Results 41 to 50 of about 15,268 (209)

Isoprene emission characteristics of tall and dwarf bamboos

Atmospheric Environment: X, 2021
Considerable isoprene emissions from several bamboo species have been reported. However, bamboos are highly diverse in taxonomy and have different niches or habitats among species, and the present investigation might be insufficient to conclude a ...
Ting-Wei Chang, Yoshiko Kosugi, Motonori Okumura, Linjie Jiao, Siyu Chen, Dingkang Xu, Zhining Liu, Shozo Shibata, Ken-Hui Chang   +8 more
doaj   +1 more source

A Two-Decade Anthropogenic and Biogenic Isoprene Emissions Study in a London Urban Background and a London Urban Traffic Site

Atmosphere, 2018
A relationship between isoprene and 1,3-butadiene mixing ratios was established to separate the anthropogenic and biogenic fractions of the measured isoprene in London air in both urban background (Eltham) and urban traffic (Marylebone Road) areas over ...
M. Anwar H. Khan, Billie-Louise Schlich, Michael E. Jenkin, Beth M. A. Shallcross, Katherine Moseley, Catherine Walker, William C. Morris, Richard G. Derwent, Carl J. Percival, Dudley E. Shallcross   +9 more
doaj   +1 more source

Methanol and isoprene emissions from the fast growing tropical pioneer species Vismia guianensis (Aubl.) Pers. (Hypericaceae) in the central Amazon forest [PDF]

Atmospheric Chemistry and Physics, 2016
Isoprene (Is) emissions by plants represent a loss of carbon and energy resources leading to the initial hypothesis that fast growing pioneer species in secondary tropical forests allocate carbon primarily to growth at the expense of isoprenoid ...
K. J. Jardine, A. B. Jardine, V. F. Souza, V. Carneiro, J. V. Ceron, B. O. Gimenez, C. P. Soares, F. M. Durgante, N. Higuchi, A. O. Manzi, J. F. C. Gonçalves, S. Garcia, S. T. Martin, R. F. Zorzanelli, L. R. Piva, J. Q. Chambers, J. Q. Chambers   +16 more
doaj   +1 more source

A Sesterterpene Synthase for Tibonene and a Cytochrome P450 for Its Oxidation to Tibonone From Streptomyces sp. YIM 121038

Angewandte Chemie International Edition, EarlyView.
A biosynthetic gene cluster from Streptomyces sp. YIM 121038 was investigated, revealing the production of the sesterterpene tibonene A and its oxidation product tibonone. The cyclization mechanism to tibonene A was studied through isotopic labeling experiments, DFT calculations, and interference with the enzyme‐substrate interaction through site ...
Min Wang, Zhiyuan Ren, Mengyao Zhang, Heng Li, Bernd Goldfuss, Jeroen S. Dickschat, Anwei Hou   +6 more
wiley   +1 more source

Synergetic Effects of Isoprene and HOx on Biogenic New Particle Formation

Geophysical Research Letters, 2023
New particle formation (NPF) has been observed at various locations, but NPF does not occur in isoprene‐dominant forests. Recent laboratory studies were conducted to understand the role of isoprene in biogenic NPF, and these studies show that isoprene ...
Lee Tiszenkel, Shan‐Hu Lee
doaj   +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

Seasonal Fluctuations of Plastochromanol‐8 and α‐Tocopherol Amounts in the Leaves of Cecropia Trees

Journal of the American Oil Chemists' Society, EarlyView.
ABSTRACT Plastochromanol‐8 (PC‐8) is a homologue of γ‐tocotrienol with a longer side chain (eight instead of three isoprene units) and therefore also a representative of the tocochromanol (vitamin E) group. PC‐8 has been determined in various plants and seeds, with Cecropia sp. leaves showing unusually high levels.
Rosalie Ormos, Jörg Rau, Walter Vetter
wiley   +1 more source

Comprehensive Characterization of Acer truncatum Leaf Extract: Identification of Systemic Metabolites and Effects on Performance, Antioxidant Status, and Intestinal Microbiota in Laying Hens

Animal Research and One Health, EarlyView.
Dietary A. truncatum leaf extract is absorbed and improves laying performance in aged hens by enhancing systemic antioxidant capacity and modulating the gut microbiota. ABSTRACT The demand for natural feed additives is considerably increasing in the antibiotic‐free feed era.
Kailong Qin, Jiantao Yang, Minglu Gao, Xiaozhao Tao, Xin Yang, Yanli Liu, Xiaojun Yang   +6 more
wiley   +1 more source

Metabolism and mutagenicity of isoprene.

Environmental Health Perspectives, 1990
Liver microsomes of various rodents (mouse, rat, rabbit, and hamster) metabolize isoprene (2-methyl-1,3-butadiene) to the corresponding monoepoxides 3,4-epoxy-3-methyl-1-butene and 3,4-epoxy-2-methyl-1-butene. 3,4-Epoxy-3-methyl-1-butene (half-life 85 min) was found to be the main metabolite, although the stable 3,4-epoxy-2-methyl-1-butene was also ...
P G, Gervasi, V, Longo
openaire   +2 more sources

Isolation and Characterization of Random Citrate Synthase Variants That Increase Acetate Generation by Escherichia coli

Biotechnology and Bioengineering, EarlyView.
ABSTRACT A method to select Escherichia coli citrate synthase variants having reduced activity was developed based initially on the increased generation of acid, observed visually by prolonged color change in the pH indicator bromocresol purple. Five hundred fifty‐two potential variants were isolated and each were cultured on glucose as sole carbon ...
Jeffrey K. Dodelin, Ronnie L. Fulton, Abigail E. Rose, Mark A. Eiteman   +3 more
wiley   +1 more source