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Showing 4 results for Patimar

Frahmand Akhondnejad, Hojat Jafaryan, Rahman Patimar, Hossein Adineh,
Volume 9, Issue 1 (Winter 2020)
Abstract

Aims: The objective of this research was to investigate the effects of three commercial prebiotics A-Max, Celmanax and Ultra (each of 0.5, 1 and 1.5 g/kg diets) on growth, feed performance and blood biochemical compounds of beluga juvenile.
Materials & Methods: 900 fish with average weight of 21.5± 0.89 gr feeding was performed in 9 treatments (which on with three replicate) for 60 days. Control treatment was without supplementation. Fish were fed to satiation triple daily of 5% body weight. At the end of this period, the feed and growth performance were measured.
Findings: There was a significantly higher final body weight in ultra 0.5 (90.00± 21.78 g) compared with control (37.50± 9.60 g). The highest and lowest of food conversion were in treatments control and ultra (0.5), respectively. The results showed that the highest Fat and protein efficiency ratio was obtained in Ultra 0.5 (2.19± 0.77 and 7.37± 2.60) and lowest in control. Generally, the best treatments were in groups: Celmanax (dose of 0.5), A-Max (dose of 1.5) and Ultra (0.5). In addition, after determining the proper dose, blood samples were collected fish in the above-mentioned treatments. Based on the results of blood biochemistry parameters, there were no significant difference AST, ALP and ALT activity, so that the highest amount was obtained in the control. There were no significant differences in protein and cortisol experiment groups.
Conclusion: The results showed that the use of prebiotics in juvenile sturgeon diet has positive effects on feed performance and blood biochemical parameters.
Naser Koosej, Hojatollah Jafariyan, Abdolvahed Rahmani, Abdolrahman Patimar, Hosna Gholipoor,
Volume 10, Issue 2 (Spatial Issue on Persian Gulf 2021)
Abstract

In this study, coastal sediments of Qeshm, Bandar Khamir and Bandar Laft regions in Hormozgan province were studied to determine the level of contamination of heavy metals lead, nickel, zinc, iron and copper by natural processes or human activities. In order to identify environmental pollutants caused by heavy metals, shovel sampling was performed from the sediments of these areas to measure the concentration of heavy metals and determine the enrichment index. The location of the samples was determined using a GPS device and sampling of surface sediments (tidal zone) was performed at 30 stations in the study areas. Atomic absorption of flame spectrometry was used to determine the concentration of heavy metals. The results showed that the mean concentrations of heavy elements lead, nickel, zinc, iron and copper in all sampling stations showed a significant difference (p<0.05). In terms of concentration of studied elements in Qeshm region (copper: 33.76 ± 1.88, zinc: 85.44 ± 2.75, lead: 31.79±  1.23, nickel: 34.17 ± 2.29 and Iron: 38000±691.21 μg/g) compared to Bandar Khamir (copper: 26.84 ± 2.30, zinc: 77.54 ± 2.12, lead: 24.71±  1.37, nickel:25.82± 1.30 and iron: 36810± 482.882 μg/g) and Bandar Laft (copper: 22.74± 2.42, zinc: 65.22±2.61, lead: 19.93± 1.32, nickel: 21.70±2.06 and iron: 35560±1014.56 μg/g) had higher contamination. The results also showed that the metal enrichment factor is low in all sediment samples and in terms of Müller geochemical index, the degree of soil contamination is in the category of non-contaminated soils.

Volume 13, Issue 1 (Winter 2025)
Abstract

Background: Due to high toxicity, durability in natural conditions, and bioaccumulation in the food chain, potentially toxic elements are considered serious pollutants.
Material and Method: toxic elements (Al, As, Cr, Cd, Co, Cu, Ni, Pb, Zn, V, and Mn) in sediment samples from some coastal rivers flowing into the southern Caspian Sea (Tajan, Babolroud, and Shirood) were assessed. Single (Cf , EF, Igeo, Hq, PLI, and QoC) and integrated contamination indices (m-PEC-q, m-PEL-q, MERMQ, NPI, and CSI) were used to assess the ecotoxicological risk of the metals.
Results: At all sites, the level of Cd was less than the detection limit (<5 mg.kg-1), indicating no significant source of pollution containing Cd. The mean concentration order of the metals in the rivers varied, suggesting that their contaminant sources significantly differed. The metal content of the Tajan River was substantially lower than that of the other rivers. EF values of Cu, Ni, and As showed partial enrichment, probably indicating their anthropogenic origin. According to the single indices of CF, Igeo, PLI, and Hq, the Babolrood and Shirood Rivers, sediment was significantly contaminated by As, Ni, and Zn. Based on NPI values, the Shirood River was extremely polluted by As. Integrated ecotoxicological risk indices of CSI, m-ERM-Q, and m-PEL-q suggest that metals pose medium to low levels of environmental toxicity in the Babolrood and Shirood Rivers.
Discussion and Conclusion: This research demonstrated the necessity of using management and pollution control strategies such as improving wastewater treatment, promoting sustainable agriculture, and regulating industrial discharges.


Volume 24, Issue 4 (Winter 2024)
Abstract

Aim and Introduction
Trade is one of the most important factors for the economic progress of countries, which has become feasible with the globalization of business. In addition, the significant increase in energy consumption after the industrial revolution, aimed at improving the quality of human life, has led to increasing environmental degradation worldwide. Although economic growth is one of the main goals of countries, developed economies are more concerned about its environmental consequences. Unfortunately, it seems that developing countries often overlook environmental protection in their pursuit of desired economic growth.
Green technology is a form of technology that aims to minimize the environmental damage caused by energy consumption by increasing energy efficiency. Examples of this technology include renewable energy sources, energy efficiency measures, waste management, environmental monitoring systems, and electric vehicles, all of which contribute to significantly improving the quality of environment. Green technology and its positive consequences serve as a turning point for mitigating environmental damage and, most importantly, preventing further harm. It has proven to be highly effective and requires the collective efforts of all countries to achieve their economic goals while preserving and expanding their trade relationships, ultimately bringing their technological levels closer together.
Methodology
This research aims to investigate the technology gap and green technology and its effects on international trade between developed countries (Japan, South Korea, France, Germany, the United States, China) and developing countries (Iran, Turkey, Azerbaijan, Tajikistan, Pakistan, Kazakhstan, Kyrgyzstan, Uzbekistan). The study utilizes the gravity model and STATA software, analyzing the coefficients obtained from this model to examine how green technology development can have a positive impact on both environment and business. The data used in this analysis spans during 2008 - 2019 and is sourced from UNCTAD and WORLD BANK.
Findings
Based on the estimated results of this study, it has been determined that in developing countries, Gross Domestic Product (GDP) of the first country had a significant and positive impact on their trade. Therefore, a 1% increase in their GDP leads to an 0.84% increase in their trade. On the other hand, the impact of GDP for the second country is positive but not significant.
Furthermore, in developed countries, a positive and significant effect of Gross Domestic Product (GDP) on international trade is observed. A 1% increase in GDP for this group of countries leads to a 13.1% increase in trade for the first country and a 9.4% increase for the second country. Therefore, it can be concluded that an increase in production capacity creates greater capabilities for both groups of countries to enhance exports and trade.
The geographical distance has a significant negative impact on trade in both groups of selected countries. Therefore, a 1% increase in geographical distance leads to a 0.3% decrease in trade for developed countries and a 0.5% decrease in trade for developing countries. As a result, countries tend to prefer trading with their neighboring and geographically closer countries due to economic advantages, especially in transportation sector.
Technology gap has significant negative implications for developed countries and significant positive implications for developing countries. This means that with a one percent increase in technology gap between these countries, the trade of developing countries increases by 0.45 percent and the trade of developed countries decreases by 0.19 percent. Technology gap is considered a trade barrier in developed countries, while it is seen as an advantage in developing countries.
The impact of green technology is positive and significant in both selected groups of countries. One percent increase in green technology transformation results in a 0.91 percent and 1.91 percent increase in trade for developed and developing countries, respectively. This indicates that the adoption of green technology not only does not hinder international trade but can also strengthen trade relations in the green pathway.
Discussion and Conclusion
Transformation of green technology has had a significant and positive impact on trade for both groups of selected countries. This indicates that green technology has found a suitable position in advancing international trade for these countries.
Considering that green technology has a significant impact on development issues and the importance of preserving a clean and sustainable environment for future generations, as well as in line with the findings of this research, governments and societies should invest more in greener and more complex sectors. They should enhance their technical skills and develop the necessary technological infrastructure for the growth of green industries. Additionally, the international community should expand the support for emerging green industries in developing economies by strengthening global trade regulations, particularly through increased efforts by developing countries to acquire this technology.
According to the results obtained, the impact of technology gap on international trade among developing countries is positive and significant. This means that as the technology distance increases, bilateral trade between these countries also i
ncreases. Therefore, the mentioned countries, due to their lower level of technology, have a strong inclination to import technology and engage in trade with each other.
Based on the findings of this research, which identifies the technology gap as a stimulating and influential factor in increasing trade among these groups of countries, it is suggested to prioritize the advancement of technology for all countries. It is recommended to maintain a certain level of technology gap in developing countries while simultaneously pursuing alternative policies to harness its positive impact on trade


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