Publications by authors named "Caixia Qi"

V-doped ZrO support materials were synthesized through a hydrothermal method, followed by a deposition-precipitation process to load Au clusters using an HAuClO precursor. This study investigated the impact of vanadium doping on propylene epoxidation over the corresponding Au-supported catalysts. Vanadium incorporation significantly enhanced propylene conversion and promoted acrolein production, leading to reduced propylene oxide selectivity.

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A corrosion and wear resistant coating was developed on the surface of titanium alloy using micro-arc oxidation (MAO) technology with addition of lignin sulfonate (SLS) as an additive in electrolytes containing 15 g/L of NaSiO·9HO and 10 g/L of NaPO·12HO. The effects of concentration of SLS on the surface morphology, microstructure, and corrosion-wear performance of the MAO coatings were systematically investigated. Wetting properties and mechanical characteristics of MAO coatings were determined by contact angle measurements, microhardness testing, and bonding strength assessments.

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Near-infrared (NIR) surface-enhanced resonance Raman (SERRS) nanoprobes have found wide applications in biomedicine; however, almost all of these nanoprobes are fluorescent because the resonant Raman dyes used cannot be fully quenched onto the underlying plasmonic nanoparticles. Therefore, suppressing the fluorescence backgrounds in resonant Raman spectroscopy imaging is extremely important. In this work, we use a black hole quencher, IQ1, as a Raman dye to develop absolutely nonfluorescent NIR resonant SERRS NPs.

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Article Synopsis
  • An organometallic iridium (Ir) complex-functionalized nanographene catalyst was created using a two-step process that included amide ligand modification and coordination with iridium.
  • * The catalyst demonstrated exceptional hydrogenation ability, excellent recyclability, and selectivity for carbonyl derivatives like ketones and aldehydes at a low temperature of 40 °C.
  • * This Ir-complex-based catalyst is cost-effective, which enhances its potential for use in industrial applications.*
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In view of the low signal-to-noise ratio (SNR) of shear wave electromagnetic acoustic transducers (EMAT) in the detection of high-temperature equipment, the use of low excitation voltage (LEV) further deteriorates the detection results, resulting in the echo signal containing defects being drowned in noise. For the extraction of the EMAT signal, an adaptive noise reduction method is proposed. Firstly, the minimum envelope entropy is taken as the fitness function for the Harris Hawks Optimizer (HHO), and the optimal successive variational mode decomposition (SVMD) balance parameter is searched by HHO adaptive iteration to decompose LEV EMAT signals at high temperatures.

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This study evaluated the effect of solvent acids on the structure and corrosion resistance performance of chitosan (CS) film on MAO-treated AZ31B magnesium (Mg) alloy. Initially, CS solutions were prepared in four solvent acids: acetic acid (HAc), lactic acid (LA), hydrochloric acid (HCl), and citric acid (CA). The CS films were subsequently deposited on MAO-treated AZ31B Mg alloy via a dip-coating technique.

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Objective: The objective is to evaluate the 5-year follow-up results of percutaneous intramyocardial septal radiofrequency ablation (PIMSRA) for hypertrophic obstructive cardiomyopathy (HOCM), including clinical status, electrocardiographic and echocardiographic characteristics.

Methods: 27 patients (age: 44.3±15.

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As a global malignancy with high mortality rate, targeted drug development for Uterine Cervical Neoplasms is an important direction. The traditional formula Guizhi Fuling Wan (GFW) is widely used in gynecological diseases. However, its potential mechanism of action remains to be discovered.

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Our research demonstrated that novel pentamethylcyclopentadienyl (Cp*) iridium pyridine sulfonamide complex PySONPh-Ir () could highly specifically catalyze nicotinamide adenine dinucleotide (NAD) into the corresponding reducing cofactor NADH in cell growth media containing various biomolecules. The structures and catalytic mechanism of were studied by single-crystal X-ray, NMR, electrochemical, and kinetic methods, and the formation of iridium hydride species Ir-H was confirmed to be the plausible hydride-transfer intermediate of . Moreover, benefiting from its high hydrogen-transfer activity and selectivity for NADH regeneration, was used as an optimal metal catalyst to establish a chem-enzyme cascade catalytic hydrogen-transfer system, which realized the high-efficiency preparation of l-glutamic acid by combining with l-glutamate dehydrogenase (GLDH).

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Objective: Epidural analgesia has been widely used as a form of pain relief during labor and its safety has been gradually recognized. However, few studies of the effect of epidural analgesia on the pelvic floor are known. Thus, we aim to analyze the effect of epidural analgesia on labor progress and women's pelvic floor muscle from the perspective of electromyography systematically.

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Rolipram is a selective phosphodiesterase-4 (PDE4) inhibitor. The effect of rolipram on the metastasis of choriocarcinoma is barely known. Here, we evaluated the role of rolipram in the migration and invasion of human choriocarcinoma cells in vitro.

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Article Synopsis
  • Systemic lupus erythematosus (SLE) is more likely to develop during early pregnancy, but cases can arise later, such as in late pregnancy or postpartum, which is less studied.
  • A 25-year-old pregnant woman with a history of lymphoma experienced low platelet counts and skin rashes, initially misdiagnosed as a recurrence of her lymphoma, but was later confirmed to have new-onset SLE.
  • After a cesarean section at 34 weeks gestation, both the mother and baby recovered well, highlighting the need to consider SLE in pregnant women with a history of cancer to avoid misdiagnosis.
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Modulating the active sites for controllable tuning of the catalytic activity has been the goal of much research, however, this remains challenging. The O vacancy is well known as an active site in reducible oxides. To modify the activity of O vacancies in praseodymia, we synthesized a series of praseodymia-titania mixed oxides.

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A series of nanoparticles (NPs) with different Au content was successfully encapsulated into metal organic framework ZIF-8 with highly porous structure through room-temperature crystallization. X-ray diffraction, Fourier transform infrared spectroscopy, N adsorption and transmission electron microscopy were carried out to characterize the obtained Au@ZIF-8 heterogeneous catalytic material comprehensively. Au NPs were dispersed uniformly in the ZIF-8 and the Au NP diameter was 5-6 nm.

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Animal models of Parkinson's disease (PD), a chronic and progressive neurodegenerative disease of the central nervous system (CNS), play a key role in investigating the pathogenesis and developing new therapeutic strategies of PD. However, this goal has been limited by certain weaknesses in the available animal models of PD, e.g.

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Background: Spatial frequency domain (SFD) measurement allows rapid and non-contact wide-field imaging of the tissue optical properties, thus has become a potential tool for assessing physiological parameters and therapeutic responses during photodynamic therapy of skin diseases. The conventional SFD measurement requires a reference measurement within the same experimental scenario as that for a test one to calibrate mismatch between the real measurements and the model predictions. Due to the individual physical and geometrical differences among different tissues, organs and patients, an ideal reference measurement might be unavailable in clinical trials.

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Ovarian cancer (OC) is the most frequent cause of mortality among gynecological malignancies, with a 5-year survival rate of approximately 30%. The standard regimen for OC therapy includes a platinum agent combined with a taxane, to which the patients frequently acquire resistance. Resistance arises from the oxidation of anticancer drugs by CYP1B1, a cytochrome P450 enzyme overexpressed in malignant OC.

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Objective: To investigate the effect of ghrelin on duodenal migrating myoelectric complex (MMC) in rats with chronic renal failure (CRF).

Methods: Thirty healthy male SD rats were randomly assigned into sham-operated group (n=6) and CRF group (n=24), and the latter group was divided into 4 subgroups according to ghrelin doses administered with or without pretreatment with the receptor antagonist D-Lys(3)-GHRP-6. After a 18-h fasting, the rats with or without pretreatment with D-Lys(3)-GHRP-6 were given subcutaneous injections of ghrelin at different doses to observe the changes in duodenal MMC recorded using a multi lead physiological recording system.

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Objective: To evaluate the roles of endometrial matrix metalloproteinase (MMP)-2 and -9, vascular endothelial growth factors (VEGF), and microvascular density (MVD) in the occurrence of anovulatory dysfunctional uterine bleeding (DUB).

Design: A prospective analytical design.

Setting: The obstetrics and gynecology department of an academic training hospital.

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