Results 41 to 50 of about 6,772 (172)

Degradation Mechanisms, Encapsulation‐Based Stabilization, and Analytical Detection of Vitamin A

Journal of the American Oil Chemists' Society, EarlyView.
ABSTRACT Vitamin A is an important lipid‐soluble micronutrient essential for vision, immune function, and overall growth and development. However, vitamin A is unstable and susceptible to environmental factors because of its conjugated structure and inherent chemical reactivity.
Latheesha Abeywardana, Thambaramala V. Gamage, Tanoj K. Singh, Shuaifei Zhao, Amy Logan, Lingxue Kong   +5 more
wiley   +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

The need to merge supercritical fluid chromatography into undergraduate curricula for the twenty-first century

Green Chemistry Letters and Reviews, 2021
Complementarity to liquid and gas chromatography, supercritical fluid chromatography (SFC) is becoming a mainstream separation technique. There is a global demand for more SFC users since ‘green’ method development has become a favorable target for ...
Tricia Naicker, Kamini Govender
doaj   +1 more source

Determination of polar pesticide residues in vegetable and fruit by supercritical fluid chromatography­Q­Orbitrap

Zhongguo shipin weisheng zazhi, 2022
ObjectiveTo establish a method for determination of 12 polar pesticide residues in vegetables and fruits by supercritical fluid chromatography­Q­Orbitrap （SFC­Q­Orbitrap）.MethodsThe samples were extracted with 1% acidified methanol，and the extract was ...
XU Qian, LU Dasheng, QIU Xinlei, FENG Chao, LIN Yuanjie, LE Sunyang, CHEN Yuhang, JIN Yu'e   +7 more
doaj   +1 more source

One century of teaching, research, and innovation in chemical engineering in Mexico: The role of chemical engineering in the background and future of polymer science and industrial production in Mexico

The Canadian Journal of Chemical Engineering, EarlyView.
Timeline of key academic milestones and individuals that shaped chemical engineering at FQ‐UNAM and in Mexico. Abstract One hundred years after the beginning of the teaching of Chemical Engineering in Mexico, which started in 1925 in the former National School of Chemical Sciences, currently Faculty of Chemistry (FQ) at National Autonomous University ...
Patricia Pérez‐Salinas, Alberto Rosas‐Aburto, Eduardo Vivaldo‐Lima   +2 more
wiley   +1 more source

Supercritical fluid chromatography and scale up study

Acta Chimica Slovenica, 2014
The influence of process parameters on supercritical fluid chromatography (SFC) and scale-up on to the preparative scale was investigated. In this scope, dependency of pressure, temperature, type and concentration of modifier, and type of stationary ...
Miha Oman, Petra Kotnik, Mojca Škerget, Željko Knez   +3 more
doaj  

Catalytic Hydrothermal Liquefaction of Polyethylene With Pt/C to Tune Product Selectivity

CleanMat, EarlyView.
Pt/C‐catalyzed hydrothermal liquefaction of polyethylene in supercritical water enables time‐dependent control of product selectivity, producing paraffin‐rich oils at shorter reaction times and aromatic‐enriched products at longer times without external hydrogen. ABSTRACT Hydrothermal liquefaction (HTL) represents a promising thermochemical pathway for
Taofeng Lu, Wan‐Ting Chen
wiley   +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

Essential Oils from Humulus Lupulus scCO₂ Extract by Hydrodistillation and Microwave-Assisted Hydrodistillation

Molecules, 2018
Two different extraction methods were used for a comparative study of essential oils obtained from the Humulus lupulus scCO2 (sc-supercritical) extract: microwave-assisted hydrodistillation (MAHD) and conventional hydrodistillation (HD). As a result, the
Katarzyna Tyśkiewicz, Roman Gieysztor, Marcin Konkol, Jan Szałas, Edward Rój   +4 more
doaj   +1 more source