共查询到19条相似文献,搜索用时 71 毫秒
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利用扫描电子显微镜观察了3个普通油茶优良品系的花粉形态,并利用荧光显微镜观察普通油茶杂交授粉后不同时间段花粉管的生长状况,以探讨普通油茶在山茶科中系统发育的地位以及花粉管在授粉后的动态发育过程。结果表明,普通油茶花粉形态一般为椭球或近球形,大小中等,具三沟,外壁纹饰为脑纹或桔皮状,符合山茶属花粉的种属特征,在山茶科系统发育中为较原始的类群;杂交授粉后0.5h,花粉管开始萌发,8h花粉管生长端可达花柱中部,24h穿过花柱基部进入子房,约48h即可完成受精过程;花粉萌发试验表明活体授粉的花粉萌发及生长量显著高于离体培养花粉。 相似文献
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介绍了以芝麻、大豆为主要原料的混合乳饮料的生产工艺过程,对生产过程中的技术问题进行了探讨,并对混合乳饮料进行了营养和感官评价。 相似文献
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花生、大豆、芝麻与绿茶复合饮料的研制 总被引:1,自引:0,他引:1
以花生、大豆、白芝麻、绿茶叶、姜为主要原料,添加适量的其它辅料,经烘烤、浸泡、磨浆、调配、均质、脱气、杀菌等工艺研制出口感优良、风味独特、香气浓郁、营养丰富、质量稳定的具有一定保健功效的饮料.试验采用对比试验、正交试验找出最佳工艺条件和配方.该饮料的最佳配方为:100mL饮料中混合浆液50mL,姜茶汁20mL,糖6g,柠檬酸0.15g. 相似文献
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芝麻蛋白发泡性、持水力的理论研究 总被引:8,自引:0,他引:8
本文比较系统地研究了芝麻蛋白的发泡性和持水力等功能特性,探讨了不同蛋白质浓度、pH值、离子强度和温度因素对芝麻蛋白发泡性和持水力的影响,进行了芝麻蛋白功能特性的变化规律的研究,从理论上解释了芝麻蛋白的发泡性以及持水力的变化特点,为芝麻蛋白在食品工业上的应用提供了依据。 相似文献
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中国芝麻产业现状与存在问题、发展趋势与对策建议 总被引:30,自引:1,他引:30
论述了我国芝麻生产、进出口贸易、加工产品与加工技术等现状,分析了我国芝麻产业发展中存在的主要问题以及发展趋势,并提出了建立优质芝麻标准化生产示范基地、加强科技创新和高新技术应用、延长芝麻产业化链条等促进我国芝麻产业健康发展的对策措施. 相似文献
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一种适用于油菜、大豆、花生、芝麻四种油料作物种子的RNA提取方法 总被引:1,自引:0,他引:1
油料作物种子中,大量油脂、蛋白、酚类物质的存在和易氧化的特点导致RNA提取困难。为了解决这一问题,本研究在商业化RNA提取试剂盒的基础上,通过以下3方面的改进,使之成功应用于油菜、花生、芝麻和大豆的各个时期种子RNA提取和后期的荧光定量分析实验:1)增加抗氧化剂巯基乙醇和PVP;2)根据不同作物的油脂含量调整氯仿的比例;3)改进RNA沉淀方法,加大洗脱液体积后用乙醇沉淀。与常规的CTAB、TRIZOL及文献报道的RNA提取方法比较,本方法提取的RNA更完整、得率更高、纯度更高;所得RNA被成功应用于FAD2基因的荧光定量表达分析,发现了四种作物种子不同发育时期的FAD2基因的表达差异,证明了改良方法的有效性。 相似文献
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Effect of endogenous antioxidants of sesame seeds and sesame oil to the thermal stability of edible vegetable oils 总被引:3,自引:0,他引:3
Zoe Konsoula 《LWT》2010,43(9):1379-1386
Differently processed sesame seeds were used for the preparation of sesamol, seed extract, oil extract or unsaponifiable matter. Analysis of these sesame extracts revealed that dehulling and roasting of seeds had an adverse effect on their lignan and phenolic compounds content. Various concentrations of the extracts were incorporated in vegetable oils and their effectiveness in retarding the oxidative deterioration of oils was evaluated. Additionally, the formation of oxidation products in these oil samples was correlated with their antioxidant activity and their sesamol and phenolic compounds content. Results indicated that decomposition of phenolic compounds present in oil samples induced a significant reduction in their linoleic acid peroxidation inhibition capacity and a corresponding increase in their oxidative rancidity. Sesame seed extract was the most effective in protecting oils from oxidation, suggesting that seed extract, especially the one prepared from coated-unroasted sesame seeds, may have potential application as a source of natural antioxidants in oil industry. 相似文献
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采用吸水纸检测法对我国6个芝麻主产区的13个广泛栽培的芝麻品种进行了带菌检测,并测定了5种杀菌剂对芝麻种子的消毒效果。结果表明,芝麻种子外部携带的真菌主要类群包括镰孢属(Fusarium spp.)、棒孢属(Corynespora spp.)、长蠕孢属(Helminthosporium spp.)、壳球孢属(Macrophomina spp.)、链格孢属(Alternaria spp.)、曲霉属(Aspergillus spp.)和青霉属(Penicillium spp.),其中引起芝麻茎点枯病的壳球孢属分离频率和带菌率最高。种子内部携带的真菌类群主要包括镰孢属、棒孢属、壳球孢属和曲霉属等,引起芝麻叶枯病的棒孢属真菌分离频率和带菌率最高。供试的5种杀菌剂对芝麻种子均有一定的消毒效果,其中50%扑海因和80%多菌灵处理对芝麻种子消毒效果最显著。 相似文献
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芝麻油中掺棉籽油的分光光度法研究 总被引:7,自引:0,他引:7
研究了用分光光度法测定麻油的掺假情况,该方法具有操作简单,准确度高等特点,可以定量测定芝麻油的纯度。并对4种掺假芝麻油样品进行了检验验证,其变异系数均小于5%。 相似文献
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Sesame sprouts are consumed as vegetables in Asian folk. In this study, the nutritional evaluation and antioxidant activity of sesame sprouts were investigated. As seeding days progressed, the free amino acids, γ-aminobutyric acid and total phenolic compounds in the sprouts were rapidly increased while sesamin was reduced. Although a fatty acid composition analysis showed that sesame sprouts were abundant in unsaturated fatty acids, the crude fat content was gradually reduced during sprout growth. In the antioxidant assays, it was found that the DPPH radical scavenging activity and the reducing power of the sprouts increased as the seeding days progressed, which was positively related to the total phenolic content. Sesame sprouts can be recommended for functional ingredients, as well as being an excellent dietary source of natural antioxidants. 相似文献
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Nuchanart Rangkadilok Nanthanit Pholphana Chulabhorn Mahidol Wasana Wongyai Kanya Saengsooksree Sumontha Nookabkaew Jutamaad Satayavivad 《Food chemistry》2010
Sesame (Sesamum indicum L.) seed and oil contain abundant lignans, including sesamin, sesamolin and lignan glycosides. The aim of the present study was to determine sesamin, sesamolin and tocopherol contents in sesame seed and oil available in Thailand. The results showed that there was a large variation of sesamin and sesamolin contents in products. The distribution plot of sesamin and sesamolin contents in seeds showed that the mean values of sesamin and sesamolin were 1.55 mg/g (SD = 1.63; range n.d.–7.23 mg/g) and 0.62 mg/g (SD = 0.48; range n.d.–2.25 mg/g), respectively. The range of total tocopherols of these sesame lines was 50.9–211 μg/g seed. In commercial sesame oils, the ranges of sesamin and sesamolin were 0.93–2.89 mg/g oil and 0.30–0.74 mg/g oil, respectively, and tocopherol contents were 304–647 μg/g oil. The study reveals the extensive variability in sesamin, sesamolin and tocopherol contents among sesame products. 相似文献
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芝麻大豆混合发酵酸奶的研制 总被引:8,自引:0,他引:8
以芝麻、大豆为原料,研制芝麻大豆混合发酵酸奶。应用正交试验法确定最佳工艺条件。该酸奶具有良好的凝乳状态及发酵风味,具有浓郁的芝麻香味,无豆腥味。 相似文献
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为明确发生在南阳芝麻田块的芝麻枯萎病病原物,以有效防治病害,从南阳市采集枯萎病显症芝麻植株,用常规组织分离法获得一株镰刀菌ZY-2,依据柯赫法则确定ZY-2对芝麻幼苗的致病性,显微观察形态特征,检测生物学特性,并依据核糖体基因内转录间隔区(rDNA-ITS)序列和翻译延伸因子1α基因(tef)序列对该菌进行分子鉴定。在基于rDNA-ITS序列构建的系统发育树中,菌株ZY-2与2株尖孢镰刀菌Fusarium oxysporum的参比菌株(GenBank登记号:AF69310和EU285553)在自举值98%相聚一群。基于tef基因序列构建的系统发育树中,菌株ZY-2与3株F.oxysporum的参比菌株(GenBank登记号:KF030591、KF301636和FJ985299)在自举值100%相聚一群。该菌适宜生长温度为22~31℃,最适为28℃;pH2.0~10.0范围内均可生长,最适为pH6.5~7.5;能利用多种碳源和氮源进行营养生长,但在以葡萄糖和L-脯氨酸分别作为唯一碳源和氮源的培养基上不产生分生孢子。 相似文献
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目的 利用果胶酶与纤维素酶所组成的复合酶对芝麻进行粗油体提取,探究酶法提取粗油体内在稳定机制。方法 研究在不同总酶量与复合酶配比下芝麻粗油体的提取率,比较分析了粗油体的组成成分,粒径与电位,微观结构及核磁成像、流变学特性。结果 结果表明,相比于碱法,复合酶法可显著提高粗油体的提取率,当总酶量为5%,果胶酶与纤维素酶质量比为2:1时粗油体的提取率可达68.07%,且粗油体中蛋白质与多糖的含量较高;受组成成分的影响,酶法制备粗油体的粒径较大,Zeta电位较低,粗油体中存在聚集体,且水分分布的均匀性也较差;流变特性分析则表明,酶法制备粗油体的G’和G”值普遍大于碱法制备粗油体,说明酶法制备的粗油体具有较好的网络结构。结论 为合理设计酶法提取工艺和制备应用于食品、化妆品体系的粗油体胶体体系提供了一定的参考价值。 相似文献