1,844 research outputs found
Unextendible Maximally Entangled Bases in
The construction of unextendible maximally entangled bases is tightly related
to quantum information processing like local state discrimination. We put
forward two constructions of UMEBs in () based on the constructions of UMEBs in and in , which generalizes the results in [Phys. Rev. A. 94, 052302 (2016)] by
two approaches. Two different 48-member UMEBs in have been constructed in detail
Global Solutions of the Compressible Euler-Poisson Equations with Large Initial Data of Spherical Symmetry
We are concerned with a global existence theory for finite-energy solutions
of the multidimensional Euler-Poisson equations for both compressible gaseous
stars and plasmas with large initial data of spherical symmetry. One of the
main challenges is the strengthening of waves as they move radially inward
towards the origin, especially under the self-consistent gravitational field
for gaseous stars. A fundamental unsolved problem is whether the density of the
global solution forms concentration to become a delta measure at the origin. To
solve this problem, we develop a new approach for the construction of
approximate solutions as the solutions of an appropriately formulated free
boundary problem for the compressible Navier-Stokes-Poisson equations with a
carefully adapted class of degenerate density-dependent viscosity terms, so
that a rigorous convergence proof of the approximate solutions to the
corresponding global solution of the compressible Euler-Poisson equations with
large initial data of spherical symmetry can be obtained. Even though the
density may blow up near the origin at certain time, it is proved that no
concentration (delta measure) is formed in the vanishing viscosity limit for
the finite-energy solutions of the compressible Euler-Poisson equations for
both gaseous stars and plasmas in the physical regimes under consideration.Comment: 58 page
Global Solutions of the Compressible Euler-Poisson Equations for Plasma with Doping Profile for Large Initial Data of Spherical Symmetry
We establish the global-in-time existence of solutions of finite
relative-energy for the multidimensional compressible Euler-Poisson equations
for plasma with doping profile for large initial data of spherical symmetry.
Both the total initial energy and the initial mass are allowed to be {\it
unbounded}, and the doping profile is allowed to be of large variation. This is
achieved by adapting a class of degenerate density-dependent viscosity terms,
so that a rigorous proof of the inviscid limit of global weak solutions of the
Navier-Stokes-Poisson equations with the density-dependent viscosity terms to
the corresponding global solutions of the Euler-Poisson equations for plasma
with doping profile can be established. New difficulties arise when tackling
the non-zero varied doping profile, which have been overcome by establishing
some novel estimates for the electric field terms so that the neutrality
assumption on the initial data is avoided. In particular, we prove that no
concentration is formed in the inviscid limit for the finite relative-energy
solutions of the compressible Euler-Poisson equations with large doping
profiles in plasma physics.Comment: 42 page
Coupling metabolisms of arsenic and iron with humic substances through microorganisms in paddy soil
Nanocarriers Of Fe3O4 As A Novel Method For Delivery Of The Antineoplastic Agent Doxorubicin Into Hela Cells In Vitro
Here we report the synthesis and in vitro characterization of a redox-sensitive, magnetically inducible nanoparticle carrier system based on the doxorubicin (DOX) drug delivery model. Each quantal nanocarrier unit consists of a magnetite Fe3O4 nanoparticle core that is further encapsulated in self-assembled micelles of the redox-responsive polyethylene glycol derivative, DSPE-SS-mPEG. The nanocarrier system was prepared using a combination of ultrasonication and dialysis to produce the microenvironment sensitive delivery system. The final synthesized and DOX-loaded magnetic nanocarriers had an average size of ~150 nm when assembled with a 6.9% DOX payload. The release rate of DOX from these redox-responsive magnetic nanocarriers was shown to be accelerated in vitro when in the presence of glutathione (GSH). Furthermore, we demonstrated that more redox-responsive magnetic nanocarriers could be taken up by HeLa cells when a local magnetic field was applied. Once internalized within a cell, the micelles of the outer nanocarrier complex were broken down in the presence of higher concentrations of GSH, which accelerated the release of DOX. This produces a particle with dual operating characteristics that can be controlled via a specific cellular environment coupled with an exogenously applied signal in the form of a magnetic field triggering release
Microglial phagocytosis induced by fibrillar β-amyloid is attenuated by oligomeric β-amyloid: implications for Alzheimer's disease
Ensemble Mapping the Inner Structure of Luminous Quasars
A simple prediction of the well-known unification model of active galactic
nuclei is that a sample of sources should exhibit an anti-correlation between
the solid angle of the dusty torus and of the ionization cone (as the sum of
them shall equal 4), which however has never been detected. In this work,
we analyze the correlation between [OIII] 5007 narrow emission line equivalent
width and for a large sample of luminous
quasars. For the first time, we detect a clear intrinsic anti-correlation
between them, which immediately verifies the torus/ionization-cone geometry in
luminous quasars. More interestingly, the anti-correlation significantly
weakens with increasing wavelength from 2 to 12 m, and disappears
at 12 m. Simulations show a cool dust component (in addition to
equatorial torus) with its strength positively correlating with the solid angle
of the ionization cone is required to explain the observations. This shows that
the polar dust seen in nearby active galaxies also exists in luminous quasars,
with its contribution to total dust emission increasing with (from
2 to 12 m) and reaching between 39%-62% (model dependent) at rest
frame 12 m. Our findings provide a unique approach to map the otherwise
spatially unresolvable inner structure of quasars.Comment: 10 pages, 8 figures, accepted for publication in MNRA
Methyl 4-anilino-3-nitrobenzoate
In the molecule of the title compound, C14H12N2O4, the aromatic rings are oriented at a dihedral angle of 51.50 (4)°. An intramolecular N—H⋯O interaction results in the formation of a six-membered ring having an envelope conformation. In the crystal structure, intermolecular N—H⋯O interactions link the molecules into centrosymmetric dimers. π–π contacts between the benzene rings [centroid–centroid distance = 3.708 (1) Å] may further stabilize the structure
Population phylogenomic analysis of mitochondrial DNA in wild boars and domestic pigs revealed multiple domestication events in East Asia
A fine-grained mitochondrial DNA phylogenomic analysis was conducted in domestic pigs and wild boars, revealing that pig domestication in East Asia occurred in the Mekong and the middle and downstream regions of the Yangtze river
Effects of tumor metabolic microenvironment on regulatory T cells
Recent studies have shown that on one hand, tumors need to obtain a sufficient energy supply, and on the other hand they must evade the body’s immune surveillance. Because of their metabolic reprogramming characteristics, tumors can modify the physicochemical properties of the microenvironment, which in turn affects the biological characteristics of the cells infiltrating them. Regulatory T cells (Tregs) are a subset of T cells that regulate immune responses in the body. They exist in large quantities in the tumor microenvironment and exert immunosuppressive effects. The main effect of tumor microenvironment on Tregs is to promote their differentiation, proliferation, secretion of immunosuppressive factors, and chemotactic recruitment to play a role in immunosuppression in tumor tissues. This review focuses on cell metabolism reprogramming and the most significant features of the tumor microenvironment relative to the functional effects on Tregs, highlighting our understanding of the mechanisms of tumor immune evasion and providing new directions for tumor immunotherapy
- …