Results 21 to 30 of about 93,688 (260)

De-repression of the RAC activator ELMO1 in cancer stem cells drives progression of TGFβ-deficient squamous cell carcinoma from transition zones

open access: yeseLife, 2017
Squamous cell carcinomas occurring at transition zones are highly malignant tumors with poor prognosis. The identity of the cell population and the signaling pathways involved in the progression of transition zone squamous cell carcinoma are poorly ...
Heather A McCauley   +3 more
doaj   +1 more source

Evoregions of fleas and their small mammalian hosts: Do they coincide?

open access: yesParasitology, 2023
Combining the biogeography and phylogenetic patterns of parasite-host associations allows a better understanding of the history of parasite–host interactions, which can be achieved via biogeographic regionalization incorporating phylogenetic information.
Boris R. Krasnov, Georgy I. Shenbrot
doaj   +1 more source

Ecosystem service coproduction across the zones of biosphere reserves in Europe

open access: yesEcosystems and People, 2021
Biosphere reserves (BR) balance biodiversity protection and sustainable use through different management restrictions in three zones: core areas, buffer zones, and transition areas.
Julia Palliwoda   +12 more
doaj   +1 more source

Testing White’s Floristic Impoverishment Hypothesis in the Forest-Savanna Transition Zones of Africa

open access: yesDiversity, 2023
In tropical Africa, forests and savannas are the two most widespread biomes and potentially represent alternative stable states with a divergent species composition. A classic, but untested, hypothesis posited by White (1983) suggests that the transition
Mathew Rees   +4 more
doaj   +1 more source

The type of forest edge shapes snail assemblages at forest–pasture transitions

open access: yesScientific Reports, 2023
Semi-natural, nutrient-poor calcareous grasslands are local biodiversity hotspots that are increasingly threatened by land use intensification, abandonment, or indirect effects from adjacent habitats.
Dénes Schmera   +2 more
doaj   +1 more source

The Transition Zone in Balmer‐dominated Shocks [PDF]

open access: yesThe Astrophysical Journal, 2007
25 pages, 8 figures.
Heng, K.   +3 more
openaire   +4 more sources

Experimental Monitoring of Transition Zones in Railway Tunnels

open access: yesCivil and Environmental Engineering, 2023
The expert research activity of transition zones of tunnels is one part of the overall set of these places on the railway line. Typical places where the stiffness of the railway changes are the portals of tunnels, where undesirable deformations occur ...
Hodas Stanislav   +2 more
doaj   +1 more source

Simulation of continuously deforming parabolic problems by Galerkin finite-elements method

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1986
A general numerical finite element scheme is described for parabolic problems with phase change wherein the elements of the domain are allowed to deform continuously.
Yahia S. Halabi
doaj   +1 more source

Significance analysis of the factors influencing the strength of the frozen soil-structure interface and their interactions in different phase transition zones

open access: yesCase Studies in Thermal Engineering, 2023
The freezing strength of the contact interface between foundation soil and infrastructure has been a key and difficult problem in the study of frost jacking of piles in cold regions; previous studies have focused on the influence law of experimental ...
Zuoyu Guo   +7 more
doaj   +1 more source

Analysis of the Dynamic Wheel Loads in Railway Transition Zones Considering the Moisture Condition of the Ballast and Subballast

open access: yesApplied Sciences, 2017
Transition zones in railway tracks are the locations with considerable changes in vertical support structures, e.g., near bridges. Due to possible water flow constrictions in transition zone structures, there is frequently an increased moisture level in ...
Haoyu Wang   +3 more
doaj   +1 more source

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