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71.
目的 初步建立预发酵-双相联合酸水解法从黄姜药材中萃取薯蓣皂素的工艺。方法 采用正交实验设计法, 以薯蓣皂素的得率为考察指标, 分别优化预发酵和双相联合酸水解法的最佳条件, 并与两类传统提取方法进行比较。结果 将黄姜药材粉末在500 r·min-1搅拌下于30 ℃预发酵72 h后, 加入浓硫酸和甲醇使它们的终浓度均为10%, 再加入石油醚形成双相体系, 并于120 ℃油浴中加热回流萃取4 h, 薯蓣皂素的平均得率为4.28%;而两类传统水解方法的得率则分别为3.01%和3.28%。结论 利用预发酵-双相联合酸水解法从黄姜药材中萃取薯蓣皂素简便易行, 并且提取率明显高于其他方法。 相似文献
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以盾叶薯蓣叶片为外植体,研究不同浓度激素组合对盾叶薯蓣愈伤组织、不定芽及再生植株的影响,并对不同材料诱导获得的再生植株中薯蓣皂苷元含量进行了分析。结果表明,诱导愈伤组织的最适培养基为MS+BA2.0mg·L-1+2,4D0.1mg·L-1;诱导不定芽及芽生长的培养基的最适培养基为MS+BA0.1mg·L-1(0.05mg·L-1)+病毒唑5mg·L-1;诱导试管苗生根的最适培养基为MS/2+IAA0.2mg·L-1+NAA0.2mg·L-1。相同外植体诱导的再生植株中薯蓣皂苷元含量差异不明显;不同盾叶薯蓣诱导的再生植株中薯蓣皂苷元含量差异明显。 相似文献
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三种鼠尾草注射液对离体大鼠心肌缺血再灌注损伤的保护作用 总被引:5,自引:3,他引:2
目的研究云南产鼠尾草属药物滇丹参、甘西鼠尾、褐毛甘西鼠尾对心肌缺血再灌注损伤的保护作用,并与丹参进行对比.方法采用Langendorff离体心脏灌流法,全心停灌后再灌流造成心肌缺血再灌注模型,通过动脉套管侧管给药.测定再灌注30min后,灌流液中CK、LDH、SOD、GSH-Px和MDA含量;同时测定离体心脏冠脉流量、心肌收缩幅度和心率.结果滇丹参、甘西鼠尾、褐毛甘西鼠尾可以对抗离体大鼠心脏停灌后再灌注引起的冠脉流量、心肌收缩幅度和心率的降低(P<0.01,P<0.05);降低灌流液中CK、LDH和MDA含量,提高SOD和GSH-Px的活力(P<0.01,P<0.05).结论滇丹参、甘西鼠尾、褐毛甘西鼠尾对在体和离体缺血/再灌注心肌有保护作用. 相似文献
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Sylvia L. Chang Vaama Patel John Giltner Richard Lee Catherine A. Marco 《The American journal of emergency medicine》2017,35(11):1734-1737
Introduction
Eye injury is the second most common cause of visual impairment and a leading cause of monocular blindness in the United States. There are approximately 6 million ED visits related to drug use annually, including misuse or abuse of pharmaceuticals and illicit drug use. The purpose of this study was to assess the relationship between ocular trauma and substance abuse among emergency department patients and to assess that relationship with demographic factors, including age and gender.Methods
This study was a retrospective, observational study conducted at Miami Valley Hospital, an urban hospital ED, in Dayton, Ohio. Eligible participants included consecutive ocular trauma patients identified by the Trauma Registry from January 2014 through January 2016. Data were collected from the ED medical record including demographic information, mechanism of injury, visual acuity, slit lamp exam findings, ED procedures, inpatient procedures, toxicology results, ED diagnosis, ED disposition, and eye exam.Results
Among 229 patients, the mean age was 44 (range 14–93). 73% of patients were male. Most patients were White (74%), followed by African American (21%), Hispanic (2%), and other (3%). Most patients arrived by ambulance (62%), followed by helicopter (30%), and walk-ins (18%). Most patients were admitted to the hospital (79%). Mechanisms of injury included motor vehicle accidents (31%) and cases of assault (28%). Most ocular trauma involved the external eye (44%), the anterior chamber (28%), the orbit (25%) and the globe (22%). The incidence of substance abuse in this patient population was high. Of the patients tested for alcohol (N = 143), 49% tested positive. Among 98 patients who received a urine toxicologic screen, 63% tested positive for at least one illicit substance, including opiates (39%), cocaine (12%), benzodiazepines (25%), and/or THC (27%). There was no significant association between substance abuse and ED disposition.Conclusion
Mechanisms of eye injury included primarily motor vehicle accidents and assault. Most ocular trauma involved the external eye, the anterior chamber, the orbit, and the globe. The incidence of alcohol and illicit substance abuse is high among ED patients with ocular trauma. 相似文献79.
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