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Aim and Introduction
Today, the environment is considered as one of the most important pillars of sustainable development, and the development of other economic and social sectors depends on its sustainability and proper functioning. Environmental pollution has become one of the main challenges of countries. Environmental health is currently one of the most critical concerns of people and officials round the world. Almost all managers and decision makers believe that this national wealth should be protected not only for the current generation but also for future generations, since the pollutants caused by industries are highly costly and detrimental to health.
Active industries are one of the main sources of environmental pollution. One of the necessary conditions for economic progress and the introduction of extensive structural changes in economic and technological fields is industrialization and industrial development. In the production process, using production inputs whose main source is the environment, in addition to desirable outputs such as consumer goods, undesirable outputs such as environmental pollutants are also produced. If the number of outputs is not controlled and disproportionate, the losses from undesirable outputs will be greater than the benefits of desirable products in such a way that damages to the environment would be irreparable and sustainable development less likely to be achieved.
One of the most important concerns related to industrialization is the effects and environmental consequences of industrial activities. Therefore, achieving the necessary solutions to control such consequences is vitally important. Minerals are essential for human survival, but their extraction and processing are not environmentally friendly practices which contribute to problems such as soil erosion, air and water pollution. On the other hand, mineral sector is one of the largest energy consumers which has active contribution to air pollution and global warming. The main purpose of this study is to investigate the economic effects of Gol Gohar mine in Sirjan. For this purpose, it is intended to determine the type and amount of pollutants released from this complex, and also to determine the amount of the green tax of the complex as a solution to reduce pollution and examine the social welfare resulting from reducing pollution.
Methodology
In this study, the economic effects of environmental pollutants of Gol Gohar Iron Mine in Sirjan (Southeastern Iran), is investigated using the input distance function model from 2001 to 2022. Through calculating the shadow price of pollutants, a criterion for determining the green tax is determined, and then the amount of social cost resulting from the emission of pollutants is calculated.
The shadow price of the undesirable output is the cost that the producer must bear if they plan to reduce the production of the undesirable output. In fact, it can be interpreted as the marginal cost of reducing pollution for each producer. Therefore, the shadow price of the desirable output is considered positive and equal to the market price of that output, but the shadow price of the undesirable output must be estimated to be less than zero.
Findings
The products of Gol Gohar Iron Ore Complex in Sirjan, include granulated iron ore, iron ore concentrate and pelletized in the production process. The most greenhouse gases and air pollutants are related to carbon dioxide (CO2), sulfur oxides (Sox), nitrogen oxides (Nox) and particulate matter (SPM). According to the obtained results, the average shadow price for air pollutants in Gol Gohar complex for CO2, Sox Nox, and SPM was calculated as 11.15, 3,074.5, 5,529.62, and 1,875.62 rials per kilogram respectively. Moreover, the average total social costs resulting from the production of Gol Gohar Sirjan Complex was calculated as 92,710 billion Rials according to the amount of pollution produced over the period.
Discussion and Conclusion
The estimation of environmental costs is actually an introduction to providing solutions for internalizing and reducing environmental costs, using the input distance function model and the shadow price of environmental pollutants in the industrial and mineral complex of Gol Gohar, Sirjan. The title of the largest producer of iron ore in the country was calculated, and the social cost resulting from the emission of pollutants was also evaluated. Finally, in this study, solutions and mechanisms for reducing environmental costs have been proposed.
Considering that the ability to absorb pollutants by the environment is limited, the shadow price of pollutants, which represents their real social cost, should be taken into consideration. The damages should also be determined based on the shadow price of the pollutants. In other words, the amounts of pollutant emission should be calculated and while taking into account the allowed limit of pollutant emission and shadow prices, based on a legal plan, the environmental costs should be reimbursed. Taking such measures would surely require more studies and capable executive management system

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After the Cold War, the People's Republic of China emerged as a major economic power in the world. Today, this country has been able to spread its influence, especially economically, to all parts of the world. One of the strategic points where this country is in strategic competition with Europe and America is the African continent. This study attempts to present the causes and contexts of China's influence in Africa. Therefore, considering the fact that many studies have been conducted on China's actions and influence in Africa so far; in order to establish a theoretical consensus among the researches, this study tries to explain the strategic and important reasons for China's influence in Africa in a theoretical framework. Therefore, the philosophy of interpretive research has been chosen to achieve the appropriate model in this field with a qualitative approach and content analysis techniques. It should be noted that among the 298 articles containing China's geopolitical goals and interests, 8 articles were extracted according to the KASP rubric scoring system. The final result indicates that one of the most important geopolitical interests in Africa are economic goals pursued according to the soft principles and ideological cultural structure of China.
 

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In a taxonomic study of the subfamily Phasiinae (Diptera: Tachinidae), seven species and the three genera Opesia Robineau-Desvoidy, Subclytia Pandellé and Xysta Meigen are recorded for the first time from Iran. The diagnostic characters, distributional data along with the photographs of species are presented. Taxonomical positions of the genera and species are discussed.

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The East Asian psyllid, Acizzia jamatonica (Kuwayama, 1908) (Hemiptera: Psyllidae) is newly reported from Iran. This is also considered as the first record of the genus Acizzia Heslop-Harrison and the subfamily Acizziinae for the country. The psyllid was collected from Persian silk tree, Albizia julibrissin Durazzini (Fabaceae), in Rasht, Guilan province, in July 2013. A brief taxonomic diagnosis is provided to facilitate its recognition.

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The aim of this study is to investigate the relationship between the structure and function of an osteocalcin derived peptide on hydroxyapatite nanocrystal formation. For this purpose, , a natural motif sequence consisting of 13 amino acids present in the first helix of osteocalcin was selected based on its calcium binding ability and synthesized in both acidic and amidic forms using solid phase method. Circular dichroism (CD) and electron microscopy were performed to examine the structure and function of synthesized peptides. Moreover, the effect of these peptides on the viability of osteoblast cells was evaluated. Electron microscopy analysis showed the formation of plate-like HA nanocrystals in the presence of amidic peptide. In contrast, amorphous calcium phosphate was formed in the presence of acidic peptide. CD spectra analysis confirmed the random coil structure with lower molar elipticity for amidic peptide. In addition, the amidic peptide significantly increased the proliferation of osteoblast cells. It is concluded that increased bioactivity, which only occurred in amidic peptide is attributable to C-terminal amidation. It is also proposed that peptides with the ability to promote HA formation have the potential to be utilized in hard tissue regeneration high bioactivity and biocompatibility.

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Aims: This article discusses the formation of the concept of "performance" and its expansion in urban studies, focusing on the rhetorical field of "city strolling" and the effect of this concept in forming new perceptions of the city and urban practices. The present research was conducted with the aim of evaluating the impact of the concept of "performance" in urban discourse and introducing its effectiveness in the study of urban phenomena and the design of urban public spaces.
Methods: The research method is qualitative. Based on library research, the formation of this concept and its effects in the field of urban studies have been analyzed.
Findings: City strolling (especially Debord's "Dérive") due to its internal capacities, has been the origin of the concept of performance, which has not only changed the relationship between the city and its residents, but also has been effective in the emergence of new practices and forms of behavior in the city. "Dérive" imposes elements such as play, show, intervention and situation to the city system and reads the city not based on the previous dominant narrative, but based on the experiences of the activists.
Conclusion: Special attention to daily practices and affairs, fleeting encounters, action processes and social interactions in the context of the city requires an approach that can decipher the functional logic of these activities. Performance, both as a kind of behavior and as a kind of analogy and efficient method, has shown and proved its potential in city studies.
 

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Some plant extracts have been reported to exhibit antimicrobial properties. Plant based pesticides appear to be an alternative for the synthetic pesticides because of their less dangerous impacts. The objective of this study was to assess the inhibitory activity of Brassica napus water extract on mycelial growth of six phytopathogenic fungi Rhizoctonia solani, Phythophtora drechseleri, Pythium aphanidermatum, Verticellium dahliae, Fusarium oxysporum, and Gaeumannomyces graminis. Antifungal activity test was performed by disc diffusion method. Concentrations of 100 and 50 ppm had the highest and the lowest inhibitory effects on all studied species respectively. The shoot extract (SE) was significantly exerted higher antifungal activity than root extract (RE). At 100 ppm, V. dahliae (17.02% inhibition by RE) and F. oxysporum (50% inhibition by SE) were the most sensitive species however, R. solani (1.8 and 15%) was the most resistant fungus to both extracts. Active compounds of B. napus extract were determined by high performance liquid chromatography (HPLC). Phenolic compounds had the highest concentrations in extracts and are probably the main cause of the mycelial growth inhibition. Application of canola aqueous extract or incorporation of canola in crop rotation program can be considered as a method for management of some soil-borne phytopathogenic fungi.

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Aims: The main goal of the upcoming research is to explain the principles and spatial qualities of campuses based on the environmental preferences of female students.

Methods The nature of the research is qualitative and exploratory based on the methodology of content analysis and semi-structured in-depth interviews with a total of 40 female students of the faculties of literature and humanities and basic sciences in each of the two studied universities of Tehran and Shahid beheshti is done.

Findings: According to the narrative of female students, eight criteria of urban location, university campus structure plan, faculty architecture plan, likeability, university brand, attention to the dignity and rights of female students, the attractiveness of university activities and events, and the importance of hangout in the university are among the environmental qualities. It is effective in improving the presence of female students in university campuses.

Conclusion: Based on the environmental preferences of women, in addition to physical factors, non-physical factors are also effective in the presence of women in university campuses. In addition, the space may have a suitable physical quality, but it is gendered in a way that gives the woman the feeling of being subjugated and under control. For this purpose, the physical qualities of university campuses are necessary and not sufficient to promote the presence of girls.

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One of the main priorities of knowledge management researchers is motivating people for sharing their knowledge. Although some believes that knowledge is the power, it seems that knowledge has now power on its own but what make it powerful is that part which share among people. The purpose of this study is to investigate the role of social capital and behavior control as influencing factors on tacit knowledge sharing of staff. Data was collected using a close questionnaire. According to literature, a model was designed and tested to indicate the effect of staff tacit knowledge sharing among work groups, social capital view, and behavior control. Finally, results from SEM and regression analysis showed that social capital has positive effects on tacit knowledge sharing intention through the affect based-trust, shared value, and internal control variables. Tacit knowledge sharing intention, on tacit knowledge sharing behavior is greater when external control is higher in compare with internal control.  

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Problem: Factors such as the change in the emotional connection of humans with the urban space, events and places, have led to the reduction of place attachment and the aggravation of its consequences in Tehran. 
Target: In this research, analysis of key criteria affecting the use of color palettes as an important factor in the identification and improvement of the spatial attachment of urban spaces in Tehran has been considered.
 authors try to redefine the importance and significance of the urban public arts event in urban spaces, identify the feasibility of performing street music in social environments. The green corridor of Shahrchai and the Khayyam Jonubi sidewalk of Urmia city have been studied.
Method: Interpretive Phenomenological Approach (IPA) is used as a qualitative approach, which aims to provide detailed reviews of the personal life experience of the color perception of the city, and the key criteria affecting the use of the palette. Color schemes are presented in spatial correlation in the framework of causal layered analysis (CLA). Due to the limitation of available samples, a targeted non-random sample was used to identify eleven people with conditions to identify and analyze the approaches and criteria.
Result: The findings of the research showed that the criteria of color preferences, spatial context, citizens' participation, mental image, color perception in the decision-making and urban management system are among the most important criteria affecting the subject of the research. The importance of using color in promoting attachment is influenced by the environmental context, which can lead to the observance of principles such as the presence of citizens in the context of participation. In order to improve the situation of spatial attachment in connection with the color palettes of Tehran metropolis, strategies have been presented in the fields of urban management and design, citizens' participation, and creativity and innovation.

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Currently, one of the main problems of cities is the emptying of the spirit of life in them and in their urban spaces. For this reason, providing vitality and urban vitality has become one of the main concerns of urban management systems. Today, in developed countries, attention to the presence of people in urban spaces plays a key role in the design and planning of cities, and the important key to achieving sustainable, successful and lively cities is to pay attention to the role of people and their needs. In modern urban development, what should be placed at the top of all planning and design matters is to provide a humane and dignified environment for the presence of citizens. Managers and urban planners all over the world are trying to face urban problems and problems with an integrated look at all dimensions in cities, provide different approaches for the development of today's cities in order to respond to the new demands and expectations of the present age. One of the new approaches and concepts in today's urban planning is the smart city and the use of new information and communication technologies (ICT). A city that is 24 hours a day and the affairs of the city are going on in it all day and night. A smart city is a citizen-centered city in which information and communication technology (ICT) is used for better efficiency of existing resources and facilities, improving the quality of life of citizens and moving towards sustainable urban development. The process of this research, based on the descriptive-analytical method and with the help of library tools, examines the opinions related to the smart city, its dimensions and indicators. The results of this research show that the use of modern information and communication technologies in the urban spaces of the smart city can play a significant role for the presence and interactions of citizens, and as a result, the vitality of urban spaces. The urban space where vitality indicators are placed in the dimensions of a smart city and in addition to complying with the principles of a smart city, it includes the promotion of vitality in urban spaces.

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In the present study, which is based on the material collected from Southern part of Caspian Sea, Iran during 2013- 2016, one parasitoid species of the genus Coccobius Ratzeburg was identified as Coccobius pistacicolus (Yasnosh, 1968) (Hym: Aphelinidae). This species, which is reported for the first time from Iran, was collected in Rasht, Guilan province, and reared from Lepidosaphes pallida (Maskell) (Hem.: Diaspididae) on Ficus carica (Moraceae). Diagnostic characters of C. pistacicolus are provided. 

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Backgrounds: Toxoplasma gondii is a zoonotic parasite of increasing concern to humans and animals. Considering the side effects of drugs used to treat toxoplasmosis, it is essential to find alternative drugs.
Materials & Methods: In this study, colchicine and propranolol at four concentrations (1, 5, 10, and 15 µg/mL) were added to the RPMI medium containing peritoneal macrophages and incubated for 60 min, Then tachyzoites were added to the medium, and the efficacy rates of colchicine and propranolol in inhibiting tachyzoites entry into macrophages were evaluated after 30 and 60 min. For in vivo assay, one group received no drugs, and the second group was treated with colchicine and propranolol at different concentrations for different durations.
Findings: The in vitro experiment showed that treatment with 15 mg/mL of colchicine and propranolol for 60 min following tachyzoites addition was the most efficient method to inhibit tachyzoites penetration, indicating the efficacy rates of 80.20%±1.20 and 89.97%±1.30, respectively (p< .05). Based on the in vivo test, pretreatment with 2 mg/kg of colchicine one hour before tachyzoites injection had the best inhibitory effect (70.32%±4.07). Also, pretreatment with 2 mg/kg of propranolol 90 min before tachyzoites injection (78.54%±1.99) induced the best inhibitory effect (p< .05).
Conclusion: According to the results, colchicine and propranolol could inhibit tachyzoites entrance into nucleated cells in vitro and in vivo. In this study, the most efficient concentrations and times for using these substances were determined.
 

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Todays, Entrepreneurship is considered as the Economic Development engine and all countries attempt to develop it in their countries. With respect to the high importance of entrepreneurship and the necessity of its development in our country, this research is aimed to study and design the organizational structure of entrepreneurship in Iran. In this research, using the comparative studies of sucessful entrepreneurship centers and with considering the theorical fundaments of designing organizational structure and local and reginal conditions of I. R. Iran, the appropriate organizational structure of entrepreneurship centers has been designed.

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The present study, as a research in the field of language and gender, aimed at investigating the Persian spoken by women in Kermanshah city based on Lakoff’s dominance approach. Research in the field of language and gender began by Robin Lakoff (1973, 1975). She postulated that the language of women is different from men. According to her, women have a tendency to use the linguistic features that reflect and reinforce a subordinate role in society’s power structure. These linguistic features include "hedges", "indirect requests", "tag questions", "fillers", "and empty adjectives “and” up talk". She further suggested that women use "super polite forms" and have a "poorer sense of humor" than men. The purpose of this study was to investigate, describe and categorize the specific features in women’s speech. It further analyzed the impact of age on the frequency of using these speech features. The data of the present study were collected using questionnaires and interviews from 90 urban middle-class Persian-speaking women of Kermanshah in three different age groups with diploma or no academic degree. The authors of this study, in addition to examining the language of Kermanshahi women in line with Lakoff’s approach and explaining them based on "Freud's defense mechanism theory", succeeded to add several other features based on the science of psychology. These new and innovative speech features which were pointed out in the present study are: "childlike speech and tone", "stretched sounds", "histrionic language", "avoidant language", and "animism". The research findings were analyzed quantitatively using chi-square test, and qualitatively adopting the framework of Freud's defense mechanisms theory. The findings of the study demonstrate that age creates a significant difference in the frequency of using most of these speech features. Save for the two features of "rising tone in statements" and "tag questions", all the other features of Lakoff's approach and the features discovered by the researchers exist in women's speech, with different frequencies though, and can be generalizable to the population at large.
The table below presents both group of features of women’s language by Lakoff and the authors:
 
Features of the Persian language spoken women (Kermanshahi)

Features included in Lakoff's approach	Features Discovered by Researchers
Hedging	Childlike speech and tone
Color terms	Stretched sound
Empty adjectives	Avoidant language
Super polite forms	Histrionic of choice
Weak quantifiers	Animism
Expletives
Empathic stress

 
 

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In order to increase grain yield, nitrogen use efficiency (NUE) and nitrogen apparent recovery fraction (NARF) in wheat (Triticum aestivum L.), this experiment was carried out with 5 or 6 treatments and 3 or 4 replications in 14 locations at 22 different sites in Iran during the 2004-05 growing season. The experiment was designed as a completely randomized block. The effect of N sources and timing on the grain yield, protein content, NUE and NARF of the current best adapted cultivars of different regions were evaluated. The treatments included T1= the control; T2= 150 kg ha-1 of N as urea in 3-split applica-tions; T3= 150 kg ha-1 of N as urea in 2-split applications; T4= 150 kg ha-1 N as SCU as the base fertilizer; T5= 1/3 N as SCU as the base fertilizer +2-split urea applications and T6=1/3 N as complete fertilizer as the base fertilizer +2-split urea applications. Protein content, NUE and NARF were calculated by measuring grain yield, N% and N-uptake. While the average grain yield and protein% for the control plots were 2,840 kg ha-1 and 10.03%; the yield and protein for T2, T3 and T4 were 4,160 kg ha-1 and 11.66%; 4,278 kg ha-1 and 11.78%; and 3,921 kg ha-1 and 11.60%, respectively. Grain yield and protein content for T5 were 4,330 kg kg-1 and 11.89%. Yield of 4,674 kg ha-1 and protein content of 12.01% were ob-tained by substituting complete fertilizer with 1/3 urea (T6). The grain yield for T6 was significantly different from T2 for various reasons, including higher levels of available P, K, S, Zn, lower N-leaching and appropriate N-timing. NUE for T2, T3, T4, T5, and T6 was measured to be 8.8, 9.6, 7.3, 9.9, and 12.2 kg kg-1, respectively, and NARF were calculated to be 23.2, 25.3, 19.4, 26.3 and 31.6%, respectively. While the superiority of complete and SCU fertilizers over pre-plant urea has been proven, especially in the light-textured soils, it is highly recommended that the experiment be further tested and evaluated, since this practice has been increased the grain yield up to 12%, NUE up to 39 kg kg-1 and NARF up to 36% in comparison with the best wheat growers’ N-fertilization practice.

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Here we report the presence of Cybocephalus nipponicus Endrödy-Younga, 1971 from Iran, which has been collected on mulberry in Gilan province, as well as on bitter orange and Japanese spindle in Mazandaran province, northern Iran. The specimens were collected while feeding on scale insects, Pseudaulacaspis pentagona (Targioni Tozzetti, 1886), Unaspis euonymi (Comstock, 1881) and Lepidosaphes gloveri (Packard, 1869) (Hemiptera: Diaspididae). Photos of habitus and genitalia with some taxonomic comments are presented.