Influence of DPPC layers and PLA2on surface properties of silica particles

2015 ◽  
Vol 3 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Aleksandra Szczes ◽  
Lucyna Holysz
Keyword(s):  
Surface Properties ◽  
Silica Particles

Surface Properties and Porosity of Silica Particles Studied by Wide-Angle Soft X-ray Scattering

2020 ◽  
Vol 124 (30) ◽  
pp. 16663-16674 ◽  
Author(s):  
Christopher Raschpichler ◽  
Christian Goroncy ◽  
Burkhard Langer ◽  
Egill Antonsson ◽  
Bernhard Wassermann ◽  
...  
Keyword(s):  
Surface Properties ◽  
Silica Particles ◽  
Wide Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Rheology of molding materials for extruding billets to obtain copper-containing alumina-silica catalysts

2020 ◽  
pp. 23-28
Author(s):  
V. I. Vanchurin ◽  
A. V. Belyakov ◽  
D. Sh. Dzhumamuhamedov ◽  
A. V. Fedotov
Keyword(s):  
Mechanical Properties ◽  
Surface Properties ◽  
Active Component ◽  
Silica Particles ◽  
Screw Press ◽  
High Quality ◽  
Catalyst Synthesis ◽  
Plastic Mass ◽  
Molding Materials ◽  
Screw Extruders

Using the example of the CAS ‒ C ceramic copper-aluminumsiliceous catalyst for dehydrogenation of cyclohexanol to cyclohexanone in the production of urea, the rheological and mechanical properties of the copper-containing aluminumsiliceous plastic mass depending on its composition are studied. The data on the influence of technological and structural conditions for molding the mass in a screw press on the performance of extrudable ceramic billets are presented. The revealed features in the behavior of the moldable plastic mass are explained by differences in the surface properties of silica particles interacting with the precursor of the active component at the stage of catalyst synthesis. The composition of the molding mass and the extrusion regimes on screw extruders are established, which ensure the output of high-quality and mechanically strong ceramic billets (extrudates).

Preparation and surface properties of mesoporous silica particles modified with poly(N-vinyl-2-pyrrolidone) as a potential adsorbent for bilirubin removal

2014 ◽  
Vol 147 (3) ◽  
pp. 673-683 ◽  
Author(s):  
Alexander Timin ◽  
Evgeniy Rumyantsev ◽  
Sergey N. Lanin ◽  
Sveta A. Rychkova ◽  
Sabir S. Guseynov ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Surface Properties ◽  
Silica Particles

scholarly journals Time-course Analysis of Pulmonary Inflammation Induced by Intratracheal Instillation of Fine Crystalline Silica Particles

2020 ◽  
Author(s):  
Toshio Kobayashi ◽  
Yasuhiro Tsubokura ◽  
Yutaka Oshima ◽  
Takeshi Sasaki ◽  
Kenji Kawaguchi ◽  
...  
Keyword(s):  
Lymph Node ◽  
Lymph Nodes ◽  
Surface Properties ◽  
Time Course ◽  
Pulmonary Inflammation ◽  
Intratracheal Instillation ◽  
Silica Particles ◽  
Crystalline Silica ◽  
Lung Burden

Abstract Background: Crystalline silica is an important cause of serious pulmonary diseases. The relationship between this hazard and various physicochemical parameters of crystalline silica has been studied for more than a century, and the toxic potential of silica is known to be associated with its surface properties. However, no in vivo dataset has yet been accumulated to clarify the relevance of this, especially regarding longer term effects. To provide new insights into these longer term effects, we performed single intratracheal instillation testing of five different crystalline silicas and assessed the time-course changes in pulmonary inflammation, lung burden, and thoracic lymph node loads. The tested silicas were prepared from two commercial products [Min-U-Sil5 (MS5, US Silica Company) and SIO07PB (SPB, Kojundo Chemical)] by using three different pretreatment steps: centrifugation (C), grinding (G), and surface dissolving (D). The five types of silica particles—MS5, MS5_C, SPB_C, SPB_G, and SPB_D—were suspended in purified water and intratracheally instilled into male F344 rats. Bronchoalveolar lavage, lung burden analysis, and histopathological examination were performed 3, 28, and 91 days after instillation.Results: MS5 and MS5_C provoked similar biphasic inflammation that differed in severity: MS5 induced granuloma generation 91 days after instillation, whereas the smaller particles of MS5_C elicited only macrophage aggregation. SPB_C induced severe and persistent inflammation, whereas SPB_G and SPB_D induced only slight and transient acute inflammation. All of the silicas were dose-dependently retained in the lung. Silicas that induced prolonged responses were translocated to the thoracic lymph nodes as early as 28 days after instillation. Those that induced transient inflammation were removed effectively from the lung with very little lymph node retention. No quantitative association was identified between lung retention and physicochemical properties, although common features of the retained materials seemed to be reduced solubility, similar surface properties, and relatively small particle. Conclusion: Our key findings suggest that prolonged silica toxicity occurs through lymph node retention. Although the main drivers of translocation to the lymph nodes have not yet been clarified, we provide in vivo evidence of the contributions of at least silica solubility, surface properties, and particle size.

Hemolysis of silica particles: Importance of surface properties and plasma corona

2012 ◽  
Vol 211 ◽  
pp. S203
Author(s):  
Jingwen Shi ◽  
Yolanda Hedberg ◽  
Maria Lundin ◽  
Inger Odnevall Wallinder ◽  
Hanna Karlsson ◽  
...  
Keyword(s):  
Surface Properties ◽  
Silica Particles ◽  
Plasma Corona

AFM investigation of the surface properties of silica particles dispersed by bead milling

2010 ◽  
Vol 362 (1-3) ◽  
pp. 97-101 ◽  
Author(s):  
Tetsuya Yamamoto ◽  
Yoshitaka Harada ◽  
Kunihiro Fukui ◽  
Hideto Yoshida
Keyword(s):  
Surface Properties ◽  
Silica Particles ◽  
Bead Milling

Surface properties of nanosize hollow silica particles on the molecular level

2007 ◽  
Vol 18 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Masayoshi Fuji ◽  
Chika Takai ◽  
Yoshie Tarutani ◽  
Takashi Takei ◽  
Minoru Takahashi
Keyword(s):  
Surface Properties ◽  
Molecular Level ◽  
Silica Particles ◽  
Hollow Silica ◽  
Hollow Silica Particles

Effect of Mineral Surface Properties on Water Behaviors in Pores Constructed by Calcite and Silica Particles

2019 ◽  
Vol 123 (21) ◽  
pp. 13288-13294
Author(s):  
Qianhong Wu ◽  
Yajun Deng ◽  
Xinxin Fan ◽  
Hailong Lu ◽  
Xiaomeng Wang ◽  
...  
Keyword(s):  
Surface Properties ◽  
Silica Particles ◽  
Mineral Surface
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