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   82篇
  免费   2篇
儿科学   20篇
妇产科学   1篇
基础医学   2篇
口腔科学   3篇
临床医学   6篇
内科学   31篇
皮肤病学   4篇
神经病学   6篇
特种医学   1篇
外科学   3篇
药学   2篇
肿瘤学   5篇
  2016年   1篇
  2013年   2篇
  2010年   3篇
  2009年   3篇
  2007年   2篇
  2006年   4篇
  2005年   1篇
  2004年   3篇
  2003年   2篇
  2000年   2篇
  1999年   2篇
  1998年   3篇
  1997年   7篇
  1996年   4篇
  1995年   6篇
  1994年   1篇
  1993年   4篇
  1992年   2篇
  1991年   2篇
  1990年   3篇
  1989年   3篇
  1988年   2篇
  1987年   2篇
  1986年   2篇
  1984年   1篇
  1982年   2篇
  1981年   1篇
  1980年   1篇
  1979年   1篇
  1969年   1篇
  1967年   1篇
  1961年   1篇
  1960年   1篇
  1958年   2篇
  1956年   2篇
  1955年   2篇
  1954年   2篇
排序方式: 共有84条查询结果,搜索用时 625 毫秒
1.
Aim: Older residents in Japan requiring rehabilitation often reside in health‐care facilities for the elderly (HCFE) prior to being discharged to home. The return home can be very stressful for both the elder and family caregiver. The purpose of this study was to clarify the differences in plans for home life between the residents of a HCFE who were scheduled for discharge home and their family caregivers. Method: Semistructured interviews were conducted with eight pairs of elders and caregivers. Results: Differences were seen in several areas, including dietary preferences, recognition of the elder’s independence, preconceptions or not knowing about the elder’s pleasurable activities, and the way of care. Conclusions: Differences with regard to enjoyable activities for the elderly arose from a lack of understanding of the lives of the elderly on the part of their families.  相似文献   
2.
3.
4.
A female child with dicentric translocation between chromosome 9 and chromosome 18 presented non-specific minor anomalies with laryngomalacia. Chromosomal analyses were performed by the G-banding method and a fluorescence in situ hybridization (FISH) technique with a specific probe for the centromeric region of chromosome 18 and the painting probe for the chromosomes 9 and 18. Her full karyotype was confirmed as 45, XX, tdic (9;18)(p24;p11). This is the first case of dicentric translocation between chromosomes 9 and 18. The FISH technique is an important tool in chromosome diagnostics.  相似文献   
5.
Abstract Early morphogenetic changes of exencephaly induced by ochratoxin A (OA) were compared with those induced by concanavalin A (Con A) in mice in order to examine possible differences in the pathogenesis of neural tube defect. OA and Con A were administered to pregnant mice on day 7 of gestation, and the process of neural tube closure of embryos was observed at different times from 6 to 72 hours after treatment by SEM and light microscopy. In OA-treated embryos, the cranial neural folds in the fore- and midbrains did not elevate and remained in the biconvex shape. The cellular changes were found in the neuroepithelium and surface ectoderm. Neural crest cells, which appeared at the lateral edges of the neural folds, were also involved in degeneration. In Con A-treated embryos, the neural folds in the mid- and hindbrains elevated to assume the V shape, but remained wide open. The main cellular change was a degeneration of the primary mesenchyme underlying the neuroepithelium, resulting in a paucity of the supporting mesenchymal tissue.
These findings suggest that the exencephalies produced by either OA or Con A are primarily due to non-closure of the neural tube, but that the pathogenesis differs with each agent. Failure of neural tube closure in OA-treated embryos appears to result from damage of the neuroepithelium and neural crest cells, whereas that in Con A-treated embryos from damage of the primary mesenchyme.  相似文献   
6.
ABSTRACT. To investigate whether breast-feeding protects children against rotavirus diarrhea (RVD), we compared rates of breast-feeding by age and enteric pathogens among 2 276 children with diarrhea 0-4 years of age who attended a diarrhea hospital in Bangladesh. Infants 0-5 months were less likely to be breast-fed than children 6-11 months of age suggesting that some protection against diarrhea with all agents was associated with early breast-feeding. In every age group studied, breast-feeding was more common among children with RVD than among children with non-RYD whereas it was less common among children with cholera and shigellosis. Twenty percent of breast milks consumed by infants less than 1 year of age had high levels of neutralizing activity (>320) to the Wa strain of rotavirus but this activity did not appear to be protective since the 30 infants with RVD consumed milk which had titers that did not differ significantly from those consumed by 44 infants with diarrhea of other cause. Despite the prolonged breast-feeding which is common in Bangladesh, the mean age of hospitalization with RYD is approximately the same as in countries where the duration of breastfeeding is quite short. None of these 3 independent observations support a protective role for breast-feeding against rotavirus diarrhea after the first months of life.  相似文献   
7.
Abstract In order to examine the direct effects of cytosine arabinoside (Ara-C) on cerebellar development, Slc:ICR mice were treated intracisternally with a single dose of 160 μ Ara-C on day 0, 1, 2, 4, 5, 7 or 10 after birth. The mice in each group were killed at 30 days of age. Cerebellar weight was heavily reduced, but body and total brain weights were only slightly reduced in all Ara-C-treated groups. In mice treated on day 0, 1 or 2, derangement of the layered structure of the vermis was evident in the anterior folia. In the immunohistochemical examinations with GFAP and S-100 protein, Bergmann glial fibers ran tortuously and not perpendicular to the pia mater in the disarranged area. Bergmann glial cell bodies were scattered in the cerebellar cortex and not always adjacent to Purkinje cells. In the group treated on day 4 or later, the layered structure of the vermis was well preserved.  相似文献   
8.
Measurement of serum HCV-RNA is a useful index for evaluating the antiviral effect of interferon therapy in chronic hepatitis C. In the present study, we investigated whether the detection of hepatic HCV-RNA after interferon treatment, using a polymerase chain reaction assay, predicted long-term response to therapy in patients with chronic hepatitis C. Thirty-three patients underwent liver biopsies before and after interferon therapy. Histology and clinical courses were compared after treatment. Before therapy, serum and hepatic HCV-RNA was detected in specimens from 32 (97%) and 33 (100%) patients, respectively. Serum HCV-RNA became undetectable in samples from 22 (67%) patients; however, in 10 of these patients (45%), serum HCV-RNA levels relapsed after therapy. Hepatic HCV-RNA became undetectable in 14 patients after therapy and the serum aminotransferase concentration remained within normal limits during and following (24–92 weeks) therapy in 12 of these patients (86%). All 11 patients with detectable hepatic HCV-RNA also had serum HCV-RNA and elevated aminotransferase concentrations refractory to therapy. The absence of hepatic HCV-RNA at the end of interferon treatment thus predicted a long-term complete response to therapy with a sensitivity of 100%, a specificity of 90% and an accuracy of 94%. We conclude that hepatic rather than serum HCV-RNA is a more useful index for the prediction of the long-term efficacy of interferon therapy.  相似文献   
9.
Background and objective: Cytomegalovirus (CMV) infection is a life‐threatening condition in patients with diffuse parenchymal lung diseases (DPLDs), who are receiving immunosuppressive therapy. The aim of this study was to describe the clinical features of CMV infection and to propose a strategy for managing CMV infection in patients with DPLD who are receiving immunosuppressive therapy. Methods: A retrospective longitudinal observational study was performed on 69 patients with DPLDs (39 with acute/subacute onset, 30 with chronic onset) who were receiving immunosuppressive therapy and were positive for CMV pp65 antigen (CMV‐pp65Ag) in peripheral blood leukocytes (PBLs). Results: Clinical CMV disease and subclinical CMV antigenaemia developed in 23 and 46 patients, respectively. The cut‐off level of CMV‐pp65Ag indicating clinical CMV disease, as determined by receiver operator characteristic curve analysis, was 7.5 cells per 5 × 104 PBLs. Multivariate analysis revealed that early CMV infection was associated with acute/subacute onset of underlying DPLD and with respiratory dysfunction at the commencement of immunosuppressive therapy. Multivariate analysis also suggested that the acute/subacute onset of underlying DPLD, a CMV‐pp65Ag titre of >7.5 cells per 5 × 104 PBLs, and C‐reactive protein levels ≥10 mg/L indicated a poor prognosis. Conclusions: We recommend that CMV‐pp65Ag antigenaemia of >7.5 cells per 5 × 104 PBLs in patients with DPLD should be treated with ganciclovir. Patients with lower levels of CMV‐pp65Ag antigenaemia should be closely monitored or treated with ganciclovir if the clinical findings suggest a poor prognosis.  相似文献   
10.
Abstract: The Endoscopic resection of gastric tumors following local injections of hypertonic saline-epinephrine solution (ERHSE) was performed on 72 lesions (69 patients) of gastric tumors at Yoyogi Hospital etc. from March, 1983, to December, 1989. These included 40 cases of adenoma, 31 cases of carcinoma, and one carcinoid tumor. The average length of the major axis of the endoscopically resected tumors was 12 ± 9 mm. The curative rate at the first attempt was 94% (64 of 68 lesions). The curative rate of the final procedure was 99% (67 of 68 lesions). This excluded 4 lesions in 3 patients in whom a follow-up examination was not possible. There was no relationship found between the final cure rate and the form and location of the lesions. Fifty four lesions were resected with one session of snare cautery; the average length of their major axis was 9 ± 6mm. The resection of 18 lesions was done piecemeal, and the average length of their major axis was 20 ± 10mm. A statistical significance was noted between the size of the lesions which could be resected with one session of snare cautery and those treated by the piecemeal method, but no difference was noted in the location of lesions for the two groups. The indication for ERHSE was assessed in accordance with the cases that resulted in piecemeal resection, those in which the first ERHSE left residual tumor tissues, and those with perforation. ERHSE could be performed with difficulty on lesions which were (1) on the sharply bending gasric wall, (2) observed only tangentially, (3) inadequately observed. These lesions were situated on the gastric fornix, cardia, and their vicinities, the gastric angulus, posterior wall and greater curvature of the gastric body, and anterior wall and lesser curvature of the middle to the upper gastric body.  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