儿童益智口服液中海参水解工艺改进研究

目的　研究并改进儿童益智口服液中海参水解工艺。方法　采用 5因素 4水平L16(45)正交试验法 ,以水解度为考察指标 ,对影响水解的因素进行研究。结果　影响海参水解的主次因素为B >A >D >C。优选的水解工艺条件为 :加酶量 (A)1.5 %、加水量 (B) 2 0倍、水解时间 (C) 6h、水解温度 (D) 5 0℃。按此优选工艺生产 ,水解度达 (2 9.2± 0 .9) % (n =3) ,与原工艺所得水解度经t检验比较 ,有极显著差异 (P <0 .0 0 1)。结论　上述结果为儿童益智口服液中海参水解工艺的改进提供了依据     

HPLC法测定西红花康复液中丹皮酚的含量

目的 :建立西红花康复液中丹皮酚的高效液相色谱分析方法。方法 :以KomasilODS 1(4 .6mm× 2 0 0mm ,5 μm)为色谱柱 ,流动相为甲醇∶水 (5 0∶5 0 ) ,流速为 1ml·min-1,柱温 4 0℃ ,检测波长 2 74nm。结果 :线性范围为 0 .0 6 3～ 0 .378μg(r =0 .9998) ,平均加样回收率为 97.2 4 % ,RSD为 2 6 .3% (n =9)。结论 :本方法快速、简便 ,适用于本制剂的质量控制。     

Facile synthesis of Nα‐protected‐l‐α,γ‐diaminobutyric acids mediated by polymer‐supported hypervalent iodine reagent in water

Abstract: Hofmann rearrangement of N^α‐Boc‐l ‐Gln‐OH mediated by a polymer‐supported hypervalent iodine reagent poly[(4‐diacetoxyiodo)styrene] (PSDIB) in water afforded N^α‐Boc‐l ‐α,γ‐diaminobutyric acid (Boc‐Dab‐OH, 1 ) in 87% yield. N^α‐Z‐derivative (Z‐Dab‐OH, 2 ) was prepared with PSDIB in 83% yield. Since the reaction of N^α‐Fmoc‐Gln‐OH by this procedure did not proceed because of the insolubility of Fmoc‐Gln‐OH in aqueous media, we synthesized Fmoc‐Dab(Boc)‐OH ( 5 ) from 2 in 54% yield. Polymyxin B heptapeptide (PMBH) which contains four Dab residues was successfully synthesized in a solution‐phase synthesis.     

丹参酮对离体肺的保护作用研究

目的观察丹参酮对离体肺的保护作用。方法24只新西兰免随机平均分为两组，对照组用LPD液行肺动脉灌注和保存，实验组用丹参酮加LPD液以同样方法灌注和保存。18h后观察形态学改变。结果光镜下两组肺泡、支气管及毛细血管结构完整，高倍视野下对照组较实验组肺泡上皮及毛细血管上皮细胞肿胀、肥大，少部分组织可见肺泡内有红细胞渗出、间隔增宽等。结论在LPD液中加入丹参酮，能够对离体肺起到更好的保护作用。     

高渗透压对豚鼠耳蜗离体外毛细胞膜电位的影响

为了解高渗透压对豚鼠耳蜗离体活外毛细胞膜电位及细胞长度的影响。我们运用粘附式细胞仪和膜电位敏感针ＤｉＢＡＣ，对豚鼠耳蜗离体外细胞在高渗环境中的膜电位相对值及细胞长度的变化进行了动态测定。     

甘油蔗糖液对哺乳动物桑椹胚的渗透反应及冻存效果研究

为了提供快速冷冻前胚胎发生部分脱水的科学依据，我们观察了家兔桑椹胚在冷冻保护液中的体积变化。当桑椹胚置于仅含３．０ｍｏｌ／Ｌ或４．０ｍｏｌ／Ｌ甘油液中，桑椹胚立即皱缩，２ｍｉｎ时体积为等渗时体积的５８．９％或５９．６＾％，１０ｍｉｎ时桑椹胚体积达到等渗量的９０．８％或７６．９％，将这些桑椹胚接着移入含３．０ｍｏｌ／Ｌ或４．０ｍｏｌ／Ｌ甘油加０．２５ｍｏｌ／Ｌ蔗糖保护液中，桑椹胚再次发生皱缩主膨大变     

Is local anaesthesia actually beneficial in flexible fibreoptic nasendoscopy?

Although the application of a topical local anaesthetic before fibreoptic nasendoscopy is routine practice in many otolaryngological outpatients, the actual benefit to the patient of this procedure remains in doubt. Eighty-two patients were recruited in this double-blind randomized control trial which compared the patients’ experiences of fibreoptic nasendoscopy with nasal preparations of Xylocaine^® (lidocaine), normal saline, and no spray to the nose and throat. A visual analogue scoring system was used to determine scores for the overall unpleasantness of procedure, receiving a spray, and taste of the spray, and pain. This study has shown significantly worse overall experience (P = 0.001) and pain (P = 0.048) scores for Xylocaine^® spray versus no spray. It is concluded that the routine use of topical local anaesthetics within the nose before routine fibreoptic nasendoscopy is not only of no value, but actually makes the experience worse for the patient.     

睡安口服液对小鼠镇静作用研究

目的:研究睡安口服液对小鼠的镇静作用。方法:通过抖笼换能器法,设置睡安口服液组与对照组,以活动曲线研究睡安口服液对Wistar种系小鼠的镇静作用。结果:对照组在给药前后有大波、中波出现,睡安口服液组可使小鼠活动明显减少,灌胃后20min大波完全消失,中波大部分消失,小波也减少。结论:说明该制剂镇静作用显著。     

高效液相色谱法测定术前儿童口服复方氯胺酮的血药浓度

目的测定儿童口服复方氯胺酮的血药浓度并探讨血药浓度与药效学的关系。方法用高效液相方法测定用药后不同时点氯胺酮(KET)、咪达唑仑(MZ)、阿托品(AT)的血药浓度;观察药物显效时间、镇静止痛效果。结果KET的tmax=(30±15)min,Cmax=(633±121)ng·mL-1;MZ的tmax=(30±15)min,Cmax=(105±35)ng·mL-1。患儿服药(10±4)min,血中可测到KET、MZ的含量;(30±20)min达峰;未检测到AT。结论复方氯胺酮口服液起效时间与其血药浓度高峰期相近。