不同无性系杜仲含胶细胞密度的动态研究

文章通过对不同无性系杜仲叶中含胶细胞密度的测量,对其生长动态作了分析研究,结论如下:不同无性系含胶细胞的密度在七月中旬达到最大;在同一引种地的雌雄株之间,雄株含胶细胞的密度不完全小于雌株。     

补充维生素D预防骨折——随机对照试验汇总分析

背景：对于脊椎以外的骨折而言，补充口服维生素D的预防作用和用量仍无定论。 目的：评估补充维生素D在预防老年髋骨骨折和非脊椎骨折方面的效果。 数据来源：使用MEDLINE、Cochrance对照试验记录（1960～2005年）以及EMBASE（1991-2005年），对英文和非英文文章进行系统回顾。通过与临床专家接触，通过检索美国社会骨和骨矿研究协会提供的参考文献和摘要（1995～2004年）．进一步寻找更多的研究。检索词包括随机对照试验（randomized controlled trial，RCT）、临床对照试验、随机分配、双盲法、维生素D3、维生素D2；25-羟基维生素D、骨折、人类、老年、摔倒和骨密度。 研究选取：纳入的研究仅限于口服补充维生素D（维生素D3、维生素D2、补钙或不补钙）与补钙或安慰剂比较的双盲RCTs。试验于检查髋部骨折或非脊椎骨折的老年人（年龄≥60岁）中进行。数据提取：两位作者根据预先规定独立提取相关数据，其中包括研究质量指标。 数据综合：所有的汇总分析均以随机效应模型为基础。5项有关髋部骨折的RCTs（n=9294）和7项有关非脊椎骨折危险的RCTs（n=9820）符合我们的纳入标准。所有试验均使用了维生素D3。对髋部和非脊椎骨折预防研究的异质性亦进行观察，用低剂量（400IU／d）和高剂量（700～800IU／d）分别合并RCTs后异质性消失。与补钙或安慰剂相比，每天服700～800IU的维生素D可使髋部骨折的相对危险（relative risk，aa）下降26％（3项RCTs共计5572人；RR，0．74；95％可信区间[confidence interval，CI]，0．61～0．88），使非脊椎骨折的相对危险下降23％（5项RCTs共计6098人；RR，0．77；95％CI，0．68～0．87）。每天服400IU的维生素D（2项RCTs共计3722人；髋部骨折RR，1．15；95％CI，0．88～1．50；非脊椎骨折RR，1．03；95％CI，0．86—1．24）未见明显获益。 结论：口服补充维生素D（700～800IU／d）可以降低尚能活动的老人或慈善机构收容的老年人发生髋部骨折和脊椎以外骨折的危险，每天口服400IU维生素D并不足以预防骨折。     

广东高校贫困大学生心理健康状况调查与思考

目的了解广东高校贫困生心理健康状况并提出相应建议。方法用康奈尔医学指数（CMI）及社会支持评定量表，对广东省5所高校500名学生进行了问卷调查，并采用SPSS11．0进行相关统计和分析。结果贫困大学生的心理健康状况在某些方面存在不足，在性别、地域来源等有差异。结论高校应重视贫困大学生的心理健康状况，加强情感引导，尤其不能忽视对女贫困大学生的关注和帮助。     

Interdisciplinary approach to abdominal Burkitt’s lymphoma

Burkitt’s lymphoma is a high-grade, rapidly growing B-cell neoplasm. It is recognized by its aggressive course, brief median survival, and low rates of long-term survival. The authors discuss the case of a patient who acutely presented with intraabdominal complications from a new onset of Burkitt’s lymphoma. The clinical and pathological features, staging, treatment options, and survival data are reviewed. In addition, the role of surgical intervention is carefully analyzed.     

Pulmonary Lophomonas blattarum infection in patients with kidney allograft transplantation

The aim of the study was to analyse the clinical manifestation and management of pulmonary Lophomonas blattarum infection in four allograft transplantation recipients retrospectively. Four patients with pulmonary L. blattarum infection were diagnosed by using Fiberoptic bronchoscopy (FOB) and bronchoalveolar lavage (BAL) examination. Their clinical manifestation and management are summarized. Four cases of pulmonary L. blattarum were found during the period from the second month to the third month after transplantation. Concurring infection by other pathogens was found in three of them. Common initial symptoms included fever (>38 degrees C) without cough and breathlessness. Lower lobe shadowing could be found on chest X-ray. Body temperature decreased to the normal range in three patients and to 37.5 degrees C in the other one, after intravenous injection of metronidazole and tapering immunosuppressant. Radiological examination confirmed improved health condition of the patients afterwards. Two patients received repeated FOB and only dead L. blattarum was found. Pulmonary L. blattarum infection in allograft transplant recipients carry relatively obscure initial symptoms. Possible L. blattarum infection needs to be screened in post-transplantation pulmonary infection patients with similar symptoms, especially in those who respond poorly to anti-infection treatment. Microscopic examination of BAL fluid can help to identify pulmonary L. blattarum infection and metronidazole is an ideal treatment choice.     

人脑星形细胞肿瘤中FHIT、PCNA蛋白表达关系的研究

目的研究人脑星形细胞肿瘤中FHIT、PCNA蛋白的差异表达，探讨它们与病理分级之间的关系。方法应用免疫组化SP法检测了50例星形细胞肿瘤中不同级别的FHIT、PCNA蛋白的表达水平，以10例非肿瘤脑组织作对照。结果非肿瘤脑组织FHIT、PCNA蛋白阳性表达率分别为100％，0％，星形细胞肿瘤中FHIT、PCNA蛋白阳性表达率分别为40％，86％；尽管在星形细胞肿瘤中FHIT、PCNA蛋白表达总体差异有统计学意义（P〈0．05），但Ⅲ级与Ⅳ级比较差异无统计学意义（P〉0．05）；经统计学分析FHIT、PCNA蛋白呈显著负相关（P〈0．01）。结论FHIT、PCNA蛋白的表达可能与星形细胞肿瘤的恶性程度有关，星形细胞肿瘤中FHIT、PCNA蛋白表达之间的显著负相关，提示FHIT蛋白可能对细胞增殖具有负性调控作用。     

运用直观教学法提高学生对知识的感知

课堂讲授是高校班级授课的基本形式,在课堂讲授中起主导作用,占重要地位[1]。近年来随着高等护理教育的发展,越来越多的临床护士担任起了本科护理系的临床教学任务。而临床护士非专业教师,在教学过程中需要掌握一些教学方法与技巧,才能提高课堂讲授质量。心理学研究表明,直观是     

Evaluation of mandibular block using a standardized method.

The purpose of this prospective randomized study was to investigate the manifestations and efficiency of mandibular block (MB) using a standardized method. In this study, 123 patients requiring MB were randomly assigned to receive MB using a repeated measures design. Mandibular block was administered in each patient by using 2.1 mL of 2% lidocaine with 1:100 000 epinephrine for the inferior alveolar nerve, lingual nerve, and/or buccal nerve. Clinical parameters including the electric pulp test and test for soft tissue sensation using a sharp dental explorer were assessed on both the operated side and contralateral side before and 5, 10, and 15 minutes after injection, and at the end of surgical procedure. Results of the test of the contralateral tooth served as the control group. No response to the electric pulp test at a maximum output (80 readings) was used as the criterion for pulpal anesthesia. Results obtained with electric pulp test and sharp explorer test were not significantly different during various intervals on the contralateral side, indicating the reliability of this standardized method for assessing MB. The MB technique achieved a high rate of subjective numbness (100%) according to the perception of the patients of overall numbness and lip numbness. Overall anesthetic success rates of pulpal anesthesia were 5.7% for the central incisor, 38.2% for the canine, 55.3% for the first premolar, and 90.2% for the first molar. No significant difference was found in the efficiency of anesthesia related to sex or age of the patients. A slower onset of pulpal anesthesia after MB was found for the anterior teeth than for the posterior teeth. This study suggests that the use of a standardized method might produce a clearer and more comprehensive evaluation of the efficiency and manifestations of MB.     

医药企业对电子商务营销模式的科学选择

根据电子商务在我国快速发展的形势，分析我国医药企业可选择的电子商务应用模式，研究企业进行模式选择时所需要考虑的因素，提醒医药企业选择电子商务模式时应依据自身特点积极稳妥地决策，切忌盲目一哄而上。