Publications by authors named "Kai Zhen"

Leveraging the liquid-phase immiscibility effect and phase diagram calculations, a sequence of alloy powders with varying Fe content was designed and fabricated utilizing the gas atomization method. Microstructural characterizations, employing SEM, EDS, and XRD analyses, revealed the successful formation of an incomplete shell on the surfaces of Al-Bi-Fe powders, obviating the need for Sn doping. This study systematically investigated the microstructure, hydrolysis performance, and hydrolysis process of these alloys in deionized water.

View Article and Find Full Text PDF
Article Synopsis
  • A research study reviewed the impact of exercise on brain-derived neurotrophic factor (BDNF) levels in Alzheimer's disease models, highlighting conflicting results influenced by various factors like gender and age.
  • The analysis included 36 randomized controlled trials from 1196 initial studies, revealing a significant overall increase in BDNF levels due to exercise.
  • Specific types of exercise such as treadmill, swimming, and voluntary wheel running were particularly effective, with swimming showing the highest increase in BDNF levels within the hippocampus and cortex of Alzheimer's models.
View Article and Find Full Text PDF
Article Synopsis
  • The study investigated the impact of 6 weeks of drop jump training at different heights (40, 60, and 80 cm) on explosive strength and change of direction (CoD) abilities in collegiate Sanda athletes.
  • Results from repeated-measure ANOVA showed significant improvements post-training in various performance tests, particularly for the 60 cm drop jump group, which demonstrated the greatest gains.
  • The findings indicate that 6 weeks of drop jump training can enhance lower limb explosive power and CoD performance, with 60 cm being the most effective drop height for this purpose.
View Article and Find Full Text PDF

The remediation of soil contaminated with hydrophobic organic pollutants has attracted great public concern. In the present study, a novel catalyst using biochar supported ferro ferric oxide modified by carboxymethyl cellulose (CMC-FeO/BC) was developed to activate the Fenton reaction for hazardous hydrophobic organic pollutants, and the degradation mechanisms were analyzed in terms of free radicals, electron transfer pathways and degradation intermediates. The results showed that the CMC-FeO/BC-activated HO system degraded nearly 100% of pyrene in the aqueous system after a 1440-min reaction.

View Article and Find Full Text PDF

An amorphous porous iron material (FH) was firstly self-synthesized using a simple coprecipitation approach and then utilized to activate peroxymonosulfate (PMS) for the catalytic degradation of pyrene and remediation of PAHs contaminated soil on site. FH exhibited more excellent catalytic activity than traditional hydroxy ferric oxide and possessed stability at a pH range of 3.0-11.

View Article and Find Full Text PDF

Current research suggests that continuous aerobic exercise can be effective in improving vascular endothelial function, while the effect between different intensities and durations of exercise is unclear. The aim of this study was to explore the effect of different durations and intensities of aerobic exercise on vascular endothelial function in different populations. Searches were performed in PubMed, Web of Science, and EBSCO databases.

View Article and Find Full Text PDF

A growing body of research has examined the effect of aerobic exercise on cognitive function in people with Alzheimer's Disease (AD), but the findings of the available studies were conflicting. The aim of this study was to explore the effect of aerobic exercise on cognitive function in AD patients. Searches were performed in PubMed, Web of Science, and EBSCO databases from the inception of indexing until 12 November 2021.

View Article and Find Full Text PDF

The remediation for industrial site soil has attracted public concerns because of the hazardous and hydrophobic properties of organic pollutants existed in the soil. The persulfate oxidation activated by Fe chelated with sodium citrate (PS/Fe/SC) was used to remediate different types of industrial site soils in the present study. The maximum removal rates of Σ16 PAHs in the Nanjing site soil (NJS) and Hefei site soil (HFS) were 73.

View Article and Find Full Text PDF

Previous studies have shown that aerobic exercise is an effective way to improve symptoms of Parkinson's disease (PD). The aim of this study [PROSPERO CRD42022340730] was to explore the effects of aerobic exercises on balance, gait, motor function, and quality of life in PD patients. Searches were performed in PubMed, Web of Science, and EBSCO electronic databases.

View Article and Find Full Text PDF

Once the sludge was directly used in the farmland, it will have a negative impact on human health through the food chain because sludge contains pollutants. Sewage sludge pyrolysis into biochar is an effective way to realize sludge harmless and resourceful utilization. This research used hydrothermal carbonization method to convert sludge into sludge biochar (SLBC) to reduce the types and contents of pharmaceuticals and personal care products (PPCPs) and available heavy metals.

View Article and Find Full Text PDF

Allatostatins (ASTs) comprise a family of insect neuropeptides isolated from cockroaches and found to inhibit the production of juvenile hormone (JH) by the corpora allata (CA). For this reason, the ASTs can be regarded as possible IGR candidates for pest control. Six peptidomimetic analogs according to the C-terminal pentapeptide of ASTs were prepared by solid-phase organic synthetic methods in an attempt to obtain new simple substitution agents.

View Article and Find Full Text PDF