Synthesis and Evaluation of Superior Calcium and Mercury Transport by Simple Monocarboxylic Acids of Kemp’s Triacid

1999 ◽  
Vol 72 (4) ◽  
pp. 865-873 ◽  
Author(s):  
Takuji Hirose ◽  
Zhen-He Wang ◽  
Bruce W. Baldwin ◽  
Tadafumi Uchimaru ◽  
Kazuyuki Kasuga
Keyword(s):  
Monocarboxylic Acids ◽  
Mercury Transport ◽  
Kemp's Triacid

ChemInform Abstract: Synthesis and Evaluation of Superior Calcium and Mercury Transport by Simple Monocarboxylic Acids of Kemp′s Triacid

ChemInform ◽  
2010 ◽  
Vol 30 (33) ◽  
pp. no-no
Author(s):  
Takuji Hirose ◽  
Zhen-He Wang ◽  
Bruce W. Baldwin ◽  
Tadafumi Uchimaru ◽  
Kazuyuki Kasuga
Keyword(s):  
Monocarboxylic Acids ◽  
Mercury Transport

Extraction of monocarboxylic acids from diluted solutions by polyethylene glycol

2018 ◽  
pp. 303-307
Author(s):  
I. V. Zinovyeva ◽  
◽  
Yu. A. Zakhodyayeva ◽  
A. A. Voshkin ◽  
◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Monocarboxylic Acids

Development of Pseudo-C2-symmetric Chiral Binaphthyl Monocarboxylic Acids for Enantioselective C(sp3)–H Functionalization Reactions under Rh(III) Catalysis

ACS Catalysis ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 4271-4277
Author(s):  
Yoshimi Kato ◽  
Luqing Lin ◽  
Masahiro Kojima ◽  
Tatsuhiko Yoshino ◽  
Shigeki Matsunaga
Keyword(s):  
Monocarboxylic Acids

scholarly journals An Integrated Investigation of Atmospheric Gaseous Elemental Mercury Transport and Dispersion Around a Chlor-Alkali Plant in the Ossola Valley (Italian Central Alps)

Toxics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 172
Author(s):  
Laura Fantozzi ◽  
Nicoletta Guerrieri ◽  
Giovanni Manca ◽  
Arianna Orrù ◽  
Laura Marziali
Keyword(s):  
Elemental Mercury ◽  
Background Concentration ◽  
Dispersion Pattern ◽  
Central Alps ◽  
Gaseous Elemental Mercury ◽  
Mercury Transport ◽  
Close Proximity ◽  
Potential Impact ◽  
Hg Accumulation

We present the first assessment of atmospheric pollution by mercury (Hg) in an industrialized area located in the Ossola Valley (Italian Central Alps), in close proximity to the Toce River. The study area suffers from a level of Hg contamination due to a Hg cell chlor-alkali plant operating from 1915 to the end of 2017. We measured gaseous elemental Hg (GEM) levels by means of a portable Hg analyzer during car surveys between autumn 2018 and summer 2020. Moreover, we assessed the long-term dispersion pattern of atmospheric Hg by analyzing the total Hg concentration in samples of lichens collected in the Ossola Valley. High values of GEM concentrations (1112 ng m−3) up to three orders of magnitude higher than the typical terrestrial background concentration in the northern hemisphere were measured in the proximity of the chlor-alkali plant. Hg concentrations in lichens ranged from 142 ng g−1 at sampling sites located north of the chlor-alkali plant to 624 ng g−1 in lichens collected south of the chlor-alkali plant. A north-south gradient of Hg accumulation in lichens along the Ossola Valley channel was observed, highlighting that the area located south of the chlor-alkali plant is more exposed to the dispersion of Hg emitted into the atmosphere from the industrial site. Long-term studies on Hg emission and dispersion in the Ossola Valley are needed to better assess potential impact on ecosystems and human health.

scholarly journals Chiroptical activity of hydroxycarboxylic acids with implications for the origin of biological homochirality

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Jana Bocková ◽  
Nykola C. Jones ◽  
Uwe J. Meierhenrich ◽  
Søren V. Hoffmann ◽  
Cornelia Meinert
Keyword(s):  
Amino Acids ◽  
Lactic Acid ◽  
Organic Molecules ◽  
Building Blocks ◽  
Aliphatic Chain ◽  
Monocarboxylic Acids ◽  
Hydroxycarboxylic Acids ◽  
Polarised Light ◽  
Suitable Target ◽  
Anisotropy Spectra

AbstractCircularly polarised light (CPL) interacting with interstellar organic molecules might have imparted chiral bias and hence preluded prebiotic evolution of biomolecular homochirality. The l-enrichment of extra-terrestrial amino acids in meteorites, as opposed to no detectable excess in monocarboxylic acids and amines, has previously been attributed to their intrinsic interaction with stellar CPL revealed by substantial differences in their chiroptical signals. Recent analyses of meteoritic hydroxycarboxylic acids (HCAs) – potential co-building blocks of ancestral proto-peptides – indicated a chiral bias toward the l-enantiomer of lactic acid. Here we report on novel anisotropy spectra of several HCAs using a synchrotron radiation electronic circular dichroism spectrophotometer to support the re-evaluation of chiral biomarkers of extra-terrestrial origin in the context of absolute photochirogenesis. We found that irradiation by CPL which would yield l-excess in amino acids would also yield l-excess in aliphatic chain HCAs, including lactic acid and mandelic acid, in the examined conditions. Only tartaric acid would show “unnatural” d-enrichment, which makes it a suitable target compound for further assessing the relevance of the CPL scenario.

The infrared spectra of some aliphatic monocarboxylic acids in the 700-350 cm−1 region

1964 ◽  
Vol 20 (4) ◽  
pp. 685-693 ◽  
Author(s):  
F.F. Bentley ◽  
M.T. Ryan ◽  
J.E. Katon
Keyword(s):  
Infrared Spectra ◽  
Monocarboxylic Acids

scholarly journals The Uptake of Monocarboxylic Acids by Rat Diaphragm

1961 ◽  
Vol 236 (4) ◽  
pp. 1019-1022
Author(s):  
Ernest C. Foulkes ◽  
C.M. Paine
Keyword(s):  
Rat Diaphragm ◽  
Monocarboxylic Acids
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