We successfully extracted DNA from a bone sample of a Neolithic skeleton (dated 3,600 +/- 60 years BP) excavated in northeastern Yakutia (east Siberia). Ancient DNA was analyzed by autosomal STRs (short tandem repeats) and by sequencing of the hypervariable region I (HV1) of the mitochondrial DNA (mtDNA) control region. The STR profile, the mitochondrial haplotype, and the haplogroup determined were compared with those of modern Eurasian and Native American populations. The results showed the affinity of this ancient skeleton with both east Siberian/Asian and Native American populations.

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Поступила в редакцию 23. 03.2018 Аннотация. Методом двухступенчатой катодно-анодной хроноамперометрии изучено влияние фазового состава пленочных сплавов Pd53Cu на процессы инжекции и экстракции атомарного водорода. Исследования проведены в водном растворе 0.1М H 2 SO 4 . Установлено, что инжекция атомарного водорода в сплав в начальный период протекает в диффузионно-фазограничном режиме, а затем -диффузионном. Найдены кинетические и диффузионные параметры фазограничного проникновения водорода и его последующей твердофазной диффузии. Выявлена роль фазового состава и кристаллографической ориентации сплава на водородопроницаемость. Показано, что перенос атомарного водорода в сплаве главным образом происходит по телу зерна, а не по межфазным границам.Ключевые слова: катодно-анодная хроноамперометрия, Pd53Cu, β-фаза твердого раствора Cu-Pd, пленочные электроды, водородопроницаемость, фазовый состав, кристаллографическая ориентация поверхности.Abstract. The purpose of this work was to reveal the infl uence of the phase composition and the crystallographic orientation of fi lm samples of Pd-Cu solid solution on the parameters of extraction and injection of atomic hydrogen in aqueous solution of sulphuric acid. The study was carried out using a two-step cathode-anode chronoamperometry method. The fi lms of the Pd53Cu alloy of various thickness were obtained by magnetron sputtering. They were characterised by the same phase (100% of theβ -phase of a solid solution) and chemical composition. It was confi rmed that during the initial period (≤ 4 s, the injection of atomic hydrogen proceeds in a mixed diffusion-phase-boundary regime, which later transforms into a purely diffusion mode. The kinetic and diffusion parameters of the stages of phase-boundary penetration of hydrogen and its subsequent solid-phase diffusion were calculated by the cathodic and anodic current decays. It was established that regardless of the thickness of the sample, an increase in the β phase fraction in the alloy leads to a marked increase in the diffusion coeffi cient of atomic hydrogen and, consequently, to an increase in the hydrogen permeability constant. The crystallographic orientation only affects the stage of phase-boundary penetration of hydrogen into the fi lm alloy. The data obtained confi rm the preferential movement of hydrogen along the grain body rather than over the interphase boundaries.