نتایج جستجو برای: chemical material

تعداد نتایج: 718865  

2016
Jia Zhang Huaibing Song Dawen Zeng Hao Wang Ziyu Qin Keng Xu Aimin Pang Changsheng Xie

Recently, graphene nanomesh (GNM) has attracted great attentions due to its unique porous structure, abundant active sites, finite band gap and possesses potential applications in the fields of electronics, gas sensor/storage, catalysis, etc. Therefore, diverse GNMs with different physical and chemical properties are required urgently to meet different applications. Herein we demonstrate a faci...

2011
Hortance Manda Luana M. Arce Tarra Foggie Pankhil Shah John P. Grieco Nicole L. Achee

BACKGROUND Previous studies have identified the behavioral responses of Aedes aegypti to irritant and repellent chemicals that can be exploited to reduce man-vector contact. Maximum efficacy of interventions based on irritant chemical actions will, however, require full knowledge of variables that influence vector resting behavior and how untreated "safe sites" contribute to overall impact. M...

2016
G. Cao H. Brinkman J. Meijerink K. De Vries A. Burggraaf

This paper reports a kinetic study on modified CVD process in porous ceramic substrates by both theoretical analysis and experimental approach. The theoretical analysis indicates that with a heterogeneous chemical reaction the decrease of the pore size is proportional to the deposition time and the pore closure time is proportional to the original pore size. While for a homogeneous reaction the...

2003
M. Jaroniec Y. Bereznitski M. E. Gangoda R. K. Gilpin

Surface properties carbonaceous materials are often modified by chemical deposition in order to expand the range of their applications | 11. However, the exact nature of the chemical deposition process is not completely understood. The layers of deposited material may exhibit a high degree of inhomogeneity., which results in inadequate performance of the modified material in the targeted applic...

2012
D. DOBROTĂ

D. Dobrotă, C. Iancu, Engineering Faculty, “Constantin Brâncuşi” University of Târgu-Jiu, Romania This paper presents the results of the main changes in the chemical composition of the material, and changes in its hardness. The changes in terms of chemical composition refer primarily to changes in concentration of sulfur and carbon, and in terms of hardness material change there can be noticed ...

Journal: :Journal of visualized experiments : JoVE 2014
Matthew P Willis Shawn M Stevenson Thomas P Pearl Brent A Mantooth

The ability to directly characterize chemical transport and interactions that occur within a material (i.e., subsurface dynamics) is a vital component in understanding contaminant mass transport and the ability to decontaminate materials. If a material is contaminated, over time, the transport of highly toxic chemicals (such as chemical warfare agent species) out of the material can result in v...

پایان نامه :0 1371

the treatment of in completely formed pulpless teeth has presented considrable problems. these teeth have wide open apexes and the walls of the root canal diverge toward the apical tissues. mechanical preparation cannot be done in the normal manner beacause of the large initial size and the taper of apical part of the canal , a mechanical stop cannot be produced at the apex of the canal and , t...

Journal: :Chemical Bulletin of Kazakh National University 2011

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید