698 research outputs found
The genetic code Via Godel encoding
The genetic code structure into distinct multiplet-classes as well as the
numeric degeneracies of the latter are revealed by a two-step process. First,
an empirical inventory of the degeneracies (of the shuffled multiplets) in two
specific equal moieties of the experimental genetic code table is made and
transcribed in the form of a sequence of integers. Second, a Godel Encoding
procedure is applied to the latter sequence delivering, as an output, a Godel
Number the digits of which, from the decimal representation, could remarkably
describe the amino acids and the stops and allow us also to compute the exact
degeneracies, class by class. The standard and the vertebrate mitochondrial
genetic codes are considered and their multiplet structure is fully
established
Photooxidation of Polymeric-inorganic nanocomposites: Chemical, Thermal Stability and Fire Retardancy Investigations
Nanocomposites of polypropylene-graft-maleic anhydride/clay and polypropylene/clay were prepared by melt blending using two different approaches. X-Ray diffraction results showed an intercalated structure. Samples of nanocomposites were exposed to UV light under atmospheric oxygen and their photo-oxidative stability was studied using FTIR and UV spectroscopy. The consequences of this photo-oxidation on the thermal stability and fire retardant performance of the nanocomposites were also addressed from thermogravimetry analysis and Cone calorimetry
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