Exploring the effects of combining health qigong and dance on working memory in middle-aged and elderly women: A preliminary investigation.

OBJECTIVE: Cognitive decline represents a critical clinical and public health issue that adversely affects the quality of life for older patients and their families. This concern was exacerbated by the reduced engagement in outdoor activities among seniors during the COVID-19 pandemic, presenting substantial challenges to aging societies. The objective of this study was to investigate the impact of health qigong combined with Tibetan dance on working memory in middle-aged and elderly women, and to determine its potential as a preventive strategy against cognitive disorders. METHODS: A pilot study was conducted to compare the effects of a Health Qigong exercise intervention with those of everyday life and sports routines. The primary outcome measure was working memory assessed using a 2-Back working memory task research paradigm. Between July and September 2021, a total of 33 women were divided into four groups: two middle-aged groups (N = 18, with 8 women in the experimental group and 10 in the control group) and two elderly groups (N = 15, with 7 in the experimental group and 8 in the control group). Participants in the experimental groups underwent a 10-week intervention, consisting of three 60-min sessions per week. Each session included a warm-up, Health Qigong combined with Tibetan dance, and a cool-down. Throughout the study, all participants continued their daily routines. Response times and error rates were analyzed using a mixed-design repeated-measures analysis of variance. RESULTS: A simple effects analysis revealed that Health Qigong combined with Tibetan dance significantly enhanced 2-Back response time and error rate in the middle-aged group. In contrast, the 2-Back error rate significantly increased in the elderly control group that did not receive the intervention (p < 0.05). CONCLUSION: Health Qigong demonstrates beneficial effects on middle-aged and elderly women. Combining Health Qigong with dance may serve as a preventive measure against cognitive disorders. This pioneering study conducted during the COVID-19 pandemic, assesses the new possibility of Health Qigong and dance, with the objective to offer more diverse indoor exercise options for middle-aged and elderly women.

Impact of high temperature on microstructural changes and oil absorption of tigernut (Cyperus esculentus L.) starch: Investigations in the starch-oil model system.

This study was to explore the internal reasons for the changes in oil absorption performance of tigernut starch (TS) by revealing the high-temperature induced variations of structural and functional properties of TS. The results showed that as the temperature increased from 80 °C to 140 °C, the degree of starch gelatinization increased, while the proportion of double helix structures, the total proportion of B1 and B2 chains, the relative crystallinity and the molecular weight decreased, accompanied by the fragmentation and swelling of TS granules. The oxidation of tigernut oil (TNO) led to a decrease in oil density and an increase in total polar component content. These phenomena could result in an increase of oil absorption capacity of TS and starch-lipid complex index. With further increase in temperature from 170 °C to 200 °C, the disruption of the crystalline structure and chain structure increased, resulting in the melting and disintegration of TS granules. This caused a decrease in the starch-oil contact area and capillary absorption of TNO by the TS granules. The results will contribute to revealing the effect of high-temperature induced changes in the structural and functional properties of TS on its oil absorption properties.

The current status of stimuli-responsive nanotechnologies on orthopedic titanium implant surfaces.

With the continuous innovation and breakthrough of nanomedical technology, stimuli-responsive nanotechnology has been gradually applied to the surface modification of titanium implants to achieve brilliant antibacterial activity and promoted osteogenesis. Regarding to the different physiological and pathological microenvironment around implants before and after surgery, these surface nanomodifications are designed to respond to different stimuli and environmental changes in a timely, efficient, and specific way/manner. Here, we focus on the materials related to stimuli-responsive nanotechnology on titanium implant surface modification, including metals and their compounds, polymer materials and other materials. In addition, the mechanism of different response types is introduced according to different activation stimuli, including magnetic, electrical, photic, radio frequency and ultrasonic stimuli, pH and enzymatic stimuli (the internal stimuli). Meanwhile, the associated functions, potential applications and developing prospect were discussion.