DAIP改性环氧树脂研究

采用共固化的方法,得到酚醛环氧树脂(F-51)和间苯二甲酸二烯丙基酯(DAIP)的共固化树脂。实验结果表明:DAIP的加入降低了F-51环氧树脂的粘度[体系粘度为150～350mPa·s(25℃)],利于工艺操作;提高了F-51环氧树脂的耐热性,热变形温度达200℃。研究了F-51环氧树脂和DAIP共固化的固化行为、不同配比对共固化物形态结构的影响;并研究了不同配比对固化物耐热性的影响。     

T_(31)环氧树脂固化过程研究——1.动态扭振法确定最佳固化条件

在新设计制造的HLX-1型树脂固化仪上对T_(31)-环氧树脂E51进行了最佳配方和最佳条件的选择。T_(31)含量为20phr的环氧树脂体系,最佳固化温度为333K,固化反应活化能E=52.7KJ/mol。用非平衡态涨落理论也成功地预估了T_(31)-环氧树脂体系的固化行为。     

双酚S/双酚A环氧树脂固化物的相容性研究

采用高分子材料动态力学谱（TBA）和傅立叶变换红外光谱（FTIR）两种方法研究了双酚S／双酚A环氧树脂／芳胺固化体系的固化过程。探讨了在双酚S环氧树脂（BPSER）和双酚A环氧树脂（BPAER）以不同质量比与固化剂4，4'- 二氨基二苯甲烷（DDM）组成固化体系中，所得固化产物的相容性。结果表明，在一个很宽的BPSER／BPAER比例范围，其固化产物具有良好的相容性。     

氨基聚硅氧烷对改性环氧树脂的形态与性能的影响

将带有Ｎ－（β－氨乙基）－γ－氨丙基侧基的聚二甲基硅氧烷与环氧树脂共混，制备了聚硅氧烷改性环氧树脂固化物。研究了氨基聚硅氧烷的氨基含量对改性环氧树脂的形态和性能的影响。结果表明，改性环氧树脂固化物的形态与性能主要依赖于氨基聚硅氧烷的氨基含量，在环氧树脂中引入适宜氨基含量的氨基聚硅氧烷，可在一定程度上降低其模量，提高其柔性，并可明显改善环氧树脂的表面性能。     

含导电炭黑环氧树脂固化过程电测法

用电阻法测定了添加导电炭黑的环氧树脂固化过程。由于载流子是导电炭黑提供的电子,因而体系电阻率大大降低,测量方法得以简化,并使固化过程的测量可以一直进行,从而发现了环氧树脂固化过程存在着两个阶段:第一阶段,反映树脂粘度增加的电阻值上升;第二阶段,反映树脂密度增加的电阻值下降。     

环氧树脂的芳胺室温固化

一、前言环氧树脂在工业和民用乃至文物古迹的修复保护等方面都有广泛和重要的用途。其固化后产物的性能在很大程度上取决于固化剂。通常脂肪族多元胺,能在室温固化双酚A环氧树脂;而芳香族多元胺,却要高温才能实现固化反应。但固化产物的性能,后者往往优于前     

双酚A型环氧改性R-122环氧树脂的研究

用双酚A环氧树脂(E-44)改性脂环类环氧树脂(R-122)，通过对改性R-122环氧树脂力学性能和热性能的测定，探讨了固化工艺，固化荆体系对改性R-122环氧树脂韧性的影响。结果表明：改性R-122环氧树脂冲击强度提高40％，弯曲强度提高75％，断裂能提高81％，而热变形温度和玻璃化转变温度基本不变。R-122树脂基复合材料随E-44的加入冲击强度和弯曲强度分别提高12％和18％。     

环氧化端羧基丁腈橡胶的制备及其对环氧树脂的增韧效果

通过甲酸和双氧水将液体端羧基丁腈橡胶(CTBN)中的双键氧化,制备液体环氧化端羧基丁腈橡胶(ECTBN),并将ECTBN用于环氧树脂增韧改性的研究。详细考察了环氧化反应的影响因素,并确定了最佳的环氧化反应条件。以哌啶为固化剂,分别制备了CTBN/环氧树脂和ECTBN/环氧树脂固化物。用扫描电镜和透射电镜观察了固化物的形态结构,发现CTBN以微米尺寸分散在基体中,而ECTBN则以纳米尺寸分散在基体中。分别对固化物的拉伸性能和冲击性能进行测试,结果表明,ECTBN对环氧树脂具有更好的改性效果。用ECTBN增韧环氧树脂,复合物的冲击强度与CTBN改性复合物相当,明显高于纯树脂;杨氏模量和拉伸强度明显高于CTBN改性复合物;环氧化程度越高,复合物的强度和模量越高。     

FTIR法研究环氧树脂固化反应动力学

用傅里叶红外光谱（ＦＴＩＲ）法研究了双酚Ｓ环氧树脂和甲溴双酚Ａ环氧树脂分别与二胺基二苯砜在恒温条件下的固化反应动力学,得出了各反应的表观活化能。     

耐高温改性环氧树脂粘接剂的制备及改性机理研究

采用新型固化体系和端羧基丁腈橡作为环氧树脂的改性剂，制备了一种具有耐高温、高强度、韧性好等特点的环氧树脂粘接材料。同 时对改性机理及增韧机理进行了初步探讨。     

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.     

Development on Adjustable Calibration Marker for Shock Wave Focus

Shock wave lithotripsy （SWL） is a treatment of choice for upper urinary stones. However, this procedure is inappropriate for obese patients because the focus is often unable to reach the target owing to the limited focal distance in shock wave source. Although treating such patients in a blast path may increase the application length of shock wave source, it＇s difficult to find this path on the lithotripter monitor. For this reason, we invented an adjustable calibration marker in order to set an effective focus in the shock wave hath.     

Study on the TCM Pathogenesis of Angiopathic Complications of Type II Diabetes

Excess production of reactive oxygen species(ROS)of mitochondrion mediated by hyperglycemia is the common pathogenesis of angiopathic complications of diabetes.TCM holds that the damp from the dysfunction of spleen.kidney and liver is the causative factor of complications of diabetes.This is similar to the mechanism of Ros resulting in angiopathic complications of diabetes.When the angiopathic complications of type II diabetes mellitus(T2DM)are difierentiated as caused by turbid damp in TCM can be explained as ROS.Since the obstruction of pathogenic damp in channels and collaterals is said to be the main pathogenesis,the treating principle should be dissolving the damp to remove the obstruction.     

Leptin, Ghrelin and TNF-α before and after Hypo-caloric Traditional Chinese Diet and Auricular Acupuncture

INTRODUCTION Obesity is a complex emergent problem, which can be possibly solved not only by the diet but also by the life style and promotion of a constant physical exercise. 1, 2 No doubt careful attentions must be given to the nutritional condition of obese people, the dietary habits, the somatic build (i.e. distribution of fat mass) and the organic functions linked to formation of the fat mass. All the parameters should be constantly monitored before, during and after a diet treatment. 3, 4, 5     

Relationship between Dysglycemia and Carotid Atherosclerosis in Tibetan Population

People with dysglycemia are at high risk for atherosclerotic diseases. This study aims at investigating the atherosclerotic vascular damage in dysglycemia and its metabolic origin in Tibetan population.     

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.