Sequential Oscillations in the Ferroin-Catalyzed Belousov-Zhabotinsky Reaction: The Case of Oxalacetic Acid Substrate

2019 ◽  
Vol 4 (1) ◽  
pp. 451-456
Author(s):  
Tibor Nagy ◽  
József Szászi ◽  
Sándor Kovács ◽  
Miklós Zsuga ◽  
Sándor Kéki
Keyword(s):  
Oxalacetic Acid ◽  
Belousov Zhabotinsky Reaction ◽  
Acid Substrate

Adhesion and Growth of Anaerobic Biofilms on Ion Exchange Resins

1986 ◽  
Vol 21 (4) ◽  
pp. 486-495 ◽  
Author(s):  
R.F.G. Selle Sardi ◽  
W. Bulani ◽  
W.L. Cairns ◽  
N. Kosaric
Keyword(s):  
Metabolic Activity ◽  
Cation Binding ◽  
Fatty Acid Substrate ◽  
Anaerobic Reactors ◽  
Initial Adhesion ◽  
Rapid Changes ◽  
Exchange Resins ◽  
Biofilm Development ◽  
First Time ◽  
Acid Substrate

Abstract Ion exchanger beads are explored as aids in accelerating the development of anaerobic biofilms for use in advanced anaerobic reactors. Initial adhesion and subsequent changes in adhesion and growth of anaerobic biofilms (as reflected in total supported biomass and metabolic activity) were monitored on different ion exchangers (strong cation, strong anion and weak anion) over a period of 12 days. Metabolic activity was recorded for the first time in this type of study using ATP biolumininescence assays which allowed monitoring of rapid changes in the biofilm development. Results indicate that the strong cation exchanger is a better overall substratum for anaerobic biofilm development due to its favorable property of dialent cation binding and adsorption of volatile fatty acid substrate for methanogens.

scholarly journals Esterifications with 2-(Trimethylsilyl)ethyl 2,2,2-Trichloroacetimidate

Organics ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 17-25
Author(s):  
Wenhong Lin ◽  
Shea T. Meyer ◽  
Shawn Dormann ◽  
John D. Chisholm
Keyword(s):  
Carboxylic Acid ◽  
High Yield ◽  
Deuterium Labeling ◽  
Ester Formation ◽  
Acid Substrate

2-(Trimethylsilyl)ethyl 2,2,2-trichloroacetimidate is readily synthesized from 2-trimethylsilylethanol in high yield. This imidate is an effective reagent for the formation of 2-trimethylsilylethyl esters without the need for an exogenous promoter or catalyst, as the carboxylic acid substrate is acidic enough to promote ester formation without an additive. A deuterium labeling study indicated that a β-silyl carbocation intermediate is involved in the transformation.

scholarly journals THE ACTION OF METMYOGLOBIN, OXYGEN, AND MANGANESE ON OXALACETIC ACID

1946 ◽  
Vol 163 (2) ◽  
pp. 573-574
Author(s):  
Birgit Vennesland ◽  
E.A. Evans ◽  
Arista M. Francis
Keyword(s):  
Oxalacetic Acid
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