Results 21 to 30 of about 103,389 (181)

Comparison of Curie-point pyrolysis with tetramethylammonium hydroxide (TMAH) and base catalyzed methanolysis in leaf and root biomarker decomposition studies

open access: yesOrganic Geochemistry
Cutin and suberin have frequently been used as plant-part specific biomarkers in sediments and soils. The two most commonly used analytical methods described in the literature to study cutin and suberin are pyrolysis with tetramethylammonium hydroxide (TMAH) and base-catalyzed methanolysis with potassium hydroxide (KOH).
J.G. Altmann   +3 more
openaire   +4 more sources

Murchison Meteorite Analysis using Tetramethylammonium Hydroxide (TMAH) Thermochemolysis under Simulated Sample Analysis at Mars (SAM) Pyrolysis-Gas Chromatography-Mass Spectrometry Conditions

open access: yes, 2023
Agilent MassHunter py-GC-MS data in support of the article: Murchison Meteorite Analysis using Tetramethylammonium Hydroxide (TMAH) Thermochemolysis under Simulated Sample Analysis at Mars (SAM) Pyrolysis-Gas Chromatography-Mass Spectrometry ...
Angel Mojarro (3364124)
core   +2 more sources

Effective suppression of interface states in recessed-gate MIS-HEMTs by TMAH wet etching

open access: yesApplied Physics Express, 2023
The effect of tetramethylammonium hydroxide (TMAH) treatment prior to gate dielectric deposition on the performance of recessed-gate AlGaN/GaN metal-insulator-semiconductor high electron mobility transistors (MIS-HEMTs) was investigated.
Yu Li   +11 more
doaj   +1 more source

An alternative method for the determination of siloxane activities toward basic equilibration catalysts [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
The method used is based on the well-known fact that siloxane equilibrates once formed, do not change their compositions unless some siloxane compound is added, in which case new equilibrium compositions appear.
Govedarica Milutin N.
doaj   +3 more sources

Mathematical modeling of transesterification process kinetics of triglycerides catalyzed by TMAH [PDF]

open access: yesMATEC Web of Conferences, 2019
Biodiesel is a renewable fuel mainly produced by methylation of triglycerides of vegetable oils or animal fats. The production processes nowadays are particularly based on the utilization of inorganic alkali catalysts. However, it has been proved that an
Šánek Lubomír   +3 more
doaj   +1 more source

Investigating the Effects of Gel Casting Parameters on the Suspension Rheology and Mechanical Properties of Titanium Carbide Green Body [PDF]

open access: yesArchives of Metallurgy and Materials, 2018
In this paper the chemo-rheological behavior of aqueous TiC suspension and physical properties of gelcasted green body were investigated. The monomer system used in this project was acrylamide (AM) and methylenebisacrylamide (MBAM).
H. Foratirad   +2 more
doaj   +1 more source

Revealing the Role of Sidewall Orientation in Wet Chemical Etching of GaN-Based Ultraviolet Light-Emitting Diodes

open access: yesNanomaterials, 2019
We demonstrated that the tetramethylammonium hydroxide (TMAH) solution possesses different etching abilities to the chip sidewalls with different orientations because the orientation of chip sidewall determines the exposed crystallographic plane of ...
Hui Wan   +5 more
doaj   +1 more source

Structural characterization of humic acids, extracted from sewage sludge during composting, by thermochemolysis–gas chromatography–mass spectrometry [PDF]

open access: yes, 2006
Thermochemolysis coupled with gas chromatography and mass spectrometry were applied to determine the structure of humic acids (HA) extracted from a sewage sludge and straw mixture at different steps of composting.
Bailly, J.-R.   +16 more
core   +1 more source

Enhanced Light Extraction of Flip-Chip Mini-LEDs with Prism-Structured Sidewall

open access: yesNanomaterials, 2019
Current solutions for improving the light extraction efficiency of flip-chip light-emitting diodes (LEDs) mainly focus on relieving the total internal reflection at sapphire/air interface, but such methods hardly affect the epilayer mode photons.
Bin Tang   +6 more
doaj   +1 more source

Environmentally Benign Formation of Nickel Hexacyanoferrate-Derived Mesoframes for Heterogeneous Catalysis

open access: yesNanomaterials, 2021
The tetramethylammonium hydroxide (TMAH)-controlled alkaline etching of nickel hexacyanoferrate (NiHCF) mesocrystals is explored. The alkaline etching enables the formation of hollow framework structures with an increased surface area, the exposure of ...
Sascha Keßler   +3 more
doaj   +1 more source

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