Results 141 to 150 of about 41,447 (280)

Molecular mechanism of ischemic postconditioning in promoting diabetic ischemic brain injury repair via the microRNA‐34a–BDNF–SIX3 signaling axis

open access: yesAnimal Models and Experimental Medicine, EarlyView.
Diabetes combined with ischemic stroke (DMIS) exacerbates brain infarct size and neuronal damage compared to nondiabetic ischemic stroke (IS). This study reveals that microRNA‐34a (miR‐34a) plays a key role in DMIS pathogenesis: miR‐34a directly targets and suppresses brain‐derived neurotrophic factor (BDNF) and Sine oculis homeobox 3 (SIX3), promoting
Ling Zhao   +5 more
wiley   +1 more source

Controlling Near‐Infrared Fluorescence‐to‐Phosphorescence Ratios and Triplet Lifetimes in Rhodium(I) Dimers via Primary and Secondary Coordination Sphere Effects

open access: yesAngewandte Chemie, EarlyView.
RhI dimers with bridging aryl isocyanide and di‐phosphine ligands show NIR‐I or NIR‐II fluorescence/phosphorescence, depending on the ligands and conformational rigidity at the Rh2 core. Rh‐Rh interactions can be tuned by peripheral modification of the aryl isocyanide ligand, resulting in a rigid Rh2 core and improved photophysical properties ...
Vanitha R. Naina   +4 more
wiley   +2 more sources

Modulation of Millisecond Chlorophyll Luminescence by Non-Photochemical Fluorescence Quenching

open access: yesZeitschrift für Naturforschung C, 1989
Abstract By combining a high frequency modulation system for measurement of fluorescence with a phosphoroscope type apparatus for measurement of luminescence, recordings of fluorescence and luminescence induction kinetics under identical conditions were obtained.
W. Bilger, U. Schreiber
openaire   +1 more source

Aldehyde–Olefin Couplings by Photoinduced Reduction of Electron‐Deficient Olefins with Hantzsch Ester Anions

open access: yesAngewandte Chemie, EarlyView.
Single‐electron transfer‐mediated reductive carbonyl–olefin couplings are valuable carbon–carbon bond forming reactions. However, limitations persist for couplings of aliphatic aldehydes with electron‐deficient olefins. Here, we report a simple, photocatalyst‐free protocol that overcomes these limitations by using a Hantzsch ester anion as a ...
Zhihang Li, Adam Noble
wiley   +2 more sources

Use of Open Source Hardware and Software Platforms to Quantify Spectrally Dependent Differences in Photochemical Efficiency and Functional Absorption Cross Section within the Dinoflagellate Symbiodinium spp.

open access: yesFrontiers in Marine Science, 2017
Active chlorophyll a fluorescence is an essential tool for understanding photosynthetic activity within cnidarian/dinoflagellate symbioses. Fluorescence measurement is typically achieved by utilizing a blue or red monochromatic excitation light source ...
Kenneth D. Hoadley, Mark E. Warner
doaj   +1 more source

The role of tachysterol in vitamin D photosynthesis - A non-adiabatic molecular dynamics study

open access: yes, 2017
To investigate the role of tachysterol in the photophysical/chemical regulation of vitamin D photosynthesis, we studied its electronic absorption properties and excited state dynamics using time-dependent density functional theory (TDDFT), coupled ...
Baluyot, Noel   +4 more
core   +1 more source

Modificările structural-funcţionale ale aparatului fotosintetic la pomii de măr sub acţiunea factorilor interni şi externi de formare

open access: yesAgricultural Science, 2013
The purpose of our investigations was to identify the photosynthetic functional peculiarities of apple variety Florina using the fluorometric method and depending on the leave position on the shoot, presence/absence of the photo-assimilating acceptor ...
DRUŢĂ Ala   +2 more
doaj  

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