酸蒸馏—碘滴定法测定金银花中二氧化硫残留量

目的建立酸蒸馏—碘滴定法测定金银花中二氧化硫残留量的方法。方法以金银花为样品,采用酸蒸馏-碘滴定法检测。结果二氧化硫平均回收率为85.82%,RSD为1.04%。结论本方法简便、快速,结果准确,可用于金银花中二氧化硫残留量的检测。     

银翘散主要活性成分对流感病毒性肺炎小鼠治疗作用的研究

目的:观察银翘散主要活性成分对流感病毒性肺炎小鼠的治疗作用.方法:昆明种小鼠随机分为正常组、模型组、中药组和病毒唑组,每组10只,采用鼻腔接种甲型流感病毒FM1株诱导幼龄小鼠肺炎,于感染前1 d,中药组灌服中药提取物,病毒唑组腹腔注射病毒唑注射液,正常组和模型组以等体积的生理盐水灌胃.观察各组小鼠的一般状态、肺组织形态学,各组小鼠感染5 d后处死,对肺指数及IV-RNA表达进行统计学分析.结果:与正常组比较,模型组小鼠肺指数显著增加,2组比较差异有高度统计意义(P<0.01);给药后中药组和病毒唑组小鼠肺指数显著下降,与模型组比较,P<0.01.但中药组与病毒唑组之间差异无统计意义(P>0.05).正常组肺组织未检测到IV-RNA,模型组检测到大量的IV-RNA,2组比较差异有高度统计意义(P<0.01);中药组和病毒唑组IV-RNA水平均低于模型组,差异有高度统计意义(P<0.01);但中药组与病毒唑组之间差异无统计意义(P>0.05).结论:银翘散主要活性成分对小鼠流感病毒性肺炎有较好的治疗作用.     

树型金银花无公害优质加工技术的研究

目的探讨树型金银花无公害优质加工技术。方法采用树型金银花晾晒和烘烤以及"烤房3段变温烘烤技术"。结果烘干产品比晒干产品具有明显的质量和价格优势,价格高57.1%。烤房3段变温技术第1段烘干温度控制在35～40℃,烘8～9h;第2段将温度提高到50～55℃左右,烘烤6～8h;第3段温度升到60～70℃,烘烤5～6h左右;烘干总时间不超过24h。结论无公害优质加工技术利于规模化生产,获得无公害的绿色产品,增加金银花附加值。     

Honeysuckle Aqueous Extracts Induced let-7a Suppress EV71 Replication and Pathogenesis In Vitro and In Vivo and Is Predicted to Inhibit SARS-CoV-2

Honeysuckle (Lonicera japonica Thunb) is a traditional Chinese medicine (TCM) with an antipathogenic activity. MicroRNAs (miRNAs) are small non-coding RNA molecules that are ubiquitously expressed in cells. Endogenous miRNA may function as an innate response to block pathogen invasion. The miRNA expression profiles of both mice and humans after the ingestion of honeysuckle were obtained. Fifteen overexpressed miRNAs overlapped and were predicted to be capable of targeting three viruses: dengue virus (DENV), enterovirus 71 (EV71) and SARS-CoV-2. Among them, let-7a was examined to be capable of targeting the EV71 RNA genome by reporter assay and Western blotting. Moreover, honeysuckle-induced let-7a suppression of EV71 RNA and protein expression as well as viral replication were investigated both in vitro and in vivo. We demonstrated that let-7a targeted EV71 at the predicted sequences using luciferase reporter plasmids as well as two infectious replicons (pMP4-y-5 and pTOPO-4643). The suppression of EV71 replication and viral load was demonstrated in two cell lines by luciferase activity, RT-PCR, real-time PCR, Western blotting and plaque assay. Furthermore, EV71-infected suckling mice fed honeysuckle extract or inoculated with let-7a showed decreased clinical scores and a prolonged survival time accompanied with decreased viral RNA, protein expression and virus titer. The ingestion of honeysuckle attenuates EV71 replication and related pathogenesis partially through the upregulation of let-7a expression both in vitro and in vivo. Our previous report and the current findings imply that both honeysuckle and upregulated let-7a can execute a suppressive function against the replication of DENV and EV71. Taken together, this evidence indicates that honeysuckle can induce the expression of let-7a and that this miRNA as well as 11 other miRNAs have great potential to prevent and suppress EV71 replication.     

HPLC法同时检测金银花露中6种防腐剂含量

目的建立了金银花露中6种防腐剂的含量测定方法。方法采用HPLC法。以0．025mol·L-1磷酸二氢钠溶液（磷酸调pH3．7）．甲醇为流动相梯度洗脱,分别在波长228nm、258nm处测定6种防腐剂的含量。结果9个生产厂家的19批金银花露中,有7个生产厂家的16批样品检出苯甲酸,山梨酸,对羟基苯甲酸乙酯的一种或两种。2个生产厂家的3批样品未检测出上述6种防腐剂。结论该方法简便、准确、重现性好,可用于中药液体制剂中常见防腐剂的含量测定。     

金银花提取工艺正交实验研究

目的：研究提取金银花有效成分的最佳工艺。方法：以正交设计筛选最佳提取工艺。结果：金银花的最佳提取工艺为Ａ２、Ｂ２、Ｃ３、Ｄ２。结论：加入药材１０倍量的８５％乙醇回流提取二次。每次２５ｈ是金银花的最佳提取条件。     

湘蕾金银花最佳采收时间和干燥方法的研究

目的 确定湘蕾金银花最佳采收时间和干燥方法。方法 采用高效液相色谱法测定湘蕾金银花花蕾的绿原酸含量。结果 不同时间采收的湘蕾金银花花蕾绿原酸的含量，随着花蕾增长而下降；一天中不同时间采收的花蕾绿原酸含量以清晨为高；不同干燥方法湘蕾金银花花蕾绿原酸的舍量，手工炒干最高，直接烘干法最低。结论 湘蕾金银花最佳采收时问宜在6月27日左右；一天中不同采收时间以清晨采收为佳；最佳干燥方法为杀青烘干法。     

忍冬种子萌发期间PAL活性及氯原酸含量变化

忍冬种子萌发期间ＰＡＬ活性呈不断提高趋势，并在胚根与子叶突破或脱离种应时出现两次高峰；氯原酸含量表现为持续提高，提高幅度不断加大。ＰＡＬ活性变化与氯原酸含量变化并不同步但有密切关系。笔者还测定了幼苗不同器官中的ＰＡＬ活性与氯原酸含量。     

金银花修剪技术的研究

本文介绍在平原地区栽培金银花的修剪方法。全银花通过修剪枝条,可培育株型,促发新枝,多结花蕾,一年采收3～4次花。修剪方法如用之适当,可增产18%～21%。