Results 11 to 20 of about 7,276 (219)

Tetramethylammonium hydroxide (TMAH) as an efficient catalyst for the one-pot synthesis of 1,2-dihydro-1-aryl- naphtho[1,2-e][1,3]oxazine-3-ones under solvent-free conditions

open access: yesBulletin of the Chemical Society of Ethiopia, 2016
1,2-Dihydro-1 -arylnaphtho[1,2-e][1,3]oxazine-3-one derivatives were synthesized in high yields using an efficient and one-pot condensation of 2-naphthol, aromatic aldehydes and urea catalyzed by tetramethylammonium hydroxide (TMAH) under solvent-free ...
N. Montazeri, E. M. Nezhad
doaj   +2 more sources

Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry [PDF]

open access: yesFood Chemistry: X
This study sought to validate the external calibration curve (CAL) method for iodine analysis in 26 selected foods and then to compare the test result with the isotope dilution mass spectrometry (IDMS).
Juntima Photi   +4 more
doaj   +2 more sources

Fabrication of β-Ga2O3/air-gap structures on (010) β-Ga2O3 by wet etching in tetramethylammonium hydroxide (TMAH)

open access: yesApplied Physics Express
We demonstrated the fabrication of β -Ga _2 O _3 /air-gap structures on (010) β -Ga _2 O _3 substrates through sequential dry etching and crystallographic wet etching.
Takayoshi Oshima
doaj   +2 more sources

Kinetic Study of Aerobic Degradation of Tetramethylammonium Hydroxide (Tmah) Waste Produced in Electronic Industries

open access: yesDEStech Transactions on Environment, Energy and Earth Sciences, 2017
Tetramethylammonium hydroxide is used in the electronic industry during the photolithography process to produce memories. The effluent produced in this process must be treated before discharging due its toxicity. The aim of this research is to evaluate the feasibility of biological treatment to remove this molecule from the effluent by aerobic process ...
I. D. Michelis   +3 more
semanticscholar   +4 more sources

Dataset for density/temperature correlation of tetramethylammonium hydroxide solutions of various concentrations

open access: yesData in Brief, 2022
Densities for various Tetramethylammonium hydroxide (TMAH) solutions at different temperatures have been determined based on Archimedes’ principle using a hydrostatic balance and a vitreous body with a defined volume. Due to the toxicity of the compound,
Josef Diebold   +3 more
doaj   +1 more source

Murchison Meteorite Analysis Using Tetramethylammonium Hydroxide (TMAH) Thermochemolysis Under Simulated Sample Analysis at Mars (SAM) Pyrolysis‐Gas Chromatography‐Mass Spectrometry Conditions

open access: yesJournal of Geophysical Research: Planets, 2023
The Sample Analysis at Mars (SAM) instrument aboard the Curiosity Rover at Gale crater can characterize organic molecules from scooped and drilled samples via pyrolysis of solid materials.
A. Mojarro   +9 more
semanticscholar   +1 more source

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

Influence of surface free energy of underlayer on the dissolution of resist film in tetramethylammonium hydroxide (TMAH) aqueous solution

open access: yesPhotomask Technology, 2023
Underlayer is applied to suppress the pattern defects and improve the line width roughness (LWR) of photoresist in the extreme ultraviolet (EUV) lithography.
Jiahao Wang, Y. Sasaki, Takahiro Kozawa
semanticscholar   +1 more source

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