氢氧焰燃烧合成纳米SnO2/TiO2复合颗粒的形貌与结构

利用预混合氢氧焰燃烧合成了形态和结构不同的SnO2／TiO2复合纳米颗粒，颗粒呈多面体结构，形貌介于球形和立方方形之间，复合颗粒由同为四方晶系的SnO2和TiO2组成。在SnO2／TiO2复合颗粒中存在Sn—O—Ti键，没有出现相分离现象。复合颗粒表面的Ti：Sn(mol：mol，下同)比大于复合颗粒内部的Ti：Sn，而且复合颗粒内部Ti：Sn接近理论值。     

珍珠组成与结构的研究

利用现代测试技术对人工淡水养殖珍珠进行了红外光谱、X射线衍射、光学显微镜和扫描电子显微分析,以了解珍珠的化学组成和矿物组成及其内部晶粒形貌、晶粒尺寸和排列方式对珍珠光泽的影响,同时还在扫描电子显微镜下观察了珍珠的表面形貌特征。     

白芷生态环境和土壤理化特性的研究

本文通过白芷道地产区的生态环境及土壤调查研究，并结合室内的分析测试，对白芷的生态环境、白芷土壤的成土母质、剖面特征、理化特性（容重、质地、颗粒组成；pH、碳酸钙、有机质、交换性、养分）进行了研究。     

一次氧气对氢氧焰水解制备纳米TiO2颗粒的影响

在氢氧焰燃烧合成细米TiO2时,一次氧气浓度直接影响燃烧过程性质、火焰的特征。通过调节一次氧气浓度,可以得到大小、形貌和晶型不同的纳米颗粒。在未达到化学计量比以前,φO2增加,二氧化钛一次粒子的粒度减小,粒度分布变窄,颗粒中的金红石含量显著下降。当四氯化钛进料浓度为0.47mol/m3,φO2由0增加到0.10时,纳米TiO2颗粒平均粒径由70nm降到32nm,金红石的质量分数由0.93降到0.03。水解制备的TiO2颗粒为球形。     

乙型肝炎病毒致病机制的研究现状

乙型肝炎病毒（hepatitis B virus，HBV）属嗜肝DNA病毒科原型，为环状部分双链DNA病毒，呈球状．完整的HBV颗粒的直径为42nm，由蛋白质包膜及核心颗粒组成，其中包膜主要由脂多糖蛋白构成，核心颗粒以蛋白质包膜包裹，组成完整的病毒体．HBV具有感染性，可引起各种急、慢性病毒性肝炎及肝硬化等疾病，     

应用粉煤灰和废酸生产净水剂-聚合氯化铝的实验研究

目的 将粉煤灰和废酸这两种废弃物和有害物加以综合利用，变废为宝。方法 将粉煤灰经振动筛分后再高温焙烧，经二次酸浸进行酸液反应后过滤，滤液进入聚合釜聚合，聚合后的产品可直接使用，亦可浓缩成胶体产品。二次酸浸后的滤渣再经一次酸浸继续溶解有效成分，滤液返回二次酸浸；废酸配至合适的浓度进一次酸浸，部分废酸补充到二次酸浸。结果 用本法生产的净水剂对高浊度、高色度废水混凝处理效果好，水温低时仍可保持稳定的混凝作用，矾花形成快，颗粒大而沉重，沉淀性能好，适宜的PH值范围较宽，过量投加时也不会造成水浑浊的反效果。结论 用粉煤灰和废酸作原料生产净水剂-聚合氯化铝，既可节省原料又实现了废物的综合利用、避免了环境污染和扰民问题，从而达到了环境效益、社会效益、经济效益三者的统一。     

当归微波提取物相对分子质量的分布特征研究

目的 应用提取物相对分子质量的分布特征研究微波强化植物材料溶剂提取机制.方法 采用超滤膜和原子力显微镜对比分析传统回流和微波辅助提取对当归浸出物相对分子质量分布和形貌的影响.结果 浸出物总量基本相同,对于相对分子质量小于3.0×104段内浸出物质量占总浸出物质量的比率,微波辅助提取比传统回流提取约增加24%,对于浸出物颗粒形态特征,二者均呈不规则岛屿状聚集体,传统回流为微波辅助提取所得颗粒高度的2倍.结论 微波对高分子化合物起到分散作用,可以改变浸出物相对分子质量分布特征,在促进有效成分的快速浸出方面显著优于传统回流工艺.     

矸石山爆炸后创伤性应激障碍的研究

目的了解矸石山爆炸后应激障碍的发生情况和影响因素。方法根据DSM—IV中创伤后应激障碍的诊断标准，对70例曾经经历矸石山爆炸救护人员进行诊断，按有无创伤后应激障碍分为患者组和对照组，虚用SCL-90及EPQ进行评定和比较。结果70例经历过矸石山爆炸事故，其中15例（21．4％）符合创伤后应激障碍的诊断，同正常组相比，患者组SCL-90各因子分显著增高（P〈0．05）；艾克森个性问卷内外向分显著降低（P〈0．05），神经质分显著增高（P〈0．05）结论经历矸石山爆炸的救护人员是创伤后应激障碍的高危人群，创伤后应激障碍的发生可能和个性特征相关，应及时有效的进行心理干预，避免不良的心理影响。     

四种烤瓷合金烤瓷/抛光前后表面成分及微观结构分析

目的探讨临床烤瓷／抛光工序对4种常用烤瓷合金（3种非贵金属Ni—Cr、Ni—Cr-Ti、Co—Cr合金和1种高贵Au合金）表面元素组成及微观结构的影响机理。方法模拟临床合金铸造及烤瓷／抛光过程。借助场发射扫描电镜（EFSEM）和X射线能谱仪（EDS），观察合金表面形貌和元素组成。结果烤瓷／抛光后，4种合金表面元素组成存在波动，表面氧组成增多，差别显著；NiCr合金Cr、Mo、Al减少；CoCr合金Co、V减少，W增加；Au合金Pd增加。非贵金属Ni—Cr、M—Cr-Ti合金共晶相、Co—Cr合金富Nb、Mo相形貌有变化趋势。结论临床烤瓷修复体制作过程能够影响合金的表面组分和微观结构。但改变较小。     

肿瘤早期免疫诊断标志物的研究进展和展望

人体血清中自身抗体的检测可作为自身免疫性疾病诊断的重要指标已在临床研究和实践中广泛应用[1]。自身抗体也被用于筛选cDNA基因表达文库，从而分离靶抗原的cDNA克隆。人体血清中的自身抗体是针对某些亚细胞颗粒的组成成分产生的，而这些亚细胞颗粒的组成成分又涉及DNA复制、DNA转录、RNA合成和细胞分裂等重要的细胞功能。     

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.     

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.     

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.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.