Results 61 to 70 of about 97,949 (204)

Selective low concentration ammonia sensing in a microfluidic lab-on-a-chip [PDF]

open access: yes, 2006
In the medical community, there is a considerable interest in a diagnostic breath analyzer for ammonia that is selectively enough to measure in exhaled air and small enough for the small volumes available in such an application.
Berg, Albert van den   +4 more
core   +3 more sources

Profuse Surface Activation of Ir‐Dispersed Titanium Nitride Bifunctional Electrocatalysts

open access: yesAdvanced Energy & Sustainability Research, 2021
Dispersing small amounts of rare‐earth metal on the surface of metallic nitrides displays great prospects for systematic tweaking of electrocatalytic activity.
Ganesan Anandhababu   +3 more
doaj   +1 more source

A Facile and Highly Efficient Three Component Synthesis of Pyran and Chromene Derivatives in the Presence of Nano SnO2 as a catalyst [PDF]

open access: yesشیمی کاربردی روز, 2015
Nano tin dioxide was employed as a catalyst for efficient and facile preparation of pyran derivatives via the one-pot three component condensation reaction of various aldehydes with malononitrile and dimedone.
سید محمد وحدت   +2 more
doaj   +1 more source

Dynamic modelling of a fractionation process for a liquid mixture using supercritical carbon dioxide [PDF]

open access: yes, 2001
This work presents a simple dynamic modelling of a process of separation of a quaternary mixture using supercritical CO2. Thermodynamic description is accomplished using efficient available models (SRK equation of state with MHV2 mixing rules).
Abrams   +18 more
core   +3 more sources

The derivation of the electrical conductance/temperature dependency for tin dioxide gas sensor [PDF]

open access: yes, 2014
The dependency between the electrical conductivity and the temperature of the tin dioxide layer at the constant concentration of the detected gas is derived here.
Gajdošík, Libor
core   +2 more sources

Properties of thin transparent SnO2:Sb films [PDF]

open access: yesЖурнал нано- та електронної фізики, 2009
We study the electrical and optical properties of tin dioxide films, produced by the spraying method of aqueous-alcoholic solution of tin tetrachloride with antimony trichloride addition.
S.L. Khrypko
doaj  

Ammonia sensing using lossy mode resonances in a tapered optical fibre coated with porphyrin-incorporated titanium dioxide [PDF]

open access: yes, 2016
The development of an ammonia sensor, formed by the deposition of a functionalised titanium dioxide film onto a tapered optical fibre is presented. The titanium dioxide coating allows the coupling of light from the fundamental core mode to a lossy mode ...
James, Stephen W.   +5 more
core   +1 more source

Solar reduction of carbon dioxide on copper-tin electrocatalysts with energy conversion efficiency near 20%

open access: yesNature Communications, 2022
Solar-driven carbon dioxide reduction has witnessed a renaissance in the past decades, but the system suffers from low reaction rates. Here the authors develop a copper/tin-oxide electrocatalyst, achieving a new benchmark solar-to-CO energy conversion ...
Jing Gao   +7 more
doaj   +1 more source

Rare isotope studies involving catalytic oxidation of CO over platinum-tin oxide [PDF]

open access: yes
Results of studies utilizing normal and rare oxygen isotopes in the catalytic oxidation of carbon monoxide over a platinum-tin oxide catalyst substrate are presented. Chemisorption of labeled carbon monoxide on the catalyst followed by thermal desorption
Hess, Robert V.   +3 more
core   +1 more source

Common Medieval Pigments [PDF]

open access: yes, 2004
This paper discusses the pigments used in medieval manuscripts. Specific types of pigments that are examined are earths, minerals, manufactured, and organics.
Baker, A
core   +1 more source

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