علوم زیستی دریا
maryam razmi; hosein Mohammad Asgari; ali Dadolahi-Sohrab; seyyed mohammad jafar Nazemossadat; seyyed hosein kh
Abstract
Coastal environments are considered the most sensitive system environments. In terms of environmental Coastal areas because of the sensitive and productive ecosystems have high importance and value. Having knowledge of the coastline’s behavior can help of the coastal better management. The aim ...
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Coastal environments are considered the most sensitive system environments. In terms of environmental Coastal areas because of the sensitive and productive ecosystems have high importance and value. Having knowledge of the coastline’s behavior can help of the coastal better management. The aim of this study is to assessing the application of the OIF utility index factor in the assessment of coastline changes in Dayyer city, Using Landsat satellite images sensor TM and OLI 1991 and 2014 and the software are 2013®MATLAB and ArcGis 9.3. For the separation of land and water, OIF index value for all different band combinations in the application MATLAB® 2013 was calculated and then high-pass Sobel filter with 3 × 3 masks was applied to the images. Then digitization process during different periods in application environments ArcGis 9.3 was done manually and with high precision. The results of the survey the coastline from 1991 to 2014 show moving the coastline to the sea side (sedimentation) and landward (erosion), Which totals 33/784 square kilometers sedimentation and 9/132 square kilometers erosion shows from 1991 to 2014, in Dayyer city occurred because of the construction of piers, installations manmade and natural factors.
علوم زیستی دریا
Nasrin Abdolkhanian; Heeva Elmizadeh; Ali Dadolahi Sohrab; Ahmad Savari; Mohammad FayazMohammadi
Abstract
Water resources under threat of pollution such as industrial waste, fertilizers, pesticides and urban sewage that negative effects on the environment and ecosystems. Arvand Rood is one of the most important navigable rivers in Iran, and it’s the most traffic place for floating which don’t ...
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Water resources under threat of pollution such as industrial waste, fertilizers, pesticides and urban sewage that negative effects on the environment and ecosystems. Arvand Rood is one of the most important navigable rivers in Iran, and it’s the most traffic place for floating which don’t have any system for delivery waste materials and discharging these waste materials in water making oil pollution. In this research, modeling pollution in the Arvand River using three-dimensional and hydrodynamic model to simulate how the pollution is studied, the Navier-Stokes equations in three dimensions and equations are solved transfer salinity and water temperature separation method. Boundary conditions applied, including changes in temperature, salinity and flow rate, temperature and salinity changes and apply for open border river and tidal components O1، S2، M2 and K1 open sea in the model used for the border. The results of modeling pollution in Arvand After running the model revealed that the pollution is pollution in the Arvand River according to location and time of release, In other words, in the Arvand River pollution from one point to another and from season to season is different, in fact, pollution is reciprocating mode. Diffusion of oil pollution in Arvand rood is depending to current. And in low tide because of same side of river current with low tide pollution reached to the Persion Gulf with high speed. The results shows, represent the effect of tie on diffusion pollution.
علوم غیرزیستی دریا
Arash Larki; Seyyed Jafar Saghanezhad
Abstract
In this study, the removal of congo red and erythrosine as anionic dyes were investigated by using the cucurbit[6]uril nonporous as a new adsorbent. In the proposed mythology, the Batch removal method was applied. In order to obtain maximum removal efficiency, the effects of acidity of solution, adsorbent ...
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In this study, the removal of congo red and erythrosine as anionic dyes were investigated by using the cucurbit[6]uril nonporous as a new adsorbent. In the proposed mythology, the Batch removal method was applied. In order to obtain maximum removal efficiency, the effects of acidity of solution, adsorbent dusage and contacting time were investigated and optimized. Adsorption experimental data were analyzed using Langmuir and Freundlich isotherm models and the best-fitted data was obtained with the Langmuir model. The maximum adsorption capacity was 128.2 mg g-1 and 95.9 mg g-1 for congo red and erythrosine, respectively. This method was successfully applied for the removal of congo red and erthrosine dyes from Karron and Bahmanshir water river and Persian Gulf water samples.
علوم انسانی دریا
Parisa Amiri Farsani; Davar Rezaeimanesh
Abstract
AbstractBackground and aims: One of the main reasons for heart attacks are imbalance of homeostasis system which can cause thrombosis and lead to heart attacks. This study explored the effects of aquatic exercise on the fibrinogen, CRP, cystatine C and lipid profile of nonathletic students.Methods: A ...
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AbstractBackground and aims: One of the main reasons for heart attacks are imbalance of homeostasis system which can cause thrombosis and lead to heart attacks. This study explored the effects of aquatic exercise on the fibrinogen, CRP, cystatine C and lipid profile of nonathletic students.Methods: A total of 30 female non-athletes with aged 18-27 years were selected randomly divided the two groups of aerobic and control. The aerobic group took part in three weekly sessions of aerobic exercises during a twelve week period. Fibrinogen, CRP, cystatine C, triglyceride, cholesterol, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) factors were studied through obtained blood samples. Result: Findings showed that aquatic exercises led to a significant decline in the subjects’ fibrinogen (P=.037), cystatine C (P=.013), triglyceride (P=.005) and cholesterol (P=.003) levels. But did not cause significant differences in other variables.Conclusion: This study concluded that routine aerobic training can decrease the threat of cardiovascular disease through the decrease of some inflammatory indices such as fibrinogen and cystatine C.Key words: fibrinogen, CRP, cystatine C, low-density lipoprotein , high-density lipoprotein.
علوم زیستی دریا
Hassan Morovvati; Mahmood Khaksary Mahabady; Mehrzad Mesbah; Mehdi Hadi Jafari
Abstract
Barbus grypus is native fishes in Khuzestan province which its species with a wide distribution in the rivers that considered fisheries research in province. The fish have no stomach, space of intestine is narrow to store of food, for this reason anterior intestine dilated bowel and called intestinal ...
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Barbus grypus is native fishes in Khuzestan province which its species with a wide distribution in the rivers that considered fisheries research in province. The fish have no stomach, space of intestine is narrow to store of food, for this reason anterior intestine dilated bowel and called intestinal bulb. Study of histological structure of intestinal bulb in fishes can help to nutrition and food needs so that we can extend of this species. In this study, 10 adults Barbus grypus of both sexes with average weigh 354.25 ± 60.52 g and average length 36.25 ±4.16 cm was chosen, and after easy drawing, samples were removed from intestinal bulb. The 0.5cm were fixed by Bouin´s fixative soluble and 5-6µ thickness sections were made by paraffin embedding method and were stained by H&E and PAS. The histomorphometrical studies were done using digital Dino-Lite lens and Dino-capture1 software. The results showed that the number of goblet cells in the intestine increased toward the end of the intestinal bulb. The intestinal epithelium height in the anterior part of the intestinal bulb was higher than other parts. Muscular thickness was different in different parts of the intestinal bulb, the middle part of intestinal bulb has thickest muscle between other parts of intestinal bulb. The results of this research indicate that there is some analog histological structure of the intestinal bulb in Barbus grypus to compare of other same family: from wall diameter and intestinal epithelium height and diameter of mucosa.
علوم زیستی دریا
narges badri; Narges Amrollahi biuki; Mohammad Sharif Ranjbar
Abstract
The LC50-96h test paradigm is used to measure the susceptibility and survival potential of organisms exposed to particular toxic substances, such as heavy metals. In this study, the statically acute toxicity of Pb on hermit crab D. avarus was determined according to standard methods O.E.C.D in 96h. 84 ...
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The LC50-96h test paradigm is used to measure the susceptibility and survival potential of organisms exposed to particular toxic substances, such as heavy metals. In this study, the statically acute toxicity of Pb on hermit crab D. avarus was determined according to standard methods O.E.C.D in 96h. 84 individual hermit crab with 0.19±.0.01 g weight average were used in five different treatments (75, 100, 150, 175, 200 microgram per liter of lead) with three replicates and a control treatment (15 hermit crab per in each treatment). The effective physical and chemical parameters of water including pH, total hardness, dissolved oxygen and temperature were controlled throughout the experiment. Finelly, the rate of the acute toxicity (LC50 96h) was determined to be 184.045 µg/l by using the statistic method Probity analysis. Furthermore, the rates of LC10, LC50, LC90 (24, 48, 72 and 96h) were calculated. Results indicate that when the experiment time is extended, lower concentration of Pb is leading to mortality in hermit crab D. avarus. The percentage of mortality increased with increasing duration of exposure of crab to different amounts of lead concentration. The behavioral changes observed in hermit crabs D. avarus in the experiment period included an imbalance in walking, reduced activity and movement, slow motion, no irritability and also color change of the abdomen.
علوم زیستی دریا
Mohsen Mohammadi Galangash; Abdolali Movahedinia; Zahra Bozorgpanah Kharat
Abstract
The microbial pollutions and nutrient matters of the southern part of Caspian Sea is to be under close scrutiny as it is vital to tourist health and environmental conservation.In this research, some physico-chemical factors, nutrient matters, oxygen demand parameters and microbial indices were investigated. ...
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The microbial pollutions and nutrient matters of the southern part of Caspian Sea is to be under close scrutiny as it is vital to tourist health and environmental conservation.In this research, some physico-chemical factors, nutrient matters, oxygen demand parameters and microbial indices were investigated. Sampling from nine sites along Astara to Chaboksar coastline were conducted with five replicates. The mean of temperature, Salinity, pH, phosphate, nitrate, FC, TC, BOD5 and COD were respectively obtained as 22.48°C, 8.5ppt, 8.27, 0.43mg/l, 2.21mg/l, 144MPN/100ml, 626.9MPN/100ml, 3.58mg/l and 9.43 mg/l. Maximum levels of nutrient matters were measured at Anzali and Kiyashahr sites. Results showed there are positive correlations between nutrient matters as well as COD with microbial indices. The average of microbial indices at nine sampling sites were higher than the permissible level of national and international organizations for swimming places. Due to high level of microbial pollution at Anzali and Chobar sampling sites, the swimming places of these areas require specific administration.
علوم زیستی دریا
Marjan Naseri Karimvand; yadollah nikpour; Ahmad Taghavi Moghadam; Kamal Ghanemi
Abstract
Gelatin is polypeptide with high molecular weight which is derived from collagen of connective tissue, skin, bone and tendons. The most common source of gelatin in the world is skin and bone of cow and pig. Gelatin from persian Gulfs jellyfish Crambionella orsini have been successfully extracted by alkaline ...
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Gelatin is polypeptide with high molecular weight which is derived from collagen of connective tissue, skin, bone and tendons. The most common source of gelatin in the world is skin and bone of cow and pig. Gelatin from persian Gulfs jellyfish Crambionella orsini have been successfully extracted by alkaline extraction.We investigated the proximate composition, gel strength, gelling point, melting point of jellyfish gelatin. Jellyfish gelatin contained 13.1% moisture, 1.3% lipid, 2.4% ash, 78.2% protein. The gelatin showed a gel strength of 33 kPa, a gelling point of 18°C, and melting point of 23°C. The gelatin was composed of α1-chain, α2-chain, β-chain, and γ-chain Jellyfish gelatin did not show superior rheological properties to mammalian gelatin, like other fish gelatin; however, it can be used in various food and cosmetic products not requiring high gel strength.
مهندسی دریا
M Kordnaeij; S.A Asghari Pari; S.M Sajjadi; M Shafai Bajestan
Abstract
In this study a porous obstacle was used to evaluate the performance of permeable obstacles for control of turbidity current. To build mathematical obstacle porous strata of 2.1 * 2.1 cm was used. 10 m long steep flume experiments are conducted. Tests were conducted in a double-dip 0 and 2.5 percent. ...
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In this study a porous obstacle was used to evaluate the performance of permeable obstacles for control of turbidity current. To build mathematical obstacle porous strata of 2.1 * 2.1 cm was used. 10 m long steep flume experiments are conducted. Tests were conducted in a double-dip 0 and 2.5 percent. Discharge constant in all tests was 0.7 liters per second. Feed concentration of 20 grams per liter of the concentrated flow and viscous flow in the upstream and downstream concentrations were measured porous barrier. Concentration was measured with use of a sampler flushing. The results showed that the porous barrier stepped porous barrier to the flow is better. Porous barrier stair staircase behind a thick flow of porous barrier and prevents over-stepped the stairs to the amount of sediment discharge reduced more.