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Search Results: 1 - 10 of 2690 matches for " Saeed AZIZI "
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Analysis of Competition Power of Iranian Almond Export
Azizi Jafar,Yazdani Saeed
Journal of Agricultural Science , 2010, DOI: 10.5539/jas.v2n1p79
Abstract: This study has been done in 2007 year to examine the competition power of Iranian almond in export markets and its relative advantages among the countries that are involved almond production and trade. A time series data for years 1970-2002 were analyzed to reach the study objectives. The RCA and RSCA indices were estimated to measure the competition power of almond in World market. The results indicated that based on introduced criteria, the value of RCA has been dropped from 222.71 in 1970 to 4.10 in 2002. So, this means that the position of Iran in almond export market is decreasing. Negative correlation between RCA of Iran and the USA shows that United State has been able to outshine Iran export market using new technologies. According to the estimated export function, it seems that the variables such as domestic GDP, wholesale price Index and foreign exchange rate have a significant impact on export of almond.
STUDYING OF SAFETY CLIMATE ASSESSMENT: A CASE STUDY AT STEEL INDUSTRY
Hassan DARVISH,Mehdi ROOSTAEI,Saeed AZIZI
Management & Marketing , 2011,
Abstract: Evolution of safety climate used as a practical means has determined and assessed potential problems relevant to safety issues in an organization and can be used in individuals’ performance and work efficiency and decreasing rate of incidents ;as well as; guidance to provide safety organization policy and comparison of safety performance in different organizations. The study wants to determine and prepare safety climate profile and application of its results in improving safety situation. In this study, applied tools presented by Loughborough University are used to evaluate safety climate in one of steel industries and data is collected through questionnaire, group discussions or purposeful interviews and observations, and safety climate score was obtained in 17 scopes. Calculating the score of each safety climate domain and preparing the profile indicated there is the average rate (4.89 2) in the safety climate of the industry.
Microinjection of orexin-A into the locus coeruleus area induces morphine withdrawal-like behaviors in morphine dependent rats
Hossein Azizi,Saeed Semnanian,Seyed Javad Mirnajafizadeh
Physiology and Pharmacology , 2011,
Abstract: Introduction: It has been shown that orexin peptides have a role in opioid withdrawal behaviors. Orexin-expressing neurons that are present in the hypothalamic nuclei send dense projections to the Locus Coeruleus (LC). Withdrawal syndrome is temporally associated with hyperactivity of LC neurons. However, LC neurons do not show withdrawalinduced hyperactivity in the brain slices from morphine-dependent rats. Thus, it has been suggested that the increase in LC neuronal activity seen in vivo is mediated by extrinsic factors. Therefore, this study was carried out to find whether LC microinjection of orexin-A can induce withdrawal behaviors. Methods: Adult male Wistar rats weighing 250-300 grams were rendered morphine dependent by subcutaneous injection of morphine sulfate (10 mg/kg) at an interval of 12 h for 9 days. On day 10, intra-LC microinjection of orexin- A (100 μM, 200 nl) was performed two hours after morphine administration. Thereafter, somatic signs of withdrawal were evaluated in a Plexiglas chamber (30 cm diameter, 50 cm height) during a period of 25 min. Results: Orexin-A induced several signs of morphine withdrawal including chewing, scratching, rearing, teeth chattering, wet-dog shake and paw tremor. Acute LC microinjection of an orexin type 1 receptor antagonist, SB- 334867-A, prior to orexin-A prevents the expression of these signs. Conclusion: It may be concluded that orexin, via orexin type 1 receptor at LC acts as an extrinsic factor in the expression of morphine withdrawal syndrome.
A Two-Stage Rumen Cannulation Technique in Sheep
Saeed,Azizi,R. Pir-Mohammadi,F. Pour-Hasani
Journal of Animal and Veterinary Advances , 2012,
Abstract: This experimental study was carried out to describe and evaluate a modified two-stage technique of rumen cannulation in sheep. Ten healthy, castrated, Makoyee sheep with no previous history of gastrointestinal dysfunction were chosen. The surgical technique was performed in two stages. In the first, a 5-cm vertical incision was made in the mid paralumbar fossa. The incision was continued through the subcutaneous. Then the muscular layers of the abdominal wall were divided in the grid technique. The dorso- lateral portion of the dorsal sac of rumen was anchored to the skin by application of four interrupted horizontal mattress suture at 4 points circumferentially using No. 1 silk. In the second, the exposed rumenal wall was incised longitudinally at the mid part of the stay sutures. A rubber-sheep cannula was inserted into the opening and then fixed with an external elastic washer. To augment the cannula stability, the inner flange was also reinforced with a tough rubber washer. All the sheep had normal behavior and appetite during the experiment. In the follow up period no local inflammation, infection, hemorrhage, tissue flap necrosis, wound dehiscence; and suture abscess encountered in the surgical site. Neither evidences of anorexia, toxemia, septicemia and peritonitis were detected. No sign of intra peritoneal infection was observed on inspection of carcasses. The sheep did not lose weight significantly and the cannulas remained permanent fixed in position in 9 cases. This modified ruminal cannulation technique could be considered as a useful alternative with less failure and no more adverse consequences. Furthermore, the technique might be recommended to veterinary scientists who deal with experimental studies on sheep nutrition and husbandry.
The Effect of Macroeconomic Policies on Poverty in Iran
Azizi Jafar,Yazdani Saeed,Eshghi T. Aref,Taleghani Mohammad
International Journal of Economics and Finance , 2011, DOI: 10.5539/ijef.v3n1p229
Abstract: The objective of this study is to analysis the effectiveness of government intervention on poverty groups using a general equilibrium model. The social accounting matrix of year 2002 was used to estimate the GE model. The results indicate that absolute poverty line for the urban and rural regions are 3.7 and 2.4 million Rials respectively. Also the result shows that the majority of Iranian households are living under the poverty line. Thus, it is expected that the average propensity to consume among the households is high but on the other hand the average propensity to save is low.
Microinfusion of TNFα and its antibody into locus coeruleus modifies nerve injury induced thermal hyperalgesia and mechanical allodynia
Kambiz Rohampour,Homa Manaheji,Saeed Semnanian,Hossein Azizi
Physiology and Pharmacology , 2011,
Abstract: Introduction: Glial activation and secretion of cytokines at the spinal level is known as part of chronic pain pathogenesis. Although changes in TNFα at the supraspinal level are reported during chronic pain, its exact role and site of action remain to be elucidated. We investigated the effect of microinfusion of TNFα into the LC in a rat model of neuropathic pain. Methods: Male Wistar rats were cannulated in the LC. The cannula was connected to an Alzet mini-osmotic pump, which was filled by the drug (vehicle, TNFα or TNFα-antibody) and placed subcutaneously behind the neck. Twenty four-48 hours after cannulation, a chronic constriction injury (CCI) surgery was performed on the contralateral sciatic nerve. Hyperalgesia and allodynia symptoms were assessed 2, 4, 6, 8, 10 and 12 days after CCI. Results: Microinfusion of TNFα (100ng/day) into the LC significantly exacerbated the hyperalgesia in rat models of neuropathic pain on days 2 and 8 after CCI. On the other hand, microinfusion of TNFα antibody (250ng/day) decreased the symptoms of hyperalgesia on days 2, 4, 6, 8, 10 and 14. TNFα antibody also significantly alleviated the CCIinduced allodynia. Conclusion: These data suggest that alterations of TNFα levels in the LC play a crucial role in the development and maintenance of neuropathic pain.
Dehydroepiandroesteron increased proliferation of neural progenitor cells derived from p19 embryonal carcinoma stem cells.
hossein azizi,Narges Zare Mehrjerdy,Saeed Kasemi Ashtiani,MirzaKhalil Bahmani
Physiology and Pharmacology , 2008,
Abstract: Introduction: The p19 line of embryonal carcinoma cells develops into neurons, astroglia and fibroblasts after aggregation and exposure to retinoic acid (RA). Dehydroepiandroesteron (DHEA) is a neurosteroid, can increase proliferation of human neural stem cell (NSC) and positively regulated the number of neurons produced. This study was initiated to assess the effect of DHEA on neural progenitor cells derived from p19 embryonal carcinoma stem cells. Methods: p19 cells suspended in DMEM contain 5%FBS into bacterial-greade Petri dishes in the presence RA and DHEA in different concentration for 6 days. Serum concentration decrease to 3% in days 5 and 6. Then collected aggregate and processed for flowcytometry, immunocytochemistery and RT-PCR analysis. Cells were trypsinized for dispersion and replaced in poly L- lysine (10μg/ml) coated tissue culture dishes without RA and DHEA for 4 days. And then difference cells were evaluated by phase contrast microscopy. Results: Flowcytometry analyses of Nestin and Brdu/Nestin showed percent Nestin positive and proliferation Nestin positive cells in different groups DHEA and RA. Brdu/Nestin immunochemistry confirmed proliferation of Nestin positive cells and also RT-PCR analysis show expression of proneural marker and estrogen receptor gens.Result showed that RA +DHEA(1μM) significantly increased the number of Nestin positive and newly formed Nestin positive cells than other groups. Conclusion: Result showed DHEA accompanied RA significantly increased the number of Nestin positive and newly formed Nestin positive cells derived from p19 embryonal carcinoma cells but in comparison to RA cannot induce neural progenitor cells.
Bridging Small-Gap Peripheral Nerve Defect Using Silicone Rubber Chamber in the Rat Sciatic Nerve Transection Model
Saeed Azizi,Rahim Mohammadi,Keyvan Amini,Roza Fallah
Veterinary Research Forum , 2010,
Abstract: Despite promising results observed using silicone rubber chamber, no previous comprehensive work was performed on behavior of the conduit. Present study aimed at further functional, histomorphometrical and immunohistochemical assessment of nerve regeneration in the same animal along a 10-mm rat sciatic nerve gap. Fifty- four male Wistar rats were divided into three experimental groups (n = 18), randomly: Sham-operation (NC), Transected control (TC) and silicone conduit (SIL). In NC group after anesthesia left sciatic nerve was exposed through a gluteal muscle incision and after haemoestasis the muscle was sutured. In TC group left sciatic nerve was exposed the same way and transected proximal to the tibio-peroneal bifurcation leaving a 10-mm gap. In SIL group left sciatic nerve was transected the same way and proximal and distal stumps were each inserted into a silicone tube. Each group was subdivided into three subgroups of six animals each and were studied 4, 8, 12 weeks after surgery. Functional analysis showed significant improvement of nerve function in SIL group than in TC group (P < 0.05). Morphometric indices and immuohistochemistry indicated there were significant differences (P < 0.05) between SIL and TC groups 12 weeks after surgery. Silicone entubulation technique has offered the hope of providing a method for achieving the peripheral nerve regeneration in the least harmful way that is available, easily performed. Using silicone tubes in bridging of nerve defects could be promising because it is inert and does not induce extensive scarring or degeneration after implantation.
Energy Consumption and Fault Tolerance in the MAC Protocols for WSN  [PDF]
Ridha Azizi
Journal of Computer and Communications (JCC) , 2015, DOI: 10.4236/jcc.2015.36012
Abstract: Wireless sensor networks are currently experiencing widespread enthusiasm in the field of research, mainly because of the great benefits they promise in terms of flexibility, cost, range and robustness. In addition, such networks find use in a wide variety of applications, for example in collecting remote data, type of climate monitoring, seismic activity, or in other areas such?as home automation and medical. Unfortunately, their disadvantages are up to their promises. Indeed, the sensor nodes are subjected to high energy consumption constraints due to their compact size as well as the deployment environment. Frequent replacement of batteries is excluded in a field that can be difficult to access. Therefore, the main challenge remains as a result of miniaturization and reduces power consumption to maximize network lifetime. The objective of this work is to make a thorough study of the energy consumption in wireless sensor networks. The study points are addressed at the media access protocol or MAC protocol.
The effects of air pollution on vitamin D status in healthy women: A cross sectional study
Farhad Hosseinpanah, Sima pour, Motahare Heibatollahi, Nilufar Moghbel, Saeed Asefzade, Fereidoun Azizi
BMC Public Health , 2010, DOI: 10.1186/1471-2458-10-519
Abstract: In this cross sectional study 200, free-living, housewives, aged between 20 to 55 years, from Tehran (high polluted area) and Ghazvin (low polluted area) were included. The Tehranian women were selected randomly from participants of the Tehran Lipid and Glucose Study (TLGS) and the Ghazvinian females from patients who came to public health centers. Participants were excluded for disease and drugs which affect vitamin D status and also if they were pregnant or breast feeding. We measured the ground level of UVB using a Haze meter as a surrogate of air pollution. In order to calculate the adjusted mean difference of 25-OH-D, ANCOVA analysis was used. Moreover, Binary logistic regression model was developed to determine the odds of living in Tehran for having serum 25-OH-D less than 20 ng/ml.The mean ± SD of serum 25-OH-D was significantly higher in Ghazvinian women ((18 ± 11 vs. 13 ± 7), P-value < 001). The prevalence of 25-OH-D less than 10 ng/ml, and 25-OH-D between 10 and 20 ng/ml were higher in Tehranian group (36% and 54% vs. 31% and 32% in respectively). Secondary hyperparathyroidism was also significantly higher in Tehranian women (47% vs. 32%). In ANCOVA analysis, after adjustment, the mean of 25-OH-D in the Ghazvinian group was still statistically significantly higher than Tehranians (13 vs. 17 ng/ml P-value = 0.04). In addition, in binary logistic model, the odd of living in Tehran for having serum 25-OH-D less than 20 ng/ml was 5.22 (95% confidence interval 2.2-12.2, P-value < 0.001).We found that living in a polluted area plays a significant independent role in vitamin D deficiency and hence, residence can be one of the main reasons of vitamin D status of the women.Skin synthesis of vitamin D, under the influence of UVB, includes about 90% of all the body's requisites. Meanwhile, dietary sources of vitamin D (e.g., fish liver oils, egg yolks, and vitamin D fortified foods) are only responsible for a small portion of body requirements. Hence, inadequate rad
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