نتایج جستجو برای: bronze

تعداد نتایج: 4369  

Journal: :American journal of physical anthropology 2005
Jaime M Ullinger Susan Guise Sheridan Diane E Hawkey Christy G Turner Robert Cooley

To many Near Eastern archaeologists, the Late Bronze Age-Early Iron Age transition in the southern Levant indicates the emergence of a new ethnicity. The question remains, however, whether changes in the material culture are the result of an invasion of foreigners, or instead arose from shifting cultural and technical practices by indigenous peoples. This study utilized dental morphological tra...

2015
Charles F. W. Higham Katerina Douka Thomas F. G. Higham John P. Hart

There are two models for the origins and timing of the Bronze Age in Southeast Asia. The first centres on the sites of Ban Chiang and Non Nok Tha in Northeast Thailand. It places the first evidence for bronze technology in about 2000 B.C., and identifies the origin by means of direct contact with specialists of the Seima Turbino metallurgical tradition of Central Eurasia. The second is based on...

Journal: :Dalton transactions 2011
Ashley E Devantier Susan J Murch W Stephen McNeil

The chemical reactions of aqueous solutions containing simple transition-metal salts and bidentate nitrogen ligands on bronze surfaces results in a series of brightly coloured patinas. Chemically and physically robust patinas involve a chemical oxidation of the copper atoms within the bronze surface, either by an applied ferric salt or atmospheric dioxygen. The combination of Fe(NO(3))(3)·9H(2)...

2010
T. Bifano R. Krishnamoorthy H. Fawcett E. Welch

In electrolytic in-process dressing (ELID), a metal-bonded grinding wheel is dressed as a result of anodic dissolution. In this paper we describe experiments to evaluate the potential for ELID on bronze wheels in fixed-load grinding applications. A constant-force grinding apparatus was used to determine appropriate ELID conditions for a 10-20 \xm bronze bonded diamond grinding wheel used to mac...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1987
H Y Kim J W Schiefelbein V Raboy D B Furtek O E Nelson

The bz-m13CS9 allele of the bronze-1 gene in maize contains a 902-base-pair defective Suppressor-mutator (dSpm) transposable element in the second exon. Nevertheless, 40-50% of the enzymatic activity conditioned by a nonmutant allele at the bronze-1 locus is routinely recovered in crude extracts prepared from plants carrying bz-m13CS9 in the absence of an autonomous Suppressor-mutator element. ...

Journal: :Ecotoxicology and environmental safety 2005
F B Pyatt A J Pyatt C Walker T Sheen J P Grattan

This paper considers pollution/toxicological science in an archaeological context. Copper mining was an important activity in southern Jordan, especially during the Bronze Age, Nabatean, Roman, and Byzantine periods, and the environmental legacy of such intensive mining and smelting activities exists today in the form of massive, ancient spoil and smelting tips. The environment was heavily poll...

Journal: :پژوهش های ایران شناسی 0
بهرام آجورلو استادیار دانشگاه هنر اسلامی تبریز مرکز تحقیقات مرمت بناها و بافت¬های تاریخی و فرهنگی دانشگاه هنر اسلامی تبریز اسماء سعید کارشناس ارشد پژوهش هنر- دانشگاه هنر اسلامی تبریز

archaeologically, the hybrid and mythological motif of people-scorpion, as presented in both forms of man-scorpion and woman-scorpion, in the horizon of bronze age cultures in the plateau of iran, merely, is reported from the archaeological sites of jiroft in the halil rood basin, southwest iran. in mesopotamia, the people-scorpion is presented as the guardian monster for the gates of dead peop...

2016
V. Gulbin A. Kobelev D. Borissov

We used explosive welding with rolling to produce tliermobimetals on the basis of beryllium bronze and alloys of nickel. It gave us possibility to obtain magnetic and 11011magnetic tliermobilnetals possessi~lg high pllysical and mechanical propel-ties.

Journal: :Genetics 1988
P S Schnable P A Peterson

The bz-rcy allele arose in a single gamete of the TEL (transposable-element laden) population, when the rcy receptor element inserted into the Bronze1 locus. This newly arisen receptor allele conditions a stable bronze kernel phenotype in the absence of the independently segregating regulatory element, Cy. In the presence of Cy, bz-rcy conditions fully colored spots on a bronze background. The ...

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