Synthesis and Characterization of Soluble Alkyl Substituted Poly(2, 5-Thienylene Vinylenes)

1992 ◽  
Vol 247 ◽  
Author(s):  
M. Catellani ◽  
W. Porzio ◽  
A. Musco ◽  
R. Pontellini
Keyword(s):  
Spectral Range ◽  
Visible Spectral Range ◽  
Synthesis And Characterization ◽  
New Synthesis ◽  
Electrochromic Effect

ABSTRACTAlkyl substituted poly(2, 5-thienylenevinylene)s were produced with a new synthesis. The polymers are soluble and processable and show a strong electrochromic effect in the visible spectral range.

Synthesis and Characterization of Biphasic Calcium Phosphate/ Poly-(DL-Lactide-Co-Glycolide) Biocomposite

2005 ◽  
Vol 494 ◽  
pp. 537-542 ◽  
Author(s):  
M. Radić ◽  
N. Ignjatović ◽  
Zoran Nedić ◽  
M. Mitrić ◽  
Dejan Miličević ◽  
...  
Keyword(s):  
Composite Material ◽  
Calcium Phosphate ◽  
Biphasic Calcium Phosphate ◽  
Synthesis Method ◽  
Synthesis And Characterization ◽  
Chemical Methods ◽  
X Ray ◽  
Precipitation Technique ◽  
New Synthesis

In this paper we report the results on synthesis of a composite biomaterial based on biphasic calcium phosphate (BCP) and poly-(DL-lactide-co-glycolide) (DLPLG). Besides, we have investigated the influence of new synthesis method on the structure and characteristics of the composite. The synthesis of biphasic calcium phosphate from Ca(NO3)2 x 4H2O and (NH4)3 PO4 in alkali environment was performed by means of precipitation technique. Composite material BCP/DLPLG was first prepared from commercial granules using chemical methods. Powdered polymer DLPLG was then homogenized at appropriate ratio with addition of biphasic calcium phosphate into the suspension. All samples were characterized by DSC, IR, X-Ray and SEM techniques.

scholarly journals New Synthesis and Characterization of Aminonaphthoquinone Dyes

1980 ◽  
Vol 53 (4) ◽  
pp. 197-202 ◽  
Author(s):  
Toshio TAKEI ◽  
Masaru MATSUOKA ◽  
Teijiro KITAO
Keyword(s):  
Synthesis And Characterization ◽  
New Synthesis

A new synthesis and characterization of magnesium-aluminium hydroxides

1980 ◽  
Vol 43 (329) ◽  
pp. 619-621 ◽  
Author(s):  
G. Mascolo ◽  
O. Marino
Keyword(s):  
General Formula ◽  
Axial Length ◽  
Electrostatic Attraction ◽  
Synthesis And Characterization ◽  
Cell Parameters ◽  
Al Content ◽  
New Synthesis ◽  
Thermal Data ◽  
Double Hydroxides

SummaryA new synthesis of Mg-Al double hydroxides is described, that gives products relatively low (0.8–1.0%) in CO2. The general formula [Mg1−xAlx (OH)2][(OH)x(H2O)0.81−x] with 0.23 ≤ x ≤ 0.33 is proposed. Cell parameters and thermal data are given. The c-axial length decreases with Al-content; this is attributed to increased electrostatic attraction between layers.

scholarly journals Broadband spectroscopy for characterization of tissue-like phantom optical properties

2017 ◽  
Vol 23 (4) ◽  
pp. 121-126 ◽  
Author(s):  
Ali Shahin ◽  
Wesam Bachir
Keyword(s):  
Optical Properties ◽  
Absorption Coefficient ◽  
Spectral Range ◽  
Diffuse Reflectance ◽  
Visible Spectral Range ◽  
Scattering Coefficient ◽  
Visible Range ◽  
Broadband Spectroscopy ◽  
Analytical Expressions

Abstract Optical phantoms are widely used for evaluating the performance of biomedical optical modalities, and hence, absorbing and scattering materials are required for the construction of optical phantoms. Towards that aim, new readily available and inexpensive black Ink (Parker) as a simulating absorber as well as Intralipid 20% as a simulating scatterer are thoroughly investigated. Broadband Transmittance and Diffuse reflectance spectroscopic measurements were performed in the visible range 400 – 700 nm. Optical properties of the phantom materials are determined. Analytical expressions for absorption and scattering coefficient related to the concentrations and wavelength of the Parker ink and Intralipid are also presented and discussed. The results show nonlinear trend in the absorption coefficient of Parker ink over the examined visible spectral range. Furthermore, Intralipid scattering coefficient variation across the mentioned spectral range shows a tissue-like scattering trend. The findings demonstrate the capability of the broadband transmission and diffuse reflectance for characterizing tissue-like phantom materials in the examined spectral range.

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