BLOOD AS A BINDING MEDIUM IN A CHUMASH INDIAN PIGMENT CAKE

Dans le cadre d'une etude des pigments utilisees par les indiens Chumash, quelques pigments noirs ont ete examines. Une croute de pigment a ete caracterisee comme de la suie par microscopie a rayons polarises, et la microscopie infrarouge Fourier montre que le liant est de nature proteinique. L'examen du pigment, au moyen de la chromatographie en phase gazeuse et de la spectrometrie de masse, montre la presence d'une suite caracteristique d'acides amines, proportionellement similaires au sang. L'identification sanguine est confirmee par l'analyse immunologique. Il est demontre que le liant est un melange de sang humain et animal, l'animal etant l'antilope a corne pointue. Il s'agit ici de la premiere identification fructueuse du liant d'une croute de pigment indien Chumash

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