Results 51 to 60 of about 14,306 (219)

Chemical Ionization Mass Spectrometry: Fundamental Principles, Diverse Applications, and the Latest Technological Frontiers

Mass Spectrometry Reviews, EarlyView.
ABSTRACT The review examines the evolution of chemical ionization mass spectrometry (CI‐MS), a technique developed in 1966 by Field and Munson. CI is a soft‐ionization method that produces more intense molecular ions with less fragmentation than electron ionization (EI).
Malvika Dutt, Adriana Arigò, Giorgio Famiglini, Pierangela Palma, Achille Cappiello   +4 more
wiley   +1 more source

The Speciated isoprene emission model with the MEGAN algorithm for China (SieMAC) [PDF]

Geoscientific Model Development
Isoprene is the dominant non-methane Volatile Organic Compound (VOC) emitted from terrestrial ecosystems and plays an important role in ozone chemistry. Understanding isoprene emissions is critical for controlling air pollution. The Model of Emissions of
S. Xi, Y. Wang, X. Yuan, Z. Feng, F. Zhao, Y. Zhang, X. Wang   +6 more
doaj   +1 more source

Comprehensive Insights into Natural Bioactive Compounds: From Chemical Diversity and Mechanisms to Biotechnological Innovations and Applications

ChemistryOpen, EarlyView.
Natural products derived from plants, animals, fungi, bacteria, and minerals contain diverse bioactive classes such as alkaloids, flavonoids, terpenoids, saponins, tannins, and phenolics. These natural products work through different mechanisms, including ROS inhibition, NF‐κB suppression, and cytokine regulation, and exhibit wide applications across ...
Sajid Ali, Atif Ali Khan Khalil, Muhammad Saeed Akhtar, Adnan Amin, Wajid Zaman   +4 more
wiley   +1 more source

The production of isoprene from cellulose using recombinant Clostridium cellulolyticum strains expressing isoprene synthase

MicrobiologyOpen, 2020
Isoprene is an important bulk chemical which is mostly derived from fossil fuels. It is used primarily for the production of synthetic rubber. Sustainable, biotechnology‐based alternatives for the production of isoprene rely on the fermentation of sugars
Christian Janke, Stefan Gaida, Stefan Jennewein   +2 more
doaj   +1 more source

Influence of crosslinker on the properties of terpene‐based poly(high internal phase emulsion)s

Polymer International, EarlyView.
Myrcene was polymerized and crosslinked with hydrophilic monomeric and oligomeric dimethacrylates within high internal phase emulsions to produce hierarchically porous bio‐based poly(high internal phase emulsion)s with tuned morphology and mechanical properties.
Rumeysa Beyaz, Stanko Kramer, Burcu Kekevi, E. Hilal Mert, Irena Pulko, Peter Krajnc   +5 more
wiley   +1 more source

Ozarks Isoprene Experiment (OZIE): Measurements and modeling of the “isoprene volcano” [PDF]

Journal of Geophysical Research: Atmospheres, 2005
The Ozarks Isoprene Experiment (OZIE) was conducted in July 1998 in Missouri, Illinois, Indiana, and Oklahoma. OZIE was designed to investigate the presumed strong isoprene emission rates from the Missouri Ozarks, where there is a high density of oak trees that are efficient isoprene emitters.
Wiedinmyer, Christine, Greenberg, Jim, Guenther, Alex, Hopkins, Brian, Baker, Kirk, Geron, Chris, Palmer, Paul I, Long, Bryan P, Turner, Jay R, Pétron, Gabrielle, Harley, Peter, Pierce, Thomas E, Lamb, Brian, Westberg, Hal, Baugh, William, Koerber, Mike, Janssen, Mark   +16 more
openaire   +5 more sources

Robust β‐myrcene block copolymer elastomeric vitrimers

Polymer International, EarlyView.
Myrcene‐based vitrimeric elastomers were compared: statistical (poly(styrene‐stat‐myrcene‐stat‐AAEMA)] versus ‘hard–soft’ diblock (poly(styrene)‐block‐poly(myrcene‐co‐AAEMA)). The diblock's ability to anchor the glassy poly(styrene) blocks in a self‐assembled microstructure was effective – leading to four times higher tensile stress and ten times ...
Chong Yang Du, Farhad Asempour, Milan Marić   +2 more
wiley   +1 more source

Nocturnal isoprene oxidation over the Northeast United States in summer and its impact on reactive nitrogen partitioning and secondary organic aerosol [PDF]

Atmospheric Chemistry and Physics, 2009
Isoprene is the largest single VOC emission to the atmosphere. Although it is primarily oxidized photochemically during daylight hours, late-day emissions that remain in the atmosphere at sunset undergo oxidation by NO₃ in ...
S. S. Brown, J. A. deGouw, C. Warneke, T. B. Ryerson, W. P. Dubé, E. Atlas, R. J. Weber, R. E. Peltier, J. A. Neuman, J. M. Roberts, A. Swanson, F. Flocke, S. A. McKeen, J. Brioude, R. Sommariva, M. Trainer, F. C. Fehsenfeld, A. R. Ravishankara   +17 more
doaj  

Kinetics of anionic polymerization of β‐myrcene in hydrocarbon solvents

Polymer International, EarlyView.
The process of anionic polymerization of β‐myrcene in hydrocarbon solvents was examined by kinetic studies and quantum chemical calculations. Abstract The kinetics of anionic polymerization of β‐myrcene initiated by sec‐butyllithium were examined in saturated and unsaturated hydrocarbon solvents, i.e. cyclohexane, cyclohexene, 4‐vinylcyclohexene and dl‐
Alexander Rösler, Steffen M Weidner, Tillmann Klamroth, Axel HE Müller, Helmut Schlaad   +4 more
wiley   +1 more source

Observation-constrained kinetic modeling of isoprene SOA formation in the atmosphere [PDF]

Atmospheric Chemistry and Physics
Isoprene has the largest global non-methane hydrocarbon emission, and the oxidation of isoprene plays a crucial role in the formation of secondary organic aerosol (SOA).
C. Shen, X. Yang, J. Thornton, J. Shilling, C. Bi, G. Isaacman-VanWertz, H. Zhang   +6 more
doaj   +1 more source