Compatibility of Resorcinol–Formaldehyde Resin with Polyester Cord

2008 ◽  
Vol 35 (1) ◽  
pp. 23-24 ◽  
Author(s):  
I. L. Shmurak
Author(s):  
J. G. Robertson ◽  
D. F. Parsons

The extraction of lipids from tissues during fixation and embedding for electron microscopy is widely recognized as a source of possible artifact, especially at the membrane level of cell organization. Lipid extraction is also a major disadvantage in electron microscope autoradiography of radioactive lipids, as in studies of the uptake of radioactive fatty acids by intestinal slices. Retention of lipids by fixation with osmium tetroxide is generally limited to glycolipids, phospholipids and highly unsaturated neutral lipids. Saturated neutral lipids and sterols tend to be easily extracted by organic dehydrating reagents prior to embedding. Retention of the more saturated lipids in embedded tissue might be achieved by developing new cross-linking reagents, by the use of highly water soluble embedding materials or by working at very low temperatures.


RSC Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 7033-7040 ◽  
Author(s):  
Viktor M. Bogatyrov ◽  
Mariia V. Galaburda ◽  
Waldemar Tomaszewski ◽  
Jadwiga Skubiszewska-Zięba

This is the first application of composites containing carbon nanofillers as effective adsorbents for SPE of explosives from aqueous samples.


RSC Advances ◽  
2015 ◽  
Vol 5 (3) ◽  
pp. 2088-2095 ◽  
Author(s):  
Binbin Chang ◽  
Baocheng Yang ◽  
Yanzhen Guo ◽  
Yiliang Wang ◽  
Xiaoping Dong

This paper describes the preparation of graphitic porous carbon spheres (GPCS) from spherical resorcinol/formaldehyde resin by Fe-catalysis at 900 °C.


2015 ◽  
pp. 181-185
Author(s):  
V. W. Armstrong ◽  
C. Fuchs ◽  
H. Kl�ver ◽  
D. Nussbaumer ◽  
H. Perl ◽  
...  

2019 ◽  
Vol 54 (12) ◽  
pp. 1932-1941 ◽  
Author(s):  
Sandra K. Fiskum ◽  
Heather A. Colburn ◽  
Amy M. Rovira ◽  
Jarrod R Allred ◽  
Margaret R. Smoot ◽  
...  

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Yasuhiro Shiraishi ◽  
Takumi Hagi ◽  
Masako Matsumoto ◽  
Shunsuke Tanaka ◽  
Satoshi Ichikawa ◽  
...  

AbstractThe photocatalytic generation of hydrogen peroxide from water and dioxygen (H2O + 1/2O2 → H2O2, ΔG° = +117 kJ mol–1) under sunlight is a promising strategy for the artificial photosynthesis of a liquid fuel. We had previously found that resorcinol–formaldehyde (RF) resin powders prepared by the base-catalysed high-temperature hydrothermal method act as semiconductor photocatalysts for H2O2 generation. Herein, we report that RF resins prepared by the acid-catalysed high-temperature hydrothermal method (~523 K) using common acids at pH < 4 exhibit enhanced photocatalytic activity. The base- and acid-catalysed methods both produce methylene- and methine-bridged resins consisting of π-conjugated and π-stacked benzenoid–quinoid donor–acceptor resorcinol units. The acidic conditions result in the resins with a lower bandgap (1.7 eV) and higher conductivity because the lower-degree of crosslinking creates a strongly π-stacked architecture. The irradiation of the RF-acid resins with simulated sunlight in water with atmospheric-pressure O2 generates H2O2 at a solar-to-chemical conversion efficiency of 0.7%, which is the highest efficiency ever reported for powder catalysts used in artificial photosynthesis.


Carbon ◽  
2004 ◽  
Vol 42 (1) ◽  
pp. 169-175 ◽  
Author(s):  
Toshihide Horikawa ◽  
Jun’ichi Hayashi ◽  
Katsuhiko Muroyama

2011 ◽  
Vol 21 (8) ◽  
pp. 2663 ◽  
Author(s):  
Kai Zhang ◽  
Bao Ting Ang ◽  
Li Li Zhang ◽  
Xiu Song Zhao ◽  
Jishan Wu

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