Growth-front hopping via stress-induced nucleation illustrated for the crystallization of Ba1-xSrxZn2Si2O7 from a glass in the BaO-SrO-ZnO-SiO2 system

Morphological features of montmorillonite aggregates in a large number of samples suggest that they may be formed by a dendritic crystal growth mechanism (i.e., tree-like growth by branching of a growth front).

Download Full-text

COLONY OF THE FUNGUS Aspergillus oryzae AND SELF-AFFINE FRACTAL GEOMETRY OF GROWTH FRONTS

Fractals ◽

10.1142/s0218348x93000046 ◽

1993 ◽

Vol 01 (01) ◽

pp. 11-19 ◽

Cited By ~ 20

Author(s):

SHU MATSUURA ◽

SASUKE MIYAZIMA

Keyword(s):

Aspergillus Oryzae ◽

Environmental Conditions ◽

Fractal Geometry ◽

Nutrient Concentration ◽

Incubation Temperature ◽

Characteristic Exponent ◽

Growth Front ◽

Favorable Condition ◽

The Self ◽

The Mean

A variety of colony shapes of the fungus Aspergillus oryzae under varying environmental conditions such as the nutrient concentration, medium stiffness and incubation temperature are obtained, ranging from a homogeneous Eden-like to a ramified DLA-like pattern. The roughness σ(l, h) of the growth front of the band-shaped colony, where h is the mean front height within l of the horizontal range, satisfies the self-affine fractal relation under favorable environmental conditions. In the most favorable condition of our experiments, its characteristic exponent is found to be a little larger than that of the 2-dimensional Eden model.

Download Full-text

Preparation and In Vitro Behavior of Bioactive Glasses from Bovine Waste Resource

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.309-311.329 ◽

2006 ◽

Vol 309-311 ◽

pp. 329-332

Author(s):

S.H. Ahn ◽

Yong Nam Kim ◽

Hyun Gyu Shin ◽

Hee Soo Lee ◽

Jong Hee Hwang ◽

...

Keyword(s):

High Purity ◽

Alternative Strategy ◽

Biological Resource ◽

Bioactive Glasses ◽

Sio2 System ◽

Functional Applications

Preparation of bioactive glasses was attempted utilizing waste bovine as raw resource. Bioactive and biodegradable batch compositions in the Na2O-CaO-SiO2 system were included with calcined bovine, whose phase was high-purity oxy-hydroxyapatite. Bovine inclusion as large as 40 mass% was shown to present highly bioactive glasses; bovine in the bioactive and biodegradable compositions presented glasses with controlled bioactivity and biodegradability, respectively. These indicate not only a plenty biological resource of bio-interactive materials, but also an alternative strategy for bioactive glasses with multi-functional applications.

Download Full-text

High temperature mass spectrometric study of the vaporization behaviour of SiC–SiO2 system

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2007.01.174 ◽

2008 ◽

Vol 452 (1) ◽

pp. 85-88 ◽

Cited By ~ 7

Author(s):

Gabriele Honstein ◽

Christian Chatillon ◽

Francis Baillet

Keyword(s):

High Temperature ◽

Mass Spectrometric Study ◽

Mass Spectrometric ◽

Spectrometric Study ◽

Sio2 System ◽

Vaporization Behaviour

Download Full-text

Role of Surface Reconstruction and External Ion Beam in the Growth Kinetics of III-V Molecular Beam Epitaxy

MRS Proceedings ◽

10.1557/proc-94-83 ◽

1987 ◽

Vol 94 ◽

Cited By ~ 10

Author(s):

S. B. Ogale ◽

M. Thomsen ◽

A. Madhukar

Keyword(s):

Molecular Beam Epitaxy ◽

Low Temperature ◽

Surface Reconstruction ◽

Molecular Beam ◽

Ion Beam ◽

Growth Front ◽

Kinetic Rates ◽

Kinetics Of ◽

Low Temperature Epitaxy

ABSTRACTComputer simulations of III-V molecular beam epitaxy (MBE) show that surface reconstruction induced modulation of kinetic rates could give rise to ordering in alloys. Results are also presented for the possible influence of an external ion beam in achieving low temperature epitaxy as well as smoother growth front under usual conditions.

Download Full-text