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Search Results: 1 - 10 of 144302 matches for " B. Nasrollahzadeh "
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B. Nasrollahzadeh,M. Heshmati
Acta Medica Iranica , 1997,
Abstract: litis study is based on embryotoxic effects of ethanol on embryos and discussing the morphologic and hhtahtgic changes and defects an mouse. Tlie female animals were divided in three groups. Hie first group untreated as a control group but the second and third group received 10% and 20% solutions of ethanol respectively. Animals get use to certain level of ethanol solution and in the 10th day, the pregnancy period has been started. Then on the 19th day of gestation, the embryos were taken out from their mother's uterus and were examined for morphologic, histologic and skeletal disorders. In the first examination, the major defect was weight and length reduction in the second and third groups. these deffects, were severe in the second group in compare to third group that might be related to little consumption of the ethanol solution, due to bitter taste. In conclusion the teratogenic effect of alcohol on skeleton and joint is clear.
Effects of Nitrogen and Phosphate Biofertilizers on Morphological and Agronomic Characteristics of Sesame (Sesamum indicum L.)  [PDF]
Ali Nasrollahzadeh Asl
Open Journal of Ecology (OJE) , 2017, DOI: 10.4236/oje.2017.72008
Abstract: In order to investigate the effects of Barvar-2 phosphate biofertilizer and nitroxin biofertilizers on agronomical characteristics of sesame, an experiment was carried out as factorial based on randomized complete block design with three replications and two factors in Khoy city, northwest of Iran, in 2014 growing seasons. The factors were as follows: phosphorus fertilizer in three levels (control, barvar-2 phosphate bio-fertilizer with 100 kg triple superphosphate per hectare and 200 kg triple superphosphate per hectare) and nitrogen fertilizer in four levels (control, nitroxin bio-fertilizer with urea at rate of 100 kg·ha1, nitroxin biofertilizer with urea at rate of 150 kg·ha1 and urea at rate of 200 kg·ha1). The results showed that a significant effect of nitrogen and phosphate biofertilizer, on plant height, branches per plant, pods per plant, seed in pod, oil percent, seed yield and harvest index. Maximum seed yield of 1274.37 and 1232.5 kg·ha1 was obtained from treatments of 200 kg·ha1 triple superphosphate and barvar-2 phosphate biofertilizer besides 100 kg·ha1 triple superphosphate. For nitrogen biofertilizer, maximum seed yield of 1264.83 and 1246.12 kg·ha1 was obtained from treatments of 200 kg·ha1urea and nitroxin biofertilizer besides urea 150 kg·ha
The autologus graft of epithelial tissue culture
Nasrollahzadeh B,Shamshiry M,Safari M,Minaee B
Tehran University Medical Journal , 1999,
Abstract: With the intention of research about culture and autologus graft of epithelial tissue we used 4 french Albino Rabbits with an average age of 2 months. After reproduction on the support in EMEM (Eagle's Minimum Essential Medium) we used this for graft after 4 weeks. This region which grafted total replaced. After fixation of this sample and passing them through various process, histological sections were prepared. These sections were stained with H & E and masson's trichrome and studied by light microscope. We succeeded in graft. We hope in the near future by using the method of epithelium tissue culture improving to treat burned patients.
CAE Characterization and Optimization of Automotive Seat Rattle Noise  [PDF]
Milad Tatari, Mohammad Fard, Naser Nasrollahzadeh, Mohammad Mahjoob
World Journal of Engineering and Technology (WJET) , 2014, DOI: 10.4236/wjet.2014.23022
Abstract: The vehicle seat rattles or, in general, BSR (buzz, squeak, and rattle) noises are one of the major issues, which are directly linked to the NVH (noise, vibration and harshness) quality of the vehicle. Predicting and improving the seat BSR noise in early design phase is still challenging. This is mainly due to the complexity, nonlinearity and uncertainty of the impact mechanism at joints contributed to the rattle. Here, it is shown that there is a strong link between the seat structural dynamics and the seat rattle noise so that the seat rattle noise can be predicted and controlled from the seat structural analysis in early design phase. Accordingly, two experiments are designed for this study. The first experiment is set up to characterize the seat resonant frequencies and its corresponding structural mode-shapes. The second experiment is designed to measure the seat-radiated noise when it goes under vibration excitation. Alternatively, a concept CAE (Computer Aided Engineering) model of the seat is developed and the seat structural dynamics is characterized by using this analytical model. The model is developed to allow designing the seat-structure modifications as well as examining the effects of the modifications on the rattle noise. Comparisons of the results of the simulation and experiment validate the developed CAE model. The results confirm that by changing the seat resonant frequency, the rattle noise and in general BSR noise can be improved or controlled accordingly. Consequently, for the seat system which has an identifiable structural dynamics, the BSR noise can be managed and controlled in early design phase by using the seat CAE model.
Silica Sulfuric Acid as an Efficient Heterogeneous Catalyst for the Solvent-Free Synthesis of 1-Substituted 1H-1,2,3,4-Tetrazoles
Davood Habibi,Hiva Nabavi,Mahmoud Nasrollahzadeh
Journal of Chemistry , 2013, DOI: 10.1155/2013/645313
Variations in Nutrient Concentration and Phytoplankton Composition at the Euphotic and Aphotic Layers in the Iranian Coastal Waters of the Southern Caspian Sea
Hasan Nasrollahzadeh Saravi,Zubir Bin Din,Asieh Makhlough
Pakistan Journal of Biological Sciences , 2008,
Abstract: Temporal variations and regional distributions of dissolved nutrients and their elemental ratios in the Iranian coastal waters of the Southern Caspian Sea were investigated. The data were collected in 1996-97 (Phase I, as a background data and undisturbed ecosystem) and in 2005 (Phase II, as a disturbed ecosystem) at sampling points (from 10 to 100 m depths). In addition to the two main sampling exercises, additional sample collections were carried out during the period of 1994 to 2004 as a long-term study. This study showed that the dissolved inorganic nitrogen/dissolved inorganic phosphorus (DIN/DIP) ratios in the southern Caspian Sea vary within a very narrow range (4.47 to 5.78) within the euphotic and aphotic layers and is by one order of magnitude lower than what have been reported for several other marine ecosystems. Phytoplankton growth seems to be nitrogen limited while the levels of P and Si always remain high. Factor Analysis/Principal Component Analysis (FA/PCA) of the correlation matrix showed that the nitrogen compounds are associated with the main factor accounting for 25.7-26.2% of the total variance for both the sampling periods. During Phase I, the Chrysophyta were the major group, whereas during Phase II the proportion of Chrysophyta in the total community progressively decreased, while the other groups increased.
Effects of Minimum and Maximum Doses of Furosemide on Fractional Shortening Parameter in Echocardiography of the New Zealand White Rabbit
Roham Vali, Mohammad Nasrollahzadeh Masouleh* and Siamak Mashhady Rafie1
Pakistan Veterinary Journal , 2013,
Abstract: There is no data on the effect of maximum and minimum doses of furosemide on heart's work performance and amount of fractional shortening (FS) in echocardiography of rabbit. This study was designed to validate probability of the mentionable effect. Twenty-four healthy female New Zealand white rabbits were divided into four equal groups. Maximum and minimum doses of furosemide were used for the first and second groups and the injection solution for the third and fourth groups was sodium chloride 0.9% which had the same calculated volumes of furosemide for the first two groups, respectively. The left ventricle FS in statutory times (0, 2, 5, 15, 30 minutes) was determined by echocardiography. Measurements of Mean±SD, maximum and minimum amounts for FS values in all groups before injection and in statutory times were calculated. Statistical analysis revealed non-significant correlation between the means of FS. The results of this study showed that furosemide can be used as a diuretic agent for preparing a window approach in abdominal ultrasonography examination with no harmful effect on cardiac function.
Evaluation of Healing Potential of Autogenous, Macroscopic Fat Deposited or Fat Free, Omental Graft in Experimental Radius Bone Defect in Rabbit: Radiological Study
Mohammad Nasrollahzadeh Masouleh, Iraj Sohrabi Haghdoost, Gholamreza Abedi Cham Heydari, Amirali Raissi* and Soroush Mohitmafi1
Pakistan Veterinary Journal , 2011,
Abstract: This study was designed for evaluation of the difference between the ability of greater omentum graft with or without macroscopic fat deposition in acceleration of bone healing process. Adult female New Zealand white rabbits (n=15) were randomly divided into three equal groups. In groups A and B, the drilled hole on the left radius was filled by the omentum without and with macroscopic fat deposition, respectively while drilled hole on the right radius left intact for consideration as control. In group C, the drilled hole on the left and right radius was filled by the omentum sample with and without macroscopic fat deposition, respectively. Experimental bone defects on the radiuses were secured by the pieces of greater omentum, with or without macroscopic fat deposition, which obtained as an autogenous graft from each rabbit in accompany with control samples. Standardized serial radiography for evaluation of bone healing was performed and the difference in bone healing process in three groups of study was determined. According to the obtained data, the radius bones which filled by omentum without macroscopic fat deposition showed faster healing process than the radius bones which filled by omentum with macroscopic fat deposition (P<0.05).
Effects of Hydro-Priming Duration on Seedling Vigour and Grain Yield of Pinto Bean (Phaseolus vulgaris L.) Cultivars
Notulae Botanicae Horti Agrobotanici Cluj-Napoca , 2010,
Abstract: Seeds of pinto bean (Phaseolus vulgaris L.) cultivars (‘Talash’, ‘COS16’ and ‘Khomain’) were divided into four sub-samples, one of which was kept as control (non-primed, P1) and three other samples were soaked in distilled water at 20oC for 7 (P2), 14 (P3) and 21 (P4) hours and then dried back to initial moisture content. In the laboratory, the lowest mean germination time and the highest germination percentage and seedling dry weight were achieved with P2, which was not significantly different from P3. Mean time of seed germination for ‘Khomain’ was significantly higher than that for ‘Talash’ and ‘COS16’. In the field, 1000 grain weight of ‘Khomain’ was significantly higher than that of other cultivars, but mean grains/plant, grains/m2, grain yield/plant and grain yield/m2 of ‘COS16’ and ‘Talash’ were significantly higher than those of ‘Khomain’. Therefore, grains/plant was the most important yield component affecting grain yield of pinto bean cultivars. Hydro-priming for 7 and 14 hours resulted in lower mean emergence time and higher seedling emergence percentage, grains/m2 and grain yield/m2, compared with P1 and P4. Grains/plant, 1000 grain weight and grain yield per plant were not significantly affected by hydro-priming. However, hydro-priming for 7 and 14 hours improved grain yield per unit area indirectly through enhancing seedling establishment and grains/m2. Extended priming duration negatively affected laboratory and field performance of pinto bean cultivars.
Biodegradation of phenanthrene in an anaerobic batch reactor: growth kinetics
H.S. Nasrollahzadeh,G.D. Najafpour,M. Pazouki,H. Younesi
Chemical Industry and Chemical Engineering Quarterly , 2010,
Abstract: The purpose of the present research was to demonstrate the ability of mixed consortia of microorganisms to degrade high concentrations of phenanthrene (PHE) as the sole carbon source. Batch experiments were carried out by the induction of mineral salt medium containing PHE to the seed culture and monitoring PHE biodegradation. The microbial propagation was conducted using PHE concentrations in the range of 20 to 100 mg/l. The microbial growth on PHE was defined based on Monod and modified Logistic rate models. The kinetic studies revealed that maximum specific growth rates (μm) for PHE concentrations of 20, 50 and 100 mg/l were 0.12, 0.23 and 0.035 h-1, respectively. The doubling times for microbial population in PHE concentrations of 20, 50 and 100 mg/l were 13, 15 and 17.5 h, respectively. Also, maximum cell dry weight (xm) of 54.23 mg/l was achieved, while the inhibition coefficient was 0.023 h-1. It was observed that the experimental data were well represented by the proposed models. It was also found that the biodegradation of PHE was successfully performed by the isolated strains.
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