Results 61 to 70 of about 347,722 (310)

Boundary Problems for the Fractional and Tempered Fractional Operators [PDF]

open access: yesMultiscale Modeling & Simulation, 2018
To characterize the Brownian motion in a bounded domain $\Omega$, it is well known that the boundary conditions of the classical diffusion equation just rely on the given information of the solution along the boundary of a domain; in contrast, for the Lévy flights or tempered Lévy flights in a bounded domain, the boundary conditions involve the ...
Weihua Deng   +3 more
openaire   +4 more sources

Field-Flow Fractionation in Biopolymer Analysis

open access: yes, 2012
The 1990s and 2000s have seen a rapidly growing use of flow field-flow fractionation (flow FFF, FlFFF). As of today hundreds of publications in many different application areas are presented each year in which flow FFF has been used or is referred to. In
Nilsson, Lars   +4 more
core   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

open access: yesFEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

Continued Fractions and Linear Fractional Transformations

open access: yesIntegers, 2014
Rational approximations to a square root $\sqrt{k}$ can be produced by iterating the transformation $f(x) = (dx+k)/(x+d)$ starting from $\infty$ for any positive integer $d$. We show that these approximations coincide infinitely often with continued fraction convergents if and only if $4d^2/(k-d^2)$ is an integer, in which case the continued fraction ...
openaire   +5 more sources

Cell Fractionation

open access: yes, 2017
Protein function is generally dependent on its subcellular localisation. In Gram-negative bacteria such as Escherichia coli, a protein can be targeted to five different compartments: the cytoplasm, the inner membrane, the periplasm, the outer membrane and the extracellular medium.
Petiti, Melissa   +2 more
openaire   +6 more sources

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

open access: yesFEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace   +6 more
wiley   +1 more source

ARSENIC AND TRACE METALS IN WATER AND SEDIMENT OF THE VELHAS RIVER, SOUTHEASTERN IRON QUADRANGLE REGION, MINAS GERAIS, BRAZIL

open access: yesQuímica Nova
This work was undertaken in the Velhas River Basin, in the municipalities of Rio Acima, Nova Lima, Raposos and Sabará, upstream of the city of Belo Horizonte in Minas Gerais State, Brazil.
Danilo de C. Silva   +3 more
doaj   +1 more source

Consequences of employing amino acid vs. bulk‐tissue, stable isotope analysis: a laboratory trophic position experiment

open access: yesEcosphere, 2015
An important metric of environmental health is food web structure because it reflects species richness, natural history diversity, and resource availability.
R. E. Bowes, J. H. Thorp
doaj   +1 more source

Effect of evaporative fractionation on the distribution and composition of diamondoids in crude oils: a case study of crude oils from Yangtake structure, Kuqa Depression, Tarim Basim

open access: yesShiyou shiyan dizhi, 2022
Two sets of crude oil samples from the Yangtake structure in the Kuqa Depression of Tarim Basin were analyzed with the aid of GC and GC-MS to evaluate the effect of evaporative fractionation on the distribution and composition of diamondoid hydrocarbon ...
Xi YANG   +3 more
doaj   +1 more source

The mass-dependence of cadmium isotope fractionation during evaporation [PDF]

open access: yes, 2004
Mass fractionation laws relate the fractionation factor αA for one isotope ratio to the fractionation factor αB for a second isotope ratio of the same element, with a fractionation exponent β such that αA = αBβ. The exponent β defines the mass-dependence
Mezger, K.   +3 more
core   +1 more source

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