Results 81 to 90 of about 2,490,208 (254)

Development of sample clean up methods for the analysis of Mycobacterium tuberculosis methyl mycocerosate biomarkers in sputum extracts by gas chromatography-mass spectrometry. [PDF]

open access: yes, 2015
A proof of principle gas chromatography-mass spectrometry method is presented, in combination with clean up assays, aiming to improve the analysis of methyl mycocerosate tuberculosis biomarkers from sputum.
O'Sullivan, Denise M.   +17 more
core   +1 more source

A Cu2S/NiOOH Heterojunction Enables Highly Selective Ammonia‐to‐Nitrite Electrooxidation at Industrially Relevant Current Densities

open access: yesAdvanced Materials, EarlyView.
Cu2S/NiOOH heterojunction enables efficient ammonia electrooxidation coupled with hydrogen evolution. Interfacial electronic modulation of Ni sites promotes selective NH3‐to‐NO2− electrooxidation at high current density. In a membrane electrode assembly, Cu2S/NiOOH maintains over 90% Faradaic efficiency of nitrite at 800 mA cm−2, highlighting its ...
Ke Wang   +13 more
wiley   +1 more source

New electrolytic conductivity detector for capillary gas chromatography. Analysis of chlorinated hydrocarbons

open access: yes, 2022
S.373-380An electrolytic conductivity detector for high resolution capillary gas chromatography has been constructed. By avoiding phase separation and with direct passage of the gas-liquid mixture through the conductivity cell, a high speed of response ...
Wolff, E., Piringer, O.G.
core   +1 more source

Duvatrienediols in cuticular wax of Burley tobacco leaves

open access: yesJournal of Lipid Research, 1976
4, 8, 13-Duvatriene-1, 3-diol diastereoisomers have been identified in the cuticular wax of fresh Burley tobacco leaves. Their structures were determined by gas-liquid chromatography, mass spectrometry, and infrared and ultraviolet spectroscopy ...
S Y Chang, C Grunwald
doaj   +1 more source

Programmable Carrier‐Free All‐Enzyme Beads for Modular Continuous‐Flow Biocatalysis

open access: yesAdvanced Materials, EarlyView.
Genetically encoded enzyme building blocks self‐assemble into monodisperse, carrier‐free protein beads via a droplet‐based formulation strategy. These programmable catalytic particles enable modular continuous‐flow biocatalysis, from single‐enzyme reactions to multi‐enzyme cascades and bead–bead coupled reactor systems.
Jennifer Kühne   +12 more
wiley   +1 more source

Carrier gas splitting and multi-flow-path optimization for online natural gas chromatography

open access: yesYou-qi chuyun
ObjectiveOnline gas chromatographs are core equipment for energy metering and trade settlement of natural gas. Traditional systems commonly use expensive helium as both the separation carrier gas and the valve driving gas; valve actuation can consume as ...
Quanbin PEI   +4 more
doaj   +1 more source

Gas Chromatography

open access: yes, 2019
Gas chromatography (GC) is one of the most important types of chromatography used in analytical chemistry for separating and analyzing chemical organic compounds.

core   +1 more source

From Dark Photocatalysis to Photobattery‐Type Operation: A Re‐Functionalized Ti‐MOF for Solar Energy Storage

open access: yesAdvanced Materials, EarlyView.
ReCl47‐bpy is developed as a solar‐rechargeable, Re‐functionalized two‐dimensional metal–organic framework (MOF) for light‐driven charge storage and dark utilization. Re–bipyridine sites stabilize photoinduced electrons, enabling two complementary configurations: a MOF suspension for long‐lived charge retention and dark H2 evolution, and a spin‐coated ...
Shufan Wu   +8 more
wiley   +1 more source

Adaptive Supramolecular Interactions Govern Redox‐Active Molecules in Aqueous Redox Flow Batteries

open access: yesAdvanced Materials, EarlyView.
Adaptive supramolecular interactions overcome the solubility‐stability trade‐off in aqueous redox flow batteries. Hydrophobic anions disrupt intrinsic π–π stacking to enable high solubility, while redox‐state‐dependent spin pairing and cation coordination dynamically stabilize reactive intermediates during operation.
Vikram Singh   +12 more
wiley   +1 more source

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