Results 11 to 20 of about 4,063 (203)

Total Synthesis of (+)-Melonine and (+)-N₄-Oxy Melonine Enabled by an Intramolecular Alkene Diamination Reaction. [PDF]

Angew Chem Int Ed Engl
A complexity‐generating intramolecular alkene diamination constitutes the pivotal step in the enantioselective synthesis of the title natural products featuring a strained, cage‐like pentacyclic architecture. Abstract Among more than four thousand monoterpene indole alkaloids (MIAs) isolated to date, only a few feature a 2,2,3‐trisubstituted indoline ...
Goëlo V, Wang Q, Zhu J.
europepmc   +2 more sources

Functionalization of cellulose fibers and paper with lanthanide-based luminescent core/shell nanoparticles providing 3-level protection for advanced anti-counterfeiting purposes

Materials & Design, 2022
The increasingly wide-spreading falsification of documents, clothing, and packaging has a negative impact on every aspect of the global markets. Therefore, the development of high-quality strategies for materials protection has become a big challenge ...
Agata Szczeszak, Małgorzata Skwierczyńska, Dominika Przybylska, Marcin Runowski, Emilia Śmiechowicz, Aleksandra Erdman, Olena Ivashchenko, Tomasz Grzyb, Piotr Kulpiński, Konrad Olejnik   +9 more
doaj   +1 more source

Morphology of cellulose objects regenerated from cellulose-N-methylmorpholine N-oxide-water solutions [PDF]

, 2009
International audienceThe precipitation in aqueous media of cellulose from solutions in N-methylmorpholine N-oxide (NMMO) hydrates is an important stage in the process of manufacturing of fibres, films and other cellulose objects.
Biganska, Olga, Navard, Patrick
core   +2 more sources

Preparation and Characterization of Regenerated Cellulose Membrane Blended with ZrO₂ Nanoparticles

Membranes, 2021
It is of great significance to search for efficient, renewable, biodegradable and economical membrane materials. Herein, we developed an organic-inorganic hybrid regenerated cellulose membrane (ZrO2/BCM) with excellent hydrophilic and anti-fouling ...
Xin Huang, Feng Tian, Guohong Chen, Fanan Wang, Rengui Weng, Beidou Xi   +5 more
doaj   +1 more source

Development of covalent triazine frameworks as heterogeneous catalytic supports [PDF]

, 2019
Covalent triazine frameworks (CTFs) are established as an emerging class of porous organic polymers with remarkable features such as large surface area and permanent porosity, high thermal and chemical stability, and convenient functionalization that ...
Krishnaraj, Chidharth, Leus, Karen, Tahir, Norini, Van Der Voort, Pascal   +3 more
core   +1 more source

Total Synthesis of Kingianins A, D, and F [PDF]

, 2013
A synthesis fit for a king: The total synthesis of (±)-kingianinsA, D, and F has been achieved in ten steps. Key features include the gram-scale synthesis and partial reduction of a conjugated tetrayne to a (Z,Z,Z,Z)-tetraene, the domino 8π-6π ...
Abe, Aikawa, Alami, Alder, Bandaranayake, Bandaranayake, Bandaranayake, Bandaranayake, Bandaranayake, Banfield, Barbarow, Beaudry, Beaudry, Bell, Bellville, Benson, Chalifoux, Chalifoux, Chou, Corey, Cueto, de Maré, Eade, Ess, Fiandanese, Frank, Gung, Hofmann, Hoheisel, Holme, Holmes, Huisgen, Imperio, Jacobsen, Kendall, Kim, Klärner, Kumar, Kumar, Kurosawa, Kurosawa, Kurosawa, Leverrier, Leverrier, Lim, Lin, Manzo, Marvell, Matovic, Miller, Montierth, Moses, Moses, Métay, Nicolaou, Nicolaou, Nicolaou, Nicolaou, Nishihara, Paquette, Parker, Qian, Sabitha, Schmidt, Sharma, Takahashi, Vail, Valentine, Wang, Wei, Wei   +70 more
core   +1 more source

Ratiometric Upconversion Temperature Sensor Based on Cellulose Fibers Modified with Yttrium Fluoride Nanoparticles

Nanomaterials, 2022
In this study, an optical thermometer based on regenerated cellulose fibers modified with YF3: 20% Yb3+, 2% Er3+ nanoparticles was developed. The presented sensor was fabricated by introducing YF3 nanoparticles into cellulose fibers during their ...
Małgorzata Skwierczyńska, Natalia Stopikowska, Piotr Kulpiński, Magdalena Kłonowska, Stefan Lis, Marcin Runowski   +5 more
doaj   +1 more source

Cellulosic films obtained from the treatment of sugarcane bagasse fibers with N -methylmorpholine- N -oxide (NMMO) [PDF]

, 2009
Ethanol/water organosolv pulping was used to obtain sugarcane bagasse pulp that was bleached with sodium chlorite. This bleached pulp was used to obtain cellulosic films that were further evaluated by Fourier transform infrared (FTIR) spectroscopy ...
A. A. Shatalov, A. R. Gonçalves, A. R. Gonçalves, A. S. Chegolya, Adilson R. Gonçalves, António A. Vicente, B. L. Browing, B. Wielage, C. Devallencourt, D. C. Johnson, D. Fengel, D. Fengel, D. N. S. Hon, D. S. Ruzene, Daniel P. Silva, Denise S. Ruzene, F. Shafizadeh, G. C. Goyal, H. Zhao, H. Zhao, H.-P. Fink, J. Bendzala, José. A. Teixeira, L. Paszner, M. E. Hall, M. Schwanninger, Maria T. Pessoa de Amorim, P. Ghetti, P. R. Hornsby, R. A. Young, S. Aziz, T. N. Kleinert, T. Rosenau, T. Rosenau, X. J. Sun   +34 more
core   +1 more source

A cautionary note on thermal runaway reactions in mixtures of 1-alkyl-3-methylimidazolium ionic liquids and N-methylmorpholine-N-oxide [PDF]

, 2017
Nicht verfügbarN-Methylmorpholine-N-oxide (NMMO) cannot be completely separated by extraction from mixtures with common 1,3-dialkylimidazolium ionic liquids (ILs) due to strong ionic interactions between the two components.
Böhmdorfer, Stefan, Hosoya, Takashi, Potthast, Antje, Rosenau, Thomas, Röder, Thomas   +4 more
core   +2 more sources

A review on raw materials, commercial production and properties of lyocell fiber

Journal of Bioresources and Bioproducts, 2020
As one of the regenerated cellulosic fibers, viscose fiber has the largest output. However, the wastes produced in the manufacturing process are difficult to eliminate, which restricts the development of viscose fiber.
Xiaoya Jiang, Yuanyuan Bai, Xuefeng Chen, Wen Liu   +3 more
doaj   +1 more source