23 research outputs found
The Role of Serotonin in Aggression and Impulsiveness
Serotonin is a neuromodulator that has a critical role on the regulation of essential events in neuronal and glial development, such as cell proliferation, differentiation, migration, apoptosis, and synaptogenesis, and acts as a developmental signal. It has been known that a serotonergic system is associated with many psychiatric disorders. The serotonergic system also predominates on the etiopathogenesis of two important endophenotypes: impulsivity and aggression. Impulsiveness is defined as personality trait and an implusive temperament is associated with clinical conditions such as pathological gambling, eating disorders, and borderline personality disorder as well as being a risk factor for self‐harm, suicide, and emotional liability. Aggression is not a personality trait like impulsivity, but it is the behavior of harm or injury to others. Besides being a natural human behavior toward survival, aggression can be harmful to the individual and the community when it is constant and excessive. In this chapter, we aimed to review the role of the serotonergic system on impulsivity and aggression, which are two important endophenotypes that identified in many psychiatric disorders
Archaeo-gemmological investigation of gemstone artefacts (seal stones and ceremonial stones) and ancient jewelleries mounted gemstones in the İzmir Archaeological Museum
İzmir Arkeoloji Müzesi'nde bulunan ve henüz büyük kısmı saklı tutulan Anadolu medeniyetlerine ait yaklaşık iki yüz otuz sekiz adet süstaşı ürünler (mühür taşları ve törensel taşlar) ve süstaşlı mücevherler, tahripsiz ve zarar vermeyen gemolojiksel inceleme yöntemleri (hidrostatik terazi, refraktometre, gemoloji mikroskopları ve UV lamb) kullanılarak kimliklendirilmişlerdir. Antik süstaşı ürünlerin işlendiği dönemlerin ve özelliklerinin ortaya çıkartılması ile, gerek arkeolojik kazılarda bulunan gerekse de müzelere verilmek üzere getirilen süstaşlı mücevherlerin tarihlendirilmesi ve gerçek değerinin tespit edilebilmesi mümkün olabilecektir. Ayrıca bu çalışma göstermektedir ki, antik dönem süstaşlarının ve süstaşlı mücevherlerin konservasyon işlemleri, bunların gemolojik özellikleri dikkate alınmadığı takdirde, birçok objenin hatalı yorumlanmasıyla sonuçlanmıştır. Bu nedenle, arkeo-gemoloji ve arkeo-gemolog gelecekte müzelerin iki yeni kavramı olacaktır. About two hundred thirty eight gemstone artefacts (seal gemstones and ceremonial stones) and jewelleries with gemstones in the İzmir Archaeology Museum, which they belong to the Anatolian cavitations and most of them have been kept in the store, are identified using non-destructive and non-invasive gemmological investigation methods (hydrostatic balance, refractometre, gemmology microscope, and UV lamb). With being revealed the periods and features to be cut and polished of the ancient gemstone artefacts, the dating and the establishing of exact values of the jewelleries with gemstones which are both obtained in the archaeological excavations and come to the museum for giving can be possible. In addition, this study show that conservation process of the ancient gemstones and jewelleries with gemstones, when it is not considered the gemmological features of them, results to be mistake the evaluation of many objects. Therefore, archaeo-gemmology and archaeo-gemmologist will be two new elements for the museums soon