نتایج جستجو برای: borotropic shift
تعداد نتایج: 136756 فیلتر نتایج به سال:
در این بخش اول این کار ابتدا از واکنش نمک دیازونیوم پاراتولوئیدین و سالیسیل آلدئید پیش-لیگاند آزو 1-(3-فرمیل-4- هیدروکسی فنیل آزو) 4- متیل بنزن (l1)تهیه شده است. واکنش تراکمی l1 با 2-آمینو تیوفنول منجربه فرآورده باز شیف5-(4-متیل فنیل-1-دی آزنیل)-2-{[(2-سولفانیل فنیل)ایمینو] متیل}-1-بنزنول(h2l) گردید. فرمول مولکولی این لیگاند c20h17n3os می باشد. در مرحله بعد از واکنش این لیگاند با نمک هایcd(no3)...
in today’s advanced world resulting from the improvement of technology, societies tend to encounter a large number of problems and accidents. as we know, university’s security personnel are classified as shift workers and are exposed to health disturbing factors. the aim of this study was investigation of shift work disorders among security personnel of the hospitals affiliated to shiraz univer...
Background: nowadays, the role of occupational stressors in the creation of problems, diseases, physical and mental disabilities, and its costs especially in high standard and safety- sensitive jobs is obvious. Shift work is a factor which may increase job stress. Therefore, this study was conducted to identify the relationship between shift work and occupational stress among urban taxi driver...
Background and Objectives: Shift working has the potential to negatively influence the quality of work life among nurses. The purpose of this study was to investigate the outbreak of shift work-related disorders and the relationship between shift work and job satisfaction in nurses of Ilam University’s subsidiary hospitals, in order to identify potential strategies for decreasing risk of health...
Background and Objectives: Shift work could threaten health in the long term. The present research aimed to assess the association between shift work and body mass index (BMI) using the multilevel (hierarchical) model during a particular period of time. Methods: The data of this longitudinal study were collected from a sample of Esfahan’s Mobarakeh steel and Polyacryl companies personnel durin...
background: health workers ability to provide high quality care can be adversely affected by many factors such as sleep deprivation associated with shift work. the aim of this study was to compare sleep disorders among shift workers and non-shift workers in kermanshah hospital (2005) methods: at first, demographic information of the participants were gathered. 653 volunteers were divided into t...
background: today, obesity is considered as a health problem that increases the risk of some diseases. therefore, identifying the effective factors on obesity is of great importance. shift work is one of the indicators for increased risk of obesity in society and also shift work may cause various health problems for workers in military organizations. the current study aimed to investigate the r...
abstract background: irregular working hours, including night work and shift work, have been found to be associated with alteration in various levels of biochemical factors. and some studies have showed association between shift work and blood biochemical disturbances in blood. in this epidemiological study we investigated, whether regular schedule of working hours can minimize the associated...
conclusions the study findings highlight the importance of the mental aspect of fatigue in this working group. these results have possible implications for workers’ health and well-being and for the design of shift work systems, for industrial workers. background shift work is a well-recognized occupational health hazard in both industrialized and industrially developing countries. prolonged wo...
background: occupational asthma (oa) is the most common occupational lung disease in developed countries. one of the causative agents is metal fume that may be encountered in steel industries. screening for the oa is mainly performed by questionnaire but in our country spirometry is used more commonly. objective: to compare the diagnostic value of the venables standardized respiratory questionn...
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