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301.
W S Costa C A Mandarim de Lacerda J A Bauer 《Gegenbaurs morphologisches Jahrbuch》1988,134(6):949-955
Observations were concentrated on the ultrastructure of perikarya and satellite cells of the otic ganglion of the adult rat. Characteristics of both cell types were morphologically analysed as well as their relationship. Quantitative data concerning the volumetric density were calculated for the following elements of the ganglion: glial cells together (28.5%), unmyelinated fibres (13.4%), myelinated fibres (2.7%), connective tissue (13.6%). This electron microscopic study is a sequence of our previous light microscopic study which determined neuronal densities (COSTA, MANDARIM-DE-LACERDA and BAUER, in press). 相似文献
302.
303.
Upwelling and downwelling at Cabo Frio (Brazil): comparison of biomass and primary production responses 总被引:4,自引:0,他引:4
Gonzalez-Rodriguez Eliane; Valentin Jean Louis; Andre Dalmo Lacerda; Jacob Salvador Abdala 《Journal of plankton research》1992,14(2):289-306
Based on a comparative study of the different phases of upwellingand downwelling, a comprehensive model of average biologicalfeatures at Cabo Frio region was established. For identicalupwelling conditions, biological responses of equal range occur,allowing the establishment of some regional patterns. Thesepatterns are represented by chlorophyll values that range from0.5 to 6.0 mg m3, and primary production ranging from2 to 14 mg C m3 h1. During winter, in the absenceof upwelling, organic detritus constitutes the main energy sourcemaintaining the higher levels of the food web. 相似文献
304.
305.
Tom Rawlinson André Machado Siqueira Gilberto Fontes Renata Paula Lima Beltr?o Wuelton Marcelo Monteiro Marilaine Martins Edson Fidelis Silva-Júnior Maria Paula Gomes Mour?o Bernardino Albuquerque Maria das Gra?as Costa Alecrim Marcus Vinícius Guimar?es Lacerda 《PLoS neglected tropical diseases》2014,8(5)
306.
Denise dos Santos Lacerda Vanessa de Oliveira Castro Marcello Mascarenhas Robson Brum Guerra Caroline Dani Adriana Coitinho Rosane Gomez Cláudia Funchal 《Cell biochemistry and function》2012,30(4):315-319
Organochalcogens are extensively produced and employed by industry and agriculture, and the risk of occupational and environmental toxicity to them has been poorly understood. Here, we investigated the acute effect of a new organochalcogen 3‐methyl‐1‐phenyl‐2‐(phenylseleno)oct‐2‐en‐1‐one on biochemical and hematological parameters in male Wistar rats. The animals were treated with a single intraperitoneal injection of the organochalcogen at doses of 125, 250 or 500 µg·kg–1. After 60 min, the animals were sacrificed by decapitation, and the trunk blood was collected for determination of glucose, triglycerides, cholesterol, alanine aminotransferase (ALT), aspartate aminotransferase, lactate dehydrogenase, urea, creatinine, C‐reactive protein, red blood cells, hematocrit, hemoglobin and white blood cells (WBC). Our results showed a reduction in cholesterol levels in all treated groups, an increase in ALT activity at doses of 250 and 500 µg·kg–1, a decrease of hemoglobin and an increase in WBC in animals that received 250 and 500 µg·kg–1 of the organoselenium. In addition, we observed an increase in neutrophil counts at 125 µg·kg–1 dose and a decrease at 500 µg·kg–1 dose. We also verified an increase in lymphocyte counts at the dose of 500 µg·kg–1. Thus, the present study shows that the acute treatment with this new organochalcogen causes biochemical changes and hematological disorders in male rats. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
307.
Patrícia Oliveira Lacerda Rosana Suemi Tokumaru Selene Siqueira da Cunha Nogueira 《Acta ethologica》2014,17(2):77-81
Social groups of capybaras are stable and cohesive. The species’ vocal communication is complex and mediates social interaction. The click call is emitted in a variety of contexts by animals from all age groups, but differs among groups; its attributed function is to keep contact among animals. To evaluate the presence of individual characteristics in the click call of capybaras, we recorded the vocalizations emitted spontaneously by six adults kept either solitary or in groups. We selected and measured the acoustic parameters of 300 click call phrases, 50 per individual. The parameters were submitted to a discriminant function analysis that revealed a classification accuracy of 76.8 %. A General Linear Model analysis revealed significant differences among the six individuals, and post hoc results showed that differences between a given pair were different from those of any other pair. The acoustic parameters that most contributed to discriminate the individual calls were click interval duration and click duration, suggesting that temporal parameters are more important than frequency parameters for individuals’ discrimination. The findings of individual characteristics in the click calls indicate that these vocalizations can be used as vocal signatures during social interactions. 相似文献
308.
de Lima-Neto Reginaldo Gonçalves Inácio Cícero Pinheiro Costa Ronyllton Brito de Aguiar Cordeiro Rossana Neves Wendell Wons Neves Rejane Pereira Magalhães Oliane Maria Correia Filho Armando Marsden Lacerda de Araújo Paulo Sergio Ramos 《Mycopathologia》2021,186(3):475-475
Mycopathologia - A correction to this paper has been published: https://doi.org/10.1007/s11046-021-00559-9 相似文献
309.
Matheus Lacerda Viana Paulo Eugênio Oliveira Rosana Romero Ana Paula Souza Caetano 《Plant Species Biology》2021,36(3):476-488
Apomixis, the asexual formation of embryos and seeds, occurs in approximately 18% of angiosperm families. Melastomataceae exhibits a remarkable number of apomictic species, distributed among different tribes. This mode of reproduction has been elucidated in Miconieae, but remains unclarified for other groups, such as Microlicieae. Although apomixis has been previously described for Microlicieae species, the cytological basis for this phenomenon is entirely unknown in this group. Thus, populations of Microlicia fasciculata and M. polystemma were used in order to (a) investigate the presence of autonomous apomixis; (b) verify if this mode of reproduction leads to polyembryony; and (c) investigate whether apomixis may occur in parallel with the sexual process. We tested these species for autonomous fruit set and polyembryony, and pollen viability, and analyzed pollen tube growth. Anatomical techniques were used to elucidate the micro- and megasporogenesis and gametogenesis. The species showed autonomous fruit and seed formation and exhibited polyembryony. Apospory and adventitious embryony were the developmental mechanisms of apomixis in M. fasciculata and M. polystemma, respectively. Both species exhibited low pollen viability. However, some viable pollen, reduced embryo sac formation, natural pollination and pollen tube growth enable sexual reproduction and characterize these species as facultative apomicts. The independence of pollinators for fruit set, uniparental reproduction and the possibility of sexual reproduction, confer reproductive assurance and flexibility, bringing together advantages of sexual and asexual reproduction. In this sense, apomixis may have played an important role in the evolution and diversification of Microlicia, a widely distributed genus in the Brazilian Cerrado. 相似文献