introduction acetic acid bacteria are large group of obligate aerobic gram negative bacteria with the ability to oxidize ethanol to acetic acid (1). they are widely distributed in natural habitats and classified in family acetobacteraceae. members of this family are useful in industrial production of vinegar(2). acetic acid bacteria (aab) can use substrates as glucose, ethanol, lactate or glyc...

in the first chapter we study the necessary background of structure of commutators of operators and show what the commutator of two operators on a separable hilbert space looks like. in the second chapter we study basic property of jb and jb-algebras, jc and jc-algebras. the purpose of this chapter is to describe derivations of reversible jc-algebras in term of derivations of b (h) which are we...

Background: understanding the patient expectations and perceptions of service quality is one of the requirements for improving quality of health services. The purpose of this study is to evaluate the gap between patient’s expectations and perceptions in five dimensions of service quality in hospitals affiliated with Qazvin University of Medical Sciences. Materials & Methods: This cross-s...

the purpose of this study was to investigate the relationship between teachers’ class management practices with students’ self- regulated learning and academic self-efficacy. in this study relating to the management class, three dimensions, (training management, people management and behavior management) and three style (interventionist, interactionist and non-interventionist) was considered. r...

Background & Aims: World population growth and increasing expectations for effective treatments and a generally better quality of life are putting increasing pressure on healthcare Therefore, health care is still one of the most important social and economic challenges worldwide and requires new and more advanced solutions from science and technology (1, 2). In response to such needs, since the...

The sense of place expresses a kind of emotional and interactive relationship between the man and the setting. It creates a positive relationship with the bonding between the people and the place. Sense of place is causing the positive qualitative and satisfactory reception of the place for residence. The creation of mentioned concept is important in maintaining the quality of the setting as we...

the present study has tried to accomplish an analysis of margaret atwood’s novels oryx and crake, and the year of the flood in the light of posthuman and cyborg theories. considering posthumanism as a critical reading of some notions of humanism focus of which in this thesis has been identity, new definitions for humanity and human identity are formed. haraway’s cyborg, as one possible new figu...

Background and aims: Job satisfaction is an important factor in increasing productivity, caring staff to the organization, belonging and attachment to the workplace and increasing the quantity and quality of work and good human relations in the workplace, good communication, raising spirit, love and Interest of the job. The purpose of this study was to investigate the effect of psychological ow...