نتایج جستجو برای: ultrafine

تعداد نتایج: 4276  

2009
Wei Wu Xiangheng Xiao Shaofeng Zhang Lixia Fan Tangchao Peng Feng Ren Changzhong Jiang

The development of synthetic process for hollow silica materials is an issue of considerable topical interest. While a number of chemical routes are available and are extensively used, the diameter of hollow silica often large than 50 nm. Here, we report on a facial route to synthesis ultrafine hollow silica nanoparticles (the diameter of ca. 24 nm) with high surface area by using cetyltrimethy...

2013
John A. Lednicky Julia C. Loeb

The air we breathe contains microorganisms that can cause infectious respiratory diseases. After two occupants of an apartment were diagnosed with influenza in February of 2013, efforts were made to detect and isolate airborne influenza virus using two different types of active air samplers: a Sioutas Personal Cascade Impactor Sampler (PCIS) and an SKC BioSampler. The PCIS collects size-fractio...

2014
Hongxi Zhang Xuefeng Ding Zichen Wang Xu Zhao

Rice husk is an abundant agricultural by-product reaching the output of 80 million tons annually in the world. The most common treatment method of rice husk is burning or burying, which caused serious air pollution and resource waste. In order to solve this problem, a new method is proposed to comprehensively utilize the rice husk in this paper. Firstly, the D-xylose was prepared from the semic...

Journal: :Environmental Health Perspectives 2006

Journal: :Environment International 2014

Journal: :Materials research proceedings 2023

Abstract. Ultrafine-grained S322750 superduplex stainless steel has been obtained through high-pressure torsion (HPT) process. Microstructural evolution after the severe plastic deformation (SPD) shown no phase transformation. Isothermal heat treatment was applied process in order to promote secondary precipitation. Precipitation enhanced ultrafine-grained comparison coarse-grained at same isot...

Journal: :Materials transactions 2023

This paper presents an overview of fundamentals and potential applications ultrafine-grained Al-based conductors developed with the help severe plastic deformation (SPD) techniques. Based on deliberate formation nanoscale features (such as nanoprecipitates, segregation solutes along crystallographic defects so on) within ultrafine grains, it is possible to optimise their mechanical functional p...

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