Synthesis and electromagnetic properties of Fe/SiO 2 yolk/shell nanospheres with improved oxidation resistance

Micro & nano letters

article

Li-Shun Fu¹  Jian-Tang Jiang¹  Cheng-Yan Xu¹  Yuan-Xun Gong¹  Liang Zhen¹ 

[1] School of Materials Science and Engineering, Harbin Institute of Technology;MOE Key Laboratory of Micro-systems and Micro-structures Manufacturing, Harbin Institute of Technology

关键词: eddy currents;    electrical conductivity;    iron;    magnetisation;    nanocomposites;    nanofabrication;    oxidation;    particle reinforced composites;    silicon compounds;    nanomagnetics;    Fe-SiO2;    size 2 mm;    coatings;    effective absorption band;    reflection loss;    sillica;    iron particles;    eddy current effect;    microwave band;    morphology;    hydrogen-thermal reduction;    oxidation resistance;    monodispersed yolk-shell nanospheres;    electromagnetic properties;   

DOI  :  10.1049/mnl.2013.0009

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Aim: Since tonsillectomies and/or adenoidectomies performed in the pediatric age group under general anesthesia have a high rate of postoperative nausea and vomiting (PONV), the practice of using prophylactic antiemetic drugs is common. This study aimed to compare the benefits of systemic administration of a low dose of inj. methylprednisolone 1 mg/kg with inj. metoclopramide 0.15 mg/kg IV for the prevention of PONV in children undergoing adenotonsillectomy. Methodology: In this study, the files of children undergone adenotonsillectomy from August 2015 to January 2018 in our hospital were analyzed retrospectively. 408 children aged 4-12 years were included in the study. Patients who were given methylprednisolone 1 mg/kg IV as premedication were placed in Group P, and patients who received metoclopramide 0.15 mg/kg were grouped as Group M. Effects on PONV, vomiting episodes, oral intake time, postoperative analgesic requirement, postoperative respiratory complications, and drug side effects were recorded. Results: Vomiting rates between 1-4 hrs (late period) were 11.0% in Group M (n = 22); It was 3.8% (n = 8) in Group P. In the late period, a significant difference was found between the two groups in terms of nausea and vomiting (p = 0.02, p = 0.07, respectively). In Group M, the incidence of respiratory complications was also higher in the postoperative period compared to Group P. Postoperative acetaminophen requirement increased significantly in group M compared to Group P (p = 0.006). Conclusion: Prophylactic use of a single dose of methylprednisolone 1 mg/kg IV during the preoperative period was more effective in reducing the incidence of late postoperative vomiting compared to metoclopramide and led to earlier tolerance of oral intake. In addition to its anti-inflammatory properties and antiemetic effects, low-dose methylprednisolone is also useful for prevention of respiratory complications.

【 授权许可】

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