scholarly journals Preparation and Characterization of Colon-Targeted Particles of Pulsatilla chinensis Saponins

2015 ◽  
Vol 10 (2) ◽  
pp. 1934578X1501000 ◽  
Author(s):  
Zhenhua Chen ◽  
Yongmei Guan ◽  
Leilei Zhou ◽  
Ying Xu ◽  
Ming Yang ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Particle Size ◽  
Surface Characteristics ◽  
Shell Structures ◽  
Composite Particles ◽  
Core Shell ◽  
Eudragit S100 ◽  
Pulsatilla Chinensis ◽  
Diffraction Peaks

Pulsatilla chinensis (Bunge) Regel is a traditional Chinese medicine used to treat ulcerative colitis. This study prepared and characterized colon-targeted particles of P. chinensis saponins by particle design. Most of the P. chinensis saponins in the composite particles were coated with Eudragit S100, as seen in SEM micrographs; meanwhile, the characteristic diffraction peaks in X-RD, surface wettability, and particle size distribution of the composite particles were basically the same as those of Eudragit S100. These results suggested that the mechanochemical process could be used to prepare colon-targeted particles with core-shell structures with the drug coated by the excipient; the results also showed similar surface characteristics in the coating.

Synthesis and Characterization of ZnS: Fe/ZnS Core-Shell Nanocrystals

2011 ◽  
Vol 148-149 ◽  
pp. 900-903
Author(s):  
Li Hua Li ◽  
Yong Jun Gu ◽  
Rui Shi Xie ◽  
Jian Guo Zhu
Keyword(s):  
Chemical Precipitation ◽  
Precipitation Method ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Pl Spectra ◽  
Zinc Blende ◽  
Diffraction Peaks ◽  
Zns Nanocrystals ◽  
Zinc Blende Structure

ZnS:Fe and ZnS:Fe/ZnS core-shell nanocrystals were synthesized by chemical precipitation method. It was found that the ZnS: Fe based nanocrystals possess zinc blende structure. Compared to ZnS: Fe nanocrystals, the intensity of the X-ray diffraction peaks of ZnS: Fe/ZnS nanocrystals reduced and these peaks moved to lower angles. TEM images show that ZnS: Fe based nanocrystals are spheroidal and the average particles size is about 3~4 nm. PL spectra of ZnS: Fe nanocrystals revealed several mission bands, ~406nm, ~444nm, ~416nm, However, PL spectra of ZnS: Fe/ZnS nanocrystals showed several mission bands, ~420nm, ~432nm, ~449nm.

Novel Strategies for the Preparation of TiO2 Nanofibers

2004 ◽  
Vol 836 ◽  
Author(s):  
Kenneth J. Balkus ◽  
Chunrong Xiong ◽  
Minedys Macias-Guzman
Keyword(s):  
Titanium Oxide ◽  
High Surface ◽  
Shell Structures ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
Spider Webs ◽  
Tio2 Nanofibers ◽  
Electrostatic Deposition ◽  
Photovoltaic Applications

ABSTRACTThe various polymorphs of titanium oxide (TiO2) are probably the most widely studied materials for photovoltaic applications. It is well known that composition and particles size can have a profound effect on photoactivity. It is thought that high surface to volume nanostructures such as nanofibers and nanorods may possess the optimal properties. We have developed technology for the preparation of TiO2 nanofibers in a variety of forms including core shell structures, papers and films. The formation of mesoporous TiO2 fibers as spider webs and papers has been achieved by electrostatic deposition. The mesoporous fibers and other forms such as shaped particles and films have been employed as templates to grow TiO2 nanofibers in various configurations. The proposed research below will address the synthesis and characterization of the TiO2 fibers developed by these techniques

CNT/TiO2 core-shell structures prepared by atomic layer deposition and characterization of their photocatalytic properties

2016 ◽  
Vol 616 ◽  
pp. 151-159 ◽  
Author(s):  
Sheng-Hsin Huang ◽  
Chih-Chieh Wang ◽  
Shih-Yun Liao ◽  
Jon-Yiew Gan ◽  
Tsong-Pyng Perng
Keyword(s):  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Shell Structures ◽  
Photocatalytic Properties ◽  
Core Shell ◽  
Layer Deposition

scholarly journals Chemical and structural characterization of PbS-SiO2 Core-shell structures synthesized by ultrasonic wave-assisted chemical bath deposition

2015 ◽  
Vol 21 (S3) ◽  
pp. 1033-1034 ◽  
Author(s):  
P. Moreno-Wong ◽  
J. Alvarado-Rivera ◽  
Gemma Moreno ◽  
M. C. Acosta-Enriquez ◽  
S. J. Castillo
Keyword(s):  
Ultrasonic Wave ◽  
Chemical Bath Deposition ◽  
Structural Characterization ◽  
Shell Structures ◽  
Core Shell

Facile Electrochemical Characterization of Core/Shell Nanoparticles. Ag Core/Ag2O Shell Structures

Nano Letters ◽  
2007 ◽  
Vol 7 (5) ◽  
pp. 1406-1412 ◽  
Author(s):  
Jalal Ghilane ◽  
Fu-Ren F. Fan ◽  
Allen J. Bard ◽  
Nicholas Dunwoody
Keyword(s):  
Electrochemical Characterization ◽  
Shell Structures ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

scholarly journals Preparation and Characterization of Citrus Aurantifolia Lime Oils Microcapsules by Complex Coacervation Technique

2021 ◽  
Vol 71 (12) ◽  
pp. 146-155
Author(s):  
Euis Julaeha ◽  
Mohamad Nurzaman ◽  
Diana Rakhmawaty Eddy ◽  
Dikdik Kurnia ◽  
Sandra Puspita ◽  
...  
Keyword(s):  
Particle Size ◽  
Encapsulation Efficiency ◽  
Oil Content ◽  
Core Shell ◽  
Complex Coacervation ◽  
Citrus Aurantifolia ◽  
Particle Size Analyzer ◽  
Ratio Speed ◽  
Improved Performance

The Lime oil of Citrus aurantifolia was microencapsulated by coacervation technique employing gelatine and alginates as the shells, and calcium chloride as cross linker. Optimization of core/shell ratio, speed and temperature of stirring was carried out. Structure and shape of the microcapsules were characterized by particle size analyzer (PSA) and scanning electron microscope (SEM) respectively. The properties of microcapsules such as, yield, particle size distribution, oil content, oil load, and encapsulation efficiency were also determined. Upon condition of ratio core/shell 0.49, speed and temperature of stirring at 600 rpm and 35 �C respectively, the microcapsules of LOs with improved performance were achieved with efficiency of 46% and oil content of 78%.

Preparation and characterization of cross-linked β-cyclodextrin polymer/Fe3O4 composite nanoparticles with core-shell structures

2011 ◽  
Vol 22 (2) ◽  
pp. 217-220 ◽  
Author(s):  
Rui Xue Li ◽  
Shu Mei Liu ◽  
Jian Qing Zhao ◽  
Hideyuki Otsuka ◽  
Atsushi Takahara
Keyword(s):  
Shell Structures ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Cyclodextrin Polymer

Characterization of Core-Shell Structure Palygorskite Modified by Nano-CaCO3 (PnC) Composite Particles

2013 ◽  
Vol 750-752 ◽  
pp. 348-351
Author(s):  
Di Fang Zhao ◽  
Ming Hua Li ◽  
Jin Song Xie
Keyword(s):  
Thermal Stability ◽  
Shell Structure ◽  
Composite Particles ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Stability Properties ◽  
Structure Morphology ◽  
Palygorskite Clay ◽  
Core Shell Structure

In this work, Core-shell structure palygorskite/nanoCaCO3(PnC) composite particles have been synthesized chemically, employing solution precipitation methods. Crystal structure, morphology and thermal stability properties are investigated by means of X-ray diffraction (XRD), transmission electronic microscopy (TEM) and Thermogravimetric (TG) analysis. The results showed that the PnC particles were almost monodispersed microsphere aspect with the size was about 1-3 μm diameter. The nanocomposite particles exhibit the marked thermal stability properties than the palygorskite clay mineral.

Sign in / Sign up

Export Citation Format

Share Document