Showing 562 results for Rod
Volume 0, Issue 0 (2-2024)
Abstract
The simile formation process is based on the combined function of the two paradigms of selection and combination; Selection of phenomena and their combination, which is done with the purpose of conceptualization and Meaning production. Each of the simile components in both axes of selection and combination act as a network in the meaningful communication; Therefore, the communication of the simile components creates a special semantic system. In this system, each of the components is considered as a sign and plays a certain semantic role. The issue of this research is to investigate the symbolic system of simile and explain the process of signification of its components. The aim is to determine how a discourse system emerges in the form of analogy and the process of producing meaning in it. For this purpose, it is shown in the analytical-explanatory method how the poet, in the role of the subject, interacts with the “simulated” as an object in a special situation, and the result of this interaction is the mental perception that is determined by the “simulated to”. The result of the research shows that simile has a symbolic system and this system is associated with discursive, phenomenological-perceptual aspects and dynamic flow of meaning.
Volume 0, Issue 0 (2-2024)
Abstract
The present study aims to investigate the meanings and productivity of derivative suffix «i» in Persian language using Plag's (2003) point of view. Data collection was conducted by library method and analysis of findings was done by descriptive-analytical method. The sampling included three works from the 5th, 8th, 11th centuries, and the contemporary period. Then, the frequency of using «i» to express different meanings was investigated in each period. The findings indicate that in the 5th and 8th centuries, noun-forming «i» was more productive than adjective-forming «i». In the 11th century and the contemporary period, adjective-forming «i» was more productive than that of noun-forming «i». Also, the productivity of the adverb-forming «i» has been less than adjective-forming «i» and noun-forming «i» in all periods. Considering the different adjective-forming meanings of this suffix, the highest frequency in the 5th, 8th and contemporary periods was related to the adjective "place" and in the 11th century, it was related to the adjective "belonging to a thing". Among the different meanings of the noun-forming «i» in the 5th century, the noun "state indicator" had the highest frequency and in the 8th, 11th and contemporary periods the "simple" noun was the most frequent. Among the different meanings of the adverb-forming «i», the highest frequency was related to the adverb "state" in the 5th century, "scale, amount and size" in the 8th and 11th centuries, and "place" in the contemporary period. The paper also explains possible causes of differences in this suffix's productivity.
Volume 0, Issue 0 (2-2024)
Abstract
Despite all the efforts of professors and students, learning the four language skills of French in academic institutions has always been accompqnied by challenges. One of these skills is written production, in which students make numerous mistakes. We believe that identifying and analyzing areas of error can be effective in improving their writing skills. In the present study, using an analytical-descriptive method, the written productions of a group of students on a B1 level topic were examined. The data collection tool is the DELF B1 evaluation grid with ten criteria for writing correction. The participants in this study show that 42 percent of students had very good and good averages, and 58 percent had average and weak scores. The target population of this study performed acceptably in only three skills-coherence and logical structure, the ability to present events, and adherence to the topic-out of the ten criteria in the evaluation grid. However, they have not yet achieved the necessary skills in the other seven criteria. The areas of errors revealed in this research could serve as topics for further studies to extract and analyze errors in each domain.
Volume 0, Issue 0 (2-2024)
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 (1-2024)
Abstract
Nowadays, entrepreneurship and knowledge-based companies are highly considered. This study aimed to investigate the factors affecting Psychological Capital (PSyCap) in two groups of agricultural and non-agricultural knowledge-based companies from Science and Technology Park (STP) of Fars province, Iran. The population included the companies located in the STP incubators in Fars province. The data were collected from 238 participants (100 from agricultural and 138 from non-agricultural companies) as a sample through a questionnaire. Regarding the effect of services and facilites provided by STPs on the performance of companies at incubators, it is suggested that such services and facilities become more specialized and reinforced. In addition, it is emphasized to consider the necessity of educational and operational strategies in order to strengthen the entrepreneurial orientation, social capital, and PsyCap among members.
Volume 0, Issue 0 (1-2024)
Abstract
Rural handwoven carpet weavers, particularly in the context of handmade silk carpet production, grapple with significant challenges concerning recognizing all stakeholders and establishing timely connections. These challenges have a substantial impact on the adoption of innovation in carpet production and the overall enhancement of productivity. This research was conducted to scrutinize the communication network of carpet weavers within the Knowledge and Innovation System (KIS) of handmade silk carpet production in rural areas. Data were gathered through interviews with 270 rural households in Zanjan province, specifically in the Tarom, Khodabandeh, and Zanjan counties, utilizing a structured questionnaire. Social Network Analysis (SNA) in UCINET was employed to examine the interactions among these actors, and graphical representations were created using Net Draw. The results revealed that the network's density varied across different levels, showing weakness in some cases, moderate strength in others, and strong connections in select instances. The connections of carpet weaving families with other actors within the KIS were predominantly localized. Among these families, those utilizing the home-based wage production method exhibited the most extensive interactions. The individuals designated as "FMs" (likely referring to family members) and "WNVKRs" (possibly local experts) demonstrated the highest degree of connection and influence within the network of weavers' interactions
Volume 0, Issue 0 (1-2024)
Abstract
The vagaries of monsoon rains severely affect the growth and yield of little millet (Panicum sumatrense) in semi-arid India. Continuous sole cultivation of little millet depletes soil nutrients, reduces crop productivity, and fails to ensure a stable income for farmers. A crop mixer is an alternate option to cope with climate variability and sustain soil fertility in the sole crop little millet areas. Among crops, pulse crops are a viable mixer for improving soil fertility, productivity and farmers' net income. Field studies were conducted in 2016, 2017, and 2018 at the Dryland Agricultural Research Station, India. Little millet was raised as the main crop, with red gram intercropped in ratios of 4:1, 6:2, and 8:2. Black gram, moth bean, and horse gram were sequentially cultivated after the little millet harvest. Biometric, yield attributes and yield, soil nutrients and nutrient uptake were measured. Intercropping of little millet and redgram in a 4:1 combination recorded higher grain yield (511 kg ha-1) and straw yield (1632 kg ha-1) of little millet. Similarly, little millet grain equivalent yield and production efficiency were also higher (730 kg ha-1 & 4.5 kg ha-1 day-1) in the 4:1 combination with sequential horse gam. Regarding soil fertility, a 4:1 combination with sequential horse gram resulted in significant nitrogen build-up (157.3 kg ha-1) and phosphorus (9.7 kg ha-1) and potassium uptake (37.6 kg ha-1). Intercropping red gram with little millet at a 4:1 ratio, followed by sequential planting of horse gram, enhances rainfed little millet pulse productivity and improves soil fertility in semi-arid Alfisol.
Volume 0, Issue 0 (1-2024)
Abstract
Trissolcus vassilievi (Mayr) (Hymenoptera: Scelionidae) is one of the most important egg parasitoids of the common sunn pest (CSP), Eurygaster integriceps Puton (Hemiptera: Scutelleridae) in Iran. In this study, the fitness of two populations of T. vassilievi was studied on two populations of hosts in terms of life history parameters. Two populations of T. vassilievi were selected: 1/ Tabriz (as a temperate area), and 2/ Varamin (as a subtropical area), as well as for CSP. Moreover, regarding that outcrossing between populations can produce progeny with superior characteristics, the progeny of reciprocal crosses between original populations also were examined on a single host. The crosses between the two populations caused 13.9-18.5% higher net fecundity than maternal populations which suggests fecundity to be a function of maternal phenotype. The intrinsic rate of increase showed minor differences among treatments which varied between 0.291±0.003 to 0.305±0.003. The partial advantage of the Varamin wasps over the Tabriz ones and the crosses over the original populations was obvious. Such differences may be used to obtain more efficient parasitoids in augmentation programs.
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 (3-2012)
Abstract
Abstract The aphid parasitoids, Aphidius colemnai Viereck and A. matricariae (Haliday) (Hymenoptera: Braconidae: Aphidiinae) have high potential as the most effective biological control agents for controlling the cotton aphis Aphis gossypii Glover (Hemiptera: Aphididae). In this investigation, the effect of five constant temperatures (10, 15, 20, 25 and 30 °C) on the reproductive parameters was studied at 65 ±5% relative humidity and a photoperiod of 16L: 8 D hours In this study, the newly laid (one- day old) eggs were reared on third instar nymphs of cotton aphid, and the pupal and adult stages of the parasitoids were recorded daily, until the last individual was found dead. The experiments were carried out with 15 replications at each temperature. The results revealed that the gross fecundity and fertility rates were significantly different at all tested temperatures for both species (P
Volume 1, Issue 2 (7-2023)
Abstract
Hydrodynamic factors have been proved to effectively influence the high-performance heap leaching, hence this study evaluates them on column bioleaching of low grade uranium ore. Response surface methodology (RSM) was applied to predict the behavior of effective parameters particle size, irrigation rate, aeration rate and their interactions in the bioleaching process. Obtained results showed that the best model for the recovery of each metal was the quadratic model. The maximum values of uranium recovery at the optimum condition, (d80
5, mm particle size, 0.34, l/m2/min irrigation rate, and 210, l/m3/min aeration rate), were 63.85%. The results from the model and the experimental data show good agreement.
Volume 1, Issue 2 (7-2023)
Abstract
Some bacteria can survive in conditions in which even extremophiles cannot survive. In this study, the conditions of contamination of mine-waste extremophiles with other bacteria was studied on the laboratory scale. At the first step, the acid-producing extremophile bacteria were isolated from mine tailings and characterized using a biochemical protocol. The extremophiles survived at the pH from 0 to 8.5 and temperature from ‒ 70 °C to 90 °C. After the complete growth and isolation of active colonies of the acidophilic bacteria in solid medium, their pollution possibility were examined in the laboratory. The characterization of contaminating microorganisms was performed through polymerase chain reaction (PCR) and 16s rRNA gene sequencing. The polluting bacteria were isolated from the acid-producing bacteria using a nutrient broth liquid medium in a sterilized condition for 1 week, which reached an anaerobic condition after a while. The significant growth of acidophilic bacteria in an anaerobic condition required the 9K medium containing Fe2(SO4)3 and elemental sulphur. The results showed that the contaminating bacteria of extremophiles included Bacillus cereus (strain 1), Bacillus sp. (TS3) and Bacillus oryzaecorticis (WJB138), enduring the anaerobic conditions in a nutrient broth medium.
Volume 1, Issue 3 (9-2013)
Abstract
Mnemiopsis leidyi population activities first were recorded during the coastal observations in 2001 in which its population considerably increased afterward and now sustained the southern Caspian Sea. Maximum summer-autumn M. leidyi abundance was recorded in euphotic layer in 2002 (851±85 ind.m-3) and maximum biomass was in 2001 with 48.1±14.4 g.m-3) while minimum were in aphotic layer. In years 2003 to 2011, M. leidyi abundance and biomass sharply declined to 1-843 ind.m-3 and 0.07-37.7 g.m-3, respectively. The length-frequency distribution of Mnemiopsis showed larval, juveniles and transitional stages that made up 98.6% of the total population. In the southern Caspian Sea, Acartia tonsa was the highest number of mesozooplankton species (36 species) which decreased tenfold after Mnemiopsis invasion during 2001-2010. Fecundity experiments of Mnemiopsis showed the average of 8 eggs. day-1, with a maximum of 35 eggs.day-1which increased with increasing body length. The main food was larger amounts of zooplankton prey such as copepodites and adult of A. tonsa. It seems the sharp decreased of Mnemiopsis abundance could be related the decreasing of ova reproduction; and food ability is the main reasons of M. leidyi sustained in the southern Caspian Sea. The objective of present study was to provide information about parameters influencingthe M. leidyi decreased after initial bloom invasion in the southern Caspian Sea.
Volume 1, Issue 3 (10-2008)
Abstract
Volume 1, Issue 3 (10-2014)
Abstract
Background: Age-related differences in the ethoxyresorufin O-deethylase (EROD) activity of CYP1A1 and its inducibility in rats may determine the toxic potential of acetaminophen. This study was carried out to compare the effects of acetaminophen (APAP) and β-naphthoflavone (βNF) on CYP1A1 activity in young and adult rats.
Methods: For this purpose, young and adult rats (n = four / group) were treated with different doses of APAP. Likewise groups of young and adult rats were treated with a single dose of β-naphthoflavone (βNF, 67 mg / kg b.w). EROD was measured in microsomal fraction using resorufin as the substrate.
Results:The results showed that a single i. p. injection of APAP (25 mg / kg B.W.) failed to alter liver microsomal EROD in young and adults. Whereas, in adults treated with 250 and 450 mg APAP / kg B.W, liver CYP1A1 was elevated to about 45 and 60% respectively. The rate of CYP1A1 induction in young rats with single dose of APAP (450 mg/kg B.W) was approximately 32%. Induction in CYP1A1 was noticed 4 h after APAP injection and returned to normal levels in 24 h. The inducibility of CYP1A1 in rats treated with a toxic dose of APAP was comparable to the data obtained from animals treated βNF, 67 mg / kg b.w.
Conclusion: These results together with our previous reports indicate a similar pattern of changes in CYP1A1 in both the age-groups treated with toxic doses of APAP may suggest that the inducible CYP1A1 can equally contribute to protection against liver damage in young and adult rats.
Volume 1, Issue 4 (12-2023)
Abstract
Today, financial development is one of the main drivers of economic growth and development. Since developing countries are focused on the rapid expansion of economic growth, they have taken steps toward the development of financial markets. However, the consequences of financial development on environmental quality are not clear. In addition, since the emission of carbon dioxide caused by production is significantly different from the emission of carbon dioxide caused by consumption in some countries (such as China). Therefore, this article examines the impact of financial development on the consumption-based CO₂ emissions for a panel of 17 developing countries during the period of 1990-2019 with a Panel- Quantile approach. Empirical findings show that the effect of financial development on consumption-based CO₂ emissions is positive and significant in all quantiles. In addition, this study considers gross domestic product, rental rates of natural resources, trade openness, and globalization as control variables. The results of this study provide new evidence for policymakers to maintain environmental quality by focusing on the link between financial development and consumption-based CO₂ emissions.
Volume 1, Issue 4 (12-2023)
Abstract
Aggregation and concentration of industries and the production of more complex products due to economies of scale can cause technology spillover. The development of industrial and complex processes requires energy, and the use of energy causes carbon emissions. Now this question arises, what are the effects of technology and industrial agglomeration on the environment? The purpose of this research is to evaluate the effect of economic complexity and industrial agglomeration on carbon emissions in a panel of emerging economies during the period 1990–2022. For this purpose, first, the industrial agglomeration was calculated based on the location entropy index, and then, in the new panel approach, the method of moment quantile regression (MMQREG) was used to investigate the effects of economic complexity and industrial agglomeration on carbon emissions. The results showed that increasing the economic complexity index has different effects on carbon emissions. The results of parameter estimation showed that industrial agglomeration increases carbon emissions in high quantiles. The results show that economic growth and energy consumption increase carbon emissions in all quantiles, and urbanization helps to preserve the environment. The results of Dumitrescu and Hurlin's panel causality test show a two-way relationship between industrial agglomeration and carbon emissions and a one-way relationship between economic complexity and carbon emissions.
Volume 1, Issue 4 (12-2023)
Abstract
Detergents are a part of human life and are consumed for different purposes, particularly hygiene. In recent years, the detergent industry has experienced significant changes as a result of environmental concerns, the availability, and cost of raw resources and energy, consumer preferences, demographic and sociological trends, as well as global economic and political factors. Several review papers have been published on detergents, but no bibliometric research has been conducted in this field. This study aims to assess the trend of detergent research and show the related hotspots by conducting a bibliometric analysis based on 37650 published articles from Scopus from 2000 to 2022. Numerous significant aspects of these articles, such as subject categories, journals, authors, countries, and keywords, were examined systematically. According to the findings, the number of detergent-related papers has increased significantly over the past two decades. The United States was the leading country in terms of both quality and quantity, followed by China and Brazil. In addition, Detmann, E. from Sweden was the most productive author. Keyword analysis suggests that current research has focused on the development of effective cleaning products that are safe for humans and the environment.
Volume 2, Issue 1 (3-2013)
Abstract
Medicinal plant powders have traditionally been used as grain protectants against stored-product insect pests. In this study, insecticidal activity of Carum copticum L. and Cuminum cyminum L. powders was assessed on adults of Sitophilus granarius L. and Tribolium confusum Jacquelin du Val. Experiments were carried out on wheat at 27 ± 1 ºCand 55 ± 5% r. h. The mortality increased with increasing concentration level and time exposed to each concentration. For S. granarius, 7 days and in case of T. confusum 14 days exposure time was sufficient to obtain considerable mortality. For example, 3500 mg/kg of C. copticum 7 days after treatment caused 80% mortality in S. granarius; while for T. confusum 29% mortality was achieved and increased to 100% after 14 days. Therefore, it can be concluded that adults of S. granarius were more susceptible than T. confusum to plant powders. Also, according to the findings, C. cyminum powder had more insecticidal efficacy than C. copticum on both insects’ species. For S. granarius, 950 and 2700 mg/kg powders of C. cyminum and C. copticum was enough to cause ca. 50% mortality after 5 days, respectively. In case for T. confusum, 3200 and 4400 mg/kg of the plant powders caused the same mortality after 7 days. Findings of the present study show that the plant powders could be applied for grain protection in small-scale storage facilities.
Volume 2, Issue 1 (4-2014)
Abstract
This article first studies the process of the formation of the art of emulation by examining its development and evolution in both Arabic and Persian literature. Then the article would compare and contrast the emulated poetry in Arabic and Persian. The hypothesis is that Persian emulation, like many other poetic forms, comes from Arabic literature. Thus the fundamental question is “How to examine the nature and quality of the similar and common features and issues of Persian and Arabic emulation?”. Thus the literal and literary senses of emulation are first studied, and then its representative examples in Arabic and Persian poetry and prose are listed. In this section, such subjects as echo, parody, burlesque, takhmis, and tadhmin are relevant examples that are introduced as the common devices in both literary traditions. In the manner of a conclusion, an analytical treatment of these writings is conducted, taking into consideration their positive and negative implications and effects.