The air interface
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AP1 (GEQGALAQFGEWL) was shown by theoretical analysis to be an anionic oblique-orientateda-helix former. The peptide exhibited a mono-layer surface area of 1.42 nm 2 , implying possession of a-helical structure at an air⁄water interface, and Fourier transform infrared spectroscopy (FTIR) showed the peptide to be a-helical (100%) in the presence of vesi-cle mimics of Escherichia colimembranes.
12p 
inspiron33
25-03-2013
41
3
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TOWARDS ‘ALL IP’ AND SOME CONCLUDING REMARKS This concluding chapter provides first an introduction to some of the planned release 5 enhancements to UMTS and the GPRS/EDGE RAN (GERAN). These can be seen as the first step towards ‘all IP’. The challenges when having to deliver real-time IP services over an air interface, in particular voice over IP services, are summarised and possible solutions to achieve spectrum efficiencies similar to those of optimised cellular voice services are outlined.
18p huggoo
20-08-2010
93
13
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