Results 121 to 130 of about 315,352 (293)

Effects of Calcium Hydroxide Paste and Access Cavities on Fracture Strength of Mature and Simulated Immature Human Teeth: Ex Vivo

Australian Endodontic Journal, EarlyView.
ABSTRACT The aim was to examine whether a Ca(OH)2 paste affects fracture strength of teeth. Sixty extracted maxillary central incisors were prepared to simulate immature teeth. Another 40 were used as mature teeth. The ten groups (n = 10) were: (1) immature control; (2) immature + access; (3) immature + access + 1 m Ca(OH)2; (4) immature + access + 12 ...
Naseem M. Hashim, Paul V. Abbott
wiley   +1 more source

THE EFFECTS OF ADDING NANO ZrO2 ON THE PHYSICAL AND SOME MECHANICAL PROPERTIES OF CEMENT PASTE

Journal of Engineering and Sustainable Development, 2020
The aims of this work are study the effects of adding nano zirconia ZrO2 particles (NZ) on the physical and some mechanical properties of cement paste like: porosity, dry density, water absorption and compressive strength, where different cement ...
Ahmed Hussein Ali , Mohammed Ramaid Gharkan, Sarmad Imad Ibrahim   +2 more
doaj  

Materials Characterization and Technological Aspects of Hellenistic Grey Ware Lamps From Nysa‐Scythopolis (Israel): Evidence Suggesting Local Production?

Archaeometry, EarlyView.
ABSTRACT Grey ware lamp fragments and a production waster from Tell Iẓṭabba (Israel) were analyzed to determine their manufacturing technology and provenance. These were compared with a light brown‐orange reference fabric from the same site.
Dana Ashkenazi, Anat Cohen‐Weinberger, Achim Lichtenberger, Oren Tal   +3 more
wiley   +1 more source

An Uncommon Instance of Egyptian Blue in the “Pigmented Intonachino” of the Fishpond Wall Painting From the Roman Villa of Torre di Pordenone (Northeast Italy)

Archaeometry, EarlyView.
ABSTRACT The increasingly close integration of analytical techniques in the study of Greek and Roman wall paintings has shown that Egyptian blue was a common pigment, widely documented in the production of blue and greenish hues in ancient painted production.
Simone Dilaria, Clelia Sbrolli, Hilary Becker, Yotam Asscher, Anna De Zotti, Monica Salvadori   +5 more
wiley   +1 more source

Incorporação de nanobastões de carbeto de silício em matrizes cimentícias [PDF]

, 2015
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil, Florianópolis, 2015.Desde a sua descoberta, os nanomateriais vêm despertando interesse no desenvolvimento tecnológico de ...
Azevedo, Nágilla Huerb de
core  

Without Scratching the Surface: Depth Profiling Compositional Muon Analysis of Ancient Faience From Egypt and Sudan

Archaeometry, EarlyView.
ABSTRACT The specific depth‐profiling capabilities of the muonic x‐ray emission spectroscopy (μ‐XES) technique have proved to be effective for examination of the elemental distribution within ancient coins. This ‘layered’ analysis can also be applied to the examination of ancient faience, the production of which can result in distinct layers (glaze ...
Juliet V. Spedding, Sayani Biswas, Adrian D. Hillier   +2 more
wiley   +1 more source

Tongue and Glottis Morphology of Cathartes aura and the Secret of Its Functional Adaptation

Acta Zoologica, EarlyView.
ABSTRACT Cathartes aura, commonly known as the Turkey vulture, is a scavenger bird belonging to the family Cathartidae that is widely distributed throughout the Americas and classified as a New World vulture. Its diet primarily consists of small‐sized carcasses, predominantly of wild animals.
Jean Caio Figueiredo de Almeida, Max Alex Santos Ferreira, Elane Guerreiro Giese, Alanna do Socorro Lima da Silva, Ana Rita de Lima, Érika Branco   +5 more
wiley   +1 more source

Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash

矿业科学学报, 2016
The effect of ultrafine circulating fluidized bed fly ash (UCFA) on physical and mechanical properties of cement containing different contents of circulating fluidized bed fly ash (CFA) is studied，through rheological property and mortar strength of fresh
Ren Caifu, Wang Dongmin, Zheng Dapeng, Li Duanle, Wang Yiren   +4 more
doaj  

Influence of carbonate apatite nanoparticles incorporated into commercial dental adhesives on immediate and long‐term microtensile bond strength

European Journal of Oral Sciences, EarlyView.
Abstract This study assessed whether integrating carbonate apatite nanoparticles with a CO3/PO4 molar ratio of 5 (CA5n) into commercial adhesives affected the immediate or the long‐term microtensile bond strength (µTBS) between composite resin and dentin.
Heba E. AbdelRazik, Jon E. Dahl, Mina Aker Sagen   +2 more
wiley   +1 more source

Thixotropy of cement pastes

, 2004
Les nouveaux matériaux cimentaires fluides présentent des propriétés de thixotropie, phénomène réversible de gélification (au repos) - liquéfaction (en écoulement), qu'il est nécessaire de comprendre et de caractériser. Des essais croisés de rhéométrie globale (rhéomètre classique) et locale (vélocimétrie IRM) permettent d'obtenir le comportement ...
openaire   +1 more source