A simple set-up for black lipid membrane experiments

1970 ◽  
Vol 47 (6) ◽  
pp. 469 ◽  
Author(s):  
William A. Huemoeller ◽  
H. T. Tien
Keyword(s):  
Lipid Membrane ◽  
Black Lipid Membrane ◽  
Simple Set ◽  
Set Up

scholarly journals Seasonal variations and north–south asymmetries in polar wind outflow due to solar illumination

2016 ◽  
Vol 34 (11) ◽  
pp. 961-974 ◽  
Author(s):  
Lukas Maes ◽  
Romain Maggiolo ◽  
Johan De Keyser
Keyword(s):  
Seasonal Variations ◽  
Solar Zenith Angle ◽  
The Sun ◽  
Polar Ionosphere ◽  
Polar Cap ◽  
Polar Wind ◽  
Simple Set ◽  
The Earth ◽  
Rotation Of The Earth ◽  
Set Up

Abstract. The cold ions (energy less than several tens of electronvolts) flowing out from the polar ionosphere, called the polar wind, are an important source of plasma for the magnetosphere. The main source of energy driving the polar wind is solar illumination, which therefore has a large influence on the outflow. Observations have shown that solar illumination creates roughly two distinct regimes where the outflow from a sunlit ionosphere is higher than that from a dark one. The transition between both regimes is at a solar zenith angle larger than 90°. The rotation of the Earth and its orbit around the Sun causes the magnetic polar cap to move into and out of the sunlight. In this paper we use a simple set-up to study qualitatively the effects of these variations in solar illumination of the polar cap on the ion flux from the whole polar cap. We find that this flux exhibits diurnal and seasonal variations even when combining the flux from both hemispheres. In addition there are asymmetries between the outflows from the Northern Hemisphere and the Southern Hemisphere.

scholarly journals The Main (Glyco) Phospholipid (MPL) of Thermoplasma acidophilum

2019 ◽  
Vol 20 (20) ◽  
pp. 5217
Author(s):  
Hans-Joachim Freisleben
Keyword(s):  
Lipid Membrane ◽  
Micrococcus Luteus ◽  
Atp Synthesis ◽  
Scanning Calorimetry ◽  
Thermoplasma Acidophilum ◽  
Black Lipid Membrane ◽  
Langmuir Blodgett ◽  
Hydrophobic Peptides ◽  
Laboratory Results ◽  
Review Reports

The main phospholipid (MPL) of Thermoplasma acidophilum DSM 1728 was isolated, purified and physico-chemically characterized by differential scanning calorimetry (DSC)/differential thermal analysis (DTA) for its thermotropic behavior, alone and in mixtures with other lipids, cholesterol, hydrophobic peptides and pore-forming ionophores. Model membranes from MPL were investigated; black lipid membrane, Langmuir-Blodgett monolayer, and liposomes. Laboratory results were compared to computer simulation. MPL forms stable and resistant liposomes with highly proton-impermeable membrane and mixes at certain degree with common bilayer-forming lipids. Monomeric bacteriorhodopsin and ATP synthase from Micrococcus luteus were co-reconstituted and light-driven ATP synthesis measured. This review reports about almost four decades of research on Thermoplasma membrane and its MPL as well as transfer of this research to Thermoplasma species recently isolated from Indonesian volcanoes.

The Art of Teaching: A Technique for Solving Simple “Set Up” Equations in One Unknown

1946 ◽  
Vol 39 (1) ◽  
pp. 35-38
Author(s):  
May L. Wilt
Keyword(s):  
First Year ◽  
Teaching Techniques ◽  
Simple Set ◽  
Starting Point ◽  
Ability Groups ◽  
Good Starting Point ◽  
Art Of Teaching ◽  
Set Up ◽  
One Year

No longer can teachers of mathematics be satisfied with the type of teaching that produces uncertain results. The first year of algebra is a good starting point for developing teaching techniques. Most children, who have had one year of algebra, can solve simple “set up” equations in one unknown if they are directed “what to do next.” They should be able to know “what to do next.” Very bright children find out for themselves, but the average and slower ability groups must be helped to develop a technique that will produce certainty and accuracy in results.

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