Scanning electron micrography of hydrothermally synthesized kaolin and parent materials during synthesis reactions

1981 ◽  
Vol 28 (4) ◽  
pp. 265-276 ◽  
Author(s):  
O. Lahodny-Šarc ◽  
D. Dosen-Sver ◽  
W. D. Keller
Keyword(s):  
Parent Materials ◽  
Electron Micrography ◽  
Scanning Electron Micrography ◽  
Synthesis Reactions ◽  
Scanning Electron

scholarly journals The Effect of Tribomechanical Micronization and Activation on Rheological, Thermophysical, and Some Physical Properties of Tapioca Starch

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Zoran Herceg ◽  
Verica Batur ◽  
Anet Režek Jambrak ◽  
Tomislava Vukušić ◽  
Ines Gmajnički ◽  
...  
Keyword(s):  
Particle Size ◽  
Physical Properties ◽  
Laboratory Equipment ◽  
Tapioca Starch ◽  
Electron Micrography ◽  
Swelling Capacity ◽  
Before And After ◽  
Scanning Electron Micrography ◽  
Treatment Changes ◽  
Scanning Electron

The aim of this research was to investigate the effect of tribomechanical treatments on rheological, thermophysical, and some physical properties of tapioca starch. Samples of tapioca starch were treated using laboratory equipment for tribomechanical micronization and activation (TMA equipment). Before and after the TMA treatment, analysis of the particle size and particle size distribution was carried out, in addition to scanning electron micrography in tapioca starch. Scanning electron micrography showed that tribomechanical processing of tapioca starch resulted in breaking accumulations of starch granules in the form of granules. Pasting parameters have shown that maximal viscosities of model starch suspension have been decreasing after tribomechanical treatment. On the basis of gelatinization curves, it can be concluded that there are changes in the gelatinization point after treatment, and there is decrease in enthalpy of gelatinization for model suspension. After tribomechanical treatment, changes in physical properties of starch suspensions were determined, as well as specific swelling capacity, solubility index, and turbidity of tapioca starch suspensions.

On Monocarpus (Monocarpaceae, Marchantiopsida), an isolated salt-pan complex thalloid liverwort

2015 ◽  
Vol 28 (3) ◽  
pp. 137 ◽  
Author(s):  
Laura L. Forrest ◽  
David G. Long ◽  
D. Christine Cargill ◽  
Michelle L. Hart ◽  
Josephine Milne ◽  
...  
Keyword(s):  
South Africa ◽  
Line Drawing ◽  
Molecular Data ◽  
Morphological Features ◽  
Electron Micrography ◽  
Phylogenetic Placement ◽  
Salt Pan ◽  
Scanning Electron Micrography ◽  
Scanning Electron

The phylogenetic placement of Monocarpus sphaerocarpus D.J.Carr (Monocarpaceae), a member of the complex thalloid liverworts with highly specialised morphology, presumably related to its saltpan habitat, has been determined on the basis of molecular data. Within the complex thalloid liverworts, Monocarpus resolves as sister to the Sphaerocarpales clade. A new line drawing of Monocarpus is provided, as are the first colour photographs of living plants. Detailed ornamentation of the spores of Monocarpus collections from Australia and South Africa, as revealed by scanning electron micrography, is reported, and some of the morphological features that unite and separate Monocarpus and the Sphaerocarpales s.str. are discussed.

Cinematographical study of cell migration in the opened gastrula of Ambystoma mexicanum

Development ◽  
1978 ◽  
Vol 44 (1) ◽  
pp. 71-80
Author(s):  
H. Y. Kubota ◽  
A. J. Durston
Keyword(s):  
Cell Migration ◽  
Cell Body ◽  
Time Lapse ◽  
Ambystoma Mexicanum ◽  
Scanning Electron Micrographs ◽  
Neighbouring Cell ◽  
Posterior Process ◽  
Scanning Electron Micrography ◽  
Marginal Cells ◽  
Scanning Electron

The migration of inner marginal cells was studied in the Ambystoma gastrula, using scanning electron micrography and time-lapse cinemicrography. Scanning electron micrographs of gastrulae which were fixed while intact revealed that the migrating cells have flattened lamellipodia at their anterior end and a rounded cell body, which can sometimes be seen to be attached to a neighbouring cell by a slender posterior process. Films of opened gastrulae showed actively moving cells, with the same features described above. Details of their movements are reported and discussed in relation to the mechanism of gastrulation.

Effects of Homogenization Treatment on Dispersoid Characteristics and Recrystallization Behavior in an Al-Zn-Mg-Cu-Zr Alloy

2016 ◽  
Vol 877 ◽  
pp. 153-158
Author(s):  
Xiang Xiao ◽  
Cheng Liu ◽  
Jian Zhao ◽  
Wei Li
Keyword(s):  
Heating Rate ◽  
High Heating Rate ◽  
Recrystallization Behavior ◽  
Homogenization Treatment ◽  
Electron Micrography ◽  
Transmission Electron ◽  
Scanning Electron Micrography ◽  
Holding Temperature ◽  
Zr Alloy ◽  
Comprehensive Study

In the present research, a comprehensive study on the effect of the homogenization treatment on the characteristics of dispersoid and recrystallization behavior in an Al-Zn-Mg-Cu-Zr alloy has been conducted by means of optical micrography, scanning electron micrography and transmission electron micrography. The influence of three process parameters of the homogenization treatment, first stage holding temperature, holding time and heating rate, on the dispersoid characteristics has been throughly studied. The result shows that holding at 400°C for sufficient time is highly beneficial for obtaining fine and uniformly distributed Al3Zr particles. Compared with the high heating rate treatment, the slow one apparently leads to significantly smaller Al3Zr dispersoids, the dimension of the dispersoids decreases from 35 nm to 22 nm, and the number density of Al3Zr particle in the center of the grains increases from 13/μm2 to 35/μm2. The percentage of recrystallized grains of the alloy is found to be affected by dispersoid distribution.

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