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   170篇
  免费   12篇
  国内免费   7篇
儿科学   26篇
基础医学   25篇
口腔科学   4篇
临床医学   22篇
内科学   46篇
皮肤病学   18篇
神经病学   7篇
外科学   15篇
预防医学   1篇
眼科学   1篇
药学   5篇
中国医学   10篇
肿瘤学   9篇
  2017年   1篇
  2016年   5篇
  2015年   5篇
  2014年   1篇
  2013年   4篇
  2012年   4篇
  2011年   3篇
  2010年   7篇
  2009年   12篇
  2007年   6篇
  2006年   2篇
  2005年   8篇
  2004年   1篇
  2002年   3篇
  2001年   4篇
  1999年   6篇
  1998年   16篇
  1997年   9篇
  1996年   9篇
  1995年   21篇
  1994年   12篇
  1993年   9篇
  1992年   6篇
  1991年   2篇
  1990年   1篇
  1987年   1篇
  1986年   4篇
  1984年   3篇
  1982年   1篇
  1981年   1篇
  1980年   2篇
  1979年   5篇
  1978年   2篇
  1967年   2篇
  1965年   1篇
  1959年   2篇
  1958年   1篇
  1957年   2篇
  1956年   3篇
  1955年   2篇
排序方式: 共有189条查询结果,搜索用时 10 毫秒
1.
Background and Aim: Although pretreatment with a sedative drug is effective in relieving pain during esophagogastroduodenoscopy (EGD), such drugs can cause significant side‐effects. The aim of this study was to examine the effect of slow‐wave photic stimulation on discomfort and/or pain felt during EGD. Methods: Forty consecutive patients (25 men and 15 women) who underwent diagnostic EGD in our hospital were included in the study. Twenty patients received photic stimulation for 25 min, and underwent electroencephalographic recording, in addition to the usual premedications. Twenty control patients received the same treatment but without photic stimulation. All patients evaluated the discomfort/pain felt during endoscopy against a five‐grade scale in comparison with what they had experienced in their previous examination. Results: Patients with an improved discomfort/pain score were 18/20 and 3/20 in the treated and control groups, respectively. Overall comparison of pain scores between both groups was significant (P < 0.0001). The proportion of slow‐wave activity recorded in patients’ electroencephalograms significantly increased in the treated group compared to control values (36.6 ± 6.8% vs 29.1 ± 3.4%, P < 0.001). There was a close correlation between the degree of discomfort/pain felt during endoscopy and the proportion of slow‐wave activity (P < 0.001). Conclusion: Slow‐wave photic stimulation shows promise as a treatment for relieving the discomfort and/or pain felt by patients undergoing EGD.  相似文献   
2.
Fluid and protein secretion by the submandibular glands of 25-day-old rats were examined and compared in response to three cholinergic and four peptidergic sialogogues at various doses. All cholinergic and peptidergic agonists used were potent sialogogues for the submandibular glands of the weanling rats over the wide range of doses used. The cholinergic agonists, bethanechol and methacholine and the peptidergic agonists, substance P, substance PTyr8 and eledoisin-related peptide used intravenously, acted similarly to each other on the submandibular glands of the rats, late in the natural weaning period, but carbachol and physalaemin had slightly different effects. Of the peptidergic agonists, physalaemin was the most potent sialogogue among four tachykinins tested at the low dose. The types of protein secreted by the submandibular glands of the weanling rats in response to all sialogogues used here were typical of the β-type. These results indicate that all agonists used could mainly stimulate the acinar cells of the submandibular glands of the weanling rats which have already fully developed functionally at this time.  相似文献   
3.
4.
We report a case of chronic myelogenous leukemia (CML) associatedwith pronounced peripheral lymphadenopathy, with the cells havingthe Philadelphia (Phl) chromosome and T-cell features. A 23-year-oldman who was diagnosed as having CML and treated with busulfanwas admitted to our hospital because of increasing hepatosplenomegalyand pronounced lymphadenopathy. An axillary lymph node biopsydisclosed that the malignant cells formed rosettes with neuraminidase-treatedsheep red blood cells (En) (95.0%) and were positive for Leu1 (91.8%). Of the cytochemical reactions, peroxidase was negativeand periodic acid-Shiff, acid -naphthyl acetate esterase andß-glucuronidase were all positive. The karyotype ofthe bone marrow cells was 46 XY Phl positive (22q–), andthat of the lymph node cells was 51 XY Phl positive +8, +9,+18, +19, +21, 22q–. He was treated with various anti-leukemicagents and irradiation. Despite such treatments, he died ofpneumonia. This is a report of a CML patients with blast crisisand tumor formation characterized by T-cell features.  相似文献   
5.
A case report is presented of a 15-year-old girl with reflex sympathetic dystrophy (RSD). She was referred to hospital because of left upper limb pain. Her left upper limb was cold, edematous and blue with a limited active range of movement. The serum concentration of noradrenaline was lower on the painful side than on the healthy side, and neurotropin, which has an antinociceptive effect to hyperalgesia, was clearly effective. Early diagnosis and management is essential in the treatment of RSD and administration of neurotropin is a useful and non-invasive treatment without severe adverse effects.  相似文献   
6.
白花前胡化学成分研究 Ⅲ   总被引:1,自引:0,他引:1  
目的:研究河南产白花前胡的化学成分.方法:采用色谱法分离化学成分,利用质谱、核磁共振等波谱技术鉴定结构.结果:分离鉴定了7个化合物,分别为α-D-ghcopyranose-1-hexadeeanoate(1),D-mannitol monohexadecanoate(2),腺苷(adenosine,3),丁酸(butyric acid,4),eleutheroside B_1(5),apiosylskimmin(6),甘露醇(mannitol,7).结论:化合物1~5为首次从该植物中分离得到,化合物1,2为首次从伞形科植物中分离得到.  相似文献   
7.
We describe a case of a myocardial infarction, in which prominent ischemic J waves were documented during recurrent ventricular fibrillation attacks. The patient was referred to our hospital to treat an out‐of hospital cardiac arrest. Although the 12‐lead electrocardiogram obtained just after the first cardioversion did not show any apparent J waves, a J wave‐like steep downsloping type ST‐segment elevation associated with q waves in the inferior leads was documented during multiple episodes of ventricular fibrillation. Our report revealed the appearance of J waves as an important marker for lethal arrhythmias in acute ischemia. (PACE 2012; 35:e27–e30)  相似文献   
8.
Psoriatic arthritis (PsA) has many clinical and radiological manifestations but lacks a specific laboratory marker. The aim of the present study was to identify noteworthy features in PsA patients on routine clinical examinations. The subjects were 25 PsA patients who were classified based on the Classification of Psoriatic Arthritis (CASPAR) criteria. The clinical and radiological findings and laboratory parameters were analyzed by retrospective chart review. On clinical examination, dactylitis was present in 13 (52%) of 25 patients, swollen and/or tender Achilles tendons were present in nine (36%), and sacroiliitis was present in eight (32%). Of the radiological features, juxta‐articular new bone formation (JANF) was seen in 12 (48%), extra‐articular new bone formation was seen in nine (36%) and sacroiliitis was seen in six (24%). Dactylitis and JANF had the highest prevalence rates. The Psoriasis Area and Severity Index score, swollen and/or tender joint count, erythrocyte sedimentation rate, C‐reactive protein, and matrix metalloproteinase‐3 were higher in patients with sacroiliitis than in those without sacroiliitis (P < 0.05). Dactylitis, JANF and sacroiliitis may be noteworthy manifestations in Japanese patients with PsA.  相似文献   
9.
A 13 month old boy was found to have severely reduced β-galactocerebrosidase activity suggesting infantile Krabbe disease. Clinically, the patient showed a progressive neurological deterioration with white-matter disease on radiological study. Axillary skin biopsy was performed to support the diagnosis. On electron microscopy, needle-like inclusions, which are the typical finding seen in the cytoplasm of astrocytes and Schwann cells in the classic infantile form, were present in eccrine sweat gland epithelial cells. This method is useful for diagnosis when nerve biopsy and biochemical analysis are not readily available.  相似文献   
10.
目的 :为确认中药白芷的基原植物提供化学成分方面的资料。方法 :运用高效液相及与标准品对照的方法对 4类栽培白芷 (川、杭、祁、禹白芷 )和 3种近缘野生植物 (兴安白芷、台湾白芷、雾灵当归 ) ,以及另外 2种当归属野生植物 (黑水当归、芷叶白芷 )进行了香豆素类成分的比较分析。结果 :4类栽培白芷和 3种近缘野生植物的香豆素类成分无论在化合物种类还是在含量方面都相当近似 ,而与另外 2种当归属野生植物差别较大。结论 :从香豆素类成分特征来看 ,4类栽培白芷和 3种近缘野生植物可分为 3个类群 ,即 :①川、杭、祁、禹 4类白芷和台湾白芷。②兴安白芷。③雾灵当归。台湾白芷与中药白芷更为接近  相似文献   
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