Results: 239

Effect of watershed land use on water quality: a case study in Córrego da Olaria Basin, São Paulo State, Brazil

Braz. j. biol; 78 (4), 2018
Abstract The water quality is related to the hydrologic and limnologic properties of ground and surface water, and significant efforts have been made to monitor water sources to understand the effects of land use changes in agricultural areas, with significant socioeconomic activities. The objective of t...

Can climate and soil conditions change the morpho-anatomy among individuals from different localities? A case study in Aldama grandiflora (Asteraceae)

Braz. j. biol; 78 (4), 2018
Abstract Vegetative aerial organs are considerably more exposed to environmental conditions and can reflect the specific adaptations of plants to their local environment. Aldama grandiflora species are known to be widely distributed in Brazil; therefore, individuals from different populations of this spe...

Analysis of the association between bladder carcinoma and arsenic concentration in soil and water in southeast Brazil

Int. braz. j. urol; 44 (5), 2018
ABSTRACT In approximately 50% of cases of bladder carcinoma, an associated predisposing factor can be established. The main factors are exposure to tobacco, arsenic (As) ore and aromatic compounds. Arsenic is a metalloid with a low average concentration in the earth's crust, and one of the most dangerous...

Archaea diversity in vegetation gradients from the Brazilian Cerrado

Braz. j. microbiol; 49 (3), 2018
Abstract We used 16S rRNA sequencing to assess the archaeal communities across a gradient of Cerrado. The archaeal communities differed across the gradient. Crenarcheota was the most abundant phyla, with Nitrosphaerales and NRPJ as the predominant classes. Euryachaeota was also found across the Cerrado g...

Variations in culturable bacterial communities and biochemical properties in the foreland of the retreating Tianshan No. 1 glacier

Braz. j. microbiol; 49 (3), 2018
Abstract As a glacier retreats, barren areas are exposed, and these barren areas are ideal sites to study microbial succession. In this study, we characterized the soil culturable bacterial communities and biochemical parameters of early successional soils from a receding glacier in the Tianshan Mountain...

In vitro effect of Chrysosporium indicum and Chrysosporium keratinophylum on Toxocara canis eggs

Rev. argent. microbiol; 50 (3), 2018
The degree of antagonism exercised by fungi on geohelminth development varies according to the morphological alterations caused by different fungal species. Saprophytic fungi may exert ovicidal or ovistatic effects. The aim of this study was to apply scanning electron microscopy (SEM) to observe the acti...

The effect of water source and soil supplementation on parasite contamination in organic vegetable gardens

Abstract The objective of this study was to determine factors associated with vegetable contamination with zoonotic protozoan. Samples of water, soil and vegetables were collected from July/2014 to May/2016, totaling 83 samples, 21 properties of Londrina region, Paraná, Brazil. DNA amplification of Tox...

Estructura de la vegetación leñosa en tres áreas con Selva Baja Caducifolia en el Istmo-Costa de Oaxaca, México

Rev. biol. trop; 66 (2), 2018
Resumen La Selva Baja Caducifolia (SBC) es de gran importancia por su biodiversidad. En el Istmo-Costa de Oaxaca, México, se encuentran áreas con SBC y distinta categoría de protección (legislación mexicana): (1) Área Natural Protegida (ANP), (2) Área Destinada Voluntariamente para la Conservació...

Generación de un inoculante acelerador del compostaje

Rev. argent. microbiol; 50 (2), 2018
Se realizó el compostaje de una mezcla de estiércol de ovino más paja. Se extrajo inóculo de 5 diferentes fases del proceso de compostaje (a los 18, 23, 28, 33 y 38 días de iniciado) y se evaluó su efecto en la reducción del tiempo de biotransformación de un compost de estiércol de ovino. Las mu...

Tasa relativa de crecimiento en plántulas de dos poblaciones de Magnolia pugana (Magnoliaceae) en distintos niveles de luz y fertilidad del suelo

Rev. biol. trop; 66 (2), 2018
Resumen El estudio de la ecofisiología de las especies en peligro de extinción es clave para el éxito de programas de conservación y restauración ecológica. El objetivo de este trabajo fue conocer el efecto de los factores luz, fertilidad de suelo y procedencia de las plántulas en el crecimiento d...