Ho Chi Minh City Open University Journal of Science
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Is Low-free Triiodothyronine (fT3) Associated with Increased Morbidity in Patients Admitted to Coronary Care Units?
No full textBACKGROUND: The effects of thyroid hormone on patients hospitalized in coronary intensive care units are still controversial. OBJECTIVE: We retrospectively examined thyroid hormone levels and their impact on cardiovascular morbidity in patients admitted to coronary intensive care units. METHODS: A total of 208 (Female/Male; 46.6%/53.4%) patients without any history of thyroid disease were enrolled and screened. Patients with specific heart disease and existing thyroid hormone parameters were included in the study. Low triiodothyronine syndrome is characterized by reduced serum total or free T3 (fT3) concentrations in normal free T4 (fT4) and TSH levels. RESULTS: The common diagnosis of the patients in the coronary care unit is acute coronary syndrome (n = 59, 28.2 %) and heart failure (n = 46, 23.3%). Patients were divided into two groups according to left ventricular ejection fraction percentages (LVEF ≤39% vs LVEF ≥40%). Plasma fT3 levels were significantly correlated with low LVEF (≤39%) (p =0.002). fT3 (r = -0.183, p =0.013) and hospitalization etiology (r = -0.161, p =0.023) were also the most critical parameters affecting the length of hospitalization. CONCLUSION: Low fT3 was associated with reduced ejection fraction and prolonged hospitalization, which may lead to potential morbidities in HF patients and may be useful in risk stratification and treatment strategies
Electropolymerized Polypyrrole Coatings Doped with Olive Leaf Extract for Corrosion and Biofouling Protection of Stainless Steel in Marine Environment
No full textBiofouling and corrosion significantly impair the longevity and performance of marine infrastructure, leading to substantial economic and ecological costs. This study investigates the dual protective function of polypyrrole (PPy) coatings doped with olive leaf extract (OLE) on stainless steel (SS) substrates. The coatings were electrochemically synthesized via cyclic voltammetry and subjected to a seven-day, in-situ exposure in natural Mediterranean seawater. Surface characterization using scanning electron microscopy (SEM), atomic force microscopy (AFM), epifluorescence imaging, and crystal violet staining revealed a significant reduction in biofilm development on the OLE-doped coatings. Furthermore, electrochemical impedance spectroscopy (EIS) and anodic polarization tests demonstrated a marked improvement in corrosion resistance. Among the formulations tested, SS/PPy-LE30 exhibited the most effective antifouling (ANFO) and anticorrosion (ANCO) properties. The incorporation of OLE, a bio-based and nontoxic additive, substantially enhanced the structural integrity and functional performance of the PPy coatings. These findings indicate that OLE-modified PPy films are promising sustainable alternatives to conventional toxic marine coatings. This study underscores the potential of green additives in advancing eco-friendly surface engineering strategies for marine protection
Integrating holistic strategies into disaster management: Managing physical, psychological, and social impacts of disasters
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