Relevant bibliographies by topics / Chemical chronology

Academic literature on the topic 'Chemical chronology'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Chemical chronology"

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Kilby, GW, and GE Batley. "Chemical indicators of sediment chronology." Marine and Freshwater Research 44, no. 4 (1993): 635. http://dx.doi.org/10.1071/mf9930635.

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The determination of recent sedimentation rates has traditionally used radiochemical dating techniques but, because of limited laboratory facilities and the costs of these techniques, alternative methods are desirable. Information on sedimentation rates and sediment history can be obtained from anthropogenic chemical components whose presence in sediments, especially near urban areas, can be used as markers to assess their chronology. More than one marker, with a known date of introduction, should be used. In this study, organosilicons first used in the early 1950s and tributyltin used in marine antifouling paints from 1972 were examined in sediments from Lake Macquarie, NSW, to supplement the known input of heavy metals from the lead-zinc smelter that has been operating at the northern end of the lake since 1897. The most reliable data were obtained at sites where all three markers were present, and use of these data allowed independent determination of the year of initial operation of a sewage treatment works.
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Rodgers, S. D., S. B. Charnley, R. G. Smith, and H. M. Butner. "Chemical chronology of the Southern Coalsack." Monthly Notices of the Royal Astronomical Society 379, no. 2 (August 1, 2007): 807–15. http://dx.doi.org/10.1111/j.1365-2966.2007.11985.x.

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Altavilla, Keith. "The Greater New York Sports Chronology." Journal of Sport History 37, no. 3 (October 1, 2010): 472–73. http://dx.doi.org/10.5406/jsporthistory.37.3.472.

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Sigl, Michael, Tyler J. Fudge, Mai Winstrup, Jihong Cole-Dai, David Ferris, Joseph R. McConnell, Ken C. Taylor, et al. "The WAIS Divide deep ice core WD2014 chronology – Part 2: Annual-layer counting (0–31 ka BP)." Climate of the Past 12, no. 3 (March 30, 2016): 769–86. http://dx.doi.org/10.5194/cp-12-769-2016.

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Abstract. We present the WD2014 chronology for the upper part (0–2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide (WD) ice core. The chronology is based on counting of annual layers observed in the chemical, dust and electrical conductivity records. These layers are caused by seasonal changes in the source, transport, and deposition of aerosols. The measurements were interpreted manually and with the aid of two automated methods. We validated the chronology by comparing to two high-accuracy, absolutely dated chronologies. For the Holocene, the cosmogenic isotope records of 10Be from WAIS Divide and 14C for IntCal13 demonstrated that WD2014 was consistently accurate to better than 0.5 % of the age. For the glacial period, comparisons to the Hulu Cave chronology demonstrated that WD2014 had an accuracy of better than 1 % of the age at three abrupt climate change events between 27 and 31 ka. WD2014 has consistently younger ages than Greenland ice core chronologies during most of the Holocene. For the Younger Dryas–Preboreal transition (11.595 ka; 24 years younger) and the Bølling–Allerød Warming (14.621 ka; 7 years younger), WD2014 ages are within the combined uncertainties of the timescales. Given its high accuracy, WD2014 can become a reference chronology for the Southern Hemisphere, with synchronization to other chronologies feasible using high-quality proxies of volcanism, solar activity, atmospheric mineral dust, and atmospheric methane concentrations.
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Sigl, M., T. J. Fudge, M. Winstrup, J. Cole-Dai, D. Ferris, J. R. McConnell, K. C. Taylor, et al. "The WAIS Divide deep ice core WD2014 chronology – Part 2: Annual-layer counting (0–31 ka BP)." Climate of the Past Discussions 11, no. 4 (July 24, 2015): 3425–74. http://dx.doi.org/10.5194/cpd-11-3425-2015.

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Abstract. We present the WD2014 chronology for the upper part (0–2850 m, 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide ice core. The chronology is based on counting of annual layers observed in the chemical, dust and electrical conductivity records. These layers are caused by seasonal changes in the source, transport, and deposition of aerosols. The measurements were interpreted manually and with the aid of two automated methods. We validated the chronology by comparing to two high-accuracy, absolutely dated chronologies. For the Holocene, the cosmogenic isotope records of 10Be from WAIS Divide and 14C for Intcal13 demonstrated WD2014 was consistently accurate to better than 0.5 % of the age. For the glacial period, comparisons to the Hulu Cave chronology demonstrated WD2014 had an accuracy of better than 1 % of the age at three abrupt climate change events between 27 and 31 ka. WD2014 has consistently younger ages than Greenland ice-core chronologies during most of the Holocene. For the Younger Dryas-Preboreal transition (11 546 ka BP, 24 years younger) and the Bølling-Allerød Warming (14 576 ka, 7 years younger) WD2014 ages are within the combined uncertainties of the timescales. Given its high accuracy, WD2014 can become a reference chronology for the Southern Hemisphere, with synchronization to other chronologies feasible using high quality proxies of volcanism, solar activity, atmospheric mineral dust, and atmospheric methane concentrations.
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SAWADA, MUTSUYO. "Chronology of Ancient Buddhist Banners." FIBER 60, no. 4 (2004): P.76—P.81. http://dx.doi.org/10.2115/fiber.60.p_76.

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Fowler, David, Peter Brimblecombe, John Burrows, Mathew R. Heal, Peringe Grennfelt, David S. Stevenson, Alan Jowett, et al. "A chronology of global air quality." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2183 (September 28, 2020): 20190314. http://dx.doi.org/10.1098/rsta.2019.0314.

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Air pollution has been recognized as a threat to human health since the time of Hippocrates, ca 400 BC. Successive written accounts of air pollution occur in different countries through the following two millennia until measurements, from the eighteenth century onwards, show the growing scale of poor air quality in urban centres and close to industry, and the chemical characteristics of the gases and particulate matter. The industrial revolution accelerated both the magnitude of emissions of the primary pollutants and the geographical spread of contributing countries as highly polluted cities became the defining issue, culminating with the great smog of London in 1952. Europe and North America dominated emissions and suffered the majority of adverse effects until the latter decades of the twentieth century, by which time the transboundary issues of acid rain, forest decline and ground-level ozone became the main environmental and political air quality issues. As controls on emissions of sulfur and nitrogen oxides (SO 2 and NO x ) began to take effect in Europe and North America, emissions in East and South Asia grew strongly and dominated global emissions by the early years of the twenty-first century. The effects of air quality on human health had also returned to the top of the priorities by 2000 as new epidemiological evidence emerged. By this time, extensive networks of surface measurements and satellite remote sensing provided global measurements of both primary and secondary pollutants. Global emissions of SO 2 and NO x peaked, respectively, in ca 1990 and 2018 and have since declined to 2020 as a result of widespread emission controls. By contrast, with a lack of actions to abate ammonia, global emissions have continued to grow. This article is part of a discussion meeting issue ‘Air quality, past present and future’.
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Nijampurkar, V. N., N. Bhandari, D. V. Borole, and U. Bhattacharya. "Radiometric Chronology of Changme-Khangpu Glacier Sikkim." Journal of Glaciology 31, no. 107 (1985): 28–33. http://dx.doi.org/10.1017/s0022143000004950.

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AbstractThe32Si concentration in a sample of surface ice from the snout of Changme-Khangpu glacier is 0.36 disintegrations per minute/tonne compared to the fall-out value of 0.7 d.p.m./tonne. If this decrease is assumed to be solely due to decay of32Si, an age offc. 100 years is estimated for the surface ice of the snout, leading to an average flow velocity ofc. 40 m/year for the past century. A vertical profile of210Pb in a core taken at an altitude of 5040 m shows two horizons where this isotope is enriched, one between 3 and 4 m and another between 11 and 12 m, indicating that the primary concentration of210Pb can change by physico-chemical processes like adsorption on dust. None the less, a longitudinal profile along the glacier shows a systematic decrease of210Pb activity with decreasing altitude, the surface ice of the snout giving a value of 0.2 d.p.m./l, corresponding to an age of 100 years which is concordant with the32Si age. This surface flow-rate of the glacier is much larger than the average contemporary flow-rate(c.13m/year). The difference can be understood in terms of the past history of advance and recession of the glacier as revealed by the geomorphic evidence.
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Nijampurkar, V. N., N. Bhandari, D. V. Borole, and U. Bhattacharya. "Radiometric Chronology of Changme-Khangpu Glacier Sikkim." Journal of Glaciology 31, no. 107 (1985): 28–33. http://dx.doi.org/10.3189/s0022143000004950.

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AbstractThe 32Si concentration in a sample of surface ice from the snout of Changme-Khangpu glacier is 0.36 disintegrations per minute/tonne compared to the fall-out value of 0.7 d.p.m./tonne. If this decrease is assumed to be solely due to decay of 32Si, an age off c. 100 years is estimated for the surface ice of the snout, leading to an average flow velocity of c. 40 m/year for the past century. A vertical profile of 210Pb in a core taken at an altitude of 5040 m shows two horizons where this isotope is enriched, one between 3 and 4 m and another between 11 and 12 m, indicating that the primary concentration of 210Pb can change by physico-chemical processes like adsorption on dust. None the less, a longitudinal profile along the glacier shows a systematic decrease of 210Pb activity with decreasing altitude, the surface ice of the snout giving a value of 0.2 d.p.m./l, corresponding to an age of 100 years which is concordant with the 32Si age. This surface flow-rate of the glacier is much larger than the average contemporary flow-rate (c. 13m/year). The difference can be understood in terms of the past history of advance and recession of the glacier as revealed by the geomorphic evidence.
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Lupiáñez, José A., and Eva E. Rufino-Palomares. "Phytochemicals: “A Small Defensive Advantage for Plants and Fungi; a Great Remedy for the Health of Mankind”." Molecules 26, no. 20 (October 12, 2021): 6159. http://dx.doi.org/10.3390/molecules26206159.

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In the chronology of Biochemistry, as a new science that emerged in the mid-nineteenth century after its separation from Organic Chemistry and Physiology, its beginnings were characterized by an intense search and subsequent isolation and characterization of different organic compounds that were part of the chemical composition of living organisms [...]
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Dissertations / Theses on the topic "Chemical chronology"

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Merceron, Thierry. "Les altérations hydrothermales de la coupole granitique d'échassières et de son environnement (sondage gpf echa n1)." Poitiers, 1988. http://www.theses.fr/1988POIT2330.

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Reconstitution chronologique de l'alteration hydrothermale du granite de beauvoir, apex granitique d'echassieres (massif central), a partir des donnees petrographiques, mineralogiques, et datations k-ar. L'etude des isotopes stables oxygene-hydrogene et des inclusions fluides a permis d'etablir un modele thermodynamique sur le refroidissement du magma granitique. Dans les micashistes ces phenomenes hydrothermaux se superposent aux alterations associees au stockwerk a wolframite de l'hypothetique granite de la bosse
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Grammer, Gretchen Lynn. "Using biogeochemical tracers and sclerochronologies derived from fish otoliths to detect environmental change." Thesis, 2015. http://hdl.handle.net/2440/106775.

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Biogeochemical tracers and sclerochronologies are used to answer many ecological questions that require linking organisms with the environment. Calcified hard parts of organisms that remain chemically inert after formation are particularly advantageous for extracting information (e.g. otoliths, shells, coral) on both the organism and the environment. These structures have growth increments enabling time-resolved information to be extracted on a range of time-scales (sub-daily to centennial). For my research, otoliths (fish earstones) were chosen as an environmental proxy, as they contain both biogeochemical (i.e. radiocarbon and trace elements) and sclerochronological (i.e. growth) signals that reflect environmental change in marine systems. My overarching aim is to use otolith-based proxy records to provide new data describing environmental change in marine systems of southern Australia and New Zealand. More specifically, I employ biogeochemical tracers and sclerochronologies to: (1) detect changes in radiocarbon transport through time in marine waters; (2) establish a radiocarbon record for upwelled waters in the southeastern Indian Ocean; (3) examine local and regional effects of climate forcing on fish growth, and (4) determine the physiological controls acting upon trace element assimilation into otoliths and the differences in chemical constituents of an upwelled water mass. Otoliths of deep water fish – ocean perch from the genus Helicolenus – are used in all applications and originate from areas along southern Australia and New Zealand. Thus, the biogeochemical and sclerochronological data derived from these fish describe changes occurring in the marine environments of the southwest Pacific and southeastern Indian Oceans. Radiocarbon records from the otoliths of H. barathri, combined with published records of other fish species in the southwest Pacific Ocean, show transport of the bomb radiocarbon signal from marine surface waters to depths approaching 1000 m. Transports lags ranging from 5 to 20 years are documented, and radiocarbon reservoir ages are calculated for water masses associated with the Tasman Sea. Radiocarbon measurements from H. percoides, in an upwelling area along the southern coast of Australian (southeastern Indian Ocean), are the very first radiocarbon time series documented for the region and reflect the lower radiocarbon values expected for seasonally upwelled water. Long term growth responses resulting from sclerochronologies from a Helicolenus species complex from southern Australia to New Zealand are compared across regions and species with broad- and local-scale climatic/oceanographic variables using univariate mixed effects models. These data demonstrate how broad scale climate patterns and weather can have additive or synergistic effects on the local environment, which are reflected in the growth of the fish. Biogeochemical tracers (Na, Sr, Mg, Ba, Li) and sclerochronologies (growth) are also extracted from otoliths of the same fish in this upwelling region. These data are used simultaneously in combination with univariate and multivariate mixed effects modelling to describe physiological and environmental controls on otolith chemistry. Temporal signals within these data are correlated with seasonal upwelling events. Ba:Ca and Li:Ca are more influenced by the environment, while Sr:Ca and Na:Ca are controlled by physiological processes. Ba:Ca negatively tracks upwelling events, suggesting an upwelled water mass not enriched in Ba. Li:Ca correlates positively with chlorophyll-a, indicating a possible proxy for marine productivity. Thus, the overarching aim of this research has been achieved: biogeochemical tracers and sclerochronologies derived from Helicolenus otoliths have provided new data describing environmental change in marine systems of southern Australia and New Zealand.
Thesis (Ph.D.) (Research by Publication) -- University of Adelaide, School of Biological Sciences, 2015.
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Sree, Rama Murthy A. "Physicochemical Characterization and Gas Sensing Studies of Cr1-xFexNbO4 and Application of Principal Component Analysis." Thesis, 2016. http://hdl.handle.net/2005/3215.

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Monitoring the working environment of laboratories and industries for pollutants is of primary concern to ensure the healthiness of working personnel. Semiconducting metal oxides (SMOs) are sensitive to the gas ambience and can be tuned for sensing purpose. As SMOs are not selective, an array of sensors with differential selectivity may resolve to great extent. The objective of the thesis is to understand the physicochemical properties and gas sensing characteristics of Cr1-xFexNbO4. Applying principal component analysis to the sensor response data either for selection of features or for differentiation of analysts is also of concern. Preparation of Cr1-xFexNbO4, phase characterization, lattice parameters estimation, morphological and micro chemical analysis (SEM & EDX), electrical characterization by direct current (DC & AC) in the temperature range of 423 K to 573 K, weighted magnetic moment of iron and chromium deduced from susceptibility measurements, spin nature of iron and surface compositions of different valences of chromium and iron deduced from X-ray photoelectron spectroscopy of are presented. The wide dynamic range hydrogen sensing characteristics of CrNbO4 bulk pellets at different temperatures along with the cross-sensitivity towards NH3, NOx(NO+NO2) and PG (petroleum gas) are investigated. The preparation of Cr1-xFexNbO4 thick and thin films by screen-printing and PLD are also presented. The thick films are tested at different temperatures towards hydrogen. The n-type or p-type nature of thick films towards hydrogen with varying iron concentration in Cr1-xFexNbO4 is reported. The thin films are characterized for phase formation, morphology by XRD, SEM and AFM. XPS performed surface characterization. Electrical resistance measurements at different temperatures and preliminary experiments on hydrogen sensing are presented. The probable hydrogen sensing mechanism of CrNbO4 was revealed by X-ray photoelectron spectroscopy. The experimentally observed reduction in metal ion oxidation states upon interacting with hydrogen is best illustrated by Kröger Vink notation. Principal component analysis was applied for three different types of studies: i) The fit parameters of the transient response of CrNbO4 thick films towards hydrogen are analyzed for finding out the better feature for calibration, ii) Different thick films of CrNbO4, Cr0.5Fe0.5NbO4 and FeNbO4 operated at various temperatures for testing H2 and VOCs are analyzed for redundancy in sensor behaviour and iii) Cr0.8Fe0.2NbO4 thick films are studied for sensing H2, NH3 and their mixtures and usefulness of PCA in resolving them in PC-space. In addition, H2 and VOCs are tested at different temperatures and redundancy in temperature is deduced to construct a sensor array with a minimum number of sensors. Finally, a sensor array consisting of Cr0.8Fe0.2NbO4 thick films, operating at different temperatures is built, and qualitative discrimination of analysts in PC-space is demonstrated. Finally, the major findings of the present investigations and suggestions for future aspects of experimentation are provided
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Books on the topic "Chemical chronology"

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United States. General Accounting Office. RCED. Superfund: Chronology of efforts to resolve liability for the American Chemical Services, Inc., site. Washington, D.C. (P.O. Box 37050, Washington 20013): The Office, 1998.

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Nikolaĭ, Kolev. Letopis na izrastvaneto. [Stara Zagora]: Muzeĭ pri TKhK--Stara Zagora, 1988.

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Javād, Zamānʹzādah, and Bunyād-i Ḥifẓ-i Ās̲ār va Arzishhā-yi Difāʻ-i Muqaddas. Pizhūhishkadah-i ʻUlūm va Maʻārif-i Difāʻ-i Muqaddas, eds. Gāhʹshumār-i ḥamalāt-i shīmiyāyī-i ʻIrāq dar hasht sāl difāʻ-i muqaddas. Tihrān: Pizhūhishgāh-i ʻUlūm va Maʻārif-i Difāʻ-i Muqaddas, 2010.

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Médici, Ademir. Memória dos 70 anos: Sindicato dos Químicos do ABC. Santo André: MP Editora, 2008.

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Krehl, Peter O. K. History of shock waves, explosions and impact: A chronological and biographical reference. Berlin: Springer, 2009.

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History of shock waves, explosions and impact: A chronological and biographical reference. Berlin: Springer, 2009.

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Jung, Reinhard, ed. Punta di Zambrone I. Verlag der Österreichischen Akademie der Wissenschaften, 2021. http://dx.doi.org/10.1553/978oeaw86151.

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This monograph presents a significant portion of the scientific results of the archaeological excavations at the Bronze Age settlement site of Punta di Zambrone on the Tyrrhenian coast of Calabria (southern Italy). These excavations were conducted from 2011 to 2013 in an Italian-Austrian cooperation. The book is the first in a series dedicated to the final publication of those excavations and focuses on the later part of the settlement history (13th–12th cent. BCE). Major topics include the topography of the site (including a harbour bay), its chronology, investigations into the economic basis of the Bronze Age society and its local, regional and interregional interactions. The new data from Punta di Zambrone are evaluated in comparison with new research results from coeval sites in Italy and Greece, which forms the basis for a historical contextualization of the settlement and thus contributes to the broader reconstruction of Mediterranean history at the end of the second millennium BCE. These coeval sites are presented by their excavators or investigators. The authors conducted geophysical and bathymetric surveys as well as underwater archaeological investigations, typological analyses of artefacts, a definition of the relative and absolute chronology, archaeobotanic and archaeozoological studies, aDNA analysis, Sr isotope analyses on human and animal teeth, chemical and Pb isotope analyses on metal artefacts, provenance analyses of pottery vessels, amber and stone artefacts (from Zambrone and other sites).
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Krehl, Peter O. K. History of Shock Waves, Explosions and Impact: A Chronological and Biographical Reference. Springer, 2009.

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Krehl, Peter O. K. History of Shock Waves, Explosions and Impact: A Chronological and Biographical Reference. Springer, 2007.

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Book chapters on the topic "Chemical chronology"

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Hancock, R. G. V., S. Aufreiter, J. F. Moreau, and I. Kenyon. "Chemical Chronology of Turquoise Blue Glass Trade Beads from the Lac-Saint-Jean Region of Québec." In ACS Symposium Series, 23–36. Washington, DC: American Chemical Society, 1996. http://dx.doi.org/10.1021/bk-1996-0625.ch003.

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Edwards, Howell G. M. "Assessment of the Role of Chemical Analysis in the Holistic Attribution of Porcelains to Factory Sources, Their Characterisation and the Evaluation of Their Chronology." In Cultural Heritage Science, 399–413. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80952-2_12.

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Leclerc, Mathieu. "Lapita to Post-Lapita transition: Insights from the chemical analysis of pottery from the sites of Teouma, Mangaasi, Vao and Chachara, Vanuatu." In Debating Lapita: Distribution, Chronology, Society and Subsistence. ANU Press, 2019. http://dx.doi.org/10.22459/ta52.2019.17.

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Essefi, Elhoucine. "Thermodynamics of the External Geodynamics of Mars Water Phases and Weathering Processes." In Advances in the Modelling of Thermodynamic Systems, 1–37. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8801-7.ch001.

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This chapter studies the thermodynamic parameters of the external geodynamics of Mars. As matter of fact, the thermodynamics on Mars surface are basically controlled by the solar forcing and the internal geodynamics of the planet. In relation to the physical and chemical characteristics of water on Mars, we can build the Martian chronology. First, the Phyllosian is the phyllosilicates thermodynamics era. Second, the Theiikian is the age of sulfate thermodynamics. Third, the Siderikian, according to siderikos (ferric in Greek), is the era of anhydrous ferric oxides thermodynamics. The Martian chronology may be also built on catering. So, the meteoritic bombardment is linked to increasing disorder in the solar systems. That is to say, it is quite linked to the thermodynamics of the solar system. As direct repercussions of variable thermodynamics during the Mars history, the authors investigate the sedimentology and stratigraphy in different localities on Mars: Arabia Terra, Meridiani Planum, Terby Crater, and Gale Crater.
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Newman, Richard S. "Past as Prologue." In Love Canal. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780195374834.003.0008.

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In 1978, Love Canal resident Anne Hillis sarcastically explained the “recipe” for the chemical disaster taking shape in her neighborhood: take “approximately 16 acres” of land, add “22,000 tons of toxic wastes, mix with spring water, snow, etc …” Then, she wrote, add “human beings.” The “yield” would be “miscarriage … birth defects … suicide and death.” For people wondering just how the chemicals ended up in Love Canal in the first place, Hillis wrote that the whole saga began not in the recent past but in “the late 1800s, [when] a canal had been dug” by a starry-eyed industrialist who then abandoned the altered landscape. The groove of earth he left behind was “filled in with chemicals in the … 1940s,” covered over and forgotten. Only later would “these chemicals” migrate from the dump into the local environment. For Hillis, as for other residents, Love Canal’s troubled environmental present was a product of its toxic past. But how far back did that troubled past go? New York State health officials asserted that the “seeds” of Love Canal were sown in Niagara’s “highly industrialized” history, which stretched from the late 19th century onward. Similarly, the Niagara Gazette created a “Love Canal Chronology” that began in 1894, when entrepreneur William Love began excavating a power canal that never materialized but whose remains formed a perfect burial pit later on. An activist group pushed Love Canal’s chronology back further. Although “Love Canal became a household word in 1978,” the group claimed, “the idea for the place that was to carry the name originated in 1836,” when an engineer stamped out the route of an artificial river that would be even grander than the Erie Canal. No matter how far back they went, all of these commentators saw history as a key lens through which to view the modern Love Canal disaster. Yet few traced the area’s toxic history back to colonial times.
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Faria, Diogo F., Tiago P. Silva, M. Raquel Aires-Barros, and Ana M. Azevedo. "A Chronology of the Development of Aqueous Two-Phase Systems as a Viable Liquid-Liquid Extraction for Biological Products." In Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-409547-2.14393-8.

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PAGEL, B. E. J. "CHEMICAL EVOLUTION OF THE GALAXY: THE G-DWARF PROBLEM AND RADIOACTIVE CHRONOLOGY REVISITED TAKING ACCOUNT OF THE THICK DISK." In Cosmic Evolution, 223–28. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812810830_0053.

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Conference papers on the topic "Chemical chronology"

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Sert, Ilker. "Investigation of relation amongst the sediment chronology, heavy metal contamination and seismic activity in north Aegean Sea." In SolarPACES 2017: International Conference on Concentrating Solar Power and Chemical Energy Systems. Author(s), 2018. http://dx.doi.org/10.1063/1.5078884.

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Gubar, Julia, Andrei Sinitsyn, Sergei Urupov, and Liudmila Lbova. "Physical and chemical analysis of pigments from Kostenki 14 site." In The Earliest Paleolithic at Kostenki: Chronology, Stratigraphy, Cultural Diversity (on the 140th anniversary of archaeological research in the Kostenki-Borshchevo area). Institute for the History of Material Culture Russian Academy of Sciences, 2019. http://dx.doi.org/10.31600/978-5-9273-2863-5-2019-90-92.

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Kuznetsov, Andrey, Andrey Kuznetsov, Yury Fedorov, Yury Fedorov, Paul Fattal, and Paul Fattal. "CHRONOLOGY OF CONTEMPORARY SEDIMENTATION AND POLLUTANTS ACCUMULATION IN THE BOTTOM SEDIMENTS OF THE SEA OF AZOV." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b93832aa160.22680750.

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Bottom sediments formed in the water bodies under the technogenic impact are important environmental factors affecting water quality and hydrobiota. Usually they consist of natural and technogenic material and differ from natural formations by their morphology, chemical and lithological composition, physicochemical and biochemical properties. In the present paper we use the term “sediment layer of anthropogenic impact” to define the sediment layer containing technogenic material and/or chemical pollutants. The determination of its location in the sediment cores, its thickness and accumulation chronology is an important scientific problem. In the paper the results of layer by layer study of Cs-137, Am-241, Pb-210 specific activities as well as concentrations of petroleum components, lead and mercury in 48 sediment cores of the Sea of Azov and the Don River are examined. The sediment core layers are dated by radiological methods. In all the sediment cores the peak of Cs-137 specific activity related to the Chernobyl accident was detected. In the Sea of Azov, this peak is located in the upper sediment layer up to 10 cm thick, however, in the delta and in the near-delta part of the Don River, where the sedimentation rates are more important, it is found at 20 to 40 cm depth. Also in certain sediment cores the second peak of Cs-137 related to the global nuclear fallout of the 1960s was found. The most of petroleum components, lead and mercury quantities are concentrated in the upper sediment layer formed in the last 50 to 70 years, i.e. in the period of the most important anthropogenic pressure. So, this complex approach based on the data on the vertical distribution of technogenic radionuclides and common pollutants in the sediment cores made it possible to identify and delineate the sediment layer of high anthropogenic impact as well as to assess the duration of this impact.
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4

Kuznetsov, Andrey, Andrey Kuznetsov, Yury Fedorov, Yury Fedorov, Paul Fattal, and Paul Fattal. "CHRONOLOGY OF CONTEMPORARY SEDIMENTATION AND POLLUTANTS ACCUMULATION IN THE BOTTOM SEDIMENTS OF THE SEA OF AZOV." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b43166e16c6.

Full text
Abstract:
Bottom sediments formed in the water bodies under the technogenic impact are important environmental factors affecting water quality and hydrobiota. Usually they consist of natural and technogenic material and differ from natural formations by their morphology, chemical and lithological composition, physicochemical and biochemical properties. In the present paper we use the term “sediment layer of anthropogenic impact” to define the sediment layer containing technogenic material and/or chemical pollutants. The determination of its location in the sediment cores, its thickness and accumulation chronology is an important scientific problem. In the paper the results of layer by layer study of Cs-137, Am-241, Pb-210 specific activities as well as concentrations of petroleum components, lead and mercury in 48 sediment cores of the Sea of Azov and the Don River are examined. The sediment core layers are dated by radiological methods. In all the sediment cores the peak of Cs-137 specific activity related to the Chernobyl accident was detected. In the Sea of Azov, this peak is located in the upper sediment layer up to 10 cm thick, however, in the delta and in the near-delta part of the Don River, where the sedimentation rates are more important, it is found at 20 to 40 cm depth. Also in certain sediment cores the second peak of Cs-137 related to the global nuclear fallout of the 1960s was found. The most of petroleum components, lead and mercury quantities are concentrated in the upper sediment layer formed in the last 50 to 70 years, i.e. in the period of the most important anthropogenic pressure. So, this complex approach based on the data on the vertical distribution of technogenic radionuclides and common pollutants in the sediment cores made it possible to identify and delineate the sediment layer of high anthropogenic impact as well as to assess the duration of this impact.
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5

Абрамзон, М. Г., А. А. Завойкин, В. Д. Кузнецов, and И. А. Сапрыкина. "Late Archaic and Early Classical Coins from Excavation of Phanagoria." In Hypanis. Труды отдела классической археологии ИА РАН. Crossref, 2019. http://dx.doi.org/10.25681/iaras.2019.978-5-94375-307-7.5-27.

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В статье впервые публикуются серебряные монеты конца 6 середины 5 в. до н.э. из раскопок Фанагории. Этот нумизматический материал имеет важное значение для уточнения датировки слоев поздней архаики ранней классики на акрополе Фанагории и открытого в них целого ряда объектов жилищ, общественных зданий, фортификационных сооружений. С другой стороны, археологический контекст находок монет позволяет корректировать хронологию некоторых типов самих монет. Для этих целей особенно важны находки монет, которые происходят из разных уровней жизни общественного здания (294), построенного во второй половине 6 в. до н.э. и с перестройками дожившего до середины 5 в. до н.э. Кроме того, большое значение имеют находки монет в слое разрушения древнейших оборонительных сооружений Фанагории (679), которые погибли ок. 480 г. до н.э. К этому же времени относится клад боспорских серебряных монет, спрятанный под стеной дома (205). В целом хронология ранних серебряных монет, найденных на раскопе Верхний город , согласуется с характеристиками этого района города в период поздней архаики ранней классики (примерно до середины 5 в. до н.э.), что позволяет, опираясь на фанагорийские материалы, четко определить рубеж, отделяющий датировки более поздних монетных типов. Публикуемая коллекция представляет собой ценный источник информации о денежном обращении ранней Фанагории, а исследование химического состава металла монет дает возможность подойти к решению вопросов об источниках серебра для ранней боспорской чеканки и атрибуции ряда выпусков. The article is the first publication of the 6th first half of the 5th century B.C. silver coins from excavations at Phanagoria. These numismatic finds are most important for the verification of the date of the Late Archaic and Early Classical layers at the acropolis of Phanagoria and a number of structures discovered there dwellings, public buildings, fortifications. On the other hand, the archaeological context of numismatic finds allows us to verify the chronology of certain types of coins. Most important in this connection are coin finds from different levels of a public building (294) erected in the second half of the 6th century B.C., which existed, after a number of reconstructions, till the middle of the 5th century B.C. There are also important coin finds from the ruined fortifications of Phanagoria (679) destroyed circa 480 B.C. A hoard of Bosporan silver coins concealed under the wall of a dwelling (205) belongs to the same period. In general, the chronology of early silver coins found in the excavation site the Upper City agrees with the features of this area in the Late Archaic and Early Classic times (approximately before 450 B.C.), which allows us to define the border dating later coin types. The collection presented here is a valuable evidence for the currency in early Phanagoria, and the study of the chemical composition of the coin alloy allows us to find out the sources of silver for the Early Bosporos coins and the attribution for a number of issues.
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