Results 21 to 30 of about 110,919 (317)

Synthesis, enzyme inhibition and anticancer investigation of unsymmetrical 1,3-disubstituted ureas [PDF]

Journal of the Serbian Chemical Society, 2014
In this research work seventeen urea derivatives, including five new derivatives N-mesityl-N'-(3-methylphenyl)urea (2), N-(3-methoxyphenyl)-N'-(3-methylphenyl)urea (4), N-mesityl-N'-(4-methylphenyl)urea (6), N-(1,3-benzothiazol-2-yl)-N'-(3 ...
Mustafa Sana, Perveen Shahnaz, Khan Ajmal   +2 more
doaj   +1 more source

Application of isocyanate-based materials in asphalt pavement: A review

Journal of Road Engineering
Isocyanate and its products are playing an increasingly important role in the high-performance development of asphalt pavement, but researchers have always focused on polyurethane (PU), one of the isocyanate products, and neglected the other roles of ...
Xing Gong, Quantao Liu, Haiqin Xu, Huan Wang, Shaopeng Wu   +4 more
doaj   +1 more source

Sustained Release Drug Delivery Applications of Polyurethanes

Pharmaceutics, 2018
Since their introduction over 50 years ago, polyurethanes have been applied to nearly every industry. This review describes applications of polyurethanes to the development of modified release drug delivery.
Michael B. Lowinger, Stephanie E. Barrett, Feng Zhang, Robert O. Williams   +3 more
doaj   +1 more source

The Effects of Acetylated Poplar Particles on Applicational Properties of manufactured Particleboards with Isocyanate Resin [PDF]

تحقیقات علوم چوب و کاغذ ایران, 2009
The capability of acetylated poplar particles with isocyanate resinin manufacturing particleboard was investigated. The acetylation degrees at high, medium, and zero (control) levels and type of resin (isocyanate and urea formaldehyde) were considered as
Hamideh Abdolzadeh, Kazem Doost hosseini
doaj   +1 more source

Isocyanate toughened pCBT: Reactive blending and tensile properties

eXPRESS Polymer Letters, 2013
Cyclic butylene terephthalate oligomers (CBT) were reacted in a ring-opening polymerization with three types of isocyanates: a bifunctional aromatic type, a bifunctional aliphatic type and a polymeric aromatic isocyanate.
T. Abt, M. Sanchez-Soto, A. Martinez de Ilarduya, J. J. Bou   +3 more
doaj   +1 more source

Organics in comet 67P – a first comparative analysis of mass spectra from ROSINA–DFMS, COSAC and Ptolemy [PDF]

, 2017
The ESA Rosetta spacecraft followed comet 67P at a close distance for more than 2 yr. In addition, it deployed the lander Philae on to the surface of the comet.
A. Bieler, A. Morse, Balsiger, Biele, C.-Y. Tzou, Calmonte, Capaccioni, Cottin, F. Goesmann, Finzi, Fornasier, Fray, Goesmann, Goesmann, Graf, Grün, H. Balsiger, Huebner, Hässig, I. Wright, J. de Keyser, J.J. Berthelier, Kathrin Altwegg, Korth, Krüger, L. Le Roy, M. G. G. T Taylor, M. Rubin, M. Schuhmann, Meier, Mitchell, Morse, Morse, Nevejans, Quirico, Rubin, Rubin, S. Gasc, S.A. Fuselier, Stein, Stern, T. I. Gombosi, Thomas, U. Calmonte, Ulamec, Wright   +45 more
core   +4 more sources

Synthesis of 2-Azetidinones via Cycloaddition Approaches: An Update

Reactions
The present review is a comprehensive update of the synthesis of monocyclic β-lactams via cycloaddition reactions. According to the IUPAC definition of cycloaddition, both elementary and stepwise processes (formal cycloadditions) have been considered ...
Franca Maria Cordero, Donatella Giomi, Fabrizio Machetti   +2 more
doaj   +1 more source

Modeling of Isocyanate Synthesis by the Thermal Decomposition of Carbamates

Computation, 2020
The presented work is devoted to isocyanate synthesis by the thermal decomposition of carbamates model. The work describes the existing isocyanate-obtaining processes and the main problems in the study of isocyanate synthesis by the thermal decomposition
Ratmir Dashkin, Georgii Kolesnikov, Pavel Tsygankov, Igor Lebedev, Artem Lebedev, Natalia Menshutina, Khusrav Ghafurov, Abakar Bagomedov   +7 more
doaj   +1 more source

Bio-based light-healing isocyanate-free polyurethanes derived from carbonated soybean oil and coumarin

Green Chemistry Letters and Reviews, 2023
In response to environmental concerns and restrictions on isocyanate-based materials, researchers and the coatings industry are focused on developing eco-friendly isocyanate-free polyurethanes.
Karteek Boga, Nikhil Rambharosh Dhore, Aruna Palanisamy, Antonio F. Patti, John C. Warner, George P. Simon, Kei Saito   +6 more
doaj   +1 more source

UV Laser-Induced Photodecomposition of Matrix-Isolated Salicylhydroxamic Acid: Identification of New Isocyanate Complexes

Molecules
Photochemical reactions of salicylhydroxamic acid were induced using tunable UV laser radiation followed by FTIR spectroscopy. Four pairs of co-products were experimentally found to appear in the photolysis: C6H4(OH)NCO⋯H2O (1), C6H4(OH)C(O)N⋯H2O (2 ...
Magdalena Sałdyka, Zofia Mielke
doaj   +1 more source