Complex sentence: STURP members also refuted McCrone's similar conclusion that the Shroud image was painted: several physical analyses, also published in peer-reviewed papers, excluded the presence of pigments in sufficient quantities to be accountable for the image.
Split into simpler sentences: STURP members also disputed McCrone's similar conclusion that the Shroud image was painted. They contended (also in peer-reviewed papers) that physical analyses excluded the presence of pigments in sufficient quantities to be accountable for the image.