气相色谱法测定山西产地椒中麝香草酚及香荆芥酚的含量

目的: 建立气相色谱法同时测定地椒中麝香草酚和香荆芥酚含量的方法。 方法: 以毛细管柱(0.25 μm×0.32 mm,30 m),FID检测器,氮气为载气,程序升温,初始温度50℃,检测器温度230℃。 结果: 共测定了8批样品,在该色谱条件下,麝香草酚和香荆芥酚均得到良好的分离。麝香草酚和香荆芥酚的加样回收率分别为99.29%(RSD 2.51%),99.07%(RSD 2.92%)。 结论: 方法灵敏、准确,重复性好,可用于控制地椒的质量。     

Cytochrome P450-catalysed arene-epoxidation of the bioactive tea tree oil ingredient p-cymene: indication for the formation of a reactive allergenic intermediate?

1. The cytochrome P450-mediated metabolism of the tea tree oil ingredient p-cymene (p-isopropyltoluene) was studied by the application of in vitro enzymatic assays using different recombinant human cytochrome P450 enzymes.

2. In total, four enzymatic products were identified by gas chromatography-mass spectrometry. The enzymatic products identified were: thymol (2-isopropyl-5-methylphenol), p-isopropylbenzyl alcohol, p,α,α-trimethylbenzyl alcohol, and p-isopropylbenzaldehyde.

3. The enzymatic products of p-cymene resulted from catalysed enzymatic arene-epoxidation and hydroxylation reactions by the studied cytochrome P450 enzymes.

4. An in vivo study could only confirm the formation of one enzymatic product, namely thymol. Thymol was identified after enzymatic hydrolysis of glucuronide and sulphate conjugates in collected blood and urine samples.

5. The obtained results may help to increase the understanding of cases where skin sensitization and irritation by tea tree oil-containing products that are involved with allergic reactions of users of these products. The results also indicate that skin sensitization and irritation reactions not only can be explained by the frequently in literature reported auto-oxidation of tea tree resulting in bioactive oxidized products, but also now by the formation of epoxide intermediates resulting from catalysed arene-epoxidation reactions by selected human cytochrome P450 enzymes which are also located in different organs in humans.

     

HPLC法测定复方麝香草酚滴耳液中两种组份的含量

目的建立同时测定复方麝香草酚滴耳液中麝香草酚和水杨酸含量的方法。方法采用高效液相色谱法。色谱柱为Shim-pack VP-ODS(4.6×150mm,5μm),流动相为甲醇-水-磷酸(60∶40∶0.3),检测波长220nm,柱温30℃。结果水杨酸和麝香草酚分别在0.12~0.28mg.mL-1和0.06~0.14 mg.mL-1范围内线性关系良好,平均回收率分别为101.2%(RSD=0.57%)和100.1%(RSD=0.64%)。结论该方法可用于复方麝香草酚滴耳液的质量控制。     

气相色谱法测定暑湿感冒灵中麝香草酚和香荆芥酚的含量

目的:建立暑湿感冒灵(香薷、青蒿、黄芩等)中麝香草酚和香荆芥酚的含量测定方法。方法:采用气相色谱法,色谱柱为HP-17石英毛细管柱(HP50%PhMe Silicone,10 m×0.25 mm×0.25μm),柱初始温度130℃,停留14 min,以20℃/min速度一阶升温至220℃,停留36 min。结果:麝香草酚在12.51μg/mL~125.1μg/mL(r=0.999 8),香荆芥酚在21.52μg/mL~215.2μg/mL(r=0.999 7)有良好的线性关系;平均回收率分别为麝香草酚97.9%(RSD=1.69%),香荆芥酚100.6%(RSD=2.27%),重复性的RSD分别为麝香草酚1.88%、香荆芥酚1.60%。结论:该方法可靠、准确、专属性强,可以作为控制暑湿感冒灵质量的方法。     

气相色谱法同时测定拜尼多中4种有效成分含量

目的:建立气相色谱法同时测定拜尼多(康松无极膏)中薄荷脑、樟脑、水杨酸甲酯及麝香草酚的含量。方法:采用气相色谱法,色谱柱为INNOWAX石英毛细管柱(0.32 mm×30 m,0.25μm),采用程序升温法,检测器温度为250℃。结果:薄荷脑、樟脑、水杨酸甲酯及麝香草酚的回归方程分别为Y=190375.67 9507.62X(r=0.9999),Y=80436.70 9030.67X(r=0.9995),Y=73630.95 6474.46X(r=0.9999),Y=8653.41 432.18X(r=0.9998);线性范围分别为108.2—1406.6,422.0—2100.0,100.7—906.3,8.3—75.5μg·mL~(-1);回收率分别为102.6%-105.5%,109.5%-119.0%,104.0%-107.5%,100.6%-104.3%。结论:该法快速、准确、可靠,适用于康松无极膏的含量测定。     

Antispasmodic activity of extracts and compounds of Acalypha phleoides Cav

The aerial parts of Acalypha phleoides are usually prescribed in the Mexican traditional medicine for a variety of gastrointestinal complaints. The MeOH-CHCl(3) (1:1) extract of the aerial part of A. phleoides showed an inhibitory effect on the gastrointestinal propulsion of a charcoal meal in mice. In isolated guinea-pig ileum, this extract produced a concentration dependent inhibition of the contractions induced by 5-hydroxytryptamine, but it was unable to inhibit the contractions elicited by acetylcholine, histamine, KCl and BaCl(2). This extract produced also a concentration dependent inhibition of the spontaneous pendular movement of the isolated rabbit jejunum. This inhibitory activity was partially blocked by propranolol. The essential oil, obtained from the aerial part of this plant, was more potent than the MeOH-CHCl(3) (1:1) extract in inhibiting the spontaneous pendular movement of the rabbit jejunum. Thymol, camphor and gamma-terpinene were identified from the essential oil by GC-MS. These monoterpenes showed antispasmodic activity in the rabbit jejunum preparation, thymol was the most active compound, followed by camphor and gamma-terpinene. Thymol and camphor in high concentrations also showed tracheal relaxant properties, but gamma-terpinene did not. These in vivo and in vitro results tend to support the traditional use of A. phleoides as an antispasmodic agent.     

Chemical analysis and antifungal activity of Thymus striatus

The essential oil composition from Thymus striatus collected from Mountain Orjen (Montenegro) has been investigated by gas chromatography-mass spectrometry. Thymol, gamma-terpinene and p-cymene were found to be the major components. Furthermore, the oil and its major component, thymol, were analysed for potential antifungal activity against plant, animal and human pathogenic fungi from different genera by a macrodilution test. The oil exhibited a strong inhibitory effect against all fungi investigated.     

香薷止泻胶囊的质量标准研究

目的 :建立香薷止泻胶囊的质量标准。方法 :薄层色谱和高效液相色谱法。结果 :香芹酚和百里香酚的平均加样回收率分别为 97 4 9%和 99 1 6 % ,RSD =1 78和RSD =2 0 5。结论 :该方法准确、可靠 ,可以用于该制剂的质量控制     

Phytochemical,chromatographic and spectroscopic investigation of Carum copticum seeds and their potential as immunomodulatory agents

Context: Carum copticum seeds have been prescribed in the traditional system of medicine for the treatment of immune disorders, such as asthma and rheumatism.

Objective: The objective of this study was to determine immunomodulatory effects of the alcoholic extract and isolated compounds in Swiss albino mice.

Materials and methods: Seeds of C. copticum were extracted with 95% v/v alcohol. The immunomodulatory activity of the crude extract was evaluated at the doses of 100, 300, and 500?mg/kg body weight of mice, administered in mice once daily (orally) for 25?days. Volatile oil of C. copticum was isolated by steam distillation and was characterized by GLC and HPLC. Bio-assay-guided fractionation and isolation were carried out and the isolated compounds were characterized and subjected to immunomodulatory activity studies.

Results: The n-hexane fraction yielded p-cymene, carvacrol, and α-pinene. The LD₅₀ value of the crude extract was found to be 4500?mg/kg and the values reported for p-cymene, carvacrol, and α-pinene in the literature were 4750, 810, and 3700?mg/kg, respectively. The oral administration of crude extract, n-hexane fraction (HEF), and isolated oils at the dose of 500, 150, and 50?mg/kg body weight, respectively, showed a significant increase in the HA titers, DTH-response, and phagocytosis. The stimulatory effect observed, on humoral and cellular immunity, was compared with the standard (levamisole treated) and control groups.

Discussion and conclusion: The results obtained in the study endorse the traditional use of the seeds of C. copticum and the isolated constituents act as immunostimulants.     

HPLC同时测定加味香薷口服液中6种主要活性成分的含量

目的:建立同时测定加味香薷口服液(葛根、香薷、厚朴、陈皮、蚕沙、白扁豆)中葛根素、麝香草酚、香荆芥酚、和厚朴酚、橙皮苷、大豆苷含量的方法。方法:采用高效液相色谱法。采用Hypersil C18色谱柱(4.6 mm×250 mm,5μm),流动相乙腈-0.01%冰乙酸溶液(梯度洗脱),流速1 m L·min~(-1),检测波长277 nm,柱温30℃。结果:葛根素、麝香草酚、香荆芥酚、和厚朴酚、橙皮苷、大豆苷分别在0.384~4.80μg(r=0.999 3),0.048~0.60μg(r=0.999 7),0.015 6~0.195μg(r=0.999 8),0.018 2~0.227 5μg(r=0.999 2),0.226~2.825μg(r=0.999 6),0.228~2.850μg(r=0.999 5)进样量与峰面积呈良好的线性关系;平均加样回收率分别是葛根素97.98%,RSD 2.1%,麝香草酚98.88%,RSD 1.8%,香荆芥酚98.10%,RSD 2.1%,和厚朴酚100.12%,RSD 1.5%,橙皮苷100.40%,RSD 2.6%,大豆苷96.70%,RSD 1.6%。结论:该方法操作简便、稳定、重复性好,可用于加味香薷口服液中葛根素、麝香草酚、香荆芥酚、和厚朴酚、橙皮苷、大豆苷含量的同时测定。