---

In this paper, results of the study on heavy metals solubility behavior of Ni-Cd filter cakes in Iranian Zinc Mine Development Company (IZMDC) plants are investigated. The effects of pH, temperature, liquid/solid ratio and contact time on the release of heavy metals (Zn, Cd, Ni and Pb) into water media was examined. Also, “Extraction procedure tests” approved by EPA were applied to the residues. Moreover, statistical data analysis was performed and the most important parameters for dissolution of Zn, Cd, Ni and Pb were found to be the pH and L/S.. The concentration of Cd and Pb in the extracts obtained from filter cakes by applying EPA extraction procedures at pH 5 are over 1.0 and 5.0 mg/L, which are toxicity limits, respectively. The concentrations of other metals in the solution are above the limits given by various quality standards for surface water.

 

---

Problem statement: Sense of place means people's mental perception of the environment and their more or less conscious feelings of their environment, which puts a person in an internal relationship with the environment, so that the understanding and feeling of the person is linked to the semantic context of the environment. Will be integrated. This sense is the factor that turns a space into a place with special sensory and behavioral characteristics for special people. The environment is made up of both physical and social aspects. Humans create places around them, and a place independent of humans has no meaning.
Aim: To analyze human interaction with the environment in terms of the effects of perception and behavior on the sense of belonging to a place in Mehr housing complexes.
Methods: The present study is descriptive-analytical in nature and the statistical population of the study is the residents of Mehr Mokrian Housing Complex in Mahabad. For data analysis, structural equations were used by second-order factor analysis with Amos software.
Results: The results showed that human needs have the greatest effect on creating a sense of place with 0.946 with the effect of perception and behavior in human interaction with the environment and the least effect is related to the interpretive dimension with a collective effect of 0.531 Be.
Conclusion: All the dimensions studied in the present study have an effect on creating a sense of place in human interaction with their environment.
 

---

Samples of leaf, twig and fruit from ‘Mexican’ lime (Citrus aurantifolia) and grapefruit (Citrus paradisi) with symptoms of bacterial canker were collected from different provinces throughout Iran during spring and summers of 2010 and 2011. Yellow, gram-negative colonies were isolated from infected tissue samples. Results of pathogenicity assays indicated that some isolates incited tissue hyperplasia, hypertrophy and raised callus-like lesions typical of canker in hosts while other isolates stimulated flat necrotic and water-soaked lesions on leaves. Candidate samples of each group were identified according to morphological and physiological characteristics. Detections were also made using specific primers and partial sequencing of 16SrDNA for Pantoea group and gyrB for Xanthomonas group. Results showed that one group was characterized as the typical Xanthomonas citri subsp. citri strain while the other group containing most of the isolates was identified as Pantoea agglomerans. Samplings done frequently in different seasons revealed the presence of high populations of P. agglomerans with bacterial canker, especially in warmer and drier regions. These bacteria were able to incite canker-like symptoms on grapefruit seedlings and could be reisolated after two months.

---

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.

---

Urban art, as a fluid event in the city, seeks to reduce vitality due to not paying attention to creating a vibrant urban space and creating changes in social and cultural behaviors. In the urban place, different types of arts can be seen, among which music has received less attention so that the physical-spatial scene of the city does not have a suitable place for performing music. Nowadays, in the urban space, a different kind of street musicology has been formed, playing and singing mostly as a solo or two-person performance.
This study aims to investigate creating a sense of belonging and vitality to the urban space and music audiences and the effect of music on the audience in the urban space.
The research method in this article is based on the preparing a questionnaire and selecting three different statistical populations, considering the effect of music on different sections of society. The current study is a case study of Khayyam Street in Urmia.
The results of the research indicate that, from the point of view of businessmen, passers-by, and music teachers, street music as a street art has a significant impact on urban space, music cultural as well as urban vitality and audience attraction, giving the audience a sense of belonging to the urban space.
 

---

---

Aims: Marine macroalgae are diverse organisms with adaptation for live in stressful environments. The aim of this study was to investigate the biological activities of organic extract; n-Hexane (nH), ethylacetate (E) and methanol (M) of three green alga from family Ulvaceae, Ulva clathrata, Ulva linza and Ulva intestinalis, collected from the coast of Bandar Abbas.
Materials & Methodes: In this experimental study, for identification the superior species, the tested activities included antioxidant assay at gradient concentrations by ferric reducing power assay, total antioxidant capacity, total phenolic content, and brine shrimp cytotoxicity activity of these extracts on model organism, Artemia salina. Data analysis was performed by one-way analysis of variance and Duncan's multiple tests at 5% probability level using SPSS 21 software and drawing charts using Excel 2013 software.
Finding: The more effective algal extracts by maximum antioxidant capacity, were recorded for M extracts of U.intestinalis, E and M extracts of U.linza and U.clathrata. The algal extract exhibited a higher antioxidant activity in comparing to ascorbic acid (as a standard) with significant differences between the extract in different concentrations (p≤0.05). The result showed the highest content of total phenol were recorded for the M extracts of U.linza and U.clathrata which confirmed the findings of other researchers that the increase in free radical scavenging activity of natural extracts is associated with the content of phenolic compounds. The highest brine shrimp cytotoxicity activity was recorded for the nH extracts of U. linza (LC₅₀= 300.78 mg/ml). According to the results, in general, U.linza can be introduced as a priority species for biological properties and in further studies.
Conclusion: Three green alga from family Ulvaceae, Ulva clathrata, Ulva linza and Ulva intestinalis, have antioxidant and cytotoxic activity. U.linza due to the high amount of phenol and high antioxidant power can be introduced as a priority species for biological properties.

---

In recent years, the environmental Kuznets curve (EKC) hypothesis has become a major subject among issues dealing with environmental economics. This curve tries to show an inverse U-shaped relation between economic development indicators and pollution. In this study, the curve has regionally been considered in the city of Tehran with respect to its municipal solid wastes. The results confirm that over the period 1996 to 2006 there has been no sign of the EKC in Tehran. However, the source separation of dry wastes policy was effective in decreasing the slope of the so called EKC as it is expected.

---

In this article sub-grid modeling of Smagorinsky and Localized Smagorinsky Models are investigated. In modeling sub-grid scales, it is necessary to determine the Smagorinsky coefficient which is an experimental constant. Dynamic Models are developed to estimate this value more efficiently. In this research, the test filter is Gaussian, numerical method is based on the finite volume scheme, and a SIMPLE algorithm is used to evaluate the pressure. To perform computations on a personal computer, value of Reynolds number had chosen enough low to make a two dimensional modeling and comparison with respective experimental results possible. Comparison of numerical results shows high accuracy of the localized dynamic models. More numerical investigations reveal that although localized dynamic models need more computing time, but the higher resolution of the method makes it possible to use a coarser grid and hence compensate the extra CPU time.

---

 Biofloc technology is considered as a culture system for fish production reduced environmental impacts. In the present study investigated the impact of zeolite nanoparticle on water quality, growth performance, digestive enzymes and immune response of common carp (Cyprinus carpio) reared under biofloc conditions. Fish fingerlings (initial weight of 7.99 ± 0.36 g) were divided into four treatments and fed four levels of zeolite nanoparticles in the following 0 (control), 50, 100 and 200  mg kg⁻¹ diet in biofloc system (NZ1, NZ2 and NZ3) for 60 days. Carbon to nitrogen ratio (15:1) was provided using sucrose. Water quality parameters such as nitrogen compounds were measured during the test period. At the end of the experiment, the highest growth indices and the lowest feed conversion ratio were obtained in 50 mg kg⁻¹ diet (NZ1). Intestinal protease activities in NZ1 and NZ2 treatments were significantly higher than in the other treatments, and the highest lipase and amylase activity was related to the NZ1 treatment. The 50 and 100 Zeolite diets in biofloc conditions significantly enhanced fish immune system activity. The present study suggests that dietary supplementation with 50 and 100 mg Zeolite nanoparticles in biofloc system significantly increases growth performance, digestive enzyme, and immunological response in common carp in fish culture tanks.

---

Raisin is a principal traditional export product of Iran and has occupied a special position in the foreign trade of the country. During storage period, the product turns sticky and hard due to exudates syrup and moisture loss. To overcome this problem the application of edible coating suggests being of proper assistance. Edible coating may enhance the boundary layer resistance resulting enhanced shelf life of product. In this research the method of Accelerated Shelf Life Testing (ASLT) used for evaluation of storage and sensory properties (texture, colorو taste and overall acceptability) of raisin .Raisin was treated with coating materials based on lipid (glyceryl monoestearate and carnauba wax) with 150 ppm essential oil of thyme (thymus vulgaris) and stored at 20, 35 and 50^oC for 12 weeks. During this period of storage sensory properties were evaluated and estimate the modeling shelf life of raisin. Results showed that coating, affect on texture and color significantly and caused increasing shelf life of raisin. Temperature and storage time also showed significant effects on total sensory attributes. Maximum shelf life (394 days) determined at 20 ^oC for carnauba wax coating with essential oil of thyme based on overall acceptability   and linear regression and second order function had best fit with R²≥0.94 for all of treatments.  

---

Time-temperature indicators (TTIs) are used to check the safety of the fresh foods with reduced oxygen packaging (ROP). Already, the behavior of TTIs with zero-order kinetic was described based on Skinner-Larkin model. For TTI expiration before toxin formation, the Arrhenius curve of TTI (in the coordinates system of lnk versus 1/T) should be located above the zero-order Skinner-Larkin-Arrhenius curve (SLA0) for all possible temperatures. However, SLA0 may incorrectly describe TTIs behaviors since they often provide first-order kinetic (similar to most natural processes). Developing a new model to describe the behavior of all types of TTIs (with zero or first-order kinetic) for fresh seafoods with ROP is the main goal of this research. In this paper, the first-order Skinner-Larkin-Arrhenius (SLA1) model is proposed as a pencil of curves to extend SLA0 for the TTIs with first-order kinetic. Furthermore, because of including the SLA0 curve, the SLA1 model can be equivalently used for both zero-order and first-order TTIs. Simulation results demonstrated that SLA0 could not correctly predict the behavior of first-order TTIs. By using the proposed model, we can successfully predict the behavior of both zero-order and first-order TTIs for fresh seafoods with ROP. 

---

In a marine environment, the biofilm formed on the submerged surfaces leads to fouling of larger organisms. This leads to many environmental and economic problems for the marine industries. Due to the harmful effects of chemical antifouling, the development of environmentally friendly anti-biofilm strategies can be an important step to control fouling.
Therefore, the present study was performed with the aim of isolation of biofilm-forming bacteria from Persian Gulf waters and investigating the antimicrobial effect of thymol against selected bacteria.82 bacterial were isolated and their ability to form biofilm was measured. Among these, 5 isolates were selected and identified using 16S rRNA sequences. The results showed that the 5 selected isolates belonged to the Proteobacteria (genus Vibrio, Kangiella and Psudoaltromonas). In the study of the antibacterial effect of thymol, K. spongicola (PH1) showed the highest sensitivity in disk diffusion method (with a growth inhibition zone diameter of 18 ± 0.57 mm). The minimum inhibitory concentration and minimum bactericidal concentration (at 31.5 and 62.5 μg /ml, respectively) were obtained against the same bacterium. The inhibitory thymol on biofilm formation and performed biofilm by Psudoaltromonas sp. (PH18) showed that thymol at concentrations sub-MIC is able to inhibit biofilm formation. The effect of thymol on the performed biofilm at concentrations higher than MIC is noticeable. Based on the results, due to the anti-biofilm activity of thymol against marine bacteria, its use as a natural compound in antifouling coatings can be suggested.

---

In order to assess drought tolerance of mycorrhizal petunia plants (Petunia hybrida cv. Mix), a greenhouse experiment was carried out with two different mycorrhizae species (Glomus mosseae and Glomus intraradices) applied singly or in combination at two phosphorous (P) levels (0 and 100 mg kg-1 dry soil) and three irrigation regimes (100% field capacity (FC) as control, 75% FC producing moderate water stress and 50% FC producing severe water stress). Both mycorrhizal endophytes established well on roots of the petunia plants with higher colonization values at lower P concentration and lower colonization rate at increasing water stress. Mycorrhizal colonization generally enhanced plant vegetative and reproductive growth, both under full and reduced field capacities and with and without P fertilization. The content of soluble sugar in AMF-inoculated leaves was higher than that in non-AMF-inoculated plant leaves in response to drought treatments but proline level did not show any significant increase in mycorrhizal treatments at the same conditions. This study confirms that mycorrhizal colonization can mitigate the adverse effects of water stress on treated plants restoring most of the key growth parameters to levels similar or close to those in unstressed plants.

---

This study was carried out to determine the effect of fermentation, hydrothermal treatment, soda (Na2CO3), and table salt (NaCl) addition on the extent of phytase activity and phytate degradation in three Iranian wheat cultivars, namely, Mahdavi, Ghods, and Roshan. The samples were milled to three different extraction rates, i.e. whole, 85%, and 75% flours and three kinds of leavening procedure (fermented, soda, and control), and four NaCl percentages (0.0, 0.5, 1.0, 1.5%) were used for preparing dough in three replications. To evaluate the effect of heat treatment on phytic acid breakdown, baking was also done. The results indicated that among the wheat varieties, Mahdavi had the highest level of phytase activity and phytic acid content followed by Ghods and Roshan; in which‚ most of the phytate was concentrated in bran fractions. Fermentation (1% yeast at 37ºC for 3 hours), hydrothermal treatment (pH 4.8 at 55ºC for 12 hours) and salt addition (0 to 1.5%) to the dough samples resulted in an increased phytase activity, whereas soda addition (1%) decreased the enzyme activity. Heat treatment reduced phytic acid content significantly.

---

In rocket systems, the re-entry speed to atmosphere is very high which leads to compression of air molecules and appearance of strong bow shock waves in the leading edge; consequently, this yields aerodynamic heating. Using ablating-dispensing materials on the leading edge surfaces, it is important to accurately determine heat flux on these moving boundaries. Measuring heat flux directly is very difficult or impossible in some situations. In the present study, the online Kalman filtering is used to determine heat flux accurately. Since the heat flux is estimated in online (non-iterative) fashion, the optimum location of temperature sensors can be effectively determined. In addition, the results of this study can be used to design heat flux sensors. In this paper, the optimum locations of three temperature sensors are calculated on the basis that the disturbances occur due to burning of sensors are reduced. More robust solutions are obtained for heat flux on the ablating surfaces.

---

The volatility of essential oils and their instability against environmental factors limit their use. However, encapsulating these compounds in polymeric nanoparticles can significantly increase their half-life and make their use possible for longer periods. Chitosan, a biodegradable polymer with controlled release and low toxicity, is one of the polymers utilized in the encapsulation of essential oils. As a result, the present study was carried out with the aim of nanoencapsulation of carvacrol and thymol in chitosan using ionic gelation method and the concentration of chitosan (0.1-0.3%), TPP concentration (0.2-0.1%) and concentration of essential oil (0.1-0.2%) as three variables. The mean particle size of chitosan nanoparticles was optimized using response surface methodology and central composite design. The size and polydispersity index (PDI) were determined by DLS, essential oil loading confirmation was evaluated by FTIR, and the spectrophotometric method was used to measure the encapsulation efficiency. Then, the results of the optimization of nanoparticle synthesis were investigated. The optimum conditions for the synthesis of chitosan-thymol nanoparticles and achieving a size of 101 nm and encapsulation efficiency of 72%, a concentration of 0.11% chitosan, 0.19% TPP and 0.14% thymol were determined. In the case of chitosan-carvacrol nanoparticles, a concentration of 0.13% chitosan, 0.19% TPP and 0.15% carvacrol resulted in the formation of nanoparticles with a size of 95 nm and an encapsulation efficiency of 65%. In general, the results demonstrated the ability of the response surface methodology to predict the particle size and PDI of chitosan nano-formulations containing carvacrol and thymol.

---

In this paper, the immersed boundary-lattice Boltzmann method has been employed to simulate non-Newtonian flow around curve boundaries. The pressure base lattice Boltzmann equations have been used to solve the Eulerian domain to estimate proper pressure gradient in the Poiseuille flow. In addition Immersed boundary method (IBM) utilizes a discrete set of force density is also used to represent the effect of boundary on flow domain. In addition to simulate the real physical dominate problem and study the right effects of non-Newtonian fluid properties, scaling parameters have been introduced to notice the relationship between physical and lattice variables. At First, the capability of present method is examined for simulating the power-law fluid flow around a confined circular cylinder and the results show good agreement with previous study. In the following, the power-law fluid flow around elliptical cylinder in a channel is investigated for three aspect ratios eta=1,1.5,2 and for 5

---

In the present paper, mixed convection of TiO2-water nanofluid in a laminar flow within a vertical rectangular duct is investigated numerically. A single phase and a two phase method is applied to simulate nanoparticles dispersion in the base fluid. An Euler-Lagrange approach is employed to track particles individually. In this approach, the base fluid is assumed to be a continuous phase while the particles are dispersed through it. The presence of particles in the base fluid is modeled as a source term in the momentum and energy equations. Governing equations is discretized using Control Volume based Finite Element Method (CVFEM). Effects of nanoparticles concentration, particles size, aspect ratio of cross section, asymmetrical boundary condition and buoyancy on the hydrodynamics and thermal parameters are presented and discussed. It is observed that increasing nanoparticles concentration enhances heat transfer rate and this enhancement is more considerable in higher aspect ratios. Also, at smaller values of Richardson number (Ri) where the effect of forced convection is more than natural convection, dispersion of nanoparticles in the base fluid improves heat transfer rate more considerably. Whilst an improvement in convective heat transfer is shown to be more than 6.5% at Ri=0.05, it does not exceed 4% at Ri=0.5.

---

The ratio of lift to drag coefficient in wind turbine blades is within the most important parameters affecting the power coefficient of wind turbines. Due to the performance of Magnus wind turbines in low speed air flow; such turbines are attractive for research centers. In the present work, a new geometry for the blades of Magnus wind turbines is defined. The defined geometry is based on the geometry of a Treadmill with a difference that the diameter of its leading circle is greater than that of its trailing one. In the present work, the body is supposed to a low speed air flow while a tangential velocity is applied to the airfoil surfaces and then, its effect on the lift and drag coefficient is studied by numerical method. The effect of generated tangential velocity on the surfaces is investigated for different air flow speed and attack angles and then, its results are compared with that for stationary surfaces. The results show that generating tangential velocity along the surfaces caucuses the lift and drag coefficients and, their ratio to be varied, greatly. By the tangential movement of the surfaces, the maximum ratio of lift to drag coefficient occurs in zero attack angle which is equal to 109. Moreover, maximum magnitude of lift to drag coefficient for attack angles 5, 10, and 15 degrees are 81, 64, and 57; respectively.