Showing 13 results for Sabzi
Volume 2, Issue 7 (Fall 2009)
Abstract
Volume 2, Issue 7 (Fall 2009)
Abstract
Volume 3, Issue 1 (6-2013)
Abstract
The Success of organizations and corporations depends heavily on the innovation and management of personnel's ideas and suggestions. The usability as a key indicator in assessing human resources and organizational systems can help managers to ensure higher level of performance. This paper offers a framework for assessing idea and suggestion management systems based on usability in 4 proposed systems. This descriptive and analytical study was carried out during 2012-2013 in Lorestan Gas Company. Data gathering was done using a researcher-made questionnaire and the validity of questionnaire was confirmed by academicians and practitioners and its reliability was verified through conducting a pre-test in 20 participants with a Correlation Coefficient of 0.92. Results indicate that the most usable suggestion systems has the highest participation rate and the least usable ones attracted the least suggestions from personnel.
Volume 3, Issue 2 (4-2012)
Abstract
Lorestan pins as an object with diverse kinds, diverse construction methods and diverse functions, though investigated in the studies of researchers as a part of Lorestan’s bronze objects and, in some cases, in general studies, have not yet been focused on well enough, and no technical studies as such have ever been done on them.
Among the manmade objects of the inhabitant tribes in this region are metal objects. One of the metal objects discoveredis metal pin in which different metals such as iron, silver and bronze and,so far in some cases, a combination of these have been used. They date back to the first and second millennium BC. This study tries to investigate, describe, explain, compare and introduce these pins focusing on their manufacturing techniques, designs, type, function and history.
Volume 5, Issue 2 (3-2014)
Abstract
Khaveh plain in the township of Delfan is considered as one of the important plains in the Central Zagros Mountain situated in Eastern Pusht-i Kuh and located between Garin and Sefid-e Kooh Mountains. In general, 36 archeological sites have so far been identified in this plain: the oldest of which relates to aceramic Neolithic Age, and the newest one belongs to the Late-Islamic Age. Among them, 20 sites contain relics related to the Parthian Period. The noteworthy discussions in the present study are mainly based on the activities performed at this plain during 2009-2010 in order to register and determine the boarders of archeological sites, and those carried out in 2011 aiming to identify and analyze the settlement patterns of the Parthian reign in this region. General perception and understanding of the settlement pattern in this region during the Parthian period is the results of this research, which represents demographic or settlement dispersion changes compared with the previous eras. Also it became clear that most of the settlements in the region were small villages or temporary settlements and no evidence of urban centers was recognized. Finally, the present study deals with the investigation and interpretation of the settlement patterns of the Parthian period in this plain.
E. Sabzi , H. Mohammadi Azarm , A.p. Salati ,
Volume 7, Issue 2 (Spring 2018)
Abstract
Aims: Efforts to reduce the feed conversion ratio, increase the rate of growth, and increase resistance to diseases are among the most important purposes of research on carp common carp. The aim of this study was to examine the effect of different levels of L-carnitine on growth factors, body compositions, and some blood biochemical parameters of fingerling carp (Cyprinus carpio).
Materials and Methods: The present experimental research was conducted on 90 fish for 8 weeks. The fish were randomly divided into 9 fiberglass tanks containing 300liters in 3 treatments and 3 replicates. Treatments consisted of 3 levels (0, 500, and 1000mg L-carnitine) and the fish were fed 3 times a day. Growth, morphometric, and nutritional parameters, as well as blood factors of the treatments were compared. The value of moisture, ash, protein, and fat in diet and body composition were determined by AOAC method; the data were analyzed by SPSS 16 software, using one-way ANOVA and Duncan test.
Findings: Different amounts of L-carnitine showed no significant difference in growth, but with increasing the levels of L-carnitine, an increasing trend was observed in improving feed conversion ratio. Value of protein and fat of body composition were increased and decreased, respectively, by 1000mg that was statistically different from the control group (p<0.05). Value of glucose and HDL increased and cholesterol and LDL decreased by 1000mg L-carnitine compared with the control group (p<0.05). L-carnitine had no significant effect on the level of triglyceride and hematocrit.
Conclusion: The addition of 1000mg L- carnitine/kg to common carp fingerlings diet improves the body composition and the function of blood parameters in the treated fish.
Volume 8, Issue 2 (Spring 2022)
Abstract
Backgrounds: Bacteriophage therapy could be an alternative strategy for the treatment of antibiotic-resistant bacteria. This study aimed to evaluate the antibacterial activities of isolated bacteriophages against methicillin-resistant Staphylococcus aureus (MRSA) isolates.
Materials & Methods: A total of 16 clinical isolates of MRSA were collected from medical diagnostic laboratories in Tehran, Iran. A specific bacteriophage was isolated from hospital sewage using double-layer agar. Phage morphology was evaluated by transmission electron microscopy (TEM). Different bacteria were selected to determine the bacteriophage host range using spot test. Phage susceptibility to temperature and pH was evaluated by double-layer agar method. In vitro assay was carried out on human epithelial type 2 (HEp-2) cells to investigate the effect of bacteriophage on the adhesion of MRSA to human epithelial cells.
Findings: TEM suggested the Myoviridae family for the isolated phage. The effective titer of bacteriophages was 1.8×107 PFU/mL. The isolated bacteriophage was stable at 4 ˚C and pH=8. The isolated bacteriophage was specific for all clinical isolates of MRSA and had no lytic activity against other pathogenic bacteria. In evaluating the binding and invasion of MRSA to the HEp-2 cell line, as expected, the lytic activity of specific bacteriophages was observed following inoculation.
Conclusion: The specificity and lytic activity of this phage on MRSA and MRSA-infected HEp-2 cell line emphasized that the isolated bacteriophage may serve as an effective prophylactic and alternative therapeutic agent in hospital settings.
Volume 13, Issue 4 (12-2013)
Abstract
Geotechnical designs are commonly based on several assumptions. Regardless of limitations caused by the inherent variability of soil and its unknown behavior, field measurements by the site instrumentation provide opportunities to have a safe and efficient design. Therefore, instrumentation has an important role in geotechnical research and professional studies. With the development of urban construction, excavations adjacent to buildings have increased dramatically. With large changes in stress distribution due to excavation, displacements may occur in the adjoining buildings and the soilmass. In urban excavations, the control of displacements created in soil and adjacent buildingshave always been an important issue due to the risk of damages. An optimum design and safe operation of the supporting system require a full understanding of the load distribution and displacement patterns in it. A simple traditional method in protecting the excavations is the use of inclined struts.This method,commonlyusedinIran,is the use of inclined strutsto support the adjacentbuildings. This method is not merely used in large excavations, but it is very popular for small to medium size excavations because of long-term traditional uses in Iran. Althoughthe mentioned method has practical applications but it is not fully investigated. It is necessary to investigate the presented method to determine itsadvantages and disadvantages as well as the limitations and the appropriate scope of its application. Some theoretical and numerical studies have been conducted in this regard and in fact the primary understanding of the performance mechanism of inclined struts and the loads acting on them are based on numerical studies. Thispaper reports the results of aninstrumentation undertakenon inclined struts during excavation and presentsvaluable informationaboutthe performance of such struts. In addition, a two dimensional numerical modelingwas performedand calibrated in order toverifythe mechanism ofstruts performance observed in thefield monitoring. The results proposethe mechanismof the inclined struts during excavation beside existing buildings as follows:
(a)Partofthe load of the adjacent building ispassed to the bottom of the excavation through theinclined strutand consequentlyless pressure is exertedonthesoilbeneath the foundation. Therefore the amount of settlement beneath the foundation decreases. This mechanism suggests that inclined struts act as underpinning.
(b) The inclined strutreduces the horizontal displacements of the excavation wall and the neighboring buildings due to the lateral constraintsit creates. As described below, the reduction of horizontal displacement has a significant impact on reduction of damage in neighboring buildings.
Moreover, the paper in troduces a set of simpleinstrumentations which are designed in the course of the presented study andcan beusedin common engineering practice for small to medium size excavations. Monitoring is commonly neglected in small or medium projects but the use of proposed set of monitoring tools could play an important roleto increase safety and also in the investigation of excavations in urban areas
Volume 16, Issue 91 (September 2019)
Abstract
In the current study, the effect of seasonal variation on the type and percentage of phytochemical compounds of Artemisia fragrans Willd. essential oil was investigated. Herbal samples were collected in 4 different seasons and then their essential oils were extracted by the Clevenger type apparatus. In the following, the essential oil compositions of each season was analyzed by GC-MS apparatus. In total, 50 different compounds were identified in four sentential oil. The major components of the essential oil were camphor, thujone, and 1,8-cineole in different seasons. Also, the results showed that monotreptans were the major class of essential oil compounds in September (91.87%), December (90.55%), May (96.32%) and July (95.4%). The highest amount of phenolics (5.49 mg GAE/g) and antioxidant capacity (28.98%) were observed in essential oil of Septebmer. Antibacterial effects of the different essential oils using paper disc diffusion method were carried out on Escherichia coli, Proteus vulgaris, Klebsiella pneumonia, Staphylococcus aureus, and Bacillus subtilus. Based on the results of the study, gram negative bacteria (E. coli, Proteus vulgaris, and K. pneumonia) were more susceptible to artemisia essential oils in comparison with gram positive bacteria (S. aureus and B. subtilus). The results of this research can be useful in determining the best sampling date of this plant for pharmaceutical and antibacterial uses.
Volume 18, Issue 115 (September 2021)
Abstract
The control pests and diseases is considered one of the most important operations of Citrus in the protection stage. Today, a lot of research has been done in various fields of agriculture, including the diagnosis of plant pests and diseases by using machine vision methods. One of the problems that reduce the accuracy of the machine for detecting pests in farm conditions is the presence of adverse factors such as shade and changes in light intensity at different times of the day. In this study, in order to find the appropriate light intensity at different times of the day and increase the brightness of the shady parts of the trees, lighting by a lamp at the imaging site has been used. For detect pest-infected trees (in this snail study) has been used to Deep learning method which has been studied and evaluated by various optimization algorithms such as RMSProp, Adam and SGDm. To evaluate and test the algorithm used, 8000 images were examined in 9 farm conditions and one laboratory state In farm conditions, the lowest detection accuracy of algorithms with 64.32% related to imaging in cloudy days with light intensity of 350 to 700 lux was obtained using RMSProp algorithm, which Detection accuracy was improved up to 95.25% using SGDm algorithm by creating a light intensity controlled by a lamp (approximately 9000 lux). In laboratory conditions where the images were prepared in a controlled environment with constant light intensity, the detection accuracy was Obtained 98.73% with SGDm algorithm.
Volume 19, Issue 133 (February 2023)
Abstract
Synbiotic yogurt is the most important food ingredient from the combination of probiotics and prebiotics, which increases the survival of probiotic bacteria during yogurt storage due to its prebiotic properties. The purpose of this study was to develop synbiotic buffalo yogurt by addition of inulin and fructo-oligosaccharide as prebiotics compounds (0.5, 1 and 1.5%) on the survival of Lactobacillus acidophilus and Bifidiobacterium bifidium bacteria and physicochemical and sensory properties of buffalo yogurt. The physicochemical characteristics (pH, acidity, dry matter, fat, protein, viscosity, syneresis) and sensory evaluation (taste and texture) during 21 days of storage and the survival rate of Lactobacillus-acidophilus and Bifidiobacterium bifidium during 21 days were investigated. The results of the statistical analysis showed that with increase in the fructo-oligosaccharide level compared to the sample containing inulin and the control, the pH decreased, acidity, dry matter, water retention and viscosity increased (p<0.05). Also, the amount of fat and protein did not differ significantly during 21 days of shelf life (p>0.05). In terms of sensory evaluation, the samples of synbiotic buffalo yogurt containing high percentage of fructo-oligosaccharide and inulin were evaluated better than the control. Therefore, the use of fructo-oligosaccharide and inulin is recommended for the production of synbiotic buffalo yogurt with functional properties.
Volume 22, Issue 3 (Autumn 2022 2022)
Abstract
High and unpredictable inflation rates reduce the demand for domestic money and increase the demand for alternative assets such as foreign currency. Currency substitution is a situation in which foreign currency is replaced for domestic money in doing monetary functions. The purpose of this article is to investigate the factors affecting currency substitution in Iran, with emphasis on inflation uncertainty. For this purpose, based on the data of 1978-2018, the degree of currency substitution is obtained using the Kamin-Ericsson (2003) method and the EGARCH model is used to calculate inflation uncertainty. The estimation of an autoregressive distributed lag model show that in the short- and long-run, rising inflation leads to increased currency substitution. Inflation uncertainty in the short run increases currency substitution after three lags. In the long run, inflation uncertainty has a positive relationship and economic growth has a significant inverse relationship with currency substitution. Given the impact of inflation and its uncertainty on currency substitution, inflation control policies should be considered by policymakers.
Volume 23, Issue 1 (2-2016)
Abstract
Alashtar is one of the prominent valley plains in central Zagros Mountain Range. The main focus of this study is based on the activities performed in this plain in 2006-2007 periods with the aim of identifying and studying the ancient relics as well as the studies conducted in 2010 to identify and analyze Parthian settlement patterns in this area. Archaeological survey in the area identified 72 historical sites and ancient monument. The current studies suggest that first settlements in this area date back to Copper and Stone Age and the most recent settled sites belong to the later centuries of the Islamic period. Among the historical relics found in Alashtar plain, 42 relics contained remnants of the Parthian. The overall perception of the settlement pattern in this plain during Parthian period reflects variation in population or distribution of settlement patterns compared to the former and later periods. The distribution pattern of the identified historical sites suggests that the settlements were mainly in the form of rural units with no evidence of urban centers. Overall, the distribution pattern of Parthian settlements has been strongly influenced by climatic characteristics, environmental capabilities and the special geographical position of the region. This paper attempts to study the Parthian settlement pattern in this plain; moreover, it seeks to examine these historical sites and interpret the settlement patterns in the Parthian period.
