Facile hydrothermal synthesis of ultra-long manganese oxyhydroxide nanorods and their transformation into MnO 2 and Mn 2 O 3 nanorods

Micro & nano letters

article

Zhong Chun Li¹  Si Si Chen¹  Chao Dong¹  Xu Hong Chen¹  Quan Fa Zhou¹ 

[1] School of Chemistry and Environment Engineering, Jiangsu University of Technology

关键词: calcination;    Fourier transform spectra;    infrared spectra;    manganese compounds;    nanofabrication;    oxidation;    reduction (chemical);    scanning electron microscopy;    solid-state phase transformations;    transmission electron microscopy;    X-ray diffraction;    nanorods;    MnOOH;    size 100 nm to 400 nm;    calcination;    Ostwald ripening process;    Fourier transform infrared spectroscopy;    high-resolution transmission electron microscopy;    scanning electron microscopy;    X-ray diffraction;    mass ratio;    reaction time;    reaction temperature;    polyvinyl pyrrolidone;    potassium permanganate;    redox;    phase transformation;    ultralong single-crystal manganese oxyhydroxide nanorods;    facile hydrothermal method;   

DOI  :  10.1049/mnl.2013.0010

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Background: The study aimed to investigate the out-of-range cuff pressure of endotracheal tube in mechanically ventilated patients. Methodology: This cross-sectional study was performed in Semnan, Iran in 2019. The cuff pressure was measured in patients aged over 18 years who were intubated for at least 24 hours. Out-of-range pressure was defined as a pressure of 30 cmH2O. A multiple logistic regression model was used for analysis. Results: Of 222 cases, 67 (30.2%) had cuff pressure in the normal range and 155 (69.8%) were not in the normal range; 41 (18.5%) and 114 (51.4%) had low and high pressures. The two groups were not significantly different in terms of age and gender. Longer mechanical ventilation (p = 0.004) and hospitalization place (p = 0.001) were the two factors that had a relationship with the out-of-range pressure. The probability of out-of-range pressure was significantly higher in the cardiac (p = 0.001, OR = 6.91) and internal medicine (p = 0.008, OR = 4.61), compared to the emergency intensive care unit. Conclusion: The authorities should take into consideration some important factors, such as the lack of instructions in hospital units, lack of proficiency for correct measurement, deficient required facilities, and not using the facilities for regular monitoring.

【 授权许可】

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