Alkylperoxyl spin adducts of pyrroline-N-oxide spin traps: Experimental and theoretical CASSCF study of the unimolecular decomposition in organic solvent, potential applications in water

2017 ◽  
Vol 30 (10) ◽  
pp. e3677
Author(s):  
Sergiu Lescic ◽  
Hakim Karoui ◽  
Micaël Hardy ◽  
Laurence Charles ◽  
Paul Tordo ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Unimolecular Decomposition ◽  
Spin Traps ◽  
Potential Applications

Facile fractionation of bamboo hydrolysate and characterization of isolated lignin and lignin-carbohydrate complexes

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaodi Wang ◽  
Yongchao Zhang ◽  
Luyao Wang ◽  
Xiaoju Wang ◽  
Qingxi Hou ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Extraction Process ◽  
Water Soluble ◽  
Organic Solvent Extraction ◽  
Glycoside Linkage ◽  
Potential Applications ◽  
Tremendous Amount ◽  
Main Components ◽  
Hemicellulosic Sugars

AbstractAn efficient separation technology for hydrolysates towards a full valorization of bamboo is still a tough challenge, especially regarding the lignin and lignin-carbohydrate complexes (LCCs). The present study aimed to develop a facile approach using organic solvent extraction for efficiently fractionating the main components of bamboo hydrolysates. The high-purity lignin with only a trace of carbohydrates was first obtained by precipitation of the bamboo hydrolysate. The water-soluble lignin (WSL) fraction was extracted in organic solvent through a three-stage organic solvent extraction process, and the hemicellulosic sugars with increased purity were also collected. Furthermore, a thorough characterization including various NMR techniques (31P, 13C, and 2D-HSQC), GPC, and GC-MS was conducted to the obtained lignin-rich-fractions. It was found that the WSL fraction contained abundant functional groups and tremendous amount of LCC structures. As compared to native LCC of bamboo, the WSL fraction exhibited more typical LCC linkages, i.e. phenyl glycoside linkage, which is the main type of chemical linkage between lignin and carbohydrate in both LCC samples. The results demonstrate that organic phase extraction is a highly efficient protocol for the fractionation of hydrolysate and the isolation of LCC-rich streams possessing great potential applications.

Ionic Liquids—An Overview

2004 ◽  
Vol 57 (2) ◽  
pp. 113 ◽  
Author(s):  
Stewart A. Forsyth ◽  
Jennifer M. Pringle ◽  
Douglas R. MacFarlane
Keyword(s):  
Ionic Liquids ◽  
Organic Solvent ◽  
Physical Properties ◽  
Organic Solvent Media ◽  
Potential Applications ◽  
Media Research

Ionic liquids have become an increasingly popular class of solvent in the last decade as the potential applications of these materials become more diverse. Rather than being viewed simply as replacement for conventional organic solvent media, research into ionic liquids has progressed to the deliberate choice and design of these materials for reasons of improved rate, specificity, and yield. Design of ionic liquids centres on the development of novel cations and anions to impart the specific physical properties required for each application. Therefore, the materials being synthesized and studied are also becoming increasingly complex and diverse. Here we provide an overview of ionic liquids generally, and some of their current applications, as well as an introduction to some of the new cations and anions that have been developed for specific properties.

A phenol-formaldehyde polymeric network to generate organic aerogels: synthesis, physicochemical characteristics and potential applications

2018 ◽  
Vol 6 (3) ◽  
pp. 845-852 ◽  
Author(s):  
Halyna Zubyk ◽  
Olena Mykhailiv ◽  
Anthony N. Papathanassiou ◽  
Bogdan Sulikowski ◽  
Elzbieta Zambrzycka-Szelewa ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Dye Removal ◽  
Phenol Formaldehyde ◽  
Physicochemical Characteristics ◽  
Water Sources ◽  
Polymeric Network ◽  
Potential Applications ◽  
Organic Aerogels

Two phenol-formaldehyde organic aerogels were prepared and applied for efficient Cu(ii) and Mn(ii) ion, organic solvent and dye removal from water sources.

scholarly journals Molecules and functions of aesculus chinensis bunge bark volatiles

2018 ◽  
pp. 809 ◽  
Author(s):  
Zuming Li
Keyword(s):  
Organic Solvent ◽  
Skin Care ◽  
Biologically Active ◽  
Active Ingredients ◽  
Active Components ◽  
Pyrolysis Products ◽  
Potential Applications ◽  
Main Components ◽  
Skin Care Products

This paper analyzes the organic solvent extracts of Aesculus chinensis Bunge Bark using TG and Py-GC-MS. The pyrolysis products were analyzed by GC-MS. The results showed that the extracts of Aesculus chinensis Bunge Bark contain a large number of biologically active components, including hydrocarbons, acids, ethers, alcohols, and phenols. The main components in the extract of Aesculus chinensis Bunge Bark are healthy and abundant; the main representatives of the active ingredients are Scopoletin Vanillin, Eugeno, Pyridine, p-Cresol, Indoles, Maltol and Furfural. There are potential applications in bioenergy, biopharmaceuticals, cosmetics, skin care products, and spices.

scholarly journals Study on the Preparation of Nanocellulose Powder and Its Formation Mechanism

2021 ◽  
Author(s):  
Zirui zhu ◽  
Wenbo Wang ◽  
Xiaohui Wang ◽  
Xin Zhao ◽  
Nannan Xia ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Aqueous Suspension ◽  
Drying Methods ◽  
Salting Out ◽  
Colloidal Properties ◽  
Industrial Preparation ◽  
Volatile Organic ◽  
Potential Applications ◽  
Powder Formation ◽  
Colloidal State

Abstract Nanocellulose is a kind of cellulose based nano material with fantastic properties and numerous potential applications. However, due to the fact that nanocellulose exhibits colloidal properties when its concentration is high, the drying of nanocellulose has always been an urgent problem to be solved. To address this problem, the precipitation and drying mechanism of cellulose nanocrystal (CNC), one of the most common types of nanocellulose, was studied in this paper. The CNC was precipitated from the aqueous suspension by salting out to avoid the CNC colloidal state when concentrated in water. The obtained CNC precipitation with a small amount of water and the actively added electrolyte was dehydrated and purified by solvent displacement with volatile organic. Then CNC powder can be taken shape by drying the mixture of CNC and organic solvent with different drying methods. The mechanism of CNC precipitation from aqueous suspension and CNC powder formation from volatile organic solvent was studied. After comprehensive consideration, a method for preparing re-dispersible CNC powder was established, and the properties of this powder were studied, that provided a solution for the industrial preparation and application of nanocellulose.

Effection of Wood Extractives on Burning Time of Fuel for Add-On Bioenergy

2012 ◽  
Vol 164 ◽  
pp. 52-54
Author(s):  
Wan Xi Peng ◽  
Le Cui
Keyword(s):  
Functional Analysis ◽  
Organic Solvent ◽  
Biomass Energy ◽  
Burning Time ◽  
Wood Extractives ◽  
Potential Applications ◽  
Application Prospects

In order to explore the application prospects of wood extractives in the biomass energy, the several wood extractives were isolated by organic solvent. The results of functional analysis suggested that these wood extractives could accelerate benzene-alcohol’s burning, but played a certain role in inhibiting ether’s burning. This reslut revealed that the wood extractives had huge potential applications in the field of add-on bioenergy.

An in situ and ex situ TEM study of the formation of thin cobalt silicide films by molecular beam epitaxy on the silicon (100) surface

1988 ◽  
Vol 46 ◽  
pp. 884-885
Author(s):  
D. Loretto ◽  
J. M. Gibson ◽  
S. M. Yalisove ◽  
R. T. Tung
Keyword(s):  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Defect Density ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Ex Situ ◽  
Metal Base ◽  
In Situ Experiments ◽  
Potential Applications

The cobalt disilicide/silicon system has potential applications as a metal-base and as a permeable-base transistor. Although thin, low defect density, films of CoSi2 on Si(111) have been successfully grown, there are reasons to believe that Si(100)/CoSi2 may be better suited to the transmission of electrons at the silicon/silicide interface than Si(111)/CoSi2. A TEM study of the formation of CoSi2 on Si(100) is therefore being conducted. We have previously reported TEM observations on Si(111)/CoSi2 grown both in situ, in an ultra high vacuum (UHV) TEM and ex situ, in a conventional Molecular Beam Epitaxy system.The procedures used for the MBE growth have been described elsewhere. In situ experiments were performed in a JEOL 200CX electron microscope, extensively modified to give a vacuum of better than 10-9 T in the specimen region and the capacity to do in situ sample heating and deposition. Cobalt was deposited onto clean Si(100) samples by thermal evaporation from cobalt-coated Ta filaments.

Microstructure of laser-irradiated, conducting Kapton polyimide

1995 ◽  
Vol 53 ◽  
pp. 502-503
Author(s):  
D. L. Callahan ◽  
Z. Ball ◽  
H. M. Phillips ◽  
R. Sauerbrey
Keyword(s):  
Electron Microscopy ◽  
Phase Transition ◽  
Transmission Electron Microscopy ◽  
Cross Section ◽  
Film Surface ◽  
Cross Sectional ◽  
General Utility ◽  
Transmission Electron ◽  
Considerable Debate ◽  
Potential Applications

Ultraviolet laser-irradiation can be used to induce an insulator-to-conductor phase transition on the surface of Kapton polyimide. Such structures have potential applications as resistors or conductors for VLSI applications as well as general utility electrodes. Although the percolative nature of the phase transformation has been well-established, there has been little definitive work on the mechanism or extent of transformation. In particular, there has been considerable debate about whether or not the transition is primarily photothermal in nature, as we propose, or photochemical. In this study, cross-sectional optical microscopy and transmission electron microscopy are utilized to characterize the nature of microstructural changes associated with the laser-induced pyrolysis of polyimide.Laser-modified polyimide samples initially 12 μm thick were prepared in cross-section by standard ultramicrotomy. Resulting contraction in parallel to the film surface has led to distortions in apparent magnification. The scale bars shown are calibrated for the direction normal to the film surface only.

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