气隙式气敏电极的制备及性能

一种基于酸碱平衡的气隙式气敏电极,用标准玻璃磨口件及平头pH电极改制,性能优良,制作简便。用作氨电极时(以0.02mol/L NH_4Cl为中介液),测得NH_4Cl浓度在1×10~(-4)～1×10~(-1)mol/L,电极线性良好,30℃时斜率为56mV/PX;当用作二氧化碳电极时(以0.02mol/L NaHCO_3为中介液),测得NaHCO_3浓度在5×10~(-3)～5×10~(-2)mol/L,电极线性良好,级差为1.04pH。     

莲子心钙拮抗活性成分的研究

以~3H-硫氮酮受体结合分析法为指标,从中药莲子心Nelumbo nucifera Gaertn中分离得到五个生物碱单体,经光谱分析鉴定其结构为甲基莲心碱(neferine)、莲心碱(liensinine)、异莲心碱(isoliensinine)、S-N-甲基异乌药碱(S-N-methyl isococlaurine)及dl-杏黄罂粟碱(dl-armepavine),后二个化合物首次从莲子心中分离,钙拮抗活性:甲基莲心碱IC_(50)1.1×10~(-7) mol/L,莲心碱2.6×10~(-7)mol/L,S-N-甲基异乌药碱2.9×10~(-8)mol/L。     

马来酰肼的示波极谱法测定

在0.2mol/L LiCl 底液中,用示波极谱法一次导数或二次导数测定马来酰肼,产生一个清晰的阴极波。峰电位为-1.95伏(Vs SCE)。当马来酰肼浓度为1.0×10~(-4)～2.0×10~(-5)mol/L 和1.0×10~(-5)～4.0×10~(-6)mol/L 时(PH5.6～9.3),均与峰电流呈良好的线性关系。检出限量为2.0×10~(-6)mol/L。各种方法间的误差,其相对偏差小于0.3%。作者认为,本研究为测定马来酰肼的纯度提供了一种简单、快速、准确的分析方法。     

一种新型组织传感器的研制

作者利用兔胸腺组织作为生物催化材料与氨气敏电极共同组成一种新型的测定体液或组织样品中腺苷浓度的兔胸腺—腺苷生物传感器。此传感器重现性好,CV<5.62％(n=7),线性范围为3.16×10~(-5)～5.62×10~(-3)mol/L,斜率为51.2mV/decade,检测下限为2.99×10~(-5)mol/L,响应时间7分钟,对单磷酸腺苷等14个类似化合物表现出较高的选择性。此传感器制备简便易行,价格低廉,勿需特殊仪器设备。     

北乌头中新的生物碱

从北乌头根中曾经分离得到二萜类生物碱乌头碱,去氧乌头碱,次乌头碱,中乌头碱和北草乌碱。除这些碱外,本文作者从北乌头的地上部分分离到两种新的生物碱Lepenine(1)和Ddenudatine(2)。作者取自然干燥的北乌头地上部分(250g),用甲醇(3×1L)提取,提取物蒸干。残渣用0.5mol/L HCl(100ml)溶解,过滤,调节pH至8.5,滤出的沉淀物经干燥,得0.9g生物碱。混合物进行氧化铝柱层析,以氯仿-甲醇洗脱,逐渐增加甲醇比例。洗出物用TLC检查(氯仿-甲醇-丙酮-氨水42:50:8:5)。R_f值为0.2的洗脱液部分蒸发,残渣用甲醇-丙酮(1:1)重结晶,得到45mg生物碱(1),R_f值为0.25的部分用正已烷-丙酮(1:1)重结晶得到28mg生物碱(2)。     

阿托品敏感场效应传感器的研制和应用

本研究以阿托品-四苯硼酸缔合物为电活性物制成离子敏感膜,涂层于金属氧化物半导体场效应晶体管的栅极引出线(铂丝)上,制成涂丝阿托品敏感场效应传感器。该器件斜率为55mV,线性范围在2.0×10~(-2)～6.3×10~(-5)mol/L,检测下限为1.6×10~(-5)mol/L,pH范围在3.2～8.2。测定了阿托品片剂和注射剂的含量,经t检验,其结果与药典法基本一致。     

气隙式脲酶pH电极的研究

本文报道用自制气隙式气敏电极及脲酶滤纸组成脲酶电极测定血浆中尿素含量,测得标准曲线在5×10~(-4)～5×10~(-2)mol/L范围内线性良好,在17℃时电极级差为0.86,r为0.999;电极性能稳定,测定方法简便,可用作临床分析。     

维生素B_6选择性PVC膜电极研制

本文以自制的以VB_6-硅钨酸离子缔合物为电活性物的PVC膜药物离子选择性电极为待测电极,饱和甘汞电极为参比和内参比电极,用直接电位法测量它在不同浓度VB_6溶液中的E-C关系。在0.1～0.0001mol/L VB_6浓度范围内,电极具有良好的E-lga Nernst线性响应,相关系数达0.9999,斜率51～60mV/decade。研究了PVC膜电极制备过程中活性物和PVC含量对电极性能的影响,并观测了部份干扰物对电极响应的影响,提示电极具有较好的抗干扰能力,选择性系数2×10~(-2)～6×10~(-2)。测量了电极对模拟试样的回收率。     

纳米金修饰玻碳电极测定痕量邻苯二酚

目的:建立纳米金修饰玻碳电极(AuNPs/GC)测定痕量邻苯二酚的新型检测方法.方法:采用循环伏安法研究了邻苯二酚在该电极上的电化学行为.考察了支持电解质的pH、沉积电位对邻苯二酚响应值的影响.结果:AuNPs/GC电极对邻苯二酚有很强的电催化作用.在优化的实验条件下,邻苯二酚的氧化峰电流在1.0×10-6~1.0×10-4 mol/L浓度范围内呈良好的线性关系,相关系数为0.9997,检出限为3.0×10-8 mol/L.相对标准偏差为2.7%(5.0×10-5 mol/L邻苯二酚,n=10).结论:该修饰电极制备简便,具有良好的稳定性,将其用于环境水样中邻苯二酚含量检测结果满意.     

睾丸的绒毛膜促性腺激素受体的放射性配体结合分析

作者建立了大鼠睾丸细胞膜的绒毛膜促性腺激素受体的放射性配体结合分析。睾丸经匀浆、蔗糖密度梯度离心及高速离心制成膜制剂。~(125)I-HCG与膜制剂于30℃反应1小时半,测得膜受体容量为0.36×10~(-12)mol/μg蛋白,K_D值为0.45×10~(-10)mol/L,Hill系数为0.976,k_1为0.41×10~(-3)pmol/min,k_2为2.12×10~(-3)pmol/min。解离图不成直线,分快相和慢相。     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.     

Luo Lingjie's Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.     

Dr.Zhang Ren's Experience in the Acupuncture Treatment of Different Diseases with the Same Therapeutic Principle

Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.