Fe-doping induced morphological changes, oxygen vacancies and Ce3+–Ce3+ pairs in CeO2 for promoting electrocatalytic nitrogen fixation

2020 ◽  
Vol 8 (12) ◽  
pp. 5865-5873 ◽  
Author(s):  
Ke Chu ◽  
Yong-hua Cheng ◽  
Qing-qing Li ◽  
Ya-ping Liu ◽  
Ye Tian
Keyword(s):  
Nitrogen Fixation ◽  
Morphological Change ◽  
Oxygen Vacancies ◽  
Morphological Changes ◽  
Fe Doping ◽  
Synergetic Effects

Fe-doping induced synergetic effects, including the morphological change of crystalline CeO2 to partial-amorphous nanosheets, enriched O-vacancies and active Ce3+–Ce3+ pairs, were all responsible for the significantly enhanced NRR activity of Fe-CeO2.

Visible-Light-Driven Nitrogen Fixation Catalyzed by Bi5O7Br Nanostructures: Enhanced Performance by Oxygen Vacancies

2020 ◽  
Vol 142 (28) ◽  
pp. 12430-12439 ◽  
Author(s):  
Peishen Li ◽  
Ziang Zhou ◽  
Qiang Wang ◽  
Ming Guo ◽  
Shaowei Chen ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Visible Light ◽  
Oxygen Vacancies ◽  
Visible Light Driven

Analogical Modeling and morphological change: the case of the adjectival negative prefix in English

2005 ◽  
Vol 9 (2) ◽  
pp. 333-357 ◽  
Author(s):  
DON CHAPMAN ◽  
ROYAL SKOUSEN
Keyword(s):  
Early Modern ◽  
Morphological Change ◽  
Morphological Changes ◽  
Unified Model ◽  
Subsequent Time ◽  
Early Modern English ◽  
Time Period

This article examines the usefulness of Skousen's Analogical Modeling (AM) for explaining morphological change. In contrast to previous accounts of analogy, AM constitutes a general unified model of language that accounts for both sporadic and systematic changes. AM also provides explicit constraints on analogy that allow explanation of how morphological changes begin, which forms most likely serve as patterns for analogy, and which forms are most likely to change.AM is then tested on the case of the adjectival negative prefix in English (in-, un-, dis-, etc.), using the Middle and Early Modern English portions of the Helsinki corpus as a basis for prediction. AM was given the task of using forms containing negative prefixes for one time period to predict the prefixes that adjectives would take in the subsequent time period. For each of the roughly seventy-year periods in the corpus, AM was able to predict valid prefixes about 90 percent of the time.

Plasma-engineered NiO nanosheets with enriched oxygen vacancies for enhanced electrocatalytic nitrogen fixation

2020 ◽  
Vol 7 (2) ◽  
pp. 455-463 ◽  
Author(s):  
Yu-biao Li ◽  
Ya-ping Liu ◽  
Jing Wang ◽  
Ya-li Guo ◽  
Ke Chu
Keyword(s):  
Nitrogen Fixation ◽  
Oxygen Vacancies ◽  
Plasma Technique ◽  
Nio Nanosheets

Plasma technique can readily create the enriched oxygen vacancies which enable the NiO to be an active and durable catalyst for electrocatalytic fixation of N2 to NH3.

scholarly journals Morphological and Optical Properties of Cobalt Ion-Modified ZnO Nanowires

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 614
Author(s):  
Seok Cheol Choi ◽  
Do Kyung Lee ◽  
Sang Ho Sohn
Keyword(s):  
Optical Properties ◽  
Hydrothermal Synthesis ◽  
Oxygen Vacancies ◽  
Morphological Changes ◽  
Zno Nanowires ◽  
Oxide Cluster ◽  
Co Doping ◽  
Co Concentration ◽  
Acetate Hydrate ◽  
Low Levels

In this study, we prepared cobalt (Co) ion-modified ZnO nanowires using hydrothermal synthesis with zinc acetate dehydrate and Co (II) acetate hydrate precursors in ethanol solutions. Their morphological and optical properties were investigated with varying Co precursor concentration. The morphological changes of the ZnO nanowires depended positively on the concentration of the Co precursor. The ZnO nanowires showed modified crystal orientations and nanostructure shapes depending on the Co concentration in the solutions. Variations in the optical properties of the Co ion-modified ZnO nanowires could be explained by the interaction of the Co ions with the band electrons, oxygen vacancies, and zinc interstitials. The overall growth and characteristics of ZnO nanowires synthesized in solutions containing low levels of Co ions were related to Co doping into the ZnO bulks. In solutions containing high levels of Co ions, these were additionally related to the Co oxide cluster.

Fe-Doped BiOCl Nanosheets with Light-Switchable Oxygen Vacancies for Photocatalytic Nitrogen Fixation

2019 ◽  
Vol 2 (12) ◽  
pp. 8394-8398 ◽  
Author(s):  
Nan Zhang ◽  
Leigang Li ◽  
Qi Shao ◽  
Ting Zhu ◽  
Xiaoqing Huang ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Oxygen Vacancies

scholarly journals Quantifying the Rate, Degree, and Heterogeneity of Morphological Change during an Epithelial to Mesenchymal Transition Using Digital Holographic Cytometry

2020 ◽  
Vol 10 (14) ◽  
pp. 4726
Author(s):  
Sofia Kamlund ◽  
Birgit Janicke ◽  
Kersti Alm ◽  
Robert L. Judson-Torres ◽  
Stina Oredsson
Keyword(s):  
Cell Line ◽  
Morphological Change ◽  
Efficient Method ◽  
Mammalian Cells ◽  
Epithelial To Mesenchymal Transition ◽  
Morphological Changes ◽  
Cell Populations ◽  
Label Free ◽  
Mesenchymal Transition ◽  
Quantitative Changes

Cells in complex organisms can transition between epithelial and mesenchymal phenotypes during both normal and malignant physiological events. These two phenotypes are not binary, but rather describe a spectrum of cell states along an axis. Mammalian cells can undergo dynamic and heterogenous bidirectional interconversions along the epithelial–mesenchymal phenotypic (EMP) spectrum, and such transitions are marked by morphological change. Here, we exploit digital holographic cytometry (DHC) to develop a tractable method for monitoring the degree, kinetics, and heterogeneity of epithelial and mesenchymal phenotypes in adherent mammalian cell populations. First, we demonstrate that the epithelial and mesenchymal states of the same cell line present distinct DHC-derived morphological features. Second, we identify quantitative changes in these features that occur hours after induction of the epithelial to mesenchymal transition (EMT). We apply this approach to achieve label-free tracking of the degree and the rate of EMP transitions. We conclude that DHC is an efficient method to investigate morphological changes during transitions between epithelial and mesenchymal states.

scholarly journals Morphological Change in Pseudomonas aeruginosafollowing Antibiotic Treatment of Experimental Infection in Mice and Its Relation to Susceptibility to Phagocytosis and to Release of Endotoxin

2000 ◽  
Vol 44 (1) ◽  
pp. 205-206 ◽  
Author(s):  
Takashi Yokochi ◽  
Kayou Narita ◽  
Akiko Morikawa ◽  
Kazuko Takahashi ◽  
Yutaka Kato ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Morphological Change ◽  
Antibiotic Treatment ◽  
Experimental Infection ◽  
Morphological Changes ◽  
Intraperitoneal Administration ◽  
Endotoxin Level ◽  
Peritoneal Cells ◽  
The Relationship ◽  
Plasma Endotoxin Level

ABSTRACT The relationship between morphological changes in Pseudomonas aeruginosa following antibiotic treatment of experimental infection in mice, susceptibility to phagocytosis, and release of endotoxin was studied. The intraperitoneal administration of P. aeruginosa with imipenem or ceftazidime into mice induced morphological changes in the cells 2 h after injection. Round P. aeruginosa cells with imipenem treatment became susceptible to phagocytosis by peritoneal cells, whereas long filamentous cells with ceftazidime treatment were hardly phagocytized by peritoneal cells. The morphological changes also affected the plasma endotoxin level in the circulation.

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