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Articoli di riviste sul tema "Quaternary"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Dykan, Natalia. "BIOSTRATIGRAPHY OF NEOGENE AND QUATERNERY DEPOSITS (MIDDLE MIOCENE-HOLOCENE) OF THE NOUTHERN PART OF THE BLACK SEA ACCORDING TO OSTRACODS." Collection of Scientific Works of the Institute of Geological Sciences of the NAS of Ukraine 16, no. 2 (2023): 37–51. https://doi.org/10.30836/igs.2522-9753.2023.295227.

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The biostratigraphic analysis of Neogene and Quaternery deposites (Middle Miocene-Holocene) of the nouthern part of the Black Sea is based on a detailed systematic study and comprehensive analysis of fossil and recent ostracods. The regularities of the stratigraphic position of fossil ostracods in the Neogene-Quaternary deposits of the northern part of the Black Sea (the inner shelf–continental slope up to 1000 m water depth from the Danube Delta to the Taman Peninsula, geological sections of the Black Sea coast, the estuary of the northwestern Black Sea coast) were analyzed. The identificatio

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2

Pirrung, Michael, and Bernd Zolitschka. "Quaternary climate evolution." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 156, no. 4 (2005): 497–500. http://dx.doi.org/10.1127/1860-1804/2005/0156-0497.

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3

Orihuela, Johanset. "Fossil Cuban Crow <em>Corvus</em> cf. <em>nasicus</em> from a late Quaternary cave deposit in northern Matanzas, Cuba." Journal of Caribbean Ornithology 26 (April 18, 2013): 12–16. https://doi.org/10.55431/jco.2013.26.12-16.

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Abstract: Crows are rare in the Cuban fossil record. To date, there have been two reports of the Cuban crow Corvus nasicus, one from late Quaternary deposits of the San Felipe tar pits in northeastern Matanzas Province, and the other from Cuevas Blancas cave deposits in Havana Province. Here I report two additional Corvus cf. nasicus specimens from a late Quaternary cave deposit in northern Matanzas Province. This record supports a more western distribution in Matanzas during the Quaternary. Keywords: cave deposits, Corvus nasicus, Cuba, fossil, Quaternary, West Indies Resumen: Restos fósiles

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4

JUVIGNE, Etienne. "Téphrostratigraphie du Quaternaire en Belgique [Quaternary tephrostratigraphy in Belgium]." Quaternary geology of Belgium: new perspectives 2, no. 1-2 (2000): 73–87. http://dx.doi.org/10.20341/gb.2014.011.

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The main characteristics of Quaternary volcanic ash-falls found in various terrains of Belgium are put together. An exhaustive list of papers dealing with Quaternary tephrostratigraphy in Belgium is presented in an appendix.

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5

Graham, C. C., and A. Straw. "Quaternary." Geological Society, London, Memoirs 13, no. 1 (1992): 149–53. http://dx.doi.org/10.1144/gsl.mem.1992.012.01.15.

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AbstractThe Quaternary is represented widely over land areas and sea floors around Britain by sediments formed under conditions which ranged from warm temperate to glacial, humid to semi-arid, and which involved glacial, periglacial, fluvial, mass movement, marine and aeolian processes.The distribution of Quaternary sediments has been depicted on maps of the Geological Survey since the 1840s and most recently on the Ordnance Survey Quaternary Map of the United Kingdom, (1977, two sheets) at a scale of 1:625,000. The Oxford Atlas of Britain and Northern Ireland (1963) and the Atlas of Ireland (

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6

Al-Hawasy, Jamil Amir, and Mayeada Abd Alsatar Hassan. "The Optimal Classical Continuous Control Quaternary Vector of Quaternary Nonlinear Hyperbolic Boundary Value Problem." Ibn AL-Haitham Journal For Pure and Applied Sciences 35, no. 3 (2022): 161–74. http://dx.doi.org/10.30526/35.3.2833.

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This work is concerned with studying the optimal classical continuous control quaternary vector problem. It is consisted of; the quaternary nonlinear hyperbolic boundary value problem and the cost functional. At first, the weak form of the quaternary nonlinear hyperbolic boundary value problem is obtained. Then under suitable hypotheses, the existence theorem of a unique state quaternary vector solution for the weak form where the classical continuous control quaternary vector is considered known is stated and demonstrated by employing the method of Galerkin and the compactness theorem. In add

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7

van Geel, Bas, and André Aptroot. "Fossil ascomycetes in Quaternary deposits." Nova Hedwigia 82, no. 3-4 (2006): 313–29. http://dx.doi.org/10.1127/0029-5035/2006/0082-0313.

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8

Tutin, Winifred Pennington. "Quaternary Ecology." Ecology 74, no. 3 (1993): 967–68. http://dx.doi.org/10.2307/1940824.

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9

Clayton, Keith, M. A. J. Williams, D. L. Dunkerley, P. De Dekker, A. P. Kershaw, and T. Stokes. "Quaternary Environments." Geographical Journal 161, no. 2 (1995): 219. http://dx.doi.org/10.2307/3059992.

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10

Bavec, Miloš. "Quaternary Lives." Geologija 50, no. 2 (2007): 343–46. http://dx.doi.org/10.5474/geologija.2007.024.

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11

Tutin, W., L. C. K. Shane, and E. J. Cushing. "Quaternary Landscapes." Journal of Ecology 80, no. 2 (1992): 375. http://dx.doi.org/10.2307/2261028.

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12

KUMAI, Hisao. "Quaternary Stratigraphy." Quaternary Research (Daiyonki-Kenkyu) 30, no. 3 (1991): 131–40. http://dx.doi.org/10.4116/jaqua.30.131.

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13

KRISHNAN, G., and A. P. SHIVAPRASAD. "Quaternary multiplexer." International Journal of Electronics 61, no. 3 (1986): 387–96. http://dx.doi.org/10.1080/00207218608920880.

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14

Pate, F. Donald. "Quaternary Environments." Australian Archaeology 48, no. 1 (1999): 61–62. http://dx.doi.org/10.1080/03122417.1999.11681629.

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15

Spoonley, N. "Quaternary learning." Engineering Science & Education Journal 3, no. 3 (1994): 99–103. http://dx.doi.org/10.1049/esej:19940302.

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16

Fernández, Marilén, and Juan Federico Ponce. "Argentina Quaternary." Quaternary International 442 (June 2017): 1. http://dx.doi.org/10.1016/j.quaint.2017.06.013.

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17

ROUHI, MAUREEN. "QUATERNARY CARBONS." Chemical & Engineering News 79, no. 19 (2001): 53. http://dx.doi.org/10.1021/cen-v079n019.p053.

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18

Lewis, Simon G. "Quaternary Environments." Quaternary Science Reviews 20, no. 18 (2001): 1957. http://dx.doi.org/10.1016/s0277-3791(00)00153-0.

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19

van Zeist, W. "Quaternary landscapes." Palaeogeography, Palaeoclimatology, Palaeoecology 95, no. 1-2 (1992): 173–74. http://dx.doi.org/10.1016/0031-0182(92)90175-5.

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20

Andrews, John T. "Quaternary environments." Palaeogeography, Palaeoclimatology, Palaeoecology 109, no. 1 (1994): 111–12. http://dx.doi.org/10.1016/0031-0182(94)90121-x.

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21

Wayne, William J. "Quaternary environments." Geomorphology 9, no. 1 (1994): 81–82. http://dx.doi.org/10.1016/0169-555x(94)90035-3.

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22

Earl, Richard A. "Quaternary Environments." Geomorphology 36, no. 3-4 (2001): 260–61. http://dx.doi.org/10.1016/s0169-555x(00)00029-5.

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23

HJORT, CHRISTIAN. "Quaternary International." Boreas 19, no. 2 (2008): 126. http://dx.doi.org/10.1111/j.1502-3885.1990.tb00573.x.

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24

Gönnenwein, F., P. Jesinger, M. Mutterer, and al et. "Quaternary Fission." Acta Physica Hungarica A) Heavy Ion Physics 18, no. 2-4 (2003): 419–25. http://dx.doi.org/10.1556/aph.18.2003.2-4.52.

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25

Church, Michael. "Quaternary Palaeohydrology." Episodes 10, no. 1 (1987): 21–23. http://dx.doi.org/10.18814/epiiugs/1987/v10i1/009.

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26

Gibbard, Philip, and Brad Pillans. "The Quaternary." Episodes 31, no. 2 (2008): 202. http://dx.doi.org/10.18814/epiiugs/2008/v31i2/001.

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27

Meadows, Michael Edward. "Quaternary environments." Progress in Physical Geography: Earth and Environment 36, no. 4 (2012): 539–47. http://dx.doi.org/10.1177/0309133312438907.

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28

Edwards, Kevin J. "Quaternary palynology." Progress in Physical Geography: Earth and Environment 10, no. 1 (1986): 81–99. http://dx.doi.org/10.1177/030913338601000105.

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29

Rose, J. "Quaternary research." Progress in Physical Geography: Earth and Environment 10, no. 2 (1986): 275–89. http://dx.doi.org/10.1177/030913338601000210.

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30

Farrand, William R. "Quaternary Environments." Geoarchaeology 16, no. 7 (2001): 825–26. http://dx.doi.org/10.1002/gea.1022.

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31

Farrington, Orpah S. "Quaternary sediments." Quaternary Science Reviews 12, no. 7 (1993): 592–93. http://dx.doi.org/10.1016/0277-3791(93)90072-t.

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32

Bridgland, D. R. "Quaternary landscapes." Quaternary Science Reviews 12, no. 7 (1993): 594–95. http://dx.doi.org/10.1016/0277-3791(93)90074-v.

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33

Whiteman, Colin. "Quaternary environments." Quaternary Science Reviews 13, no. 4 (1994): 399–400. http://dx.doi.org/10.1016/0277-3791(94)90116-3.

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34

Raukas, Anto. "Quaternary Proceedings." Quaternary Science Reviews 13, no. 4 (1994): 400–402. http://dx.doi.org/10.1016/0277-3791(94)90118-x.

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35

KRISHNAN, G., and A. P. SHIVAPRASAD. "Quaternary adder, subtractor and multiplier using quaternary multiplexer." International Journal of Electronics 63, no. 4 (1987): 513–31. http://dx.doi.org/10.1080/00207218708547339.

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36

Chattopadhyay, Tanay. "All-optical quaternary circuits using quaternary T-gate." Optik 121, no. 19 (2010): 1784–88. http://dx.doi.org/10.1016/j.ijleo.2009.04.014.

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37

Lujan-Montelongo, Jesus A., Ping Lu, Wang Liu, and Fraser F. Fleming. "Metalated Nitriles: SNi and SNi′ Installation of Contiguous Quaternary-Tertiary and Quaternary-Quaternary Centers." Chemistry - A European Journal 19, no. 27 (2013): 8746–50. http://dx.doi.org/10.1002/chem.201301046.

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38

Shopov, Vladimir. "The Pleistocene-Holocene boundary in Black Sea shelf sediments." Geologica Balcanica 22, no. 4 (1992): 91–95. http://dx.doi.org/10.52321/geolbalc.22.4.91.

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The boundary between the Pleistocene and Holocene epoch has been referred to the beginning of a climatic event - the first retreat of the Wurm continental ice-sheet which was standardized in the sections of varve clays in Sweden and dated ca. 10 000 yrs. B. P. The chronostratigraphy of the older systems is based on data from marine sections. For the Quaternary Black Sea sediments such a climatic event has not been proposed and correspondingly the Pleistocene-Holocene boundary has not been standardized. According to the radiocarbon dates obtained from the Bulgarian Quaternary Shelf sediments su

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39

Al-Hawasy, Jamil Amir, and Wissam A. Abdul-Hussien Al-Anbaki. "The Classical Continuous Optimal Control for Quaternary Nonlinear Parabolic Boundary Value Problems with State Vector Constraints." Ibn AL-Haitham Journal For Pure and Applied Sciences 35, no. 3 (2022): 135–45. http://dx.doi.org/10.30526/35.3.2816.

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This paper aims to study the quaternary classical continuous optimal control problem consisting of the quaternary nonlinear parabolic boundary value problem, the cost function, and the equality and inequality constraints on the state and the control. Under appropriate hypotheses, it is demonstrated that the quaternary classical continuous optimal control ruling by the quaternary nonlinear parabolic boundary value problem has a quaternary classical continuous optimal control vector that satisfies the equality constraint and inequality state and control constraint. Moreover, mathematical formula

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40

Zhu, Jixiang, Xiaoyuan Zhou, Guanghui Zhang, and Qian Wang. "Quaternary Depositional Framework of the Xiong’an New Area: A 3D Geological Modeling Approach Based on Vector and Grid Integration." Sustainability 14, no. 6 (2022): 3409. http://dx.doi.org/10.3390/su14063409.

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The Quaternary stratigraphic unit is an important underground space resource for sustainable urban development. It is of great significance to understand the spatial variation characteristics of the Quaternary stratigraphic structure and its internal attributes. However, due to the openness and complexity of the Quaternary sedimentary environment, the sedimentary characteristics of Quaternary stratigraphic units are often very complex and difficult to accurately analyze. In this study, a method for analyzing Quaternary sedimentary characteristics via 3D geological modeling based on vector and

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41

Li, Bi-Jie, and Xin Sun. "Acyclic Quaternary Carbon Stereocenters through Transition-Metal-Catalyzed Enantioselective Functionalization of Unsaturated Hydrocarbons." Synthesis 54, no. 09 (2022): 2103–18. http://dx.doi.org/10.1055/s-0040-1719899.

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AbstractAcyclic quaternary carbon stereocenters occur frequently in natural products, bioactive molecules, and pharmaceutical compounds. Construction of a carbon stereogenic center attached to four different carbons with defined spatial arrangement is a daunting challenge in asymmetric catalysis. Significant efforts have been directed towards the stereoselective construction of such acyclic quaternary carbon stereocenters. In particular, catalytic generation of acyclic quaternary carbon stereocenters through functionalization of unsaturated hydrocarbons is an extremely attractive approach beca

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42

Bierbrauer, Jurgen, Stefano Marcugini, and Fernanda Pambianco. "Additive Quaternary Codes Related to Exceptional Linear Quaternary Codes." IEEE Transactions on Information Theory 66, no. 1 (2020): 273–77. http://dx.doi.org/10.1109/tit.2019.2946635.

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43

WRIGHT, H. E. "The Chinese Quaternary: Quaternary Geology and Environment of China." Science 231, no. 4740 (1986): 874. http://dx.doi.org/10.1126/science.231.4740.874-a.

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44

Bundalo, Dusanka, Zlatko Bundalo, and Branimir Ðordjevic. "Design of quaternary logic systems and circuits." Facta universitatis - series: Electronics and Energetics 18, no. 1 (2005): 45–56. http://dx.doi.org/10.2298/fuee0501045b.

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The principles and possibilities of design of fully quaternary multiple valued combinational logic systems and circuits are described and proposed in the paper. Different ways of design of fully quaternary combinational logic systems and circuits are considered and described first. Then algorithm for automated computerized design of such systems and circuits is considered and proposed. The algorithm gives possibility for synthesis and optimization of quaternary logic systems and circuits. It is applied on design of CMOS quaternary multiple valued logic systems and circuits. The algorithm inclu

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45

Naji, Fetan J., Jamil Amir Al-hawasy, and Ion Chryssoveghi. "Quaternary Boundary Optimal Control Problem Dominating by Quaternary Nonlinear Parabolic System." Al-Mustansiriyah Journal of Science 34, no. 3 (2023): 86–101. http://dx.doi.org/10.23851/mjs.v34i3.1286.

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In this paper, our purpose is to study the quaternary continuous classical boundary optimal control vector problem (QCCBOCVP) dominated by the quaternary nonlinear parabolic boundary value problem (QNLPBVP). Under suitable assumptions and with given quaternary continuous classical boundary control vector (QCCBCV), the existence theorem for a unique quaternary state vector solution (QSVS) of the weak form (WF) for the QNLPBVP is stated and demonstrated via the Method of Galerkin and the first compactness theorem. Furthermore, the continuity of the Lipchitz operator between the QSVS of the WF fo

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46

Editor. "Buried Quaternary valleys a geophysical approach." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 160, no. 3 (2009): 237–47. http://dx.doi.org/10.1127/1860-1804/2009/0160-0237.

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47

Sun, Hong Juan, Tong Jiang Peng, Hai Feng Liu, and Jin Mei Sun. "XRD Study of Hydrophlogopite Intercalated with Alkyl Quaternary Ammonium Salt." Advanced Materials Research 178 (December 2010): 330–35. http://dx.doi.org/10.4028/www.scientific.net/amr.178.330.

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Hydrophlogopite was modified with sodium and then organically intercalated with a series of alkyl quaternary ammonium salts. The organically intercalated samples were characterized by X-ray diffraction analysis (XRD) and the effect of alkyl quaternary ammonium salt on the interlayer spacing of hydrophlogopite was discussed. The results showed that if the same alkyl quaternary ammonium salt was used to intercalate hydrophlogopite, the interlayer spacing of hydrophlogopite increased gradually with the rise of the added amount of quaternary ammonium salt, and that if different quaternary ammonium

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48

Feizi, Khadijeh, and Ali Shahhoseini. "Design of Quaternary Half Adder Using Hybrid SETMOS Cell." Applied Mechanics and Materials 110-116 (October 2011): 5085–89. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.5085.

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Adder is one of the important arithmetic units in computers. In this paper, we investigate the implementation of quaternary half adder based on multiple-valued (MV) logic gates using single electron transistor (SET) and metal-oxide-semiconductor (MOS) transistor. We use hybrid SETMOS universal literal gate which has been proposed by Mahapatra and Ionesco. We apply two 4-radix inputs to the proposed quaternary half adder and obtain sum and carry outputs. The logic operation of the proposed quaternary half adder is verified by using HSPICE simulator. Moreover we compare the performance of our pr

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49

Zhang, Zhong, Min Zhang, and Ying Wang. "Quaternary amines exert anti-myocardial ischemia effects via regulation of energy metabolism and oxygen free radicals in myocardial cells in acute myocardial infarction rats." Tropical Journal of Pharmaceutical Research 21, no. 7 (2022): 1473–78. http://dx.doi.org/10.4314/tjpr.v21i7.17.

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Purpose: To investigate the effect of quaternary amines on myocardial cells of a rat model of cardiac arrest, with respect to energy generation potential and oxygen free radicals. Methods: Forty-five Sprague-Dawley (SD) rats were assigned to sham, model and quaternary amine groups (each with 15 rats). After their corresponding treatments, lectrocardiogram (ECG) monitoring of the rats in the three groups at various time periods was carried out. Serum levels of myocardial enzymes, thromboxane B2 (TXB2), prostacyclin I2 (PGI2), serum carbon monoxide (CO), and changes in endothelial carbon m

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VALENTINE, K. W. G., C. TARNOCAI, C. R. DE KIMPE, et al. "SOME ASPECTS OF QUATERNARY SOILS IN CANADA." Canadian Journal of Soil Science 67, no. 2 (1987): 221–47. http://dx.doi.org/10.4141/cjss87-021.

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This review describes some aspects of Canadian soils that are relevant to the Quaternary. It includes a description of the Quaternary Period in Canada, including a chronology of the major events that influenced soil formation, and the implication of the Quaternary to Canadian soils. The contribution of relict and buried paleosols to Quaternary stratigraphy and the reconstruction of paleoenvironments is then discussed, including some of the inherent problems. Pedologic evidence of environmental change in the southern Rocky Mountains, including tephrostratigraphy, is followed by a description, w

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