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匹配条件: “Mohammad HOJATI” ,找到相关结果约12645条。
Mohammad HOJATI,Mohammad ABBASI
Journal of Special Education and Rehabilitation , 2013, DOI: 10.2478/v10215-011-0034-2
Abstract: Learning disability is a life-long condition that can affect academic functioning, everyday life and social life. In multiple areas, academic and other, students with LD often underachieve, and often with pervasive negative consequences. This study compared self-efficacy and hope in 30 elementary school (sixth grade) children with learning disabilities (LD) and 30 their peers without LD. An ex post facto design was used. Statistical population comprised of all students in elementary schools (sixth grade) in, Harsin, Iran, during the 2012-2013 academic year. Students with learning disabilities were randomly selected. The students with LD had been diagnosed by Colorado Learning Difficulties Questionnaire (CLDQ). The students completed the Wechsler Memory Scale, General Self-Efficacy Scale, and Children’s Hope Scale. Data were analyzed using analysis of variance. The Statistical Package for Social Sciences (SPSS 20) was used for computing descriptive statistics and analysis of variance. Differences were found between the groups on the self-efficacy and hope. The study demon-strated the important role of self-efficacy and hope for students with LD.
The Effects of Ethanol and Strontium on Growth and Development of Two-Cell Arrested Mouse Embryos
Mohammad Reza Darabi,Abdolhossein Shiravi,Vida Hojati
International Journal of Fertility & Sterility , 2012,
Abstract: Background: Arresting at a certain stage of development like the two-cell stage could be one of the causes of infertility. The aim of this study is to evaluate the effects of ethanol and strontium on growth and development of mice embryos arrested at the two-cell stage.Materials and Methods: In this experimental study, female mice were coupled with a male following superovulation. Positive vaginal plug mice were sacrificed 48 hours after human chorionic gonadotropin (hCG) injection. Two-cell embryos were transferred to M16 medium and divided to four groups. The first control group was incubated without any exposure to low temperatures. Groups 2, 3 and 4 were exposed to 4°C for 24 hours. The second control group was incubated immediately, while the third and fourth groups were exposed to 10 mM strontium for five minutes and 0.1% ethanol for a further five minutes. Growth rate and developmental parameters of embryos were analyzed by one-way ANOVA. The significant difference between the groups was determined by Post Hoc.Results: The data shows that developmental rate is decreased significantly by 4°C exposure. The mean percentage of degenerated embryo was significantly different between groups but the mean cleavage rate was not significantly different. The mean percent of morula, blastocyst and hatched blastocyst formation were significantly different between groups during a 120 hours study post hCG injection.Conclusion: The effect of strontium and ethanol on arrested two-cell embryos had no significant effect on the mean percentage of morula, but ethanol treatment significantly increased the percentage of blastocyst and hatched blastocyst formation compared to strontium.
Enzyme Activities and Microbial Biomass Carbon in a Soil Amended with Organic and Inorganic Fertilizers
Saeid Hojati,Farshid Nourbakhsh
Journal of Agronomy , 2006,
Abstract: Soil equilibrium can easily be disturbed by unsuitable agricultural practices especially in arid and semi-arid regions which are prone to organic matter losses. A comparative study was conducted to investigate the effects of cow manure, sewage sludge (25 and 100 mg ha-1) and chemical fertilizer (250 kg ha-1 of ammonium phosphate and urea) application on Microbial Biomass C (MBC) and enzyme activities in a calcareous soil cropped to corn. Results illustrated that applications of sewage sludge and cow manure increased soil organic C, total N, MBC, L-Glutaminase, alkaline phosphatase, arylsulfatase, β-glucosidase activities and corn yield compared to control and chemical fertilizer treatments. An increasing trend was observed in all studied parameters, as rates of application increased. Manure-amended soils showed higher alkaline phosphatase, arylsulfatase and β-glucosidase activities than that of sewage sludge treatment. Results obtained by discriminant analysis indicated that rates of application were more effective to create discrimination among treatments. It was also understood that β-glucosidase activity was the most useful variable for discriminating among fertilizer types. This study showed that MBC and enzyme activities were significantly correlated with SOC. Significant correlations were also observed between enzyme activities and MBC.
The Female Reproductive Cycle of the Bedriaga Plate-Tailed Gecko, Teratoscincus bedriagai (Sauria: Gekkonidae) in Iran
Fatemeh Mojibi,Vida Hojati
International Journal of Zoology , 2014, DOI: 10.1155/2014/782641
Abstract: The Bedriaga Plate-tailed Gecko, Teratoscincus bedriagai Nikolsky, 1900, is distributed in the northern and eastern desert basins of the Central Plateau of Iran, Sistan, and the desert regions of southern Afghanistan. Iranian specimens are believed to be rare in collections. In this study, the reproductive cycle of this species has been investigated through focusing on oogenesis from 5 April to 5 August, 2013. Generally, 15 adult females were collected by hand at midnight from southern parts of Damghan County, situated in Semnan Province of Iran. Ovaries were removed and processed for the purpose of histological and morphometric studies. The results revealed that oocyte growth starts in early April and terminates in late July. Moreover, mating commences in spring, especially at the beginning of May, with oviposition occurring from late May to late July. Approximately, 1 to 2 eggs are laid by females per clutch with the possibility of producing a secondary clutch later in the season. The maximum reproductive activity takes place in May and continues with a decreasing trend in June and more reduction in July and finally ends in August. No significant difference was observed between right and left side of reproductive system. Therefore, oogenesis occurs from April to July, while T. bedriagai follows an oogenic cycle typical for temperate species. 1. Introduction Lizards show three general types of reproductive cycles: constant, associated, and dissociated [1]. A constant reproductive cycle is exhibited by tropical lizards in which gonads are active almost year-round [2]. Associated and dissociated reproductive cycles are characterized by the presence of a discontinuous mating season. In associated type, gonadal activity increases immediately prior to the mating period in both males and females simultaneously and females have no need to store sperm due to its availability during the reproductive season. This cycle is common in species that live in predictable environments such as in the temperate zones [3], the subtropics [4], and the seasonal tropics [5]. In the dissociated type, gonadal activity is low during the mating period and peaks during the nonmating period and male gonadal activity is shorter than that of females and sperm is stored by the female genital system for some months with fertilization occurring later [6]. A dissociated cycle is typically observed in species that live in temperate zones and have a brief mating season [7]. The Gekkota are an infraorder of reptiles, comprising all geckos and the limbless Pygopodidae. Gekkota are a suborder
The Diet and Sexual Differences of the Caspian Bent-Toed Gecko, Tenuidactylus caspius (Squamata: Gekkonidae), in Northern Iran
Vida Hojati,Reza Babaei Savasari
International Journal of Zoology , 2014, DOI: 10.1155/2014/698216
Abstract: The Caspian bent-toed gecko, Tenuidactylus caspius, is one of the most common nocturnal lizards of Iran with widespread distribution especially in the northern provinces. This research was done in order to study the diet and sexual dimorphism of this species in Sari County from 5 May to 20 October. During this research, 40 specimens of them including 20 males and 20 females were studied for diet and 140 specimens including 70 adult males and 70 adult females were studied for sexual dimorphism. Prey items identified were insects that belong to 15 species of 8 families and 6 orders. The most common prey items were Culex pipiens and Musca domestica. There is no significant difference between diets of males and females. Results show that the adult males in addition of having the apparent femoral and preanal pores are heavier than females and have larger body, head, and tail length. 1. Introduction Sexual dimorphism in size, morphology, coloration, and aggression is widespread among lizard species and may result from three mechanisms: sexual selection, reproductive role mechanisms (e.g., fecundity selection), and intersexual food competition [1, 2]. Variation among male lizards in sizes of bodies, heads, and other structures in coloration and in courtship and aggression displays may be related to differences among males in reproductive success [3]. Larger male lizards win male-male aggressive encounters and gain greater access to females or they are chosen as mates either because of their size or characteristic that is correlated with large size [4]. However, sexual body size dimorphism may have causes other than sexual selection. The differential mortality between the sexes may cause an apparent size dimorphism because of unequal age of the sexes [5]. Males moving out in search of females must have a high rate of encounter with predators, so large body size of males would enhance their changes of evading some predators and of being too large for other. Two other possible reasons for males being larger than females are intersexual food resource partitioning [6] and forcible insemination of females [7]. The Caspian bent-toed gecko, Tenuidactylus caspius, is one of the most common lizards in northern Iran. This species is nocturnal and oviparous. Recently, some studies have been done on sexual dimorphism of lizards of Iran [8, 9]. Also, there is no work on the diet of this species. This study was conducted to provide information on sexual dimorphism and food habits of T. caspius in northern Iran. 2. Material and Methods 2.1. Study Area The study locality was
Hydatid Cyst Disease in Khozestan Province, Iran
MH Sarmast, H Javaherizadeh, M Hojati
East and Central African Journal of Surgery , 2011,
Abstract: Background: Hydatid cyst is endemic in Iran. Liver is the most common organ involved. Lung, brain, and other organs may also be involved. The aim of this study was to evaluate the clinical manifestation and complications of hydatid cyst disease in Khuzestan, Iran. Methods: This was a retrospective study. The study population included both children and adults admitted in Imam Khomeini hospital over a 5-year period starting from 2001. In this study, age, sex, place of residency, fever, jaundice were asked and recorded for each cases. data was analyzed by SPSS ver 16.0 (Chicago, IL,USA). T-test and Chi-square were used for comparison. Results: Of the 289 cases, 44.6% were males and 55.4% were females. Mean±SD of age was 41.6±7.59. Liver and lung involvements were seen in 174 (60.2%) and 97(33.7%) of cases respectively. The majority (64%) of all cases were from rural area. The recurrence rate was 19.3%. Frequency of clinical manifestion in descending order included abdominal pain (58.8%), dyspnea (32.9%), cough (23.9%), jaundice (22.9%), and fever (21.1%). The mean age in patients with jaundice was significantly higher than patients without jaundice (P<0.001). Icterus was more common in male cases than female cases (p=0.024). Dyspnea was more common in female cases (P=0.0024). There was a higher incidence of dyspnea in patients with dull abdominal pain than cases without abdominal pain (P<0.001). Conclusion: Most of the cases had liver and or lung involvement. Jaundice was more common in males than in females. Dyspnea was more common in female cases.
A scanning election microscopic study of the effect of primer on sealant penetration in saliva contaminated enamel
Pahlevan A,Nakhjavani Y,Tavassoli Hojati S
Journal of Dental Medicine , 2010,
Effect of Paclobutrazol and Cycocel on Vegetative Growth and Flowering of Zinnia (Zinnia elegans)
M Hojati,N Etemadi,B Bani Nasab
Journal of Science and Technology of Agriculture and Natural Resources , 2009,
Abstract: This study was conducted to evaluate the effects of paclobatrazol and cycocel on some quantitative and qualitative traits of zinnia. Seedlings were transplanted on Horticulture Department Farm , College of Agriculture, Isfahan University of Technology. The experiment was carried out in the framework of randomized complete block with 3 replications. Triats which were studied included plant height, leaf and flower number, lateral shoot number, flower diameter, lateral shoot lenght, leaf chlorophyl content, the period of the flowering, root fresh and dry weight, leaf area, root number, diameter and length, root and shoot carbohydrate. Results showed that cycocel at 1000 and 2000 ppm reduced height. Cycocel 2000ppm caused most lateral shoot and flower number and the lowest lateral shoot length. The lowest root fresh and dry weight, root number and length and shoot carbohydrate were obtained by cycoel 2000 ppm. Paclobutrazel at 30ppm resulted in the most leaf chlorophyl content. There were no significant differences between treatments related to the period of the flowering, flower diameter, leaf number and area, root diameter and carbohydrate.
Trichloroisocyanuric acid as an efficient homogeneous catalyst for the chemoselective synthesis of 2-substituted oxazolines, imidazolines and thiazolines under solvent-free condition
Hojati Fatemeh Seyedeh,Nezhadhoseiny Atefe Seyede
Journal of the Serbian Chemical Society , 2012, DOI: 10.2298/jsc111031028h
Abstract: Trichloroisocyanuric acid as a commercially available and inexpensive catalyst has been used in a new, facile and efficient procedure for the synthesis of 2-oxazolines, 2-imidazolines and 2-thiazolines through the reaction of nitriles with 2-aminoethanol, ethylenediamine or 2-aminoethanthiol under solvent -free conditions.
Detection of Cloned strR, an Antibiotic Regulatory Gene, using RFLP and Nested PCR
Zohreh Hojati,Majid Motovali-Bashi,Naser Golbang,Farshad Darvishi
Pakistan Journal of Biological Sciences , 2007,
Abstract: The genetics of streptomycin production is well characterized in Streptomyces griseus. More than 25 clustered genes encode proteins involved in biosynthesis, regulation and transport functions. StrR, the pathway specific transcriptional activator or regulator that located in this cluster, then induces transcription of other streptomycin production genes by binding multiple sites in the gene cluster. We aim to put strR gene in to different multicopy and integrated expression vector specifically designed for Streptomyces. To start with, the isolated strR gene was ligated into pBluescript (pBs) vector and transformed into different strains of Escherichia coli. The correct structure of the recombinant plasmid, isolated from transformed E. coli, was confirmed using gel electrophoresis, PCR and double digested with restriction enzymes BamHI and EcoRI. Finally the plasmid map, named pFDstrR. This unique vector has a much expanded Multiple Cloning Site (MCS), which makes it suitable for different purposes of gene cloning and also site directed mutagenesis or gene targeting. This gene will be lifted up and transfer into different varieties of Streptomyces specific vectors in order to make different transgenic or genetically manipulated Streptomyces.

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