微波辐射KF/Al_2O_3催化合成肉桂醛

以KF/Al2 O3为碱性催化剂 ,采用微波辐射催化合成肉桂醛 ,通过正交实验和单因素实验确定最佳反应条件。实验结果表明 :乙醛 0 .2mol,苯甲醛 0 .3 0mol,微波辐射功率 1 60W ,辐射时间 1 1min ,产率可达90 .7%。     

Team-Based Ultrasound Objective Structured Practice Examination (OSPE) in the Anatomy Course

The clinical use of ultrasound has dramatically increased, necessitating early ultrasound education and the development of new tools in ultrasound training and assessment. The goal of this study was to devise a novel low-resource examination that tested the anatomical knowledge and technical skill of early undergraduate medical students in a gross anatomy course. The team-based ultrasound objective structured practice examination (OSPE) was created as a method for assessing practical ultrasound competencies, anatomical knowledge, and non-technical skills such as teamwork and professionalism. The examination utilized a rotation of students through four team roles as they scanned different areas of the body. This station-based examination required four models and four instructors, and tested ultrasound skills in the heart, abdominal vessels, abdominal organs, and neck regions. A Likert scale survey assessed student attitudes toward the examination. Survey data from participants (n = 46) were examined along with OSPE examination grades (n = 52). Mean and standard deviations were calculated for examination items and survey responses. Student grades were high in both technical (96.5%). and professional (96.5%) competencies with structure identification scoring the lowest (93.8%). There were no statistical differences between performances in each of the body regions being scanned. The survey showed that students deemed the examination to be fair and effective. In addition, students agreed that the examination motivated them to practice ultrasound. The team-based OSPE was found to be an efficient and student-favored method for evaluating integrated ultrasound competencies, anatomical knowledge, team-work, and professional attributes.     

微波辐射相转移催化合成苯甲酸苄酯

在实验室条件下,采用微波辐射技术和相转移催化剂,以水为溶剂合成了苯甲酸苄酯。其最佳反应条件是:苯甲酸0.10mol,氯化苄0.20mol,相转移催化剂十六烷基三甲基溴化铵(HDTMAB)5mmol,微波功率800w,微波辐射时间10min,产率达到86.4%。     

有氧运动对非酒精性脂肪性肝病身体成分和肝脏声像图的影响

为探讨有氧运动对非酒精性脂肪性肝病患者身体成分、肝脏声像图的干预效果,本研究将研究对象随机分为运动组和对照组,运动组采用个体化的运动处方进行为期12周有计划、有规律的运动锻炼,对照组不参加特殊运动,观察时间同治疗组.在实验前后分别测试两组研究对象的身体成分和肝脏B超检查.研究结果表明:运动组通过12周健步走有氧运动后,其身体成分指标(体重、体脂肪、体脂百分数、腰臀比、体重指数BMI)较运动前有显著性的下降(P＜0.01);运动组肝脏B超检查结果显示总有效率明显高于对照组,两组相比在统计学上有显著性差异(P＜0.01).实验结论:科学、规律、个体化的健步走有氧运动的实施对非酒精性脂肪性肝病起着积极、有效、重要的防治作用,值得在社区、临床上大力推广应用.     

经阴道超声(二维联合三维)检查对宫腔占位性病变的诊断价值

目的:探讨经阴道超声(二维联合三维)检查对宫腔占位性病变的诊断价值。方法:收集2014年1月~2014年8月在广西中医药大学第一附属医院经阴道超声(二维联合三维)检查、诊断并经手术病理证实的82例宫腔占位病变资料进行回顾性分析。结果:实验组82例,经阴道超声检查结果为:子宫内膜息肉54例,子宫粘膜下肌瘤13例,子宫内膜癌2例,子宫内膜增生过长2例,所有病例都经病理证实,诊断符合率为90.1%。结论:以上四种常见宫腔占位病变经阴道超声检查,其声像图可作为对其诊断和鉴别诊断的重要依据。     

1例经阴道超声诊断双子宫一侧宫腔妊娠报道

子宫发育异常是生殖器官发育异常中最常见的一种,子宫发育异常种类繁多,需要超声仔细观察鉴别,经阴道超声探头频率高,避开肠腔气体及腹壁脂肪的影响,能清晰显示宫腔内孕囊与内膜的关系以及宫腔内膜与宫颈的关系.正确地诊断双子宫畸形并一侧宫腔妊娠,为早孕提供确切的受孕部位,为需要做人工流产术者提供准确信息,减少盲目性.     

苯并咪唑类光致发光化合物的合成及性能研究

以邻苯二胺和2-氯苯甲酸、4-甲氧基苯甲酸、2,6-吡啶二羧酸为原料,在多聚磷酸(PPA)的催化下,用微波辐射法分别合成2-(2-氯苯基)苯并咪唑、2-(4-甲氧基苯基)苯并咪唑和2,6-二(2-苯并咪唑基)吡啶.通过测定熔点、元素分析、红外光谱(IR)、核磁(1HNMR)及紫外光谱(UV)对这三种苯并咪唑类化合物进行了表征,并对合成工艺进行了初步探讨.荧光测试表明,这三种化合物分别在发射波长λ发射=364.0 nm、345.0 nm、376.0 nm处具有较强的蓝色荧光发射.     

微波辐射固载固体酸催化合成柠檬酸三丁酯

采用微波辐射技术，利用颗粒状活性炭固栽对甲苯磺酸作催化剂，由柠檬酸和正丁醇直接酯化合成柠檬酸三丁酯。实验结果最佳反应条件：微波辐射功率为550W，醇酸物质摩尔比为3．9：1，反应时间50min，w（催化剂）=4％，柠檬酸的转化率达95．2％。反应速率明显高于常规加热方式。     

超声波辐射下N-苄基邻苯二甲酰亚胺的合成

在超声波辐射条件下合成了N-苄基邻苯二甲酰亚胺,并且研究了影响反应产率的各种因素。实验得出最佳反应条件为：反应温度80℃,反应时间为30 min,反应产率达到95.3%。产物结构由元素分析、核磁共振氢谱确证。     

不同条件对聚醚砜膜γ辐射接枝甲基丙烯酸接枝率的影响

利用γ射线共辐照技术在聚醚砜膜上接枝了甲基丙烯酸.通过改变溶剂、辐照剂量、辐照剂量率等条件,获得了具有不同接枝率的改性聚醚砜膜,提高接枝率有助于改善聚醚砜膜的亲水性.实验结果表明,提高单体浓度、使用混合溶剂(如水和乙醇按一定比例混合),有利于提高接枝率.研究还发现,超过2 kGy的辐照剂量会导致接枝率降低.