Showing 12 results for Allahyari
Volume 7, Issue 1 (5-2015)
Abstract
Set in the realm of politics and religion in the Safavid period’s approaches, The Sadat have a significant presence in this era. This presence can be followed in specific and non-specific postions.in this context, Kalantar in the Safavid research was included as non-specific postions. Studies show that the presence of Sadat in this post ion is more comprehensive than in other non-specific jobs. This phenomenon has been observed even when inheritance was considered. This study is an attempt to provide statistical analysis and causal explanations to check the significant presence of Sadat in Kalantar position, so, extraction of the names of all Kalantar Sadat has been taken into account. The results show that Kalantar position with intermediate overlay (government-people) had a direct relationship with Siadat that contained social status and state function. So both Safavids and the then society in the equal opportunity used to choose Sadat for this job. This study further reveals in this phenomenon, inheritance is considerd.
Volume 11, Issue 1 (1-2022)
Abstract
Cotton bollworm, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae), is a cosmopolitan polyphagous pest. Researchers need a simple mass rearing procedure to study the life history, behavior, and feeding habits of insects. In the present study, effects of container type (Petri dishes or transparent cubic-containers), the form of positioning the containers (overturned or upright), and diet type (artificial diet or natural diet, i.e., chickpea plants) on the development and survival of neonate of H. armigera were assessed. Additionally, effects of container type and ventilation (air circulation in rearing containers) on development and survival of second to sixth instars, percentage of pupation, and adult emergence were assessed. Container type had no significant effect on the development and survival of the neonates and subsequent instars. More neonates survived to the second instar when reared in the containers held overturned, compared to those held upright. The neonates reared on chickpea plants had a shorter larval development and a higher survival rate than those reared on an artificial diet. The percentage of pupation and adult emergence of second instars reared individually in ventilated containers was higher than that of those reared in unventilated containers. As a food source for neonates, chickpea plants could improve the mass rearing of H. armigera.
Volume 12, Issue 2 (2-2021)
Abstract
Abstract
Upon the establishment of Zand government, social situation of Shiraz urban community which was affected by the ruling board entered a new phase. This social diversity led to some changes in the capital. One of the most important changes at this time was the formation of Kharabatian neighborhood and the activities of prostitutes therein. The neighborhood which started its activities following the social plans of the government left behind different changes in many aspects of the urban society of the capital. Therefore, the aim of the present study is to investigate the causes for the formation of this neighborhood and its social consequences in the urban society of Shiraz in the Zand era. The study followed a descriptive- analytical method and used the library data to investigate the research problem. The findings show that controlling and managing the political activists in Shiraz, managing the crisis-stricken society after the fall of Safavids, encouraging the activists to reconstruct and improve Shiraz along with the positive attitude of Karim Khan Zand to this group of females all were involved in the development of this neighborhood. Moreover, the whole kharabatian neighborhood provided a good income resource for the Zand government. One of the social consequences of creating this neighborhood is the disorder in the foundation of families. In addition, since this kind of social activity was in contrast with the social and religious beliefs of the people, it created some popular and legal abnormalities by some parts of the capital society.
Volume 12, Issue 2 (2-2021)
Abstract
Abstract
Social movements are a fundamental issue in theories of revolution that have sought to explain them because of the importance of different theories. Lashkar-e Bani Abbas raised the level of value expectations of social classes with egalitarian slogans, this was while the level of people's value ability did not change much and people suffered from frustration and relative deprivation. Important variables, including economic, religious, and participatory values, led to the expansion of these movements. the size of the movements also affected the control of coercion by the government and the opposition and it finally made the movements. The present article tries to focus on the formation and causes of the movements of Barazbandeh, Sanbad, Ishaq Turk, Ostadsis, Al-Muqna and Babak Khorramdin. Using the method of historical and sociological analysis and examining the content of historical and sociological works, in the light of the theory of relative deprivation, this article examines the formation and causes of these movements.
Volume 12, Issue 3 (Number 3 - 2010)
Abstract
A study of insect digestive enzymes makes sense given that the gut is the major interface between the insect and its environment. An understanding of gut and digestive enzyme function is essential when advanced methods of insect management such as application of enzyme inhibitors and transgenic plants are developed to control insect pests. The aim of the current research project was to study midgut anatomy, midgut pH and α-glucosidase activity in Sunn pest, Eurygaster integriceps Puton (Hemip: Scutelleridae). Sunn pest midgut is comprised of four distinct regions including first ventriculus (V1), second ventriculus (V2), third ventriculus (V3) and finally fourth ventriculus (V4). The study showed that the first three regions of the Sunn pest midgut are more acidic (pH= 5–5.2), the fourth region moderately acidic (pH= 6.2–6.4), and hindgut slightly acidic (pH= 6.5–6.8). Enzyme assay showed that α-glucosidase activity is present in midgut and salivary glands of adult E. intergriceps. The specific activity of midgut enzyme was 0.17 U mg protein-1 while the specific activity of the salivary glands enzyme was 0.033 U mg protein-1. Optimum temperature and pH values for α-glucosidase were determined to be 40-45°C and 5, respectively. Based on linear regression analysis of reciprocal p-nitrophenyl substrate (p-nitrophenyl α-D-glucopyranoside) concentration versus reciprocal α-glucosidase activity Km and Vmax were 17 and 0.9 mM p-nitrophenol min-1, respectively. The effect of different ion concentrations on α-glucosidase activity showed that Na+, K+, Mg2+, and Ca2+ ions exerted positive effects on the enzyme activity. Other compounds tested such as urea, SDS, Tween 80, Triton X-100 and EDTA had an inhibitory effect on enzyme activity.
Volume 13, Issue 2 (3-2022)
Abstract
Urban planning of Tehran until the period of Naser al-Din Shah continued in the style of urban planning of the Safavid period. This method only met the needs of a traditional city in various limited political, economic and social dimensions. From the time of Nasser al-Din Shah, Tehran as the capital of Iran in the Qajar period and in the face of the Western world became a platform for developments in the field of urban planning and a model for other cities in Iran in this field; However, these developments did not enter the city in its pure Western form and appeared in a mixed and influenced by the traditional Iranian society. Therefore, the aim of the present study is to investigate the impact of Western civilization and urban society of Tehran on the continuity and physical-spatial evolution of the city in the Naseri period. This research based on descriptive-analytical method has investigated this issue. The findings of this study show that the physical part of Tehran entered a new phase during the reign of Nasser al-Din Shah, influenced by Western civilization. These physical-spatial changes were not simply influenced by the modern Western world; Rather, indigenous cultural and artistic forces combined new influences with Iranian architecture. These developments were achieved on the one hand in the method of urban renewal in various dimensions and on the other hand in the quantitative dimension and the growth, reproduction and multiplicity of elements of the city.
Volume 18, Issue 3 (5-2018)
Abstract
Dispersion of oil pollutants is one of the important topics of great concern which should be modeled for a wide range of hydrodynamic systems such as seas and oceans. In this paper, the effects of using booms on the oil plume are simulated using the Smoothed Particle Hydrodynamics (SPH) Method. The open-source SPHysics2D code is developed into two phase by adding the effects of surface tension and an added pressure term to the momentum equation. Several problems of plume dynamics are shown, and the performance of the developed code is evaluated. Firstly, the rising pattern of an oil plume with the density ratio of 0.8 is simulated where the results are compared with the analytical solution. Then, the rising pattern of a plume with density ratio of 0.1 is simulated and the time evolutions of the rising velocity and center of mass are shown. The simulation of the cnoidal wave on beaches is conducted and compared with an available experimental result. Finally, the effects of a boom with different angles on the oil plume dispersion are investigated. It will be shown that the SPH method could be an optimized method for the numerical simulation of the complex problems such as water wave dynamics and two-phase flows.
Volume 18, Issue 5 (9-2016)
Abstract
The life history and predation rate were determined for all stages of female and male of Phytoseiulus persimilis Athias-Henriot fed on the eggs of Tetranychus urticae Koch ˗ as the preferred prey-stage ˗ on rose (cv ‘blarodje’) leaf discs under laboratory conditions at 25±1°C, 75±5% RH, and 16 L: 8 D hour photoperiod. According to the age-stage, two-sex life table model, the intrinsic rate of increase (r), finite rate of increase (λ), net Reproductive rate (R0), Gross Reproductive Rate (GRR), and mean generation Time (T) were 0.296 d-1, 1.345 d-1, 33.48 offspring, 53.87 offspring and 11.83 d, respectively. Moreover, average number of T. urticae eggs consumed by different stages/sexes of P. persimilis was calculated based on the age-stage, two-sex life table model and indicated that the consumption rates increased from nymph to adult in both sexes. Also, our results showed that females consumed prey eggs 11 times more than males. The net predation rate (C0) and transformation rate from prey population to predator offspring (Qp) were 363.54 mite eggs and 10.86, respectively. The results showed that P. persimilis can successfully survive and reproduce on T. urticae eggs on rose.
Volume 19, Issue 5 (9-2017)
Abstract
One of the major obstacles to agricultural development in Jordan is the weakness of extension programming which is still traditional and based on personal judgement. The aim of this study was to examine the attitudes, adoption barriers and in-service training needs of Public Extension Agents (PEAs) towards the adoption of Needs-Based Extension (NBE). An instrument to assess attitudes, barriers and training needs was designed and used to collect data from 73 PEAs in Jordan. Face and content validity were confirmed by a panel of experts, and internal consistency of the study scales were demonstrated by alpha coefficients ranging from 0.75 to 0.90. Parametric and nonparametric methods were used to analyze the data. The results showed that most PEAs had positive attitudes towards adopting NBE services, but adoption was constrained by internal and external barriers; supporting culture to NBE, finance and skills to undertake surveys and need analysis. The involvement of public extension staff in the survey contributed to in-service training and the application of NBE programs. Priority areas for training were determined using weighted discrepancy scores, with the most important being information technologies, agribusiness management and conducting needs assessment respectively. Study tours and professional training were perceived as the most important training methods. There were few significant differences among the PEAs with respect to the attitude and competence scales. These results indicate the need to undertake needs assessments of PEAs to improve extension programming in Jordan.
Volume 20, Issue 3 (5-2018)
Abstract
Prey suppression by predators depends on effective predator: prey release ratios. The effectiveness of Phytoseiulus persimilis Athias-Henriot and Typhlodromus bagdasarjani Wainstein and Arutunjan was evaluated at different predator: prey release ratios for suppression of Tetranychus urticae Koch populations on cucumber plants in the microcosm condition based on three experiments. In the first experiment, 7 days after T. urticae releases, the most reduction in the different stages (densities) of T. urticae and the most increase in both P. persimilis and T. bagdasarjani were observed in predator: prey release ratio of 1:4 followed by ratios of 1:10 and 1:20. In the second experiment, one day after T. urticae release at predator: prey release ratio of 1:4, there was no significant difference between predators effect on the decline of T. urticae stages (densities). In this case, more T. bagdasarjani at all stages was observed on the plants in comparison with P. persimilis. According to the third experiment, 7 days after T. urticae release, there was no significant difference between predator: prey ratio of 1:4 of P. persimilis and 1:2 of T. bagdasarjani on T. urticae suppression. In this case, more P. persimilis was observed on plants in comparison with T. bagdasarjani. Our study demonstrates that the most suppression of T. urticae populations occurred in predator: prey ratio of 1:4 for both predators. Based on our findings, we suggest that P. persimilis and T. bagdasarjani can be released at a ratio of 1:4 for successful control of T. urticae on cucumber.
Volume 21, Issue 1 (1-2019)
Abstract
The egg parasitoid, Trichogramma evanescens Westwood, is used for inundative releases in biological control programs against the tomato leaf miner, Tuta absoluta Meyrick, in agro-ecosystems. One of the most important host-parasitoid interactions is functional response that its type and parameters are affected by different factors including host plant characteristics. In this research, functional response of T. evanescens to different egg densities (2, 4, 8, 16, 32, and 64) of T. absoluta was investigated in a growth chamber (26±2°C, 50±10% RH, and 16:8 hours L:D photoperiod), on three varieties of tomato (Mobil, Riogrande, and Early Urbana-703). Type of functional response was determined by logistic regression and its parameters, i.e. searching efficiency and handling time, were calculated by nonlinear regression model using SAS software. Functional response of this parasitoid was type III on Mobil and Riogrande and type II on Early Urbana- 703. Searching efficiency (a) for each host density was 0.0368, 0.0736, 0.1472, 0.2944, 0.5888, and 1.1776 on Mobil, and 0.0374, 0.0748, 0.1469, 0.2992, 0.5984, and 1.1968 h-1 on Riogrande varieties, respectively. Also, on Early Urbana-703, the attack rate was 0.1045 h-1. The handling time was 1.0276, 1.1017, and 1.3289 hours with maximum parasitism of 23.3, 21.7, and 18.06 eggs on these varieties, respectively. It is suggested that physical structure of Early Urbana-703 variety may interfere with the parasitoid’s performance, resulting in an impaired searching efficiency and parasitism ability. Some applied aspects of the findings are discussed.
Volume 24, Issue 6 (11-2022)
Abstract
Water hardness can negatively affect the efficiency of pesticides. This study aimed to determine the effect of water hardness and adjuvants added to spray solution on the efficiency of insecticides. Three insecticides, namely, malathion, acetamiprid, and spiromesifen, were mixed in well water samples at 1,869, 645, and 265 mg L-1 hardness, standard, and deionized water, and applied against the second instar nymph of Bemisia tabaci using leaf dip method. In another experiment, Zero-7 at 150 ppm and Arkan at 180 ppm as additives were added to water with 1869 and 645 mg L-1 hardness, separately. LC50 values showed that the toxicity of malathion, acetamiprid, and spiromesifen was 40, 157, and 84 times less in hard water (1,869 mg L-1 hardness) than deionized water. The efficacy of malathion, acetamiprid, and spiromesifen was 13, 65, and 39 times less when they were diluted in water with 645 mg L-1 hardness than deionized water. Malathion provided 37.28 and 18.59% greater toxicity when applied in hard water containing Zero-7 and Arkan than water without the adjuvants. The efficacy of acetamiprid was, respectively, 16.93 and 18.68% greater when it was applied in hard water containing Zero-7 and Arkan compared to water without the additives. Zero-7 and Arkan in hard water enhanced the efficacy of spiromesifen by 10.26 and 13.68% compared to water without adjuvants. Generally, the toxicity of the insecticides on B. tabaci was considerably reduced at the highest levels of water hardness. In contrast, adjuvants overcame the antagonistic effects of cations in hard water.
