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Search Results: 1 - 10 of 2665 matches for " Mehdi Goodarzi "
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Identification of Bifidobacterium animalis, Bifidobacterium adolescentis and Bifidobacterium bifidum from Stool of Children and Detection of Their Antibacterial Properties  [PDF]
Mansour Amin, Ahmad Farajzadeh Sheikh, Hamed Goodarzi, Mehdi Sormeh
Advances in Infectious Diseases (AID) , 2013, DOI: 10.4236/aid.2013.33029
Abstract:

Introduction and Objective: The genus Bifidobacterium can generally be found in quantity in the habitats such as human and animal gastrointestinal tract, dental caries, vagina and oral cavity. The aim of this study was to isolate Bifidobacterium from stool and determine their inhibitory effect against some pathogens. Materials and Methods: 130 samples were collected by wet swabs and kept in sterile tubes containing MRS broth media. And Bifidobacterium isolated from stool was enriched in Man-Rogosa-Sharpe medium (MRS) broth and isolated by growing on MRS agar medium and characterized by phenotypic characteristics and PCR technique at genus and species levels. The antimicrobial substance was extracted from ethyl acetate solvent and the antimicrobial activity against some pathogenic bacteria, such as Salmonella typhi and Shigella sonnei, were investigated. Results: Eleven Bifidobacterium bifidum and four Bifidobacterium adolescentis, which were isolated from fresh stool, were identified by PCR. Antimicrobial substance from MRS broth medium was extracted. This antimicrobial compound showed a potent inhibitory activity against four tested bacteria. These bacteria produced acetic acid and lactic acid as inhibitory substances that were different from bacteriocins. Conclusion: Fresh stool may be used as a source of antimicrobial lactic acids bacteria, Bifidobacterium bifidum and adolescentis as two probiotics can establish themselves in gut and urogenital tract to prevent the human body from adverse effects of pathogens.

Analytical and Numerical Solutions of Vapor Flow in a Flat Plate Heat Pipe
Mohsen GOODARZI,Mohammad Mehdi RASHIDI,Amir BASIRIPARSA
Walailak Journal of Science and Technology , 2012, DOI: 10.2004/vol10iss1ppaccepted
Abstract: In this paper, the optimal homotopy analysis method (OHAM) and differential transform method (DTM) were applied to solve the problem of 2D vapor flow in flat plate heat pipes. The governing partial differential equations for this problem were reduced to a non-linear ordinary differential equation, and then non-dimensional velocity profiles and axial pressure distributions along the entire length of the heat pipe were obtained using homotopy analysis, differential transform, and numerical fourth-order Runge-Kutta methods. The reliability of the two analytical methods was examined by comparing the analytical results with numerical ones. A brief discussion about the advantages of the two applied analytical methods relative to each other is presented. Furthermore, the effects of the Reynolds number and the ratio of condenser to evaporator lengths on the flow variables were discussed. Graphical abstract
Executive Dysfunction in Children and adolescents with Attention Deficit Hyperactivity Disorder (ADHD)
Mehdi Tehrani-Doost,Reza Rad Goodarzi,Javad Alaghband-Rad
Iranian Journal of Psychiatry , 2007,
Abstract: "nObjective: The purpose of this study is to compare the executive functions children and adolescents who suffer from attention deficit hyperactivity disorder "n(ADHD) with normal children. "nMethod: Twenty children with ADHD were compared to 19 healthy children terms of some executive functions using the computerized version of Tower London, Continuous Performance Test (CPT), and Stroop Color Test. "nResults: In "Tower of London", the performance of children with ADHD was "nworse than normal children (p<0.05). In Continuous Performance Test, the "ncommission errors in children with ADHD were significantly more than the "nnormal group (p<0.01). In Stroop Test, the time spent to name the colors was "nsignificantly higher in ADHD group. A significant correlation was also found "nbetween the performance of children on Tower of London and CPT (P<0.05). "nConclusions: This study demonstrates that children and adolescents who "nsuffer from ADHD have some impairment of executive functions, particularly "nplanning and inhibition to response, but not in attention.
Evaluation of Effect of Peppermint as a New Preventive Method for Milk Fever and Subclinical Hypocalcaemia in Transition Holstein Cows
Mehdi Goodarzi,Mohammad Sadegh Safaee Firouzabadi,Mohammad Mahdi Zarezadeh Mehrizi,Mohsen Jafarian
International Journal of Animal and Veterinary Advances , 2012,
Abstract: Milk fever and subclinical hypocalcaemia are the most important macromineral disorders that affect transition dairy cows. Feeding peppermint to dairy cattle due to physiological or pharmacological functions may effect rumen fermentation and digestibility. Thus, in the present study, peppermint was tested for its effects upon serum calcium and urine pH levels in transition Holstein cows. Twenty dairy cattle (the last 3 weeks prepartum) were divided into 2 groups. Group 1 (control) treated with no peppermint and group 2 (treatment) treated with peppermint. To determine serum calcium and urine pH levels, blood and urine were taken in start of experiment, after 15 days adaptation period with the peppermint being mixed with concentrate and 12 h after calving in second milking. Serum calcium and urine pH levels between control group and treatment group were not significantly different (p>0.05) in start of experiment, but their levels after 15 days adaptation period and 12 h after calving were significant (p<0.05). In treatment group serum calcium and urine pH difference between before treatment and after treatment in three different times were different significantly (p<0.05). According to these results, it can be concluded that peppermint has a great potential as a new preventive method for milk fever and subclinical hypocalcaemia by inducing mild metabolic acidosis or any unknown mechanism.
Educational Advisor System Implemented by Web-Based Fuzzy Expert Systems  [PDF]
Mahdi Hassani Goodarzi, Vahid Rafe
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.57058
Abstract: Using of the Internet technology and the field of Fuzzy expert systems has proposed new branches of sharing and distributing knowledge. However, there has been a general lack of investigation in the area of web-based Fuzzy expert systems (FES). In this paper the issues associated with the design, development, and use of web-based FES from a standpoint of the benefits and challenges of developing and using them. The original theory and concepts in conventional FES were reviewed and a knowledge engineering framework for developing them was revisited. Student in an educational place need an educational advisor for solve problems. Some of educational circulars order changing because advisor must update information away. The student's request is linguistic and crisp Expert System cannot solve problems completely. In my approach we build Web-Based Fuzzy Expert System for Student Education Advisor (FES-SEA) and stays in university portal. This system implemented with ASP.NET, SQL-SERVER 2008.
Psychiatric and family functioning in children with leukemia and their parents
Goodarzi A
Tehran University Medical Journal , 1999,
Abstract: The present study reports data from a cross-sectional investigation of the psychiatric and psychosocial functioning of 55 children diagnosed with acute lymphocytic leukemia and their families at three points in time: diagnosis (newly diagnosed), 1 year postdiagnosis, and 1 year after the completion of chemotherapy (offtherapy). Results reveal minimal psychopathology in these children and their parents based on self-and informantreports and structured diagnostic interviews. These families appear to be functioning adequately and report more family cohesiveness and marital satisfaction after chemotherapy was completed. Coping strategies commonly used by children and their parents include problem solving, a positive outlook, and good communication. Implications for psychiatric consultation are presented.
Optimizing The Application of SO2 in Apricot Drying
F Goodarzi
Journal of Science and Technology of Agriculture and Natural Resources , 2009,
Abstract: To optimize the use of sulfur in drying of apricot, four following treatments including: sulfiting and drying, sulfiting- blanching and drying, blanching- sulfiting and drying, and finally sulfiting- drying to % 50 of initial moisture- blanching and finish drying were studied. The levels of sulfur addition were from 0 to 1500 ppm, SO2 and drying was carried out at 50 to 74 °C. The quality of dried apricots was judged by extent of browning development and hardness determination. A response surface statistical design was applied to evaluate the quality of slabs and to determine optimum drying conditions. The results showed that sulfite was the major factor in controlling dried apricot quality. At present of sulfur, the role of temperature can be neglected. The amount of used sulfite has no significant effect on drying time of apricots. Blanching reduced drying time of product significantly. By increasing the drying temperature, loss percentage of SO2 was reduced for all treatments. Blanching and then sulfiting, increased loss in residual sulfur of products significantly. Application of sulfiting– drying method, using 900 ppm of SO2 at 50 to 68 °C was found to be the best treatment because of production of slabs whit average hardness and color texture equal to 1.44 N/m2 and 0.07 Od respectively.
Effect of Post-Harvest Application of Calcium on Quality and Shelf Life of Strawberry
F Goodarzi
Journal of Science and Technology of Agriculture and Natural Resources , 2009,
Abstract: Because of its tenderness, long distance between field and consumer locations and unsuitable condition of transportation, 30 – 40 percent of strawberry fruits is wasted during the transportation between field to markets. One of the recommended ways for cutting down the wastes of strawberry is application of calcium salts after harvest stage to increase the content of Ca2+ in fruit flesh. For this reason, the selected fruits were treated by immersing them in 0, 25, 50 and or 75 mmol/lit concentrations of CaSO4, CaCl2 or Ca(NO3)2 for 4 min. After drying in atmospheric tempetature, fruits were stored at 5°C for 5 and for 10 days. To evaluate the effect of calcium solutions on fruit quality, some quantitative and qualitative tests were carried out on them. The results showed that by increasing the concentration of calcium salts, the amount of acidity and calcium of fruits is significantly increased, but the percentage of mouldy fruits is decreased. In most cases, the 50 and 75 mmol /lit concentrations of CaSO4 showed similar effects. Among the different calcium solutions, Ca(NO3)2 had the best effect on improvement of fruit quality, such as increasing the calcium and firmness of fruit , but CaSo4 prohibited the moulding of fruits better than other solutions. By increasing the period of storage from 5 to 10 days, the amount of acidity and firmness decreased significantly, while mouldness percentage increased. The organoleptic test showed that when the concentration of CaCl2 and Ca(NO3)2 solutions is increased, the acceptability of treated samples is decreased by consumers. Because of the bitter taste, the least score was given to the samples treated by 75 mmol/lit concentration of Ca (NO3)2 solution. The panelists didn’t recognize any difference in taste between control and samples treated by 25 mmol/lit concentration of CaSO4 and CaCl2 solutions. None of the treatments showed initial attributes (tenderness and shape) of fruits after storage period. This method isn't recommended to increase the strawberrys' shelf life for home use, but it can be used for the ones which are to be consumed in food processing industries.
Convex Hull of Face Vectors of Colored Complexes
Afshin Goodarzi
Mathematics , 2012,
Abstract: In this paper we verify a conjecture by Kozlov (Discrete Comput Geom 18 (1997) 421--431), which describes the convex hull of the set of face vectors of $r$-colorable complexes on $n$ vertices. As part of the proof we derive a generalization of Tur\'{a}n's graph theorem.
Clique Vectors of $k$-Connected Chordal Graphs
Afshin Goodarzi
Mathematics , 2014,
Abstract: The clique vector $\mathfrak{c}(G)$ of a graph $G$ is the sequence $(c_1, c_2, \ldots,c_d)$ in $\mathbb{N}^d$, where $c_i$ is the number of cliques in $G$ with $i$ vertices and $d$ is the largest cardinality of a clique in $G$. In this note, we use tools from commutative algebra to characterize all possible clique vectors of $k$-connected chordal graphs.
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