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Manuel Chacn-Fuentes Leonardo Bardehle Ivette Seguel Fernanda Rubilar Daniel Martínez-Cisterna Andrs Quiroz 《Molecules (Basel, Switzerland)》2021,26(7)
In terms of the domestication process in murtilla, studies have found changes in the concentration of phenolic compounds, with reduction of chemical defense of plants, depending on the change in the feeding behavior of insects. Thus, we hypothesized that the domestication of Ugni molinae decreases the content of phenolic compounds and modifies the feeding preference of Chilesia rudis larvae. Leaves of three parental ecotypes and four cultivated ecotypes were used in preference experiments to evaluate the mass gain and leaves consumption of larvae. Phenolic extracts from leaves of U. molinae were analyzed by HPLC. Identified compounds were incorporated in an artificial diet to assess their effect on mass gain, consumption, and survival of the larvae. The presence of phenolic compounds in bodies and feces was also evaluated. In terms of choice assays, larvae preferred parental ecotypes. Regarding compounds, vanillin was the most varied between the ecotypes in leaves. However, plant domestication did not show a reduction in phenolic compound concentration of the ecotypes studied. Furthermore, there was no clear relation between phenolic compounds and the performance of C. rudis larvae. Whether this was because of sequestration of some compounds by larvae is unknown. Finally, results of this study could also suggest that studied phenolic compounds have no role in the C. rudis larvae resistance in this stage of murtilla domestication process. 相似文献
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毛细管电泳紫外检测法测定莲须中的槲皮素、木犀草素、山萘酚、异槲皮甙 总被引:2,自引:0,他引:2
采用毛细管区带电泳紫外检测法(CZE-UV)同时测定中药莲须中槲皮素、木犀草素、山萘酚、异槲皮甙4种有效成分.研究了缓冲溶液的离子浓度、pH值和电压对分离度和迁移时间的影响,得到了最佳分离实验条件.在离子浓度为40 mmol/L Na2B4O7缓冲溶液(pH 9.0)中,分离电压为16 kV,波长为254 nm时,槲皮素、木犀草素、山萘酚、异槲皮甙4种物质在10 min内得到了良好的分离测定,其检出限分别为5.0、6.7、4.5和6.0 mg/L.本方法应用于实际样品的测定,结果令人满意. 相似文献
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维药是祖国医药学不可分割的组成部分。维药现代化,即利用现代技术研究维药的有效成分,是维药科学化、标准化、规范化、商品化和产业化的必经之路。本文建立了维药蜀葵花中有效成分芦丁、槲皮素和山柰酚的选择性提取方法,优化了高效液相色谱法(HPLC)同时测定这3种有效成分的分析条件。采用HC-C18色谱柱(250 mm×4.6 mm, 5 μm)和甲醇-0.4%磷酸(50:50, v/v)流动相,在柱温30 ℃和流速1.00 mL/min的条件下实现了3种物质之间以及和干扰物之间的基线分离。维药蜀葵花中芦丁、槲皮素及山柰酚的线性范围分别为12.5~150 μg/mL (r=0.9998), 12.5~125 μg/mL (r=0.9999)及12.5~125 μg/mL (r=0.9988),加标回收率(n=5)分别为100.3%(RSD=1.1%)、97.60%(RSD=0.47%)、97.75%(RSD=0.71%)。该方法实现了同时测定维药蜀葵花中芦丁、槲皮素及山柰酚,为其他黄酮类物质的开发应用提供了科学依据,同时也可为其他维药分析提供借鉴。 相似文献
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肾石通颗粒质量控制方法研究 总被引:1,自引:0,他引:1
目的:建立肾石通颗粒的质量控制方法.方法:采用薄层色谱法对处方中的金钱草进行定性鉴别.色谱条件为:甲苯-乙酸乙酯-甲酸(5:2:1)为展开剂,喷以3%2氯化铝乙醇溶液显色.采用高效液相色谱法测定药物中山萘素的含量.色谱柱:Agi-lent venusixBP-C18(4.6mmx250mm,5μm);流动相:甲醇-0.1%磷酸溶液(57:43);流速:1.0mL/min;柱温:25℃;检测波长:366nm.结果:供试品色谱中在与对照品色谱相应位置上具有相同颜色的斑点.山萘素在0.02~0.25μg范围内呈良好的线性关系(r=0.999 8,n=6);平均回收率为98.78%,RSD为1.24%(n=6).结论:本法操作简便、快速,分离效果好,稳定性高、重现性好,可用于控制肾石通颗粒的质量. 相似文献
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Flavonols are naturally occurring dyes that can be extracted from plants. Because of their antioxidant properties, they are thought to have health benefits. In this study, the photochemical degradation properties of selected flavonols were investigated. Dilute solutions of dyes were exposed to light from a broadband visible light source, and the rate of photodegradation was determined by measuring the decrease in fluorescence of the dyes with respect to time. At pH 9.24, the first-order rate constants for 10?µg?mL?1 solutions of myricetin, quercetin, kaempferol, and morin were 0.468, 0.162, 0.108, and 0.126?s?1, respectively. Interestingly, the stability of these historical dyes was also found to be greatly affected by pH. Awareness of the photochemical properties and stability of flavonol dyes is very important for capillary electrophoresis (CE) separations. Photodegradation of the flavonol dyes under the alkaline conditions (pH 9.2) used in CE can have a profound effect on the reproducibility of repeated separations. Even a modest decrease in pH (pH 8.5) greatly improved the stability of these dyes and enabled the successful separation of these flavonol dyes with minimal degradation over time. 相似文献
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