scholarly journals Improved oxidation of aromatic and aliphatic hydrocarbons using rate enhancing variants of P450Bm3 in combination with decoy molecules

2016 ◽  
Vol 52 (5) ◽  
pp. 1036-1039 ◽  
Author(s):  
Samuel D. Munday ◽  
Osami Shoji ◽  
Yoshihito Watanabe ◽  
Luet-Lok Wong ◽  
Stephen G. Bell
Keyword(s):  
Fatty Acids ◽  
Aliphatic Hydrocarbons ◽  
Product Selectivity ◽  
Active Oxidation ◽  
Highly Active

The addition of perfluorinated fatty acids to the rate accelerating KT2 mutant of P450Bm3 resulted in the highly active oxidation of cyclohexane and benzenes whilst maintaining the product selectivity.

Lipid biogeochemistry in the Laurentian Trough: I—fatty acids, sterols and aliphatic hydrocarbons in rapidly settling particles

1996 ◽  
Vol 25 (3-4) ◽  
pp. 211-225 ◽  
Author(s):  
J.C. Colombo ◽  
N. Silverberg ◽  
J.N. Gearing
Keyword(s):  
Fatty Acids ◽  
Aliphatic Hydrocarbons ◽  
Settling Particles

Mesoporous silica MCM-41 as a highly active, recoverable and reusable catalyst for direct amidation of fatty acids and long-chain amines

2011 ◽  
Vol 13 (4) ◽  
pp. 828 ◽  
Author(s):  
Kenichi Komura ◽  
Yu Nakano ◽  
Mamoru Koketsu
Keyword(s):  
Fatty Acids ◽  
Mesoporous Silica ◽  
Reusable Catalyst ◽  
Highly Active ◽  
Direct Amidation ◽  
Long Chain ◽  
Mcm 41

Further studies ofSchistosoma mansonicercarial stimulation by crude egg lecithin and other lipids

Parasitology ◽  
1974 ◽  
Vol 69 (3) ◽  
pp. 455-463 ◽  
Author(s):  
F. Austin ◽  
P. Frappaolo ◽  
B. Gilbert ◽  
W. Landis ◽  
M. N. da Rosa ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Oleic Acid ◽  
Unsaturated Fatty Acids ◽  
Carboxyl Groups ◽  
Highly Active ◽  
Surface Active Agents ◽  
Egg Lecithin ◽  
Surface Active ◽  
Pure Cholesterol

The stimulus provided to cercariae by the skin fat of their definitive hosts is not the same forSchistosoma mansoniandAustrobilharzia terrigalensis.Cercariae of the former parasite are stimulated by unsaturated fatty acids, those of the latter by cholesterol.A reinvestigation of the penetration stimulant factors present in crude egg lecithin, which contains both cholesterol and free fatty acids as impurities, has shown that the latter are responsible for the stimulus inS. mansoni.The phospholipid fraction is inactive as is pure cholesterol. A little excitation of cercariae is produced by the monoglyceride fraction. These results fully confirm earlier findings.Of surface active agents other than lecithin, stimulatory activity was found only in one product which possessed carboxyl groups. Of the C18acids examined, stearic (18:0) is inactive, oleic (18:1) slightly active, linoleic (18:2) and linolenic (18:3) acids highly active. Oleic acid was shown by GC-mass spectrometry to be the most abundant acid in crude egg lecithin and is probably the main penetration stimulus present.

Synthesis of a highly active oxidation catalyst with improved distribution of titanium coordination states

2016 ◽  
Vol 52 (56) ◽  
pp. 8679-8682 ◽  
Author(s):  
Lizhi Wu ◽  
Xiujuan Deng ◽  
Shufang Zhao ◽  
Hanmei Yin ◽  
Zuoxi Zhuo ◽  
...  
Keyword(s):  
High Performance ◽  
Oxidation Catalyst ◽  
Active Oxidation ◽  
Highly Active ◽  
Optimized Distribution

A facile strategy was carried out to construct a high-performance titanosilicate oxidation catalyst with optimized distribution of titanium coordination states.

scholarly journals Local Electric Fields Dictate Function: The Different Product Selectivity Observed for Fatty Acids Oxidation by Two Deceptively Very Similar P450-Peroxygenases OleT and BSbeta

2021 ◽  
Author(s):  
Kshatresh Dubey ◽  
Shalini Yadav ◽  
Sason Shaik ◽  
Shakir Ali Siddiqui ◽  
Surajit Kalita
Keyword(s):  
Fatty Acids ◽  
Electric Fields ◽  
Product Selectivity

ChemInform Abstract: Mesoporous Silica MCM-41 as a Highly Active, Recoverable and Reusable Catalyst for Direct Amidation of Fatty Acids and Long-Chain Amines.

ChemInform ◽  
2011 ◽  
Vol 42 (32) ◽  
pp. no-no
Author(s):  
Kenichi Komura ◽  
Yu Nakano ◽  
Mamoru Koketsu
Keyword(s):  
Fatty Acids ◽  
Mesoporous Silica ◽  
Reusable Catalyst ◽  
Highly Active ◽  
Direct Amidation ◽  
Long Chain ◽  
Mcm 41

Kinetics and selectivity of methane oxidation on an IrO2(110) film

2021 ◽  
Author(s):  
Christopher J Lee ◽  
Saumye Vashishtha ◽  
Mohammed Shariff ◽  
Fangrong Zou ◽  
Junjie Shi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Methane Oxidation ◽  
High Stability ◽  
Product Formation ◽  
Product Selectivity ◽  
Alkane Dehydrogenation ◽  
Highly Active ◽  
Temperature Programmed ◽  
Temperature Programmed Reaction Spectroscopy ◽  
Temperature Programmed Reaction

Abstract Undercoordinated, bridging O-atoms (Obr) are highly active as H-acceptors in alkane dehydrogenation on IrO2(110) surfaces but transform to HObr groups that are inactive toward hydrocarbons. The low C-H activity and high stability of the HObr groups cause the kinetics and product selectivity during CH4 oxidation on IrO2(110) to depend sensitively on the availability of Obr atoms prior to the onset of product desorption. From temperature programmed reaction spectroscopy (TPRS) and kinetic simulations, we identified two Obr-coverage regimes that distinguish the kinetics and product formation during CH4 oxidation on IrO2(110). Under excess Obr conditions, when the initial Obr coverage is greater than that needed to oxidize all the CH4 to CO2 and HObr groups, complete CH4 oxidation is dominant and produces CO2 in a single TPRS peak between 450 and 500 K. However, under Obr-limited conditions, nearly all the initial Obr atoms are deactivated by conversion to HObr or abstracted after only a fraction of the initially adsorbed CH4 oxidizes to CO2 and CO below 500 K. Thereafter, some of the excess CHx groups abstract H and desorb as CH4 above ~500 K while the remainder oxidize to CO2 and CO at a rate that is controlled by the rate at which Obr atoms are regenerated from HObr during the formation of CH4 and H2O products. We also show that chemisorbed O-atoms (“on-top O”) on IrO2(110) enhance CO2 production below 500 K by efficiently abstracting H from Obr atoms and thereby increasing the coverage of Obr atoms available to completely oxidize CHx groups at low temperature. Our results provide new insights for understanding factors which govern the kinetics and selectivity during CH4 oxidation on IrO2(110) surfaces.

Lipid biogeochemistry in the Laurentian Trough—II. Changes in composition of fatty acids, sterols and aliphatic hydrocarbons during early diagenesis

1997 ◽  
Vol 26 (3-4) ◽  
pp. 257-274 ◽  
Author(s):  
J.C. Colombo ◽  
N. Silverberg ◽  
J.N. Gearing
Keyword(s):  
Fatty Acids ◽  
Early Diagenesis ◽  
Aliphatic Hydrocarbons
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