A dicyanamide-bridged 1D chain complex has been characterized structurally and magnetically. The Cu(II) ion exhibits a distorted trigonal bipyramidal (tbp) geommetry with the axial positions ocuppied by the benzimidazole nitrogen atom and the unidentate dca nitrogen atom. The ferromagnetic nature of the complex has been assigned to be due to the π–π contacts rather than the μ-1,5 dca bridges.
The purposes of this study were to establish and to explore the biological basis of the chronic stress‐induced premature ovarian failure (POF) model and to explore the therapeutic effects of the traditional Chinese medicine Muniziqi. Sexually matured female Sprague–Dawley rats were fed with spinach and cilantro in cold and wet conditions for about 20 weeks until a chronic stress (CS) model was established. The CS rats were divided into a POF stress model group and a stress model group according to weekly biological characteristics and hormone level detection ( luteinizing hormone [LH], follicle stimulating hormone [FSH], and estrogen [E2]). To investigate the therapeutic effect of Muniziqi, the POF disease stress model group was divided into the high‐, medium‐, and low‐drug intervention groups. The results showed that chronic stresses (special food, cold, damp) can lead to POF disease. The traditional Chinese medicine Muniziqi could not only improve the reproductive hormone level disorder, but also improve the function of the hypothalamus–pituitary–ovarian axis. The underlying mechanism may be a change in the E2, LH, and FSH hormone levels in serum and lower expression of ovarian premature aging‐related protein PFN‐1.
A superhydrophobic zirconium film with a hierarchical knobbly structure was prepared by a one-step electrochemical method on the surface of steel. Wettability was determined with a water contact angle of 157°and a sliding angle of 3°. The morphology was characterized with scanning electron microscopy, and the microstructure seemed like it is composed of micro-nano complicated particles. Furthermore, according to the results of Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and energy-dispersive X-ray spectrometry, the chemical composition of the film was zirconium palmitate. Moreover, the chemical and mechanical stabilities of the asprepared superhydrophobic zirconium palmitate surface were characterized by means of electrochemical measurements and abrasion test, respectively. The superhydrophobic surface could yield a stable air-liquid interface by performing as a barrier, from which the diffusion of corrosive media was prevented. On the other hand, the asprepared surface exhibited a good self-cleaning effect, by which the accumulation of contaminants on the surface was not favorable.
NotationE corr corrosion potential I corr corrosion current density R ct charge transfer resistance S-Zr steel-zirconium palmitate
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