Two dimensional confinement induced discontinuous chain transitions for augmented electrocaloric cooling.

Overheating remains a major barrier to chip miniaturization, leading to device malfunction. Addressing the urgent need for thermal management promotes the development of solid-state electrocaloric cooling. However, enhancing passive heat dissipation through two-dimensional materials in electrocaloric polymers typically compromises the electrocaloric effect.

Solvent-driven luminescence modulation/switching in an iridium(iii) complex containing an aldehyde group.

Complex [Ir(dfppy)2(phca)]PF6 (1) has been synthesized, which contains an aldehyde group in the N^N ligand phca = 1,10-phenanthroline-4-carbaldehyde, with the aim of exploring solvent-driven luminescence modulation/switching in this complex. Complex 1 shows green emission at 514 nm in CH3OH, while orange phosphorescence with the emissions at 516 and 624 nm in CH2Cl2. The solid-state structure of 1 is dependent on the crystallization solvent used, forming a red solid 1R in CH2Cl2, while a yellow solid 1Y in CHCl3.

Quality of sperm obtained by penile vibratory stimulation and percutaneous vasal sperm aspiration in men with spinal cord injury.

The aim of this study was to explore sperm chromosomal aneuploidy and DNA integrity in infertile patients with spinal cord injury (SCI). Semen samples were collected from 12 infertile men with SCI by percutaneous vasal sperm aspiration (PVSA) and from 14 male SCI patients by penile vibratory stimulation (PVS). These semen samples as well as samples from 16 donors were analyzed using the hypo-osmotic swelling (HOS) test, the sperm chromatin dispersion test, terminal deoxynucleotidyl transferase-mediated terminal uridine nick-end labeling assay, and multicolor fluorescence in situ hybridization with probes specific for the chromosomes 13, 18, 21, X, and Y.