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WOS:000592998800004 Pseuodoscorpions (Pseudoscorpiones) have been little studied, although they are the third largest group in the Arachnida in number of species. Pseudoscorpions have features resembling those of true scorpions. Due to their small size (the largest pseudoscorpion being no larger than 1 cm) systematic studies have proven difficult. A high-performance microscope is necessary for detailed studies. In the present study. the pseudoscorpion Atemnuspolitus (Simon, 1878) collected in Osmaniye province. Turkey. was used to describe systematic and taxonomic characters, including chelicerae, pedipalps, walking legs. and cuticular structures on appendages using stereo light microscopy and scanning electron microscopy (SEM). The study revealed characteristic features of this species. This is the first SEM study of A. politus and provides an important contribution to understanding the morphology of pseudoscorpions and demonstrates the taxonomic value of SEM micrographs. Probable functions of some of the structures observed are discussed. Scientific Research Projects Coordination Unit of Kirikkale UniversityKirikkale University [BAP/2014-34] This study is a part of our project and has been supported by the Scientific Research Projects Coordination Unit of Kirikkale University (Project number: BAP/2014-34).

YÖK Tez ID: 459270 Yalancı akrepler (Pseudoscorpiones) Arachnida sınıfı içerisinde tür sayısı bakımından üçüncü büyük gruptur. Bazı özellikleri bakımından gerçek akreplere benzeyen yalancı akrepler oldukça ilginç canlılar olup, boyu en fazla 1cm kadardır. Yalancı akrepler küçük yapılı olduklarından sistematik olarak çalışılmaları zordur. Bu canlıların çalışılması için yüksek performanslı mikroskoplara ihtiyaç duyulmaktadır. Bu çalışmada, Atemnus politus (Simon, 1878)' un tanımlanmasında kullanılabilecek önemli sistematik ve taksonomik karakterler stereo ışık mikroskobu ve taramalı elektron mikroskop (SEM) kullanılarak çalışılmıştır. Özellikle A. politus' un keliser, pedipalp, yürüme bacakları ve bunların üzerindeki kutikular yapılar SEM kullanılarak ilk defa detaylı bir şekilde incelenmiştir. Yalancı akreplerin morfolojisine önemli katkılar sağlayacağı düşünülen bu çalışmada, bazı incelenen yapıların muhtemel fonksiyonları da tartışılmıştır. Pseudoscorpions (Pseudoscorpiones) are the third largest group in the Arachnida class in terms of number of species. Pseudoscorpions that look like real scorpions in terms of some features are quite interesting creatures, and the biggest body is not bigger than 1cm. Due to the small bodies of pseudosorpions, there are difficulties in systematic studies. To study these creatures is needed for high performance microscope. In this study, the some important systematic and taxonomic characters that could be used to describe Atemnus politus (Simon, 1878) were studied using stereo light microscopy and scanning electron microscopy (SEM). In particular, the chelicerea, pedipalp, walking legs of A. politus and the cututicular structures on their appendages are investigated the first time by using SEM in the present study. This study, which is thought to provide important contributions to the morphology of pseudoscorpions, has discussed the probable functions of the some structures studied.

The rapid increase in applications of terahertz waves requires new techniques to obtain continuous wave terahertz sources. Mesa structures fabricated from high-Tc superconductor Bi2Sr2CaCu2O8+δ (Bi2212) single crystal have been observed as an intense, coherent, continuous electromagnetic wave source in the terahertz (THz) frequency region. However, in order to produce coherent radiation with high applicable power, we need large mesa structures that enter a collective electromagnetic state in which their oscillations are largely synchronized in phase. On the other hand, large mesa structures cause a heating problem. In this study, we report on the critical current density dependence of mesa area and the crystal inhomogeneity to understand heating problems in large area mesas for terahertz radiation. Since the doping dependence of Bi2212 is an important parameter, the as-grown Bi2212 crystals were heat-treated at various temperatures under vacuum conditions. We have fabricated triple mesa structures from Bi2212 single crystal using e-beam lithography and argon ion beam etching techniques with same area and with different area on the same chip. We investigated and compared characteristics of triple mesas which are on the same chip and next to each other. In this way, we searched the crystal inhomogeneity in triple mesa structures and studied the critical current density dependence of mesa area to obtain high emission power for the THz radiation. Our experimental results clearly show that the Josephson critical current density is decreasing when the area of mesa is increasing. © 2015 Elsevier Ltd. All rights reserved., TUBITAK (110T248); SANTEZ (1386.STZ.2012-1)