Results 51 to 60 of about 1,752,533 (355)

The formation of polycyclic aromatic hydrocarbons in evolved circumstellar environments [PDF]

, 2010
The formation of Polycyclic Aromatic Hydrocarbons in the circumstellar outflows of evolved stars is reviewed, with an emphasis on carbon stars on the Asymptotic Giant Branch.
Cherchneff, Isabelle
core   +2 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Chemical stability of carbon pool in peatlands dominated by different plant types in Jilin province (China) and its potential influencing factors

Frontiers in Ecology and Evolution, 2023
IntroductionThe peat carbon pool stores 30% of the total global soil carbon accounting for 3–4% of the global land surface. The stability of the peatland carbon pool is a key factor affecting global carbon cycling that is seriously disturbed by climate ...
Jinxin Cong, Chuanyu Gao, Haiyang Zhao, Dongxue Han, Fang Meng, Guoping Wang   +5 more
doaj   +1 more source

Poly(1,3,4-oxadiazoles) via aromatic nucleophilic displacement [PDF]

, 1992
Poly(1,3,4-oxadiazoles) (POX) are prepared by the aromatic nucleophilic displacement reaction of di(hydroxyphenyl) 1,3,4-oxadiazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds. The polymerizations are carried out in
Connell, John W., Hergenrother, Paul M., Wolf, Peter   +2 more
core   +1 more source

Modelling dust extinction in the Magellanic Clouds [PDF]

, 2015
We model the extinction profiles observed in the Small and Large Magellanic clouds with a synthetic population of dust grains consisting by core-mantle particles and a collection of free-flying polycyclic aromatic hydrocarbons.
Aresu, Giambattista, Casu, Silvia, Cecchi-Pestellini, Cesare, Mulas, Giacomo, Zonca, Alberto   +4 more
core   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Bio-Based Aromatic Epoxy Monomers for Thermoset Materials

Molecules, 2017
The synthesis of polymers from renewable resources is a burning issue that is actively investigated. Polyepoxide networks constitute a major class of thermosetting polymers and are extensively used as coatings, electronic materials, adhesives.
Feifei Ng, Guillaume Couture, Coralie Philippe, Bernard Boutevin, Sylvain Caillol   +4 more
doaj   +1 more source

Theoretical Prediction and Explanation of Reaction Site Selectivity in the Addition of a Phenoxy Group to Perfluoropyrimidine, Perfluoropyridazine, and Perfluoropyrazine

Molecules, 2021
Perfluoroaromatics, such as perfluoropyridine and perfluorobenzene, are privileged synthetic scaffolds in organofluorine methodology, undergoing a series of regioselective substitution reactions with a variety of nucleophiles.
Timothy J. Fuhrer, Matthew Houck, Rachel M. Chapman, Scott T. Iacono   +3 more
doaj   +1 more source

The optical spectrum of a large isolated polycyclic aromatic hydrocarbon: hexa-peri-hexabenzocoronene, C42H18

, 2008
The first optical spectrum of an isolated polycyclic aromatic hydrocarbon large enough to survive the photophysical conditions of the interstellar medium is reported.
Damian L. Kokkin, Goto, Gregory F. Metha, Jenniskens, Klaas Nauta, Le Page, Léger, Léger, Masakazu Nakajima, Nigel T. Lucas, Pino, Salama, Sloan, Thomas D. Varberg, Timothy W. Schmidt, Troy, Tyler P. Troy   +16 more
core   +1 more source

Burkholderia: An Untapped but Promising Bacterial Genus for the Conversion of Aromatic Compounds.

Trends in Biotechnology, 2020
Burkholderia, a bacterial genus comprising more than 120 species, is typically reported to inhabit soil and water environments. These Gram-negative bacteria harbor a variety of aromatic catabolic pathways and are thus potential organisms for ...
Raj Morya, Davinia Salvachúa, I. Thakur
semanticscholar   +1 more source