Results 81 to 90 of about 153,377 (362)

Quantitative analysis of vitamin D and its main metabolites in human milk by supercritical fluid chromatography coupled to tandem mass spectrometry

Analytical and Bioanalytical Chemistry, 2019
A novel method to quantitate vitamin D and its main metabolites (vitamin D3, vitamin D2, and their 25-hydroxy metabolites) in breast milk by supercritical fluid chromatography has been developed and fully validated.
J. Oberson, S. Bénet, K. Redeuil, E. Campos-Giménez   +3 more
semanticscholar   +1 more source

Structure‐Guided Engineering of a Versatile Urethanase Improves Its Polyurethane Depolymerization Activity

Advanced Science, EarlyView.
The crystal structures of UMG‐SP2, a metagenome‐derived urethanase that degrades polyurethane, have been solved at high resolution in both ligand‐free and ligand‐bound forms with an amidase inhibitor or a small carbamate. Structure‐guided engineering of UMG‐SP2 improves the understanding of polyurethane degradation mechanisms and generates enzyme ...
Zhishuai Li, Xu Han, Lin Cong, Parinita Singh, Pedro Paiva, Yannick Branson, Wenshuo Li, Yangyang Chen, Da'san M. M. Jaradat, Frank Lennartz, Thomas Bayer, Louis Schmidt, Ulrike Garscha, Song You, Pedro Alexandrino Fernandes, Maria João Ramos, Uwe T. Bornscheuer, Gert Weber, Ren Wei, Weidong Liu   +19 more
wiley   +1 more source

Enantioselective Analytical- and Preparative-Scale Separation of Hexabromocyclododecane Stereoisomers Using Packed Column Supercritical Fluid Chromatography

Molecules, 2016
Hexabromocyclododecane (HBCDD) is an additive brominated flame retardant which has been listed in Annex A of the Stockholm Convention for elimination of production and use.
Nicole Riddell, Lauren Gayle Mullin, Bert van Bavel, Ingrid Ericson Jogsten, Alan McAlees, Allison Brazeau, Scott Synnott, Alan Lough, Robert McCrindle, Brock Chittim   +9 more
doaj   +1 more source

Electrocarboxylation in supercritical CO2 and CO2-expanded liquids [PDF]

, 2008
In this study, the electrocarboxylation of benzyl chloride in pressurized CO2, or pressurized mixtures of dimethylformamide (DMF) and CO2, was investigated in order to synthesize phenylacetic acid.
Camy, Séverine, Chanfreau, Sébastien, Cognet, Patrick, Condoret, Jean-Stéphane   +3 more
core   +1 more source

Supercritical CO2 Activation Enables an Exceptional Methanol Synthesis Activity Over the Industrial Cu/ZnO/Al2O3 Catalyst

Advanced Science, EarlyView.
A supercritical CO2 activation strategy is demonstrated for the ternary industrial Cu/ZnO/Al2O3 catalyst to synchronously perfect the strong metal–support interaction‐induced Cu–ZnOx interfacial and exposed Cu surface sites by manipulating the adsorbent diffusion kinetics. A dual‐response pathway in methanol synthesis is unraveled.
Yannan Zhou, Jingyun Jiang, Yushun Wang, Ruijie Liu, Shouren Zhang, Jianfang Wang   +5 more
wiley   +1 more source

EKSTRAKSI LILIN DAUN PINUS DENGAN TEKNOLOGI SUPERKRITIKALFLUIDA CO2

Jurnal Penelitian Hasil Hutan (Journal of Forest Products Research), 2017
The objectives of this research is to study the influence of flushing activities on crude waxes yield, and to study the extraction of waxes from pine needles by using supercritical fluid C02 technology.
Bambang Wiyono
doaj   +1 more source

Supercritical fluid chromatography coupled to mass spectrometry: A valuable tool in food analysis [PDF]

, 2021
Producción CientíficaSupercritical fluid chromatography (SFC), although known for several decades, has undergone a growing interest in the last few years fueled by the introduction of modern instruments with improved robustness, and hyphenation to mass ...
Ares Sacristán, Ana María, Bernal del Nozal, José, Martín Gómez, María Teresa, Toribio Recio, Laura   +3 more
core   +1 more source

Supercritical CO2 Extracts and Volatile Oil of Basil (Ocimum basilicum L.) Comparison with Conventional Methods

Separations, 2018
Interest in new products from aromatic plants as medical and nutritional compounds is increasing. The aim of this work was to apply different extraction methods, including the use of supercritical carbon dioxide extraction, and to test the antioxidant ...
José Coelho, Jerson Veiga, Amin Karmali, Marisa Nicolai, Catarina Pinto Reis, Beatriz Nobre, António Palavra   +6 more
doaj   +1 more source

Cellulosic materials as biopolymers and supercritical CO2as a green process: chemistry and applications [PDF]

, 2012
In this review, we describe the use of supercritical CO2 (scCO2) in several cellulose applications. The focus is on different technologies that either exist or are expected to emerge in the near future.
Camy, Séverine, Condoret, Jean-Stéphane, Medina-Gonzalez, Yaocihuatl   +2 more
core   +2 more sources

The role of Moringa oleifera in the development of alternative biofuels, under the concept of an integral one‐tree biorefinery: A minireview

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract The Moringa oleifera oil tree is commonly known as the ‘tree of life’ or the ‘miracle tree’ owing to its multiple benefits for humans. The different parts that make up this tree (leaves, seeds and bark) have been used to treat various ailments, diseases and wounds. However, in recent years this tree is being used by the scientific community to
J. L. Aleman‐Ramirez, Patrick U. Okoye, S. Saldaña‐Trinidad, S. Torres‐Arellano, P. J. Sebastian   +4 more
wiley   +1 more source