مقالههای Zahra Mohammadi
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
۱STRONG INTRAMOLECULAR HYDROGEN BOND IN MOLECULAR CONFORMATION of 4–AMINO–2–IMINO–3–PENTEN AND NBO STUDY
اطلاعات انتشار: اولین همایش ملی فناوری های نوین در شیمی و مهندسی شیمی، سال ۱۳۹۲
تعداد صفحات: ۴
All possible conformations of 4–amino–2–imino–3–penten (AIP) were fully optimized at MP2 and B3LYP levels with 6–31G** and 6–311++G** basis sets in order to obtain stability and relative hydrogen bond strength in these conformers. In the general structures, two of them are more stable than the other conformers and all of these levels predicted that the structure of iminoenamine1 is a global minimum. In non–hydrogen bonded systems each aminoimine conformer on average are about (2.2434 kcal\mol) more stable than iminoenamine counterpart with similar orientation. This conclusion is well supported by natural bond orbital analysis (NBO) results.<\div>
اطلاعات انتشار: پانزدهمین کنگره ملی مهندسی شیمی ایران، سال ۱۳۹۳
تعداد صفحات: ۴
In this paper, CuO\ZnO photocatalyst (CuO loadings 0–10 wt.%) was prepared and evaluated for ammonia removal from aqueous solution under solar light excitation. The photocatalytic activity of CuO\ZnO photocatalyst was highly dependent on the CuO loading, with 5 wt.% CuO achieved optimal removal of ammonia (about %89). The effect of experimental parameters like initial ammonia concentration and solution pH were studied. After 3 hours of irradiation, the maximum removal of ammonia was equal to 99% in pH=10.5. The photocatalytict degradation of ammonia is decelerating with increase initial ammonia concentration<\div>
اطلاعات انتشار: Iranian Journal of health، دوم،شماره۴، Fall ۲۰۱۵، سال ۰
تعداد صفحات: ۷
Wastewater sludge typically contains large amounts of water and organic materials; therefore, its stabilization and dewatering is of particular importance. In this study, Fenton oxidation process is used for stabilization and dewatering of sludge in the output of a wastewater treatment plant. To evaluate the sludge stabilization and dewatering, specific resistance to filtration (SRF), volatile organic compounds (VSS), total suspended solids (TSS), soluble chemical oxygen demand (SCOD) and heterotrophic bacteria were measured. During the experiment, the optimal values of various parameters such as pH (2–9), hydrogen peroxide (0.015– 0.18mol\L), Fe2+ (0.008– 0.1mol\L) and time (5 – 60 minutes) for optimum sludge dewatering and stabilization were investigated. The results showed that the highest percentages of SRF reduction and removal rates of SCOD, VSS and TSS were 99.48, 61, 42, and 41 percent respectively. These results were obtained in optimum pH 5, 0.05 mol\l Fe2+, 0.12 mol\l hydrogen peroxide, and the retention time of 15 minutes. The removal rate of heterotrophic bacteria increased with increasing dose of hydrogen peroxide, so that a removal rate of 84 percent was observed at a dose of 0.18 mol\l. In general, Fenton process can reduce volatile organic materials and chemical oxygen demand of the sludge resulting in its significant stabilization and dewatering. In general, Fenton process can reduce volatile organic materials and chemical oxygen demand of the sludge resulting in its significant stabilization and dewatering.
اطلاعات انتشار: Iranian Journal of health، سوم،شماره۳، Summer۲۰۱۶، سال ۰
تعداد صفحات: ۴
Biorhythm is one of the newest subjects in the field of cognition of mental ergonomics which can be very effective in reduction of work–related accidents or mistakes with no apparent reason. With evaluating Biorhythm individuals can intervention action to reduce job accidents carried out. Thus, the aim of this study was to determine the relationship Biorhythm and work–related accidents in the metal industry. This research is a cross–sectional and analytical–descriptive in the metal industrial Isfahan city of 120 work–related accidents during 2015. The required information was collected from available documents in HSE unit of the company biorhythm charts were drawn based on a date of accidents and participants birthdays, using natural Biorhythm Software V3.02 Conduct. Finally، the data were analyzed using spss version 20 and descriptive statistics.This study showed that the frequency of accidents in critical days and negative section of physical cycle was more than expected. Also the frequency of accidents in critical days and negative section of emotional and intellectual cycles was less than expected. Most type of injury, including cuts to 35.8 percent and the lowest type of injury was torsion with 5 percent. Most limb injury, hands and fingers with 51.7 percent and the lowest limb injury were back at 2.5 percent. Accidents outbreak in physical cycles was 38.3 percent. These 120 accidents in additionally were causing 120 loss of working days in effect accident. Most percent of loss of working days were for 20 to 30 days with of 39.2 percent. Most percent of loss of working days were for 20 to 30 days with of 39.2 percent. Due to the physical nature of the work activities in the metal industry can be stated that the study showed that in physical work activities, frequency of accidents in critical days and negative section of physical cycle in which the person is not physically ready to do the job was more than expected. Therefore, by training and increasing the knowledge of workers regarding biological cycle and its effects on mental, emotional and physical status, each person effects can make some changes to their work plans during days that they do not feel well, physically or mentally, in order to prevent the likely accidents.
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