Results 91 to 100 of about 7,571,221 (346)

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

On a theorem of H. Hopf

International Journal of Mathematics and Mathematical Sciences, 1990
A simple proof of a theorem of H. Hopf [1], via Morse theory, is given.
Takis Sakkalis
doaj   +1 more source

Two Scenarios of the Quantum Critical Point

, 2007
Two different scenarios of the quantum critical point (QCP), a zero-temperature instability of the Landau state, related to the divergence of the effective mass, are investigated.
A. A. Abrikosov, A. B. Migdal, A. M. Dyugaev, A. Punnoose, B. Doniach, C. Bäuerle, C. Bäuerle, C. J. Pethick, D. N. Voskresensky, G. E. Volovik, G. E. Volovik, L. D. Landau, L. D. Landau, M. Neumann, M. V. Zverev, M. V. Zverev, M. V. Zverev, P. Coleman, P. Coleman, P. Gegenwart, P. Nozières, S. A. Artamonov, V. A. Khodel, V. A. Khodel, V. A. Khodel, V. A. Khodel, V. A. Khodel, V. R. Shaginyan, V. V. Borisov   +28 more
core   +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

Norming points and critical points

Journal of Mathematical Analysis and Applications, 2017
The authors introduce a concept of differentiation for functions defined on the unit sphere of a Banach space which allows them to prove, for Banach spaces with \(C^p\) norm, that a linear functional is norm-attaining if and only if it has a critical point on the unit sphere under this new concept of differentiation.
Dong Hoon Cho, Yun Sung Choi
openaire   +2 more sources

Pion Fluctuations near the QCD Critical Point [PDF]

, 1999
A critical point of second order, belonging to the universality class of the 3d Ising model, has recently been advocated as a strong candidate for the critical behaviour (at high temperatures) of QCD with non-zero quark masses.
Antoniou, N. G., Contoyiannis, Y. F., Diakonos, F. K.   +2 more
core   +1 more source

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source

Existence of multiple breathers for discrete nonlinear Schrodinger equations

Electronic Journal of Differential Equations, 2019
In this article we study discrete nonlinear Schrodinger equations without periodicity assumptions. We show the existence of multiple solutions of the form $u_n e^{-i\omega t}$ (called breathers) by using Clark's Theorem in critical point theory.
Tao Zhou, Xia Liu, Haiping Shi, Zongliang Wen   +3 more
doaj  

The Caenorhabditis elegans DPF‐3 and human DPP4 have tripeptidyl peptidase activity

FEBS Letters, EarlyView.
The dipeptidyl peptidase IV (DPPIV) family comprises serine proteases classically defined by their ability to remove dipeptides from the N‐termini of substrates, a feature that gave the family its name. Here, we report the discovery of a previously unrecognized tripeptidyl peptidase activity in DPPIV family members from two different species.
Aditya Trivedi, Rajani Kanth Gudipati
wiley   +1 more source

Zero-field Quantum Critical Point in CeCoIn$_5$

, 2013
Quantum criticality in the normal and superconducting state of the heavy-fermion metal CeCoIn$_5$ is studied by measurements of the magnetic Gr\"{u}neisen ratio, $\Gamma_H$, and specific heat in different field orientations and temperatures down to 50 mK.
Bauer, E. D., Gegenwart, P., Tokiwa, Y.
core   +1 more source