Multiscale modeling of CO2 capture in dicationic ionic liquids: Evaluating the influence of hydroxyl groups using DFT-IR, COSMO-RS, and MD simulation methods.

This work employs a combination of density functional theory-infrared (IR), conductor-like screening model for real solvents (COSMO-RS), and molecular dynamic (MD) methods to investigate the impact of hydroxyl functional groups on CO2 capture within dicationic ionic liquids (DILs). The COSMO-RS reveals that hydroxyl groups in DILs reduce the macroscopic solubility of CO2 but improve the selectivity of CO2 over CO, H2, and CH4 gases. Quantum methods in the gas phase and MD simulations in the liquid phase were conducted to delve deeper into the underlying mechanisms.

What Is the Effect of Maxillary Impaction Orthognathic Surgery on Voice Characteristics? A Quasi-Experimental Study.

Background: Regarding the impact of orthognathic surgery on the airway and voice, this study was carried out to investigate the effects of maxillary impaction surgery on patients' voices through acoustic analysis and articulation assessment.

Methods: This quasi-experimental, before-and-after, double-blind study aimed at examining the effects of maxillary impaction surgery on the voice of orthognathic surgery patients. Before the surgery, a speech therapist conducted acoustic analysis, which included fundament frequency (F0), Jitter, Shimmer, and the harmonic-to-noise ratio (HNR), as well as first, second, and third formants (F1, F2, and F3).

A Rare Case of Orthokeratinized Odontogenic Cyst (OOC) in the Posterior Mandible of a Young Adult 18-Year-Old Boy.

Orthokeratinized Odontogenic Cyst (OOC) is a rare odontogenic cyst, which is important because it has a low recurrence potential, but it has a percentage of the potential for malignant changes. OOC characteristics can be different from OKC (odontogenic keratocyst), which was once classified in its category. The microscopic view of OOC cyst is the reason for its easy identification from OKC, the orthokeratinized epithelial covering and the clear granular layer, and the hyperplasia of the basal layer, and the smooth surface of this cyst.

A viable method to replace the metal trocar drill guide in the inaccessibility of the long sagittal drill for mandibular fixation in BSSO.

The bilateral sagittal split osteotomy requires many specific instruments. Many of them are not used by any surgical team other than the maxillofacial surgery team. The absence of some of these materials makes it practically impossible to perform or continue the operation, with a negative impact on the outcome.

CO capture using dicationic ionic liquids (DILs): Molecular dynamics and DFT-IR studies on the role of cations.

Dicationic ionic liquids (DILs) have been shown to be useful as an effective solvent for the absorption of CO. However, compared to monocationic ionic liquids (MILs), they have been less investigated for this application. Previous studies on MIL-CO systems have shown that anions play the main role in tuning CO capture, but the partial negative charge on the oxygens of CO may interact with cation centers and, especially, for DILs with two charge centers, the role of cations can be significant.