One-pot synthesis of net-like silica materials with double mesoporous structure

Micro & nano letters

article

Yuanyuan Ma¹  Qingfang Deng¹  Zhuanfang Zhang¹  Huanhuan Li¹  Lihua Jia¹ 

[1] College of Chemistry and Chemical Engineering, Qiqihar University

关键词: nitrogen;    silicon compounds;    mesoporous materials;    X-ray scattering;    scanning electron microscopy;    transmission electron microscopy;    adsorption;    nanoporous materials;    nanofabrication;    net-like silica materials;    double mesoporous structure;    one-pot hydrothermal synthesis;    P123 pluronic copolymer;    OP-10 nonionic surfactant;    potassium fluoride;    small-angle X-ray scattering;    scanning electron microscopy;    transmission electron microscopy;    physical properties;    three-dimensional morphology;    nitrogen adsorption isotherm;    N2;    SiO2;   

DOI  :  10.1049/mnl.2016.0571

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Use of ultrasound (US) is standard of care these days for central venous access[1]. Traditionally, a 22 or 25 gauge seeker needle (injection) was used to locate the internal jugular vein. After the introduction of US in clinical practice introducer needles are now used alone for localization and threading guide wires into central veins. In our University-hospital based Department, Arrow®triple lumen catheter sets are being used, containing an 18G 2.5″ (6.35 cm) needle as introducer. Approximately two thousand central lines are placed under US annually and our faculty has largely discarded the practice of using seeker needles. The depth and coordinates3,4 of internal jugular vein are estimated by using the calibrated view on the display screen of the ultrasound machine.

【 授权许可】

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