首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   270篇
  免费   18篇
儿科学   16篇
妇产科学   21篇
基础医学   29篇
口腔科学   11篇
临床医学   18篇
内科学   57篇
皮肤病学   5篇
神经病学   21篇
特种医学   2篇
外科学   17篇
综合类   12篇
预防医学   15篇
眼科学   15篇
药学   42篇
中国医学   1篇
肿瘤学   6篇
  2023年   1篇
  2022年   9篇
  2021年   17篇
  2020年   11篇
  2019年   7篇
  2018年   15篇
  2017年   8篇
  2016年   8篇
  2015年   13篇
  2014年   16篇
  2013年   23篇
  2012年   26篇
  2011年   19篇
  2010年   12篇
  2009年   9篇
  2008年   16篇
  2007年   15篇
  2006年   15篇
  2005年   7篇
  2004年   11篇
  2003年   8篇
  2002年   8篇
  1999年   1篇
  1998年   2篇
  1997年   1篇
  1996年   1篇
  1993年   2篇
  1992年   2篇
  1991年   2篇
  1984年   1篇
  1978年   1篇
  1975年   1篇
排序方式: 共有288条查询结果,搜索用时 0 毫秒
51.
Study ObjectiveAdult women with endometriosis are often diagnosed with comorbid pain, mood, and autoimmune conditions. This study aims to describe the occurrence of pain syndromes, mood conditions, and asthma in adolescents and young women with endometriosis evaluated at our medical center.DesignRetrospective review of medical records.SettingDepartment of Obstetrics and Gynecology at a tertiary referral center.Participants138 adolescents/young women who were less than age 24 years at the time of their initial visit at our medical center, and whose surgical diagnosis of endometriosis was made at our institution or by outside institutions by the age of 21.InterventionsNone.Main Outcome MeasuresPrevalence of comorbid pain syndromes (defined as interstitial cystitis, irritable bowel syndrome, chronic headaches, chronic low back pain, vulvodynia, fibromyalgia, temporomandibular joint disease, and chronic fatigue syndrome), mood conditions (defined as depression and anxiety), and asthma.ResultsComorbid pain syndromes were found in 77 (56%) women, mood conditions in 66 (48%) women, and asthma in 31 (26%) women. Comparing endometriosis patients with and without comorbid pain syndromes, no differences were found in age at time of diagnosis, endometriosis symptoms, and endometriosis stage. Patients with comorbid pain syndromes were more likely to report mood conditions (62% vs 30% respectively, P < .001) and smoking (31% vs 10% respectively, P = .003), underwent more surgeries for endometriosis (median of 2 [range, 1–7] vs 1 [range, 1-5], P < .005), and were more likely to undergo appendectomy or cholecystectomy (30% vs 13%, P = .02).ConclusionsComorbid pain syndromes, mood conditions and asthma are common in adolescents and young women with endometriosis.  相似文献   
52.
53.
54.
Fifteen different plants representing different species, genera and families were used to test the effect of their aqueous extracts on tumor inhibition with a rapid, inexpensive, safe, animal sparing technique, and statistically reliable prescreen for in vivo murine leukemia antitumor activity, which is known as potato disc technique. The inoculum used contains the extract with the bacterium (Agrobacterium tumefaciens) that was known to cause crown gall tumor to different plant species especially dicotyledons and some gymnosperms. After 12 to 21 days of incubation the tumors appeared and were counted, and the maximum inhibition was then calculated. Thirteen species out of fifteen showed a good antitumor effect, and three of them showed a maximum inhibition of 80%. More experiments are necessary to determine the exact mechanism of action.  相似文献   
55.
Sixty patients were studied in a randomized, double-blind manner to determine whether metoclopramide added to droperidol decreased further the incidence of emetic symptoms (nausea, retching, vomiting) in outpatients receiving alfentanil anaesthesia for nasal surgery. Group 1 (n = 30) received metoclopramide 0.15 mg.kg-1 and Group 2 (n = 30) received placebo. In addition, both groups received droperidol 0.02 mg.kg-1 immediately before anaesthesia which was supplemented by alfentanil 20 micrograms.kg-1 at induction followed by an infusion of 0.25-1 micrograms.kg-1.min-1. Emetic symptoms were assessed 0-3 hr, 3-6 hr and 6-24 hr after surgery. Both groups received similar doses of alfentanil (mean +/- SD; Group 1 4641 +/- 1894 micrograms, Group 2 4714 +/- 1640 micrograms). The percentage of patients who had either nausea or vomiting at 0-3, 3-6 or 6-24 hr was 23%, 14% and 13% in Group 1; and 20%, 17% and 10% in Group 2. The overall incidence for each group was 8/30 (27%). There was no difference in the incidence of emetic symptoms between the groups at any time interval or throughout the study. Metoclopramide did not improve upon the antiemesis of droperidol during alfentanil anaesthesia for outpatient nasal surgery.  相似文献   
56.
The present study aimed to prepare cellulose-based biodegradable hydrogel that revealing a potential control of drug release. To achieve this purpose, activation of cellulose was achieved firstly by pretreatment stage using ZnCl2. Then, selective oxidation of activated cellulose was performed by using sodium periodate to achieve cleavage of the bond between C2 – C3 in the glucose unit generating two active aldehyde groups. The modified cellulose (Dialdehyde cellulose, DAC) was reacted with chitosan, in different molar ratios, via condensation between aldehyde and primary amine groups situated onto cellulose and chitosan, respectively. The activated cellulose, DAC, and produced hydrogels were characterized via FTIR, XRD, and SEM to detect the emerging functional groups as well as the variation of crystallinity and surface morphology features of activated cellulose, DAC, and hydrogels. The swelling capacities of hydrogels showed the optimum value at pH = 7.0. The prepared hydrogels cytotoxicity was investigated toward normal skin fibroblast by MTT assay. It was found that the cells treated with chitosan/DAC hydrogels with ratio 1:1, 1:2, and 1:3 affected by 1.3, 1.8, and 0%, respectively. Streptomycin was incorporated in the prepared hydrogels and its release was evaluated. The DAC ratio was played a key role in controlling the release process. Moreover, further studies were carried out on chitosan (PDB: 2RVA) to evaluate its potential interaction with DAC and streptomycin with binding energies ?4.4 and - 4.3 kcal/mol with short bond lengths 1.3 and 1.944 Å, respectively.  相似文献   
57.
58.
59.
60.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号