scholarly journals The role of urea in the solubility of cellulose in aqueous quaternary ammonium hydroxide

RSC Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 5919-5929
Author(s):  
Mikayla G. Walters ◽  
Albaraa D. Mando ◽  
W. Matthew Reichert ◽  
Christy W. West ◽  
Kevin N. West ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Ammonium Hydroxide ◽  
Tetrabutylammonium Hydroxide

We examine the role of water and urea in cellulose solubility in tetrabutylammonium hydroxide (TBAH).

Quaternary ammonium hydroxide as a metal-free and halogen-free catalyst for the synthesis of cyclic carbonates from epoxides and carbon dioxide

2015 ◽  
Vol 5 (4) ◽  
pp. 2314-2321 ◽  
Author(s):  
Tadashi Ema ◽  
Kazuki Fukuhara ◽  
Takashi Sakai ◽  
Masaki Ohbo ◽  
Fu-Quan Bai ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Quaternary Ammonium ◽  
Ammonium Hydroxide ◽  
Solvent Free ◽  
Cyclic Carbonates ◽  
Tetrabutylammonium Hydroxide ◽  
Metal Free ◽  
Good Catalyst ◽  
Solvent Free Conditions ◽  
Halogen Free

Tetrabutylammonium hydroxide (TBAH) acted as a good catalyst for the formation of cyclic carbonates from epoxides and CO2 under solvent-free conditions.

Use of Nafion membranes in laboratory organic electrosynthesis

1988 ◽  
Vol 53 (12) ◽  
pp. 3164-3170 ◽  
Author(s):  
Jaromír Hlavatý ◽  
Jiří Volke
Keyword(s):  
Glassy Carbon ◽  
Quaternary Ammonium ◽  
Tetrabutylammonium Bromide ◽  
Nafion Membrane ◽  
Carbon Anode ◽  
Tetrabutylammonium Hydroxide ◽  
Nafion Membranes ◽  
Divided Cell ◽  
A Cell ◽  
Tetrabutylammonium Iodide

Electrolysis of quaternary ammonium bromides and iodides in a divided cell with a Nafion membrane yields quaternary polyhalogenides at a carbon anode in water-ethanolic anolytes. The electrodialysis of tetrabutylammonium iodide in a cell with a Nafion membrane enables generation of tetrabutylammonium hydroxide. In electrolytic reduction of nitrobenzene in presence of 1,3-dibromopropane, N-phenylisooxazolidine results in an approx. 60% yield. This electrosynthesis takes place in dimethylformamide with tetrabutylammonium bromide at a glassy-carbon cathode in a divided cell. In the electroreduction of lobelanine hydrogensulfate in a divided cell in acid water-ethanolic media at a lead cathode prevalently lobelanidine has been obtained.

scholarly journals From antimicrobial activity to mechanism of resistance: the multifaceted role of simple quaternary ammonium compounds in bacterial eradication

Tetrahedron ◽  
2016 ◽  
Vol 72 (25) ◽  
pp. 3559-3566 ◽  
Author(s):  
Kevin P.C. Minbiole ◽  
Megan C. Jennings ◽  
Laura E. Ator ◽  
Jacob W. Black ◽  
Melissa C. Grenier ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Compounds ◽  
Bacterial Eradication ◽  
Mechanism Of Resistance ◽  
Ammonium Compounds

Role of the quaternary ammonium ion determinants in allergy to muscle relaxants

1987 ◽  
Vol 79 (4) ◽  
pp. 578-584 ◽  
Author(s):  
A DIDIER ◽  
D CADOR ◽  
P BONGRAND ◽  
R FURSTOSS ◽  
P FOURNERON ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Muscle Relaxants ◽  
Ammonium Ion

Anion conductive poly(arylene ether sulfone)s containing tetra-quaternary ammonium hydroxide on fluorenyl group for alkaline fuel cell application

2012 ◽  
Vol 86 ◽  
pp. 360-365 ◽  
Author(s):  
Dong Wan Seo ◽  
Md. Awlad Hossain ◽  
Dong Hoon Lee ◽  
Young Don Lim ◽  
Soon Ho Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Quaternary Ammonium ◽  
Ammonium Hydroxide ◽  
Alkaline Fuel Cell ◽  
Arylene Ether ◽  
Fuel Cell Application

scholarly journals Simultaneous Quantitation of Isoprenoid Pyrophosphates in Plasma and Cancer Cells Using LC-MS/MS

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3275 ◽  
Author(s):  
Yashpal Chhonker ◽  
Staci Haney ◽  
Veenu Bala ◽  
Sarah Holstein ◽  
Daryl Murry
Keyword(s):  
Ammonium Hydroxide ◽  
Reversed Phase ◽  
Ion Source ◽  
Farnesyl Pyrophosphate ◽  
Ionization Source ◽  
Limit Of Quantification ◽  
Cellular Processes ◽  
Physiological Processes ◽  
Gradient Condition

Isoprenoids (IsoP) are an important class of molecules involved in many different cellular processes including cholesterol synthesis. We have developed a sensitive and specific LC-MS/MS method for the quantitation of three key IsoPs in bio-matrices, geranyl pyrophosphate (GPP), farnesyl pyrophosphate (FPP), and geranylgeranyl pyrophosphate (GGPP). LC-MS/MS analysis was performed using a Nexera UPLC System connected to a LCMS-8060 (Shimadzu Scientific Instruments, Columbia, MD) with a dual ion source. The electrospray ionization source was operated in the negative MRM mode. The chromatographic separation and detection of analytes was achieved on a reversed phase ACCQ-TAG Ultra C18 (1.7 µm, 100 mm × 2.1 mm I.D.) column. The mobile phase consisted of (1) a 10 mM ammonium carbonate with 0.1% ammonium hydroxide in water, and (2) a 0.1% ammonium hydroxide in acetonitrile/methanol (75/25). The flow rate was set to 0.25 mL/min in a gradient condition. The limit of quantification was 0.04 ng/mL for all analytes with a correlation coefficient (r2) of 0.998 or better and a total run time of 12 min. The inter- and intra-day accuracy (85–115%) precision (<15%), and recovery (40–90%) values met the acceptance criteria. The validated method was successfully applied to quantitate basal concentrations of GPP, FPP and GGPP in human plasma and in cultured cancer cell lines. Our LC-MS/MS method may be used for IsoP quantification in different bio-fluids and to further investigate the role of these compounds in various physiological processes.

Effect of Carbonate Anions on Quaternary Ammonium-Hydroxide Interaction

2019 ◽  
Vol 123 (26) ◽  
pp. 15956-15962 ◽  
Author(s):  
Simcha Srebnik ◽  
Srdjan Pusara ◽  
Dario R. Dekel
Keyword(s):  
Quaternary Ammonium ◽  
Ammonium Hydroxide
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