Results 31 to 40 of about 6,772 (172)

A Strong Lewis Acidic Diethylsilylium Catalyst for Direct Sulfonamidation of Challenging Ketones

Advanced Science, EarlyView.
Low‐substitution‐order silylium ions (R2HSi+) exhibit exceptional Lewis acidic activity. We report diethylsilylium‐catalyzed reductive sulfonamidation of functionalized ketones to access β‐amino esters. The in situ generated ion pair shows enhanced reactivity, with diethylsilane serving as both reductant and precatalyst. The developed protocol proceeds
Woo Hee Kim, Muhammad Israr, You Kyoung Chung, Shinwon Ham, Joonsuk Huh, Han Yong Bae   +5 more
wiley   +1 more source

Quantitative Capillary Supercritical Fluid Chromatography and Supercritical Fluid Extraction of Basic Drugs of Abuse

CHIMIA, 1992
Capillary SFC of basic drugs of abuse have been studied using two different columns, and the results were compared with GC. These results have proved the ability of supercritical CO2 to solubilize and extract basic drugs of interest.
Patrick Edder, Werner Haerdi, Jean-luc Veuthey, Christian Staub   +3 more
doaj   +2 more sources

Multi‐Scale Bionic Structure Constructs Biomass Flame‐Retardant Thermal Insulation Foam Material

Advanced Science, EarlyView.
Inspired by mussel adhesion and hierarchical brick‐and‐mortar architectures, a cellulose‐based biomimetic foam is constructed by anchoring bentonite nanosheets onto a polydopamine‐decorated cellulose nanofiber network. The resulting foam combines low thermal conductivity with intrinsic flame retardancy and full biodegradability, presenting a ...
Jianming Liao, Lijun Fan, Yunyuan Dong, Xuyu Bao, Xiaobin Chen, Qifu Zheng, Guanqing Zhang, Shen Wang, Wei Chen, Min Zhang, Shuaiming He   +10 more
wiley   +1 more source

Characterization of phyto-components with antimicrobial traits in supercritical carbon dioxide and soxhlet Prosopis juliflora leaves extract using GC-MS

Scientific Reports, 2023
This study aimed to screen the bioactive compounds from Prosopis juliflora leaf supercritical fluid extract and to assess its antimicrobial properties. Supercritical carbon dioxide and Soxhlet methods were used for extraction.
Nagaraj M. Naik, M. Krishnaveni, M. Mahadevswamy, M. Bheemanna, Udaykumar Nidoni, Vasant Kumar, K. Tejashri   +6 more
doaj   +1 more source

Synthesis of functionalized polyolefins in a new continuous bench‐scale reactor apparatus

AIChE Journal, EarlyView.
Abstract In‐reactor functionalized polyolefins (FPOs), produced by molecular catalysts, are a new class of polymer materials with applications ranging from high performance adhesives to bitumen compatibilization. In this work, we disclose a procedure for the synthesis of FPOs in a new Continuous Bench‐scale Reactor Apparatus (COBRA).
Miloud Bouyahyi, Job Guzman, Travis Conant, Reggie Tennyson, Christoph Brose, Riccardo Conti, Peter Kolb, Andreas Müller   +7 more
wiley   +1 more source

The enantioselective potential of amylose tris(3‑chloro-5-methylphenyl carbamate)-based chiral stationary phase in sub/supercritical fluid and normal phase liquid chromatography

Journal of Chromatography Open
The enantioselective potential of amylose tris (3‑chloro-5-methylphenylcarbamate) based chiral stationary phase in sub/supercritical fluid chromatography and normal phase liquid chromatography was evaluated.
Denisa Folprechtová, Patricia Maestro Martínez, Květa Kalíková   +2 more
doaj   +1 more source

Fluidos supercríticos em química analítica. III.: aplicações Supercritical fluids in analytical chemistry. III.: applications

Química Nova, 2006
The first two papers in this series described the basic theory involved in supercritical fluid chromatography (SFC), how the technique evolved from gas and liquid chromatography and how the instrumentation was developed.
Emanuel Carrilho, Maria Cecília H. Tavares, Fernando M. Lanças   +2 more
doaj   +1 more source

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

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