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Gorodkov, S. S.

doi:10.1023/a:1015046411801

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…General species distribution was derived from Pape (1996, 2015), Povolný and Verves (1997), Verves & Khrokalo (2006a, b, 2009, 2015), Verves et al (2015b), Xue et al (2011, 2015) and other sources (as indicated under several species treated below). Classification of distributional ranges follows Gorodkov (1983, 1984). …”

Section: Methodsmentioning

confidence: 99%

New records of Sarcophagidae from Turkey (Diptera)

Verves¹,

Barták²,

Kubík³

et al. 2017

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Faunistic records of 68 flesh fly species are presented, and altogether, 22 species are recorded from Turkey for the first time. A further 46 species were recorded for the first time in at least one Turkish province. This paper presents the first locality data for four additional species, which were previously mentioned only generically in catalogues. One new synonym has been established, Servaisia (s. str.) rybaltschenkoi (Verves, 1977) = Blaesoxipha ataturkia Lehrer, 2008, syn. n. Two new combinations are proposed: Helicophagella (Parabellieria) dreyfusi (Lehrer, 1994), comb. n. and Helicophagella (s. str.) bellae (Lehrer, 2000), comb. n.

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Section: Methodsmentioning

confidence: 99%

New records of Sarcophagidae from Turkey (Diptera)

Verves¹,

Barták²,

Kubík³

et al. 2017

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“…Over by far the greater part of Palaearctic Asia, where such winter temperatures rule under present (non-glacial or interglacial) conditions, any further cooling associated with the glaciations can have had little biological significance -a view expressed also by Tugarinov (1935)-especially as there is reason to believe that the summer temperatures were little affected, at any rate in central Asia (Grigoriev, 1942). Also in the extreme north-east, for example off the Arctic coast of eastern Siberia, Wrangel Island (71"N., 180"E.) is believed to have been occupied by plants throughout the glacial maxima (Gorodkov, 1946-but see Saks, 1947. By contrast, during the glaciation the temperature of central Europe, around 50" N., fell so seriously that Brooks (1950) has calculated that it was actually 4" C. colder there in winter than in central Asia a t the same latitude, with catastrophic biological results.…”

Section: Meteoroloaical Consideratlonsmentioning

confidence: 99%

Ecological changes in the Palaearctic Region since the Pliocene.

Moreau¹

1955

Proceedings of the Zoological Society of London

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SUMMARY. The climatic sequence during and since the Pleistocene is summarized. For Europe, four glaciations are accepted, separated by interglacials during which the climate was more genial than the present. Moreover, each glacial and interglacial was divided into phases. Eastwards these vicissitudes diminished: only two glaciations. are discernible over most of Siberia and eastern Siberia has witnessed altogether less climatic change since the Pliocene than any other part of the Palaearctic. The changes in the level of the oceans owing to the alternate locking‐up and melting of masses of water in the ice‐caps produced fluctuations of much local importance in the coast‐lines during the Pleistocene. The vegetation of Europe during the best documented glacial phase, namely Phase 2 of the Last Glaciation, is discussed on the basis of recent maps. The most important feature is that trees were practically eliminated from Europe north of a line through the Pyrenees, the southern foot of the Alps and the Carpathians, except for a strip of wooded tundra and wooded steppe across central Russia. Deciduous species were confined to the southern end of the Iberian, Italian and Balkan peninsulas, and the coasts of Barbary and Asia Minor. These (Phase 2) conditions are dated about 70,000 years ago; they recurred to a considerable extent in Phase 3, about 25,000 years ago. Moreover, after the first post‐glacial (Allerød) advance of the trees to as far north as the Baltic, the “Younger Dryas” cold snap, only some 10,000 years ago, again eliminated most of the trees from north of the Alps. By contrast with the foregoing, at the height of the interglacials deciduous and coniferous forest respectively extended several degrees further north than at present; at least in Europe, if not in Asia, treeless tundra was probably eliminated from the arctic lowlands. At the maximum glaciation (the Third), the tree‐growth was probably not much more strictly limited in western and central Europe than it was in Phase 2 of the Last Glaciation but in European Russia tundra and cold treeless steppe extended south right to the Black Sea and the Caspian. In Palaearctic Asia the vegetational conditions during the glaciations are more obscure than in Europe; but during the Last Glaciation trees appear to have existed at least sparsely all across Siberia. Finally, Dr. Brooks, Dr. Dimbleby, Dr. D. Lack and Professor Zeuner have all been good enough to criticize this review in draft. Its final errors and omissions are of course my own responsibility.

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Absolute measurements of fast neutrons using yttrium

Roshan

Springham

Rawat

et al. 2010

Review of Scientific Instruments

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Yttrium is presented as an absolute neutron detector for pulsed neutron sources. It has high sensitivity for detecting fast neutrons. Yttrium has the property of generating a monoenergetic secondary radiation in the form of a 909 keV gamma-ray caused by inelastic neutron interaction. It was calibrated numerically using MCNPX and does not need periodic recalibration. The total yttrium efficiency for detecting 2.45 MeV neutrons was determined to be f(n) approximately 4.1x10(-4) with an uncertainty of about 0.27%. The yttrium detector was employed in the NX2 plasma focus experiments and showed the neutron yield of the order of 10(8) neutrons per discharge.

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Cited by 4 publications

References 1 publication

New records of Sarcophagidae from Turkey (Diptera)

New records of Sarcophagidae from Turkey (Diptera)

Ecological changes in the Palaearctic Region since the Pliocene.

Absolute measurements of fast neutrons using yttrium

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