Exploring the relationship between older adults' online health information seeking, negative emotions and prevention behaviors in the pandemic context: a two-wave longitudinal study.

Introduction: During the COVID-19 pandemic, older adults were facing more mental health issues that may cause complex impacts on pandemic prevention, and turning to the internet for health information is a double-edged sword for them. This study aimed to investigate the reciprocal relationship between negative emotions and prevention behaviors in older adults, as well as the direct and moderating effects of online health information seeking (OHIS) on negative emotions and prevention behaviors. Methods: Based on the common-sense model of self-regulation (CSM) and a sample of more than 20,000 participants from the Survey of Health, Aging and Retirement in Europe (SHARE), this study first used an autoregressive cross-lagged panel model (CLPM) to analyze the longitudinal effect of negative emotions on prevention behaviors. Second, the study used ordinary least squares (OLS) regression to explore the influence of OHIS usage frequency changes on negative emotions and prevention behaviors. Third, the study used multigroup analysis to examine the moderating effect of OHIS usage frequency changes on the CLPM. Results: The findings indicate a significant longitudinal association where initial negative emotions predicted later prevention behaviors (ß = 0.038, p < 0.001), and increased OHIS frequency was linked to positive changes in prevention behavior (ß = 0.109, p < 0.001). Multigroup analysis revealed that the connection between negative emotions or increased negative emotions and prevention behaviors remained significant for those with no change or an increase in OHIS frequency but not for those with a decrease. Conclusion: This study suggested that negative emotions may drive older adults to engage more in prevention behaviors and that OHIS can augment this effect. These results underscore the importance of addressing mental health and providing reliable online health information to support older adults in managing infectious disease risks.

Internationalization of medical education in China: An investigation of medical graduates' global competence and its influencing factors.

AIM: Global competence has become an important competence for medical graduates in the globalized world. However, research on it is scarce. This study was built upon the scholarship published in the field to measure medical graduates' global competence. MATERIALS AND METHODS: A questionnaire was administered to China's medical graduates sampled from four institutions of medical education. Descriptive statistics were made to analyze the level of medical graduates GC. Influencing factors were investigated using multiple linear regression. Multiple levels of regression analysis were used to identify the influence of different independent variables on the dependent variable. RESULTS: The sample had a relatively good level of global competence in general, but lacked skills in cross-cultural communication and international academic communication. "Internationalization Concept and System" and "International Development of Teachers" in the school dimension and "Taking International Courses", "International Publication" and "Participation in International Conference" in the dimension of individual international involvement had a significant positive impact on the cultivation of global competence. CONCLUSIONS: The universities should aim for the construction of an effective institutional mechanism for internationalization to help improve students' global competence.

[Comparison of the Microbial Community Structure in Nitrifying Processes Operating with Different Dissolved Oxygen Concentrations].

High-throughput sequencing was applied to analyze the microbial community structure of nitrifying reactors operated with different dissolved oxygen (DO) levels. Results showed that the nitrifying reactor (RL) run with low DO (0.2-0.3 mg·L-1) exhibited greater microbial richness and diversity than the reactor run under the high DO condition[RH, DO=(2.0±0.1) mg·L-1]. In contrast, the microbial community in RH was more highly functionally organized than that in RL. Although the communities in RH and RL shared over 85% of the total sampled genetic information, the relative abundance of some individual species varied between the different DO conditions. Members of the Proteobacteria phylum, which accounted for 80.7% of the total microbes in RH, were highly enriched, and the relative abundance of Nitrosomonas reached to 65.1%. However, the microbial community in RL was dominated by Proteobacteria (43.8%), Firmicutes (20.0%), and Bacteroidetes (15.1%). In addition, a large fraction of bacteria possessing hydrolyzation and fermentation functions under anaerobic or anoxic conditions were also present in RL including Lactococcus, Anaerolineaceae, and Rhodocyclaceae. As known ammonium-oxidizing bacteria, Nitrosomonas oligotropha and Nitrosomonas europaea were enriched in the RH and RL, respectively, while Nitrospira defluvii, being a nitrite-oxidizing bacteria, dominated both reactors. Rather than DO, ammonia and nitrite availability should be key factors in the selective enrichment of these nitrifiers.

Control of the two-photon fluorescence of quantum dots coupled to silver nanowires.

Plasmon-based fluorescence modulation has led to important advances in various fields and has paved the way toward promising scientific research aimed at enabling new applications. However, the modulation of fluorescence properties based on both localized surface plasmon (LSP) and cavity modes of propagating surface plasmon polaritons (SPPs) are rarely reported. Here, we raster scanned a hybrid nanowire (HNW) with quantum dots (QDs) adsorbed onto a Ag nanowire (NW) and obtained two-photon fluorescence (TPF) maps of the intensity and decay rate. The spatial distributions of the intensity and decay rate strongly depend on the Fabry-Pérot (FP) cavity modes of the SPPs, the LSP mode launched by the incident laser and the excitation energy of the QDs. A double exponential decay process was observed, which is attributed to different decay channels through the LSP and cavity modes. The experimental results are explained using numerical simulations. This work shows that many physical parameters, such as the polarization of the incident beam and the geometry of the Ag NW, can modulate the fluorescence properties of the QDs, which has potential applications in many important fields.

Tunable triple Fano resonances based on multimode interference in coupled plasmonic resonator system.

In this paper, an asymmetric plasmonic structure composed of two MIM (metal-insulator-metal) waveguides and two rectangular cavities is reported, which can support triple Fano resonances originating from three different mechanisms. And the multimode interference coupled mode theory (MICMT) including coupling phases is proposed based on single mode coupled mode theory (CMT), which is used for describing and explaining the multiple Fano resonance phenomenon in coupled plasmonic resonator systems. Just because the triple Fano resonances originate from three different mechanisms, each Fano resonance can be tuned independently or semi-independently by changing the parameters of the two rectangular cavities. Such, a narrow 'M' type of double Lorentzian-like line-shape transmission windows with the position and the full width at half maximum (FWHM) can be tuned freely is constructed by changing the parameters of the two cavities appropriately, which can find widely applications in sensors, nonlinear and slow-light devices.