Results 81 to 90 of about 738,678 (282)

Dimensionally continued black holes sourced by a conformally coupled scalar field and Chaplygin-like dark fluid

European Physical Journal C: Particles and Fields
In this paper, we study the higher dimensional black holes of Lovelock gravity coupled with a conformal scalar field. The matter source of gravity is suggested to come from the Chaplygin-like dark fluid, i.e., the hybrid of a dark matter and dark energy.
Askar Ali, Khalid Saifullah
doaj   +1 more source

Black holes surrounded by Einstein clusters as models of dark matter fluid

European Physical Journal C: Particles and Fields, 2023
We construct a novel class of spherically symmetric and asymptotically flat black holes and naked singularities surrounded by anisotropic dark matter fluid with the equation of state (EoS) of the form $$P_t=\omega \rho $$ P t = ω ρ .
Kimet Jusufi
doaj   +1 more source

Unifying dark energy and dark matter with a scalar field

, 2005
The standard model of cosmology considers the existence of two components of unknown nature, ``dark matter'' and ``dark energy'', which determine the cosmological evolution. Their nature remains unknown, and other models can also be considered.
Arbey, A.
core   +1 more source

Affine equation of state from quintessence and k-essence fields [PDF]

, 2007
We explore the possibility that a scalar field with appropriate Lagrangian can mimic a perfect fluid with an affine barotropic equation of state. The latter can be thought of as a generic cosmological dark component evolving as an effective cosmological ...
Amedeo Balbi, Amendola L, Babichev E, Balbi A, Bertacca D Matarrese S Pietroni M, Chiba T, Claudia Quercellini, Ellis G F R, Holman R Naidu S, Marco Bruni, Pietrobon D, Seljak U, Spergel D N, Visser M, Wainwright J   +14 more
core   +2 more sources

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Thermodynamics and evaporation of perfect fluid dark matter black hole in phantom background

European Physical Journal C: Particles and Fields, 2023
We present a novel interpretation of the thermodynamics of perfect fluid dark matter (PFDM) black hole based on Misner–Sharp energy and then investigate its evaporation behavior.
Xiao Liang, Ya-Peng Hu, Chen-Hao Wu, Yu-Sen An   +3 more
doaj   +1 more source

Bounce universe induced by an inhomogeneous dark fluid coupled with dark matter [PDF]

Modern Physics Letters A, 2014
We investigate cosmological models with a linear inhomogeneous time-dependent equation-of-state (EoS) for the dark energy, coupled with dark matter, leading to a bounce cosmology. Equivalent descriptions in terms of the EoS parameters for an exponential, a power-law, or a double exponential form of the scale factor a is obtained.
Brevik, I., Obukhov, V. V., Timoshkin, A. V.   +2 more
openaire   +2 more sources

Pre‐analytical optimization of cell‐free DNA and extracellular vesicle‐derived DNA for mutation detection in liquid biopsies

Molecular Oncology, EarlyView.
Pre‐analytical handling critically determines liquid biopsy performance. This study defines practical best‐practice conditions for cell‐free DNA (cfDNA) and extracellular vesicle–derived DNA (evDNA), showing how processing time, storage conditions, tube type, and plasma input volume affect DNA integrity and mutation detection.
Jonas Dohmen, Lucrezia De Santis, Bret M. Stephens, Vincent Bernard, Jörg C. Kalff, Lara Braun, Phillipp Leyendecker, Johannes Röttgen, Daniel Weissinger, Anirban Maitra, Paola A. Guerrero, Alexander Semaan   +11 more
wiley   +1 more source

Archimedean-type force in a cosmic dark fluid: III. Big Rip, Little Rip and Cyclic solutions

, 2012
We analyze late-time evolution of the Universe in the framework of the self-consistent model, in which the dark matter is influenced by the Archimedean-type force proportional to the four-gradient of the dark energy pressure.
Balakin, Alexander B., Bochkarev, Vladimir V.   +1 more
core   +1 more source