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匹配条件: “Kamiab Hesari K” ,找到相关结果约138126条。
Revision and classification of persian patient's primary cutaneous lymphoma according to WHO-EORTC classification in Razi Hospital, Tehran: a brief report
Kamiab Hesari K,Gheiasi M,Niko A,Biglarian M
Tehran University Medical Journal , 2013,
Abstract: Background: Primary cutaneous lymphoma is separated into two groups, cutaneous lymphoma (CTCL) and cutaneous B-CELL Lymphoma (CBCL). This study was performed to classify histopathologically and define demographic features of Persian patients with primary cutaneous lymphoma.Methods: Twenty hundred and thirty four patients with primary cutaneous lymphoma who have been referred to Razi Hospital in Tehran, Iran during at four year period (October 2005 to October 2009), were investigated in this study. The data were gathered by reviewing their medical records andexaminedagain extant evidence andhistology slides.Results: Among 234 Patients, the only clinical feature that could be assessed was itching. The most common involves location of disease was generalized. 189 (80.77%) cases of the patients had CTCL and 45 (19.23%) cases of the patients had CBCL. Age of patients with two lymphoma type were similar at the this time of diagnosis. Sex supremacy was with men in two groups.Conclusion: This study provides histopathologic classification and demographic data.
An optimized mixture of kiwifruit actinidin and trypsin for isolation and culture of endothelial cells from rat aorta
Hesari M,Mansouri K,Mostafaie A,Bidmeshkipour A
Tehran University Medical Journal , 2010,
Abstract: "n Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;} Background: Proteolytic enzymes, especially collagenases, are used for digestion of extracellular matrix, cell isolation and primary culture. Because of the problems in purification and low amount of collagenases in bacterial or animal sources, it is important to find new sources of the enzymes. So, in the present study actinidin, a plentiful protein in kiwifruit was purified and a mixture of actinidin and trypsin was applied to isolate rat aortic endothelial cells."n"nMethods: Aortic endothelial cells were isolated using digestion solution containing different concentrations of actinidin (from 2 to 16 mg/ml) and trypsin (0.3, 0.6, 1.2 and 2.4 mg/ml) in different times (from 15 to 90 minute). Isolated cells were cultured in DMEM culture medium. Isolated cells were identified by morphological characteristics and immunocytochemical staining; viability of separated cells was estimated by trypan blue exclusion test."n"nResults: Actinidin in concentration of 10 mg/ml with trypsin in concentration of 1.2 mg/ml for one hour could isolate rat aortic endothelial cells. In this condition the viability of cells was estimated 90%. Morphological and immunocytochemical charac-teristics confirmed the isolated cells as endothelial cells."n"nConclusion: The results showed that the mentioned mixture of actinidin and trypsin has not considerable toxic effects on separated cells and is a novel and suitable option for isolation of rat aortic endothelial cells.
Neutron Stars and the Cosmological Constant Problem
Farbod Kamiab,Niayesh Afshordi
Physics , 2011, DOI: 10.1103/PhysRevD.84.063011
Abstract: The gravitational aether theory is a modification of general relativity that decouples vacuum energy from gravity, and thus can potentially address the cosmological constant problem. The classical theory is distinguishable from general relativity only in the presence of relativistic pressure (or vorticity). Since the interior of neutron stars has high pressure and as their mass and radius can be measured observationally, they are the perfect laboratory for testing the validity of the aether theory. In this paper, we solve the equations of stellar structure for the gravitational aether theory and find the predicted mass-radius relation of non-rotating neutron stars using two different realistic proposals for the equation of state of nuclear matter. We find that the maximum neutron star mass predicted by the aether theory is 12% - 16% less than the maximum mass predicted by general relativity assuming these two equations of state. We also show that the effect of aether is similar to modifying the equation of state in general relativity. The effective pressure of the neutron star given by the aether theory at a fiducial density differs from the values given by the two nuclear equations of state to an extent that can be constrained using future gravitational wave observations of neutron stars in compact systems. This is a promising way to test the aether theory if further progress is made in constraining the equation of state of nuclear matter in densities above the nuclear saturation density.
Simultaneous Use of Entomopathogenic Fungus Beauveria bassiana and Diatomaceous Earth against the Larvae of Indian Meal Moth, Plodia interpunctella  [PDF]
Mohsen Arooni-Hesari, Reza Talaei-Hassanloui, Qodrat Sabahi
Advances in Bioscience and Biotechnology (ABB) , 2015, DOI: 10.4236/abb.2015.68052
Abstract: The suppressive ability of entomopathogenic fungus Beauveria bassiana alone and in combination with diatomaceous earth (DE) was studied against the larvae of Indian meal moth, Plodia interpunctella (Hübner) (Lep., Pyralidae). This study clearly showed that simultaneous use of B. bassiana and DE against larvae of P. interpunctella, not only could reduce the required concentration of fungal conidia or DE, but also could shorten the time need for showing insecticidal effects. The LC50 value of fungus at 7 d after treatment was 9.8 × 105 conidia mg-1 diet. Larvae showed a dose response to B. bassiana, and the addition of diatomaceous earth at 500 and 2000 ppm resulted in a significant increase in mortality. Larval mortality reached to the maximum of 28.3% and 71.7% after 7 d exposure to 500 and 2000 ppm DE concentrations, respectively. The LC50 value for B. bassiana in the presence of DE 500 ppm was 4.6 × 104 con. mg-1 diet and of DE 2000 ppm was 1.65 × 103 con. mg-1 diet. According to our results, B. bassiana and DE can be considered as two suitable candidates for integration into IPM strategy.
Consumption of the Epidermis in Malignant Melanoma
Azita Nikoo,Kambiz Kamyab Hesari
Dermatology and Cosmetic , 2011,
Abstract: Background and Aim: Consumption of the epidermis (COE) is defined as thinning of the epidermis with attenuation of the basal and suprabasal layers and loss of rete ridges in areas of direct contact with malignant melanocytes. The aim of this study was to investigate the importance of COE as an additional diagnostic criterion for malignant melanoma and to evaluate its relationship to clinicopathological findings. Methodes: The age, gender, localization of the lesion and the histopathological parameters such as tumor type, Breslow thickness, ulceration, and Clark's level were recoeded in 90 malignant melanoma cases. Results: In contrast to other studies, we found that COE was more common in tumors with an acral localization and in the acral lentiginous melanoma.Conclusion: Although COE can be used as a pathological criterion in the diagnosis of malignant melanoma, but no correlation no of COE with ulceration and other prognostic factors were found.
Teachers’ Perceptions of the Present and Optimum Status of the In-Service EFL Teacher Preparation Programs
Parviz Birjandi,Ali Derakhshan Hesari
English Language Teaching , 2010, DOI: 10.5539/elt.v3n4p47
Abstract: The present study sought the different perceptions of Iranian EFL instructors and teachers on the present and optimum status of in-service programs. A 26-item questionnaire completed by 90 participants, thirty of whom were instructors and the rest were teachers, revealed that instructors and teachers had different conceptions about these in-service programs. In the light of the results gained from questionnaire and interview, it is suggested that although most teachers were satisfied with these programs, they lacked adequate motivation to participate in these programs. Moreover, most instructors were not also satisfied with the present in-service programs, and they were looking for reforms in the educational plans and programs. The findings also suggest that, on the one hand, instructors should provide teachers with appropriate motives to enthusiastically take part in these classes, and they should feel responsible to address teachers’ weaknesses and strengths both theoretically and practically. On the other hand, teachers should seize theses opportunities with both hands to ameliorate and refresh their English knowledge. Therefore, it is suggested instructors and teachers should reconcile as far as methodological and pedagogical implications are concerned.
The mass and radii of strongly magnetized neutron stars
Farbod Kamiab,Avery E. Broderick,Niayesh Afshordi
Physics , 2015,
Abstract: It has been clear for some time now that super-critical surface magnetic fields, exceeding 4 x 10^13 G, exist on a subset of neutron stars. These magnetars may harbor interior fields many orders of magnitude larger, potentially reaching equipartition values. However, the impact of these strong fields on stellar structure has been largely ignored, potentially complicating attempts to infer the high density nuclear equation of state. Here we assess the effect of these strong magnetic fields on the mass-radius relationship of neutron stars. We employ an effective field theory model for the nuclear equation of state that includes the impact of hyperons, anomalous magnetic moments, and the physics of the crust. We consider two magnetic field geometries, bounding the likely magnitude of the impact of magnetic fields: a statistically isotropic, tangled field and a force-free configuration. In both cases even equipartition fields have at most a 30% impact on the maximum mass. However, the direction of the effect of the magnetic field depends on the geometry employed - force-free fields leading to reductions in the maximum neutron star mass and radius while tangled fields increase both - challenging the common intuition in the literature on the impact of magnetic fields.
Advanced Nonlinear Dynamic Analysis of Arch Dams considering Joints Effects
Mohammad Amin Hesari,Mohsen Ghaemian,Abolfazl Shamsai
Advances in Mechanical Engineering , 2014, DOI: 10.1155/2014/587263
Abstract: Influence of joints behavior on arch dams operation during the earthquakes is investigated. The case study is the Karun-1 double curvature arch dam with the height of 200?meters. The arch dam-foundation-reservoir systems are modeled with and without joints and estimate the effects of contraction and lift joints on stresses and displacements response histories for assessing the earthquake performance. According to nolinear dynamical analysis results, inclusion of the contraction and lift joints considerably influenced the dam response. 1. Introduction The finite element method (FEM) is a numerical method that can be used to solve different kinds of engineering problems in the stable, transient, linear, and nonlinear cases [1]. Among finite element method software programs, ABAQUS is known as one of the most precise and practicable software programs in industry and academic researches. It is used for high capability to advance nonlinear dynamic analysis such as earthquake and water wave loading on structures [2]. An arch dam is a solid concrete dam, curved upstream in plan. In addition to resisting part of the pressure of the reservoir by its own weight, it obtains a large measure of stability by transmitting the remainder of the water pressure and dynamic loads by arch action into the canyon walls. The complete necessity of high safety, economical design, complex of designing, and its application increases the importance of arch dams. Successful arch action is dependent on a unified monolithic structure and a special care must be taken in the construction of an arch dam to ensure that no structural discontinuities exist, such as open joints or cracks. By noting that one of the important parameters in dam construction projects is the earthquake, therefore, to protect against human loss or economic damages, it is necessary to have a dynamical analysis for this massive structure. Providing the safety of arc against earthquake has been noticed by many researchers and engineers. National information service for earthquake engineering (NISEE) in Berkley university is one of the most reliable centers that has a lot of scientific reports about the discussed subject. It can be noted that dynamic reservoir interaction with Monticello dam was studied by Clough et al. [3] and Study of joint opening effects on earthquake response of arch dams was done by Fenves et al. [4]. Sheng et al. [5] studied the effects of contraction joints on earthquake response of the arch dams. ?ger and Seydou [6] presented the hybrid dam displacement model to simulate the seasonal thermal
Determination and Evaluation of the Flowering Time, Pollen Quantity and Quality in The Some Male Genotypes of Pistachio (Pistacia vera L.)
F. Kamiab,A. Vesvaei,A. Ebadiand,B. Panahi
Journal of Science and Technology of Agriculture and Natural Resources , 2007,
Abstract: This research was conducted in order to select male genotypes of pistachio with good performance. The study was performed on 10 genotypes in regard to their flowering time, pollen quantity and quality. The results indicated that flowering times of P1, P2 genotypes were simultaneous with Kallehghochi; P3, P4, P5 genotypes with Ahmad Aghaii; P6 and P7 genotypes with Ohadi and P8, P9, P10 genotypes with Akbari. Inflorescence weight showed big differences between them, ranging from 4.5gr for P6 to 1.66gr for P8. The amount of pollen per inflorescence also showed big difference, ranging from 71mg for P2 and 267mg for P5. In order to determine the percentage of pollen germination, a medium consisting of sucrose, agar and boric acid was used. The percentage of pollen germination also showed big difference, ranging from 30%for P3 and P4 and 85% for P10. Stored pollen at 4°C temperature showed 30% germination after one month and 0% germination after three months. The results also indicated that the percentage of pollen germination in culture medium without boric acid was lower, compared with other treatments. The viability of pollens collected from cutting inflorescences kept in water bottle was higher than that obtained from dried inflorescences maintained in room condition.
Investigation of antibacterial, acid and bile tolerance properties of lactobacilli isolated from Koozeh cheese
Hassan Hassanzadazar,Ali Ehsani,Karim Mardani,Javad Hesari
Veterinary Research Forum , 2012,
Abstract: Lactobacillus strains are a major part of the probiotics, microflora of the intestine and of fermented dairy products, and are found in a variety of environments. The aim of this study was to find out the ability of bile and acid tolerance and antibacterial properties of the twenty eight isolates of three group lactobacilli namely Lactobacillus plantarum, Lactobacillus casei and Lactobacillus delbruki. For this purpose Twenty eight different Lactobacillus strains that isolated from Koozeh cheese as a traditional cheese were screened. The acid tolerance test was studied under pH 2.0 and 3.0 with 7.5 as control. The cell count for the acid tolerance test was obtained at an interval of 0, 1, 2 and 3 hours respectively and was pour plated on Man, Rogosa, and Sharpe (MRS) agar to be incubated at 37 °C for 24 hours. All cells were selected for bile tolerance test in MRS broth containing bile concentrations of 0% as control and 0.3% as test. Then cell counts were enumerated after 24 hours of incubation on MRS agar. Results showed twenty seven isolates did not have ability to tolerate acid and bile salts and antimicrobial activity against four indicator bacteria included Eshirichia coli, Listeria monocytogenesis, bacillus cereus, Salmonella entritidis. Only one Isolate namely Lactobacillus casei could tolerate acid and bile salt and had antibacterial activity against of L. monocytogenesis. Therefore we can consider this strain as a native probiotic but extra examinations was required.

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