Results 21 to 30 of about 10,266 (213)

Characterization of the Sublimation and Vapor Pressure of 2-(2-Nitrovinyl) Furan (G-0) Using Thermogravimetric Analysis: Effects of Complexation with Cyclodextrins

Molecules, 2015
In the present work, the sublimation of crystalline solid 2-(2-nitrovinyl) furan (G-0) in the temperature range of 35 to 60 °C (below the melting point of the drug) was studied using thermogravimetric analysis (TGA).
Vivian Ruz, Mirtha Mayra González, Danny Winant, Zenaida Rodríguez, Guy Van den Mooter   +4 more
doaj   +1 more source

What mechanisms dominate the activity of Geminid Parent (3200) Phaethon? [PDF]

, 2018
A long-term sublimation model to explain how Phaethon could provide the Geminid stream is proposed. We find that it would take $\sim6$ Myr or more for Phaethon to lose all of its internal ice (if ever there was) in its present orbit.
Ip, Wing-Huen, Spohn, Tilman, Yu, LiangLiang   +2 more
core   +2 more sources

Thermochemistry of Solution, Solvation, and Hydrogen Bonding of Cyclic Amides in Proton Acceptor and Donor Solvents. Amide Cycle Size Effect

Molecules, 2021
In the present work, the thermochemistry of solution, solvation, and hydrogen bonding of cyclic amides in proton acceptor (B) and proton donor (RXH) solvents were studied. The infinite dilution solution enthalpies of δ-valerolactam, N-methylvalerolactam,
Ilnaz T. Rakipov, Artem A. Petrov, Aydar A. Akhmadiyarov, Artashes A. Khachatrian, Timur A. Mukhametzyanov, Boris N. Solomonov   +5 more
doaj   +1 more source

Electrodynamic Response and Stability of Molecular Crystals [PDF]

, 2012
We show that electrodynamic dipolar interactions, responsible for long-range fluctuations in matter, play a significant role in the stability of molecular crystals.
Liang, Jian-Jie, Marom, Noa, Reilly, Anthony M., Schatschneider, Bohdan, Tkatchenko, Alexandre, Zhang, Guo-Xu   +5 more
core   +2 more sources

Estimativa por DSC das entalpias de sublimação da etilenouréia e da propilenouréia: algumas correlações empíricas envolvendo amidas e tioamidas Estimative by DSC data of the sublimation enthalpies for ethyleneurea and propyleneurea: some empirical correlations with amides and tioamides

Química Nova, 1999
By using DSC data, the enthaplies of sublimation for ethyleneurea and propyleneurea, are calculated as 84 and 89 kJ mol-1 respectively. Using the vaporization enthalpy values for dimethylethyleneurea and dimethylprophyleneurea, as obtained from ...
Robson Fernandes de Farias
doaj   +1 more source

DETERMINATION OF SATURATION VAPOR PRESSURE OF LOW VOLATILE SUBSTANCES THROUGH THE STUDY OF EVAPORATION RATE BY THERMOGRAVIMETRIC ANALYSIS [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2015
Subject of Study.Research of vapor pressure of low volatile substances is a complicated problem due to both direct experimental implementation complexity and, most significantly, the issues faced correctness of the analysis and processing of experimental
R. V. Ralys, G. S. Yablonsky, A. A. Slobodov   +2 more
doaj   +1 more source

Circularly Polarized Luminescent and Melt‐Processable Copper(I)‐Organic Glasses Based on 2,2′‐Bis(diphenylphosphino)‐1,1′‐binaphthyl

Angewandte Chemie, EarlyView.
Homochiral Cu(I) cyanide complexes based on 2,2’‐bis(diphenylphosphino)‐1,1’‐binaphthyl (BINAP) form melt‐quenched and desolvation‐derived metal–organic glasses that exhibit circularly polarized thermally activated delayed fluorescence (TADF) at room temperature, enabling processable chiroptical materials.
Zeyu Fan, Indranil Sen, Roman Pallach, Guo‐Qiang Li, Andreas Steffen, Sebastian Henke   +5 more
wiley   +2 more sources

A Combined Experimental and Theoretical Study of Nitrofuran Antibiotics: Crystal Structures, DFT Computations, Sublimation and Solution Thermodynamics

Molecules, 2021
Single crystal of furazolidone (FZL) has been successfully obtained, and its crystal structure has been determined. Common and distinctive features of furazolidone and nitrofurantoin (NFT) crystal packing have been discussed.
Alex N. Manin, Ksenia V. Drozd, Alexander P. Voronin, Andrei V. Churakov, German L. Perlovich   +4 more
doaj   +1 more source

Molecular Structure, Thermodynamic and Spectral Characteristics of Metal-Free and Nickel Complex of Tetrakis(1,2,5-thiadiazolo)porphyrazine

Molecules, 2021
The Knudsen effusion method with mass spectrometric control of the vapor composition was used to study the possibility of a congruent transition to the gas phase and to estimate the enthalpy of sublimation of metal-free tetrakis(1,2,5-thiadiazolo ...
Yuriy A. Zhabanov, Alexey V. Eroshin, Igor V. Ryzhov, Ilya A. Kuzmin, Daniil N. Finogenov, Pavel A. Stuzhin   +5 more
doaj   +1 more source

Extremal hyper-Zagreb index of trees of given segments with applications to regression modeling in QSPR studies

Alexandria Engineering Journal, 2023
Introduced by Gutman & Trinajstić in 1972, the two well-known Zagreb indices efficiently determine the total π-electron energy of alternant hydrocarbons. The hyper-Zagreb index is a variant of the classical first Zagreb index.
Sakander Hayat, Muhammad Adil Khan, Asad Khan, Haziq Jamil, Muhammad Yasir Hayat Malik   +4 more
doaj   +1 more source