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91.
92.
Antibiotic-phagocyte interaction is an important parameter involved in the elimination process of intracellular bacteria. The aim of the present study was to compare, using the same model, the phagocytic uptake and the intracellular activity of a macrolide and a quinolone. Accumulation of spiramycin and pefloxacin by guinea pig peritoneal macrophages (GPpM) was studied by means of a velocity-gradient centrifugation technique and expression of the ratio of the cellular concentration of antibiotic to the extracellular concentration (IC-EC). Three aspects of Staphylococcus aureus (209-P) phagocytosis were studied: 1) the phagocytic capacity (PC), mean number of ingested cocci by GpPM; 2) the phagocytic activity (PA), percentage of phagocyting GpPM with at least one bacterium; 3) the number of intracellular viable bacteria (IVB). Phagocytic capacity and phagocytic activity were determined by fluorescence microscopy using S. aureus stained with acridine orange. Intracellular viable bacteria were quantified by standard colony counts (CFU). The ratios of intracellular to extracellular concentration of pefloxacin and spiramycin are respectively 9 and 23. Pretreatment of guinea-pig peritoneal macrophages with 10 mg/l of each antibiotic does not modify phagocytic capacity and phagocytic activity, but lead to a decrease of intracellular viable bacteria. S. aureus pretreatment with 1/4 the MIC of each antibiotic increased phagocytic capacity and phagocytic activity and decrease intracellular viable bacteria (especially spiramycin).(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
93.
D. Fontenille M. Traore-Lamizana M. Diallo J. Thonnon J. P. Digoutte H. G. Zeller 《Emerging infectious diseases》1998,4(2):289-293
After an outbreak of Rift Valley fever in Southern Mauritania in 1987, entomologic studies were conducted in a bordering region in Sénégal from 1991 to 1996 to identify the sylvatic vectors of Rift Valley fever virus. The virus was isolated from the floodwater mosquitoes Aedes vexans and Ae. ochraceus. In 1974 and 1983, the virus had been isolated from Ae. dalzieli. Although these vectors differ from the main vectors in East and South Africa, they use the same type of breeding sites and also feed on cattle and sheep. Although enzootic vectors have now been identified in West Africa, the factors causing outbreaks remain unclear. 相似文献
94.
95.
Effects of subinhibitory concentrations of pefloxacin on the adherence of Staphylococcus aureus to human cells 总被引:1,自引:0,他引:1
J F Desnottes N Diallo G Moret R Santonja 《Drugs under experimental and clinical research》1987,13(2):69-73
The adherence of bacterial strains to eukaryotic cells can be influenced by subinhibitory concentrations of antibiotics. The effect of sub- and infra-MICs of pefloxacin, a new broad-spectrum antibacterial quinolone, on the adherence of Staphylococcus aureus to human buccal cells, was studied. Six S. aureus strains belonging to several serotypes and all sensitive to pefloxacin were pretreated with serial twofold dilutions of the drug (from 1/2 to 1/1024 the MIC). After the adhesion test, 100 buccal cells were counted in randomly chosen microscopic fields using a Nomarski interference microscope and attachment was measured as the percentage of cells with at least 50 or more adhering bacteria. Sub-MICs (1/2 and 1/4 the MIC) of pefloxacin increased the diameter of the six staphylococci. All of the strains, grown in the presence of pefloxacin, exhibited a markedly altered capacity for adhesion to buccal cells. The highest significant decrease was observed for 1/2 to 1/8 the MIC, although infra-MICs such as 1/1024 the MIC also decreased the attachment of S. aureus to buccal cells. These results were compared with those obtained with other antibiotics active against S. aureus. 相似文献
96.
Peste des petits ruminants 总被引:5,自引:0,他引:5
P C Lefèvre A Diallo 《Revue scientifique et technique (International Office of Epizootics)》1990,9(4):935-981
The peste des petits ruminants (PPR) is proving to be a disease which has an increasingly significant economic impact on a number of countries in Africa and the Middle East, and possibly also on the Indian sub-continent. The antigenic relationships which exist between the PPR and rinderpest viruses pose problems for diagnosis which complicates rinderpest control and eradication programmes. Progress has recently been made in regard to diagnosis (specific nucleic probes and monoclonal antibodies), as well as control (homologous vaccine). International legislation remains to be established and epidemiological surveys should be conducted in order to determine the exact geographical distribution of the disease. 相似文献
97.
E Pichard D A Diallo M Tulliez J J Floch A N Diallo 《Bulletin de la Societe de pathologie exotique (1990)》1987,80(3):383-389
Destombes, Rosai and Dorfman's sinus histiocytosis (HS) is a rare disease. Many cases have been reported in Africans, particularly in children. Case reported here is the second malian clinical report. Its particularities are difficulties for the histological diagnosis with confusion with Hodgkin's disease, a temporary decrease of adenopathies after vincristine therapy, an eosinophilic infiltrate of lymph nodes and a long evolution during at least 4 years. The pathological physiology of HS remains uncertain. The benign natural course of the disease does not justify employment of chemotherapy. 相似文献
98.
E Pichard A D Diallo H A Traore A N Diallo 《Bulletin de la Societe de pathologie exotique (1990)》1986,79(4):539-541
Paraneoplasic syndromes an unusual cause of eosinophilia in tropical countries. We report a case of major eosinophilia in a black Malian's bronchopulmonary cancer. A decrease of eosinophilia under antineoplastic chemotherapy is noted. Several physiopathologic hypothesis have been propounded in the literature, particularly the secretion by the tumour of a stimulating hormone for the production of eosinophil cells by the bone marrow. 相似文献
99.
E.E.M. Nao A. Tall M. Ndiaye C. Ndiaye M.S. Diouf A. Thiam A.B. Djafarou B.K. Diallo I.C. Ndiaye R. Diouf E.M. Diop 《Annales d'oto-laryngologie et de chirurgie cervico faciale : bulletin de la Société d'oto-laryngologie des h?pitaux de Paris》2009,126(5-6):256-258
ObjectiveTo illustrate the rarity and difficulty diagnosing maxillary sinus neurofibroma through a case report.Patients and methodsA 35-year-old female consulted our department for left cheek swelling evolving over 6 months, upper gum swelling, and a dental occlusion disorder.ResultsA computed tomography scan showed a tumor of the left maxillary sinus with bone destruction. Histological examination of a biopsy fragment found an in situ carcinoma. A maxillary resection was performed to excise the tumor. Histological examination of the specimen showed a neurofibroma. No sign of recurrence was noted after 8 months of follow-up.ConclusionThe difficulty diagnosing maxillary sinus neurofibroma is related to its nonspecific clinical and radiological signs. Consequently, the otorhinolaryngologist must keep this rare histological variety in mind within the range of tumors of the paranasal sinuses. 相似文献
100.
Loisel P Durand MJ Diallo B Vachon B Charpentier N Labelle J 《The Clinical journal of pain》2003,19(2):105-113
BACKGROUND: The causes of prolonged disability due to back pain are multiply determined, involving medical, social, and environmental factors. Possible solutions to the problem of prolonged back pain disability have emerged from recent research but few efforts have been made to transfer evidence-based programs to large community settings. OBJECTIVE: This article describes three phases of the process of transfer of evidence from rehabilitation research to community practice in the province of Quebec. METHODS AND RESULTS: Phase A: Based on literature review and expert knowledge, the Sherbrooke model was developed and assessed through a population-based, randomized clinical trial. Results at 1-year follow-up showed quicker return to regular work and improvement of quality of life; the 6-year follow-up showed the cost-effectiveness of the method. Phase B: Based on the Sherbrooke model experience and recent evidence, a new program addressing the disability paradigm was developed and implemented in the province of Quebec (Canada). Results at 1- and 3-year follow-ups showed that only 24% of workers were not working owing to their musculoskeletal disorder. The program is presently being tested through a population-based, randomized clinical trial in a population of construction workers. Phase C: To implement the program at a provincial level, a network for management, research and education in work rehabilitation was developed. An external assessment is presently planned to evaluate return to work and economic outcomes and quality of implementation of the program in various settings. 相似文献