Sook-Ying Ho

TL;DR: In this paper, the effect of molecular structure on the degradation of polypeptides by ionizing radiation was investigated using homopolymers of the amino acids gly, ala, val, phe and tyr, and the main reactions were scission of the entire side chain leading to its hydrogen adduct, fragmentation of the side chain, and fragmentation leading to a reduction in molecular weight and elimination of a segment of the chain.

TL;DR: In this paper, it is proposed that γ-irradiation of polypeptides causes ionisation to give the polymeric radical cation, which undergoes chain fragmentation to produce an amino cation and an alkyl radical.

TL;DR: The G(R·) values showed a good correlation with G(CO2) indicating that a common reaction may be involved in radical production and carbon dioxide formation, and a protective effect of the aromatic ring in N-acetyl-L-phenylalanine and in N -acetyl -L-tyrosine was indicated by the lower yields of volatile products.

TL;DR: In this paper, the volatile products from the γ irradiation of samples of poly(vinyl chloride) prepared under different conditions and reduced to the corresponding polyethylenes have been measured quantitatively and compared with those for low-and high-density polyethylene and copolymers of ethylene with small amounts of α-olefins.

TL;DR: In this paper, the authors measured the yields of polyolefins for irradiation of homopolymers of ethylene and copolymers with propene, 1-butene and 1-hexene at temperatures from 30 to 175°C.