Showing 9 results for Amrollahi Biuki
Fattaneh Talei Bejarbaneh, Narges Amrollahi Biuki, Mohammad Saddiq Mortazavi, ,
Volume 5, Issue 2 (Autumn 2015)
Abstract
Environmental pollution by heavy metals is one of the main problems in the environment. Biosorption, is inactivated or live and dead biomass is used for the removal of heavy metals. In this study, a micro alga (Cyanobacteria) Spirulina platensis was used as adsorbents for the remediation of copperfrom aqueous solution.The purpose of this research is to study the possibility or impossibility of copper heavy metal removal by cyanobacteria S. platensis under different environmental conditions. Bisorption of Copper under different conditions, including different concentrations of copper (10, 50, 100, 200 mg /L), pH (3, 4, 5, 6), time (30, 60, 120, 360 min) and the concentration of biomass non-living (0.5, 1, 1.5, 2 g / L) were studied. Finally, toincrease the efficiency of cyanobacteria were determined absorb theoptimal conditions using the Taguchi method. The optimization process of absorption, the bestamount of each of the parameters pH 5, and the weight of the algae S. platensis 0.5 g/L, 200mg/L for metal concentration and the time required was120 minutes. The results showed that the S. Platensisbiomassis suitable for economic development and efficient structures for the removal of heavy metals from aqueous solutions.
Najme Safari Shahvari, Narges Amrollahi Biuki, Ehsan Kamrani, Marzieh Razaghi,
Volume 5, Issue 3 (Winter 2016)
Abstract
In this study we examined the tubes of building polychaetes erpulidae family of Bandar Abbas coast. Sampling was done using hammer and Knife from the fisheries wharf body and tidal conditions were maximized. Polychaetes collected samples were placed in plastic bags and transported to the laboratory. Polychaetes samples with valid identification keys were identified. The relationship between measured morphological parameters (number of crown branches, operculum and peduncle length, width of the Thorax) was investigated and the results showed that there was no direct correlation between the length of worm and his tube, polychaetes length and body weight were assessed to determine the type of growth and results showed body length and weight of polychaetes showed negative algometric growth, also between the total length of body and the other measured parameters was observed a linear relationship. A significant correlation was not found between morphological parameters.
Sedigheh Pourreza, Narges Amrollahi Biuki, Mohammad Reza Taheri Zadeh,
Volume 5, Issue 4 (Spring 2016)
Abstract
In recent years, monitoring the amount of pollutants in aquatic ecosystems by quantity measures in water, sediment and fish tissue has shifted to the quality measures of pollutant effects on aquatic animals and assessment of aquatic animal health and, ultimately, the ecosystem. This research performed on three replicates has examined the histopathological response of hepatopancreas and gill in Metopograpsus messor crab exposed to cadmium pollutants. We prepared an aquarium that contained a 5 μg/L concentration of cadmium as well as a control group. After the start of the experiment, we sampled the crabs in 2 steps short-time (72 h) and long-time (14 days). After the routine histological procedures, we performed H & E staining. Oserved complications in the gills included: disruption of the pillar cells and collapsed lamellae, hyperplasia, necrosis, detached cuticle, club-shaped distal tips of gill lamellae, vacuolisation, malformation at the tip of the gills, slight lamellae distortion. In the hepatopancreas we observed formation of abnormal lumen, necrosis, thickened basal laminae, increased numbers of B-cells, presence of reserve inclusion, and dilation of the hemal sinuses. A comparison of the two groups showed a direct correlation between the duration and severity of damage.
Dara Mirzabagheri, Narges Amrollahi Biuki, Mohammad Reza Taheri Zadeh,
Volume 7, Issue 3 (winter 2018 2017)
Abstract
This study aimed to investigate the spatio-temporal changes in zoanthids abundances and to assess the influences of sea water parameters on their distribution. According to this, 2 sites in littoral zone of Hormuz Island were monthly studied from June 2015 to June 2016. Coverage range index (CRI) was also introduced as a new index in this study to assess the influence of the substrate composition on distribution of zoanthids. Line intercept transect method was performed to assess the zoanthid coverage along 6 transects. The results indicated significant relationship between substrate composition and coverage range of zoanthids. Hence, CRI proved to be a reliable index because of its strong fluctuations resulting mainly from total abundance of zoanthids. Also, the results indicated that zoanthids tended to colonize in low-littoral and mid-littoral zones, which are least exposed to air. Apparently, Zoanthus sansibaricus can tolerate desiccation conditions better than Palythoa cf. mutuki and Palythoa tuberculosa. From the results obtained, the abundances of 3 zoanthids during winter season showed an increasing trend, while during spring season it showed a reverse trend. Seasonal variations of sea water parameters were correlated with ecological attributes of species; where dissolved oxygen showed a positive significant correlation with mean seasonal abundance of each zoanthids at different study sites. Consequently, based on the findings of this study, zoanthids could be utilized as a bioindicator species of various environmental conditions in coastal waters.
Mojtaba Ghazizadeh, Rahim Abdi, Solmaz Shirali, Abdolali Movahedinia, Narges Amrollahi Biuki,
Volume 9, Issue 1 (Summer 2019)
Abstract
Sea snakes are the largest group of marine reptiles, but their role in the food chain in their habitats remains unknown. Histological studies of the oral cavity in sea snakes are essential to interpret food habits and to identify the structure of poison glands. The Present research is designed to study the Histology of the oral cavity in sea snake
Hydrophis cyanocinctus. For this purpose, 6 individuals of sea snakes were collected from Minab, Hormozgan. Then the sections were taken from the Palate and floor of the mouth. Sections were stained by H&E and PAS, and observed with a light microscope. The results showed that the epithelium was keratinized, stratified squamous, and specialized. The lamina propria contained lymphoid tissue. In the submucosa, the
nucleated RBC, Heterophil cells, and connective tissue cells were observed. The glandular tissue was serosal and the mucosal gland and the muscle layer were observed skeletal. Mucosal glands and some parts of epithelium were PAS-Positive. The results of this study showed that in spite of many similarities between the histological structures of
H. cyanocinctus and other snakes and reptiles, some significant structural differences exist in which can be defined as a specific model for sea snakes.
Sara Jamshidizadeh, Hamideh Abbasi, Narges Amrollahi Biuki,
Volume 9, Issue 3 (Winter 2019)
Abstract
In recent years, more efforts have been made to achieve the biological active metabolites from living organisms, especially marine organisms. In this study, the antimicrobial effects of stichodactyla hadooni extract was investigated. For this purpose, they were collected from depths of 5-8 meters by diving operations on the coasts of hormoz island and their extraction have done by using methanol, dichloromethane and acetone as organic solvents. The extracts were dried in a rotary dryer and transformed to powder form by vacuum freeze dryer. Then 3 strains of bacteria (vibrio alginolyticus, enterococcus faecalis and klebsiella planticola) were used for evaluation the antimicrobial activity of the extracts by using disk diffusion agar method. The results showed that methanol extract had the potential to inhibit the proliferation of all three strains of the bacteria, especially V. alginolyticus. The results of growth inhibition zone obtained from the extracts solved in dmso showed that high concentration of extracts could affect the gram positive bacteria, enterococcus faecalis.
Zahra Konarezadeh, Mohammad Reza Taheri Zadeh, Narges Amrollahi Biuki, Ahmad Noori,
Volume 10, Issue 1 (Summer 2020)
Abstract
This research was conducted to investigate the lethality concentration of Cadmium and Lead in species
Artemia Franciscana in laboratory conditions. Artemia was fed individually from the micro Algae
Isochrysis galbana and
Nannochloropsis oculata for seven days. Among the heavy metals, Cadmium and Lead, are oil pollution indicators and industrial activities in the marine ecosystem, Therefore, the type of response of these organisms to contaminants such as Lead and Cadmium, due to its increasing contamination, is very important. In this study, Artemia was exposed to 10 concentrations of (120 to 230 mg / L and one control group), Cadmium, and Lead. LC
5024h for Artemia fed with micro Algae
Isochrysisis galbana and Nannochloropsis oculata in the vicinity of Cadmium was 170 mg / L and 189 mg / L, respectively, and for the Lead metal in Artemia fed with both types of microalgae Equal to 180 mg/liter was obtained. The results of this study showed that Cadmium toxicity in Artemia fed with microalgae
I. galbana was higher than that of Lead, but the Lead toxicity of
N .oculata. fed with Artemia was higher than that of Cadmium.
Asieh Soleimanirad, Dr Mohammad Reza Taherizadeh, Dr Mohsen Safaie, Dr Narges Amrollahi Biuki,
Volume 11, Issue 4 (ُُSpring 2022)
Abstract
Sediment samples were collected from 8 sites in the northern areas of Qeshm Island, Iran to determine the total and partial concentrations of heavy metals including copper (Cu), lead (Pb), nickel (Ni), cadmium (Cd), and Iron (Fe), in February 2016. A combination of nitric acid and perchloric acid was used to determine the total concentrations and sequential extraction method was used to analyze the partial concentrations of different geochemical parts of the sediment. Metal concentrations were measured by flame atomic absorption spectrometry. Contamination factor (CF), pollution load indices (PLI), enrichment factor (EF), geoaccumulation index (Igeo), risk assessment code (RAC) and potential ecological risk (PER) were calculated to determine the ecological risk. The results showed that the concentrations of heavy metals were Fe>Ni>Pb>Cu>Cd, respectively. The results of sequential extraction showed that Cd (25.98%) and Cu (21.40%) had the highest bioavailability among the other heavy metals. Most of each element was in the part of reducible (Fe-Mn oxide bound) (F3) and residual (F5). According to the RAC, only Cu and Cd were identified as high-risk at Station 5, and for other stations and other metals, the results showed low, medium or no risk. Evaluation of enrichment factor showed significant contamination for most of the metals tested, including Cd, Ni and Pb, which confirms the results from other indices. Finally, it can be said that the results of various indices that have been measured in relation to the mentioned heavy metals, showed that these elements have low to moderate pollution in the study area.
Fatemeh Gol Doost Bas, Narges Amrollahi Biuki, Soolmaz Soleimani, Morteza Yousefzadi,
Volume 11, Issue 4 (ُُSpring 2022)
Abstract
Fish mucus layers are the main surface of exchange between fish and the environment, and they possess important biological and ecological functions. In the present study, the antioxidant activity (reducing power, total antioxidant capacity, and free radical scavenging of DPPH) and cytotoxicity (test of saltwater shrimp larvae) of four species of Solea elongate, Euryglossa orientalis, Netuma bilineata, Muraenesox cinereus were investigated. The results showed that E. orientalis fish mucus had the highest reducing power (1.6 ± 0.2), N. bilineata fish mucus had the highest total antioxidant capacity (0.93 ± 0.3) and the highest percentage of free radical scavenging DPPH (89 ± 0.2). In the cytotoxicity test, the highest mortality rate under the influence of S. elongate mucus was about 97.5 ± 2.5. The results of the present study showed that fish mucus can be introduced as a potential source of natural biological compounds with high antioxidant activity and cytotoxicity.
