Results 61 to 70 of about 3,613,230 (210)

Arching of force chains in excavated granular material

Frontiers in Earth Science
The physical arch and the arch effect are related to many geotechnical problems, such as the stability of mine openings, a tunnel’s shape, and disaster prevention.
Meimei Wang, Meimei Wang, Jin-An Wang, Fei Li, Chao Liang, Chao Liang, Liu Yang   +6 more
doaj   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Spiral Waves in Driven Dusty Plasma Medium: Generalized Hydrodynamic Fluid Description

, 2017
Spiral waves are observed in many natural phenomena. They have been extensively represented by the mathematical FitzHugh-Nagumo (FHN) model [Barkley et al., Phys. Rev. A 42, 2489 (1990)] of excitable media.
Das, Amita, Kumar, Sandeep, Patel, Bhavesh   +2 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Two particle model for studying the effects of space-charge force on strong head-tail instabilities

Physical Review Accelerators and Beams, 2016
In this paper, we present a new two particle model for studying the strong head-tail instabilities in the presence of the space-charge force. It is a simple expansion of the well-known two particle model for strong head-tail instability and is still ...
Yong Ho Chin, Alexander Wu Chao, Michael M. Blaskiewicz   +2 more
doaj   +1 more source

Study on Deflection of Surrounding Rock Force Chain and Disaster Mechanism of Instability in Deep Stope

Shock and Vibration, 2020
The mechanism of force chain deflection and instability-caused disaster in the deep surrounding rock of large-scale stopes was examined in this study using theoretical analyses, laboratory experiments, PFC3D numerical simulations, and other comprehensive
Guang-Xiang Xie, Anying Yuan, Lei Wang
doaj   +1 more source

The standing wave model of the mesons and baryons

, 2002
Only photons are needed to explain the masses of the pi(0), eta, Lambda, Sigma(0), Xi(0), Omega(-), Lambda(c,+), Sigma(c,0), Xi(c,0), and Omega(c,0) mesons and baryons. Only neutrinos are needed to explain the mass of the pi(+-) mesons.
Ahmad, Bahcall, Barnett, Barut, Bethe, Bhaduri, Blackman, Born, Born, Born, Born, Born, Born, Bose, Debye, E.L Koschmieder, El Naschie, El Naschie, El Naschie, El Naschie, Fröhlich, Fukuda, Gell-Mann, Ghatak, Goldfain, Gsponer, Hagiwara, Koschmieder, Koschmieder, Koschmieder, Koschmieder, Liesenfeld, Marek-Crnjac, Nambu, Perkins, Schwinger, Sommerfeld, Thirring, Weingarten, Wilson, Witten   +40 more
core   +2 more sources

Cytoplasmic p21 promotes stemness of colon cancer cells via activation of the NFκB pathway

Molecular Oncology, EarlyView.
Cytoplasmic p21 promotes colorectal cancer stem cell (CSC) features by destabilizing the NFκB–IκB complex, activating NFκB signaling, and upregulating BCL‐xL and COX2. In contrast to nuclear p21, cytoplasmic p21 enhances spheroid formation and stemness transcription factor CD133.
Arnatchai Maiuthed, Kerstin Huebner, Katharina Erlenbach‐Wuensch, Chuanpit Hampel, Daniela Thalheim, Adriana Vial‐Roehe, Bodee Nutho, Susanne Merkel, Arndt Hartmann, Pithi Chanvorachote, Regine Schneider‐Stock   +10 more
wiley   +1 more source

Forces from noncommutative geometry [PDF]

, 2001
Einstein derived general relativity from Riemannian geometry. Connes extends this derivation to noncommutative geometry and obtains electro-magnetic, weak and strong forces.
Schucker, T.
core   +3 more sources

The role of magnetoplasmons in Casimir force calculations

, 2009
In this paper we review the role of magneto plasmon polaritons in the Casimir force calculations. By applying an external constant magnetic field a strong optical anisotropy is induced on two parallel slabs reducing the reflectivity and thus the Casimir ...
Cocoletzi, G. H., Esquivel-Sirvent, R., Garcia-Serrano, R., Palomino-Ovando, M. A.   +3 more
core   +1 more source