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《食品科技》2020,(7)
采用国标方法对喙核桃和核桃中矿质元素、氨基酸等营养成分总量及组分进行了测定,旨在为珍稀种质资源喙核桃的开发利用提供依据。结果表明,核桃磷和镁含量显著(P0.05)高于喙核桃,钙含量显著低于喙核桃,锌和钾含量差异不显著。核桃和喙核桃均含有常见的16种氨基酸,且核桃的氨基酸总量(∑TAA)、必需氨基酸(∑EAA)、半必需氨基酸(∑HEAA)、非必需氨基酸(∑NEAA)以及鲜味氨基酸总量(∑DAA)均显著(P0.05)高于喙核桃;核桃与喙核桃的∑ EAA/∑ TAA、∑ DAA/∑ TAA、∑ EAA/ ∑NEAA比值无显著差异(P0.05);喙核桃的的支/芳值显著(P0.05)高于核桃;赖氨酸为喙核桃和核桃的第一限制性氨基酸;喙核桃氨基酸指数明显低于核桃。37种脂肪酸组分中,喙核桃检测出9种,核桃检测出8种,其脂肪酸组分基本相似。综合考量,喙核桃的氨基酸和脂肪酸种类丰富,组成和核桃相似,即可补钙又富含优质的蛋白质,具有较好的经济价值和开发前景。 相似文献
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《粮油加工(电子版)》2014,(8)
针对核桃加工存在的问题和市场需求,本文介绍了核桃去青皮清洗加工技术,核桃破壳、壳仁分离技术及核桃射频杀虫技术,可完成核桃的大小分级、去青皮清洗、机械破壳、壳仁分离、核桃仁分级和贮藏前杀虫处理等作业,为核桃的精深加工提供了保障;介绍核桃的深加工技术及产品,丰富核桃产品市场,加强对核桃的综合利用开发,全面充分的利用核桃资源。 相似文献
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核桃青皮的综合应用及开发前景 总被引:3,自引:0,他引:3
根据核桃青皮中各种化学成分的不同作用,从医药、农药、色素提取等方面阐述了核桃青皮的应用情况,并简述了核桃青皮的开发前景,为进一步开发和利用中国丰富的核桃青皮资源提供思路,以提高核桃青皮附加值和促进核桃产业的发展。 相似文献
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耿树香宁德鲁陈海云贺娜 《中国油脂》2020,45(4):97-101
为了探究我国不同主产区核桃品质差异,选择10个有代表性的云南核桃样品及12个其他产区普通核桃样品进行核桃青皮、仁、分心木中主要营养成分分析与评价。测定了核桃青皮中的黄酮、单宁和胡桃醌含量,核桃仁中粗蛋白、粗脂肪、维生素E、褪黑素、磷脂和氨基酸总量及分心木中的粗脂肪、粗蛋白、黄酮和氨基酸总量。对不同主产区核桃品质进行了主成分分析。结果表明:云南主栽的10个品种核桃青皮、仁、分心木中主要营养成分总体优于普通核桃。 相似文献
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比较了不同的预处理方式对低温和高温脱脂核桃粕酶解得到核桃肽的抗氧化活性和得率的影响.结果表明,对低温脱脂核桃粕进行加热、超声波、微波和碱提等预处理可以提高其酶解得到核桃肽的抗氧化活性和得率.其中,碱提得到核桃肽的抗氧化活性和得率分别为0.85±0.01、32.55%,微波预处理得到核桃肽的抗氧化活性和得率分别为0.86±0.03、34.63%,高于直接酶解得到的核桃肽的抗氧化活性和得率(0.72±0.08、18.46%),且差异具有显著性(P<0.05).而高温脱脂核桃粕进行碱提等预处理与直接酶解得到核桃肽的抗氧化活性无明显差异. 相似文献
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八种多酚与核桃蛋白相互作用的研究 总被引:1,自引:0,他引:1
为研究多酚对核桃蛋白结构及加工特性的影响,采用阿魏酸、白藜芦醇、橙皮素、儿茶素、槲皮素、姜黄素、没食子酸、杨梅素分别与核桃蛋白复合,分析了8种多酚与核桃蛋白互作的紫外可见和荧光光谱,并研究了多酚对核桃蛋白的溶解性、持水性、吸油性、泡沫性能和变性温度的影响。结果表明,8种多酚与核桃蛋白形成了新的复合物,其对核桃蛋白的荧光猝灭作用以静态猝灭为主,主要作用力以氢键为主,疏水相互作用为辅。8种多酚均降低了核桃蛋白的溶解性和持水性,其中槲皮素对核桃蛋白溶解性的降幅最大,阿魏酸对持水性的降幅最大;除儿茶素、橙皮素、槲皮素外,其他多酚对核桃蛋白的吸油性影响不大;大部分多酚对核桃蛋白的起泡性和起泡稳定性有提高作用。与8种多酚复合后,核桃蛋白的热稳定性均得以提高。总体来看,姜黄素、橙皮素、杨梅素对核桃蛋白的加工性质和热性能影响较大,而儿茶素影响较小。综上,该研究初步探讨了8种多酚对核桃蛋白结构和性质的影响,可为多酚在核桃蛋白制品中的应用提供借鉴。 相似文献
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Figueroa-González I Quijano G Ramírez G Cruz-Guerrero A 《Journal of the science of food and agriculture》2011,91(8):1341-1348
Owing to their health benefits, probiotics and prebiotics are nowadays widely used in yogurts and fermented milks, which are leader products of functional foods worldwide. The world market for functional foods has grown rapidly in the last three decades, with an estimated size in 2003 of ca US$ 33 billion, while the European market estimation exceeded US$ 2 billion in the same year. However, the production of probiotics and prebiotics at industrial scale faces several challenges, including the search for economical and abundant raw materials for prebiotic production, the low-cost production of probiotics and the improvement of probiotic viability after storage or during the manufacturing process of the functional food. In this review, functional foods based on probiotics and prebiotics are introduced as a key biotechnological field with tremendous potential for innovation. A concise state of the art addressing the fundamentals and challenges for the development of new probiotic- and prebiotic-based foods is presented, the niches for future research being clearly identified and discussed. 相似文献
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常用消毒灭菌法及其机理与应用 总被引:3,自引:0,他引:3
介绍了采用消毒灭菌方法,有加热消毒法,紫外线辐射法和化学药剂消毒法。常用化学药剂有醛类、含氯消毒剂、醇类消毒剂以及高锰酸钾、生石灰等,阐释了消毒与灭菌两个概念的区别。 相似文献
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The objectives of the current study were to investigate the relationship between body condition score (BCS) and dairy form and changes in genetic parameters for BCS and dairy form within and across lactations and age. Body condition score and dairy form were obtained from the Holstein Association USA, Inc. Records were edited to include those cows classified between 24 and 60 mo of age and between 0 and 335 d in milk (DIM). A minimum of 20 daughters per sire and 15 cows per herd-classification visit were required. The dataset consisted of 135,178 records from 119,215 cows. Repeatability, multiple trait, and random regression models were used to analyze the data. All models included fixed effects for herd-classification visit, age within lactations 1, 2, and 3 or higher, and 5th-order polynomials for DIM. Random effects included sire and permanent environment for all models. Random regression models included age at classification nested within sire or DIM and lactation number nested within sire. Genetic variance for both BCS and dairy form was lowest in early lactation and highest in midlactation. Genetic correlations within and across lactations were high. The genetic correlation between DIM 0 in lactation 1 and DIM 305 in lactation 3 was estimated to be 0.77 for BCS and 0.60 for dairy form. The genetic correlation estimate between 30 mo of age at classification and 50 mo of age at classification was 0.94 for both dairy form and BCS. The repeatability models appeared to generate accurate evaluations for BCS or dairy form at all ages and stages of lactation. 相似文献
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A. FOSTER 《International journal of cosmetic science》1979,1(4):221-245
An historical reference is followed by a review of cosmetic colours’ regulations based on the EEC Directive with particular reference to the U.K. Cosmetic Products Regulations and their effect on formulation. Les reglementations des colorants pour cosmetiques 相似文献
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法国R.Stat公司活跃在导电纤维市场已有20年之久,但是,办公室雇员、宾馆客人、飞机乘客、在易爆炸环境中工作的人员、木材或纸浆工业操作人员、消防队员和军人,由于得益于R.Stat公司生产的导电纤维的保护,而免遭令人不舒服的电击,或者免遭火灾和爆炸的伤害,这些却无人知晓。 相似文献