Results 181 to 190 of about 12,021 (226)

Isolation and physiological properties of methanogenic archaea that degrade tetramethylammonium hydroxide

Applied Microbiology and Biotechnology, 2023
Tetramethylammonium hydroxide (TMAH) is a known toxic chemical used in the photolithography process of semiconductor photoelectronic processes. Significant amounts of wastewater containing TMAH are discharged from electronic industries. It is therefore attractive to apply anaerobic treatment to industrial wastewater containing TMAH.
Akinori Iguchi, Yasuyuki Takemura, Tsuyoshi Danshita, Takuya Kurihara, Masataka Aoki, Saori Hori, Toru Shigematsu, Kazuaki Syutsubo   +7 more
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Synthesis of Polydiethyoxylsiloxane Catalyzed by Dehydrated Tetramethylammonium Hydroxide

Advanced Materials Research, 2012
Tetramethylammonium hydroxide (TMAH) was dehydrated, and then used to catalyze the dimethyl cyclic siloxane ring cleavage and polymerize. The ethanol was used as both the solvent of TMAH and the capping agent to terminate the polymerization. Thus the high quality polydimethylsiloxane was synthesised. The influence of the amount of hexamethyl disiloxane
Xiao Deng Yang, Jian Cheng Wang, Qiu Tian Wang   +2 more
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Effect of tetramethylammonium hydroxide on cotton cellulose compared to sodium hydroxide

Macromolecular Chemistry and Physics, 2000
Cotton fabric was treated with aqueous solutions of tetramethylammonium hydroxide (TMAH) and sodium hydroxide of various concentrations. The sorption of both chemicals, the specific weight of the fabric, the cellulose I - cellulose II transition, the BET surface area, the iodine sorption capacity, and the water retention value were measured and ...
Ildiko Tanczos, Judit Borsa, István Sajó, Krisztina László, Zilia Abigel Juhász, Tünde Tóth   +5 more
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Reduced Anisotropy in Tetramethylammonium Hydroxide Based Silicon Etchants

ECS Transactions, 2017
At sub-10 nm technology nodes, silicon etching is critical to FEOL processes such as FinFET thinning, gap filler removal, pre-III-V deposition etch, and nanowire release etching. The key to developing solutions for these applications is being able to control the anisotropy of the Si etch, or the etch selectivity between Si (111), Si (100), and Si ...
Glenn Westwood, Chien-Pin Sherman Hsu
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Thermally assisted methylation of glycerol by tetramethylammonium hydroxide thermochemolysis

Journal of Analytical and Applied Pyrolysis, 2016
A novel method to rapidly methylate glycerol and generate products having greater value has been demonstrated using tetramethylammonium hydroxide (TMAH) thermochemolysis. Through analysis with GC–MS, it is shown that the reaction between TMAH and glycerol at elevated temperatures produces a series of mono, di and tri-methoxylated glycerols with ...
Derek C. Waggoner, Patrick G. Hatcher
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Experimental Characterization of the Si/Al/Tetramethylammonium Hydroxide System

Journal of The Electrochemical Society, 2001
Electrochemical measurements were used to determine the open-circuit potentials (OCP) of Si/tetramethylammonium hydroxide (TMAH) and Al/Si/TMAH systems. The OCP of Al/Si/TMAH and Si/TMAH were found to be in general agreement with the results obtained by other researchers using linear sweep voltammetry.
A. Tashtoush, L. M. Landsberger, A. Essalik, M. Kahrizi, M. Paranjape, J. F. Currie, A. Pandy   +6 more
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Removal of acid from diesel by tetramethylammonium hydroxide/ethanol

Petroleum Science and Technology, 2016
ABSTRACTNaphthenic acid was removed by tetramethylammonium hydroxide as deacidification agent from diesel, and ethanol was used as extractant. The effect of parameters in the deacidification process was investigated systematically. The process parameters included mass fraction of deacidification agent, volume ratio of deacidification agent to diesel ...
Hu Zhen, Yu Hailian
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Removal of Tetramethylammonium Hydroxide From Solution Using Ion Exchange

IEEE Transactions on Semiconductor Manufacturing, 2013
Ion exchange is used to remove tetramethylammonium hydroxide from an aqueous solution. Both strong acid cation (SAC) and weak acid cation (WAC) exchange resins show excellent uptake of the TMA+ ion. The pseudo-second-order kinetic model fits the data of uptake rate well.
H. M. Citraningrum, J. C. Liu, J. M. Chern   +2 more
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NMR studies of molecular motion in tetramethylammonium hydroxide pentahydrate

Journal of Inclusion Phenomena and Molecular Recognition in Chemistry, 1990
Polycrystalline (CH3)4NOH·5 H2O (I) and (CH3)4NOD·5D2O (II) have been studied by1H NMR lineshapes, second moments and spin-lattice relaxation times and by2H NMR lineshapes as a function of temperature. From low temperatures the first motion to occur is reorientation of the internally rigid (CH3)4N+ ion about a uniqueC3′ axis (Eta = 8.37 kJ/mol forI,Ea =
C. I. Ratcliffe, S. K. Garg, D. W. Davidson   +2 more
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Polyhedral Clathrate Hydrates. XI. Structure of Tetramethylammonium Hydroxide Pentahydrate

The Journal of Chemical Physics, 1966
The crystal structure of tetramethylammonium hydroxide pentahydrate has been determined at 25°C by an analysis of the three-dimensional x-ray-diffraction data. The unit cell is orthorhombic with a=12.57, b=10.96, c=7.91 Å and contains four formula units.
R. K. McMullan, T. C. W. Mak, G. A. Jeffrey   +2 more
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