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本文研究了不同品种啤酒的总多酚含量、游离和总酚酸含量及抗氧化能力。啤酒中酚酸含量最多的是阿魏酸,其次为芥子酸、香草酸、咖啡酸、对香豆酸、4-羟基苯乙酸;阿魏酸、咖啡酸、紫丁香酸、芥子酸和香豆酸主要以结合形式存在,对香豆酸和4-羟基苯乙酸以游离和结合形式存在。在不同类型啤酒中总多酚和酚酸的存在方式不同,用FRAP法评价不同啤酒的抗氧化能力也有显著差异。严格说来,FRAP值与多酚和酚酸含量有一定的相关性。本文也研究了用FAPR法评价单体酚酸的抗氧化能力。 相似文献
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为了探讨甘蔗不同组织中酚酸的存在形式,本文利用反相高效液相色谱法(RP-HPLC)对蔗汁、蔗叶及蔗渣三个组织中游离态和结合态的酚酸进行了定性和定量检测分析。结果表明,甘蔗组织中的酚酸主要以结合态形式存在,但其在甘蔗三个组织中的含量和存在形式有差别。甘蔗叶、蔗渣中游离的酚酸含量最高,蔗汁较低。蔗汁、蔗叶及蔗渣中总游离态酚酸含量分别为317.18 mg/kg(干固物),1568.37 mg/kg(干基)及1504.57 mg/kg(干基);总结合态酚酸含量分别为740.32 mg/kg(干固物),2725.41 mg/kg(干基),2452.13 mg/kg(干基)。在蔗汁中,咖啡酸、没食子酸主要以游离态存在,阿魏酸、香豆酸主要以结合态存在,而在蔗叶和蔗渣中,咖啡酸、阿魏酸、香豆酸主要以结合态形式存在。甘蔗不同组织中游离态酚酸的DPPH和ABTS自由基清除活性优于结合态酚酸,不同组织中的游离态酚酸和结合态酚酸含量分别与抗氧化活性呈正相关性。 相似文献
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谷物中阿魏酸的分布及其生理活性的研究进展 总被引:1,自引:0,他引:1
阿魏酸是谷物中含量最丰富的酚酸之一,且主要存在于麸皮和胚芽中,主要以不溶性的结合态存在。阿魏酸有较强的抗氧化活性和细胞保护能力,对过氧化氢、超氧自由基、羟自由基、过氧化亚硝基都有强烈的清除作用,且能抑制产生自由基的酶,增加清除自由基酶的活性。因此,阿魏酸对心脑血管疾病、阿兹海默症、癌症、糖尿病、肥胖等疾病均有一定的预防和治疗效果。主要对谷物中阿魏酸理化特性、营养价值、生理活性及其对健康影响的研究进展进行综述,旨在为相关研究者提供参考。 相似文献
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胚芽作为谷物籽粒的重要组成部分,含有丰富的营养组分。为了对谷物胚芽产品开发和技术优化提供参考,综述了谷物胚芽中脂肪、蛋白质、碳水化合物、维生素、矿物质等营养组分的构成及生理功能,对谷物胚芽精准加工技术进行了概述,指出了现今谷物胚芽产品开发存在的问题并提出了建议。谷物胚芽的稳定化处理、谷物胚芽油的提取、活性肽的制备及γ-氨基丁酸的富集等技术成为谷物胚芽研究领域的新热点。还需加大谷物胚芽活性组分应用的研究力度,进一步向功能性食品、医药等领域探索,使产品开发多元化,从而扩大谷物胚芽的应用范围,产生较好的社会效益及经济效益。 相似文献
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苍梧六堡茶与其他茶叶中酚酸的对比研究 总被引:1,自引:0,他引:1
选取苍梧盒装六堡茶、竹篓装六堡茶、云南普洱茶、桂平绿茶,以及福建乌龙茶作为研究对象,旨在探讨苍梧六堡茶与其他茶叶中酚酸含量及种类的不同。通过分离提取,结果说明了苍梧六堡茶的酚酸含量比云南普洱茶要高,比桂平绿茶和福建乌龙茶要低。其中苍梧盒装六堡茶、桂平绿茶和福建乌龙茶的50%甲醇洗脱液中酚酸纯度最高,分别为34.1%、60.0%、66.3%;苍梧竹篓装六堡茶的100%甲醇洗脱液中酚酸纯度最高,为36.8%;云南普洱茶的10%甲醇洗脱液中酚酸纯度最高,为17.8%。最后用HPLC分析检测酚酸,结果表明苍梧竹篓装六堡茶中存在两种含量较高的特征性酚酸,而云南普洱茶中也存在一种含量较高的特征性酚酸。相对于桂平绿茶和福建乌龙茶,属于黑茶的苍梧六堡茶和云南普洱茶中酚酸含量较少,但却存在一些含量较多的特征性酚酸。 相似文献
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全麦芽啤酒和麦芽玉米粗粉啤酒中脂肪酸组成的差异 总被引:1,自引:0,他引:1
本研究的目的是通过评价脂肪酸组成差异来确定是否在号称全麦的啤酒中应用了谷物。谷物啤酒和非谷物啤酒,它们所含脂肪酸之间的相关性可以作为评价啤酒中是否应用了谷物辅料的证据。我们评价了谷物麦芽啤酒及号称全麦啤酒中的脂肪组成和脂肪酸的轮廓。初步研究结果显示,不同配方的啤酒,即使用了不同原料的啤酒和其脂肪酸组成之间存在某些潜在的相关性。 相似文献
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不同成熟期蜜桔中酚酸的组成与分布 总被引:1,自引:0,他引:1
酚酸具有多种生理功能,在植物中广泛存在.柑橘可能是膳食酚酸的重要来源.采用HPLC-PDA测定了不同成熟期温州蜜桔中八种酚酸的含量,即绿原酸、咖啡酸、对香豆酸、阿魏酸、芥子酸、原儿茶酸、对羟基苯甲酸和香草酸.结果显示,果肉中酚酸含量随成熟度提高而减少,果皮酚酸含量在半成熟期最高;果皮中酚酸含量大大高于果肉;果皮果肉中都以肉桂酸型酚酸为主,苯甲酸型酚酸含量较少;蜜桔果实中绿原酸和阿魏酸是所测八种酚酸中含量最高的.对柑橘中酚酸组成与分布的研究可望应用于食品营养标识、柑橘品种的识别或加工果汗掺假的识别等. 相似文献
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Belinda Kemp Bruna Condé Sandrine Jégou Kate Howell Yann Vasserot Richard Marchal 《Critical reviews in food science and nutrition》2019,59(13):2072-2094
The visual properties of sparkling wine including foam and bubbles are an indicator of sparkling wine quality. Foam properties, particularly foam height (FH) and foam stability (TS), are significantly influenced by the chemical composition of the wine. This review investigates our current knowledge of specific chemical compounds and, the mechanisms by which they influence the foam properties of sparkling wines. Grape and yeast proteins, amino acids, polysaccharides, phenolic compounds, organic acids, fatty acids, ethanol and sugar are examined with respect to their contribution to foam characteristics in sparkling wines made with the Traditional, Transfer, and Charmat and carbonation methods. Contradictory results have been identified that appear to be due to the analytical methods used to measure and quantify compounds and foam. Biopolymer complexes are discussed and absent knowledge with regards to thaumatin-like proteins (TLPs), polysaccharides, amino acids, oak-derived phenolic compounds and organic acids are identified. Future research is also likely to concentrate on visual analysis of sparkling wines by in-depth imaging analysis and specific sensory analysis techniques. 相似文献
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燕麦是一种富含营养物质的禾本科植物,食用历史悠久。除了具有较高的营养价值外,现代研究表明,燕麦中含有酚酸类、生物碱类等功能因子,具有抗癌、调节血糖等多种生物活性,在食品、保健及其他行业中具有广阔的应用前景,受到了国内外学者的广泛关注。本文重点总结了目前燕麦中已发现的黄酮类、酚酸类、生物碱等近百种化学成分及其结构式,以期为燕麦成分的研究和开发提供参考和依据。同时对燕麦功能因子的降血糖、降脂降胆固醇、抗炎抗菌、抗肿瘤、免疫活性等进行了简要综述,旨在为燕麦产品的开发应用提供参考。 相似文献
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Sana Ikram LianYan Huang Huijuan Zhang Jing Wang Meng Yin 《Journal of food science》2017,82(10):2232-2242
Brewer's spent grain (BSG), a major brewing industry byproduct, is generated in large quantities annually. This review summarizes research into the composition and preservation of BSG, different extraction techniques for BSG proteins and phenolic acids, and the bioactivities of these phenolic components. Moreover, this article also highlights BSG integration into foodstuff for human consumption and animal feed supplements. BSG is considered a rich source of fiber, protein, and phenolic compounds. The phenolic acids present in BSG are hydroxycinnamic acids (ferulic, p‐coumaric, and caffeic acids), which have many biofunctions, such as antioxidant, anticarcinogenic, antiatherogenic, and antiinflammatory activities. Previously, attempts have been made to integrate BSG into human food, such as ready‐to‐eat snacks, cookies and bread, to increase fiber and protein contents. The addition of BSG to animal feed leads to increased milk yields, higher fat contents in milk, and is a good source of essential amino acids. Therefore, many studies have concluded that integrating the biofunctional compounds in BSG into human food and animal feed has various health benefits. 相似文献
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The medlar fruit (Mespilus germanica L.) has been gaining commercial importance in recent years, attracting research on its chemical composition. In this study, we have investigated how the degree of ripeness affects the concentrations and proportions of phenolic acids. The DPPH scavenging activity and the total phenolic content (TPC) were determined. Five stages of fruit maturity were studied and eight phenolic acids (protocatechuic, 4-hydroxybenzoic, syringic, 3-hydroxybenzoic, caffeic, salicylic, 4-coumaric and sinapic) were determined by HPLC–MS. The concentrations of phenolic acids mostly decreased as the fruit ripening progressed, except for insoluble ester-bound phenolics, which increased at the early stages of maturity and decreased only during the ripe to over-ripe stage of maturity. The DPPH scavenging activity also decreased during fruit maturation, suggesting a decrease of natural antioxidants in fruit. A strong correlation between TPC and antioxidant capacity measured by the DPPH method was found. The data presented demonstrates the influence of ripening on the phenolic acid content and antioxidant properties of medlar fruit. 相似文献
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Imran Pasha Imran Saqib Masood Sadiq Butt Muhammad Atif Randhawa Khalid Waqas 《International Journal of Food Properties》2013,16(9):2052-2062
The core objective of the current research was to determine the phenolic acids through High performance liquid chromatography (HPLC) in milling fractions of spring wheats, i.e., bran, shorts, break, and reduction flour. In wheat bran, caffeic, p-coumaric, syringic, and ferulic acid ranged from 0.93 to 1.5, 24 to 32.00, 55.30 to 94, and 137.25 to 180.30 μg/g, respectively. Maximum caffeic acid (0.33 μg/g), p-coumaric acid (12.12 μg/g), and ferulic acid content (29.12 μg/g) were found in the reduction flour of Sehar-2006. Furthermore, whole wheat flour of Shafaq-2006 revealed maximum caffeic acid (1.8 μg/g), p-coumaric acid (22.3 μg/g), and syringic acid (47.07 μg/g). Since antioxidant activity is directly related with phenolic acids, it was decreased (43.26 to 74.40%) in cookies with the decrease in phenolic acids during storage. Moreover, phenolic acids hold potential to be extracted and utilized in cereal-based products for best quality and value addition. 相似文献