声速法在检测乳化液浓度中的应用     

刘文健  王东  陆全龙  王兵  靳海水 《武汉工程职业技术学院学报》2011,23(2):4-6

分析了乳化液浓度检测技术的发展状况。针对冷轧生产,提出采用超声波声速法检测乳化液浓度技术可行,在此基础上,对武钢冷轧乳化液进行了实验应用研究。  相似文献   

超声吹脱法处理氨氮废水的应用     

陈晓 《南阳师范学院学报》2011,10(6):39-41

针对某炼钒企业废水回用过程中,氨氮不断富集,影响产品质量的问题,采用超声吹脱法对氨氮废水进行处理后,氨氮浓度小于15 mg/L,废水全部回用生产,不外排,消除了环境污染的隐患.  相似文献   

固态合成硬脂酸十八醇酯的研究     

李静  王捷  黄兴才 《许昌学院学报》2011,30(2):95-98

在无溶剂状态下,以十八醇和硬脂酸为原料,以对甲苯磺酸(PTSA)为催化剂,微波协助合成了硬脂酸十八醇酯.利用正交实验法探究了酯化反应的各种影响,其影响因素的大小依次为D>A>C>B;其反应的最优条件:醇酸物质的量比(A)为1∶1.2,催化剂用量(B)为0.2 g,微波辐射功率(C)为514 W,微波辐射时间(D)为40 m in,产率可达94.35%.  相似文献   

微波辐射相转移催化合成苯甲酸苄酯   总被引：2，自引：0，他引：2  

冯亚非  李先文 《天水师范学院学报》2004,24(5):34-35

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%。  相似文献   

Virtual anatomy and point-of-care ultrasonography integration pilot for medical students     

Marcus E. Olivares-Perez  Sally Graglia  Derek J. Harmon  Barbie A. Klein 《Anatomical sciences education》2022,15(3):464-475

  相似文献   

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     

赵卫东  成平  伍业冬 《大众科技》2016,(5):88-89

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。  相似文献   

1例经阴道超声诊断双子宫一侧宫腔妊娠报道     

丁久香 《襄樊职业技术学院学报》2014,(3):44-45

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.  相似文献   

苯并咪唑类光致发光化合物的合成及性能研究     

黄深振  郭应臣  杨林聚 《南阳师范学院学报》2013,(12):28-32

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.  相似文献   

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

Taylor M. Weiskittel  Nirusha Lachman  Anjali Bhagra  Kylie Andersen  Jeff St. Jeor  Wojciech Pawlina 《Anatomical sciences education》2021,14(3):377-384

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.  相似文献   

γ辐射用于草莓保鲜     

徐世红  周加福 《科技通报》1991,7(3):146-149

中国南方,草莓采收季节,草莓当天就要霉烂变质。本文研究了γ辐射对延缓草莓霉变腐烂速度的有效作用,指出了该方法不能改变储藏温度对于草莓保鲜的重要作用,比较了3种不同辐照剂量的不同效果,揭示了在冰箱冷藏条件下,2kGy和3kGy剂量的γ辐照,能使草莓储存保鲜期提高到12d以上。  相似文献