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为更好地利用塔罗科血橙资源,研究乳酸-超声波提取血橙皮中的果胶工艺,考查超声波功率、提取时间、提取pH、料液比、提取温度等对果胶产率的影响,利用正交试验设计得出果胶提取的最佳工艺条件.结果表明:在料液比为1∶35,提取液pH 2,超声波时间50 min,超声波功率280 W的条件下,其果胶的产率为30.53%,产品果胶总半乳糖醛酸含量为68.76%,脂化度为72.49%,含水率为8.01%,总灰分为3.25%,酸不溶灰分为0.26%. 相似文献
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Changes in phenolic content,composition, and antioxidant activity of blood oranges during cold and on-tree storage 下载免费PDF全文
ZHAO Ji-chun AO Miao HE Xiao-qin LI Wei-zhou DENG Li-li ZENG Kai-fang MING Jian 《农业科学学报》2022,21(12):3669-3683
Citrus fruits are rich in phenolic compounds that possess several health benefits. However, few studies have focused on the changes in phenolic compounds in citrus fruits during postharvest storage. This study dynamically monitored the phenolic content, components and antioxidant activity of ‘Tarocco’ blood oranges during a period of 12-week cold storage and on-tree storage, respectively. We investigated the alteration mechanism of phenolic compounds in blood oranges by evaluating phenylpropanoid pathway-related enzyme activities and gene expression. Results showed that flavanones were the main phenolic compounds in blood oranges. Both storage methods mainly stimulated the accumulation of phenolic acids to improve total phenolic content, which reached the maximum at week 12. Nonetheless, blood oranges had a higher phenolic content and antioxidant activity under on-tree storage than cold storage. Furthermore, the enzyme activities and gene expression of the phenylpropanoid pathway demonstrated that the accumulation of phenolics in blood oranges during storage was highly related to the activation of the phenylpropanoid pathway. These results demonstrate that on-tree storage is a potential approach for extending the supply period of blood orange from the perspective of phenolic compounds. 相似文献
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以卡里佐枳橙砧塔罗科血橙为材料,研究果面色泽与果实品质的相关性。结果表明,树冠不同方位的果面色泽L值(亮度)与b值(黄蓝色差)为中部>北面>西面>东面>南面,a值(红绿色差)则正好相反;树冠不同方位的果实可溶性固形物(TSS)含量为南面>东面>西面>北面>中部,维生素C(Vc)含量为南面>北面>东面>西面>中部;不同果面色泽的果实TSS和Vc含量为红色>浅红色>黄色;同一个果实不同着色部位对应的果肉TSS含量为红色和中间部位色显著高于黄色部位。果面色泽与果实品质相关性分析表明,果面a值与果实TSS、固酸比(TSS/TA)和Vc呈显著正相关,果面L值和b值则与上述果实品质指标呈极显著负相关。表明塔罗科血橙果实可依据果面红色色素(花青素)的累积差异判断果实品质 相似文献
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以7年生塔罗科血橙树为试验对象,设置黑膜(T1)、内黑外银反光膜(T2)、无色透明膜(T3)以及不覆膜为对照(CK)等4种处理,研究了塔罗科血橙园地面不同材料覆盖对塔罗科血橙果实果面、果肉和果汁的颜色以及果实内在品质的影响。结果表明,与CK相比,三种覆膜处理的塔罗科血橙果实着色明显且均匀,可溶性固形物(TSS)提高11.20%~13.20%、维生素C含量提高7.88%~14.49%、固酸比提高9.31%~14.13%,可滴定酸(TA)含量变化不大。综合比较3种地膜材料的果园地面覆盖效果,T2处理好于T1,T1好于T3,即以内黑外银色的反光膜效果相对最好。 相似文献
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由于罗坎柑橘的果实品质一直停滞不前,以至于曾经辉煌一时的罗坎柑橘一蹶不振,果品滞销,果农沮丧。为转变这一不良局面,镇雄县采取高接换头的方式对罗坎柑橘进行品种改良。共换接塔罗科血橙品种接穗20000个,改良罗坎柑橘4900株,惠及果农186户。换接第二年试果,新枝试果品质优良,重新燃起了果农对柑橘产业发展的新希望。 相似文献
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