Results 31 to 40 of about 2,213,349 (340)

Pushed beyond the brink: Allee effects, environmental stochasticity, and extinction [PDF]

open access: yes, 2014
A demographic Allee effect occurs when individual fitness, at low densities, increases with population density. Coupled with environmental fluctuations in demographic rates, Allee effects can have subtle effects on population persistence and extinction ...
Roth, Gregory, Schreiber, Sebastian
core   +4 more sources

Persistent progress [PDF]

open access: yesCell, 2021
The highly effective and safe mRNA-based severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines draw on decades of painstaking research to overcome the many hurdles for delivering, expressing, and avoiding toxicity of therapeutic mRNA. Cell editor Nicole Neuman talked with Dr. Katalin Karikó and Dr.
openaire   +2 more sources

Postacute COVID-19 is Characterized by Gut Viral Antigen Persistence in Inflammatory Bowel Diseases

open access: yesGastroenterology, 2022
Background & Aims The coronavirus disease 2019 (COVID-19) pandemic has affected populations, societies, and lives for more than 2 years. Long-term sequelae of COVID-19, collectively termed the postacute COVID-19 syndrome, are rapidly emerging across the ...
A. Zollner   +8 more
semanticscholar   +1 more source

Time-varying persistence in US inflation [PDF]

open access: yes, 2016
The persistence property of inflation is an important issue not only for economists, but especially for central banks, given that the degree of inflation persistence determines the extent to which central banks can control inflation. Further, not only is
Caporin, Massimiliano, Gupta, Rangan
core   +2 more sources

Pyrazinamide Susceptibility Is Driven by Activation of the SigE-Dependent Cell Envelope Stress Response in Mycobacterium tuberculosis

open access: yesmBio, 2022
Pyrazinamide (PZA) plays a crucial role in first-line tuberculosis drug therapy. Unlike other antimicrobial agents, PZA is active against Mycobacterium tuberculosis only at low pH. The basis for this conditional drug susceptibility remains undefined.
Joshua M. Thiede   +8 more
doaj   +1 more source

Serine-Threonine Kinases Encoded by Split hipA Homologs Inhibit Tryptophanyl-tRNA Synthetase

open access: yesmBio, 2019
Type II toxin-antitoxin (TA) modules encode a stable toxin that inhibits cell growth and an unstable protein antitoxin that neutralizes the toxin by direct protein-protein contact.
Stine Vang Nielsen   +7 more
doaj   +1 more source

Sequence-Dependent Effects on the Properties of Semiflexible Biopolymers [PDF]

open access: yes, 2008
Using path integral technique, we show exactly that for a semiflexible biopolymer in constant extension ensemble, no matter how long the polymer and how large the external force, the effects of short range correlations in the sequence-dependent ...
Béla Joós   +3 more
core   +2 more sources

HipA-Mediated Phosphorylation of SeqA Does not Affect Replication Initiation in Escherichia coli

open access: yesFrontiers in Microbiology, 2018
The SeqA protein of Escherichia coli is required to prevent immediate re-initiation of chromosome replication from oriC. The SeqA protein is phosphorylated at the serine-36 (Ser36) residue by the HipA kinase.
Leise Riber   +4 more
doaj   +1 more source

Persistence and Evolution of SARS-CoV-2 in an Immunocompromised Host

open access: yesNew England Journal of Medicine, 2020
SARS-CoV-2 in an Immunocompromised Host This letter describes an immunocompromised patient who had persistent infection with SARS-CoV-2 over a period of months, despite several courses of remdesivi...
Bin-Hye Choi   +31 more
semanticscholar   +1 more source

Persistence Modules on Commutative Ladders of Finite Type [PDF]

open access: yes, 2015
We study persistence modules defined on commutative ladders. This class of persistence modules frequently appears in topological data analysis, and the theory and algorithm proposed in this paper can be applied to these practical problems.
Escolar, Emerson G., Hiraoka, Yasuaki
core   +1 more source

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