Fall and rise of the Black Sea ecosystem



Comparative study on surface enhanced raman scattering activity of various silver nanostructures
Demirtaş, Özge; Bek, Alpan; Taşgın, Mehmet Emre; Department of Physics (2017)
In this work, the effect of the strong field enhancement generated in the near field of metal nanoparticles and nanowires was investigated by taking advantage of the plasmon frequencies induced by Raman laser light stimulation of free conduction electrons of these metal nanostructures. Small number of molecules that are either bound to these nanostructures or located up to a few nanometers away from the nanostructures can be detected easily through strong electromagnetic field enhancement. The aim of this w...
Spectra, vacua, and the unitarity of Lovelock gravity in D-dimensional AdS spacetimes
Sisman, Tahsin Cagri; Gullu, Ibrahim; Tekin, Bayram (2012-08-24)
We explicitly confirm the expectation that generic Lovelock gravity in D dimensions has a unitary massless spin-2 excitation around any one of its constant curvature vacua just like the cosmological Einstein gravity. The propagator of the theory reduces to that of Einstein's gravity, but scattering amplitudes must be computed with an effective Newton's constant which we provide. Tree-level unitarity imposes a single constraint on the parameters of the theory yielding a wide range of unitary region. As an ex...
Feeding, respiration and growth of ctenophore Beroe cf ovata in the low salinity conditions of the Caspian Sea
Kıdeyş, Ahmet Erkan; Anninsky, BE; Shiganova, TA; Roohi, A; Tabari, MR; Youseffan, M; Rostamiya, MT (2004-01-01)
The ctenophore Beroe cf ovata, which spontaneously entered the Black Sea in the 1990s and suppressed the previous ctenophoran invader Mnemiopsis leidyi by its predatory impact, is currently considered for intentional introduction to the Caspian Sea as well. In order to assess its impact on Mnemiopsis in the Caspian, Beroe was transported during 2002 from the Black Sea and the Bosporus to the Khazerabad laboratory (Mazandaran), on the Caspian coast of Iran, where experiments on its survival in Caspian water,...
Numerical simulation of catastrophic tsunami propagation in the Indian Ocean (December 26, 2004)
Zaitsev, AI; Kurkin, AA; Levin, BV; Pelinovsky, EN; Yalçıner, Ahmet Cevdet; Troitskaya, YI; Ermakov, SA (2005-05-01)
Assessment of the effect of mineralogy on the geotechnical parameters of clayey soils: A case study for the Orta County, Çankırı, Turkey
Akgün, Haluk; Arslan Kelam, Arzu; Oner, Gokalp; Koçkar, Mustafa Kerem (2018-11-01)
The purpose of this study is to investigate and relate the geotechnical parameters with the mineralogical properties of the Miocene and Plio-Quaternary (Pliocene to Quaternary) lacustrine and fluvial sediments, particularly clayey soils in the Orta County, cankiri. The study area is located about 110 km northeast of Ankara which is the capital city of the Republic of Turkey and Orta is a small county of cankiri. The study area is a structural depression in the northern part of the Orta plain which is filled...
Citation Formats
A. E. Kıdeyş, “Fall and rise of the Black Sea ecosystem,” SCIENCE, pp. 1482–1484, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31480.