Results 111 to 120 of about 4,191,571 (369)

Controlled Aggregation of Pyrene‐Based Supramolecular Nanostructures for Light‐Driven Switchable H2 or H2O2 Production

open access: yesAdvanced Functional Materials, EarlyView.
This work reports the self‐assembly of a pyrene derivative into two distinct nanostructures and their application in visible‐light photocatalysis. The two nanostructures exhibit completely different yet complementary photocatalytic activities, promoting either H2 or H2O2 evolution.
Marianna Barbieri   +6 more
wiley   +1 more source

Mars Spectrometry 2: Gas Chromatography -- Second place solution [PDF]

open access: yesarXiv
The Mars Spectrometry 2: Gas Chromatography challenge was sponsored by NASA and run on the DrivenData competition platform in 2022. This report describes the solution which achieved the second-best score on the competition's test dataset. The solution utilized two-dimensional, image-like representations of the competition's chromatography data samples.
arxiv  

Strong Stability with respect to weak limit for a Hyperbolic System arising from Gas Chromatography [PDF]

open access: yesarXiv, 2009
We investigate a system related to a particular isothermal gas-solid chromatography process, called ?Pressure Swing Adsorption?, with two species and instantaneous exchange kinetics. This system presents the particularity to have a linearly degenerate eigenvalue: this allows the velocity of the gaseous mixture to propagate high frequency waves. In case
arxiv  

Proton irradiation of simple gas mixtures: Influence of irradiation parameters [PDF]

open access: yes, 1990
In order to get information about the influence of irradiation parameters on radiolysis processes of astrophysical interest, methane gas targets were irradiated with 6.5 MeV protons at a pressure of 1 bar and room temperature.
Hofmann, A.   +2 more
core   +1 more source

It Matters Where the Heavy Atom Is Placed: Optimizing the Spin–Orbital Coupling in Multiresonant TADF (MR‐TADF) Emitters and Its Impact on OLED Performance

open access: yesAdvanced Functional Materials, EarlyView.
The TOC showcases the chemical structure of the emitter tCzBT2B as an “MVP athlete” in a stadium surrounded by. spotlights and cheering fans celebrating its impressive performance in organic light‐emitting diodes (OLEDs). The stats for this emitter and its device are detailed below.
Dongyang Chen   +7 more
wiley   +1 more source

Method "Ethanol as Internal Standard" for determination of volatile compounds in alcohol products by gas chromatography in daily practice [PDF]

open access: yesarXiv, 2016
Recently proposed new method "Ethanol as Internal Standard" for determination of volatile compounds in alcohol products by gas chromatography (GC) is investigated from different sides including method testing on prepared standard solutions like cognac and brandy, different ethanol-water solutions and certified reference material CRM LGC5100 Whisky ...
arxiv  

Measuring surface-area-to-volume ratios in soft porous materials using laser-polarized xenon interphase exchange NMR

open access: yes, 2001
We demonstrate a minimally invasive nuclear magnetic resonance (NMR) technique that enables determination of the surface-area-to-volume ratio (S/V) of soft porous materials from measurements of the diffusive exchange of laser-polarized 129Xe between gas ...
Butler J P   +22 more
core   +1 more source

Analytical methods used to determine pesticide residues in tea: A systematic review

open access: yesApplied Food Research, 2022
Tea is a worldwide consumed beverage that is known for its variety of flavors and aroma, in addition to its antioxidant, antimicrobial, anti-carcinogenic, and anti-inflammatory properties.
Areej Merhi   +3 more
doaj  

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