land use of sylhet has changed gradually. this is found from the field survey that in 1970 the area was dominated by marshy land (645.33 katha), vacant land (430.88 katha) and crop land (336.17 katha). by 1988 there was no university in the area. residential area also increased. it covered 39.11 % of total study area. now in 2007 there is a radical change noticed in the area in comparison with ...

abstractthe challenges of agroforestry systems’ adoption by farmers in the north central zone of nigeria, was carried out to address the following objectives; find out the perception of farmers on agroforestry technologies, identify the adoption level and ascertain why farmers discontinue agroforestry adoption.. data were collected from 722 agroforestry farmers out of 782 sets of questionnaire ...

Abstract Wind effects on a rain gage can cause a significant underestimation of rainfall depths and contribute to the inconsistency in rainfall data. To reconstruct rainfall data requires a consistent method to quantify the undercatch. Although some empirical adjustment factors have been recommended, they are not generalized enough to reflect the variations of wind speed with respect to height....

Gastrulation is the morphogenetic process by which, in metazoans, the germ layers are established in their characteristic spatial arrangement: ectoderm on the outside, endoderm inside, and mesoderm, if present, in between these two layers. Most often, the main activity of gastrulation involves the movement of the endoderm and mesoderm from the surface of the embryo to the interior, and a variet...

BACKGROUND In this work, we aimed to gain insights into the contribution of soil bacteria to carbon sequestration in Mediterranean habitats. In particular, we aimed to use bacterial laccase-encoding genes as molecular markers for soil organic C cycling. Using rainfed olive farming as an experimental model, we determined the stability and accumulation levels of humic substances and applied these...

An animal-vegetal axis exists in the unfertilized eggs of the ascidian Halocynthia roretzi. The first phase of ooplasmic segregation brings the egg cortex to the vegetal pole very soon after fertilization. In the present study, when 5-8% of the egg cytoplasm in the vegetal pole region was removed between the first and second phase of segregation, most embryos exhibited failure of gastrulation, ...

All endodermal and mesenchymal cells of the sea urchin embryo descend from the vegetal plate, a thickened epithelium of approximately 50 cells arising at the early blastula stage. Cell types that derive from the vegetal plate are specified conditionally by inductive interactions with underlying micromeres, but the molecular details of vegetal-plate specification remain unresolved. In a search f...

El objetivo de la presente investigación fue determinar los cambios cobertura vegetal entre años 1992 a 2017 microcuenca Volcán, Pamplona, Norte Santander, para las coberturas antes y después compra áreas estratégicas. Para esto, se seleccionaron procesaron imágenes satelitales 1992, 1997, 2014 correspondientes definidos; luego, aplicó metodología Corine Land Cover escala 1:100000 adaptada Colo...

The patterns of proteins synthesized in animal and vegetal regions of Xenopus oocytes, eggs and embryos were examined by 2D gel electrophoresis. In oocytes and eggs, the only proteins synthesized asymmetrically along the animal-vegetal axis were a small number of proteins synthesized predominantly in the vegetal hemisphere. At the cleavage stage there were a total of four proteins synthesized u...