Results 41 to 50 of about 7,386,473 (331)

Heavy metal bioavailability and bioaccessibility in soil [PDF]

open access: yes, 2009
This chapter considers the use of a variety of approaches to assess either the bioavailability or the bioaccessibility of metals in soil. The bioavailability of metals from soils is considered with respect to a series of single-extraction methods ...
A.G. Oomen   +8 more
core   +1 more source

Evidence for the adaptation of protein pH-dependence to subcellular pH [PDF]

open access: yesBMC Biology, 2009
The availability of genome sequences, and inferred protein coding genes, has led to several proteome-wide studies of isoelectric points. Generally, isoelectric points are distributed following variations on a biomodal theme that originates from the predominant acid and base amino acid sidechain pKas.
Chan, Pedro, Warwicker, Jim
openaire   +4 more sources

Laser wakefield and direct acceleration in the plasma bubble regime [PDF]

open access: yes, 2018
Laser wakefield acceleration (LWFA) and direct laser acceleration (DLA) are two different kinds of laser plasma electron acceleration mechanisms. LWFA relies on the laser-driven plasma wave to accelerate electrons.
Zhang, Xi, Ph. D.
core   +1 more source

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

open access: yesPopulation Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source

Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia

open access: yesFEBS Letters, EarlyView.
This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley   +1 more source

Fachspezifische Qualitätsprofile von Rechtschreibunterricht in Deutschland und der Schweiz

open access: yesSchweizerische Zeitschrift für Bildungswissenschaften, 2023
Im Rahmen der ländervergleichenden Studie „Professionelle Kompetenzen und Unterrichtshandeln von Primarlehrpersonen im Lernbereich Rechtschreibung“ wurden 43 Rechtschreiblektionen zur Doppelkonsonantenschreibung in den Klassen 3 bis 6 videografiert und ...
Maja Wiprächtiger   +4 more
doaj   +1 more source

FIRST PASSAGE TIMES OF PH/PH/1/K AND PH/PH/1 QUEUES

open access: yesJournal of the Operations Research Society of Japan, 1987
The single-server phase type queues with finite as well as infinite capacity are considered. The Laplace transforms for some first passage times probability density functions (for example, busy period, inter- overflow time) are established. It is proved that dimensions of the inverse matrices do not exceed the maximum from the number of arrival or ...
openaire   +4 more sources

The epithelial barrier theory proposes a comprehensive explanation for the origins of allergic and other chronic noncommunicable diseases

open access: yesFEBS Letters, EarlyView.
Exposure to common noxious agents (1), including allergens, pollutants, and micro‐nanoplastics, can cause epithelial barrier damage (2) in our body's protective linings. This may trigger an immune response to our microbiome (3). The epithelial barrier theory explains how this process can lead to chronic noncommunicable diseases (4) affecting organs ...
Can Zeyneloglu   +17 more
wiley   +1 more source

pH Game [PDF]

open access: yes, 2003
The purpose of this resource is to teach students about the acidity levels of liquids and other substances around their school so they understand what pH levels tell us about the environment.
The GLOBE Program, UCAR (University Corporation for Atmospheric Research)
core  

Tangential Large Scale Structure as a Standard Ruler: Curvature Parameters from Quasars [PDF]

open access: yes, 2000
Several observational analyses suggest that matter is spatially structured at $\approx 130h^{-1}Mpc$ at low redshifts. This peak in the power spectrum provides a standard ruler in comoving space which can be used to compare the local geometry at high and
Mamon, Gary A., Roukema, Boudewijn F.
core   +3 more sources

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