Results 51 to 60 of about 40,177 (246)

Adsorptive Removal of Heavy Metal from Acidic Wastewater with Biochar Produced from Anaerobically Digested Residues: Kinetics and Surface Complexation Modeling

open access: yesBioResources, 2014
In this study, the adsorptive characteristics of biochar generated from anaerobically digested garden wastes (AD-char) were investigated. Metal adsorption onto AD-chars reached equilibrium in 48 h; the adsorption capacity of Cu2+ by AD-char was 182 μmol ...
Youchi Zhang, Wensui Luo
doaj   +1 more source

Kinetic, Thermodynamic and Adsorption Mechanism of Uranium (VI) Ions from Aqueous Solutions Using Mg/Al Layered Double Hydroxide [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2019
Layered double hydroxide (Mg/Al; 3:1) was synthesized by co-precipitation method and used to adsorb uranium from aqueous solutions. Various environmental parameters such as contact time, pH, initial uranium concentration and temperature were investigated.
A Darban Khodadadi   +3 more
doaj   +1 more source

On complex surfaces diffeomorphic to rational surfaces [PDF]

open access: yesInventiones Mathematicae, 1995
In this paper we prove that no complex surface of general type is diffeomorphic to a rational surface, thereby completing the smooth classification of rational surfaces and the proof of the Van de Ven conjecture on the smooth invariance of Kodaira dimension.
Friedman, Robert, Qin, Zhenbo
openaire   +3 more sources

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

open access: yesFEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman   +2 more
wiley   +1 more source

Zoll Manifolds and Complex Surfaces

open access: yesJournal of Differential Geometry, 2002
We classify compact surfaces with torsion-free affine connections for which every geodesic is a simple closed curve. In the process, we obtain completely new proofs of all the major results concerning the Riemannian case. In contrast to previous work, our approach is twistor-theoretic, and depends fundamentally on the fact that, up to biholomorphism ...
Lebrun, Claude, Mason, L.J.
openaire   +5 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

open access: yesFEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka   +11 more
wiley   +1 more source

Complex structures on Riemann surfaces [PDF]

open access: yesTransactions of the American Mathematical Society, 1972
Let X X be a Riemann surface (compact or noncompact) with the property that the length of every closed geodesic is bounded away from zero. Then we show that sufficiently small complex structures on X X can be described without making use of Schwarzian derivatives or the theory of quasiconformal mappings.
openaire   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

open access: yesFEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva   +10 more
wiley   +1 more source

Probing atomic-scale processes at the ferrihydrite-water interface with reactive molecular dynamics

open access: yesGeochemical Transactions
Interfacial processes involving metal (oxyhydr)oxide phases are important for the mobility and bioavailability of nutrients and contaminants in soils, sediments, and water.
Ardalan Hayatifar   +4 more
doaj   +1 more source

RETRASO, a code for modeling reactive transport in saturated and unsaturated porous media

open access: yesGeologica Acta, 2004
The code RETRASO (REactive TRAnsport of SOlutes) simulates reactive transport of dissolved and gaseous species in non-isothermal saturated or unsaturated problems.
Maarten W. Saaltink   +4 more
doaj   +1 more source

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