Results 31 to 40 of about 5,754 (198)

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

A DFT Study on the Mechanism of Selective Formation of Substituted Azepines From 1‐Azabutadienes and Cyclopropanes

Chemistry – A European Journal, EarlyView.
The origin of the unusual regioselectivity in the Mg‐catalyzed cyclization of azadiene‐type imines with cyclopropanes is elucidated by DFT calculations. Although five‐membered rings are typically favored, energy decomposition analysis reveals that severe steric congestion induces a highly distorted transition state, rendering the five‐membered pathway ...
Ryo Kobayashi, Chao Wang, Shuto Kosuge, Yuji Matsuya, Kenji Sugimoto, Keiichi Hirano   +5 more
wiley   +1 more source

Modification of POSS and their tribological properties and resistant to space atomic oxygen irradiation as lubricant additive of multialkylated cyclopentanes

Friction
Developing functional additive resistant to space atomic oxygen (AO) irradiation through simple molecular design and chemical synthesis to enhance the lubricating performance of multialkylated cyclopentanes (MACs) oil is a significant challenge.
Xingwei Wang, Chaoyang Zhang, Chen Zhao, Yijing Liang, Ming Zhang, Wufang Yang, Bo Yu, Qiangliang Yu, Meirong Cai, Feng Zhou, Weimin Liu   +10 more
doaj   +1 more source

Clathrate hydrate crystallization

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source

Is the Ring Conformation the Most Critical Parameter in Lipase-Catalysed Acylation of Cycloalkanols? [PDF]

, 2004
Financial support of this work by the Spanish Ministerio de Ciencia y Tecnología (Project No. PPQ-2001-2683) and by Principado de Asturias (Project No.
Gotor Santamaría, Vicente Miguel, Lavandera García, Iván, Levy, Laura Mariana   +2 more
core   +2 more sources

Total Synthesis of Novel Oxylipins: Plasmodiophorols A, C, and Epimers

European Journal of Organic Chemistry, EarlyView.
The first total syntheses of plasmodiophorols A and C, recently identified α‐linolenic acid‐derived oxylipins, were achieved from chiral cyclopentafuranone in 12–13 steps. The routes use enzymatic desymmetrization, epimerization, and diastereoselective Grignard addition, providing stereocontrolled access to the natural products and reliable standards ...
Alexandre Guy, Aurélien Lebrun, Thierry Durand, Camille Oger   +3 more
wiley   +1 more source

1,3-Dicarbonyl compounds in stereoselective domino and multicomponent reactions

, 2010
International audienceModern organic synthesis focuses on the discovery and the development of stereoselective multiple bond-forming transformations allowing the creation of several covalent bonds in a single operation.
Bonne, Damien, Constantieux, Thierry, Coquerel, Yoann, Rodriguez, Jean   +3 more
core   +4 more sources

Enantioselective nickel-catalyzed intramolecular allylic alkenylations enabled by reversible alkenylnickel E/Z isomerization [PDF]

, 2017
Enantioselective nickel-catalyzed arylative cyclizations of substrates containing a Z-allylic phosphate tethered to an alkyne are described. These reactions give multisubstituted chiral aza- and carbocycles, and are initiated by the addition of an ...
Akiyama, Alexakis, Allen, Börjesson, Cherney, Chung, Clarke, Comins, Consiglio, Consiglio, Consiglio, Daini, Gao, Gao, Gao, Gomez-Bengoa, Hamilton, Harris, Hartwig, Harutyunyan, Hiyama, Huggins, Indolese, Jung, Kita, Kobayashi, Kobayashi, Langlois, Lee, Li, Lin, Liu, Miura, Miura, Miura, Moberg, Murakami, Nagel, Ohmiya, Ohmiya, Schrems, Shields, Shimada, Shintani, Sidera, Son, Sperger, Sprinz, Srinivas, Taylor, Taylor, Tollefson, Tollefson, Tosatti, Trost, Trost, Trost, von Matt, Wang, Wisniewska, Yamamoto, Yonova, Youn, Zeng, Zhang, Zhou   +65 more
core   +2 more sources

Integrated Flue‐Gas Heat Recovery for Optimized Steam and Power Generation Using Organic Rankine Cycle (ORC): A Technical and Economic Assessment

Energy Science &Engineering, EarlyView.
Integration of a steam cycle with an existing gas turbine increased efficiency from 32% to 51%, reducing fuel consumption by 21.4% and CO2 emissions by 18.6%. The modification generated USD 13.9 million annual savings and lowered the Levelized Cost of Energy to 38.7 USD/MWh, with a 3‐year payback.
Vahid Pirouzfar, Anashe Aghajani, Chia‐Hung Su   +2 more
wiley   +1 more source

Synthetic Studies on Cyclopentane Derivatives

Agricultural and Biological Chemistry, 1969
An alternative route to dl-prostaglandin-B1 using the Grignard reaction of 2-(6′-tert-butyloxycarbonylhexyl)-3-methoxy-2-cyclopenten-1-one(XII) with 3-tetrahydropyranyloxy-1-octyne was developed.An easy synthesis of dihydrojasmone was also described.
Junki KATSUBE, Masanao MATSUI
openaire   +3 more sources