Results 41 to 50 of about 1,849 (201)

Quantifying the cooperative evolution of microphase segregation and nanostructural order in annealed polyurethanes of MDI‐BDO‐PTHF

Journal of Polymer Science, Volume 62, Issue 13, Page 2988-3012, 1 July 2024.
Abstract Here, we quantify the relationship between microphase segregation and local structure development in thermoplastic polyurethanes. Samples were prepared with varying ratios of 4,4′‐methylene diphenyl diisocyanate (MDI) and 1,4‐butanediol (BDO) to polytetrahydrofuran (PTHF) and annealed at temperatures Ta between RT–140 °C for 20 h each ...
Maxwell W. Terban, Elmar Pöselt, Marc Malfois, Armin Schulz, Edgar Schander, A. M. Milinda Abeykoon, Bernd Hinrichsen, Robert E. Dinnebier   +7 more
wiley   +1 more source

Molecular structure and selective theophylline complexation by conformational change of diethyl N,N′‐(1,3‐phenylene)dicarbamate

Acta Crystallographica Section C, Volume 80, Issue 6, Page 190-199, June 2024.
The diethyl N,N′‐(1,3‐phenylene)dicarbamate–theophylline (1–TEO) complex was obtained by mechanochemistry involving the conformational change of one of the ethyl carbamate groups of 1 from the endo conformation to the exo conformation to allow the formation of intermolecular interactions.The receptor ability of diethyl N,N′‐(1,3‐phenylene)dicarbamate ...
Juan Saulo González-González, Alfonso Martínez-Santos, María José Emparán-Legaspi, Armando Pineda-Contreras, Francisco Javier Martínez-Martínez, Marcos Flores-Alamo, Hector García-Ortega   +6 more
wiley   +1 more source

Chiral Stationary Phases for Liquid Chromatography Based on Chitin- and Chitosan-Derived Marine Polysaccharides

, 2017
The development of chiral stationary phases (CSPs) for liquid chromatography (LC) revolutionized the enantioseparation and, nowadays, different types of CSPs are commercially available.
Maria Tiritan, João Ribeiro, Madalena Pinto, Carla Fernandes   +3 more
core   +1 more source

Thermodynamic and Catalytic Insights into Non‐Reductive Transformation of CO2 with Amines into Organic Urea Derivatives

ChemCatChem, Volume 16, Issue 6, March 22, 2024.
Thermodynamics and catalysis: Non‐reductive conversion of CO2 with amines to produce value‐added organic urea derivatives has been overviewed from the viewpoints of both thermodynamics and catalysis. The lessons described in this review could be helpful for the assessment of developed catalytic systems and further improvement of efficiency of CO2 ...
Mizuho Yabushita, Ryotaro Fujii, Yoshinao Nakagawa, Keiichi Tomishige   +3 more
wiley   +1 more source

Populations Collected on Vegetable Crops in Spain

, 2004
Forty-seven greenhouses of vegetable crops were surveyed in south-eastern Spain at the beginning of the epidemic (January 2000) to compare sensitivity of Botrytis cinerea populations to pyrimethanil (an anilinopyrimidine fungicide) after 4 years of ...
C. Moyano, P. Melgarejo, Gómez, Valeria, Melgarejo, Paloma, V. Gómez, Moyano, C.   +5 more
core   +1 more source

Preparation of the chemically bonded cellulose phenylcarbamates chiral stationary phases for the separation of enantiomers

, 2000
Phenylcarbamates of cellulose (CTPC) were chemically bonded to S-aminopropyl silica gel with 4,4'-diphenylmethane diisocyanate as a spacer through the carboxyl of the glucose unit of cellulose.
Zou, HF, Zhang, Q, Chen, XM, Ni, JY, Yang, L   +4 more
core  

Synthesis of Some Carhamates of Steroidal Lactams and Lactones as Possible Alkylating Agents

, 1976
16-0xo-l 7 a-aza-5o.-androstan-3-yl N-alkyl/phenylcarbamates (I-V), 16-oxo-l 7a-oxa-5a-androstan-3-yl N-ethylcarbamate (VI), 16-oxo-l 7a-aza-5-androsten-3-yl N-alkyl/phenylcarbamates (VII-:IX) and 4-oxo-3-aza-A-homo-4a-androsten-l 7B-yl N ...
Souli, E., Catsoulacos, P., P. Catsoulacos, E. Souli   +3 more
core  

HCV inhibiting macrocyclic phenylcarbamates

, 2008
Compounds of the formula I: including a stereoisomer thereof, or an N-oxide, a pharmaceutically acceptable addition salt, or a pharmaceutically acceptable addition solvate thereof; useful as HCV inhibitors; processes for preparing these compounds as well
Mcgowan, D.C., Antonov, D, Nilsson, K. M., Jönsson, C.E.D., Samuelsson,, B.B., Belfrage,, Anna Karin G. L., Rosenquist,, Å. A. K., Raboisson, P. J, Ayesa Alvarez, S   +8 more
core  

Characterization of benzimidazole-resistant strains of rhynchosporium-secalis

, 1994
Benzimidazole-resistant mutants of Rhynchosporium secalis were easily generated in the laboratory using UV mutagenesis. Three levels of resistance were identified (low, LR; moderate, MR; high, HR), but there was no negative cross-resistance with N ...
Hollomon, D. W., Sheila Kendall, Ishii, H., Steven P. Heaney, Kendall, S., Hideo Ishii, Derek W. Hollomon, Heaney, S. P.   +7 more
core   +1 more source

Experimental model of convulsive syndrome based on phenylcarbamate

Extreme Medicine
Introduction. Carbamates are widely used in the pharmaceutical industry, agriculture, and household chemicals. Being reversible cholinesterase inhibitors, carbamates can cause the development of generalized convulsive syndrome. Untimely treatment contributes to the emergence of persistent neurological disorders.
A. S. Melekhova, A. V. Belskaya, V. N. Zorina, M. G. Melnikova, L. G. Kubarskaya, O. N. Gaikova   +5 more
openaire   +1 more source