Results 71 to 80 of about 46,793 (276)

Unveiling the effect of urinary xenoestrogens on chronic kidney disease in adults: A machine learning model

open access: yesEcotoxicology and Environmental Safety
Exposure to three primary xenoestrogens (XEs), including phthalates, parabens, and phenols, has been strongly associated with chronic kidney disease (CKD).
Bowen Zhang, Liang Chen, Tao Li
doaj   +1 more source

Rapid Evolution of the Photosystem II Electronic Structure during Water Splitting

open access: yesPhysical Review X, 2018
Photosynthetic water oxidation is a fundamental process that sustains the biosphere. A Mn_{4}Ca cluster embedded in the photosystem II protein environment is responsible for the production of atmospheric oxygen.
Katherine M. Davis   +9 more
doaj   +1 more source

Ellipsometry, transmission, and photoluminescence characterization of Mn-doped ITO thin films deposited by DC magnetron sputtering

open access: yesMaterials Research Express, 2023
Manganese-doped indium tin oxide (ITO) thin films (0–12.8 at% Mn) were deposited by DC magnetron sputtering. The structural, electrical, and optical properties of the films were studied.
Masoud Kaveh   +5 more
doaj   +1 more source

Nonresonant valence-to-core x-ray emission spectroscopy of niobium [PDF]

open access: yes, 2018
The valence-to-core (V2C) portion of x-ray emission spectroscopy (XES) measures the electron states close to the Fermi level. These states are involved in bonding, thus providing a measure of the chemistry of the material.
A. Jeremy Kropf   +9 more
core   +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

Biphasic effects of 17β-estradiol and xenoestrogens on dopaminergic neurons in developing zebrafish

open access: yesAquaculture and Fisheries
Due to the increasing pollution of aquatic environments by estrogen-like chemicals (xenoestrogens (XEs)), it is crucial to investigate their bioaccumulation, ecological impact, and potential endocrine-disrupting effects on aquatic organisms.
Ratu Fatimah   +4 more
doaj   +1 more source

Two-Mode Waveguide Characterization by Intensity Measurements from Exit Face Images

open access: yesIEEE Photonics Journal, 2012
A method that characterizes two-mode waveguides whose modes cannot be selectively excited (such as buried waveguides) is presented and demonstrated. The theoretical results are presented for $N$ modes, although for the sake of simplicity, only the two ...
Xesús Prieto-Blanco   +1 more
doaj   +1 more source

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

X-Ray Absorption and Emission Spectroscopy in Pharmaceutical Applications: From Local Atomic Structure Elucidation to Protein-Metal Complex Analysis—A Review

open access: yesApplied Sciences
X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES) are analytical techniques enabling precise analysis of the electronic structure and local atomic environment in chemical compounds and materials.
Klaudia Wojtaszek   +2 more
doaj   +1 more source

On some permutation polynomials over finite fields

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
Let p be prime, q=pm, and q−1=7s. We completely describe the permutation behavior of the binomial P(x)=xr(1+xes) (1≤e≤6) over a finite field Fq in terms of the sequence {an} defined by the recurrence relation an=an−1+2an−2−an−3 (n≥3) with initial ...
Amir Akbary, Qiang Wang
doaj   +1 more source

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