Characterization of the Unimolecular Water Elimination Reaction from 1-Propanol, 3,3,3-Propan-1-ol-d3, 3,3,3-Trifluoropropan-1-ol, and 3-Chloropropan-1-ol

2009 ◽  
Vol 113 (37) ◽  
pp. 10013-10023 ◽  
Author(s):  
Heather A. Ferguson ◽  
Caroline L. Parworth ◽  
Traci Berry Holloway ◽  
Aaron G. Midgett ◽  
George L. Heard ◽  
...  
Keyword(s):  
Elimination Reaction ◽  
Water Elimination

Characterization of the 1,1-HF Elimination Reaction from the Competition between the 1,1-HF and 1,2-DF Unimolecular Elimination Reactions of CD3CD2CHF2

2015 ◽  
Vol 119 (17) ◽  
pp. 3887-3896 ◽  
Author(s):  
Leah N. Wormack ◽  
Meghan E. McGreal ◽  
Corey E. McClintock ◽  
George L. Heard ◽  
D. W. Setser ◽  
...  
Keyword(s):  
Elimination Reaction ◽  
Elimination Reactions

scholarly journals Synthesis and characterization of adsorbents for the elimination of nitrates and bromates from water aiming to develop a continuous oxyanion water elimination system

2020 ◽  
Author(s):  
M. Azaro ◽  
F. M. Flores ◽  
M. Casella ◽  
C. Rodríguez ◽  
R. M. Torres Sánchez ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Diatomaceous Earth ◽  
Direct Relationship ◽  
Low Cost ◽  
Batch Systems ◽  
Groundwater Samples ◽  
Water Elimination ◽  
Standard Solution ◽  
Removal System

Abstract It is known that the excess of oxyanions such as NO3- and BrO3- in drinking water affects its quality. In this work, three adsorbents (montmorillonite (Mt), silica (Si), and diatomaceous earth) loaded with hexadecyl- (H) and octadecyl-trimethylammonium (O) were used to remove these oxyanions from aqueous solutions by adsorption. In batch systems, the highest NO3- removal was obtained with Mt modified with H and O (Mt-H and Mt-O), attaining 33 and 50%, respectively, while for BrO3- removal Si modified with H and O, Si-H and Si-O samples, reached 38 and 42%, respectively. A direct relationship between the adsorption capacity of NO3- and BrO3- and the mass of the adsorbent was found in column filtration tests with Mt-O and Mt-H samples in standard solution and real groundwater samples. The adsorption capacity of the column, in the groundwater sample, remained constant after two reuses.The results obtained are promising for the development of a continuous oxyanion removal system containing the low-cost clay Mt modified with either H or O.

scholarly journals Purification and characterization of human hepatic cysteine-conjugate β-lyase

1986 ◽  
Vol 235 (2) ◽  
pp. 569-575 ◽  
Author(s):  
H Tomisawa ◽  
S Ichihara ◽  
H Fukazawa ◽  
N Ichimoto ◽  
M Tateishi ◽  
...  
Keyword(s):  
Human Liver ◽  
Gel Filtration ◽  
Deae Cellulose ◽  
Elimination Reaction ◽  
Purification And Characterization ◽  
Ph Optimum ◽  
Beta Elimination ◽  
Alpha Beta ◽  
Hydroxyapatite Gel

Cysteine-conjugate beta-lyase (EC 4.4.1.13) was purified about 880-fold from human liver obtained post mortem. The purification procedure included (NH4)2SO4 precipitation, chromatography on DEAE-cellulose and hydroxyapatite, gel filtration on Sephadex G-200, and chromatofocusing. The purified enzyme cleaves the C-S bond of several S-aryl-L-cysteines to yield equimolar amounts of thiols, pyruvic acid and ammonia via an alpha beta-elimination reaction. The Mr of the enzyme was estimated to be 88,000 by gel filtration. The enzyme is thermolabile, has a pH optimum of 8.5, and an apparent Km of 0.7 mM towards S-(p-bromophenyl)-L-cysteine. The enzyme requires pyridoxal 5′-phosphate as a cofactor, and hence the enzyme activity was completely abolished by hydroxylamine. No effect of EDTA or thiol-blocking reagents was observed on the activity of the enzyme.

Synthesis and characterization of a novel fluorinated bismaleimide via a nucleophilic addition–elimination reaction and its polymeric networks

RSC Advances ◽  
2015 ◽  
Vol 5 (92) ◽  
pp. 75547-75554 ◽  
Author(s):  
Jingbo Wu ◽  
Yang Xi ◽  
Gregory T. McCandless ◽  
Oleg V. Kulikov ◽  
Remya Menon ◽  
...  
Keyword(s):  
Nucleophilic Addition ◽  
Synthesis And Characterization ◽  
Elimination Reaction ◽  
Polymeric Networks

A novel fluorinated bismaleimide, OFCP-BMI, was designed and readily synthesized via the nucleophilic addition–elimination reaction of octafluorocyclopentene with maleimide-functionalized phenol.

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