4''-Dehydrorhodomycin Y

La pregunta sobre la existencia de características comunes inherentes a la psicología de los pueblos Indígenas de todo el mundo ha sido objeto de mucho debate. Nosotros argumentamos que los pueblos Indígenas comparten la experiencia de la colonización, así como sus consecuencias sociales y psicológicas. Desarrollamos este argumento en cuatro secciones: (a) La historia global de la colonización y las desigualdades sociales; (b) aspectos relativos a la identidad y los procesos grupales, incluidas la transmisión intergeneracional de valores compartidos, la conexión con la naturaleza y la promoción del cambio social; (c) el prejuicio y la discriminación hacia los pueblos Indígenas y el rol que juegan los procesos psicológicos para promover relaciones positivas entre los pueblos Indígenas y no-Indígenas; y (d) el impacto del trauma histórico y del colonialismo en la cognición, la salud mental y el bienestar de los pueblos Indígenas, así como la base para el desarrollo de intervenciones exitosas que integran los conocimientos Indígenas. Por último, abordamos los desafíos futuros de la investigación sobre estos temas.

The crystal structure and superconducting properties of a new type of titanium-pnictide superconductor, BaTi2(Sb1-yBiy)2O (y = 0.2, 0.5, and 0.8), are comprehensively investigated over a wide pressure range to elucidate the effect of substituting Bi for Sb on the superconducting behavior. The behavior of superconducting properties under pressure changes drastically with y, as expected from the double-dome Tc-y phase diagram obtained at ambient pressure. In this study, three BaTi2(Sb1-yBiy)2O samples (y = 0.2, 0.5, and 0.8) are considered, which correspond to the first superconducting dome, nonsuperconducting part, and second superconducting dome, respectively, in the Tc-y phase diagram. The crystal of BaTi2(Sb1-yBiy)2O with y = 0.2 shows a clear collapse transition, i.e., a drastic shrinkage of the lattice constant c at ca. 5 GPa. Strictly speaking, the collapsed crystal phase coexists with the noncollapsed phase above 5 GPa. On the other hand, BaTi2(Sb1-yBiy)2O with y = 0.8 shows a continuous change in the crystal lattice with pressure, i.e., no collapse transitions. The pressure dependence of Tc for BaTi2(Sb1-yBiy)2O with y = 0.2 shows a drastic increase in Tc at approximately 5 GPa, where the collapse transition occurs, indicating a clear pressure-induced superconducting phase transition related to the collapse transition. The value of Tc for BaTi2(Sb1-yBiy)2O with y = 0.8 increases slightly up to ~2 GPa and is almost constant at 2-13 GPa. It is found that the superconducting behavior under pressure can be unambiguously classified by y based on the double-dome Tc-y phase diagram, indicative of distinguishable superconducting features at different y values. In this study, we comprehensively discuss the superconducting properties of the exotic material, BaTi2(Sb1-yBiy)2O, with a double-dome Tc-y phase diagram.

Nowadays, the use of Y-chromosome polymorphisms forms an essential part of many forensic DNA investigations. However, this was not always the case. Only since 1992 have we seen that some forensic scientists started to have an interest in this chromosome. In this review, I will sketch a brief history focusing on the forensic use of Y-chromosome polymorphisms. Before describing the various applications of short-tandem repeats (STRs) and single nucleotide polymorphisms (SNPs) on the Y-chromosome, I will discuss a few often ignored aspects influencing proper use and interpretation of Y-chromosome information: (i) genotyping Y-SNPs and Y-STRs, (ii) Y-STR haplotypes shared identical by state (IBS) or identical by descent (IBD), and (iii) Y-haplotype database frequencies.