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https://www.readbyqxmd.com/read/28532046/inhibition-of-tnf-%C3%AE-sepsis-of-lipopolysaccharide-induction-using-nano-cerium-oxide-system
#1
Lingqing Ge, Qiaozhen Hu, Jing Chen, Mengrao Shi, Huiyun Yang, Guoji Zhu
Nowadays sepsis was one of the major threatening issues all over the globe which majorly causes death in high rate. To treat sepsis only few reports have been proposed with the help of anti-oxidants. This manuscript stated that the grape is rich in anti-oxidant, with the help of anti-oxidant rich grape extract Cerium oxide nanoparticles (CeO2 NPs) were synthesized eco-friendly. Further the synthesized CeO2 NPs subjected for various characterization studies which resulted in 37nm of size with agglomerated spherical shape particles...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531802/anti-inflammatory-and-antioxidant-effect-of-cerium-dioxide-nanoparticles-immobilized-on-the-surface-of-silica-nanoparticles-in-rat-experimental-pneumonia
#2
Z Serebrovska, R J Swanson, V Portnichenko, A Shysh, S Pavlovich, L Tumanovska, A Dorovskych, V Lysenko, V Tertykh, Y Bolbukh, V Dosenko
A massage with the potent counter-inflammatory material, cerium dioxide nanoparticles, is promising and the antioxidant properties of CeO2 are considered the main, if not the only, mechanism of this action. Nevertheless, the elimination of ceria nano-particles from the organism is very slow and there is a strong concern for toxic effect of ceria due to its accumulation. To overcome this problem, we engineered a combined material in which cerium nanoparticles were immobilized on the surface of silica nanoparticles (CeO2 NP), which is shown to be easily removed from an organism and could be used as carriers for nano-ceria...
May 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28530190/green-synthesis-of-ce2o3-nps-and-determination-of-its-antioxidant-activity
#3
Hayrunnisa Nadaroglu, Hicran Onem, Azize Alayli Gungor
In this study, the authors presented synthesis of ceria nanoparticles (NPs) by the bio-reduction method and their antioxidative activity. Aqueous extract of Euphorbia (Euphorbia amygdaloides) was used as reducing and stabilising agents. They used aqueous extract of Euphorbia (E. amygdaloides) as reducing and stabilising agent. Ultraviolet-visible (UV-vis) absorption spectroscopy was used to monitor the quantitative formation of ceria NPs. They also addressed the characteristics of the obtained ceria NPs using scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmitting electron microscope (TEM)...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28527632/cerium-oxide-nanoparticles-could-ameliorate-behavioral-and-neurochemical-impairments-in-6-hydroxydopamine-induced-parkinson-s-disease-in-rats
#4
Maha A Hegazy, Hala M Maklad, Doaa M Samy, Doaa A Abdelmonsif, Bassma M El Sabaa, Fatma Y Elnozahy
BACKGROUND: Cerium oxide nanoparticles (CeO2NPs) showed promising effects in neurodegenerative diseases including some animal models of Parkinsonism. However, the implication of CeO2NPs in 6-hydroxydopamine (6-OHDA) induced Parkinsonism remains to be investigated. AIM: This study was designed to assess whether CeO2NPs treatment could alleviate neurobehavioral and neurobiochemical deficits in 6-OHDA induced neurotoxicity in rats. MATERIAL AND METHODS: 50 rats received left intrastriatal (IS) injection of either saline (control, n = 10) or 6-OHDA (n = 40)...
May 17, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28527471/the-electron-shuffle-cerium-influences-samarium-4f-orbital-occupancy-in-heteronuclear-ce-sm-oxide-clusters
#5
Jared O Kafader, Josey E Topolski, Vicmarie Marrero-Colon, Srinivasan S Iyengar, Caroline Chick Jarrold
The anion photoelectron (PE) spectra along with supporting results of density functional theory (DFT) calculations on SmO(-), SmCeOy(-), and Sm2Oy(-) (y = 1, 2) are reported and compared to previous results on CeO(-) [M. Ray et al., J. Chem. Phys. 142, 064305 (2015)] and Ce2Oy(-) (y = 1, 2) [J. O. Kafader et al., J. Chem. Phys. 145, 154306 (2016)]. Similar to the results on CexOy(-) clusters, the PE spectra of SmO(-), SmCeOy(-), and Sm2Oy(-) (y = 1, 2) all exhibit electronic transitions to the neutral ground state at approximately 1 eV e(-)BE...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28527428/physicochemical-and-biological-interactions-between-cerium-oxide-nanoparticles-and-a-1-8-naphthalimide-derivative
#6
Gerardo Pulido-Reyes, Esperanza Martín, J L Gu Coronado, Francisco Leganes, Roberto Rosal, Francisca Fernández-Piñas
Cerium (Ce) oxide nanoparticles (CNPs) have attracted attention due to their high bioactivity and unique redox-chemistry. The oxygen vacancies at the surface of the nanoparticle explain the autocatalytic properties of CNPs in which the Ce(3+) atoms occupy the center of the oxygen vacancies surrounded by Ce(4+) atoms. Until now, CNPs have been associated with organic molecules at the synthesis stage to extend their applications or improve their stability. However, there is a lack of information regarding the post-synthesis interaction of CNPs and organic molecules that could enhance or induce new properties...
May 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28524602/elucidating-the-role-of-dissolution-in-ceo2-nanoparticle-plant-uptake-by-smart-radiolabeling
#7
Stefan Schymura, Thomas Fricke, Heike Hildebrand, Karsten Franke
The identification of major uptake pathways in plants is an important factor when evaluating the fate of manufactured nanoparticles in the environment and the associated risks. Using different radiolabeling techniques we were able to show a predominantly particulate uptake for CeO2 nanoparticles in contrast to a possible uptake in the form of ionic cerium.
May 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28514699/profiling-of-illicit-cocaine-seized-in-china-by-icp-ms-analysis-of-inorganic-elements
#8
Cuimei Liu, Zhendong Hua, Xin Meng
For the first time in China, the inorganic element profiling of cocaine specimens was performed at the National Narcotics Laboratory. An inductive coupled plasma-mass spectrometry (ICP-MS) method was developed and validated for simultaneous analysis of 26 inorganic elements, including sodium (Na), magnesium (Mg), aluminuim (Al), potassium (K), calcium (Ca), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), selenium (Se), molybdenum (Mo), silver (Ag), cadmium (Cd), antimony (Sb), barium (Ba), lanthanum (La), cerium (Ce), thallium (Tl), lead (Pb), thorium (Th), and uranium (U) in illicit cocaine samples...
April 29, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28513637/the-synergy-between-atomically-dispersed-pd-and-cerium-oxide-for-enhanced-catalytic-properties
#9
Xue Wang, Jiayu Chen, Jianxin Zeng, Qiuxiang Wang, Zejun Li, Ruixuan Qin, Changzheng Wu, Zhaoxiong Xie, Lansun Zheng
We report a photochemical synthesis of Pd/CeO2 catalysts with atomically dispersed Pd. Compared to atomically dispersed Pd/CeO2 with a cubic CeO2 support (Pd/CeO2-CP), atomically dispersed Pd/CeO2 with a truncated octahedral CeO2 support (Pd/CeO2-TOP) exhibited higher activity and selectivity, owing to the synergy between Pd atoms and the (111) surface of CeO2. When compared to Pd/CeO2 with Pd clusters and nanoparticles via chemical reduction, Pd/CeO2-TOP showed excellent activity with an enhancement factor of 324 in CO oxidation, as well as an activity enhancement by a factor of 344 in selective oxidation of benzyl alcohol...
May 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/28507690/a-bifunctional-cerium-phosphate-catalyst-for-chemoselective-acetalization
#10
Shunsuke Kanai, Ippei Nagahara, Yusuke Kita, Keigo Kamata, Michikazu Hara
Acid-base solid catalysts synthesized with structurally controlled uniform active sites can lead to unique catalysis. In this study, a CePO4 catalyst was synthesized using a hydrothermal method and found to exhibit high catalytic performance for the chemoselective acetalization of 5-hydroxymethylfurfural with alcohols, in sharp contrast to other homogeneous and heterogeneous acid and/or base catalysts. In the presence of CePO4, various combinations of carbonyl compounds and alcohols are efficiently converted into the corresponding acetal derivatives in good to excellent yields...
April 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28497981/express-measurement-of-cerium-and-gadolinium-in-solid-licl-kcl-salt-via-laser-induced-breakdown-spectroscopy-libs
#11
Ammon N Williams, Keith C Bryce, Supathorn Phongikaroon
No abstract text is available yet for this article.
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28488399/how-can-work-methanol-dehydrogenase-from-methylacidiphilum-fumariolicum-with-the-alien-ce-iii-ion-in-the-active-center-a-theoretical-study
#12
Tiziana Marino, Mario Prejanò, Nino Russo
Lanthanides are an example of nonbiogenic metal species and have been widely used in crystallographic and spectroscopic studies to probe Mg2+/Ca2+ binding sites in metalloproteins by replacing the native cofactor. Recently, a methanol dehydrogenase (MDH) enzyme containing cerium ion in the active site has been isolated from Methylacidiphilum Fumariolicum bacterium. With the aim to highlight as metal ion substitution can be reflected in catalytic mechanism, a comparative DFT study between Ca- and Ce-MDH has been undertaken...
May 10, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28485376/effect-of-adding-cerium-on-microstructure-and-morphology-of-ce-based-inclusions-formed-in-low-carbon-steel
#13
Z Adabavazeh, W S Hwang, Y H Su
Intra-granular Acicular Ferrite (IAF), as one of the most well-known desirable microstructure of ferrite with a chaotic crystallographic orientation, can not only refine the microstructure and retard the propagation of cleavage crack but also provide excellent combination of strength and toughness in steel. The effect of adding cerium on microstructure and controlling proper cerium-based inclusions in order to improve properties in low-carbon commercial steel (SS400) were investigated. The type of inclusions can be controlled by changing S/O ratio and Ce content...
May 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28481012/europium-doped-cerium-oxide-nanoparticles-limit-reactive-oxygen-species-formation-and-ameliorate-intestinal-ischemia-reperfusion-injury
#14
Ekaterina O Gubernatorova, Xiaobo Liu, Ali Othman, Wayne T Muraoka, Ekaterina P Koroleva, Silvana Andreescu, Alexei V Tumanov
Accumulating evidence suggests that ischemia-reperfusion-induced injury is associated with the formation of reactive oxygen species (ROS). This study demonstrates the therapeutic effectiveness of novel europium-doped cerium oxide nanoparticles (Eu-doped Ceria NPs) as ROS scavengers in a mouse model of intestinal ischemia-reperfusion-induced injury. An increased production of superoxide radicals is detected in the intestine throughout the ischemia stage and again after initiating reperfusion. These changes in superoxide radical formation are associated with the induction of inflammatory cytokines in the intestine...
May 8, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28480713/a-detailed-molecular-dynamics-simulation-and-experimental-investigation-on-the-interfacial-bonding-mechanism-of-an-epoxy-adhesive-on-carbon-steel-sheets-decorated-with-a-novel-cerium-lanthanum-nanofilm
#15
Ghasem Bahlakeh, Bahram Ramezanzadeh
The influences of steel surface treatment by a novel cerium-lanthanum (Ce-La) nanofilm on the adhesion mechanism of an epoxy adhesive were studied through experimental and modeling approaches. The surface morphology and microstructure of the film deposited were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The surface free energy and work of adhesion values were evaluated through contact angle analysis...
May 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28479942/charge-carrier-trapping-processes-in-re2o2s-re-la-gd-y-and-lu
#16
Hongde Luo, Adrie J J Bos, Pieter Dorenbos
Two different charge carrier trapping processes have been investigated in RE2O2S:Ln(3+) (RE = La, Gd, Y, and Lu; Ln = Ce, Pr, and Tb) and RE2O2S:M (M = Ti(4+) and Eu(3+)). Cerium, praseodymium and terbium act as recombination centers and hole trapping centers while host intrinsic defects provide the electron trap. The captured electrons released from the intrinsic defects recombine at Ce(4+), Pr(4+), or Tb(4+) via the conduction band. On the other hand, Ti(4+) and Eu(3+) act as recombination centers and electron trapping centers while host intrinsic defects act as hole trapping centers...
April 27, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/28458132/bio-sensing-applications-of-cerium-oxide-nanoparticles-advantages-and-disadvantages
#17
REVIEW
Fahimeh Charbgoo, Mohammad Ramezani, Majid Darroudi
Cerium oxide nanoparticles (CNPs) contain several properties such as catalytic activity, fluorescent quencher and electrochemical, high surface area, and oxygen transfer ability, which have attracted considerable attention in developing high-sensitive biosensors. CNPs can be used as a whole sensor or a part of recognition or transducer element. However, reports have shown that applying these nanoparticles in sensor design could remarkably enhance detection sensitivity. CNP's outstanding properties in biosensors which go from high catalytic activity and surface area to oxygen transfer and fluorescent quenching capabilities are also highlighted...
April 26, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28443879/pyrazolates-advance-cerium-chemistry-a-ce-iii-ce-iv-redox-equilibrium-with-benzoquinone
#18
Daniel Werner, Glen B Deacon, Peter C Junk, Reiner Anwander
Two stable cerium(iv) 3,5-dialkylpyrazolate complexes are presented, namely dimeric [Ce(Me2pz)4]2 (Me2pz = 3,5-dimethylpyrazolate) and monomeric Ce(tBu2pz)4 (tBu2pz = 3,5-di-tert-butylpyrazolate) along with their trivalent counterparts [Ce(Me2pz)3] and [Ce(tBu2pz)3]2. All complexes were obtained from protonolysis reactions employing the silylamide precursors Ce[N(SiHMe2)2]4 and Ce[N(SiMe3)2]3. Treatment of homoleptic Ce(IV) and Ce(III) Me2pz complexes with 1,4-hydroquinone (H2hq) or 1,4-benzoquinone (bq), respectively, ultimately gave the same trimetallic Ce(III) species via a cerium redox equilibrium...
May 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28442051/cerium-oxide-nanoparticles-ceo2-nps-improve-the-developmental-competence-of-in-vitro-matured-prepubertal-ovine-oocytes
#19
F Ariu, L Bogliolo, A Pinna, L Malfatti, P Innocenzi, L Falchi, D Bebbere, S Ledda
The present study investigated whether supplementation with different doses of cerium dioxide nanoparticles (CeO2 NPs) during in vitro maturation (IVM) of prepubertal ovine oocytes influenced their embryonic development in vitro. Cumulus-oocyte complexes derived from the ovaries of slaughtered prepubertal sheep underwent IVM with CeO2NPs (0, 44, 88 or 220µg mL(-1)). Matured oocytes were fertilised in vitro and zygotes were cultured for 7 days. The results demonstrated that CeO2NPs were internalised in the cumulus cells and not in the oocyte...
April 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28439996/energy-dispersive-spectroscopy-scanning-transmission-electron-microscope-observations-of-free-radical-production-in-human-polymorphonuclear-leukocytes-phagocytosing-non-opsonized-tannerella-forsythia
#20
Keiichi Moriguchi, Yoshiaki Hasegawa, Naoya Higuchi, Yukitaka Murakami, Fuminobu Yoshimura, Kazuhiko Nakata, Masaki Honda
We investigated the association between human polymorphonuclear leukocytes (PMNs) and non-opsonized Tannerella forsythia ATCC 43037 displaying a serum-resistant surface layer (S-layer). When PMNs were mixed with T. forsythia in suspension, the cells phagocytosed T. forsythia cells. Nitro blue tetrazolium (NBT) reduction, indicative of O2- production, was observed by light microscopy; cerium (Ce) perhydroxide deposition, indicative of H2 O2 production, was observed by electron microscopy. We examined the relationship between high-molecular-weight proteins of the S-layer and Ce reaction (for T...
April 24, 2017: Microscopy Research and Technique
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