低温固化导电银浆的流变性研究

研究了气相二氧化硅、聚酰胺蜡粉、改性聚脲3种不同流变助剂对银浆性能的影响,通过应力扫描、频率扫描、印刷模拟等振荡剪切动态扫描,分析了不同流变助剂对银浆流变性的影响,并建立了银浆流变性与印刷性之间的联系。结果表明,随着改性聚脲用量的增加,浆料内部的氢键增多,形成的立体交联网络的粒子间相互作用力增强,导致黏度上升,屈服应力增大,损耗角下降,恢复速度加快。当改性聚脲用量(质量分数)为1.5%时银浆印制的导电膜层扩散小、轮廓清晰、分布均匀、线型良好。     

银粉玻璃离子和银汞合金牙体充填疗效的对比观察

目的　探讨银粉玻璃离子和银汞合金在牙体充填中的临床效果。方法　将 4 5 9颗牙齿随机分成两组 ,进行了为期 2年的随诊观察。结果　银粉玻璃离子具有高抗压强度、较强粘结力和良好的边缘密合性(P <0 0 5 ) ,并且无毒无污染。结论　银粉玻璃离子临床效果优于银汞合金 ,可作为银汞合金的替代材料     

银粉玻璃离子牙体充填洞壁密合度的电镜研究

目的：为银粉玻璃离子替代银汞合金提供了理论依据。方法：用颈部龋坏的离体牙30颗,去腐备洞,用银粉玻璃离子充填。用扫描电镜测量充填体与窝洞壁间微缝隙间的宽度,并观察充填体-牙体界面的形态。结果：发现银粉玻璃离子的边缘密切性较好,从理论上验证银粉玻璃离子的优良性能。结论：银粉玻璃离子可以替代银汞合金。     

丙烯酸树脂活化银胶的制备、结构与性能

以丙烯酸树脂和环氧树脂的混合物为基体,以银粉为填料,制备活化银胶。将银胶涂覆于聚对苯二甲酸乙二酯（PET）基材上,形成导电涂层,考察了涂层的可催化化学镀铜特性以及涂层与基材的结合力;同时考察了丙烯酸树脂与环氧树脂的质量比对活化胶的交联度、剥离强度、胶层可镀性的影响,基体的镀液渗透性与胶层可镀性的关系,以及活化胶中银粉含量和分散性、胶层干燥固化过程中的分散稳定性对活化胶性能的影响。结果表明：当活化胶交联度为59.8%、银粉与树脂的质量比为2∶1时,胶层具有良好的镀液渗透性,此时胶层可镀性好,并具有较高的剥离强度。     

不同超声分型的肉芽肿性乳腺炎影像学特征分析

目的 比较不同超声分型肉芽肿性乳腺炎的超声与X线图像特征差异。方法 回顾性分析2017年10月至2021年10月在安徽医科大学附属滁州医院甲乳外科/普外科就诊的52例肉芽肿性乳腺炎患者的临床、影像学资料,均经空芯针穿刺或手术病理证实,52例患者均进行超声检查,其中32例同时进行X线检查,根据声像图特征分为片状低回声型、肿块型、脓肿型,根据X线特征分为不对称性局限性致密影、不规则肿块影、局部结构扭曲或索条影,比较超声与X线对肉芽肿性乳腺炎诊断的一致性。结果 肉芽肿性乳腺炎病灶内出现岛屿状回声、周边出现高回声带在片状低回声型与肿块型、片状低回声型与脓肿型比较,差异有统计学意义(P<0.05),肿块型与脓肿型比较,差异无统计学意义(P>0.05)。肉芽肿性乳腺炎的X线特征在各型中比较,差异均无统计学意义(P>0.05)。超声与X线对肉芽肿性乳腺炎的诊断具有较好的一致性(Kappa=0.389,P<0.05)。结论 肉芽肿性乳腺炎的片状低回声型超声特征为岛屿状回声和周围高回声带,各型的X线特征无明显差异,超声与X线对肉芽肿性乳腺炎的诊断具有一致性,可相互验证。     

药物基因多态性检测在脑梗死患者抗血小板治疗中的应用

目的 探究药物基因多态性检测在脑梗死患者抗血小板治疗中的应用前景。方法 选取2019年1月—2020年3月在东莞东华医院就诊的脑梗死患者298例,所有患者发病24 h内给予氯吡格雷联合阿司匹林治疗,收集患者基本信息并检测CYP2C19、PTGS1、GP1BA基因。治疗14 d后,应用改良Rankin量表（mRS）评估患者预后情况,并分为预后良好组和预后不良组。结果 脑梗死患者中快代谢型156例（52.35%）,中间代谢型86例（28.86%）,慢代谢型56例（18.79%）,同时阿司匹林敏感型290例（97.32%）,阿司匹林半敏感型5例（1.68%）,阿司匹林抵抗型3例（1.00%）。预后良好组中快代谢型140例（59.07%）,中间代谢型67例（28.27%）,慢代谢型30例（12.66%）。预后不良组中快代谢型16例（26.23%）,中间代谢型19例（31.15%）,慢代谢型26例（42.62%）,两组比较差异有统计学意义（P <0.05）。预后良好组中阿司匹林敏感型234例（98.74%）,阿司匹林半敏感型2例（0.84%）和阿司匹林抵抗型1例（0.42%）。预后不良组中阿司匹林敏感型56例（91.80%）,阿司匹林半敏感型3例（4.92%）,阿司匹林抵抗型2例（3.28%）,两组比较差异有统计学意义（P <0.05）。结论 CYP2C19、PTGS1、GP1BA基因多态性对脑梗死患者氯吡格雷联合阿司匹林抗血小板治疗预后有影响。检测CYP2C19、PTGS1、GP1BA基因多态性对预测脑梗死患者治疗预后具有指导意义。     

2型糖尿病内脏脂肪面积与肾小球滤过率相关分析

目的 探讨2型糖尿病患者内脏脂肪面积与肾小球滤过率的关系。方法 应用Inbody720人体成分分析仪对120例2型糖尿病患者进行内脏脂肪面积、体脂肪、体脂百分比、骨骼肌等指标测量,同时测量空腹血糖、尿素氮、肌酐、甘油三酯、总胆固醇、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇,计算肾小球滤过率（GFR）,测量身高、体重、腰围、臀围,计算体重指数（BMI）和腰臀比（WHR）,对人体成分参数和肾功能、血脂等指标进行分析。结果 线性相关分析显示GFR与内脏脂肪面积（r=0.233）、体脂肪（r=0.236）、BMI （r=0.366）、WHR （r=0.377）存在相关,差异有统计学意义（P<0.05）;多元线性回归分析显示内脏脂肪面积（β=0.095,P=0.007）是GFR的独立影响因素。结论 2型糖尿病合并内脏型肥胖者肾小球滤过率水平下降,内脏脂肪面积与2型糖尿病患者肾小球滤过率密切相关,是独立影响因素。     

阿霉素化学键接聚合物纳米颗粒的合成及pH敏感释放

合成了前驱体三-(2-氨乙基)-N,N',N"-三硫辛酸氨,该前驱体经三丁基膦(TBUP)还原后得到末端带有6个巯基的小分子单体(C-6SH)并共价偶联腙键修饰的阿霉素-(6-马来酰亚胺基己酰)腙(MAL-DOX)。通过巯基与丙烯酸酯的点击化学反应,以二甲基丙烯酸乙二醇酯(EGDMA)为交联剂,连续投料制备了具有内核交联、表面聚乙二醇(PEG)化与pH敏感药物释放特性的聚合物纳米颗粒。采用动态光散射粒径分析(DLS)和透射电镜(TEM)对纳米颗粒的尺寸和形貌进行表征,结果表明该纳米颗粒呈球形,平均尺寸为42 nm。体外药物释放表明:通过腙键连接阿霉素(DOX)的聚合物纳米颗粒具有良好的pH响应性释放能力,即在酸性条件下(pH=5.5)的释放速率比生理pH环境下要明显加快。     

刺五加GAPDH基因的克隆及序列分析

目的 对刺五加Eleutherococcus senticosus GAPDH基因进行克隆及序列分析,使其成为可用的内参照基因。方法 采用改良的异硫氰酸胍法提取刺五加总RNA,运用RT-PCR法克隆GAPDH基因的部分序列,并以其为内参照基因进行半定量PCR。结果 克隆了长度为627 bp的刺五加GAPDH基因,推测其编码209个氨基酸,与三七、人参、拟南芥的GAPDH氨基酸序列同源性分别为97%、93%、93%,核苷酸同源性分别为94%、86%、84%。其作为内参照基因的半定量PCR具有良好的扩增效果和重现性。结论 首次分离并克隆了刺五加GAPDH cDNA,证实该序列可以作为基因表达分析的内参照基因,为刺五加苷生物合成中关键酶的表达分析及调控机制研究奠定基础。     

AF-HF001对正常大鼠离体心脏的正性肌力及心电作用

采用正常大鼠离体心脏模型,利用Langendorff离体灌流装置考察各浓度AF-HF001对大鼠离体心脏左心室收缩压(LVSP)、左心室舒张末期压(LVEDP)、左心室内压最大上升速率(+dp/dt_max)以及左心室内压最大下降速率(-dp/dt_max)的影响。结果表明:AF-HF001能够剂量依赖性地增强大鼠离体心脏LVSP、LVEDP及左心室最大变化速率,表明AF-HF001可对正常大鼠离体心脏产生正性肌力作用。同时结合分布于心尖、右心室游离壁、主动脉根部的检测电极检测AF-HF001的心电作用,结果显示AF-HF001在各灌流浓度下PR,QRS,QTc及心率等各项心电指标未改变,表明AF-HF001在保证增强心肌收缩力及产生更大心脏搏出量的同时也具备良好的安全性。本研究为AF-HF001的深入开发奠定了良好的基础。     

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…     

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.     

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.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.