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   326篇
  免费   14篇
  国内免费   1篇
儿科学   28篇
妇产科学   3篇
基础医学   21篇
口腔科学   6篇
临床医学   41篇
内科学   70篇
皮肤病学   23篇
神经病学   24篇
外科学   47篇
综合类   6篇
预防医学   12篇
眼科学   1篇
药学   33篇
中国医学   2篇
肿瘤学   24篇
  2021年   2篇
  2018年   4篇
  2017年   4篇
  2016年   5篇
  2015年   5篇
  2014年   7篇
  2013年   5篇
  2012年   9篇
  2011年   3篇
  2010年   8篇
  2009年   10篇
  2008年   3篇
  2007年   2篇
  2006年   18篇
  2005年   3篇
  2004年   7篇
  2003年   11篇
  2002年   5篇
  2001年   2篇
  1999年   5篇
  1998年   16篇
  1997年   24篇
  1996年   24篇
  1995年   22篇
  1994年   20篇
  1993年   10篇
  1992年   4篇
  1991年   7篇
  1990年   4篇
  1989年   5篇
  1988年   4篇
  1987年   4篇
  1986年   6篇
  1983年   5篇
  1982年   4篇
  1981年   4篇
  1980年   5篇
  1979年   3篇
  1978年   12篇
  1977年   4篇
  1975年   3篇
  1974年   2篇
  1970年   2篇
  1963年   3篇
  1959年   3篇
  1958年   3篇
  1957年   5篇
  1956年   2篇
  1955年   3篇
  1954年   3篇
排序方式: 共有341条查询结果,搜索用时 15 毫秒
71.
Abstract A patient with atypical multiple sclerosis (MS) with clear concentric structure was studied using high field magnetic resonance imaging (MRI). This case was considered to be Balo's concentric sclerosis. Magnetic resonance imaging showed diffuse multiple concentric demyelinating lesions in the bilateral centrum semiovales, which finally regressed with the necrotic lesions remaining when the patient was discharged. During his clinical course, he showed some higher cerebral dysfunctions, such as memory disturbance, constructual apraxia and acalculia. He was treated with glycerin, prednisone and rehabilitation; all of which were effective in his recovery. Over a 4 month period, the patient recoveredclinically, but some intellectual impairment remained.  相似文献   
72.
Abstract We treated a patient who had previously undergone a hepatic resection for ruptured hepatocellular carcinoma (HCC) but developed a solitary peritoneal recurrence at the site of the incision 8 years and 9 months later. Since no other recurrence was evident, we resected the tumour. The primary tumour was 2.5 cm in size and histological examination revealed HCC without any histological risk factors for intrahepatic recurrence. The peritoneal tumour consisted of less differentiated cancer cells than those found in the primary tumour. The positive rates of Ki-67 were 10% in the primary tumour and 23.3% in the peritoneal recurrence. The DNA indexes in both tumours were considered to be identical.
The comparison between the primary and peritoneal tumours suggested that the histological differentiation and proliferation activity can change after recurrence, in spite of consistent DNA ploidy contents. Clinically, a patient who undergoes a hepatic resection for ruptured HCC can survive for a long time, such as 10 years, if they have good liver function and small HCC without any histological risk factors for intrahepatic recurrence. However, since late recurrence is possible, a follow up for as long as 10 years is recommended.  相似文献   
73.
4-month old baby, who developed infective endocarditis of theaortic valve following purulent arthritis of the hip joint,is presented. The baby developed signs of myocardial infarctionand died suddenly at the age of 6 months. Autopsy revealed alocalized healed coronary arteritis, almost certainly due toan infected embolus, as the underlying cause.  相似文献   
74.
A 5 day old girl was transferred to the pediatric ward of Kyushu University Hospital because of papules noted since birth. The papules were distributed on her skin corresponding to the dermatomes innervated by the left Th1-Th3 and the left L1-L3. Varicella-zoster virus antigens were detected in scrapings of incised papules. The diagnosis of herpes zoster was made and acyclovir (ACV) was administered. She responded to ACV well, but she experienced a recurrence twice after discontinuation of ACV. This is the first report of ‘congenital herpes zoster’, which supports the hypothesis that varicella embryopathy is the sequelae of herpes zoster in utero.  相似文献   
75.
BACKGROUND: Haemophilus influenzae is the major cause of otitis media and lower respiratory tract infection in childhood. In the presence of human milk, which contains numerous host defense factors, Haemophilus influenzae may be inhibited in attaching to and colonizing pharyngeal cells. We investigated the incidence of H. influenzae in the throats of 162 healthy infants with different feeding methods: 70 breast-fed, 49 mixed-fed and 43 formula-fed infants. METHODS AND RESULTS: Haemophilus influenzae was identified using standard microbiological procedures and the API NH system. The incidence of H. influenzae in breast-fed infants, mixed-fed infants and formula-fed infants was 0, 0 and 7.0% respectively. CONCLUSION: The results suggest that the colonization of H. influenzae in the throat was inhibited by the presence of breast milk.  相似文献   
76.
紫杉醇聚氰基丙烯酸正丁酯纳米粒制备研究   总被引:1,自引:0,他引:1  
目的 评价紫杉醇聚氰基丙烯酸正丁酯纳米粒(PTX-PBCA-NPs)的不同制备工艺对紫杉醇的包封率和载药量的影响,优选PTX-PBCA-NPs的制备工艺.方法 以包封率和载药量为主要评价指标,分别采用界面缩聚法和乳化聚合法制备PTX-PBCA-NPs,进行对比研究.用正交设计优选处方.结果 界面缩聚法、乳化聚合法制备的PTX-PBCA-NPs的包封率范围均在94.39%~9.23%(n=3)之间,界面缩聚法制备的PIX-PBCA-NP的载药量可达(1.07±0.03)%(n=3),而乳化聚合法制备的PTX-PBCA-NP的载药量可达(0.86:±0.01)%(n=3).用正交试验优选出最佳工艺条件,PTX-PBCA-NPs载药量为0.80%,包封率为95.71%,粒径为235.6nm.结论 两种制备方法制备出来的PTX-PBCA-NPs的包封率符合药典要求.经比较研究,界面缩聚法可能是提高PTX-PBCA-NPs载药量较好的一种制备方法(P<0.05).  相似文献   
77.
The authors, all experienced hospital school teachers in Essex, feel that it is both possible and necessary to educate the profoundly handicapped child, rather than merely mind him. They have devised a basic teaching programme which can be used with the most severely handicapped of the ESN(S) school population.  相似文献   
78.
79.
The fragmented red cell (FRC) is a useful index for diagnosing and determining the severity of thrombotic thrombocytopenic purpura (TTP), thrombotic microangiopathy (TMA) and other similar conditions, as it is found in peripheral blood in patients with these diseases. The FRC expression rate has conventionally been determined by manual methods using smear samples. However, it is difficult to attain accurate quantification by such methods as they are time consuming and prone to a great margin of error. With cases of living donor liver transplantation, the current study examined the possibility of using a multi‐parameter automated hematology analyzer, the XE‐2100 (Sysmex Corporation) for FRC quantification. While there was a notable correlation between the manual and automated measurements, the manual measurement resulted in higher values. This suggested remarkable variations in judgment by individuals. The FRC values had a significant correlation with the reticulocyte count, red blood cell distribution width (RDW), fibrin/fibrinogen degradation products (P‐FDP) and lactate dehydrogenase (LDH) among the test parameters, and this finding was consistent with the clinical progression in patients. The automated method can offer precise measurements in a short time without inter‐observer differences, meeting the requirement for standardization. The determination of FRC count (%) by the XE‐2100 that enables early diagnoses and monitoring of TTP or TMA will be useful in the clinical field.  相似文献   
80.
Aim: Several proteins constituting the slit diaphragm are considered important for maintaining capillary wall permselectivity. Early intervention with blockers of angiotensin II receptors (AR) and mineralocorticoid receptors (MR) is effective against proteinuria in models of chronic hypertensive and protein‐induced renal damage. However, the effects of AR and/or MR blockers in a model of acute nephrotic syndrome remain unknown. The effects of AR and MR blockers were examined in puromycin aminonucleoside (PAN)‐treated rats. Methods: Six week old male Sprague–Dawley (SD) rats were injected with PAN or vehicle and assigned to groups as follows: vehicle (group C); PAN (group P); PAN followed 3 days later by administration of the MR blocker, eplerenone (group MR), and by the AR blocker, losartan (group AR). Blood pressure and urinary protein excretion were measured and all rats were killed for immunohistochemical investigation on day 14 after PAN administration. Results: Blood pressure did not change throughout the study period. Proteinuria was decreased in groups MR and AR compared with group P (on day 14 after PAN administration, respectively; group P vs AR, P < 0.01; group P vs MR, P < 0.05). Nephrin, podocin and podocalyxin staining was preserved in the glomeruli of groups MR and AR compared with group P. Conclusion: The MR and AR blockers decreased proteinuria in the acute model of nephrotic syndrome with preserved expression of glomerular podocyte protein independently of blood pressure.  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