Activity reconstruction of Rangifer tarandus feet in Fennoscandian -archaeology: Methodological considerations and application to archaeological material from two Sámi habitation sites.

Objective: This study explores the presence and prevalence of working Rangifer tarandus tarandus (domestic reindeer) through entheseal changes present in Rangifer tarandus phalanges at the Sámi habitation sites of Juikenttä and Nukkumajoki, located in Finland and dating from the 14th to the 18th centuries.

Materials: Modern samples (n = 23 phalanges, Rangifer tarandus fennicus; n = 60 phalanges, Rangifer tarandus tarandus non-working; n = 72 phalanges, Rangifer tarandus tarandus working) with known life histories. Archaeological samples (n = 22 phalanges, Juikenttä; n = 118 phalanges, Nukkumajoki).

Frontier Lapita interaction with resident Papuan populations set the stage for initial peopling of the Pacific.

The initial peopling of the remote Pacific islands was one of the greatest migrations in human history, beginning three millennia ago by Lapita cultural groups. The spread of Lapita out of an ancestral Asian homeland is a dominant narrative in the origins of Pacific peoples, and although Island New Guinea has long been recognized as a springboard for the peopling of Oceania, the role of Indigenous populations in this remarkable phase of exploration remains largely untested. Here, we report the earliest evidence for Lapita-introduced animals, turtle bone technology and repeated obsidian import in southern New Guinea 3,480-3,060 years ago, synchronous with the establishment of the earliest known Lapita settlements 700 km away.

Tendons and ligaments of the metapodial and hoof.

, the northern species including both reindeer and caribou, is a pillar of northern ecosystems and the lives of northern peoples. As the only domestic cervid, reindeer are important not only to the herders and hunters who presently interact with them, but also to zooarchaeologists and palaeontologists tracing their histories. Unfortunately, limited anatomical information on muscles is available beyond descriptions of the large muscle groups.

Emergence of a Neolithic in highland New Guinea by 5000 to 4000 years ago.

The emergence of agriculture was one of the most notable behavioral transformations in human history, driving innovations in technologies and settlement globally, referred to as the Neolithic. Wetland agriculture originated in the New Guinea highlands during the mid-Holocene (8000 to 4000 years ago), yet it is unclear if there was associated behavioral change. Here, we report the earliest figurative stone carving and formally manufactured pestles in Oceania, dating to 5050 to 4200 years ago.

A computational study on the characteristics of open-shell H-bonding interaction between carbamic acid (NHCOOH) and HO, HOS or HSO radicals.

Quantum chemical computations were applied to investigate the characteristics of open-shell hydrogen-bonding interactions in the complexes of carbamic acid (NHCOOH, CA) with HO, HOS and HSO radicals. All the resulting complexes were studied using the MP2, B3PW91 and B3LYP computational levels and 6311++G** basis set. Geometry optimizations show that the O-H⋯O contact is stronger than N-H⋯O and S-H⋯O.

Valence Virtual Orbitals: An Unambiguous ab Initio Quantification of the LUMO Concept.

Unlabelled: Many chemical concepts hinge on the notion of an orbital called the lowest unoccupied molecular orbital, or LUMO. This hypothetical orbital and the much more concrete highest occupied molecular orbital (HOMO) constitute the two "frontier orbitals", which rationalize a great deal of chemistry. A viable LUMO candidate should have a sensible energy value, a realistic shape with amplitude on those atoms where electron attachment or reduction or excitation processes occur, and often an antibonding correspondence to one of the highest occupied MOs.

UV-visible spectroscopy of macrocyclic alkyl, nitrosyl and halide complexes of cobalt and rhodium. Experiment and calculation.

Transition metal complexes (NH3)5CoX(2+) (X = CH3, Cl) and L(H2O)MX(2+), where M = Rh or Co, X = CH3, NO, or Cl, and L is a macrocyclic N4 ligand are examined by both experiment and computation to better understand their electronic spectra and associated photochemistry. Specifically, irradiation into weak visible bands of nitrosyl and alkyl complexes (NH3)5CoCH3(2+) and L(H2O)M(III)X(2+) (X = CH3 or NO) leads to photohomolysis that generates the divalent metal complex and ˙CH3 or ˙NO, respectively. On the other hand, when X = halide or NO2, visible light photolysis leads to dissociation of X(-) and/or cis/trans isomerization.