RESUMEN
The accessibility of contaminants detection methods is urgently required for environmental and food safety control. In this report, we developed the Au@Ag core-shell nanorod structures for contaminants sensing by surface-enhanced Raman spectroscopy (SERS). The silver shell thickness and the corresponding plasmon wavelength of Au@Ag core-shell nanorods were tuned by changing the coating time and the silver precursor amount. Moreover, these structures exhibit ultra-sensitive detection ability for Nile blue A dye and Fenobucarb pesticide sensing by SERS. Interestingly, the highest Raman enhancement factor is obtained for the Au@Ag core-shell sample with a minimal silver shell thickness leaded by the optimal enhancement of the electromagnetic field of bimetallic structures. Hence, our report demonstrates that the combination of unique features of two plasmonic metals into core-shell structures promises potential applicability in SERS-based analysis.
RESUMEN
Food choices that shape human diets and health are influenced by various socio-economic factors. Vietnam struggles to meet many nutrition targets where links between food choice and diet have not been widely explored. This study assesses the food choice motives, based on a 28-item food choice questionnaire (FCQ), and the diet quality of 603 adults in three sites (urban, peri-urban, and rural) in northern Vietnam. We assess diet quality using the Diet Quality Index-Vietnam (DQI-V) which consists of variety, adequacy, moderation, and balance components. Using factor analysis, we grouped FCQ items into five factors: health focus, sensory appeal, mood ethics, convenience, and familiarity. The structural equation modeling indicates that food choice motives significantly impact the DQI-V and its components but in different directions. The results show that sensory appeal has a positive association with the overall DQI-V score, while having a negative impact on the variety component. Findings present a potential trade-off issue for interventions and policies related to food products. Nutrition knowledge is positively associated with all elements of diet quality across all three study sites. Vietnamese agrobiodiversity could be better utilized to increase dietary diversity. Differentiated policies are necessary to address the poor dietary diversity and adequacy in northern Vietnam.
RESUMEN
BACKGROUND COVID-19 is a pandemic caused by a coronavirus that has only recently been discovered. The disorder is characterized by persistent respiratory system malfunction, which can range from modest difficulty breathing to potentially lethal complications such as acute respiratory distress syndrome. Additional organs are affected as a result of its presence. An adverse impact of COVID-19 infection is myocarditis, which is a condition that affects the heart muscle. CASE REPORT We describe the case of a 38-year-old woman who was hospitalized at University Medical Center Ho Chi Minh City following a 15-day fever, a 3-day bout of dyspnea, and a positive nasal PCR SAR-CoV-2 test. The Lake Louise criteria were used to determine that the patient had a high probability of having myocarditis. She was then treated with oxygen treatment, vasoconstrictor medicines, inotropic therapy, and cornerstone heart failure medications, and was discharged 2 weeks later after a complete recovery. CONCLUSIONS Myocarditis has been identified as a cause of death in COVID-19, although it is not known how common the ailment is in the general population. Early detection and complete treatment, which should include support for the cardiovascular system, are consequently critical for successful outcomes. Magnetic resonance imaging (MRI) of the cardiovascular system (cardiac MRI) is the most important noninvasive method for diagnosing myocarditis.