Results 11 to 20 of about 4,515 (188)

Factores que determinan la producción de becerros en el sistema vaca-cría del Estado de Tabasco, México

open access: yesNova Scientia, 2020
Introducción: El sistema vaca-cría consiste en la producción de becerros al destete para su posterior venta y engorde. En el Estado de Tabasco, un porcentaje alto de productores se dedica a esta actividad.
Yuridia Bautista-Martínez   +6 more
doaj   +1 more source

Prevalencia de anticuerpos contra diarrea viral bovina en vacas no vacunadas en los estados de Puebla, Tabasco y Veracruz, México

open access: yesRevista Mexicana de Ciencias Pecuarias, 2018
La prevalencia (PRE) de anticuerpos contra diarrea viral bovina (DVB) se determinó en 421 vacas de 24 ranchos ubicados en 11 municipios de los estados de Puebla, Veracruz y Tabasco, México.
Jorge Víctor Rosete Fernández   +7 more
doaj   +1 more source

Arqueología, Tiempo y “Vaca Muerta”

open access: yesRevista del Museo de Antropología, 2021
En este trabajo nos proponemos reflexionar sobre las intervenciones antrópicas que se pueden observar en un área determinada de la cuenca hidrocarburífera de la Provincia de Neuquén (Argentina). Los objetos y espacios en las diversas condiciones materiales y temporales de depositación, construcción o emplazamiento se confrontan como fabricaciones ...
openaire   +5 more sources

Construction of a prokaryotic expression system ofvacAgene and detection ofvacAgene, VacA protein inHelicobacter pyloriisolates and ant-VacA antibody in patients’ sera

open access: yesWorld Journal of Gastroenterology, 2004
To construct a recombinant prokaryotic expression vector inserted with Helicobacter pylori vacA gene and identify the immunity of the expressed recombinant protein, and to determine prevalence of vacA-carrying/VacA expressing H pylori isolates and seroprevalence of specific ant-VacA antibody in H pylori infected patients.Polymerase chain reaction ...
Jie, Yan, Ya-Fei, Mao
openaire   +2 more sources

Temporal profile of antimicrobial resistance exhibited by strains of Staphylococcus spp. isolated from cases of bovine mastitis for 20 years (1992-2011)

open access: yesCiência Rural, 2015
Records of in vitro susceptibility tests performed between 1992 and 2011 were retrospectively reviewed in order to evaluate the dynamic profiles of possible changes in antimicrobial resistance of Staphylococcus spp.
Ananda Paula Kowalski   +7 more
doaj   +1 more source

Prevalencia de diversos serovares de Leptospira interrogans en vacas no vacunadas en los estados de Puebla, Tabasco y Veracruz, México

open access: yesRevista Mexicana de Ciencias Pecuarias, 2022
El objetivo fue comparar las prevalencias de anticuerpos contra diferentes serovares de Leptospira interrogans entre los estados de Puebla, Tabasco y Veracruz, así como entre algunos de sus municipios, y determinar si el estatus sanitario de las vacas ...
Jorge Víctor Rosete Fernández   +7 more
doaj   +1 more source

Multi‐Targeting Carnosic Acid Kills Drug‐Resistant Helicobacter pylori With Narrow‐Spectrum Activity

open access: yesAdvanced Science, EarlyView.
Carnosic acid selectively eradicates drug‐resistant Helicobacter pylori through a multi‐targeted mechanism involving urease inhibition, membrane disruption, and biofilm eradication. It exhibits no detectable resistance, potent in vivo efficacy, and minimal impact on gut microbiota, positioning it as a promising narrow‐spectrum lead compound against ...
Yuefan Bai   +7 more
wiley   +1 more source

Efeitos da everminação de matrizes e de bezerros lactentes em sistema de produção de bovinos de corte na região de Cerrado Effects of deworming of cow-calf beef herds in brazilian savannas

open access: yesPesquisa Veterinária Brasileira, 2005
Estudou-se o efeito da everminação de vacas no pré-parto e de bezerros antes do desmame, no número de ovos de nematódeos nas fezes (OPG) e nos parâmetros produtivos em dois rebanhos de gado de corte na região do Brasil Central.
João B. Catto   +2 more
doaj   +1 more source

Climate‐driven resource availability drives medium‐ and broad‐scale temporal changes in owl–prey interactions over 24 years in a semi‐arid ecosystem

open access: yesEcography, EarlyView.
Predator–prey interactions are vital to ecosystem functioning but may be disrupted by climate change. We investigated a food‐web network involving three owl species over 24 years in a semi‐arid ecosystem at Bosque Fray Jorge National Park, Chile.
Jazmin M. Quiroz‐Calizaya   +12 more
wiley   +1 more source

Experimental reproduction of congenital anomalies in the progeny of cows fed apple pomace during pregnancy

open access: yesPesquisa Veterinária Brasileira
: This study aimed to describe and discuss the results of an experiment carried out in two stages with pregnant cows fed 25kg/apple pomace/day. The first stage involved 16 pregnant Holstein Friesian cows divided into four groups: Group 0 - Control (5 ...
Nathalia S. Wicpolt   +7 more
doaj   +1 more source

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