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食品添加剂对荔枝果皮花色素苷稳定性影响的研究 总被引:12,自引:0,他引:12
研究了几种常用食品添加剂对荔枝花色素苷提取物稳定性的影响。结果表明,蔗糖、葡萄糖、乳糖可以增强荔枝花色素苷的稳定性;酸味剂如柠檬酸、酒石酸、乳酸、醋酸对荔枝花色素苷有良好的增色、护色效果;Mg2+、Zn2+、Fe2+、苯甲酸、山梨酸和β-环糊精对花色素苷的稳定性影响不明显;Ca2+有一定的增色作用,乙醇有减色作用,而VC、Cu2+对花色素苷有破坏作用。荔枝花色素苷是可广泛应用于食品、饮料和医药等行业的天然植物食用色素。 相似文献
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由桷皮酮磺化反应制得槲皮酮—5′—磺酸盐,作为光稳定剂对花青苷色素具有保护作用,同时还可起到防腐效果,加入此光稳定剂,可使木都柿色素在日光下放置45天,色素降解率只有17.7%。 相似文献
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葡萄皮渣中花色素苷的提取及其在食品工业中的应用 总被引:1,自引:0,他引:1
葡萄酒皮渣中含有丰富的花色素苷,其色质优、无毒无害,是一种极具开发意义的天然色素之一.本课题根据花色素苷的理化性质,选择了用0.1 mol/L的HCI的甲醇溶液作提取剂,在pH值为3.0~4.0及60~70℃温度下浸提30~40min,再经萃取、离心、过滤、减压浓缩,可得到液态或膏状提取物,并通过了分析检测;还对花色素苷在食品工业中的应用作了研究. 相似文献
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邵建辉 《中外葡萄与葡萄酒》2006,(2):44-46
花色素苷是葡萄与葡萄酒中重要的多酚类物质,是构成葡萄与葡萄酒颜色的重要组分[1]。研究葡萄与葡萄酒在成长与成熟过程中花色素苷的变化具有重要意义,其中花色素苷提取、分离和鉴定方法是进行研究的关键。有关花色素苷的提取方法,王华等已对此进行了详细报道[2]。因此本文主要对花色素苷的分离纯化和鉴定进行总结和探讨,为葡萄与葡萄酒花色素苷的研究提供依据。1花色素苷分离纯化方法花色素苷分离纯化的方法主要有纸层析(P C)、薄层层析(TLC)、柱层析(CC)和高效液相色谱法(HPLC)等。纸层析以水系溶液作为展开剂,并可结合使用不同组成… 相似文献
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可供开发食品添加剂(I):紫玉米色素及其生理功能 总被引:13,自引:1,他引:13
原产南美的紫玉米可提取紫玉米色素,在秘鲁、日本等国作为天然食用色素巳有长期食用史。现经HPLC和MS等分析,共检出其含有六种花色苷色素,并解明它们化学结构和含量比例。经动物试验,其能明显抑制大肠癌发生,并具有抗氧化、保护肝脏、抑制脂肪吸收、防肥胖和糖尿病生等生理活性功能。 相似文献
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Kirsten BRØNUM-HANSEN J. M. FLINK 《International Journal of Food Science & Technology》1985,20(6):725-733
Storage of freeze dried anthocyanin extract from elderberry was conducted under various conditions of water activity (a), temperature, atmosphere composition and presence or absence of light. It was found that at a, 2 0.31, water uptake has essentially no effect on the anthocyanin product. At a, p 0.5, a significant increase in anthocyanin degradation rate is observed. The BET monolayer value for water sorption (a, = approximately 0.4) coincide with the a, interval (0.315 a, 5 0.5) over which anthocyanin degradation shows a marked change in behaviour.
Temperature during storage is of prime importance to anthocyanin stability with high temperature in combination with high water activity having the most pronounced effect on the stability of anthocyanins. At conditions of 50â°C, 0.5 a, the anthocyanin half life was found to be approximately 2 months.
The two factors, light intensity and presence of oxygen, were found to have no significant effect on anthocyanin stability, indicating that anthocyanin products with limited access to water are quite inert systems. When the dry anthocyanin extract was stored at ambient temperature and low a, (5 O.3), the degradation rate was found to be so low (anthocyanin half life > 5 years) that the use of the powder in low moisture food products is evident. 相似文献
Temperature during storage is of prime importance to anthocyanin stability with high temperature in combination with high water activity having the most pronounced effect on the stability of anthocyanins. At conditions of 50â°C, 0.5 a, the anthocyanin half life was found to be approximately 2 months.
The two factors, light intensity and presence of oxygen, were found to have no significant effect on anthocyanin stability, indicating that anthocyanin products with limited access to water are quite inert systems. When the dry anthocyanin extract was stored at ambient temperature and low a, (5 O.3), the degradation rate was found to be so low (anthocyanin half life > 5 years) that the use of the powder in low moisture food products is evident. 相似文献
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低、中、高直链大米淀粉为原料,通过添加不同比例(0%、1%、2%、5%和10%)的花青素,研究花青素对淀粉理化特性的影响。结果表明,随着花青素含量的增加,淀粉的碘结合能力、表观黏度和黏弹性均降低,且这种降低趋势与直链淀粉含量相关。随着花青素含量的增加,糊化温度、焓值逐渐降低,当花青素添加量为10%时,三种体系的糊化焓值分别下降23.92%、44.91%和59.89%;添加花青素的淀粉红外图谱与原淀粉相似,但在3400 cm-1附近的吸收峰红移。此外,淀粉的结晶度随花青素的添加而呈现降低的趋势,当花青素添加量为10%时,三种体系的结晶度相对于原淀粉分别下降7.99%、15.49%和24.87%,通过扫描电镜的结果表明,添加花青素后淀粉的微观形貌呈现疏松多孔的性质。综上表明,花青素对淀粉的理化性质有明显的影响,且这一影响与淀粉中直链淀粉含量相关。本文通过研究花青素对淀粉理化特性的影响,可以为花青素在淀粉中的应用提供一定的理论依据。 相似文献
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千日红花色苷的微生物法提取及稳定性研究 总被引:1,自引:0,他引:1
采用微生物法提取千日红花色苷,研究了菌种、温度、pH值、固液比和处理时间对提取效果的影响,并探讨了在光照、酸度、氧化剂、还原剂、温度、糖及金属离子存在的条件下花色苷的其稳定性。结果表明,在可见光范围内千日红花色苷的最佳吸收波长为530nm,黑曲霉(Aspergillus niger)的提取效果优于康氏木霉(Trichoderma viride)、绿色木霉(Trichoderma koningi Oud.)。在花色苷稳定性研究中发现,光照、氧化剂、高温、Fe2+、Fe3+和Al3+存在的条件不利于花色苷的稳定,而在有还原剂存在的条件下,花色苷的稳定性增强。酸性或中性环境中,花色苷较稳定。糖、Zn2+和Ca2+对稳定性基本没有显著影响。 相似文献
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E. REVILLA E. GARCÍA-BENEYTEZ F. CABELLO 《Australian Journal of Grape and Wine Research》2009,15(1):70-78
Background and Aims: Different clones with distinctive enological characteristics have been identified in many grape cultivars, but data on differences in anthocyanin composition of clones of the same cultivar are scarce. Thus, it has been considered of interest to check changes in the anthocyanin fingerprint of six different clones of Tempranillo grapes grown in the same vineyard, and of wines made with them, over three consecutive years.
Methods and Results: Data were submitted to different statistical procedures. Despite slight differences in the anthocyanin fingerprint of some clones (relative content of different anthocyanins analysed), variations from year to year were more important than differences in the anthocyanin profile of the clones considered. This fact was also observed when the content (mg/kg grapes) of those molecules was considered. Moreover, Tempranillo wines made with different clones could be classified by discriminant analysis, using the anthocyanin fingerprint or the levels (mg/L wine) of several anthocyanins as predictor variables, and the year grapes were collected as a classification factor.
Conclusions: The anthocyanin fingerprint of six clones of Tempranillo grapes grown in the same vineyard and that of wines made with them over three consecutive years was affected mostly by weather conditions, despite slight differences in the anthocyanin fingerprint of some clones.
Significance of the Study: This is the first report on the anthocyanin composition of different clones of Tempranillo grapes and of wines made with them, and indicates that anthocyanin fingerprint of Tempranillo wines depends mainly on agroclimatic factors, and not on genetic differences among clones. 相似文献
Methods and Results: Data were submitted to different statistical procedures. Despite slight differences in the anthocyanin fingerprint of some clones (relative content of different anthocyanins analysed), variations from year to year were more important than differences in the anthocyanin profile of the clones considered. This fact was also observed when the content (mg/kg grapes) of those molecules was considered. Moreover, Tempranillo wines made with different clones could be classified by discriminant analysis, using the anthocyanin fingerprint or the levels (mg/L wine) of several anthocyanins as predictor variables, and the year grapes were collected as a classification factor.
Conclusions: The anthocyanin fingerprint of six clones of Tempranillo grapes grown in the same vineyard and that of wines made with them over three consecutive years was affected mostly by weather conditions, despite slight differences in the anthocyanin fingerprint of some clones.
Significance of the Study: This is the first report on the anthocyanin composition of different clones of Tempranillo grapes and of wines made with them, and indicates that anthocyanin fingerprint of Tempranillo wines depends mainly on agroclimatic factors, and not on genetic differences among clones. 相似文献
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花青素作为紫薯的主要生物活性物质, 具有抗氧化、预防癌症、预防心血管疾病、保护肝脏、保护大脑、降血糖血脂和阻止脂肪积累以及消除炎症等生理功能, 对于改善记忆力和抑菌也有很好的功效。我国是紫薯的生产大国、资源丰富, 从紫薯中提取花青素降低了花青素的提取成本。超声是一种非热加工的提取技术, 具有节能、省时、高效等诸多优点, 在提取植物花青素的领域越来越受欢迎。本文综述了超声辅助提取紫薯花青素的几种方法及其最新研究进展, 包括超声辅助溶剂法、超声辅助酶法、超声-微波协同法、超声辅助冻结-融解法、超声辅助双水相法, 以期为超声辅助提取紫薯花青素领域的科研工作提供理论参考。 相似文献
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本实验采用分光光度法测定体外模拟胃酸条件下紫甘薯花色苷对亚硝酸盐的清除率。考察反应时间、温度、紫甘薯花色苷用量以及食品添加剂对紫甘薯花色苷清除亚硝酸盐效果的影响。结果表明,随反应时间的延长、温度的升高、紫甘薯花色苷用量的增加及添加食品添加剂,紫甘薯花色苷对亚硝酸盐的清除能力提高。 相似文献