Dünyada yaklaşık 332,5 milyon kübik mil sudan oluşan su kaynaklarının %96’sı okyanus ve denizleri içeren tuzlu kaynaklarıdır. Geriye kalan %4’lük tatlı %68’i buzullarda sıkışmış halde bulunurken, %30’u ise toprak altı suyu olarak yer almaktadır. Kullanılabilir doğal nedenlerle bu kadar az olmasının yanı sıra; sanayileşme kentleşmenin yarattığı çevre kirliliği, sera gazı emisyonlarının sürekli ö...

background noise exposure is known as a risk factor for hearing loss and one of its effects is noise-induced stress. cortisol as a stress hormone is used in noise-induced stress assessments. objectives the aim of this study was to measure and compare saliva cortisol concentrations in the morning and evening in normal work day and rest day in both case and control groups and to assess the associ...

This paper examines the experience of eustress, using Selye’s (1964, 1987) concept of “good stress”.Usually stress is considered and researched as a negative experience, but we suggest that learning to respond to negative stress and demands with positive emotions and behaviours is likely to increase positive drive, creativity and courage (Le Fevre, Matheny &Kolt, 2003; Selye 1964; 1987). Howeve...

Oxidative stress (OS) has been implicated as one of the major underlying mechanisms behind many acute and chronic diseases. However, the measurement of free radicals or their end products is complicated. Isoprostanes, derived from the non-enzymatic peroxidation of arachidonic acid are now considered to be reliable biomarkers of oxidant stress in the human body. Isoprostanes are involved in many...

introduction: the term glaucoma refers to a group of diseases that have a characteristic optic neuropathy with associated visual field loss in common. intraocular pressure has been considered to be the only causal factor for glaucoma and the only factor that can be manipulated to alter the course of the disease. but considering high intraocular pressure as the only factor responsible for glauco...

Magnetic shape memory properties of Ni-Mn-Ga single crystals were characterized by measurement of stress-induced martensite reorientation under constant magnetic fields. Also magnetic field-induced strain as a function of the applied magnetic field under different constant compressive stress levels has been investigated. All the experiments were performed at room temperature in which the sample...