In this study, a series of laboratory tests were performed to investigate the effects side ramp slope, crest length, and porous media properties on flow regimes, water-surface profiles, discharge coefficients, energy dissipation in embankment gabion weirs with upstream downstream slopes. 24 physical models solid three different upstream/downstream slopes (90°, 45° 26.5°) created. To complexity ...

A new species of chameleon, Trioceros wolfgangboehmei sp. nov. , inhabiting the northern slopes Bale Mountains in Ethiopia, is described. It differs from its Ethiopian congeners by a combination following features: presence prominent dorsal crest with low number enlarged conical scales reaching along anterior half tail as crest, casque raised above heterogeneous body scalation, long canthus par...

Tumor-promoting phorbol esters were used to manipulate the in vitro development of neural crest cells. When plated at clonal density in secondary culture, quail neural crest cells from the trunk region gave rise to three types of colonies, pigmented, unpigmented, and mixed. Pigmented colonies consisted exclusively of melanocytes; up to 50% of the unpigmented mixed colonies contained adrenergic ...

Abstract Globally vegetation cover on coastal sand dunes has increased since at least the 1950s. With aim of restoring or increasing biodiversity, land managers in several countries have removed and/or reprofiled dune slopes to reinvigorate geomorphic activity. However, longevity these interventions can be relatively short (on order 5 10 years), and further active management is required. Hypoth...

The slope reinforcement scheme has an important influence on the prevention and control of landslides. A reasonable can improve reliability, economy efficiency landslide resistance. It is urgent to establish a local precise method for landslides basis clear process instability modes Taking high-steep anti-dip rock as example, six numerical models are established by using continuum–discontinuum ...

Slope disasters often include soil erosion and shallow landslides. These types of slope failure can occur in unsaturated soil. In this study, artificial rainfall is applied to a compacted laboratory investigate the effects intensity, initial moisture content relative compaction on infiltration behavior an subjected infiltration. Soil probes installed were used monitor during experiment. Test re...

The discovery of three new species of Enyalioides from the tropical Andes in Ecuador and northern Peru is reported. Enyalioidesaltotambo sp. n. occurs in northwestern Ecuador and differs from other species of Enyalioides in having dorsal scales that are both smooth and homogeneous in size, a brown iris, and in lacking enlarged, circular and keeled scales on the flanks. Enyalioidesanisolepis sp....

To define the timing of neural crest formation, we challenged the fate of presumptive neural crest cells by grafting notochords, Sonic Hedgehog- (Shh) or Noggin-secreting cells at different stages of neurulation in chick embryos. Notochords or Shh-secreting cells are able to prevent neural crest formation at open neural plate levels, as assayed by DiI-labeling and expression of the transcriptio...

The article provides information about nival-volcanogenic, possibly glacial-volcanogenic, mudflows (lahars) on three streams the south side of Atlasov Island (Kuril Islands, Russia). island is an active stratovolcano Alaid, 2339 m asl high. effusive-explosive eruption Alaid volcano began September 10, 2022 and continues to present day. Strombolian activity apical cone lava outflow observed. Lav...

introduction: whitening toothpastes which have been accepted in populations may affect properties of enamel and restorative materials. the aim of this study was to compare the microhardness of human enamel and z250 microhybrid composite resin after brushing with two whitening toothpastes. materials and methods: in this experimental study of enamel specimens, forty five freshly extracted human i...