4,4′-Bipyridinium bis­(oxalato-κ2 O 1,O 2)cuprate(II): an ion-pair complex

The title compound, (C10H10N2)[Cu(C2O4)2] or (4,4′-H2bpy)[Cu(ox)2] (bpy is 4,4′-bipyridine and ox is oxalate), is an ion-pair complex comprising a protonated 4,4′-bipyridinium dication and a square-planar dioxalatocopper(II) dianion. In the centrosymmetric dianion, the CuII centre is coordinated by four O atoms from the two dicrete oxalate ligands [Cu—O = 1.9245 (19) and 1.9252 (17) Å], while the planar dications are also centrosymmetric. Inter-species N—H⋯O hydrogen bonds link the cations and anions into one-dimensional chains and, together with weak intra-ion C—H⋯O inter­actions, give a two-dimensional sheet structure

Bis(2-amino­thia­zole-4-acetato)aquazinc(II)

In the title compound, [Zn(C5H5N2O2S)2(H2O)], the central Zn atom (2 site symmetry) is five-coordinated by two N and three O atoms [Zn—N = 2.047 (3) Å, Zn—O = 2.099 (2) and 1.974 (4) Å] in a distorted square-pyramidal geometry. Besides one O atom from a water mol­ecule, two 2-amino­thia­zole-4-acetate ligands provide two N and two O atoms as coordinated atoms. In the crystal structure, inter­molecular O—H⋯O and N—H⋯O hydrogen bonds connect the mol­ecules into an infinite three-dimensional framework

Bis(2-amino-4-methyl-1,3-thia­zole-κN 3)dichloridocadmium(II)

In the title compound, [CdCl2(C4H6N2S)2], the CdII atom is coordinated by two chlorido ligands and two N atoms of the 2-amino-5-methyl-1,3-thia­zole (amtz) ligands in a slightly distorted tetra­hedral coordination geometry. Intra- and inter­molecular N—H⋯Cl hydrogen bonding stabilizes the crystal structure. A weak S⋯Cl inter­action [3.533 (2) Å] is observed between neighboring mol­ecules

Bis(ethyl 2-amino-4-thia­zoleacetato-κN)silver(I) nitrate

In the title complex, [Ag(C7H10N2O2S)2]NO3, the AgI cation is bicoordinated in an almost linear configuration by two N-donor atoms of the thia­zole rings of two distinct ethyl 2-amino-4-thia­zoleacetate (EATA) ligands. The dihedral angle between the two thia­zole rings is 49.9°. A weak Ag⋯O (2.729 Å) inter­action between the Ag cation and one of the O atoms from the nitrate anion is observed, and a pseudo-dimer is formed through a weak Ag⋯S (3.490 Å) inter­action between the Ag cation and the S atom of the thia­zole ring of a symmetry-related mol­ecule. In the crystal structure, there are intra- and inter­molecular N—H⋯O hydrogen bonds. The occurrence of inter­molecular N—H⋯O hydrogen bonds results in the formation of two-dimensional sheets parallel to (010), which are further linked into a three-dimensional network through weak C—H⋯O inter­actions

The influence of acoustic field induced by HRT on oscillation behavior of a single droplet

This paper presents an experimental and theoretical study on the effects of an acoustic field induced by Hartmann Resonance Tube (HRT) on droplet deformation behavior. The characteristics of the acoustic field generated by HRT are investigated. Results show that the acoustic frequency decreases with the increase of the resonator length, the sound pressure level (SPL) increases with the increase of nozzle pressure ratio (NPR), and it is also noted that increasing resonator length can cause SPL to decrease, which has rarely been reported in published literature. Further theoretical analysis reveals that the resonance frequency of a droplet has several modes, and when the acoustic frequency equals the droplet's frequency, heightened droplet responses are observed with the maximum amplitude of the shape oscillation. The experimental results for different resonator cavity lengths, nozzle pressure ratios and droplet diameters confirm the non-linear nature of this problem, and this conclusion is in good agreement with theoretical analysis. Measurements by high speed camera have shown that the introduction of an acoustic field can greatly enhance droplet oscillation, which means with the use of an ultrasonic atomizer based on HRT, the quality of atomization and combustion can be highly improved

ScRNA-seq and spatial transcriptomics: exploring the occurrence and treatment of coronary-related diseases starting from development

Single-cell RNA sequencing (scRNA-seq) is a new technology that can be used to explore molecular changes in complex cell clusters at the single-cell level. Single-cell spatial transcriptomic technology complements the cell-space location information lost during single-cell sequencing. Coronary artery disease is an important cardiovascular disease with high mortality rates. Many studies have explored the physiological development and pathological changes in coronary arteries from the perspective of single cells using single-cell spatial transcriptomic technology. This article reviews the molecular mechanisms underlying coronary artery development and diseases as revealed by scRNA-seq combined with spatial transcriptomic technology. Based on these mechanisms, we discuss the possible new treatments for coronary diseases