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941.
Phinitphong Sarichai MSc Songphon Buddhasiri DVM Georgia E. Walters BSc Banyong Khantawa MSc Thattawan Kaewsakhorn DVM PhD Kanittha Chantarasakha BSc Surapun Tepaamorndech PhD Parameth Thiennimitr MD PhD 《Microbiology and immunology》2020,64(10):679-693
Salmonella enterica serovar Typhimurium (S. Typhimurium [STM]) is a leading cause of nontyphoidal salmonellosis (NTS) worldwide. The pathogenesis of NTS has been studied extensively using a streptomycin-pretreated mouse colitis model with the limited numbers of laboratory STM strains. However, the pathogenicity of the clinically isolated STM (STMC) strains endemic in Thailand in mice has not been explored. The aim of this study was to compare the pathogenicity of STMC strains collected from Northern Thailand with the laboratory STM (IR715) in mice. Five STMC isolates were obtained from the stool cultures of patients with acute NTS admitted to Maharaj Nakorn Chiang Mai Hospital in 2016 and 2017. Detection of virulence genes and sequence type (ST) of the strains was performed. Female C57BL/6 mice were pretreated with streptomycin sulfate 1 day prior to oral infection with STM. On Day 4 postinfection, mice were euthanized, and tissues were collected to analyze the bacterial numbers, tissue inflammation, and cecal histopathological score. We found that all five STMC strains are ST34 and conferred the same or reduced pathogenicity compared with that of IR715 in mice. A strain-specific effect of ST34 on mouse gut colonization was also observed. Thailand STM ST34 exhibited a significant attenuated systemic infection in mice possibly due to the lack of spvABC-containing virulence plasmid. 相似文献
942.
Matthieu Manceny Chafika Chettaoui Michel Malo Georgia Barlovatz-Meimon Franck Delaplace 《Comptes rendus biologies》2006,329(12):938
We present a method to model biological systems, the theory of games networks. It extends game theory by multiplying the number of games, and by allowing agents to play several games simultaneously. Some important notions of biological systems, such as locality of interactions and modularity, can then be modelled. To cite this article: M. Manceny et al., C. R. Biologies 329 (2006). 相似文献
943.
Maria Angela M. Marques Marcia Berrêdo-Pinho Thabatta L. S. A. Rosa Venugopal Pujari Robertha M. R. Lemes Leticia M. S. Lery Carlos Adriano M. Silva Ana Carolina R. Guimar?es Georgia C. Atella William H. Wheat Patrick J. Brennan Dean C. Crick John T. Belisle Maria Cristina V. Pessolani 《Journal of bacteriology》2015,197(23):3698-3707
944.
Either citric acid or ascorbic acid (0.23 m final concentration) quickly arrests incorporation of tritiated thymidine or uridine upon addition to cultures of animal cells. The incorporated radioactivity is totally preserved for a day at 37°C without further manipulations. In contrast, radioactivity is extensively lost from cultured cells at 37°C after they are arrested by the conventional method of trichloroacetic acid precipitation following removal of medium and rinsing. The cells arrested with citric or ascorbic acid preserve their morphology and are suitable for autoradiography. The new method has considerable advantages of convenience and accuracy over treatment with trichloroacetic acid. 相似文献
945.
Michel Malo Ccile Charrire-Bertrand Chafika Chettaoui lizabeth Fabre-Guillevin Franois Maquerlot Alexandra Lackmy Benoît Valle Franck Delaplace Georgia Barlovatz-Meimon 《Comptes rendus biologies》2006,329(12):919
Cancer is a complex and dynamic process caused by a cellular dysfunction leading to a whole organ or even organism vital perturbation. To better understand this process, we need to study each one of the levels involved, which allows the scale change, and to integrate this knowledge. A matricellular protein, PAI-1, is able to induce in vitro cell behaviour modifications, morphological changes, and to promote cell migration. PAI-1 influences the mesenchymo-amaeboid transition. This matricellular protein should be considered as a potential ‘launcher’ of the metastatic process acting at the molecular, cellular, tissular levels and, as a consequence, at the organism's level. To cite this article: M. Malo et al., C. R. Biologies 329 (2006). 相似文献
946.
Luiz Fernando Ferreira Mario Aguiar Georgia Pompeu Tâmara Guido Messias Regina Rosim Monteiro 《World journal of microbiology & biotechnology》2010,26(9):1613-1621
Vinasse is a highly colored effluent with a high pollutant potential when disposed in the environment. Assays for decolorization
of vinasse were performed, selecting the fungus Pleurotus sajor-caju CCB 020. The discoloration was cocominant with the increase of the activities of laccase, manganese-peroxidase and peroxidases.
P. sajor-caju demonstrated a rise in biomass production (1.06 g 100 ml−1), and the enzyme activities such as laccase (varying from 400 to 450 IU l−1) reached between the 9th and 10th day of growth and for MnP at the 12th day of cultivation (varying from 60 to 100 IU l−1). It was concluded that the system P. sajor-caju/vinasse can be utilized as a bioprocess for color removal and degradation of complex vinasse compounds. It was observed an
improvement in the characteristics and detoxification allowing its utilization as reused water, laccase and manganese-peroxidase
enzymes production and for fungal biomass production with a high nutritional value. 相似文献