Nickel-catalyzed reductive defunctionalization of esters and amides to aromatic hydrocarbons

2017 ◽  
Vol 41 (22) ◽  
pp. 13211-13214 ◽  
Author(s):  
Manoj Mondal ◽  
Pankaj Bharali
Keyword(s):  
Aromatic Hydrocarbons ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Reductive Activation ◽  
One Pot ◽  
Activation Pathway ◽  
Isolation And Characterization ◽  
Insight Into

In two recent studies, nickel has been used in the removal of ester and amide groups to afford aromatic hydrocarbons via one-pot reductive activation followed by tandem C–CO bond cleavage–decarbonylation. Isolation and characterization of key intermediates provide insight into this acyl C–O bond activation pathway.

scholarly journals Substrate-dependent competition and cooperation relationships between Geobacter and Dehalococcoides for their organohalide respiration

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Yongyi Liang ◽  
Qihong Lu ◽  
Zhiwei Liang ◽  
Xiaokun Liu ◽  
Wenwen Fang ◽  
...  
Keyword(s):  
Electron Donors ◽  
Community Stability ◽  
Organohalide Respiration ◽  
Competition And Cooperation ◽  
Free Competition ◽  
Isolation And Characterization ◽  
Geochemical Cycling ◽  
New Strategy ◽  
Insight Into

AbstractObligate and non-obligate organohalide-respiring bacteria (OHRB) play central roles in the geochemical cycling and environmental bioremediation of organohalides. Their coexistence and interactions may provide functional redundancy and community stability to assure organohalide respiration efficiency but, at the same time, complicate isolation and characterization of specific OHRB. Here, we employed a growth rate/yield tradeoff strategy to enrich and isolate a rare non-obligate tetrachloroethene (PCE)-respiring Geobacter from a Dehalococcoides-predominant microcosm, providing experimental evidence for the rate/yield tradeoff theory in population selection. Surprisingly, further physiological and genomic characterizations, together with co-culture experiments, revealed three unique interactions (i.e., free competition, conditional competition and syntrophic cooperation) between Geobacter and Dehalococcoides for their respiration of PCE and polychlorinated biphenyls (PCBs), depending on both the feeding electron donors (acetate/H2 vs. propionate) and electron acceptors (PCE vs. PCBs). This study provides the first insight into substrate-dependent interactions between obligate and non-obligate OHRB, as well as a new strategy to isolate fastidious microorganisms, for better understanding of the geochemical cycling and bioremediation of organohalides.

scholarly journals Isolation and characterization of a bacterial strain Hydrogenophaga sp. PYR1 for anaerobic pyrene and benzo[a]pyrene biodegradation

RSC Advances ◽  
2017 ◽  
Vol 7 (74) ◽  
pp. 46690-46698 ◽  
Author(s):  
Zaisheng Yan ◽  
Yu Zhang ◽  
Huifang Wu ◽  
Mingzhong Yang ◽  
Haichen Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
River Sediments ◽  
Anaerobic Conditions ◽  
Isolation And Characterization ◽  
Polycyclic Aromatic ◽  
Aerobic And Anaerobic ◽  
Aerobic And Anaerobic Conditions

A pyrene-degrading strainHydrogenophagasp. PYR1 was isolated from PAH-contaminated river sediments and found to be able to degrade high molecular weight-polycyclic aromatic hydrocarbons under both aerobic and anaerobic conditions.

New 4-Spiroannulated Tetrahydroisoquinolines by a One-Pot Sequential Procedure. Isolation and Characterization of σ-Alkylpalladium Heck Intermediates

2006 ◽  
Vol 8 (20) ◽  
pp. 4521-4524 ◽  
Author(s):  
Egle M. Beccalli ◽  
Gianluigi Broggini ◽  
Michela Martinelli ◽  
Norberto Masciocchi ◽  
Silvia Sottocornola
Keyword(s):  
Sequential Procedure ◽  
One Pot ◽  
Isolation And Characterization

scholarly journals Isolation and characterization of extracellular vesicles from Broncho-alveolar lavage fluid: a review and comparison of different methods

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Jonathan M. Carnino ◽  
Heedoo Lee ◽  
Yang Jin
Keyword(s):  
Extracellular Vesicles ◽  
Culture Medium ◽  
Bronchoalveolar Lavage Fluid ◽  
Cell Communication ◽  
Lavage Fluid ◽  
Surface Marker ◽  
Cell Culture Medium ◽  
Isolation And Characterization ◽  
Insight Into

Abstract Extracellular vesicles (EVs) are cell-derived membranous vesicles secreted by cells into the extracellular space, which play a role in cell to cell communication. EVs are categorized into 3 groups depending on their size, surface marker, and method of release from the host cell. Recently, EVs have become of interest in the study of multiple disease etiologies and are believed to be potential biomarkers for many diseases. Multiple different methods have been developed to isolate EVs from different samples such as cell culture medium, serum, blood, and urine. Once isolated, EVs can be characterized by technology such as nanotracking analysis, dynamic light scattering, and nanoscale flow cytometry. In this review, we summarize the current methods of EV isolation, provide details into the three methods of EV characterization, and provide insight into which isolation approaches are most suitable for EV isolation from bronchoalveolar lavage fluid (BALF).

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