Changes in Late Funnel Beaker Pottery at the End of the 4th Millennium BC on the Polish Lowland: Case of Mrowino, Site 3. Preliminary Report on Mineralogical and Petrographic Research

2020 ◽  
Vol 24 (1) ◽  
pp. 204-219
Author(s):  
Anna Rauba-Bukowska ◽  
Marzena Szmyt ◽  
Danuta Żurkiewicz

Abstract Archaeological site no. 3 at Mrowino is located on the Polish Lowland, in the Greater Poland region. It was excavated from 1973 until 1980. The excavation produced very rich movable finds, with the core of them being formed by Funnel Beaker culture (FBC) ceramics. The collections hold over 37,500 FBC pottery shards and several intact or reconstructed vessels. The vast majority of pottery comes from an FBC settlement dated to 3300-3150 BC. The pottery set includes vessels of clear Baden culture connections. For the mineral-ogical and petrographic study, 40 samples were selected to identify mineral and rock components of the ceramic body and compare the ways of raw-material preparation. In the studied samples, boulder clay in all probability was used to make the vessels. All studied samples were made from clay with grog and a small amount of sand as temper. In addition, several samples contained igneous rock crumbs. To find out if this was a deliberate or accidental admixture, it is necessary to carry out further research.

Vsyo o myase ◽  
1918 ◽  
pp. 44-47
Author(s):  
V.V. Nasonova ◽  
◽  
A.A. Motovilina ◽  
E.K. Tunieva ◽  
T.G. Kuznetsova ◽  
...  

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 200-209
Author(s):  
Caiyun Zhang ◽  
Chunhong Li ◽  
Bolin Ji ◽  
Zhaohui Jiang

Abstract A fast, simple, and energy-saving microwave-assisted approach was successfully developed to prepare carbon microspheres. The carbon microspheres with a uniform particle size and good dispersity were prepared using glucose as the raw material and HCl as the dehydrating agent at low temperature (90°C) in an open system with the assistance of microwave heating. The carbon microspheres were characterized by elemental analysis, XRD, SEM, FTIR, TG, and Raman. The results showed that the carbon microspheres prepared under the condition of 18.5% (v/v) HCl and heating for 30 min by microwave had a narrow size distribution. The core–shell structure of the carbon core and TiO2 shell was prepared with (NH4)2TiF6, H3BO3 using the microwave-assisted method. The hollow TiO2 microspheres with good crystallinity and high photocatalytic properties were successfully prepared by sacrificing the carbon microspheres.


2002 ◽  
Vol 54 (11) ◽  
pp. 534-539 ◽  
Author(s):  
Sorada Yoenyongbuddhagal ◽  
Athapol Noomhorm

2020 ◽  
Vol 1 ◽  
pp. 96-106 ◽  
Author(s):  
Xenofon Spiliotis ◽  
Vayos Karayannis ◽  
Stylianos Lamprakopoulos ◽  
Konstantinos Ntampegliotis ◽  
George Papapolymerou

In the current research, the valorization of olive mill solid waste as beneficial admixture into clay bodies for developing greener ceramic materials with lower thermal conductivity, thus with increased thermal insulation capacity towards energy savings, is investigated. Various clay/waste mixtures were prepared. The raw material mixtures were characterized and subjected to thermal gravimetric analysis, in order to optimize the mineral composition and maintain calcium and magnesium oxides content to a minimum. Test specimens were formed employing extrusion and then sintering procedure at different peak temperatures. Apparent density, water absorption capability, mechanical strength, porosity and thermal conductivity were determined on sintered specimens and examined in relation to the waste percentage and sintering temperature. The experimental results showed that ceramic production from clay/olive-mill solid waste mixtures is feasible. In fact, the mechanical properties are not significantly impacted with the incorporation of the waste in the ceramic body. However, the thermal conductivity decreases significantly, which can be of particular interest for thermal insulating materials development. Furthermore, the shape of the produced ceramics does not appear to change with the sintering temperature increase.


2014 ◽  
Vol 64 ◽  
pp. 33-57 ◽  
Author(s):  
Samantha Lee Allcock ◽  
Neil Roberts

AbstractMore than 50 years of archaeological survey work carried out in Cappadocia in central Turkey has produced a number of important contributions to the understanding of long-term settlement histories. This article synthesises and critically evaluates the results of three field surveys conducted in Cappadocia which recorded material remains dating from the Early Holocene through to the establishment of the Republic of Turkey. Results from the combined Cappadocia surveys reveal temporal patterns over the longue durée that include a lack of detectable pre-Neolithic occupation and important exploitation of obsidian as a raw material during the Neolithic. There was growth and expansion of settlement during the later Chalcolithic and Early Bronze Age, a steady continuation of settlement during the Middle and Late Bronze Ages, followed by rupture in settlement at the end of the Bronze Age. A new phase of settlement expansion began during the Iron Age and continued through Hellenistic and Roman times. This in turn was disrupted during the Byzantine period, which is associated with increased numbers of fortified sites. The succeeding long cycle of settlement began in Seljuk times and continued through to the end of the Ottoman period. Comparison with systematic archaeological site surveys in the adjacent regions of Paphlagonia and Konya shows some differences in settlement patterns, but overall broad sim¬ilarities indicate a coherent trajectory of settlement across central Anatolia over the last ten millennia.


2020 ◽  
Vol 87 (3) ◽  
pp. 360-363
Author(s):  
Diego Araújo Frazilio ◽  
Otávio Guilherme Gonçalves de Almeida ◽  
Carlos Augusto Fernandes de Oliveira ◽  
Sarah Hwa In Lee ◽  
Carlos Humberto Corassin ◽  
...  

AbstractFor this research communication, 90 samples of a Brazilian dairy were combined into four groups (raw material, final product, food-contact and non-food contact surfaces) and analyzed by metataxonomics based on 16S rRNA gene sequencing. The results showed high alpha-diversity indexes for final product and non-food contact surfaces but, overall, beta-diversity indexes were low. The samples were separated in two main clusters, and the core microbiota was composed by Macrococcus, Alkaliphilus, Vagococcus, Lactobacillus, Marinilactibacillus, Streptococcus, Lysinibacillus, Staphylococcus, Clostridium, Halomonas, Lactococcus, Enterococcus, Bacillus and Psychrobacter. These results highlight that rare taxa occur in dairies, and this may aid the development of strategies for food protection.


Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 599 ◽  
Author(s):  
Hamid R. Taghiyari ◽  
Abolfazl Soltani ◽  
Ayoub Esmailpour ◽  
Vahid Hassani ◽  
Hamed Gholipour ◽  
...  

An issue in engineered wood products, like oriented strand lumber (OSL), is the low thermal conductivity coefficient of raw material, preventing the fast transfer of heat into the core of composite mats. The aim of this paper is to investigate the effect of sepiolite at nanoscale with aspect ratio of 1:15, in mixture with urea-formaldehyde resin (UF), and its effect on thermal conductivity coefficient of the final panel. Sepiolite was mixed with UF resin for 20 min prior to being sprayed onto wood strips in a rotary drum. Ten percent of sepiolite was mixed with the resin, based on the dry weight of UF resin. OSL panels with two resin contents, namely 8% and 10%, were manufactured. Temperature was measured at the core section of the mat at 5-second intervals, using a digital thermometer. The thermal conductivity coefficient of OSL specimens was calculated based on Fourier’s Law for heat conduction. With regard to the fact that an improved thermal conductivity would ultimately be translated into a more effective polymerization of the resin, hardness of the panel was measured, at different depths of penetration of the Janka ball, to find out how the improved conductivity affected the hardness of the produced composite panels. The measurement of core temperature in OSL panels revealed that sepiolite-treated panels with 10% resin content had a higher core temperature in comparison to the ones containing 8% resin. Furthermore, it was revealed that the addition of sepiolite increased thermal conductivity in OSL panels made with 8% and 10% resin contents, by 36% and 40%, respectively. The addition of sepiolite significantly increased hardness values in all penetration depths. Hardness increased as sepiolite content increased. Considering the fact that the amount of sepiolite content was very low, and therefore it could not physically impact hardness increase, the significant increase in hardness values was attributed to the improvement in the thermal conductivity of panels and subsequent, more complete, curing of resin.


DoisPontos ◽  
2005 ◽  
Vol 1 (1) ◽  
Author(s):  
Cristina Diniz Mendonça

Parte de um percurso em que tratamos de expor a estrutura filosófica LÊtre et lê Néant (EN), o presente estudo procura mostrar que essa obra é o ponto fundamental de transição onde se dá, no pensamento sartriano, a metamorfose de uma teoria do tempo como destino trágico numa teoria do tempo como salvação. Completa-se, aqui, o processo de radicalização de Heidegger efetivado por Sartre: do pessimismo próprio do Dasein, que caminha impotente e solitário para a morte, passamos ao otimismo resultante da descoberta de uma temporalidade que cura. Na tentativa de compreender o sentido e a função dessa nova figura da temporalidade, desmontamos o mecanismo do curto-circuito especulativo que inverte, em EN, o sinal do Tempo do Mundo heideggeriano. Tal desmontagem levou-nos a surpreender o fio filosófico do livro entrelaçado numa trama históricoliterária. Ao examinar os termos desse reencontro da elaboração filosófica com a matéria viva da história, circunscrevendo uma zona (recuada) em que estruturas díspares se interpenetram, terminamos por identificar o conteúdo de experiência cifrado no movimento especulativo dos conceitos desse que é considerado o mais abstrato (e técnico) tratado de Metafísica dos Tempos Modernos. Pretendendo apenas descrever (no sentido da fenomenologia alemã) as estruturas universais da realidade humana (intemporais por definição), Sartre dá com o cerne de uma conjuntura histórica precisa: não a matéria bruta, é claro, mas sua reconstrução política e literária, talhada nos moldes da Resistência e transposta para a forma filosófica de EN.Sartre. Tempo. Metafísica. Política. When Time heals the Wounds of Time itself AbstractPart of a trajectory in which we expose the philosophical structure of L´Être et le Néant (EN), this study aims at demonstrating that this work is the fundamental transition point where, in Sartre´s thought, a theory of time as a tragic destiny metamorphoses itself into a theory of time as salvation. Here, Sartres project of radicalizing Heidegger is completed: from Daseins peculiar pessimism, which proceeds in a lonely and impotent way towards death, we move to the optimism resulting from the discovery of a temporality that cures. In the attempt to understand the meaning and the function of this new figure of temporality, we dismantle the speculative short circuit mechanism that inverts, in EN, the sign of Heideggers Time of the World. This dismantling leads to our discovery of the philosophical red thread of the book entwined in a historical literary plot. When we examine the terms of this reencounter of philosophical creation with the living matter of history, establishing a zone (set back) in which different structures merge, we end up identifying the contents of experience which appear in the conceptual speculative movement of that work which is considered as the most abstract (and technical) treatise of Metaphysics of Modern Times. Intending only to describe (in the sense of German phenomenology) the universal structures of human reality (intemporal by definition), Sartre encounters the core of a precise historical conjunction not the raw material, of course, but its political and literary reconstruction, shaped in the patterns of the Resistance and transposed to the philosophical form of EN.Sartre. Time. Metaphysics. Politics. 


Author(s):  
Rungroj Arjwech ◽  
Mark E. Everett ◽  
Sakhon Saengchomphu ◽  
Kittipong Somchat ◽  
Potpreecha Pondthai

The increasing demand for gypsum as a raw material for construction projects motivates exploration for additional reserves. Electrical resistivity tomography (ERT) and seismic refraction geophysical methods, augmented with borehole and laboratory measurements on core samples, are used here to delineate the top, bottom and lateral boundaries of an important gypsum ore deposit in Thailand, an economically developing region. The gypsum-bearing formation is found throughout the study area to have an irregular upper boundary on account of karstic dissolution processes. The deeper transition from gypsum to anhydrite, however, is not constrained by the measurements. The P-wave velocity measured in the field is consistent with the core specimen measurements. The electrical resistivity of the core specimens, however, is substantially higher than the values measured in the field. The specimen measurements may depend on the presence of micro cracks, whereas electrical resistivity in the field may be affected by the enclosing clay-rich materials.


Clay Minerals ◽  
2018 ◽  
Vol 53 (4) ◽  
pp. 621-641 ◽  
Author(s):  
Ágnes Gál ◽  
Corina Ionescu ◽  
Mátyás Bajusz ◽  
Vlad A. Codrea ◽  
Volker Hoeck ◽  
...  

ABSTRACTSecond-century CE (common era) household pottery sherds found in the city ofNapoca(present day Cluj-Napoca, Romania) in Roman Dacia were investigated by polarized light optical microscopy, X-ray powder diffraction, Fourier-transform infrared spectroscopy and cold field emission scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy to obtain information on technology, raw materials and site of production. Compositionally, all samples are similar with comparable fine and semi-fine microstructures and oriented microtextures. Optically, there is a gradual transition from microcrystalline to an amorphous illitic-muscovitic matrix. The small aplastic inclusions are mostly quartz and feldspar. Fine-grained carbonate aggregates are distributed inhomogeneously in the ceramic body. Well-preserved Middle Miocene foraminifera tests are characteristic of the ceramics. The gradual thermal changes of the matrix and the newly formed phases upon firing, such as ‘ceramic melilite’, Fe-gehlenite, clinopyroxene, glass, hematite and some maghemite support inferences regarding the technological constraints in producing the pottery. The firing took place in a mostly oxidizing atmosphere and the temperature extended from at least 850°C to >900°C. The Middle Miocene marly clay from the area surrounding the site shows similar mineralogical and micropalaeontological contents to those of the ceramic specimens and is the best candidate for the raw material used for local production of the Roman pottery.


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