高效液相色谱法测定磷酸肌酸二钠盐含量及应用

目的 :为磷酸肌酸二钠盐提供快速准确的 HPL C分析方法。方法 :C1 8柱 (4.6 mm× 2 5 0 mm,5μm)。流动相 :0 .0 8%四丁基季铵磷酸盐水溶液 (冰醋酸调至 p H 3.0 )。检测波长 :2 10 nm。结果 :磷酸肌酸二钠盐在 0 .0 342～ 0 .171mg/ ml浓度范围内 ,呈良好的线性关系 ,Y =1.386 98e- 8X +0 ,r=0 .9997,RSD =0 .4 6 % (n =5 ) ,5批样品磷酸肌酸二钠盐含量分别为 70 .31%、70 .5 6 %、70 .19%、70 .5 8%和 70 .2 2 % ,对照品精密度试验 RSD =0 .34% (n =5 ) ,样品重现性试验 RSD =0 .37% (n =5 ) ,分离度为 10 .6 9。结论 :应用本方法可快速、简便、准确测定磷酸肌酸二钠盐的含量     

南瓜子的研究进展

本文对近年来有关南瓜子的化学成分、药理作用、临床应用等方面的研究进展作一概述。其化学成分主要含有脂肪酸，植物甾醇，氨基酸，维生素和矿物质等。药理研究表明有驱除寄生虫，降低LDL胆固醇，抗炎，缓解高血压，减少膀胱和尿道张力等作用，毒性很小。临床报道用于治疗绦虫病，血吸虫病，前列腺炎，前列腺增生，改善膀胱刺激征，防止尿道结石形成等。     

光动力疗法治疗中心性渗出性脉络膜视网膜病变疗效观察

目的观察光动力疗法(PDT)治疗中心性渗出性脉络膜视网膜病变(CEC)的临床疗效及安全性。方法回顾28例经眼底检查、荧光素眼底血管造影(FFA)及光相干断层扫描(OCT)确诊的CEC患者28只患眼PDT治疗前后的临床资料,对比分析治疗前后的视力、眼底像、FFA及OCT检查结果,统计重复治疗的次数,观察治疗的安全性。28例患者平均年龄31.5岁,就诊时最佳矫正视力0.02~0.8。28只眼共治疗38次,其中,22只眼治疗1次,3只眼治疗2次,2只眼治疗3次,1只眼治疗4次。PDT治疗后平均随访时间26个月。结果PDT治疗后末次随访时,视力提高≥2行的视力明显改善者21只眼,占75.00%;视力波动在1行以内的视力稳定者5只眼,占17.86%;视力下降≥2行的视力下降者2只眼,占7.14%。FFA检查显示:21只眼CNV完全闭合,占75.00%;3只眼CNV部分闭合,占10.71%;4只眼CNV未闭合或CNV扩大,占14.29%。有6只眼出现视网膜色素上皮损害,占21.43%。结论PDT治疗CEC对于大多数患者是安全有效的,对于小病变,可以适当减小光斑治疗;对于一次治疗效果不佳的患者,重复治疗应考虑其病因。     

羊红膻根中羊红膻素G等的分离和鉴定

目的:对羊红膻根进行降压有效成分的分离和鉴定。方法:采用柱层色谱法进行分离,光谱技术鉴定化合物的结构。结果:从其根中分得3个化合物,2(1′,2′环氧基)丙基4甲氧基苯酚(2″甲基)丁酸酯(Ⅰ),4(1丙烯基)苯酚(Ⅱ),2甲基丁酸(Ⅲ)。结论:Ⅰ为一新化合物,定名为羊红膻素G,Ⅱ,Ⅲ为首次从该植物中分离得到。     

山东丹参脂溶性组分HPLC指纹图谱及有效成分含量测定

目的:研究丹参脂溶性组分的HPLC指纹图谱,建立同时测定丹参中丹参酮ⅡA、隐丹参酮、丹参酮Ⅰ的HPLC分析方法。方法:采用HPLC法,以乙腈—水溶液为流动相进行梯度洗脱。结果:线性范围内3个组分的标准曲线呈良好的线性关系,平均加样回收率均在98%～103%。所有化合物的精密度和重复性的RSD均<3%,并建立了山东丹参脂溶性组分的HPLC标准指纹图谱。结论:该分析方法稳定可靠、重复性好,可同时分析丹参中的3个不同化合物,可为山东产丹参脂溶性组分指纹图谱及其质量控制的研究提供参考。     

于敏教授治疗慢性肾衰竭经验撷菁

针对慢性肾衰竭病程长,病情复杂且严重,并发症多和死亡率高等特点,介绍于敏教授运用内服中药汤剂辨证论治与中医外治法相结合治疗本病的临证经验和用药体会。     

Anti-atherogenic effects of the aqueous extract of rhubarb in rats fed an atherogenic diet

The present study was designed to investigate whether the aqueous extract of rhubarb (AR) could prevent the development of atherosclerosis through regulating vascular inflammatory processes in rats fed with an atherogenic diet. AR significantly reduced plasma low-density lipoprotein-cholesterol, and increased plasma high-density lipoprotein-cholesterol in rats fed with an atherogenic diet. AR inhibited vascular expressions of endothelin-1 (ET-1) and endothelin-converting enzyme (ECE) induced in rats with an atherogenic diet. On the other hand, AR augmented the vascular expression of endothelial nitric oxide synthase (ecNOS) and restored vascular nitric oxide (NO) production. Furthermore, AR suppressed the elevated expression of vascular nuclear factor-kappaB (NF-kappaB) p65 as well as adhesion molecules, including intracellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and E-selectin in rats fed with an atherogenic diet. Also, AR decreased endothelial expression of ICAM-1 and ET-1 in aorta. These results suggest that AR suppresses the development of atherosclerosis in the atherogenic-diet rat model through inhibiting vascular expressions of proinflammatory and adhesion molecules via the regulation of nitric oxide and endothelin system.     

Reference charts and equations of Korean fetal biometry

OBJECTIVE: To construct new reference charts and equations for fetal biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur diaphysis length (FDL) from Korean fetuses at 12-40 weeks. METHOD: Prospective cross-sectional data obtained in one center for 5 years from a population of pregnant women undergoing ultrasound examination between the 12th and 40th week of gestation. Exclusion criteria comprised all maternal and fetal conditions possibly affecting fetal biometry. No fetuses were excluded on the basis of abnormal biometry. For each measurement, regression models were fitted to estimate both the mean and the standard deviation at each menstrual age. RESULTS: Biometric measurements were obtained for 10 455 fetuses. New charts and reference equations are reported for BPD, HC, AC and FDL. Reference equations are cubic models. CONCLUSION: We present new Korean reference charts and equations for fetal biometry. They can be easily used in obstetric ultrasound studies for the Korean population.     

Three-vessel view of the fetal heart: in utero development of the great vessels

OBJECTIVES: The purpose of our study is to provide reference values for the great vessels obtained from images of the three-vessel view of the fetal heart, with an emphasis on the size discrepancy of the great vessels. METHODS: From February 2003 to May 2003, the main pulmonary artery (MPA), ascending aorta (AA), and SVC were measured in well-dated, nonanomalous fetuses scanned at 14-38 weeks of gestation. RESULTS: The size of each great vessel had a significant positive relationship with advance in gestation (P < 0.001); MPA (mm) = -2.76 + 0.34 x GA, ascending aorta (AA) (mm) = -1.73 + 0.26 x GA - 1.18E - 05 x GA(3), and SVC (mm) = 0.33 + 0.01 x GA(2) - 4.12E - 05 x GA(3). The AA/MPA ratio was significantly decreased with advance in gestation, while the SVC/AA ratio was significantly increased; AA/MPA ratio = -1.24 - 0.03 x GA + 3.88E - 04 x GA(2); P < 0.001, SVC/AA ratio = 0.63 - 5.43E - 03 x GA + 1.96E - 04 x GA(2); P < 0.001. CONCLUSION: On the three-vessel view of the fetal heart, the interpretation of the size discrepancy of the great vessels needs to be adjusted according to fetal growth.