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Black-topped Pottery
Black-topped pottery is a specialized type of Ancient Egyptian pottery that was found in Nubian archaeological sites, including Elephantine, an island on the Nile River, Nabta Playa in the Nubian Desert, and Kerma in present-day Sudan. This type of artifact dates predominantly to the Predynastic Period, but “a handful of examples made in the Early Dynastic Period are known to exist.” These vessels were used “exclusively for ritual and funerary purposes” and were discovered in ancient cemeteries and settlements. The majority of these pots are variations of the Egyptian ''hes''-jar form and feature red bodies with black tops and interiors. The red color is derived from the natural iron that occurs within Nile silts which oxidizes upon firing, and the black top and interior is a product of reduction firing and carbon smudging. Archaeological chronology The earliest occurrence of black-topped pottery comes from Nabta Playa in the Western Desert of Egypt dating to 5,810±80 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naqada II
The Gerzeh culture, also called Naqada II, refers to the archaeological stage at Gerzeh (also Girza or Jirzah), a prehistoric Egyptian cemetery located along the west bank of the Nile. The necropolis is named after el-Girzeh, the nearby contemporary town in Egypt. Gerzeh is situated only several miles due east of the oasis of Faiyum. The Gerzeh culture is a material culture identified by archaeologists. It is the second of three phases of the prehistoric Naqada cultures and so is also known as Naqada II. The Gerzeh culture was preceded by the Amratian culture ("Naqada I") and followed by the Naqada III ("protodynastic" or "Semainian culture"). Historical context Sources differ on dating, some saying use of the culture distinguishes itself from the Amratian and begins circa 3500 BC lasting through circa 3200 BC. Accordingly, some authorities place the onset of the Gerzeh coincident with the Amratian or Badari cultures, i.e. c.3800 BC to 3650 BC even thoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analytical Chemist
Analytical chemistry studies and uses instruments and methods to separate, identify, and quantify matter. In practice, separation, identification or quantification may constitute the entire analysis or be combined with another method. Separation isolates analytes. Qualitative analysis identifies analytes, while quantitative analysis determines the numerical amount or concentration. Analytical chemistry consists of classical, wet chemical methods and modern, instrumental methods. Classical qualitative methods use separations such as precipitation, extraction, and distillation. Identification may be based on differences in color, odor, melting point, boiling point, solubility, radioactivity or reactivity. Classical quantitative analysis uses mass or volume changes to quantify amount. Instrumental methods may be used to separate samples using chromatography, electrophoresis or field flow fractionation. Then qualitative and quantitative analysis can be performed, often with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Lucas (chemist)
Alfred Lucas (27 August 1867 – 9 December 1945) was an Egyptian-based English analytical chemist and archaeologist. He is best known for being part of Howard Carter's team at the excavation of Tutankhamun's tomb, analysing and conserving many of the finds, but he was also a pioneer in the wider fields of artifact preservation and forensic science. Life Early life Lucas was born in Chorlton-upon-Medlock, Manchester, England, to commercial traveller Joshua Peter Lucas and Sarah (). He studied chemistry in London at the Royal School of Mines and the Royal College of Science, before working for eight years as an assistant chemist at the Government Laboratory in London. Career in Egypt Diagnosed with tuberculosis in 1897, Lucas moved to Egypt a year later where he made a complete recovery. Serving as a chemist with the Egyptian civil service, he worked in Egypt for the rest of his career. After starting in the Salt Department, he was employed in a series of chemical laboratory ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peroxide
In chemistry, peroxides are a group of compounds with the structure , where R = any element. The group in a peroxide is called the peroxide group or peroxo group. The nomenclature is somewhat variable. The most common peroxide is hydrogen peroxide (), colloquially known simply as "peroxide". It is marketed as solutions in water at various concentrations. Many organic peroxides are known as well. In addition to hydrogen peroxide, some other major classes of peroxides are: * Peroxy acids, the peroxy derivatives of many familiar acids, examples being peroxymonosulfuric acid and peracetic acid, and their salts, one example of which is potassium peroxydisulfate. * Main group peroxides, compounds with the linkage (E = main group element). * Metal peroxides, examples being barium peroxide (), sodium peroxide () and zinc peroxide Zinc peroxide (ZnO2) appears as a bright yellow powder at room temperature. It was historically used as a surgical antiseptic. More recently zinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flinders Petrie
Sir William Matthew Flinders Petrie ( – ), commonly known as simply Flinders Petrie, was a British Egyptologist and a pioneer of systematic methodology in archaeology and the preservation of artefacts. He held the first chair of Egyptology in the United Kingdom, and excavated many of the most important archaeological sites in Egypt in conjunction with his wife, Hilda Urlin. Some consider his most famous discovery to be that of the Merneptah Stele, an opinion with which Petrie himself concurred. Undoubtedly at least as important is his 1905 discovery and correct identification of the character of the Proto-Sinaitic script, the ancestor of almost all alphabetic scripts. Petrie developed the system of dating layers based on pottery and ceramic findings. He remains controversial for his pro-eugenics views; he was a dedicated believer in the superiority of the Northern peoples over the Latinate and Southern peoples. Early life Petrie was born on 3 June 1853 in Charlton ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitrification
Vitrification (from Latin ''vitreum'', "glass" via French ''vitrifier'') is the full or partial transformation of a substance into a glass, that is to say, a non-crystalline amorphous solid. Glasses differ from liquids structurally and glasses possess a higher degree of connectivity with the same Hausdorff dimensionality of bonds as crystals: dimH = 3. In the production of ceramics, vitrification is responsible for its impermeability to water. Vitrification is usually achieved by heating materials until they liquidize, then cooling the liquid, often rapidly, so that it passes through the glass transition to form a glassy solid. Certain chemical reactions also result in glasses. In terms of chemistry, vitrification is characteristic for amorphous materials or disordered systems and occurs when bonding between elementary particles (atoms, molecules, forming blocks) becomes higher than a certain threshold value. Thermal fluctuations break the bonds; therefore, the low ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slip (ceramics)
A slip is a clay slurry used to produce pottery and other ceramic wares. Liquified clay, in which there is no fixed ratio of water and clay, is called slip or clay slurry which is used either for joining leather-hard (semi-hardened) clay body (pieces of pottery) together by slipcasting with mould, glazing or decorating the pottery by painting or dipping the pottery with slip.What is slip in pottery thepotterywheel.com, accessed 10 July 2021. Pottery on which slip has been applied either for glazing or decoration is called the . Engobe, from the French word for slip, is an |
Temper (pottery)
A temper is a non-plastic material added to clay to prevent shrinkage and cracking during drying and firing of vessels made from the clay. Tempers may include: *Bone; *Chaff; *Charcoal; *Ground schist; *Wood ash; * Grit; *Sand or crushed sandstone; *Crushed limestone; *Crushed igneous rocks, such as volcanic rock, feldspar, or mica; *Grog; *Plant fiber; *Horse manure (dried and sifted); *Crushed mollusc shells (including fossilized) (see Shell tempering in the Mississippian culture); and *Freshwater sponge spicules. Some clays used to make pottery do not require the addition of tempers. Pure kaolin clay Kaolinite ( ) is a clay mineral, with the chemical composition Al2 Si2 O5( OH)4. It is an important industrial mineral. It is a layered silicate mineral, with one tetrahedral sheet of silica () linked through oxygen atoms to one octahedra ... does not require tempering. Some clays are self-tempered, that is, naturally contain enough mica, sand, or sponge spicules that t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flotation (archaeology)
This page is a glossary of archaeology, the study of the human past from material remains. A B C D E F G H I K L M N O P Q R S T U V W X Y Z See also * Outline of archaeology * Table of years in archaeology * Glossary of history References Bibliography * * * * * * * External links About.com Archaeology Glossary {{Glossaries of science and engineering Archaeology Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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