Results 61 to 70 of about 18,681 (274)

Caustics of Non-Paraxial Perfect Optical Vortices Generated by Toroidal Vortex Lenses

Photonics, 2021
In this paper, we consider the comparative formation of perfect optical vortices in the non-paraxial mode using various optical elements: non-paraxial and parabolic toroidal vortex lenses, as well as a vortex axicon in combination with a parabolic lens ...
Svetlana N. Khonina, Sergey I. Kharitonov, Sergey G. Volotovskiy, Viktor A. Soifer   +3 more
doaj   +1 more source

Signatures of galactic magnetic lensing upon ultra high energy cosmic rays [PDF]

, 2000
We analyse several implications of lensing by the regular component of the galactic magnetic field upon the observed properties of ultra high energy cosmic rays.
Harari, Diego, Mollerach, Silvia, Roulet, Esteban   +2 more
core   +2 more sources

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

Inhomogeneous tachyon condensation [PDF]

, 2009
We investigate the spacetime-dependent condensation of the tachyon in effective field theories. Previous work identified singularities in the field which appear in finite time: infinite gradients at the kinks, and (in the eikonal approximation) caustics ...
A. Jeffrey, A. Sen, A. Sen, C.-j. Kim, D. Choudhury, D. Kutasov, E.A. Bergshoeff, F. Larsen, G. Gibbons, G.N. Felder, Huiquan Li, K. Hashimoto, L. Kofman, M. Abramowitz, M. Smedback, Mark Hindmarsh, N. Barnaby, N. Barnaby, S. Sugimoto   +18 more
core   +3 more sources

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Phosphatidylinositol 4‐kinase as a target of pathogens—friend or foe?

FEBS Letters, EarlyView.
This graphical summary illustrates the roles of phosphatidylinositol 4‐kinases (PI4Ks). PI4Ks regulate key cellular processes and can be hijacked by pathogens, such as viruses, bacteria and parasites, to support their intracellular replication. Their dual role as essential host enzymes and pathogen cofactors makes them promising drug targets.
Ana C. Mendes, Guilherme M. Azevedo, Amanda P. Barcellos, Diana Bahia   +3 more
wiley   +1 more source

Evaluation of mixed-mode thermal stress intensity factor in glass plates at various temperatures (Effect of crack width on the sign of the SIF)

Mechanical Engineering Journal, 2015
Mixed-mode thermal stress intensity factors (SIFs) are investigated at various temperatures using the method of caustics. First, theoretical caustic patterns are obtained for various types of optical systems in addition to the mode II SIF KII and mode I
Masahiro SUETSUGU, Kouichi SEKINO
doaj   +1 more source

The Chang-Refsdal Lens Revisited

, 2006
This paper provides a complete theoretical treatment of the point-mass lens perturbed by constant external shear, often called the Chang-Refsdal lens. We show that simple invariants exist for the products of the (complex) positions of the four images, as
Abramowitz, Alexander, An, Asada, Asada, Berndt, Bourassa, Bozza, Bozza, Burke, Carleson, Chang, Chang, Dalal, Dobler, Dominik, Dominik, Erdélyi, Evans, Finch, Gaudi, Gould, Gould, Gradshteyn, Hunter, Jin H. An, Khavinson, Khavinson, Kovner, N. Wyn Evans, Paczyński, Petters, Press, Rhie, Rhie, Rhie, Schneider, Schneider, Schramm, Subramanian, Witt, Witt, Witt   +42 more
core   +1 more source

Crosstalk between the ribosome quality control‐associated E3 ubiquitin ligases LTN1 and RNF10

FEBS Letters, EarlyView.
Loss of the E3 ligase LTN1, the ubiquitin‐like modifier UFM1, or the deubiquitinating enzyme UFSP2 disrupts endoplasmic reticulum–ribosome quality control (ER‐RQC), a pathway that removes stalled ribosomes and faulty proteins. This disruption may trigger a compensatory response to ER‐RQC defects, including increased expression of the E3 ligase RNF10 ...
Yuxi Huang, Satoshi Hashimoto, Sota Ito, Chisato Kikuguchi, Miho Hoshi, Kiyoshi Yamaguchi, Yoichi Furukawa, Toru Suzuki, Toshifumi Inada   +8 more
wiley   +1 more source