Gahramanov I.,Max Planck Institute for Physics |
Gahramanov I.,Azerbaijan Academy of Sciences |
Gahramanov I.,Khazar University |
Tezgin K.,University of Connecticut
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2016
Recently, it was realized that nonperturbative instanton effects can be generated to all orders by perturbation theory around a degenerate minima via the Dunne-Ünsal relation in several quantum mechanical systems. In this work we verify the Dunne-Ünsal relation for resonance energy levels of one-dimensional polynomial anharmonic oscillators. We show that the relation is applicable to cubic and quartic anharmonic oscillators which are genus-one potentials. However for higher order (higher genus) anharmonic potentials the relation is not satisfied and is subject to a certain extension. © 2016 American Physical Society.
Abbasov R.K.,Khazar University |
Smakhtin V.U.,SRI International
Mountain Research and Development | Year: 2012
A simple environmental vulnerability assessment scheme is developed and illustrated using several streams in Azerbaijan as examples. Vulnerability of a river ecosystem is defined in terms of a combined impact of pressure factors such as water withdrawals, pollution, climate change impact on flow variability, and land use. These factors are used to measure the sensitivity of various elements/components of the system to impacts. The choice of these indicators may vary from area to area and depends on the nature of man-made and natural conditions. Each factor is characterized and quantified using a specific indicator and score. The total vulnerability score is estimated as a sum of the scores of all indicators. Most of the streams studied in Azerbaijan were found to be very vulnerable or extremely vulnerable, according to the developed scheme. The overall approach is straightforward and transparent. Conclusions are made about the vulnerability and/or resiliency of streams, to be taken into consideration when planning for water-sources development for the future. © 2012 by the authors.
Han S.,Laurentian University |
Auger C.,Laurentian University |
Appanna V.P.,Laurentian University |
Lemire J.,Laurentian University |
And 3 more authors.
Journal of Microbiological Methods | Year: 2012
As glutamate and ammonia play a pivotal role in nitrogen homeostasis, their production is mediated by various enzymes that are widespread in living organisms. Here, we report on an effective electrophoretic method to monitor these enzymes. The in gel activity visualization is based on the interaction of the products, glutamate and ammonia, with glutamate dehydrogenase (GDH, EC: 188.8.131.52) in the presence of either phenazine methosulfate (PMS) or 2,6-dichloroindophenol (DCIP) and iodonitrotetrazolium (INT). The intensity of the activity bands was dependent on the amount of proteins loaded, the incubation time and the concentration of the respective substrates. The following enzymes were readily identified: glutaminase (EC: 184.108.40.206), alanine transaminase (EC: 220.127.116.11), aspartate transaminase (EC: 18.104.22.168), glycine transaminase (EC: 22.214.171.124), ornithine oxoacid aminotransferase (EC: 126.96.36.199), and carbamoyl phosphate synthase I (EC: 188.8.131.52). The specificity of the activity band was confirmed by high pressure liquid chromatography (HPLC) following incubation of the excised band with the corresponding substrates. These bands are amenable to further molecular characterization by a variety of analytical methods. This electrophoretic technology provides a powerful tool to screen these enzymes that contribute to nitrogen homeostasis in Pseudomonas fluorescens and possibly in other microbial systems. © 2012 Elsevier B.V..
Muradkhanli L.,Khazar University |
Atabeyli B.,Qafqaz University
2012 6th International Conference on Application of Information and Communication Technologies, AICT 2012 - Proceedings | Year: 2012
This article discusses the experience of implementation of eLearning in Azerbaijan. Various factors contributing to the success and challenges of eLearning implementation are also discussed. © 2012 IEEE.
Kasaai M.R.,Khazar University
International Journal of Food Properties | Year: 2014
Water is a major component of drinking water, beverages, and most foodstuffs. In this study, an effort has been made to employ selected properties of water for: (1) evaluation of interactions of water with other food components; (2) discussion on the effects of water properties on food and beverage products; (3) applications of water properties in food technology; and (4) comparison of water properties with corresponding properties of similar substances. This study provides the following major conclusions: (i) unusual properties of water are mostly due to its high permanent dipole moment, partial ionic character of O-H covalent bonds, and extensive hydrogen bonds; (ii) different properties of many foodstuffs are strongly related to various properties of water; (iii) the properties of food products change depending on water availability and temperature; (iv) preparation of drinking water is a prerequisite for production of any safe drinks and foodstuffs; (v) water contributes important roles in quality, flavor, and shelf-life of foods; and (vi) water is used in food industries as a fluid for heat transfer; as a medium for temperature moderation in food processing; as a solvent for sugars, salts, water-soluble vitamins, and acids; as a dispersing agent for hydrophilic food components; as a dispersed phase for emulsified products; or as a reactant for several reactions in food processing. Copyright © Taylor and Francis Group, LLC.