With Phosphinophosphonic Acids to Nanostructured, Water-Soluble, and Catalytically Active Rhodium Clusters

2007 ◽  
Vol 46 (7) ◽  
pp. 1164-1167 ◽  
Author(s):  
Julija Glöckler ◽  
Stefan Klützke ◽  
Wolfgang Meyer-Zaika ◽  
Armin Reller ◽  
F. Javier García-García ◽  
...  
Keyword(s):  
Water Soluble ◽  
Rhodium Clusters ◽  
Catalytically Active

Water-Soluble Dendritic Architectures with Carbohydrate Shells for the Templation and Stabilization of Catalytically Active Metal Nanoparticles

2005 ◽  
Vol 38 (20) ◽  
pp. 8308-8315 ◽  
Author(s):  
Michael Krämer ◽  
Nelly Pérignon ◽  
Rainer Haag ◽  
Jean-Daniel Marty ◽  
Ralf Thomann ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Water Soluble ◽  
Active Metal ◽  
Catalytically Active

Catalytically active, magnetically separable, and water-soluble FePt nanoparticles modified with cyclodextrin for aqueous hydrogenation reactions

2009 ◽  
Vol 11 (9) ◽  
pp. 1337 ◽  
Author(s):  
Kohsuke Mori ◽  
Naoki Yoshioka ◽  
Yuichi Kondo ◽  
Tetsuya Takeuchi ◽  
Hiromi Yamashita
Keyword(s):  
Water Soluble ◽  
Fept Nanoparticles ◽  
Catalytically Active ◽  
Hydrogenation Reactions ◽  
Magnetically Separable

Water-soluble glycodendrimers: synthesis and stabilization of catalytically active Pd and Pt nanoparticles

2011 ◽  
Vol 52 (16) ◽  
pp. 1842-1846 ◽  
Author(s):  
Sylvain Gatard ◽  
Liyuan Liang ◽  
Lionel Salmon ◽  
Jaime Ruiz ◽  
Didier Astruc ◽  
...  
Keyword(s):  
Pt Nanoparticles ◽  
Water Soluble ◽  
Catalytically Active

Enhancing the biofuel upgrade performance for Pd nanoparticles via increasing the support hydrophilicity of metal–organic frameworks

2017 ◽  
Vol 201 ◽  
pp. 317-326 ◽  
Author(s):  
Qi Sun ◽  
Meng Chen ◽  
Briana Aguila ◽  
Nicholas Nguyen ◽  
Shengqian Ma
Keyword(s):  
Metal Organic Framework ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Water Soluble ◽  
Pyrolysis Oil ◽  
Lignin Fraction ◽  
Catalytically Active ◽  
Metal Organic ◽  
Hydrophobic Nature ◽  
Supported Pd

In this work, the influence of the hydrophilic/hydrophobic nature of metal–organic framework (MOF) materials on the catalytic performance of supported Pd nanoparticles for biofuel upgrade was studied. We show that the introduction of hydrophilic groups on a MOF can greatly enhance the performance of the resultant catalyst. Specifically, Pd nanoparticles supported on MIL-101–SO3Na with superhydrophilicity (Pd/MIL-101–SO3Na) far outperforms pristine MIL-101 and the benchmark catalyst Pd/C in the hydrodeoxygenation reaction of vanillin, a model component of pyrolysis oil derived from the lignin fraction. This is attributed to a favorable mode of adsorption of the highly water soluble reactants on the more hydrophilic support in the vicinity of the catalytically active Pd nanoparticles, thereby promoting their transformation.

Pd(ii)–NHC coordination-driven formation of water-soluble catalytically active single chain nanoparticles

2018 ◽  
Vol 9 (23) ◽  
pp. 3199-3204 ◽  
Author(s):  
Romain Lambert ◽  
Anne-Laure Wirotius ◽  
Sofiem Garmendia ◽  
Pierre Berto ◽  
Joan Vignolle ◽  
...  
Keyword(s):  
Suzuki Coupling ◽  
Water Soluble ◽  
Intramolecular Coordination ◽  
Single Chain ◽  
Catalytically Active

Intramolecular coordination of a linear copolymer precursor yields single chain nanoparticles (SCNP's) consisting of Pd(ii)-NHC2 crosslinks and showing a beneficial SCNP effect when used for the Suzuki coupling in water.

Synthesis of catalytically active gold clusters on the surface of Fe3O4@SiO2 nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 100614-100622 ◽  
Author(s):  
Paulino Alonso-Cristobal ◽  
M. Arturo Lopez-Quintela ◽  
Rafael Contreras-Caceres ◽  
Enrique Lopez-Cabarcos ◽  
Jorge Rubio-Retama ◽  
...  
Keyword(s):  
Sio2 Nanoparticles ◽  
Reducing Agents ◽  
Gold Clusters ◽  
Water Soluble ◽  
Mild Conditions ◽  
Catalytically Active ◽  
Novel Method

This work proposes a novel method to obtain catalytically active gold clusters by using the water-soluble 5,10,15,20-Tetrakis(4-trimethyl-ammonio-phenyl)porphyrin under mild conditions instead of using strong reducing agents.

Lipoprotein lipase uptake by the liver: localization, turnover, and metabolic role

1988 ◽  
Vol 254 (5) ◽  
pp. G711-G722 ◽  
Author(s):  
S. Vilaro ◽  
M. Llobera ◽  
G. Bengtsson-Olivecrona ◽  
T. Olivecrona
Keyword(s):  
Catalytic Activity ◽  
Lipoprotein Lipase ◽  
Active Form ◽  
Water Soluble ◽  
Hepatic Extraction ◽  
Metabolic Role ◽  
Rapid Formation ◽  
Catalytically Active ◽  
Limited Digestion ◽  
Rat Livers

We have studied the binding and metabolism of 125I-labeled bovine lipoprotein lipase (LPL) by use of isolated, perfused rat livers. Our data suggest the presence of two types of binding sites, i.e., heparin-sensitive sites that bind primarily the catalytically active form of the lipase and are present at the endothelium in all blood vessels and heparin-insensitive sites that bind both active and inactive forms and are present only within the sinusoids. Forty minutes after uptake by the liver, approximately 50% of the LPL had lost its catalytic activity or been degraded. Three processes were evident: 1) colchicine-sensitive degradation to acid-soluble products, 2) partial proteolysis to fragments similar to those formed by limited digestion with trypsin or plasmin, and 3) a conformational change leading to loss of catalytic activity. Exogenous LPL bound in the liver caused a dramatic increase in the utilization of a perfused triacylglycerol emulsion (Intralipid), with rapid formation of free fatty acids and water-soluble metabolites. When the liver was flushed with heparin, it lost its ability to utilize the fat emulsion. Measurement of the hepatic extraction showed that rat livers take up 100-200 mU endogenous LPL per hour.

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.

Ferritin Labeled Antibody Staining of Thin Sections

1969 ◽  
Vol 27 ◽  
pp. 420-421
Author(s):  
J. D. McLean ◽  
S. J. Singer
Keyword(s):  
Biological Material ◽  
Water Soluble ◽  
Thin Sections ◽  
Antibody Staining ◽  
Thin Sectioning ◽  
Ultrathin Sections

The successful application of ferritin labeled antibodies (F-A) to ultrathin sections of biological material has been hampered by two main difficulties. Firstly the normally used procedures for the preparation of material for thin sectioning often result in a loss of antigenicity. Secondly the polymers employed for embedding may non-specifically absorb the F-A. Our earlier use of cross-linked polyampholytes as embedding media partially overcame these problems. However the water-soluble monomers used for this method still extract many lipids from the material.

The Effect of Benzene on Bluegill Olfactory Lamellae

1985 ◽  
Vol 43 ◽  
pp. 574-575
Author(s):  
D.R. Mattie ◽  
J.W. Fisher
Keyword(s):  
Surface Morphology ◽  
Soluble Fraction ◽  
Lepomis Macrochirus ◽  
Sublethal Concentration ◽  
Water Soluble ◽  
Major Constituent ◽  
Jet Fuels ◽  
Aquatic Biota ◽  
Normal Surface ◽  
Cacodylate Buffer

Jet fuels such as JP-4 can be introduced into the environment and come in contact with aquatic biota in several ways. Studies in this laboratory have demonstrated JP-4 toxicity to fish. Benzene is the major constituent of the water soluble fraction of JP-4. The normal surface morphology of bluegill olfactory lamellae was examined in conjunction with electrophysiology experiments. There was no information regarding the ultrastructural and physiological responses of the olfactory epithelium of bluegills to acute benzene exposure.The purpose of this investigation was to determine the effects of benzene on the surface morphology of the nasal rosettes of the bluegill sunfish (Lepomis macrochirus). Bluegills were exposed to a sublethal concentration of 7.7±0.2ppm (+S.E.M.) benzene for five, ten or fourteen days. Nasal rosettes were fixed in 2.5% glutaraldehyde and 2.0% paraformaldehyde in 0.1M cacodylate buffer (pH 7.4) containing 1.25mM calcium chloride. Specimens were processed for scanning electron microscopy.

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