Buscar
Mostrando ítems 121-130 de 501
Tesis Doctoral
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Activities of imipenem and cephalosporins against clonally related strains of Escherichia coli hyperproducing chromosomal β-lactamase and showing altered porin profiles
(American Society for Microbiology, 2000-09-06)
Forty clonally related clinical isolates of Escherichia coli from hospitalized patients were resistant to cefoxitin (MICs, >256 μg/ml) and ceftazidime (MICs, 32 to 256 μg/ml) and were intermediate or resistant to cefotaxime ...
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Roles of β-Lactamases and Porins in Activities of Carbapenems and Cephalosporins against Klebsiella pneumoniae
(American Society for Microbiology, 1999-07-01)
Two clinical isolates of extended-spectrum β-lactamase (ESBL)- producing Klebsiella pneumoniae were noted to be less susceptible than expected to imipenem. Both were missing outer membrane proteins that serve as channels ...
Tesis Doctoral
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Estudio genético de la nodulación de "Rhizobium fredii"
(1993)
En esta tesis se han estudiado diversos aspectos de la nodulación de las estirpes de Rhizobium fredii. Esta especie está constituida por diferentes estirpes que se caracterizan por ser de crecimiento rápido (2 a 4 horas ...
Tesis Doctoral
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Sinorhizobium fredii HH103 RirA is required for oxidative stress resistance and efficient symbiosis with Soybean
(MDPI, 2019-02-12)
Members of Rhizobiaceae contain a homologue of the iron-responsive regulatory protein RirA. In different bacteria, RirA acts as a repressor of iron uptake systems under iron-replete conditions and contributes to ameliorate ...
Tesis Doctoral
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Morfogénesis cortical en Laurentia Acuminata
(1977-09-01)
Tesis Doctoral
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Estudios sobre las actividades reductoras de nitratos en Bradyrhizobium spp. relaciones con la fijación simbiótica de N2 caracterización bioquímica y efectos de nitrógeno combinado
(1994)
Se ha realizado un estudio de la influencia de la especie de leguminosa, raza de Bradyrhizobium y niveles de nitrógeno combinado en el medio, sobre las actividades nitrogenasa y nitrato-reductasa del bacteroide. Igualmente ...
Tesis Doctoral
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Mobile genetic elements related to the diffusion of plasmid-mediated AmpC β-lactamases or carbapenemases from enterobacteriaceae: Findings from a multicenter study in Spain
(American Society for Microbiology, 2015-09-01)
We examined the genetic context of 74 acquired ampC genes and 17 carbapenemase genes from 85 of 640 Enterobacteriaceae isolates collected in 2009. Using S1 pulsed-field gel electrophoresis and Southern hybridization, 37 ...