共查询到20条相似文献,搜索用时 235 毫秒
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储藏条件对桃仁质量的影响 总被引:1,自引:0,他引:1
目的:探讨贮藏条件对桃仁质量的影响。方法:采用重量法、滴定法和紫外分光光度法对脂肪油酸值,羟值,过氧化值和苦杏仁苷含量进行测定和正交试验。结果:炮制、温度、贮藏时间、贮藏湿度等对苦杏仁苷含量均有显著影响;温度对桃仁的酸值、羟基值、过氧化值有显著影响。结论:桃仁最佳贮藏条件为贮存温度2-10℃,干燥和去皮,贮藏时间越短越好。 相似文献
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桃仁来源于蔷薇科植物桃Prunuspersica(L .)Batsch或山桃P .davidiana (Carr .)Franch的干燥成熟种子[1] ,始载于《神龙本草经》 ,历代本草均有收载 ,具有活血祛瘀、润肠通便等功效。中国药典要求桃仁种子表面黄棕色 ,去皮后的种仁为类白色[1] ,以身干、颗粒均匀、整齐饱满、不破碎者为佳[2 ,3] 。据报道 ,桃仁含挥发油 0 4 % ,脂肪油 4 5 % ,其油中主含油酸甘油酯和少量亚油酸甘油酯 ,另含苦杏仁酸等[4 ] 。由于其油脂含量较高 ,在贮藏保管过程中 ,常易发生酸败现象。笔者对桃仁酸败度进行了考察… 相似文献
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赭朴九味润燥汤中桃仁、大黄等超声波提取工艺研究 总被引:8,自引:2,他引:8
目的优化赭朴九味润燥汤中桃仁、大黄等的超声波提取工艺.方法以蒽醌衍生物总含量、脂肪油含量为筛选指标, 采用L9(43)正交试验考察提取条件,优选出最佳提取工艺.结果最佳提取条件为依次用7,5和5倍体积的60%乙醇提取3次,每次20min;总蒽醌衍生物和脂肪油提取率分别为81.4%和51.2%;浓缩转移率分别为88.7%(n=3,RSD=1.5%)和87.4%(n=3,RSD=5.7%);固形物总收率9.7%(n=3,RSD=8.0%).结论本法确定的最佳工艺可为该处方的生产提供依据. 相似文献
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目的:建立桃仁中苦杏仁苷灵敏度高、适用性强的高效液相色谱测定新方法,并对收集于新疆地区的41批代表性药材进行含量测定。方法:样品采用索氏提取器脱脂、加入70%甲醇回流的方法灭酶和提取,色谱柱为SymmetryC18(4.6mm×150mm,5μm),以水-乙腈为流动相梯度洗脱,流量1mL·min^-1,柱温35℃,检测波长210nm。结果:方法学验证各项指标均符合要求,41批新疆桃仁中苦杏仁苷含量在2.05%-3.62%范围内,平均含量为3.04%±0.29%。结论:所建立测定方法简便、稳定、易行,可用于新疆桃仁中苦杏仁苷含量测定和质量控制。 相似文献
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桃仁定性鉴别与含量测定研究 总被引:2,自引:0,他引:2
目的建立桃仁药材定性鉴别与含量测定方法。方法采用薄层色谱法以苦杏仁苷为对照对桃仁进行定性鉴别;以HPLC法对其中的苦杏仁苷进行含量测定:色谱柱:Kromasil C18;流动相:甲醇-水(20∶80);柱温:30℃;流速:1.0mL·min^-1;检测波长210nm。结果桃仁供试品的薄层色谱中,在与对照品色谱相应的位置上,显相同颜色的斑点。苦杏仁苷峰分离良好,苦杏仁苷浓度在0.033-2.116μg范围内线性关系良好,r=1.0000,平均回收率为96.11%,RSD为2.57%;结论本方法准确、可靠,可用于桃仁的定性鉴别和含量测定。 相似文献
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桃仁-红花药对不同配比的应用数据分析 总被引:1,自引:0,他引:1
目的:分析桃仁-红花配伍在中医方剂中的应用情况,为解释方剂复杂体系内在规律和临床用药提供参考。方法:从中国中医科学院"中国方剂数据库"中检索出药物组成含有桃仁、红花的方剂401首,建立数据库,统计分析配比、主治疾病以及疾病所属科属。结果:含有桃仁、红花的方剂中,以1∶1配比出现频次最多,有214首,占53.4%;桃仁-红花药对在内科和妇科疾病中出现频次最多,分别占50.1%和30.7%;不同配比桃仁-红花的应用与疾病科属相关。结论:采用统计分析的方法研究中药药对配比及应用规律可为临床合理用药提供借鉴,也可为中药方剂的现代研究提供参考。 相似文献
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Howaida F. AbdELRahman Nils Skaug Ann Margot Whyatt George W. Francis 《Pharmaceutical biology》2013,51(6):399-404
Miswak is a widely used chewing stick in Middle Eastern and African cultures that is prepared from twigs and roots of the plant Salvadora persica L. It has been reported to inhibit dental diseases. Crude extracts of S. persica twigs and roots have demonstrated in vitro antimicrobial effects. The aim of the present study was to study the chemical composition of such extracts. Chloroform and ethanol Soxhlet extracts were investigated by gas chromatography-mass spectrometry in order to identify volatile organic components. This study is the first to report the presence of oleic, linolic and stearic acids in this plant. This work has led to the identification of a variety of low molecular weight compounds most of which are simple secondary metabolites. Among the compounds identified are esters of fatty acids and of aromatic acids, and some terpenoids. Storage of S. persica twigs for two years prior to extraction did not seem to affect the result of the chemical analysis greatly. 相似文献
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目的:研究牛至药材"地下部分"所得挥发油的化学成分。方法:采用水蒸气蒸馏法提取牛至药材"地下部分"(根)的挥发油,并用GC-MS法对其化学成分进行分析与鉴定,通过峰面积归一化法计算出各成分的相对百分含量。结果:牛至药材"地下部分"(根)挥发油中鉴定出29个化合物,占挥发油总量的 98.97%,其中10个为首次报道。结论:牛至药材"地下部位"(根)中除含有"地上部分"同类的抗菌成分外,还含有大量脂肪酸类化合物,该类物质具有较强的抗氧化作用,不能被完全忽略,同样具有一定的药用价值。 相似文献
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侧茎橐吾化学成分的研究 总被引:5,自引:0,他引:5
目的侧茎橐吾(Ligularia pleurocaulis)为菊科橐吾属植物,其根和根茎入药,有止咳化痰、活血化瘀等功效,为中药“紫菀”(中国药典2000年版收载为Aster tataricus L.f.的根及根茎)的代用品之一,称为“山紫菀”。有关侧茎橐吾的化学成分研究尚未见报道,因此,本文对侧茎橐吾的根及根茎的化学成分进行了研究。方法侧茎橐吾的根和根茎用甲醇提取,硅胶柱色谱和重结晶等方法进行分离纯化。根据化合物的理化性质和光谱数据进行结构鉴定。结果分离得到了12个化合物,即6-angeloyloxy-furanoligularenone (1),2-oxo-3-hydroxy-eremophila-1(10),3,7(11),8-tetraen-8,12-olide (2),顺芷酸(3),齐墩果酸(4),羽扇豆醇(5),β-谷甾醇(6),胡萝卜苷(7),咖啡酸(8),大黄素(9),7-甲氧基香豆素(10),阿魏酸(11)和4-羟基-2,5-二甲氧基-苯甲醛(12)。结论化合物1为新的eremophilane型倍半萜,化合物2为新的天然产物。所有化合物均为首次从本植物中得到。 相似文献
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哈士蟆卵油化学成分研究 总被引:9,自引:0,他引:9
哈士蟆油 (oviductusranae)为中国林蛙(RanatemporariachensinensisDavid .)雌蛙的干燥输卵管制品 ,系一种名贵中药材 ,对它的化学成分和药效作用研究已有综述报道[1 ] 。但中国林蛙卵 ,民间用其治疗肺虚咳嗽 ,其化学成分至今未见报道。为开发利用这一资源 ,本文以林蛙卵为原料 ,对其脂溶性部分的化学成分进行了初步研究。化合物Rl 1 :白色针状结晶 (石油醚 乙酸乙酯 ) ,mp 1 48~ 1 5 0℃ ,Liebermann Burchard反应阳性。1 H NMR (CDCl3)δ :0 68(s,3H ,C… 相似文献
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《Yao wu shi pin fen xi = Journal of food and drug analysis.》2017,25(2):391-402
In this study, the effects of salinity on growth, fatty acid, essential oil, and phenolic composition of cumin (Cuminum cyminum L.) seeds as well as the antioxidant activities of their extracts were investigated. Plants were treated with different concentrations of NaCl treatment: 0, 50, 75, and 125 mmoL. Plant growth was significantly reduced with the severity of saline treatment. This also caused important reductions in the seed yield and yield components. Besides, NaCl treatments affected fatty acid composition. Petroselinic and linoleic acids proportions diminished consistently with the increase in NaCl concentration, whereas palmitic acid proportion increased. Furthermore, NaCl enhanced essential oil production in C. cyminum seeds and induced marked changes on the essential oil quality. Essential oil chemotype was modified from γ-terpinene/1-phenyl-1,2 ethanediol in control to γ-terpinene/β-pinene in salt stressed plants. Total polyphenol content was higher in treated seeds, and salinity improved the amount of individual phenolic compounds. Moreover, antioxidant activities of the extracts were determined by four different test systems, namely 2,2-diphenyl-1-picrylhydrazyl, β-carotene/linoleic acid chelating, and reducing power assays. The highest antioxidant activities were reveled in severe stressed plants. In this case, cumin seeds produced under saline conditions may function as a potential source of essential oil and antioxidant compounds, which could support the utilization of this plant in a large field of applications such as food industry. 相似文献
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Four new isoprenylated xanthones, cudraxanthones L, M, N, and O were isolated from the ethanol extract of the root bark of CUDRANIA TRICUSPIDATA (Carr.) Bur. (Moraceae), collected in China. The structures of cudraxanthones L, M, N, and O were shown to be 1-4, respectively, on the basis of chemical and spectral evidences. 相似文献