Results 51 to 60 of about 947,884 (380)

Soil water dynamics related to the degree of compaction of two brazilian oxisols under no-tillage Dinâmica da água em função do estado de compactação de dois latossolos brasileiros sob sistema plantio direto

open access: yesRevista Brasileira de Ciência do Solo, 2009
Soil water properties are related to crop growth and environmental aspects and are influenced by the degree of soil compaction. The objective of this study was to determine the water infiltration and hydraulic conductivity of saturated soil under field ...
Vanderlei Rodrigues da Silva   +3 more
doaj   +1 more source

Sand Production Control in Sandstone Reservoirs Using a Modified Urea-formaldehyde Re [PDF]

open access: yesIranian Journal of Oil & Gas Science and Technology, 2017
Several techniques have been used for sand production control in sandstone reservoirs.The main objective of this research is to present a suitable resin to be used as a consolidation agent in oil reservoirs.
Mohammad reza Talaghat   +1 more
doaj   +1 more source

Impact of pigments on self-compacting concrete

open access: yesMokslas: Lietuvos Ateitis, 2011
We describe an impact of using iron oxide pigment on self-compacting concrete (SCC) properties. We have experimented with adding portions of iron oxide pigment from 3% to 6% into cement paste.
Ernestas Ivanauskas, Donatas Grigonis
doaj   +1 more source

Specifics of Selection and Preparation of Raw Materials By Bolgar Potters: pethrographic analysis results

open access: yesАрхеология евразийских степей, 2021
Technology issues are priority directions in the study of Volga Bolgaria pottery. Petrography significantly complements the results obtained using classical methods of archaeology.
Anna A. Kuklina, Oleg Yu. Andrushkevich
doaj   +1 more source

BMP antagonist CHRDL2 enhances the cancer stem‐cell phenotype and increases chemotherapy resistance in colorectal cancer

open access: yesMolecular Oncology, EarlyView.
Overexpression of CHRDL2 in colon cancer cells makes them more stem‐like and resistant to chemo‐ and radiotherapy. CHRDL2‐high cells have upregulation of the WNT pathway, genes involved in the DNA damage response (DDR) pathway and epithelial‐to‐mesenchymal transition (EMT). This leads to quicker repair of damaged DNA and more cell migration.
Eloise Clarkson, Annabelle Lewis
wiley   +1 more source

Self-consolidating concrete homogeneity

open access: yesMateriales de Construccion, 2007
Concrete instability may lead to the non-uniform distribution of its properties. The homogeneity of self-consolidating concrete in vertically cast members was therefore explored in this study, analyzing both resistance to segregation and pore structure ...
M. O. Valcuende, C. Parra, J. C. Jarque
doaj   +1 more source

Modelling urban floods using a finite element staggered scheme with an anisotropic dual porosity model [PDF]

open access: yes, 2019
In porosity models for urban flooding, artificial porosity is used as a statistical descriptor of the urban medium. Buildings are treated as subgrid-scale features and, even with the use of relatively coarse grids, their effects on the flow are accounted
Viero, Daniele P.
core   +1 more source

Bioengineering facets of the tumor microenvironment in 3D tumor models: insights into cellular, biophysical and biochemical interactions

open access: yesFEBS Open Bio, EarlyView.
The tumor microenvironment is a dynamic, multifaceted complex system of interdependent cellular, biochemical, and biophysical components. Three‐dimensional in vitro models of the tumor microenvironment enable a better understanding of these interactions and their impact on cancer progression and therapeutic resistance.
Salma T. Rafik   +3 more
wiley   +1 more source

The influence of heterogenous porosity on silicon nitride/steel wear in lubricated rolling contact [PDF]

open access: yes, 2000
Heterogeneous porosity is detected on the surface and subsurface of hot isostatically pressed (HIPed) silicon nitride spherical rolling elements. The extent of the localised porosity accounts for an area of 6% of the rolling element surface and 4% of the
Hadfield, M, Kang, J
core  

GDP‐fucose transporter SLC35C1: a potential regulatory role in cytosolic GDP‐fucose and fucosylated glycan synthesis

open access: yesFEBS Open Bio, EarlyView.
The inactivation of SLC35C1 (GDP‐fucose transporter) and enzymes involved in GDP‐fucose biosynthesis was studied. Fucose supplementation increases the level of GDP‐fucose to abnormal, millimolar values in the absence of the TSTA3 protein and SLC35C1 in contrast to the GMDS/SLC35C1 double mutant.
Edyta Skurska, Mariusz Olczak
wiley   +1 more source

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