Results 61 to 70 of about 4,236,266 (343)

Student knowledge and perceptions of climate change and environmental sustainability at the Faculty of Health Sciences, University of Cape Town, South Africa

open access: yesAfrican Journal of Health Professions Education, 2023
Background. Climate change and polluting healthcare systems are significant threats to public health. Education about planetary health and environmentally sustainable healthcare is needed to equip health professionals to meet these challenges. Objectives.
J Irlam, Z Razzack, H-A Rother
doaj   +1 more source

PHASES High-Precision Differential Astrometry of δ Equulei [PDF]

open access: yes, 2005
Delta Equulei is among the most well-studied nearby binary star systems. Results of its observation have been applied to a wide range of fundamental studies of binary systems and stellar astrophysics.
M. Muterspaugh   +12 more
semanticscholar   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

open access: yesFEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

open access: yesFEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo   +2 more
wiley   +1 more source

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

open access: yesFEBS 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   +3 more
wiley   +1 more source

Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2

open access: yesCommunications Earth & Environment, 2022
Reduced carbonate precipitation rates and ocean acidification precede Ocean Anoxic Event 2 and coincide with the emplacement of large igneous provinces, suggest calcium isotopic analyses of malformed ...
Gabriella D. Kitch   +6 more
doaj   +1 more source

Rethinking plastic waste: innovations in enzymatic breakdown of oil‐based polyesters and bioplastics

open access: yesFEBS Open Bio, EarlyView.
Plastic pollution remains a critical environmental challenge, and current mechanical and chemical recycling methods are insufficient to achieve a fully circular economy. This review highlights recent breakthroughs in the enzymatic depolymerization of both oil‐derived polyesters and bioplastics, including high‐throughput protein engineering, de novo ...
Elena Rosini   +2 more
wiley   +1 more source

Mapping the Landscape of Space Sciences in Latin America: a Bibliometric Study of Productivity and Collaboration in Mexico, Brazil, Argentina, and Chile

open access: yesGeofísica Internacional
This paper presents a regional bibliometric study of space sciences in Latin America. The research is conducted in solar physics, magnetospheric physics, physics of solar-terrestrial relationships, cosmic ray physics, and planetary physics, over a 20 ...
A. A. Nicolás-Pablo   +3 more
doaj   +1 more source

An expression for the angle of repose of dry cohesive granular materials on Earth and in planetary environments

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2021
Significance The angle between the sloping side of a heap of particles and the horizontal, called angle of repose, is often used to characterize the flowability of granular materials on Earth and planetary environments, such as sand, dust aerosols, and ...
Filip Elekes, E. Parteli
semanticscholar   +1 more source

Addressing Economic Insecurities Can Improve Patient‐Reported Outcomes in Lupus

open access: yesArthritis Care &Research, Accepted Article.
Background Economic insecurities, such as food, housing, transportation, and financial challenges, are modifiable risk factors and influence patient‐reported outcomes (PROs) in systemic lupus erythematosus (SLE). We examined: 1) associations between economic insecurities and PROs; 2) the impact of screening and addressing economic insecurities during ...
Jay Patel   +8 more
wiley   +1 more source

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