Behavior of the Chiral Herbicide Imazamox in Soils: Enantiomer Composition Differentiates between Biodegradation and Photodegradation

2019 ◽  
Vol 53 (10) ◽  
pp. 5733-5740 ◽  
Author(s):  
Ignaz J. Buerge ◽  
Roy Kasteel ◽  
Astrid Bächli ◽  
Thomas Poiger
Keyword(s):  
Enantiomer Composition

Determination of enantiomer composition of several bicyclic ketal insect pheromone components

1977 ◽  
Vol 3 (1) ◽  
pp. 27-43 ◽  
Author(s):  
T. E. Stewart ◽  
E. L. Plummer ◽  
L. L. McCandless ◽  
J. R. West ◽  
R. M. Silverstein
Keyword(s):  
Insect Pheromone ◽  
Pheromone Components ◽  
Enantiomer Composition

The determination of enantiomer composition of 1-((3-chlorophenyl)-(phenyl)methyl) amine and 1-((3-chlorophenyl)(phenyl)-methyl) urea (Galodif) by NMR spectroscopy, chiral HPLC, and polarimetry

Chirality ◽  
2018 ◽  
Vol 30 (10) ◽  
pp. 1135-1143
Author(s):  
Vera Yu. Kuksenok ◽  
Victoria V. Shtrykova ◽  
Victor D. Filimonov ◽  
Alexandr G. Druganov ◽  
Alexandr A. Bondarev ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chiral Hplc ◽  
Methyl Amine ◽  
Enantiomer Composition

NMR determination of the enantiomer composition of penicillamine using an optically active europium shift reagent

1974 ◽  
Vol 6 (12) ◽  
pp. 669-670 ◽  
Author(s):  
Anthony F. Cockerill ◽  
Geoffrey L. O. Davies ◽  
Roger G. Harrison ◽  
David M. Rackham
Keyword(s):  
Shift Reagent ◽  
Optically Active ◽  
Enantiomer Composition

scholarly journals Enantiomer excesses of rare and common sugar derivatives in carbonaceous meteorites

2016 ◽  
Vol 113 (24) ◽  
pp. E3322-E3331 ◽  
Author(s):  
George Cooper ◽  
Andro C. Rios
Keyword(s):  
Nucleic Acids ◽  
Organic Compounds ◽  
Chemical Reactions ◽  
Prebiotic Chemistry ◽  
Physical Processes ◽  
Sugar Alcohols ◽  
Racemic Mixtures ◽  
Biological Polymers ◽  
Sugar Derivatives ◽  
Enantiomer Composition

Biological polymers such as nucleic acids and proteins are constructed of only one—the d or l—of the two possible nonsuperimposable mirror images (enantiomers) of selected organic compounds. However, before the advent of life, it is generally assumed that chemical reactions produced 50:50 (racemic) mixtures of enantiomers, as evidenced by common abiotic laboratory syntheses. Carbonaceous meteorites contain clues to prebiotic chemistry because they preserve a record of some of the Solar System’s earliest (∼4.5 Gy) chemical and physical processes. In multiple carbonaceous meteorites, we show that both rare and common sugar monoacids (aldonic acids) contain significant excesses of the d enantiomer, whereas other (comparable) sugar acids and sugar alcohols are racemic. Although the proposed origins of such excesses are still tentative, the findings imply that meteoritic compounds and/or the processes that operated on meteoritic precursors may have played an ancient role in the enantiomer composition of life’s carbohydrate-related biopolymers.

Effect of release rate and enantiomeric composition on response to pheromones of Megaplatypus mutatus (Chapuis) in poplar plantations of Argentina and Italy

2013 ◽  
Vol 103 (5) ◽  
pp. 564-569 ◽  
Author(s):  
Hernán Funes ◽  
Eduardo Zerba ◽  
Paola Gonzalez-Audino
Keyword(s):  
Release Rate ◽  
Low Cost ◽  
Field Trials ◽  
Severe Damage ◽  
Baited Traps ◽  
Pheromone Components ◽  
Important Pest ◽  
Poplar Plantations ◽  
Enantiomer Composition ◽  
Megaplatypus Mutatus

AbstractMegaplatypus mutatus (=Platypus sulcatus Chapuis) is an Ambrosia beetle native to South America, which was recently introduced in Italy and its presence there is causing severe damage to the local poplar plantations. The male M. mutatus pheromone is composed of (S)-(+)-6-methyl-5-hepten-2-ol [(+)-sulcatol], 6-methyl-5-hepten-2-one (sulcatone) and 3-pentanol. A series of field trials testing dose, blend and enantiomer composition performed in Argentina and Italy evaluated attraction and found that the optimal release rate of pheromone components as baits in cross vane baited traps (CIPEIN-CV) was 6, 6 and 30 mg day−1 of sulcatone, (+)-sulcatol and 3-pentanol, respectively. It was also determined that racemic sulcatol is as effective as the pure (+)-isomer for the purpose of beetle catch, due to the inert nature of the (−)-isomer allowing the usage of low cost racemic sulcatol instead of highly expensive (+)-sulcatol. The results of our work contribute to the development of pheromone-based local technologies with low environmental impact and low cost for control or monitoring of an important pest.

Enantiomer composition of chiral compounds present in traditional Slovak Tokaj wines

2021 ◽  
Vol 96 ◽  
pp. 103719
Author(s):  
Liudmyla Khvalbota ◽  
Andrea Machyňáková ◽  
Justína Čuchorová ◽  
Katarína Furdíková ◽  
Ivan Špánik
Keyword(s):  
Chiral Compounds ◽  
Enantiomer Composition

Absolute configuration and enantiomer composition of hormosirene

1987 ◽  
Vol 74 (9) ◽  
pp. 448-449 ◽  
Author(s):  
W. Boland ◽  
U. Flegel ◽  
G. Jordt ◽  
D. G. M�ller
Keyword(s):  
Absolute Configuration ◽  
Enantiomer Composition
Sign in / Sign up

Export Citation Format

Share Document