Expansion of the Family of Molecular Nanoparticles of Cerium Dioxide and Their Catalytic Scavenging of Hydroxyl Radicals

2021 ◽  
Vol 60 (3) ◽  
pp. 1641-1653
Author(s):  
Kylie J. Mitchell ◽  
Justin L. Goodsell ◽  
Bradley Russell-Webster ◽  
Umar T. Twahir ◽  
Alexander Angerhofer ◽  
...  
Keyword(s):  
Hydroxyl Radicals ◽  
Cerium Dioxide ◽  
The Family ◽  
Molecular Nanoparticles

scholarly journals Antioxidant activity of cerium dioxide nanoparticles and nanorods in scavenging hydroxyl radicals

RSC Advances ◽  
2019 ◽  
Vol 9 (20) ◽  
pp. 11077-11081 ◽  
Author(s):  
Alexander Filippi ◽  
Fobang Liu ◽  
Jake Wilson ◽  
Steven Lelieveld ◽  
Karsten Korschelt ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Hydroxyl Radicals ◽  
Cerium Dioxide ◽  
Scavenging Activity ◽  
Physiological Conditions

Cerium dioxide nanoparticles and nanorods were found to exhibit much stronger scavenging activity than ·OH generation in quasi-physiological conditions.

Electrochemical Oxidation of Bromothymol Blue: Application to Textile Industrial Wastewater Treatment

2015 ◽  
Vol 18 (1) ◽  
Author(s):  
Malak Maamar ◽  
Imen Naimi ◽  
Yassine Mkadem ◽  
Nebil Souissi ◽  
Nizar Bellakhal
Keyword(s):  
Wastewater Treatment ◽  
Electrochemical Oxidation ◽  
Hydroxyl Radicals ◽  
Chemical Compound ◽  
Textile Industry ◽  
Industrial Wastewater ◽  
Bromothymol Blue ◽  
Fenton Process ◽  
Medium Ph ◽  
The Family

AbstractIn this study, electrochemical oxidation of Bromothymol blue (BTB) was studied in an aqueous medium (pH = 3) by electro-Fenton process (EFP). This chemical compound belongs to the family of sulfone phthalein, widely used for dyeing in the textile industry. EFP generates in a catalytic way hydroxyl radicals (•OH) which are powerful oxidant species (E

Molecular nanoparticles of cerium dioxide: structure-directing effect of halide ions

2020 ◽  
Vol 56 (40) ◽  
pp. 5382-5385
Author(s):  
Bradley Russell-Webster ◽  
Khalil A. Abboud ◽  
George Christou
Keyword(s):  
Cerium Dioxide ◽  
Halide Ions ◽  
Directing Effect ◽  
Molecular Nanoparticles

The use of halide ions in the synthesis of Ce/O clusters diverts the reaction to two halide-containing products: Cl− gives a new Ce20 nuclearity with both a high 1 : 1 Ce3+ : Ce4+ ratio and a high percentage of (100) facet coverage, whereas F− gives a known Ce6 nuclearity.

Truly Monodisperse ‘Molecular Nanoparticles’ of Cerium Dioxide of 2.4 nm dimensions: A {Ce100O167} Cluster

2021 ◽  
Author(s):  
George Christou ◽  
Bradley Russell-Webster ◽  
Javi Lopez-Nieto ◽  
Khalil A. Abboud
Keyword(s):  
Cerium Dioxide ◽  
Molecular Nanoparticles

Triassic sponges (Sphinctozoa) from Hells Canyon, Oregon

1988 ◽  
Vol 62 (03) ◽  
pp. 419-423 ◽  
Author(s):  
Baba Senowbari-Daryan ◽  
George D. Stanley
Keyword(s):  
Endemic Species ◽  
Upper Triassic ◽  
Island Arc ◽  
Tropical Island ◽  
The Family ◽  
Wallowa Terrane ◽  
Unique Condition ◽  
Hells Canyon

Two Upper Triassic sphinctozoan sponges of the family Sebargasiidae were recovered from silicified residues collected in Hells Canyon, Oregon. These sponges areAmblysiphonellacf.A. steinmanni(Haas), known from the Tethys region, andColospongia whalenin. sp., an endemic species. The latter sponge was placed in the superfamily Porata by Seilacher (1962). The presence of well-preserved cribrate plates in this sponge, in addition to pores of the chamber walls, is a unique condition never before reported in any porate sphinctozoans. Aporate counterparts known primarily from the Triassic Alps have similar cribrate plates but lack the pores in the chamber walls. The sponges from Hells Canyon are associated with abundant bivalves and corals of marked Tethyan affinities and come from a displaced terrane known as the Wallowa Terrane. It was a tropical island arc, suspected to have paleogeographic relationships with Wrangellia; however, these sponges have not yet been found in any other Cordilleran terrane.

Electron Microscopy of Mycoplasma Pneumoniae

1971 ◽  
Vol 29 ◽  
pp. 258-259 ◽  
Author(s):  
E. S. Boatman ◽  
G. E. Kenny
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Growth Phase ◽  
Hela Cells ◽  
Sulfonic Acid ◽  
Gamma Globulin ◽  
Horse Serum ◽  
Morphological Aspects ◽  
The Family

Information concerning the morphology and replication of organism of the family Mycoplasmataceae remains, despite over 70 years of study, highly controversial. Due to their small size observations by light microscopy have not been rewarding. Furthermore, not only are these organisms extremely pleomorphic but their morphology also changes according to growth phase. This study deals with the morphological aspects of M. pneumoniae strain 3546 in relation to growth, interaction with HeLa cells and possible mechanisms of replication.The organisms were grown aerobically at 37°C in a soy peptone yeast dialysate medium supplemented with 12% gamma-globulin free horse serum. The medium was buffered at pH 7.3 with TES [N-tris (hyroxymethyl) methyl-2-aminoethane sulfonic acid] at 10mM concentration. The inoculum, an actively growing culture, was filtered through a 0.5 μm polycarbonate “nuclepore” filter to prevent transfer of all but the smallest aggregates. Growth was assessed at specific periods by colony counts and 800 ml samples of organisms were fixed in situ with 2.5% glutaraldehyde for 3 hrs. at 4°C. Washed cells for sectioning were post-fixed in 0.8% OSO4 in veronal-acetate buffer pH 6.1 for 1 hr. at 21°C. HeLa cells were infected with a filtered inoculum of M. pneumoniae and incubated for 9 days in Leighton tubes with coverslips. The cells were then removed and processed for electron microscopy.

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