Results 51 to 60 of about 1,748,305 (217)

Asymmetric Synthesis of Tertiary α‐Aryl Stereocentres in Tetrahydro‐4H‐pyran‐4‐ones Using Pd‐Catalyzed Decarboxylative Asymmetric Protonation

European Journal of Organic Chemistry, EarlyView.
The Pd‐catalyzed decarboxylative asymmetric protonation (DAP) has been developed for sterically hindered tetrahydro‐4H‐pyran‐4‐one derived α‐aryl‐β‐keto esters. A substrate scope of nine examples of DAP showed that substrates containing a di‐ortho methoxy substitution pattern on the aryl ring gave rise to the highest enantioselectivities of up to 85 ...
Fionn McNeill, Joffrey Scriven, Fritz Bahns, Anugam V. Krishna, Julia Bruno‐Colmenarez, Patrick J. Guiry   +5 more
wiley   +1 more source

The use of a supercritical carbon dioxide-based solvent as a cost effective and environmentally sound alternative to current photoresist stripping solvents [PDF]

, 2002
Plan BThe semiconductor industry is facing challenges that involve the use of photoresist stripping solvents. This literature review compares the current solvents used, namely sulfuric acid and hydrogen peroxide and N-methylpyrrolidine, to an alternative
Knutson, Brian
core  

Data comparing the separation and elution of vitamin D metabolites on an ultra performance supercritical fluid chromatography tandem-mass spectrometer (UPSFC-MS/MS) compared to liquid chromatography (LC) and data presenting approaches to UPSFC method optimization

Data in Brief, 2018
The data presented is related to the research article “Analysis of multiple vitamin D metabolites by ultra performance supercritical fluid chromatography-tandem mass spectrometry (UPSFC-MS/MS)” (Jenkinson et al., 2018) [1]. This article will include data
Carl Jenkinson, Angela E. Taylor, Karl-Heinz Storbeck, Martin Hewison   +3 more
doaj   +1 more source

Enhancement of dissolution of atorvastatin through preparation of polymeric solid dispersions using supercritical fluid technology

Research in Pharmaceutical Sciences, 2020
Background and purpose: This study aimed at preparation of solid dispersions in order to enhance dissolution of poorly water-soluble atorvastatin using supercritical CO2 technology.
Bashar Altaani, Rana Obaidat, Walaa Malkawi   +2 more
doaj   +1 more source

Coated and Immobilized Polysaccharides‐Based Stationary Phases for Planar Metallocenes Enantioseparation in Liquid Chromatography

ELECTROPHORESIS, EarlyView.
This study examined 21 new ferrocene and ruthenocene derivatives, including those with planar and central chirality. Their stereochemical behavior was examined using UV‐detected normal‐phase liquid chromatography. Under fixed conditions, eight polysaccharide‐based chiral stationary phases were tested using n‐heptane combined with either 2‐propanol or ...
Florine Wartelle, Rose Leblond, Lisa Bonin, Alina Ghinet, Emmanuelle Lipka   +4 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

Rewiring nutrition: Chemical insights into the physiological and microbiological roles of food's microconstituents

Food Biomacromolecules, EarlyView.
Bidirectional interactions between food‐derived sensory compounds, gut sensing and microbiota, host physiological feedback, and metabolite production within the food matrix collectively shape sensory perception, microbial dynamics, and metabolic health.
Mohammad Nazrul Islam Bhuiyan
wiley   +1 more source

Determination of carotenoids in microalgae using supercritical fluid extraction and chromatography. [Elektronisk resurs]

, 2012
A method was developed based on supercritical fluid chromatography for quantitative determination of carotenoids in extracts of Scenedesmus sp. By utilizing the low backpressure in supercritical fluid chromatography, a C18 column and a 2-ethyl pyridine ...
Turner, Charlotta,, Rodriguez Meizoso, Irene,, Lund University., Abrahamsson, Victor,   +3 more
core   +1 more source

RECENT ADVANCES IN GAS, LIQUID AND SUPERCRITICAL FLUID CHROMATOGRAPHY IN THE CONTEXT OF SUSTAINABLE/ GREEN CHEMISTRY

International Journal of Pharmacy & Integrated Health Sciences
Background: Chromatographic techniques such as gas chromatography (GC), liquid chromatography (LC) and supercritical fluid chromatography (SFC) have long been employed in analytical chemistry. However, using or producing certain organic solvents and non-
Nimra Sohail, Bushra Naureen, Mehmood Asghar, Aziza Sarwar, Aisha Altaf   +4 more
doaj   +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