scholarly journals Variation in Molecular Species of Core Lipids from the Order Thermoplasmales Strains Depends on the Growth Temperature

2004 ◽  
Vol 53 (8) ◽  
pp. 399-404 ◽  
Author(s):  
Ikuko UDA ◽  
Akihiko SUGAI ◽  
Yuko H. ITOH ◽  
Toshihiro ITOH
Keyword(s):  
Molecular Species ◽  
Growth Temperature

Variation in molecular species of polar lipids from Thermoplasma acidophilum depends on growth temperature

Lipids ◽  
2001 ◽  
Vol 36 (1) ◽  
pp. 103-105 ◽  
Author(s):  
Ikuko Uda ◽  
Akihiko Sugai ◽  
Yuko H. Itoh ◽  
Toshihiro Itoh
Keyword(s):  
Molecular Species ◽  
Growth Temperature ◽  
Polar Lipids ◽  
Thermoplasma Acidophilum

Structure and Orientation of As Precipitates in LT-MBE Grown GaAs

1991 ◽  
Vol 49 ◽  
pp. 900-901 ◽  
Author(s):  
Alain Claverie ◽  
Zuzanna Liliental-Weber
Keyword(s):  
Transport Properties ◽  
Layer Thickness ◽  
Growth Temperature ◽  
Low Temperatures ◽  
Lattice Parameter ◽  
Crystalline Quality ◽  
Insulating Properties ◽  
Lt Gaas

GaAs layers grown by MBE at low temperatures (in the 200°C range, LT-GaAs) have been reported to have very interesting electronic and transport properties. Previous studies have shown that, before annealing, the crystalline quality of the layers is related to the growth temperature. Lowering the temperature or increasing the layer thickness generally results in some columnar polycrystalline growth. For the best “temperature-thickness” combinations, the layers may be very As rich (up to 1.25%) resulting in an up to 0.15% increase of the lattice parameter, consistent with the excess As. Only after annealing are the technologically important semi-insulating properties of these layers observed. When annealed in As atmosphere at about 600°C a decrease of the lattice parameter to the substrate value is observed. TEM studies show formation of precipitates which are supposed to be As related since the average As concentration remains almost unchanged upon annealing.

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