Showing 85 results for Roe
Volume 0, Issue 0 (1-2024)
Abstract
The agricultural ecosystem provides various functions and services for humans. So, investigating their role and importance in the agricultural land programming and management is one of the goals research. In this research used Common International Classification of Ecosystem Services (CICES) for the identification of the Agricultural Ecosystem Functions and Services (AEFS). Also, Multi-Criteria Decision-Making (MCDM) models used for weighting and prioritizing of the AEFS like Step wise Weight Assessment Ratio Analysis (SWARA) for calculating of their weight, and Simple Additive Weighting (SAW), Additive Ratio Assessment (ARAS), and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) used for prioritization them. The research data extracted with field survey, random sampling and completing the Delphi questionnaire of the 40 agricultural specialist experts in the north of Iran. Also, the R2 coefficient was used to compare the AEFS prioritization models. The SWARA technique findings showed that provisioning, regulation, and cultural functions with weights of 0.0298, 0.0286 and 0.0250 have the highest weight, respectively. Also, the results indicated that the SAW model with the R2=0.90 was chosen as the prioritization appropriate model. Provisioning, regulation, and cultural functions with marginal weights of 0.6319, 0.5448, and 0.5092 were ranked the first to third priority respectively. Also, food supply, employment, genetic material supply, and educational and research services were important positive services of the agricultural ecosystem compared to other services. it is suggested that more appropriate programming and more research be done by relevant organizations for the sustainable management of agricultural ecosystems in northern Iran.
Volume 1, Issue 1 (7-2004)
Abstract
Hojat Mirsadeghi, , , ,
Volume 4, Issue 1 (6-2015)
Abstract
Fish egg is an important source of polyunsaturated fatty acids, protein, minerals and vitamins. These are produced in the form of smoked, salted and then consumed. Initial preparations for washing eggs can have an important role on the finished product. To increase the strength of the egg membrane, waste removal, connective tissue and broken shells, fish eggs obtained after washing with different methods are carried out. In this study, three treatments have been utilized including, non-boiled water, boiled water cooled to3 to 5 °C, boiled water to 40 °C. Afterward, the two groups were prepared with 1.5% salt and no salt. Results of chemical, microbial and sensory tests were assessed on days 0, 12 and 24. It was shown that, cooled boiled water with a temperature of 3 to 5 °C with 1.5% salt and boiled water with a temperature of 40 °C with 1.5% salt gave the best and Non-boiled water with ambient temperature devoid of salt had the worst chemical andmicrobial results. In addition, cold boiled water with temperatures 3 to 5 °C with 1.5% salt showed the best sensorial results. Boiled water with a temperature of 40 °C and non-boiled water without salt had the lowest sensorial results.
Volume 5, Issue 2 (6-2019)
Abstract
The present study has been carried out in order to determine the entomofauna of four different agroecosystems from the study area, northwestern Algeria. Regular sampling was done using the Barber pitfall trap and the sweep net in addition to visual observations in the field. Nine (09) taxonomic orders of insects was identified from the four studied environments. It varies from one agroecosystem to another. Coleoptera and Orthoptera were the most represented in terms of both species and numbers. Entomofaunal diversity was more important in un-cultivated fields (diversity index = 4.15 bits, equitability = 0.89) than in arable fields (index ranging from 1.68 to 2.87 and a equitability between 0.41 and 0.72). Limited biodiversity in cultivated areas was the consequence of insect communities’ interactions disturbances caused by agricultural practices in these environments. Therefore, it is important to reduce these disturbances in order to enhance food resources, habitats and overwintering sites for insects. This will ensures sustainable entomological diversity, thereby increasing the role of biological control in pest management systems.
Volume 5, Issue 16 (4-2008)
Abstract
Over the past few decades, microwave processing and its high potential capabilities has attracted food scientists where they preferred to replace the old and time-bearing prevalent methods with this swift and simple method. Application of microwaves for microencapsulation is an innovative and new method in which the core and shell were combined at an appropriate ratio and treated by microwaves in order to microencapsulate the core material by coating one. In this research, the citric acid powder at two various size (100–500 and <100 micron) was microencapsulated at different ratios (1:5 and 1:10) by casein and inulin, at various microwave powers (up to 1200 W) for 50 to 250 seconds. Findings of qualitative evaluation of microcapsules by laboratory binocular, scanning electron microscope photographs as well as particle size analysis illustrated that the optimum conditions namely ratio and microwave power for microencapsulation of citric acid by both casein and inulin were 1:10 and 1200 W with slightly different treating time where it was 150 and 50 seconds, respectively. In the next step, these two microcapsules along with uncoated citric acid powder as well as commercial microcapsules of citric acid were added to the ribbon type chewing gum and the sensory evaluation regarding texture, stability of sour taste and aftertaste was done by a semi-trained taste panel. The findings revealed that in terms of sour taste stability and aftertastes, the chewing gum containing citric acid microencapsulated with inulin had highest score whereas with regard to texture one treated with the commercial microcapsules gained the highest score. In addition, the lowest sensorial scores were belonged to samples which treated by citric acid microencapsulated with casein. Finally, for the first time on a real foodstuff the practical capability of this novel, simple, low cost, and rapid microencapsulation technique was confirmed.
Volume 6, Issue 2 (7-2018)
Abstract
Aims: The information on species richness (SR) can be used to help establish conservation strategies or to predict future patterns of biodiversity under global change. The aim of the present study was the prediction of spatial distribution of plant species richness in the Valdarreh Rangelands, Mazandaran, Iran by Macroecological Modelling (MEM) and Stacked Species Distribution Models (S-SDM).
Materials & Methods: This experimental study was carried out in the Valdarreh rangelands. In the present study compared the direct, macroecological approach for modeling species richness with the more recent approach of stacking predictions from individual species distributions. Both approaches performed in reproducing observed patterns of species richness along an elevation gradient were evaluated. MEM was implemented by relating the species counts to environmental predictors with statistical models, assuming a Poisson distribution. S-SDM was implemented by modelling each species distribution individually, assuming a binomial distribution.
Findings: The direct MEM approach yielded nearly unbiased predictions centered around the observed mean values, but with a lower correlation between predictions and observations, than that achieved by The S-SDM approaches. This method also cannot provide any information on species identity and, thus community composition. Predicted SR by S-SDM was correlated by a Spearman p of 0.76 with the observed SR. The MEM-predicted SR achieved a Spearman rank correlation of 0.32 with S-SDM. The species richness along the elevational gradient for MEM and S-SDM were 0.21 and 0.82, respectively.
Conclusion: MEM and S-SDM have complementary strengths and both can be used in combination to obtain better species richness predictions.
S. Ghelichi , B. Shabanpour , P. Pourashouri,
Volume 7, Issue 2 (6-2018)
Abstract
Aims: Fish egg has a high nutritional value and is known as an offshore product in the fish processing industry in Asia. Thus, the present study aimed at evaluating proximate and amino acid composition, antioxidant properties, ACE inhibitory effect, and antibacterial power of protein hydrolysates from lyophilized common carp roe by Alcalase.
Materials and Methods: In the present experimental study, the lyophilized roe was subjected to hydrolysis by Alcalase for 30, 60, 90, and 120 minutes at pH 8 and 55˚C. Fat, as well as moisture, ash and protein were measured by AOAC and amino acid composition by high-performance liquid chromatography-mass spectrometry. DPPH scavenging activity, metal ion chelating, ACE inhibitory effect and anti-bacterial power of the samples were analyzed. The data were analyzed by SPSS 21, using ANOVA and LSD tests. Antioxidant property of hydrolysates increased with their concentrations.
Findings: By increasing the hydrolysis time, protein content, protein recovery percentage, and ash content increased, but the amount of fat and moisture decreased. The most abundant amino acids in common carp roe and its protein hydrolysates were valine, lysine, arginine, and leucine. The antioxidant properties of the samples increased with increasing concentration. DPPH scavenging activity of hydrolysates at 20mg/ml was significantly higher than that of BHT solution (p<0.05). All the hydrolysates exhibited antioxidant, ACE inhibitory and antibacterial effects.
Conclusion: Due to the high content of protein, bioactive peptides, and essential and unnecessary amino acids, Common carp roe protein hydrolysates has a high antioxidant property, ACE inhibitory and antibacterial properties.
E. Sharifi , S.a. Jafarpour, S.m.h. Hosseini,
Volume 7, Issue 3 (9-2018)
Abstract
Aims: Considering the unsaturated nature of fatty acids, the use of technologies to control its oxidation rate is essential for use in the food industry. Thereafter, the aim of this study was to investigate the effects of biopolymer concentration and core material percentage on quality characteristics of fish oil nanocapsules containing clove essential oil prepared by complex coacervation technique.
Materials and Methods: In the present experimental research, the effects of 3 independent variables including the total biopolymer percentage (gelatin-gum Arabic; 6, 8, and 10%), oil content (2 to 3%), and the concentration of clove essential oil (0, 2000, and 3000 ppm) on dependent variables such as size and zeta potential of particles, color, surface oil, encapsulation, and nanoencapsulation efficiency were evaluated. The present study was carried out as factorial experiment in a completely randomized design. One-way analysis of variance and Duncan test were used. The data were analyzed by SPSS 16 software.
Findings: The increase in total biopolymer percentage was associated with increasing particle size as it was in the range between 259.19±55.83 and 814.35±253.05 nm, respectively. In terms of color parameters, the yellowness of produced powders was increased by increasing the concentration of fish oil and cloves essential oil, while lightness was decreased by increasing the concentration of the biopolymer. Also, the superficial oil was increased by increasing oil and clove essential oil concentrations in the nanocapsules, and microencapsulation efficiency in different treatments was recorded between 65.1±2.75 in treatment 15 (10% biopolymer and 3% oil) to 98.84±0.78 in treatment 4 (8% biopolymer and 2% oil).
Conclusion: Using complex coacervation technique with gelatin-gum Arabic as a biopolymer can produce nano-sized particles.
Volume 7, Issue 25 (7-2010)
Abstract
The probiotic, Lactobacillus acidophilus PTCC 1643 was encapsulated in calcium alginate beads with the objective of enhancing survival during exposure to the adverse conditions of the gastro-intestinal tract. The probitic was incubated in simulated gastro-intestinal conditions for 0, 30, 60, 90 and 120 min. at 37 oC. The survivability of the probiotic, L. acidophilus PTCC 1643 was expressed as the destructive value (D-value). Particle size distribution was measured using laser diffraction technique. bead appearance was observed by scanning electron microscopy (SEM). The alginate coat prevented acid-induced reduction of the probiotic in simulated gastric juice (pH 1.5, 2 h), resulting in significantly (P < 0.05) higher numbers of survivors due to retarding the permeation of the gastric fluid into the cells. After sequential incubation in simulated gastric (60 min) and intestinal juices (pH 7.25, 2 h), number of surviving cells were 6.5 log cfu ml -1 for encapsulated L. acidophilus while 2.3 log cfu ml -1 was obtained for free cells.
Volume 8, Issue 2 (7-2008)
Abstract
Recent discussions on macroeconomic policy in developing and developed countries have emphasized the crucial role played by the real exchange rate in the adjustment process. There is a growing agreement that sustained real exchange rate misalignment will usually generate severe macroeconomic disequilibria through affecting macroeconomic variables.
This study aims to investigate the sources of macroeconomic variable fluctuations in Iran focusing on real exchange rate. We implement the model with a structural VAR model and variance decomposition technique using annual macroeconomic time series data of the Iranian economy from 1970 to 2005.
The findings suggest that real exchange rate fluctuations in Iran are mostly explained by monetary shocks as well as oil price shocks. Moreover, the results show that major part of income fluctuations in Iran are due to the price shocks, oil price shocks, money shocks, and supply shocks.
This paper recommends that diversifying the economy, developing infrastructure, stabilizing prices, increasing investment, reducing money fluctuations, and controlling money supply may well then contribute to improve growth performance in the economy. According to our results, money disturbances and oil prices effect significantly real exchange rate fluctuations. So, this paper suggests that conducting monetary policy requires a greater caution to stabilize the economy.
Volume 9, Issue 1 (12-2009)
Abstract
In this paper linear aeroelastic analysis of a swept wing with two degrees of freedom in an incompressible flow is investigated in time - domain. The equations of the motion of an elastic wing are derived from Lagrange’s equations in time - domain. The wing is modeled as a cantilever beam rigidly connected to the root. Considering assumed modes of cantilever beam, aerodynamic forces and moments acting on the wing are derived using strip - theory in an unsteady incompressible potential fluid flow. The governing aeroelastic equations of the system have been introduced in dimensionless form. These equations are solved via a numerical method. Comparisons between obtained results and both available experimental data and the results of some cited references indicate a close agreement.
Volume 9, Issue 1 (4-2009)
Abstract
This paper is an attempt to investigate the impacts of macroeconomic variables on capital market in Iran using quarterly observations for the period 1991Q2 to 2007Q1. The macroeconomic variables considered in the model include GDP, prices, money and exchange rate. Arbitrage pricing theory is considered to model the variables. Standard unit root tests are conducted to investigate the order of integration in time series used in the study. Cointegration analysis is employed to estimate the model. More specifically, the autoregressive distributed lag (ARDL) framework and error correction model (ECM) are employed.
The results show that stock price has a positive effect on GDP and price level, but a negative effect on money stock and exchange rate. The estimated coefficient of the error correction term is 15 percent indicating the speed of adjustment in response to deviation from the long run equilibrium is relatively low.
Volume 9, Issue 1 (4-2009)
Abstract
This paper investigates the determinants of private investment in Iran over the period of
1382-2004. First, the variables are tested for unit root and then the long run private investment equation is estimated using cointegration technique. The variables considered in the model include GDP, government investment, inflation, infrastructure and institutions such as rules and regulations, property rights, corruption and social Securities.
The results indicate that GDP and infrastructure positively affect private investment while the institution factors such as rules and regulations, property rights, social securities and corruptions negatively affect private investment.
Volume 9, Issue 1 (1-2018)
Abstract
Aims: The chlorinated organic compounds are the most dangerous water pollutants in industrial sites. The aim of this study was to investigate the biodechlorination of chlorinated aliphatic compounds; trichloroethylene, dichloromethane, and 1,2- dichloroethane in aqueous solution, using aerobic Sphingopyxix ummariensis bacteria.
Materials & Methods: In this experimental study, aliphatic chlorinated compounds; diclormethan, trichlorethylene, and 1,2-dichloroethane with purity of 99.9% were used. A visible-ultraviolet spectroscopy was used to determine the cell growth from measuring the turbidity of the medium at 600nm. The amount of released chloride was measured by an Ion Selective Electrode (ISE). The live bacterial sample was inoculated into the Nutrient Broth medium and was incubated at 30°C and 150rpm for 24 hours.
Findings: The rate of dechlorination of diclormethan, trichlorethylene, and 1,2-dichloroethane by Sphingopyxis ummariensis were measured as 1.3, 1.05, and 0.63mg/l.h, respectively. The addition of glucose and yeast extract, as co-substrate, led to an increase in the cell growth and dechlorination rate up to 3.28, 1.67 and 0.90mg/l.h, respectively. During experiment, the highest dechlorination was measured at concentration of 2.5mM, at exponential growth phase.
Conclusion: Sphingopyxix ummariensis bacteria is capable of biodechlorination of chlorinated aliphatic compounds and can grows on trichloroethylene, dichloromethane, and 1,2-dichloroethane as a single carbon source and can decolorize them. This strain has the highest growth and removal efficiency in eliminating dichloromethane as the sole source of carbon along with glucose and yeast extract as co-substrate.
Volume 9, Issue 4 (12-2018)
Abstract
Aims: Electroencephalogram (EEG) is an important clinical test for the diagnosis of many brain diseases. The aim of this study was the analysis of electroencephalogram data during rest in patients with brain tumor.
Materials and Methods: In the present analytic observational study, EEG data of 44 patients with brain tumor (tumoral group) and 31 healthy subjects (healthy group) during rest were used. After preprocessing, the linear temporal features, linear spectral features of different frequency bands, and non-linear features of fractal dimension and entropy were extracted. Then, the distinction between healthy and tumoral groups based on extracted features was investigated, using the Davis-Bouldin statistic method, linear discriminant analysis (LDA) and nonlinear K-Nearest Neighbor (KNN) classification.
Findings: There was no significant difference between the the fractal kutz dimension and the waveform length of the two healthy and tumoral groups. Among other features, the sample entropy with a significant reduction in the tumoral group made the most distinction between the two groups (0.69 for the healthy group and 0.53 for the tumoral group). The highest classification accuracy of the two groups was 84%, using the sample entropy and KNN classification.
Conclusion: EEG signals have the potential to distinct the patients with brain tumor and healthy subjects. Nonlinear entropy features with more adaptation to the nonlinear nature of the brain shows a higher accuracy in the representation of the tumoral group. The less entropy of the tumoral group indicates less complexity in the brain processing of this group than the healthy group.
Volume 10, Issue 0 (8-2008)
Abstract
Objective: This study was conducted to evaluate the frequency of human hydatidosis in Kurdestan province by ELISA technique.
Materials and Methods: In this study the sera of 1979 individuals were collected from different area (cities and villages) of Kordestan province. The serum dilution of 1/400 was selected for ELISA test.
Results:The results indicated that 1.12% of the individuals from Kordestan province showed positive sera. The results also showed that in Kordestan 0.9 % and 1.42% of the people who live in the cities and villages had positive sera respectively. In this study 1.65% of female and 0.45 % of male were positive. From the obtained result we found maximum number of infected people were in the range of 30-40 years (1.59%).
Conclusion: According to the results obtained from this study the highest percent of infection was found in the city of Ivandarre, the reasone for this defference (1.69%) is due to the fact that most of the people who are involved in animal husbendary in the province live in this city.
Volume 10, Issue 1 (7-2020)
Abstract
The aim of this study was to investigate the effect of enamel plate on the frequency variation of theta, alpha and beta brain waves, with emphasis on gender factor as a demographic variable, to answer to following question: How is a cultural luxury item like a enamel plate changing in the comparison between males and females, considering bioelectric activity of the cerebral cortex is affected by the color element. This study is an applied research with semi-experimental design.
Electroencephalography was recorded in two regions of F3 and F4 in a commercial video of an enamel plate in four colors, blue, yellow, green and red; and in two groups of males and females. The data was recorded using Biofeedback System 2000 of the Sheffield Corporation during the commercial video demonstration. EEG data were processed using MATLAB software 2018 and statistical comparison was performed using SPSS software version 20 using multivariate analysis of variance analysis. Results showed that the color factor had no significant effect on the power of theta, alpha and beta band frequency. In contrast, the effect of gender was significant and the brain electroencephalography pattern of the participants without color was different in both males and females. The normalized electroencephalographic power of women in all colors was higher than mens’. Therefore, in a cultural luxury product, color cannot have a different effect on the electroencephalogram pattern of the frontal lobe of women and men, but the female cortex is more active than men when processing different colors.
Volume 10, Issue 4 (11-2021)
Abstract
The carob moth, Ectomyelois ceratoniae (Zeller, 1839), is the most critical pest of pomegranate in Iran. The sex pheromone components emitted by the virgin females were characterized by headspace solid-phase
microextraction (HS-SPME) and subsequently analyzed by gas chromatography/mass spectrometry (GC-MS). In this research, the level of individual variation in the female sex pheromone composition of the pest was studied. By extracting pheromone glands of females from different locations, the primary component, (
Z, E)-9, 11, 13-tetradecatrienal, and minor components, (
Z, E)-9, 11-tetradecadienal and (
Z)-9-tetradecenal, were identified. The following ratios were 10: 2.5: 2.1 (trienal: dienal: monoenal) in Kuhdasht,
10: 1.3: 0.7 in Tarom, 10: 1.3: 0.5 in Bajestan, 10: 1.2: 1 in Sorkheh, 10: 1.1: 0.9 in Ferdows, 10: 0.9: 1 in Neyriz, 10: 0.9: 0.9 in Khash and Meybod, 10: 0.9: 1.4 in Saveh, 10: 0.5: 1 in Behshahr, and 10: 0.45: 0.43 in Shahrreza. There was also a significant variation among the populations in response to wind tunnels and field tests. The discrepancies in these ratios show a possibility of a conspecific relationship among carob moth species in Iran. Findings led to a conclusion of
the monomorphic variation in sexual communication of the species.
Volume 10, Issue 45 (8-2022)
Abstract
Objectives, questions, and hypotheses
The aim of this study is to study and analyze the image of Boyer-Ahmad's ethnic heroes based on Boyer-Ahmad's epic hymns. The importance of such researches is that through them, one can understand many traditions, beliefs, values and the do's and don'ts of the owners of these poems. Epics as well as epic poems are very important and valuable in various aspects such as literature, preservation of national identity, transmission of values and patriotic themes to other generations, and addressing them in the field of literary research is also essential. It is based on this approach that this issue has been investigated in this research.
Result and discussion
One of the themes and manifestations of epic poems is the praise of national heroes who are accepted by all people by doing extraordinary deeds and capable warrior. In Shahnameh, Rostam is an example of an Iranian national hero and has always been respected. According to this tradition, the people of Boyer-Ahmad also praise the heroes in folk epic poems, who have led and guided them in various events, including wars. The heroes of these people were mostly capable warriors who showed their bravery in battles.
Among Boyer Ahmad ethnic heroes, we can mention Ki Lohrasb Batoli, Mir Gholam, Bibi Khan Qazi, Mullah Gholam Hossein Siahpour, Abdullah Khan Zarghampour and Naser Khan Taheri (Akbari, 1991). The most famous one is Ki Lohrasb and the most famous female warrior is Bibi Khan Qazi (Bibi Maryam plays the same role in Bakhtiari tribe). These heroes in folk poems and Boyer-Ahmad mourning odes, by unknown poets, have also been introduced and described (Shahbazi, 2019; Siahpour, 2005) and have a special place among the people of Boyer-Ahmad. Boyer-Ahmad's women usually choose the names of these ethnic heroes for their children, in order to preserve the memory and bravery of these heroes and transfer them to other generations (codes 9, 5, 3). A point that Bahman Beigi (1989) has also emphasized.
Before the battle, all Boyer-Ahmad's ethnic heroes boasted about breaking the spirit of the other side and put a lot of emphasis on their race. All of them fight against the Pahlavi regime (Reza Shah) and do not accept his policies towards tribes (Hosseini, 2002). Usually in folk epic poems and especially the mourning of Boyer-Ahmad's odes, Boyer-Ahmad's heroes are compared to lions. The reason for these similes is the transfer of the predatory spirit and the victory of this animal to the warriors. On the other hand, the main cause of such similes is the existence of mountain environments that make them hardworking, tolerant and strong people. Their most important weapons are mace, bow, mace with six prongs and shotguns.
Conclusion
After studying the subject of Boyer-Ahmad's ethnic heroes in their folk epic poems, many of the epic manifestations of the past can be seen in praising ethnic heroes, their weapons, including bows, maces and mace with six prongs, provocation of warriors and exaggerate in their description and the battles. One of the most important ethnic heroes of Boyer-Ahmad is Ki Lohrasb, the description of whom many folk epic poems have written included Mullah Gholam Hossein Siahpour, Abdullah Khan Zarghampour, Mir Gholam Shah Ghasemi, Vali Khan, Ali Khan and his wife Bibi Khan Ghazi and Nasser Khan Taheri are other ethnic heroes of Boyer Ahmad who all participated in various battles, they have played a significant role against Reza Shah's policies against the Boyer-Ahmad tribes. They have both fought and led the people. Most of these heroes, in order to provoke the people and their legitimacy and acceptance, boast before and during the battle and mention to their race, tribe and lineage. For this reason, Lohrasb, Ali Khan and Vali Khan have the title of Ki, a title that is specific to the Iranian Kiani kings. Their most important weapons are maces, bows and mace with six prongs, which show that they were the first weapons of their ancient to fight, and their background can be seen in Avesta and Shahnameh. The use of the shouting war song as well as the Shahnameh reading ceremony was the most important factor in inciting the warriors to war, and in addition to field data, this has been confirmed based on library reports; as we see in the time of Reza Shah and the Boyer Ahmad tribes.
References
A) Library
Akbari, H. (2002). Rejal Boyer-Ahmad. Fatimid
Bahman Beigi, M. (1989). Bukhara, my tribe. Agah.
Hosseini, S. (2002). Poetry, music and literature Kohgiluyeh and Boyer Ahmad. Fatimid.
Shahbazi, A. (2019). Boye Ahmad's epic verses or mourning odes. Bimonthly of Popular Culture and Literature, 7(1), 149-125.
Siahpour, K. (2005). Unequal battle. Historical Studies, 8, 171-207.
B) Field resources (interviewees)
Janipour, Keshvad. 80 years old. Rancher, Jalil Garden Village, Boyer Ahmad, Kohgiluyeh and Boyer Ahmad. Code 3.
Kohgiluyeh and Boyer Ahmad. Code 5.
Saberi, Nikrad 86 years old. Teacher, Pehun village, Rostam, Fars. Code7.
Shakibaei, Mehrdad 63 years old.Farmer, Biara village,Dena.
Volume 11, Issue 1 (5-2011)
Abstract
The macroeconomic situation, government and central bank intervention in economy accompanied by business cycle consequences resulted from world economy, can stimulate profitability of borrowers and cause high default rates of payments for banking systems. In such an atmosphere, having an estimated model helps us to better understand the relations among macroeconomic variables, the behavior of bad loans and credit risk. In this paper, we study the influence of macroeconomic shocks on the bad loans from 2000 to 2007. At first, we apply an ARDL model, since the exogenous variables of this model have endogenous characteristics as well; we attempt to utilize a VAR model to explain the dynamic behavior of these variables. Impulse-response function is also used as a stress testing factor to investigate the impulse effects of bad loans to economic shocks. Based on estimated models, we study the effects of economic shocks such as loans interest rate, government expenditures, oil price and liquidity on non-performing loans.
