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Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3 (SERIAL NUMBER 5)
  • Pages: 

    1-8
Measures: 
  • Citations: 

    0
  • Views: 

    1542
  • Downloads: 

    0
Abstract: 

This study was conducted in the rangelands of Khuzestan province in order to evaluate the effect of rangeland reform and restore methods with heavy and salty texture. Four reform operations, including Rainfall Reservation and Seeding, Bush Planting, Enclosure, Grazing Systems Observations and Fodder Cultivation were selected. Some treatments, as controls, alongside every reform operation were also studied. In each treatment, four fixed transects with the length of 100 (m) were located as soil samples; along each transect there were six profiles and drilling. And 12 soil samples were taken from the depths of 0-30 (cm) and 30-60 (cm). The soil samples were transferred to Soil Science Lab to measure and analyze the factors of the study in each depth including: the organic matter, absorbable N, P, K, cations of potassium, calcium and magnesium, exchangeable-sodium percentage, clay, silt and sand, soil pH and underground water table. Results showed that parameters of nitrogen, carbon, potassium have had significant effect on the control treatments. Also, it was shown that there was a significant difference among the parameters of Ec, Na, Ca, Mg, Sp and Esp in the treatments. Finally, the results of this study showed that taking the environmental considerations and the costs into account the project management of pasture Grazing and Exclosure and then the reform project of Rainfall Reservation and Seeding have positive effects on soil. Other methods are not recommended in the study area; Dry fodder cultivation is not cost-effective, and Bush planting is not a compatible species with the region.

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Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3 (SERIAL NUMBER 5)
  • Pages: 

    9-22
Measures: 
  • Citations: 

    0
  • Views: 

    1286
  • Downloads: 

    0
Abstract: 

Nowadays, the Remote Sensing techniques are known as effective data sources which are used for land cover and land use change studies. These techniques have been used to monitor land use changes which have an important role in monitoring the land cover changes and the determination of land cover quality parameters. In this study, land cover images of TM and ETM+ from Landsat satellite of 1989 and 2000 and also LISSIII image of IRS satellite of 2007 were used to define and evaluate the land use changes in Talesh County in Northern Iran. Radiometric and geometric corrections were conducted using orthorectification method and in image processing phase the primary production of new bandages was conducted. The most adequate band combination in each image was defined using OIF method and the supervised classification was conducted to defend land cover classification employing more than 50 ground trusted training samples. The results of computation for land use changes clearly showed that the area of forest land decreased and the built-up and urban areas underwent a growing trend. At the final phase, by employing Digital Elevation Model (DEM) data land use changes in different physiographic state were surveyed. The results illustrated that most of the land use changes occurred in the areas with lower slope and elevation especially in eastward directions.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

FATTOLLAHI M.

Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3 (SERIAL NUMBER 5)
  • Pages: 

    23-32
Measures: 
  • Citations: 

    0
  • Views: 

    9805
  • Downloads: 

    0
Abstract: 

Formalin is used as an anti-septic and therapeutic solution on the fish fertilized eggs in the hatcheries of rainbow trout farms. In this research, the risk of current formalin use on the health of exposed workers in the hatcheries of rainbow trout farms of Chaharmahal va Bakhtiari prov. (the south -west of Iran) was evaluated. This report has focused on three operation authorizations basis of 11 hatcheries; consisting of the workers’ general knowledge of the formalin health hazards, the necessary considerations during accidental formalin leak or considerations of the occupational individual health preservations during formalin use, and so the provided and established equipment in the hatcheries to protect the workers and reduce accidental releases harms to the public and the environment. The study reveals that all the workers were improperly utilizing formalin not only with the unnecessary dosage but also with the unsuitable (no laboratory) equipments. There is only one case of applying suitable gloves (not latex gloves) and 33 % simple mask ventilation among the users as the simplest hazard protection approaches; however 100%, 70.8% and 91.7% of subjects have declared irritation of the eye and throat, coughing and the fingers’ numbness respectively. This awareness of carcinogenetic, tissues fixative attributes of formalin, and its flammable-combustive characteristics were 16.7%, 62% and 33%, respectively. None of the 11 farms have provided equipment for 5 predicated accidents as first aids kits and rescue for fire (except for two fire extinguishers). There is evidence of high risk of the formalin use about ecological, public and human health because of unsuitable management system of safety basis and environmental protection requirements in the rainbow trout farms.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

SAYADI F. | MOGHADDASI R.

Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3 (SERIAL NUMBER 5)
  • Pages: 

    33-43
Measures: 
  • Citations: 

    1
  • Views: 

    1100
  • Downloads: 

    0
Abstract: 

Valuation of environmental capital is one of the elements of ecological sustainable development. This concept of source valuation leads us to ask questions about the extent of environmental valuation which occurs with economic considerations. In this research, the recreational value of the district was determined by means of Contingent valuation method in order to study the satisfaction value of the recreational district" Vashi Canyon and Savashi Water Fall ". The effective elements of the extent of this satisfaction were determined by Logit method. The willingness to pay for satisfaction with recreational use of Vashi Canyon and Savashi Water Fall was measured as 9082/7 Rial/person per visit. The result showed that variables like bid, household monthly salary, education, satisfaction rate can have a meaningful effect on willingness to pay for using the environmental satisfaction. It seems also that we can exploit from and maximize ecotourism preferences to the maximum rate due to the support from private sector in order to establish the infrastructure for information services, and to introduce the worth-seeing places in the district.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3 (SERIAL NUMBER 5)
  • Pages: 

    45-56
Measures: 
  • Citations: 

    0
  • Views: 

    1780
  • Downloads: 

    0
Abstract: 

The extent of lands especially the waste dump areas that are affected by mining activities will is on the increase. Thus, the need for performing mine reclamation increases every day. The main objectives of this research are; Plant type Selection and planting to protect the region environment and the reclamation of the Sarcheshmeh Copper Mine. This case study was conducted in the Sarcheshmeh Copper Mine. Plant types were selected based on reclamation plan’s primary criteria that are: Kind of post mining land use, Geology and Climate, Nature of soil. Then, comparison matrixes were obtained based on criteria and alternatives questionnaires that were completed by experts and plant types were prioritized by Fuzzy AHP method and Fuzzy TOPSIS method based on secondary criteria that are: Perspective of the region, Resistance against disease and insects, Strength and method of growth, Availability to plant type, Economic efficiency, Protection of soil and storing water, Prevention from pollution. Suitable plant types in the mining perimeter and Sarcheshmeh Copper Mine tailing dams were prioritized as follows: Amygdalus scoparia [wild almond], Pistachio [Pistachio Wild], Tamarix, Ephedra, Astragalus, Salsola.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3 (SERIAL NUMBER 5)
  • Pages: 

    57-70
Measures: 
  • Citations: 

    0
  • Views: 

    925
  • Downloads: 

    0
Abstract: 

The aim of the present study is surveying on the population structure of bigeye kilka (Clupeonella grimmi Kessler, 1877) in the southern Caspian Sea in Mazandaran Province coasts. In this study which was conducted during 2010, 1043 samples were fortnightly provided from Babolsar fishing harbor in Mazandaran province. Length, weight, sexuality and age of samples were determined. Age was determined using sagitta otoliths. The results were compared with previous years. The growth parameters were calculated as (L∞=149.7mm, k=0.32 yr-1, t0=-1.20 yr) for females and (L∞=136.5mm, k=0.65yr-1, t0=-0.24yr) for males. Length-weight relationship in females was W=0.000006 FL3.043 (R2=0.813) and in males was W=0.0000006 FL3.079 (R2=0.834) which growth pattern in both sexes was positive allometric. Bigeye kilka population was constituted of 6 age groups, including 2-7 years. Mean age of females and males were 4.09±1.25 and 3.61±1.45 years, respectively. In females, four-year- old fish were dominant with 33.34 percent relative abundance. In males, three-year- old fish were dominant with 47.45 percent relative abundance. Male-female sex ratio was 0.656: 1 and females were dominant. Results showed that in recent years, bigeye kilka population has become older and their length and weight have increased. According to the biological parameters and comparing with the previous years, bigeye kilka has not been very affected by the Caspian Sea pelagic changes, due to inhabiting in deep regions.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

TALAEIPOUR M. | MAYELI N.

Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3 (SERIAL NUMBER 5)
  • Pages: 

    71-83
Measures: 
  • Citations: 

    0
  • Views: 

    636
  • Downloads: 

    0
Abstract: 

In this study, effects of enzymatic deinking on mechanical properties of deinked pulp old coated magazine were investigated. The protocol for the enzymatic treatment of old coated magazine on a laboratory scale using cellulase and combination of callulase: lipase was developed as an effective method for paper recycling. The old coated magazine was prepared and pulped with pulp consistency of 4% and the pulping time of 2, 5 min, temperatures of 20 C and 50 C, at neutral PH. Then the pulps were deinked by Denver flotation cell at the laboratory of Azad University, Science and Research branch of Tehran. The results showed that enzymatic treatment increased the mechanical strengths of the treated pulp compared to the control pulp except for its tear strength. The results of freeness showed that enzymatic treatment decreased the freeness of treated pulps. However, increasing the temperature of pulp decreased the freeness.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

SABRI E. | ARZANI H. | JAVADI S.A. | MOTAMEDI (TORKAN) J.

Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3 (SERIAL NUMBER 5)
  • Pages: 

    85-94
Measures: 
  • Citations: 

    0
  • Views: 

    1708
  • Downloads: 

    0
Abstract: 

There are about 27 sheep breeds in Iran. It is necessary to specify size, weight, animal unit equivalent (AUE) and daily requirement of these breeds in each region for determining rangelands grazing capacity. In this study, animal unit equivalent of Haraki Sheep breed and its conversion coefficient to country animal unit were studied. For this purpose, two herds were selected within this breed herds grazing in rangelands. Within each herd 15 heads of three-year-old ewes, 15 heads of four-year-old ewes, 5 heads of three-year-old rams and 5 heads of four-year-old rams were selected and their weights were measured in summer and winter rangelands. In addition, this number, at the summer rangeland, 10 heads of three-month-old lambs and 10 heads six-month-old lambs were weighed. The average weight of adult ewes (three and four years old) was considered as the weight of Haraki sheep breed. According to results, the weight of Haraki sheep breed is 56.53±1.73kg and in comparison with the weight of country animal unit, it is of heavy weight breeds. Animal unit equivalent of various categories of this breed (ewe, rams, 3 months old and 6 months old lambs) compared to the animal unit of the country, are 1.10, 1.31, 0.51 and 0.65 respectively. The results show that breed diversity cause variation of sheep breeds weight. On this basis, weights of various breeds are different and they are categorized in various classes and it is not permitted to assign daily requirement of various breeds according to a basic unique weight in calculation of grazing capacity.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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