Results 11 to 20 of about 1,337 (176)

Tetramethylammonium hydroxide (TMAH) treatment of dry-etched trenches on (010) β-Ga2O3 to enhance trench profiles [PDF]

AIP Advances
We demonstrated heated tetramethylammonium hydroxide (TMAH) etching (25 wt. % concentration, at 90 °C) as an effective post-dry-etch treatment for improving dry-etched trench profiles on (010) β-Ga2O3. This treatment successfully converted rough, tapered
Takayoshi Oshima
doaj   +4 more sources

Recent applications of tetramethylammonium hydroxide (TMAH) in the sample preparation for elemental analysis by spectroanalytical techniques

Advances in Sample Preparation
Application of tetramethylammonium hydroxide for the treatment of samples prior to elemental analysis over the last five years is approached in this review article.
Uillian Mozart Ferreira Mata Cerqueira, Juscelia Pereira Santos Alves, Walter Nei Lopes Santos, Bernardo da Silva Pita, Cleber Galvão Novaes, Sulene Alves Araújo, Marcos Almeida Bezerra   +6 more
doaj   +3 more sources

Recommendation on Target Level of Tetramethylammonium Hydroxide (TMAH) in Wastewater Management toward Protection of Aquatic Organisms

Journal of Japan Society on Water Environment, 2019
Marika Adachi, Ryuta ADACHI, Hiromi Andoh, Tasuku Nawaji, Masanori SEKI, Naoaki Yakata   +5 more
exaly   +4 more sources

Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) Porphyrin [PDF]

Sensors
This study utilized tetramethylammonium hydroxide (TMAH) as a substitute for traditional catalysts and successfully incorporated platinum octaethylporphyrin (PtOEP) into SiO2 nanoparticles (PtOEP@SiO2) via the Stöber method.
Hang Lv, Siyuan Cheng, Song Hu, Guohong Zhou   +3 more
doaj   +2 more sources

Insight into the responses of the anammox granular sludge system to tetramethylammonium hydroxide (TMAH) during chip wastewater treatment

Environmental Research
Tetramethylammonium hydroxide (TMAH), an extensively utilized photoresist developer, is frequently present in ammonium-rich wastewater from semiconductor manufacturing, and its substantial ecotoxicity should not be underestimated. This study systematically investigated the effects of TMAH on the anammox granular sludge (AnGS) system and elucidated its ...
Xuming Liu
exaly   +4 more sources

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

Food 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, Premmin Srisakda, Tiyanun Jurkvon, Christophe Zeder, Kunchit Judprasong   +4 more
doaj   +2 more sources

Scottish Seaweeds as Sustainable Sources of Micronutrients: Mineral Composition, Vitamin B₁₂ Content, and Safety Assessment. [PDF]

Food Sci Nutr
A schematic outline of the study showing where seaweeds were harvested, how they were analyzed and then evaluated for micronutrients. ABSTRACT Seaweeds (macroalgae) are increasingly recognized as potential nutrient‐dense components of human diets and promising contributors to sustainable food systems.
Almosa I, Bashir S, Sneddon AA.
europepmc   +2 more sources

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

Applied 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

Analysis of aliphatic biopolymers using thermochemolysis with tetramethylammonium hydroxide (TMAH) and gas chromatography–mass spectrometry [PDF]

Organic Geochemistry, 1998
Selected aliphatic biopolyesters (cutins, cuticles and a suberin) isolated from di erent plants have been analyzed using thermochemolysis with tetramethylammonium hydroxide (TMAH). This method consists of a high-temperature saponification/transesterification, and yields methyl esters of fatty acids and the methyl ethers of alcohols, which are ...
José C. del Rı́o, Patrick G. Hatcher
openalex   +3 more sources

Comparison of tetramethylammonium hydroxide (TMAH), trimethylsulfonium hydroxide (TMSH), and trimethylphenylammonium hydroxide (TMPAH) thermochemolysis for in situ space analysis of organic molecules in planetary environments

Talanta, 2023
One of the main objectives of present and future space exploration missions dedicated to astrobiology is the detection of organic molecules of interest for life (e.g. amino and fatty acids). With this aim, a sample preparation and a gas chromatograph (connected to a mass spectrometer) are generally used.
David Boulesteix, A. Buch, Amy J. Williams, Yuanyuan He, Caroline Freissinet, M. G. Trainer, J. C. Stern, Cyril Szopa   +7 more
  +8 more sources