Results 101 to 110 of about 61,982,689 (238)
The subtle simplicity of cosmological correlators
Journal of High Energy PhysicsWe investigate cosmological correlators for conformally coupled ϕ 4 theory in four-dimensional de Sitter space. These in-in correlators differ from scattering amplitudes for massless particles in flat space due to the spacelike structure of future ...
Chandramouli Chowdhury +4 more
doaj +1 more source
Metastatic niche shaped by host factors influences disseminated cancer cell fate
FEBS Letters, EarlyView.Metastasis is shaped not only by cancer cells but also by the environments they encounter. This review explores how factors such as aging, diet, the microbiome, lifestyle, and environmental exposures remodel organ‐specific niches in the lung, liver, bone, and brain, influencing where metastatic cells survive, remain dormant, or grow, and ultimately ...
Gwennan Delyth Ward +2 more
wiley +1 more source
Vacuum states in de Sitter space [PDF]
Physical Review D, 1985 We examine possible vacuum states for scalar fields in de Sitter space, concentrating on those states (1) invariant under the de Sitter group O(1,4) or (2) invariant under one of its maximal subgroups E(3). For massive fields there is a one-complex-parameter family of de Sitter-invariant states, which includes the ``Euclidean'' vacuum state as a ...
openaire +3 more sources
Lightlike surfaces of spacelike curves in de Sitter 3-space [PDF]
, 2006 The Lorentzian space form with the positive curvature is called de Sitter space which is an important subject in the theory of relativity. In this paper we consider spacelike curves in de Sitter $3$-space. We define the notion of lightlike surfaces of
IZUMIYA, Shyuichi +3 more
core +1 more source
Journal of High Energy PhysicsParity-inverted anti-de Sitter space — “flipped AdS” — is studied through the accelerating boundary correspondence of a moving mirror trajectory. The particle production exhibits positive energy flux and a finite total energy (unlike AdS and de Sitter ...
Michael R. R. Good, Eric V. Linder
doaj +1 more source
Smaller is better: nanobodies meet NMR
FEBS Letters, EarlyView.Nanobodies are single‐domain antigen‐binding fragments derived from camelid heavy chain antibodies. Their small size, high stability, and exceptional specificity make nanobodies uniquely useful probes for NMR studies of protein dynamics, transient conformational states, and protein–protein interactions.
Oleg Y. Dmitriev
wiley +1 more source
FEBS Letters, EarlyView.Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
wiley +1 more source
DNA ligase LigE increases bacterial transformation with damaged extracellular DNA
FEBS Letters, EarlyView.The DNA ligase LigE from the naturally competent Gram‐negative bacterium Neisseria gonorrhoaea increases transformation with cut extracellular DNA. This process is ATP‐dependent and relies on the catalytic activity of LigE; it also requires that LigE contains an intact periplasmic localisation sequence, indicating that ligE functions in the periplasm ...
Jolyn Pan +4 more
wiley +1 more source
Spacelike submanifolds of codimension two in de Sitter space [PDF]
, 2009 We investigate the differential geometry of spacelike submanifolds of codimension two in de Sitter space and classify the singularities of lightlike surfaces and lightcone Gauss maps in de Sitter 4 ...
Kasedou, Masaki, Masaki Kasedou
core +1 more source
The Smarandache Curves on S12 and Its Duality on H02
Journal of Applied Mathematics, 2014 We introduce special Smarandache curves based on Sabban frame on S12 and we investigate geodesic curvatures of Smarandache curves on de Sitter and hyperbolic spaces.
Atakan Tuğkan Yakut +2 more
doaj +1 more source