RESULTS: A non-invasive measuring technique using an optical fluorescence method was developed for shake flasks containing a fluorescent solution with a waterlike viscosity at varying filling volume (VL = 15 to 40 mL) and shaking frequency (n = 150 to 450 rpm) at a constant shaking diameter (do = 25 mm). The method detected the leading edge (LB) and tail of the rotating bulk liquid (TB) relative to the direction of the centrifugal acceleration at varying circumferential heights from the base of the shake flask. The determined LB and TB points were translated into three-dimensional (3D) circumferential liquid distribution plots. The maximum liquid height (Hmax) of the bulk liquid increased with increasing filling volume and shaking frequency of the shaking flask, as expected. The toroidal shapes of LB and TB are clearly asymmetrical and the measured TB differed by the elongation of the liquid particularly towards the torus part of the shake flask.
CONCLUSION: The 3D liquid distribution data collected at varying filling volume and shaking frequency, comprising of LB and TB values relative to the direction of the centrifugal acceleration are essential for validating future numerical solutions using CFD to predict vital engineering parameters in shake flask.
METHODS: Frailty and fall publications were retrieved from Scopus and Web of Science databases without date restrictions. Data was analyzed using ScientoPy, and VOSviewer to generate statistics, visualizations, and maps based on temporality, productive countries, institutions, citations, subject categories, and keyword occurrences.
RESULTS: After pre-processing, 345 publications remained (84.6% Web of Science, 15.4% Scopus). The literature has grown steadily since 1990, led by the United States, China, and Japan. Prolific institutions were identified, including Pittsburgh University. Highly cited impactful studies were published across journals like the Journal of the American Geriatrics Society. Geriatrics/gerontology was the dominant subject category. Keyword co-occurrence analysis revealed clusters focusing on geriatric physical health, cardiovascular health, cognition, interventions, and mortality.
CONCLUSIONS: This bibliometric analysis synthesizes a comprehensive overview of frailty and fall research, identifying rising publication and citation trends, leading global contributors, impactful studies, and thematic focuses. The findings can inform resource allocation, international collaboration, impactful evidence utilization, and future research planning to advance frailty science and clinical care for older populations. Ongoing investigation is warranted into frailty mechanisms, assessment, management, and multidomain interventions.
METHODS: Scoping review methodology guided the synthesis of 272 publications on factors influencing physical activity. Bibliometric analysis examined publication trends, productivity, influential studies, content themes, and collaboration networks.
RESULTS: Since 2010, the United States has led a significant increase in research output. Highly cited articles identified physiological limitations and psychosocial determinants as key barriers and facilitators. Extensive focus was seen in clinical medicine and exercise science journals. Analysis revealed predominant attention to psychosocial factors, physiological responses, and applications in respiratory disease. Gaps remain regarding policy and environmental factors.
CONCLUSION: This review showed major advances in elucidating determinants while revealing the remaining needs to curb the pandemic of inactivity globally. Expanding international collaboration, contemporary theoretical models, and tailored mixed-methods approaches could promote progress through greater global participation. Addressing knowledge gaps across populations and disciplines should be a priority.
METHODS: This study compared assays currently used for detecting DENV infection at the Florida Department of Health including anti-DENV IgM and IgG ELISAs as well as qRT-PCR, against a commercially available DENV NS1 ELISA. These comparisons were made among a group of 21 human sera.
RESULTS: Nine of 14 (64.3%) DENV qRT-PCR+ samples were also DENV NS1+. Interestingly, the 5 NS1- samples that were qRT-PCR+ were additionally IgM- and IgG+ suggesting a nonprimary infection. Compared to qRT-PCR, the NS1 assay had a sensitivity of 64.3%, specificity 100%, PPV of 100%, and NPV of 58.3%.
CONCLUSIONS: The NS1 ELISA performed as expected in known DENV qRT-PCR+ samples; however negative NS1 results for qRT-PCR+ and IgG+ sera seemingly reduced the usefulness of the NS1 ELISA for nonprimary cases. We therefore conclude that diagnosis obtained via DENV NS1 ELISA deserves further investigation.