Now showing items 11-20 of 28
Chemical extraction of indigo from Indigofera tinctoria while attaining biological integrity
(Kluwer Academic Publishers; Springer Science+Business Media, 1999-08)
Indigofera tinctoria was permeabilized with 20% methanol (v/v) at 25 °C and released 8±2 μg indigo g −1 dry plant material (excluding roots). This is equivalent to 42±11% of the total indican within the cells. The plants ...
Functionalized polyhedral oligosilsesquioxane (POSS) macromers: new graftable POSS hydride, POSS α-olefin, POSS epoxy, and POSS chlorosilane macromers and POSS–siloxane triblocks
(John Wiley & Sons, Ltd., 1999-04)
A series of polyhedral oligomeric silsesquioxanes (POSS) monomers bearing silane or α-olefin substituents have been prepared and their chemistry explored. Both the POSS silanes and α-olefin monomers readily participate in ...
Sonogels and derived materials
(John Wiley & Sons, Ltd., 1999-05)
Nowadays the sol–gel process is used by an increasing number of researchers for the preparation of various products, including bulk materials, films, membranes or fibers. The application of ultrasound (sonocatalysis) to ...
Synthesis and characterization of nanocomposite films with a titania glass matrix by the sol–gel route
(John Wiley & Sons, Ltd., 1999-05)
Films of thickness ∼3 µm containing nanosized metal particles of iron, nickel and copper respectively were grown on a Corning glass slide using a sol-gel technique. The particle sizes had values in the range 6.8 to 20.1 14nm. ...
Synthetic nano-scale fibrous extracellular matrix
(John Wiley & Sons, Inc., 1999-07)
Biodegradable polymers have been widely used as scaffolding materials to regenerate new tissues. To mimic natural extracellular matrix architecture, a novel highly porous structure, which is a three-dimensional interconnected ...
Silsesquioxanes as models of silica supported catalyst I. [3-(Diphenylphosphino)propyl]-hepta[propyl]-[octasilsesquioxane] and [3-mercapto-propyl]-hepta[propyl]-[octasilsesquioxane] as ligands for transition-metal ions * Dedicated to Professor Manfred Weidenbruch on the occasion of his 60th birthday.
(John Wiley & Sons, Ltd., 1999-04)
The ligand [3-(diphenylphosphino)propyl]-hepta[propyl]-[octasilsesquioxane] (dpps) can be prepared by reacting [3-chloropropyl]-hepta[propyl]-[octasilsesquioxane] (cs) with KP(Ph) 2 . The transition-metal complexes ...
Monosubstituted octasilasesquioxanes
(John Wiley & Sons, Ltd., 1999-04)
Octasilasesquioxanes are cube-shaped molecules consisting of a Si 8 O 12 core and eight reactive sites, which can, in principle, all be functionalized differently. This review article provides an overview of the work, ...
Organosilanetriols: model compounds and potential precursors for metal-containing silicate assemblies Dedicated to Professor Manfred Meisel on the occasion of his 60th birthday
(John Wiley & Sons, Ltd., 1999-04)
The chemistry of silanols and related amino-silanes is a topic of current interest in view of their possible applications as building blocks in materials science. In particular, discrete silanetriols and triaminosilanes ...
Siloxane network formation from the Si 8 O 20 8− silicate species and dimethyldichlorosilane
(John Wiley & Sons, Ltd., 1999-04)
Organic-silica hybrids were synthesized from the Si 8 O 20 8− silicate anion by the reaction with an excess of dimethyldichlorosilane. The structure of the hybrids has been found to comprise the Si 8 O 20 8− structure ...
Synthesis and applications of TEOS/PDMS hybrid material by the sol–gel process
(John Wiley & Sons, Ltd., 1999-05)
An organically modified silicate, ormosil, was synthesized with an inorganic precursor, (tetraethoxysilane, TEOS) and an organic precursor [poly(dimethylsiloane), PDMS] through sol–gel chemistry. The bonding characteristics ...