Synthesis of Mesoporous Zeolite A by Resorcinol−Formaldehyde Aerogel Templating

Langmuir ◽  
2005 ◽  
Vol 21 (2) ◽  
pp. 504-507 ◽  
Author(s):  
Yousheng Tao ◽  
Hirofumi Kanoh ◽  
Katsumi Kaneko
Keyword(s):  
Zeolite A ◽  
Mesoporous Zeolite ◽  
Resorcinol Formaldehyde

Real-Time Monitoring of Anthocyanidin-Zeolite Complex Exposed to Skin Cells

2013 ◽  
Vol 339 ◽  
pp. 742-747
Author(s):  
Aroonsri Priprem ◽  
Supatra Porasuphatana ◽  
Sakolthep Srirak ◽  
Wiboon Pantu ◽  
Teerasak Damrongrungrueng ◽  
...  
Keyword(s):  
Real Time ◽  
Langmuir Adsorption Isotherm ◽  
Cell Analysis ◽  
Zeolite A ◽  
Mesoporous Zeolite ◽  
Clitoria Ternatea ◽  
Langmuir Adsorption ◽  
Skin Cells ◽  
Household Products ◽  
Human Epidermoid Carcinoma

Effect of an anthocyanidin-zeolite complex (A-Z) was investigated by real-time cell analysis in cultured human epidermoid carcinoma keratinocytes (A431) and human forehead fibroblasts (HFF). A mesoporous zeolite, a potential adsorbent applied in household products, was complexed with an anthocyanidin, extracted from blue flowers ofClitoria ternateaLinn. The A-Z was linearly correlated within a range of 0.05 0.3 mg/ml of the anthocyanidin, analyzed by HPLC, in accordance to Langmuir adsorption isotherm (r= 0.992,p> 0.05). In comparison to zeolite or anthocyanidin alone, A431 and HFF showed significantly cell survival with improved IC50upon exposure to A-Z (p< 0.05). The adsorbed anthocyanidin onto the zeolite reduced the toxic potentials of each.

A Resorcinol-Formaldehyde Resin as an Embedding Material for Electron Microscopy of Membranes

1969 ◽  
Vol 27 ◽  
pp. 328-329 ◽  
Author(s):  
J. G. Robertson ◽  
D. F. Parsons
Keyword(s):  
Electron Microscopy ◽  
Osmium Tetroxide ◽  
Neutral Lipids ◽  
Lipid Extraction ◽  
Water Soluble ◽  
Formaldehyde Resin ◽  
Electron Microscope Autoradiography ◽  
Resorcinol Formaldehyde ◽  
Major Disadvantage ◽  
Cell Organization

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.

Sign in / Sign up

Export Citation Format

Share Document