Size-Dependent Reactivity of Rhodium Cluster Anions toward Methane

2019 ◽  
Vol 123 (27) ◽  
pp. 17035-17042 ◽  
Author(s):  
Yi Ren ◽  
Yuan Yang ◽  
Yan-Xia Zhao ◽  
Sheng-Gui He
Keyword(s):  
Cluster Anions ◽  
Size Dependent

Size-Dependent Association of Cobalt Deuteride Cluster Anions Co3Dn− (n = 0–4) with Dinitrogen

2019 ◽  
Vol 30 (10) ◽  
pp. 1956-1963 ◽  
Author(s):  
Li-Hui Mou ◽  
Zi-Yu Li ◽  
Qing-Yu Liu ◽  
Sheng-Gui He
Keyword(s):  
Cluster Anions ◽  
Size Dependent

Strongly cluster size dependent reaction behavior of CO with O2 on free silver cluster anions

2004 ◽  
Vol 120 (5) ◽  
pp. 2078-2081 ◽  
Author(s):  
Liana D. Socaciu ◽  
Jan Hagen ◽  
Jérôme Le Roux ◽  
Denisia Popolan ◽  
Thorsten M. Bernhardt ◽  
...  
Keyword(s):  
Cluster Size ◽  
Silver Cluster ◽  
Cluster Anions ◽  
Reaction Behavior ◽  
Size Dependent

Size-Dependent Polymorphism in Aluminum Carbide Cluster Anions AlnC2–: Formation of Acetylide-Containing Structures

2018 ◽  
Vol 122 (15) ◽  
pp. 8341-8347 ◽  
Author(s):  
Kazuyuki Tsuruoka ◽  
Kiichirou Koyasu ◽  
Shinichi Hirabayashi ◽  
Masahiko Ichihashi ◽  
Tatsuya Tsukuda
Keyword(s):  
Aluminum Carbide ◽  
Cluster Anions ◽  
Size Dependent ◽  
Carbide Cluster

Production and STEM examination of controlled-size silver clusters

1983 ◽  
Vol 41 ◽  
pp. 338-339
Author(s):  
M. A. Listvan ◽  
R. P. Andres
Keyword(s):  
Cluster Size ◽  
Metal Clusters ◽  
Experimental Parameter ◽  
Carbon Films ◽  
Metal Species ◽  
Silver Clusters ◽  
Free Jet ◽  
Size Dependent ◽  
Cluster Properties ◽  
Controllable Size

Knowledge of the function and structure of small metal clusters is one goal of research in catalysis. One important experimental parameter is cluster size. Ideally, one would like to produce metal clusters of regulated size in order to characterize size-dependent cluster properties.A source has been developed which is capable of producing microscopic metal clusters of controllable size (in the range 5-500 atoms) This source, the Multiple Expansion Cluster Source, with a Free Jet Deceleration Filter (MECS/FJDF) operates as follows. The bulk metal is heated in an oven to give controlled concentrations of monomer and dimer which were expanded sonically. These metal species were quenched and condensed in He and filtered to produce areosol particles of a controlled size as verified by mass spectrometer measurements. The clusters were caught on pre-mounted, clean carbon films. The grids were then transferred in air for microscopic examination. MECS/FJDF was used to produce two different sizes of silver clusters for this study: nominally Ag6 and Ag50.

Transfer Technique for Electron Microscopy of Membrance Filter Samples

1974 ◽  
Vol 32 ◽  
pp. 554-555
Author(s):  
Lawrence W. Ortiz ◽  
Bonnie L. Isom
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Pore Size ◽  
Membrane Filters ◽  
Size Dependent

A procedure is described for the quantitative transfer of fibers and particulates collected on membrane filters to electron microscope (EM) grids. Various Millipore MF filters (Millipore AA, HA, GS, and VM; 0.8, 0.45, 0.22 and 0.05 μm mean pore size) have been used with success. Observed particle losses have not been size dependent and have not exceeded 10%. With fibers (glass or asbestos) as the collected media this observed loss is approximately 3%.

Spindle scaling mechanisms

2020 ◽  
Vol 64 (2) ◽  
pp. 383-396
Author(s):  
Lara K. Krüger ◽  
Phong T. Tran
Keyword(s):  
Cell Size ◽  
Spindle Assembly ◽  
Dependent Manner ◽  
Post Translational Modification ◽  
Size Dependent ◽  
A Cell ◽  
Chromosome Separation ◽  
Spindle Elongation ◽  
Protein Gradients ◽  
Spindle Structure

Abstract The mitotic spindle robustly scales with cell size in a plethora of different organisms. During development and throughout evolution, the spindle adjusts to cell size in metazoans and yeast in order to ensure faithful chromosome separation. Spindle adjustment to cell size occurs by the scaling of spindle length, spindle shape and the velocity of spindle assembly and elongation. Different mechanisms, depending on spindle structure and organism, account for these scaling relationships. The limited availability of critical spindle components, protein gradients, sequestration of spindle components, or post-translational modification and differential expression levels have been implicated in the regulation of spindle length and the spindle assembly/elongation velocity in a cell size-dependent manner. In this review, we will discuss the phenomenon and mechanisms of spindle length, spindle shape and spindle elongation velocity scaling with cell size.

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