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Amphiphilic peptides have a hydrophilic head group and a hydrophobic alkyl tail. The hydrophobic tail helps in aligning the head group to form various secondary, supersecondary, and tertiary conformations. Very thin cylindrical nanofibers (<10-nm diameter) with high aspect ratio, or nanobelts, are achieved by a self-assembly of peptide amphiphiles (PAs) under specific solution conditions (pH, ionic strength, and temperature). The 1D nanostructures can interact further among one another, making a 3D network. These 3D network structures make a hydrogel in water. Hydrophobic and electrostatic interactions are the dominating forces in the self-assembly of amphiphilic peptides. The amphiphilic cyclic peptide composed of two b-glucosamino acids and one trans-2-aminocyclohexylcarboxylic acid in formic acid and water (7/3 v/v) makes self-assembled rods and fibers of different dimensions depending upon the solution concentration. A concentration of 1.1 105 M provided a rod-shaped assembly of c. 5-nm diameter, which corresponds to a nine-columnar (3 triple bundle) structure (Fig. 4.7A). By increasing the peptide concentration to 1.1 104 M, a uniform fibrous assembly of c. 15 nm in
Single frame of a 16mm project shot on a light leaky bolex with a shifty registration pin.
Some outtakes.
Tenth Assembly - Winnipeg July 21 - July 31st 2003.
Youth delegates and stewards portrayed the exclusion that Ruth might have felt as they explored the day’s theme, "Reorder power."
LWF Asia Pre-Assembly, Bangkok, Thailand, 15-19 August 2016. Closing worship. Photo: LWF/Arni Danielsson.
The rear view of the assembled Stormlord. The two autocannon's need to be tidied up and secured in place. The fuel barrels (which are tiny for such a large tank) have had circles of thin plasti-card glued to cover the hideous join line.
Jim Sorenson
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LWF Asia Pre-Assembly, Bangkok, Thailand, 15-19 August 2016. Morning worship, 19 August. Photo: LWF/Arni Danielsson.