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Search Results: 1 - 10 of 297 matches for " Somayeh mahdipour "
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Inducible clindamycin resistance in Staphylococcus aureus isolates recovered from Mashhad, Iran
Najmeh seifi,Nadia kahani,Emran askari,Somayeh mahdipour
Iranian Journal of Microbiology , 2012,
Abstract: Background and Objectives: Staphylococcus aureus is an important agent in hospital and community-associated infections, causing high morbidity and mortality. Introduction of the new antimicrobial classes for this pathogen is usually followed by the emergence of resistant strains through multiple mechanisms. For instance, resistance to clindamycin (CLI), can be constitutive or inducible. Inducible clindamycin resistance which may lead to treatment failure can simply be identified by performing D-test. The aim of this study was to determine the prevalence of inducible clindamycin resistance among Staphylococcus aureus isolates by D-test method.Materials and Methods: This was a cross-sectional study conducted on 254 non-duplicated S. aureus isolates in Imam Reza hospital of Mashhad during 2010. Susceptibility to oxacillin, cefoxitin, erythromycin and clindamycin was performed by disk agar diffusion method according to CLSI guidelines and D-shaped clindamycin susceptibility patterns where considered as D-test positive (D+).Results: Of 211 S. aureus isolates 88 (37.82%) were methicillin resistant. It was found that of 88 MRSA isolates, 78 (88.63%) were erythromycin (ERY) resistant and 46 (52.27%) were CLI resistant. ERY and CLI resistance in MSSA strains was 21.95% and 11.96% respectively. Inducible clindamycin resistance was detected in 18 (20.45%) MRSA isolates. 47(53.40%) of MRSA isolates and 9 (7.32%) of MSSA showed constitutive MLSB phenotype.Conclusion: In conclusion, we found a high prevalence of inducible clindamycin resistance phenotype in our region. We recommend that whenever clindamycin is intended for S. aureus infections, D-test should be performed to facilitate the optimal treatment of patients.Keywords: Staphylococcus aureus, clindamycin, Inducible resistance
Preliminary group classification for generalized inviscid Burger's equation
A. Mahdipour-Shirayeh
Mathematics , 2010,
Abstract: Preliminary group classification for a class of generalized inviscid Burger's equations in the general form $u_t+g(x, u)u_x = f(x, u)$ is given and additional equivalence transformations are found. Adduced results complete and essentially generalize recent works on the subject . A number of new interesting nonlinear invariant models which have non-trivial invariance algebras are obtained. The result of the work is a wide class of equations summarized in table form.
Symmetry Classification for the Nonlinear Heat Conductivity Equation
Ali Mahdipour-Shirayeh
Mathematics , 2009,
Abstract: In this investigation, symmetry properties of the nonlinear heat conductivity equations of general form $u_t = [E(x, u)u_x]_x + H(x, u)$ are studied. The point symmetry analysis of these equations is considered as well as an equivalence classification which admits an extension by one dimension of the principal Lie algebra of them. The invariant solutions of equivalence transformations and classification of the nonlinear heat conductivity equations among with additional operators are also given.
The Moderating Effect of Occupation on the Relationship between Anger and Mental Health among Extroverted and Introverted Women  [PDF]
Maryam Safara, Somayeh Keshavarz
Open Journal of Medical Psychology (OJMP) , 2015, DOI: 10.4236/ojmp.2015.44011
Abstract: This study intends to investigate the moderating effect of occupation on the associations between anger and mental health between introverted and extroverted women. Available sampling was used for collecting the data. Sample consisted of 384 women including 192 employed women and 192 housewives women (Mean age = 31.63). A self-administered questionnaire was prepared for the participants. Instruments in the present study included general health questionnaire (GHQ- 28), aggression as well as the scale that assessed respondents’ introversion and extroversion. Results showed that aggression negatively related to mental health. In contrast, there was positive relation-ship between control wrath and mental health. Meaningly, women with high level of conciliation tended to possess high mental health. Furthermore, occupation didn’t play the moderating role in the associations between anger and mental health between introverted and extroverted women.
Recycling of End of Life Concrete Fines into Hardened Cement and Clean Sand  [PDF]
Somayeh Lotfi, Peter Rem
Journal of Environmental Protection (JEP) , 2016, DOI: 10.4236/jep.2016.76083
Abstract:

One of the massive by-products of concrete to concrete recycling is the crushed concrete fines, that is often 0 - 4mm. Although the construction sector is to some extent familiar with the utilization of the recycled coarse fraction (>4 mm), at present there is no high-quality application for fines due to its moisturized and contaminated nature. Here we present an effective recycling process on lab scale to separate the cementitious powder from the sandy part in the crushed concrete fines and deliver attractive products with the minimum amount of contaminants. For this study, a lab scale Heating-Air classification system was designed and constructed. A combination of heat and air classification, resulted in a proper separation of finer fraction (0 - 0.250 mm), from coarser fractions. Heating of the materials was followed by ball milling to enhance the liberation of the cementitious fraction. Experiments were carried out at different heating temperatures and milling durations. Experimental results show that by heating the materials to 500 for 30 seconds, the required time of ball milling is diminished by a factor of three and the quality of the recycling products satisfies well the market demand. In addition, the removal of contaminants is complete at 500. The amount of CaO in the recovered finer fraction from the recycling process is comparable with the amount of CaO in low-quality limestone. By using this fraction in the cement kiln as the replacement of limestone, the release of the chemically bound CO2 could be reduced by a factor of three.


A Case of Megaloblastic Anemia with Thrombocytopenia  [PDF]
Somayeh Moghadam, Maryam Ghorbani
Open Journal of Obstetrics and Gynecology (OJOG) , 2016, DOI: 10.4236/ojog.2016.69068
Abstract: Megaloblastic anemias are a group of hematologic disorders in which abnormal DNA synthesis causes blood and bone marrow disorders. This type of anemias occurs as a result of folic acid deficiency or impaired vitamin B12 absorption. The prevalence of this type of anemia is highly variable worldwide and megaloblastic anemia caused by lack of vitamin B12 (cyanocobalamin) is rare during pregnancy [1]. In this case report, we report follow-ups conducted for a pregnant 33-year-old woman, G2, P1, with a history of previous natural childbirth who attended Kamali Hospital due to labor pain associated with severe thrombocytopenia. Although this woman was injected 10 units of PLT and also vitamin B12 (cyanocobalamin), folic acid and corticosteroids in the course of treatment, her platelet level has not yet returned to normal levels after 6 months and she is still being treated.
Effect of Conjugated Estrogen in Stress Urinary Incontinence in Women with Menopause  [PDF]
Somayeh Khanjani, Sareh Khanjani
International Journal of Clinical Medicine (IJCM) , 2017, DOI: 10.4236/ijcm.2017.86035
Abstract: Menopause is one of the natural stages of life of women that is associated with instability of vasomotor, flushing, sweating, anxiety and depression, urogenital atrophy and urinary problems. The age range of physiological event is between 48 - 55 years old. With regard to the role of genetics, nutrition and geographical conditions of the age of menopause in Iranian women is lower than and among 46 - 53 years. With the increase in life expectancy in recent decades, duration of menopause is increased and almost involved a third of the life of women so special issues of this era have had more attention. Since menopause is not the end of the life of a woman and keep her physical and mental health and problems resulting from the process of menopause such as urinary problems and incontinence will lead to improve the quality of life in this period. Many studies have tried to find a therapy for postmenopausal women with stress urinary incontinence using hormone. So this article seeks to examine the effect of conjugated estrogen in stress urinary incontinence of menopausal women with using the library method. The survey showed that by starting menopause, decreasing estrogen causes atrophy of mucosa of urogenital and the lining of the urethra and bladder, estrogen causes to maintain muscle tonicity. Also sacral nerves are also rich in estrogen receptors and by estrogen deficiency, elasticity of the urinary system decreases. Estrogen deficiency causes excitability of nerves and frequency of urine. So estrogen can increase the resistance of the urethra, bladder sensory threshold and sensitivity in Adorno in smooth muscles of the urethra and the rest of detrusor.
Galilean Classification of Curves
Mehdi Nadjafikhah,Ali Mahdipour Shirayeh
Physics , 2007,
Abstract: In this paper, we classify space-time curves up to Galilean group of transformations with Cartan's method of equivalence. As an aim, we elicit invariats from action of special Galilean group on space-time curves, that are, in fact, conservation laws in physics. We also state a necessary and sufficient condition for equivalent Galilean motions.
Affine Geometry of Space Curves
Mehdi Nadjafikhah,Ali Mahdipour Shirayeh
Mathematics , 2007,
Abstract: This paper is devoted to the complete classification of space curves under affine transformations in the view of Cartan's theorem. Spivak has introduced the method but has not found the invariants. Furthermore, for the first time, we propound a necessary and sufficient condition for the invariants. Then, we study the shapes of space curves with constant curvatures in detail and suggest their applications in physics, computer vision and image processing.
Affine Classification of n-Curves
Mehdi Nadjafikhah,Ali Mahdipour Shirayeh
Mathematics , 2007,
Abstract: Classification of curves up to affine transformation in a finite dimensional space was studied by some different methods. In this paper, we achieve the exact formulas of affine invariants via the equivalence problem and in the view of Cartan's lemma and then, state a necessary and sufficient condition for classification of n--Curves.
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