Results 21 to 30 of about 144,465 (296)

Mimicking the Oxygen-Evolving Center in Photosynthesis

open access: yesFrontiers in Plant Science, 2022
The oxygen-evolving center (OEC) in photosystem II (PSII) of oxygenic photosynthetic organisms is a unique heterometallic-oxide Mn4CaO5-cluster that catalyzes water splitting into electrons, protons, and molecular oxygen through a five-state cycle (Sn, n 
Yang Chen   +7 more
doaj   +1 more source

Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive [PDF]

open access: yes, 1998
Three weeks of summertime surface‐based chemical and meteorological observations at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive are used to study instantaneous photochemical production and loss ...
Albercook, G. M.   +11 more
core   +3 more sources

Applications of carbon dots on tumour theranostics

open access: yesView, 2021
Carbon dots (CDs) have been extensively investigated as prime candidates for developing tumour theranostic platform due to their tunable fluorescence emission and excitation, good photostability, high water solubility and biocompatibility.
Hao Wu   +6 more
doaj   +1 more source

Photochemistry of N-(selenoalkyl)-phthalimides. Formation of N, Se-heterocyclic systems [PDF]

open access: yes, 2015
A variety of N-(selenomethyl)alkyl-phthalimides (alkyl = -(CH2)n-; n = 2-5, 1a, b, d, e) and N-(selenobenzyl)propyl phthalimide (1c) were synthesized and their photochemistry was studied at λ = 300 nm.
Argüello, Juan Elias   +3 more
core   +1 more source

Seasonal differences in the photochemistry of the South Pacific: A comparison of observations and model results from PEM-Tropics A and B [PDF]

open access: yes, 2001
A time-dependent photochemical box model is used to examine the photochemistry of the equatorial and southern subtropical Pacific troposphere with aircraft data obtained during two distinct seasons: the Pacific Exploratory Mission-Tropics A (PEM-Tropics ...
Avery, MA   +17 more
core   +1 more source

Stable organic self-assembled microwire lasers for chemical vapor sensing

open access: yesCommunications Chemistry, 2021
Organic microlaser sensors are highly promising for chemical vapor detection due to their chemical versatility, but their poor stabilities are hampering applications.
Zheming Chen   +4 more
doaj   +1 more source

Formation rates of complex organics in UV irradiated CH3OH-rich ices I: Experiments [PDF]

open access: yes, 2009
(Abridged) Gas-phase complex organic molecules are commonly detected in the warm inner regions of protostellar envelopes. Recent models show that photochemistry in ices followed by desorption may explain the observed abundances.
Garrod, R. T.   +3 more
core   +1 more source

Liquid Crystal Elastomers Under Confinement: A Review of Template‐Based Fabrication and Applications

open access: yesAdvanced Engineering Materials, EarlyView.
Template‐assisted confinement offers powerful ways to control the alignment, structure, and function of liquid crystal elastomers. This review highlights several templating strategies and details how geometry and interfaces shape material responses.
Meng Zhang   +7 more
wiley   +1 more source

Alginate and Chitosan-Based Delivery Systems for Improving the Bioavailability and Therapeutic Efficacy of Curcumin

open access: yesPharmaceutics
One of the major challenges in harnessing the therapeutic benefits of curcumin (an active ingredient from turmeric) is its poor bioavailability due to its short biological half-life.
Anand A. Sable, Amit Kunwar, Atanu Barik
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

open access: yesAdvanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger   +11 more
wiley   +1 more source

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