients. Leaves skin supple, elastic and looking younger.
功能：含牛油果丰富的维生素及不饱和脂肪酸，为肌肤补充丰富营养并持久保湿，令肌肤柔嫩有弹性，焕发年轻光彩。
Compared with the method of soxhlet, the SEF is better to extract unsaturated fatty acid and the extracting time was shorter.
与采用索氏提取法提取扇贝内脏脂质相比较，结果表明，超临界萃取法更适合不饱和脂肪酸的提取，而且提取时间短。
But in thousand fruits needs richly including the human body Vitamin E and the unsaturated fatty acid, are helpful in the prevention heart blood vessel of brain illness get sick and anti-senile.
而千果中富含人体所需的维生素E及不饱和脂肪酸，有助于预防心脑血管疾病及抗衰老。
不饱和脂肪酸（unsaturated fatty acid）是指分子链中含有一个或多个碳碳双键（C=C）的脂肪酸，其化学通式可表示为： $$ RCOOH $$ 其中R为含双键的烃链。根据双键的数量，可分为单不饱和脂肪酸（如油酸，含1个双键）和多不饱和脂肪酸（如亚油酸、DHA，含2个及以上双键）。双键的存在导致分子呈弯曲结构，使其在常温下多为液态。
这类脂肪酸对健康有重要作用。例如，Omega-3（α-亚麻酸）和Omega-6（亚油酸）属于必需脂肪酸，需通过饮食获取。研究表明，适量摄入可降低低密度脂蛋白胆固醇（LDL-C），减少心血管疾病风险。美国心脏协会建议，每日总脂肪摄入中不饱和脂肪酸占比应超过80%。
主要食物来源包括深海鱼类（三文鱼、鲭鱼）、坚果（核桃、杏仁）、植物油（橄榄油、亚麻籽油）及牛油果。世界卫生组织推荐每周至少食用2次富含Omega-3的鱼类，以维持神经系统和视网膜功能。
与饱和脂肪酸相比，不饱和脂肪酸的双键结构使其更易发生氧化反应。因此，食品工业常通过氢化工艺将其转化为反式脂肪酸以延长保质期，但过量摄入反式脂肪酸可能增加慢性病风险。
参考资料：
不饱和脂肪酸（unsaturated fatty acid）是指分子结构中含有一个或多个双键的脂肪酸，其碳链能够吸收额外的氢原子。这类脂肪酸在化学结构和生理功能上具有以下特点：
化学结构
与饱和脂肪酸不同，不饱和脂肪酸的碳链中存在双键（单不饱和含1个双键，多不饱和含2个及以上双键）。双键的存在导致分子呈弯曲结构，降低凝固点，因此在常温下多为液态。
分类与常见类型
健康作用
适量摄入可降低血液中的低密度脂蛋白（LDL），减少心血管疾病风险，并参与细胞膜构建及抗炎过程。
检测方法
实验室中常用气相色谱法（GC）测定其含量，通过分离和定量脂肪酸甲酯等衍生物。
对比：与饱和脂肪酸（如动物脂肪中的硬脂酸）相比，不饱和脂肪酸更易氧化，需注意保存条件；而反式脂肪酸（通过氢化加工产生）则对健康有害，需避免摄入。
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