Results 91 to 100 of about 10,014,798 (291)

Energy Distribution in f(R) Gravity

, 2009
The well-known energy problem is discussed in f(R) theory of gravity. We use the generalized Landau-Lifshitz energy-momentum complex in the framework of metric f(R) gravity to evaluate the energy density of plane symmetric solutions for some general f(R)
A. Einstein, A. Einstein, A. Komar, A. Papapetrou, A.M. Abbassi, C. Møller, C.C. Chang, C.W. Misner, D.R. Noakes, F.I. Cooperstock, G. Cognola, G. Cognola, G.G.L. Nashed, H. Bondi, J.D. Brown, J.M.M. Senovilla, J.N. Goldberg, J.W. Maluf, K.S. Virbhadra, K.S. Virbhadra, K.S. Virbhadra, K.S. Virbhadra, L. Amendola, L.D. Landau, M. Farasat Shamir, M. Sharif, M. Sharif, M. Sharif, M. Sharif, Muhammad Sharif, P.G. Bergmann, P.G. Bergmann, P.G. Bergmann, P.G. Bergmann, R. Penrose, R.C. Tolman, S. Nojiri, S. Nojiri, S. Nojiri, S. Nojiri, S. Weinberg, S.A. Hayward, T. Multamäki, T. Vargas, V. Faraoni, V. Faraoni, W. Hu   +46 more
core   +1 more source

Dietary Protein Intake and Peritoneal Protein Losses in Peritoneal Dialysis Patients

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Peritoneal dialysis (PD) patients lose protein in their waste dialysate, potentially increasing their risk for malnutrition. We wished to determine whether there was any association between losses and dietary protein intake (DPI). Methods DPI was assessed from 24‐h dietary recall using Nutrics software.
Haalah Shaaker, Andrew Davenport
wiley   +1 more source

Existence of stable wormholes on a noncommutative-geometric background in modified gravity

, 2017
In this paper, we discuss spherically symmetric wormhole solutions in $f(R,T)$ modified theory of gravity by introducing well-known non-commutative geometry in terms of Gaussian and Lorentizian distributions of string theory. For some analytic discussion,
Abbas, G., Mustafa, G., Waheed, Saira, Zubair, M.   +3 more
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Dynamics of f(R)-cosmologies containing Einstein static models

, 2008
We study the dynamics of homogeneous isotropic FRW cosmologies with positive spatial curvature in $f(R)$-gravity, paying special attention to the existence of Einstein static models and only study forms of $f(R)=R^n$ for which these static models have ...
Abdelwahab M, Baghram S, Barrow J D, Barrow J D, Bustelo A J, Capozziello S, Capozziello S, Capozziello S, Carloni S, Carloni S Leach J A Capozziello S Dunsby P, Carloni S Troisi A Dunsby P K S, Clifton T, Copeland E J Sami M Tsujikawa S, Duruisseau J P, Eddington A S, Eisenstein D J, Ellis G F R, Ellis G F R, Ford J Giusto S Saxena A, Goheer N, Goheer N, Goheer N, Jin X Liu D Li X, Knop R A, Leach J A, Leach J A Dunsby P K S Carloni S, Mustafa S, Naureen Goheer, Navarro I, Perlmutter S, Perlmutter S, Peter K S Dunsby, Poplawski N J, Rador T, Riess A G, Riess A G, Rituparno Goswami, Ruggiero M L, Sahni V, Sahni V, Sokolowski L M, Sotiriou T P, Spergel D N, Spergel D N, Srivastava S K, Starobinsky A A, Teyssandier P, Tonry J L   +47 more
core   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Flavourful Z ′ models for R K ∗ $$ {R}_{K^{\left(\ast \right)}} $$

Journal of High Energy Physics, 2017
We show how any flavour conserving Z ′ model can be made flavour violating and non-universal by introducing mass mixing of quarks and leptons with a fourth family of vector-like fermions with non-universal Z ′ couplings.
Stephen F. King
doaj   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Froggatt-Nielsen models with a residual Z_4^R symmetry

, 2013
The Froggatt-Nielsen mechanism provides an elegant explanation for the hierarchies of fermion masses and mixings in terms of a U(1) symmetry. Promoting such a family symmetry to an R-symmetry, we explicitly construct supersymmetric Froggatt-Nielsen ...
Dreiner, Herbi K., Luhn, Christoph, Opferkuch, Toby   +2 more
core   +1 more source