RESUMO
Carbon-based quantum dots (CBQDs), sulfur-doped carbon-based quantum dots (S-CBQDs), and nitrogen-doped carbon-based quantum dots (N-CBQDs) have strong potential for drug delivery platforms. They were conjugated with andrographolide, a well-known hydrophobic drug, to study the concomitant changes in hydrophilicity. The interactions between these nanomaterials and the drug were studied by characterizing the optical and structural properties of the nanoparticles before and after coupling with the drug. It was found that the interaction of the drug with these nanomaterials produced noticeable changes in their optical and structural properties. Moreover, the partition coefficient for the nanocomposites was determined by NMR. The results indicate that conjugating the drug with the nanoparticles significantly enhanced its affinity for the aqueous phase, from 2.632 to 0.1117, thereby opening the possibility of using this approach for developing an effective drug delivery platform for this hydrophobic drug.
RESUMO
Dysphagia is a common condition in clinical practice; however, an unusual type of dysphagia due to compression of the esophagus by an abnormal right subclavian artery may be discovered in a rare subset of patients. The prognosis and treatment will depend on the severity of the symptoms and the compromise of surrounding structures. We present the case of an 18-year-old female who presented with gradually progressive dysphagia. At first, it was treated as gastroesophageal reflux disease; nonetheless, the dysphagia became severe, and after a thorough evaluation, an aberrant right subclavian artery that compressed the esophagus was discovered along with a truncus bicaroticus. She was successfully treated with surgery without any complications. On follow-ups, she's doing well.
RESUMO
The reaction between [TBA]2[Zn(dmit)2] and 3-chloro-2,4-penta-nedione yielded single crystals of the title compound, (3E,3'E)-3,3'-[(2-sulfanylidene-1,3-dithiole-4,5-diyl)bis(sulfanediyl)]bis(4-hydroxypent-3-en-2-one), C13H14O4S5, after solvent evaporation. The title compound crystallizes in the triclinic space group P with two mol-ecules related by an inversion center present in the unit cell. The central thione ring moiety contains a carbon-carbon double bond covalently linked to two sulfoxide substituents located outside of the plane of the ring. The S-C-C-S torsion angles are -176.18â (8) and -0.54â (18)°. Intra-molecular hydrogen bonds occur within the two dione substituents (1.67-1.69â Å). Adjacent asymmetric units are linked by C-Hâ¯S (2.89-2.90â Å), Sâ¯S [3.569â (1)â Å] and Oâ¯H [2.56-2.66â Å between non-stacked thione rings] short contacts.