Results 91 to 100 of about 21,308,721 (308)

Instanton Cosmology and Domain Walls from M-theory and String Theory [PDF]

, 1998
The recent proposal by Hawking and Turok for obtaining an open inflationary universe from singular instantons makes use of low-energy effective Lagrangians describing gravity coupled to scalars and non-propagating antisymmetric tensors.
Bremer, M., Stelle, K., Pope, C., Stelle, K. S., Bremer, M.S., Lu, H, Duff, M., Lu, Hong, Duff, M.J., Stelle, K.S., Duff, M. J., Lu, H., Pope, C.N., C.N. Pope(George P. & Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX 77843, U.S.A.)   +13 more
core   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source

Supersymmetry and homogeneity of M-theory backgrounds

, 2004
We describe the construction of a Lie superalgebra associated to an arbitrary supersymmetric M-theory background, and discuss some examples. We prove that for backgrounds with more than 24 supercharges, the bosonic subalgebra acts locally transitively ...
Figueroa-O'Farrill, J M, Philip, S, Meessen, P   +2 more
core   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Macroscopic approaches to rotating neutron stars [PDF]

Ядерна фізика та енергетика
The macroscopic model for a neutron star (NS) as a perfect liquid drop at equilibrium is extended to rotating systems with a small frequency ω within the effective-surface (ES) approach.
A. A. Uleiev, A. G. Magner, S. P. Maydanyuk, A. Bonasera, H. Zheng, S. N. Fedotkin, A. I. Levon, U. V. Grygoriev, T. Depastas   +8 more
doaj   +1 more source

Perturbative F-theory 10-brane and M-theory 5-brane

Journal of High Energy Physics, 2021
The exceptional symmetry is realized perturbatively in F-theory which is the manifest U-duality theory. The SO(5) U-duality symmetry acts on both the 16 space-time coordinates and the 10 worldvolume coordinates.
Machiko Hatsuda, Warren Siegel
doaj   +1 more source

All homogeneous N = 2 M-theory truncations with supersymmetric AdS4 vacua

, 2012
We study consistent truncations of M-theory to gauged N = 2 supergravity in four dimensions, based on a large class of SU(3)-structures in seven dimensions.
Sub String Theory Cosmology and ElemPart, Paul Koerber, Koerber, P., Davide Cassani, Cassani, Davide, Theoretical Physics, Varela, Oscar, Koerber, Paul, Cassani, D., Varela Rizo, O. M., Oscar Varela   +10 more
core   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Higher form symmetries and M-theory

Journal of High Energy Physics, 2020
We discuss the geometric origin of discrete higher form symmetries of quantum field theories in terms of defect groups from geometric engineering in M-theory.
Federica Albertini, Michele Del Zotto, Iñaki García Etxebarria, Saghar S. Hosseini   +3 more
doaj   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source