Showing 557 results for Khan
Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract
Among the challenges of language acquisition, developing writing proficiency is widely acknowledged as particularly demanding. Learners must not only select appropriate vocabulary but also use it effectively within a specific context. However, the emphasis on writing skill development should not solely lie in memorizing grammatical rules. Rather, grammar should serve as a tool to facilitate clear and effective communication of ideas. Consequently, prioritizing and strategically selecting essential grammar rules for instruction can significantly enhance and expedite the acquisition of writing skills. This research employs a descriptive-analytical method and utilizes a questionnaire to investigate the potential effects of streamlining Arabic grammar instruction on facilitating and accelerating the development of writing skills in Arabic among Persian undergraduate students majoring in Arabic Language and Literature. To achieve this objective, the study employed a researcher-designed questionnaire distributed among a sample of 16 Arabic language teachers and experts. This instrument aimed to identify the relative importance of Arabic grammar components across three proficiency levels: beginner, intermediate, and advanced. Informed by expert opinion, the research proposes a tiered approach to Arabic grammar instruction. At the beginner level, priority is given to mastering structural order and interrogative particles. The intermediate level focuses on relative nouns, causative constructions, and the mood system. Finally, advanced learners concentrate on verbal mode and aspects. Additionally, the findings highlight the experts' emphasis on introducing similar Arabic and Persian grammar rules in the early stages of education, and Arabic-specific rules at higher levels.
Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract
Giles, Goat-Boy is a black comedy to bite everyone. Embodied in a postmodern fabulation, Barth’s sense of humor allows him to create a political allegory on any structure of power that claims to save humanity. GILES, a hybrid of a machine and a goat, is tasked with the mission to lead the so-called academic society through instrumental intellect. But he can only go so far as not to create a conflict of interest between the ruling powers. The pattern used in creating Giles is an imitation of the classic patterns in creation and journey of a hero, except that Giles is destined to appear as a scapegoat against the positivist Sphinx of Time. Such an approach begs the main question of the research: How ideological systems sacrifice their heroes to secure their interests? This hypothesis is also in line with Frankfurt School’s critical theory, which considers the capitalist system to be a violation of freedom and social values. The intellectuals such as Horkheimer and Adorno consider man to be a victim of objectification and alienation arising from social and political conflicts. They also believe that hegemonic systems have humiliated man with false pleasures. Just as Giles fails to reform the most powerful ruling system, WESCAC, so Barth symbolically paints a bleak picture of human destiny in modern society today. The purpose of the research is to raise human awareness about the harsh laws that are the ominous products of instrumental intellect, as one of the defining elements of capitalist system.
Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract
Every country has different languages. Some are standard, while others are non-standard. This research looks at how often people in Iran use standard and non-standard language. It also looks at other factors like age, gender, education, occupation, and income. It also looks at how people feel about different language groups. The data were collected from 314 people in 10 Iranian ethnic groups living in Tehran. They were analyzed using SPSS software and Foucault's theories of power and discourse silence. The results show that people over 50 use their native language or dialect more because they have more social power. Men have replaced non-standard language with standard language. As education level rises, people use less non-standard language. Non-criteria type is more common among retirees than other occupations. Those with a strong financial status have replaced non-criteria type with the criterion type. Those with a weak financial status have the most non-criteria type speech silence. Speakers of languages with strong attitudes toward language use are less likely to speak up in many social situations. They often use non-standard language instead of standard language.
Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract
The Quranic word "raht" is associated with two semantic domains: kinship and community, and it encompasses various meanings. The present study seeks to address the issue of why the word "raht" has multiple meanings and what its primary meaning is. Commentators and linguists have not provided any answer to this issue. These meanings are believed to have originated from potential twin roots in the Afroasiatic language family and the reasons behind the polysemy of this word by examining the processes of semantic construction of the word, along with its usages in Arab culture. This will be achieved by utilizing historical sources and then analyzing the word in the context of relevant Quranic verses, using a descriptive-analytical method. In the end, it has been established that the origins of this word can be traced back to two possible root meanings in ancient languages, one related to "combining" and "hand" and the other associated with "digging." These meanings have evolved over time and have shaped the various interpretations of the word. The association of common concepts of "group" and "collective" in classical Arabic and genealogy texts is derived from the concurrent meanings of "combination" and "symbol of the hand" in one branch of the word's historical roots and Considering the historical and cultural context of this word and its usage in the context of Quranic verses, it becomes clear that "Raht" is the smallest group within a tribe, often associated with unity and cooperation in facing or dealing with turmoil and challenges.
Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract
This study investigates the instructional strategies Vietnamese EFL lecturers prefer to employ to teach productive skills of general English in online and face-to-face teaching environments. Thirty-eight lecturers from 6 Vietnamese universities participated and responded to a questionnaire with 29 close-ended questions detailing instructional strategies. Four of the participants were invited to join the semi-interview about the reasons for their preference for instructional strategies. The collected data were analyzed with descriptive statistics for Quantitative data and content analysis for qualitative data. The findings indicate that the most favored strategy in both teaching environments is describing pictures while opinion sharing and group discussion are much more favorable in the face-to-face than in the online teaching environment. Additionally, certain strategies are preferred in the face-to-face setting over instruction in the online setting and vice versa. Some primary reasons for lecturers’ preference for instructional strategies were identified and participants gave some recommendations of choosing appropriate strategies for teaching productive skills via interviews. These findings highlight EFL lecturers' preferences in selecting instructional strategies to teach English productive skills in the two teaching contexts and underscore implications for choosing proper instructional strategies.
Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract
This research is aimed to capture EFL teachers’ use of technology in Task-Based Language Teaching (TBLT) by focusing on the variety and intensity of tasks in teaching reading. Driven by the survey research, the data were collected from 71 teachers of English as a Foreign Language (EFL) in Indonesia and analyzed descriptively. The findings show that the EFL teachers perceived that the use of technology in TBLT in teaching reading is important and it can enhance students' language learning experiences. Technology offers engaging materials and activities that aid reading comprehension. Furthermore, EFL teachers' use of various tasks and resources may indicate a need for continuing professional development to improve digital literacy skills and pedagogical strategies of English teachers in EFL context. Although the findings of this survey give an insight into the data of English teachers’ use of technology in TBLT in terms of variety and intensity in teaching reading, this survey has its limitations with regard to the numbers of participants. This research highlights the dynamic relationship among technology, TBLT, and reading instruction in the EFL context, and suggests the need for continued research and exploration of best practices in this area. The current study succeeded in adding new empirical studies related to the variety and intensity in pre-reading, whilst-reading and post-reading activities of EFL teachers enacting teaching reading with the use of TBLT.
Volume 0, Issue 0 (ARTICLES IN PRESS 2024)
Abstract
The present study evaluated the effects of reducing agricultural tariffs in different scenarios on food security and macroeconomic variables that using a computable general equilibrium model and data from Afghanistan's social accounting matrix. The effects of reducing tariffs were evaluated at 80%, 60%, 40%, 20%, and 100% (full liberalization). The results of this study showed that imports and consumption of cereals, fruits, vegetables, and livestock are gradually increased for households. Additionally, the increased purchasing power of households led to an increased demand for food, which improved food security and ultimately the health of households and society. Therefore, support for special facilities in the field of eliminating tariffs on agricultural products is essential.
Volume 0, Issue 0 (ARTICLES IN PRESS 2024)
Abstract
Smallholder farmers in northern Punjab struggle to adopt sustainable practices like essential oil extraction, despite their potential to improve livelihoods. Core elements from theory of planned behavior, technology acceptance model, and innovation diffusion theory are amalgamated to develop an adoption model, which is subsequently analyzed using structural equation model. The results unveil significant mediating effects involving attitudes (perceived usefulness, easiness), normative concerns (social influence), and indicating maximum variation (R2) regarding by-product preparation (0.76) and steam distillation (0.65). The model successfully accounts moderating effects of socioeconomic variables, indicating a robust association among latent variables. Hence, improving the adoption behavior among smallholders necessitates a focus on socio-psychological and socioeconomic factors.
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Volume 0, Issue 0 (Articles accepted for Publication 2024)
Abstract
Aim and Introduction
Ecological footprint accounting is composed of two metrics, the “demand-side” (ecological footprint) and the “supply-side” (biocapacity). While the ecological footprint calculates the demand for natural assets in global hectares, biocapacity symbolizes the supply capacity of nature to meet this demand with the same unit of measurement. Ecological deficit also shows the difference between ecological footprint and biological capacity. Globally, the degree of ecological deficits continued to expand over the last decade due to the increase in EF and reduction in biocapacity, which is caused by the following: increasing consumption of fossil fuel energy, overexploitation of natural resources, unsustainable production methods, and economic activities.
Iran is one of the countries that has a weak environmental performance. According to the Global Footprint Network, Iran's ecological footprint exceeded 333% of its biological capacity in 2022. Iran's ecological deficit, which was - 0.55 global per capita hectares in 1961, has increased by 554% to 2.50 global per capita hectares in 2022, and the destruction and pollution of the environment in Iran have reached unsustainable levels. Therefore, the analysis of the determinants of environmental quality can provide insights into the design of appropriate environmental policies in Iran.
In this regard, the environmental effects of dependence on crude oil have attracted considerable attention. Crude oil is an important and largest source of energy, especially for developing countries such as Iran. It is a fossil-based fuel and a major source of carbon emissions in the world. Hence, many studies have linked oil price shocks to environment quality. In contrast to oil-importing economies, where oil price increases encourage a shift to cheaper and cleaner alternative energy sources, the environmental policy issue in oil-exporting countries is entirely different. Indeed, a fall in oil prices may be associated with a decreased investment in environmentally friendly energy sources. By comparison, an increase in oil prices revealed a reluctance to diversify the economy away from its reliance on non-eco-friendly fossil fuel energy.
Based on the explanations above, the main purpose of this article is to investigate the asymmetric impact of scaled oil price impulses on the environmental Load Capacity Factor (LCF) in Iran using the Non-linear Autoregressive Distributed Lag (MATNARDL) approach. The paper intends to make the following contributions to the literature. Firstly, this article is the first to look into the effect of oil prices on the LCF in Iran by applying asymmetric methodologies. Secondly, it is the first study with a reverse load capacity factor as an environmental sustainability indicator. Thirdly, this paper applied the advanced and newly developed MATNARDL for asymmetric and nonlinear analysis to provide a more robust result that exhibits relevant policy implications. Finally, this innovative study investigated the effects of oil prices on the LCF in Iran between 1961 and 2022 in the framework of the LCC hypothesis.
Methodology
The study compiles annual data for the period 1961-2022 for Iran from three different sources. According to Statista, OP represents average annual OPEC crude oil price (in US dollars per barrel). The data are obtained from the World Bank, GDP per capita, (constant 2015 dollars), Energy Consumption (EC) as kg of oil equivalent per capita, Ecological Footprint (per capita, gha) and LCF (the load capacity factor) are obtained from Global Footprint Network. Because the LCF includes biocapacity in the numerator and EF in the denominator, it allows for simultaneous environmental assessment on the supply and demand sides. A higher LCF indicates a better environment. The current paper's economic functions are illustrated in Equations (1):
LnLCFt=fLnOPt, LnGDPt,LnGDPt2,LnECt,εt (1)
The main objective of this study is to examine the major, medium and minimal scales of positive and negative changes in oil price on the environmental quality index in Iran. For this purpose, the MATNARDL is used as an estimator to examine the effect of minor to major adverse shocks and minor to major positive surprises in the explanatory variable on the explained variable.
Findings
The bounds cointegration test results confirm a long-term relationship in the asymmetric model. The estimation of the model has been performed by categorizing the positive and negative impulses of the oil price in three small (quantiles less than the τ30 threshold), medium (quantiles between the τ30 and τ70 thresholds), and large (quantiles greater than the τ70 threshold) scales in the form of MATNARDL approach. The results indicate that in the long term, small scale of positive (negative) oil price impulses had a positive (negative) and significant effect on the load capacity factor; while these impulses have a negative effect on the load capacity factor in the long term in both medium and large scales. Based on other results, energy consumption has a negative and significant effect on the load capacity coefficient, and the environmental hypothesis of the load capacity curve (LLC) in Iran is confirmed.
Discussion and Conclusion
Based on the obtained results, it can be said that the effect of oil price on the load capacity factor in Iran is asymmetric. Among positive impulses, only with increase in small scale of oil price, we can see an increase in load capacity factor and environmental sustainability in the country. Moreover, the positive impulses of the oil price on both medium and large scales lead to the increase of environmental instability by prioritizing economic achievements and activities over environmental issues
Volume 1, Issue 1 (3-2012)
Abstract
Reproductive performance and life expectancy of the two-spotted spider mite (TSSM), Tetranychus urticae Koch were determined on seven eggplant cultivars (Isfahan, Dezful, Shend-Abad, Neishabour, Bandar-Abbas, Jahrom and Borazjan) at 25 ± 1°C, 60 ± 5% R.H. and a photoperiod of 16:8 (L:D) hours. The results revealed that the TSSM gross hatch rate varied from 59% on Bandar-Abbas to 83% on Dezful. The gross fecundity rate was 59.726, 31.430, 31.443, 14.461, 19.328, 16.035 and 20.560 eggs/female and the net fecundity rate was 25.804, 17.496, 15.139, 7.620, 5.931, 7.526 and 11.947 eggs/female on the above-mentioned cultivars, respectively. The highest and lowest value of the net fertility rate was 20.735 eggs/female on Isfahan and 3.495 eggs/female on Bandar-Abbas, respectively. Also, the gross fertility rate was the highest on Isfahan (47.994 eggs/female) and the lowest on Bandar-Abbas (11.390 eggs/female). The values of the mean eggs per day varied from 2.040 to 6.560 eggs/female, which was minimum on Neishabour and maximum on Isfahan. The life expectancy of one-day-old adults of the TSSM was estimated to be 7.550, 8.380, 5.820, 4.850, 5.440, 5.330 and 3.950 days on the above-mentioned cultivars, respectively. Comparison of the reproductive parameters of the TSSM on the examined cultivars revealed that Isfahan was the most susceptible cultivar and Neishabour was the most resistant cultivar to this pest. Using resistant host plants is one of the most important components of an integrated pest management program.
Volume 1, Issue 1 (3-2013)
Abstract
Aims: Complication of diabetes mellitus (DM) is the most important impediment resulted from uncontrolled blood sugar. The patients should be educated on controlling their blood sugar and promoting their preventive behaviors, in order to reduce complications. The aim of the present study is to determine the effects of the BASNEF Model-based educational programs on Blood sugar Control (Diabetes Type 2), in Nader Kazemi Clinic, Shiraz-Iran.rnMethods and Materials: This is a perspective and quasi-experimental intervention study, the research population is type 2 diabetics of 40-65 years diagnosed over 5 years. 100 patients fulfilling the inclusion criteria participated in the study. They were randomly divided into experimental and control groups. The instruments for data collection were: a questionnaire established based on the BASNEF Model (Belief, Attitude, Subjective Norm and Enabling Factors), a self reporting checklist related to the patient practice and a checklist for recording the patients' HbA1c and Fasting Blood Sugar (FBS) levels. Content validity method was used to evaluate the questionnaire's scientific validity. The questionnaires were completed by 20 type 2 diabetics to measure reliability (other than those who participated in the study). The faulty ones were removed and the results checked with %95 reliability (Cronbach's ά Coefficient was 84%).rnBoth groups completed the questionnaires and checklists; the results were documented before and three months after intervention.rnThe patients of the experimental group participated in 6- session educational classes in the first month of intervention and once more two months after, with 2-session meeting classes as the intervention follow up. Data analysis was conducted using SPSS software, chi square-test, T-test for independent samples, matched T-test, and repeated measures ANOVA.rnFindings: concerning the mean scores of age, T-test for independent samples showed no significant difference between the experimental group (SD=7.52, Mean=54.40) and control group (SD=6.72, Mean=54.24).rnThe findings indicated that the mean scores of BASNEF Model variables were significantly increased in the experimental group compared to the control group, after intervention. Also, behavioral control of blood sugar, HbA1c rate (8.65% before intervention and 7.47% after three months) and FBS levels (207.08 before intervention and 124.2 after three months) improved significantly among the experimental group, compared to control group.rnConclusions: Applying the BASNEF Model is very effective in developing an educational program for diabetics, in order to control their blood sugar and enhance behavioral controlling blood sugar. Besides, follow up education on controlling and monitoring is highly recommended.
Volume 1, Issue 1 (11-2009)
Abstract
adopted here is Social Distance Theory. According to this view, the more social distance among people the less they influence each other. From this viewpoint an increase in social distance among kinsfolk leads to a decrease in mutual influence and this, in turn, affect the emigration tendency. This study is aimed at the investigation of the relationship between kinship solidarity and emigration tendency among educated people. The theoretical framework
Based on this theoretical foundation, we have suggested that 4 main variables, the size of kinship network, the strength of kinship relationship, the frequency of kinship relationship, and the profundity of kinship relationship, have negative influences on educated people’s tendency to emigrate. A sample of social sciences and electrical engineering students of the University of Tehran has been surveyed and the empirical data have been analysed both in description and explanation levels.
The results indicate that all of the above mentioned variables affect emigration tendency negatively and significantly. Also, our findings suggest that, generally speaking, a negative correlation between the above independent variables and dependent variable of emigration tendency is predictable. In particular, two variables (the strength of kinship relationship, and the profundity of kinship relationship) explain 35% of variances of dependent variable of the tendency to emigrate.
Volume 1, Issue 1 (4-2013)
Abstract
One of the important subjects in Sohrab Sepehri’s poems is the philosophy of education and his attention to the basic aspect of human existence. This subject is important because Sepehri had a great shift in his literary and practical life since 1340’s.
The goal of research: This research shows that Sohrab Sepehri was under the influence of phenomenological educational approaches and there are great similarities between Fromm’s and Sepehri’s views in the poetical works like Shargh-e-Andooh (East of Sadness), Seday-e-Pay-e-ab(The Sound of Water’s Foot), Mosafer (Traveler), Hajm-e-Sabz (Green Space), and Ma Hich Ma Negah (We Nothing, We Look). According to this research, like Fromm, childhood has a philosophical concept for Sepehri. Childhood equals intuition and direct understanding of phenomena, gaining personal experience and freedom. Satisfying the human instincts is the first stage of gaining individuality, and maturity is the time of overcoming instincts, thinking dependence, escaping from imitation. Fighting with habits, opposition to imposed education, admiration of loneliness and acceptance of death show great similarities between Sohrab Sepehri and Erich Fromm’s views.
Volume 1, Issue 1 (Spring & Summer 2014)
Abstract
God sent the holy Qur'an to guide human beings. One of the ways forenjoying the holy Qur'an’s guidance, is fluent translation of it, and also without ambiguity. Criticizing the translation of the holy Qur'an is one of the ways and strategies for reachingsome kinds of translations with the above features. This article studies the translation of the mogharebe verb "Kada/Yakadu" in the translation of Makarem Shirazi, Fouladvand, Khoramshahi and Karim Zamani. The translators have used in their translation "kad" as "it was about" and "ya-kad" as "it is about". Fouladvand and Karim Zamani in their translation of these two verbs, in addition to the above equivalents, have also used "it was almost to happen" for "kad", and "it is almost to happen" for "y-kad". Some of the mentioned translators have used "it is not about" or "it is about" for "la ya-kad" and "lam yakad" and it is wrong. The correct translation of these two verbs is "cannot".
Volume 1, Issue 1 (2-2016)
Abstract
Background: Osteoporosis is one of the most common metabolic bone diseases. The purpose of this study is to investigate the effect of a walking education program based on the health belief model (HBM) on osteoporosis among women. Material and Methods: In this quasi-experimental research design, 120 patients (60 experimental and 60 control),who were registered with the health centers in Fasa City of Fars Province, Iran, participated in the study in 2014. A questionnaire consisting of demographic information and HBM constructs was used at pre-intervention, immediately after their intervention, and then six months later. Bone mineral density (BMD) was recorded at the lumbar spine and femur prior to and six months post-intervention. Data were analyzed using SPSS19' through 'chi-square test, independent t-test, repeated measure ANOVA at a significance level of 0.05. Results: Immediately and six months after the intervention, the experimental group showed increased in knowledge, perceived susceptibility, perceived severity, perceived benefits, perceived barriers perceived, self-efficacy, perceived internal cues to action and walking performance compared to the control group. Six months after the intervention, the value of lumbar spine BMD T-Score in the experimental group increased to 0.127, while in the control group it decreased to -0.043. The value of the hip BMD T Score in the intervention group increased to 0.125 and in contrast, it decreased to-0.028 in the control group. Conclusions: This study showed the increased knowledge and walking behavior regarding walking benefits could improve bone density. Therefore, HBM model can be a basic framework for designing and 'carrying out' educational interventions for women’s osteoporosis.
Volume 1, Issue 1 (2-2016)
Abstract
Background: Musculoskeletal disorders (MSD) represent one of the most frequently occurring and costly occupational issue in nursing. The nursing profession is one of the most stressful occupations today, because of the quantity and diversity of risk factors associated with the work environment. The aim of this study was to examine the relationship between burnout syndrome and musculoskeletal disorders. Material and Methods: In this cross-sectional study a questionnaire survey was carried out among 415 nursing personnel in five educational hospitals in Hamedan, Iran. Data were collected through two unnamed questionnaires including Maslach Burnout Inventory, Visual Analogue Scale (VAS). Results: Statistical analysis showed that the most commonly painful regions among the nurses were lower back (5.53%), left foot (5.08%), and head and neck (4.43%), right foot (4.90%), right knee (3.84%) and left knee (3.74%). The lowest pain, were found to be in right and left elbows (1.99%) and (1.91%), respectively. Also emotional exhaustion, depersonalization and personal accomplishment has significant correlation with musculoskeletal disorders (P = 0.000, r = 0.122). Conclusions: The results showed high prevalence of MDS among Iranian nurses that could be due to emotional exhaustion and depression.
Volume 1, Issue 1 (Winter 2018)
Abstract
Abstract
Aims: Affected by natural and human phenomena, the spatial order forms the urban network. In a balanced urban system, due to hierarchical functions and activities in different cities, and fair provision of services to the existing population, there are hierarchical links between cities. The aim of this study was to investigate the urban network based on functional analysis and factors affecting the urban network deformation in Khorasan Razavi province.
Instruments and Methods: Using survey research method, the present descriptive-analytical study was conducted in 2015 among 118 experts of the provincial government, Road and Urban Development Office of Khorasan Razavi province, Governorate, Municipalities, University Jihad of Ferdowsi University, Geography professors of Ferdowsi University of Mashhad, and mayors of Khorasan Razavi province; In this study, convenience sampling method was used. The research tool was researcher made questionnaire. Factors affecting spatial imbalance were evaluated through structural equation modeling and confirmatory and exploratory factor analysis, using SPSS 22 and Lisrel 8.52 software.
Findings: Economic, infrastructural, and political factors had the greatest effect on spatial imbalance with factor loading of 0.77, 0.75, and 0.75, respectively.
Conclusion: Mashhad is at the highest and Bajgiran is at the lowest level in terms of development factors. Among the factors influencing the spatial imbalance, the changes in the country's division in the provincal level (change village to city), centralized system governance, the lack of attention to the role of the middle cities in division of labor (political factors), the focus of activities in metropolises, disproportionate allocation of credits at the provincial level, the focus of roles in Mashhad (economic factors), and the focus of superior educational and health-care services (infrastructural factors) have a more effective role.
Volume 1, Issue 1 (Spring and Summer 2024)
Abstract
The theory of the responsibility to protect was approved in 2005 in the output document of the United Nations Summit (A/RES/60/1) and in 2011, it was included in the Security Council Resolution 1973 regarding military intervention in Libya. The theory of the responsibility to protect implies the commitment of the international community to end the worst forms of violence and crime in humanitarian crises and internal armed conflicts. This article by using the qualitative method and document-library sources, books, articles and reports and internet notes, dealing with NATO's military intervention in Libya in 2011, which led to airstrikes, the creation of a no-fly zone, and ultimately the change of Muammar Gaddafi's regime, criticizes its application in Libya.The findings of the article show that although the theory tries to fill the gap between the former obligations of UN member states under international humanitarian law and human rights with this reality that the human population facing the threat of genocide, crimes against humanity, ethnic cleansing and crimes against humanity must be supported, France, the United States and NATO have exploited the 1973 resolution for their political-military goals and have caused the stoppage of the development of the theory and the skepticism of the international community towards the goals and intentions of the world powers in the application of the theory and as a result of the design of the new approach of responsibility during support.
Volume 1, Issue 1 (Spring and Summer 2024)
Abstract
The relationship between Iran and Africa has had a long history including various aspects specially cultural issues. Their relationship, despite its ups and downs, has continued to work. The cultural relationship between the two countries has undergone many changes. These transformations have occurred both in Iran, Africa as well as the whole world. This study intends to examine and evaluate this era and the nature of these relations before and after Islamic revolution in Iran. The main question raised in this regard is that considering the good historical back ground, what has been the orientation of Iran's foreign policy in these periods? Studies point out that the relations between Iran and African countries affected by domestic or international approaches have had ups and downs. Apparently, during Pahlavi's regime, in spite of some measures taken to establish relations with African countries, these relations didn't have coherent policy and the relations with the North African countries has had more priorities over relations with sub-Saharan countries. Moreover, Iran’s relations with some countries such as the Apartheid government, or its military and financial support for some governments have provoked skepticism towards Iran among the other African countries, and has led to the cut off of the relations with Iran. However, victory of the revolution in Iran created a new development in relations with Africa, and considering the approaches and goals of this revolution, relations with Africa has been placed in the highest foreign policies of IRI. Although, even in this age, these relationships have gone under lots of ups and downs at the time of the ruling of various governments in IRI.
Volume 1, Issue 2 (6-2012)
Abstract
Biochemical characteristics of α-amylase in the digestive system and head glands of Cryptolaemus montrouzieri, a key predator of citrus mealybug, Planococcus citri (Pseudococcidae), were studied. The major isoform of α-amylase with the same molecular weight was detected in both gut and head glands loaded on polyacrylamide-starch gel electrophoresis. Moreover, a minor band with much lower intensity was observed in zymogram analysis of gut. Results showed that the specific activity of α-amylase from head glands (0.89 ± 0.02 μmol/min/mg protein) was significantly more than that of digestive system (0.76 ± 0.01 μmol/min/mg protein) in common condition (temperature equal to 25 ± 1 oC). The optimal pH and temperature for α-amylases activity were determined to be nearly 4 and 50°C in digestive system and 6 and 60 °C in head glands, respectively. EDTA (Ethylenediamine tetra acetic acid), Mg2+, Na+, Co2+, Fe2+ and Ca2+ inhibited the enzyme activity but Ba2+, Zn2+, Hg+ and K+ enhanced enzyme activity in digestive system. EDTA and all tested metal ions except Ba2+ inhibited the enzyme activity of head glands. Detectable levels of α-amylase activity in the insect reflect adaptation of the coccinellid for using starch granules or sugars (honeydew; sugary excreta of homopterans; and nectar) as a source of food in addition to predatory habits.