Biodiversity of macroscopic brown algae coastal area of Bushehr Province

The aim of this study was distinguish of biodiversity and abundance of brown algae in the coastal zone of the Bushehr province in the Persian Gulf during warm and cold seasons. The most and lowest density of brown algae was observed in the spring (33±20 Number in m^2) and in the autumn (17± 9Number in m^2), respectively. The highest density was belong to Cystoserriamyricawith (41±25 Number in m^2) and it also was dominant species among the six identified species of brown algae. The comparison result of diversity indices in different zone showed that the most amuont of Margalef index (0/438), and dominance and low diversity using primer software observed in within the mid tidal zone. The maximum value of the Shannon index (0/94) was belonged to the low and mid litoral zone. Seasonal comparison of diversity indices showed, the Most of species richness and dominance was revealed at autumn and highest indices of Shannon (0/76) was observed at spring. Totally, Species richness was the highest and lowest in the Nuclear power Plant and Ganaveh stations in two seasons respectively

Comparisons of anti-radical and antibacterial potential among macro algae from northern coasts of the Persian Gulf

The purpose of study was to evaluate the anti-oxidant and anti-bacterial activities of three species of green, brown and red algae from northern coast of the Persian Gulf, The study was performed using DPPH, FRAP, PMD and RP tests for anti-oxidant capability and disk diffusion and plate methods of ethanol extraction for anti-bacterial ability. In the current investigation, The best anti-oxidant activity and inhibition potential of DPPH free radicals and RP were shown in ethanol extract of Entromorpha intestinalis green algae and lowest values was detected in Cystoseira myrica brown algae.The highest anti-oxidant activity was measured by FRAP test in green algae E. intestinalis and the lowest anti-oxidant activity was obtained in the red algaeGracilaria corticata.The highest anti-oxidant activity with PMD test was found in the red algae G. corticata. However, anti-oxidant activity of the green algae E. Intestinalis was shown high activity with DPPH, FRAP, RP tests. Hydro-alcohol extraction of sea weed did not show any anti-bacterial properties

Antioxidant capacity and phenolic and flavonoid content of macro algae in the northern coasts of the Persian Gulf in Bushehr province

The purpose of this study was to evaluate the antioxidant properties of hydroalchoholic extractions of three species of green, brown and red algae. The highest and the lowest total phenol contents was in L. snyderia (113/9±0/69 mg gallic acid per gram of extract) and the green algae E. intestinalis (72/36±6/05 mg gallic acid per gram of extract) respectively. The highest values of total flavonoid was founded in the red algae L. snyderia (41/05±1/95 mg Rutin per gram of extract) however, the lowest values was (12/7±0/41 mg Rutin per gram of extract) in the brown alga C. trinodis. L. snyderia showed the most antioxidant activity, and C. trinodis had lowest amounts of antioxidant potential by the radical, azinobis ethylen benz thiazoline sulphonic acid (ABTS) test. There were significant differences between anti-oxidant activities of algae according the ABTS test

Study of distribution and diversity of Polychaeta due to impact bottom trawling in Bahrakan fishing area (Persian Gulf)

The study took place to survey the changes in diversity and distribution of Polychaetes in fishing area of Bahrakan, due to the trawling. Sampling was taken before (15 May) of trawling and two weeks (5 Sep) and three months (14 Nov) after trawling in 2010, in three period in Bahrakan coast. Therefore, eighteen stations placed with the depth of 6 meters and 10 meters.The amount abundance Polychaetes had decreased significantlyin both depths two weeks after trawling (P0.05). Only in 10m depth, abundance Polychaetes after three months comparing to two weeks after trawling had increased significantly (p<0.05). Changing biomass Polychaetes was similar to Changing abundance. After the trawling, small size individuals became dominant.Abundance Species ofCossura longicirrattahad increased in both depths in two weeks after the trawling. Also in both depths, Shannon Diversity and Margalef Species Richness indices showedprocess decreasing and Simpson dominant Index showedprocess increasing. In both depths, Pielou Evenness Index two after trawling had increased. While, after three months comparing to two weeks after trawling had decreased and most effects of trawling were on 6m depth

Cardiac abnormalities due to multisystem inflammatory syndrome temporally associated with Covid-19 among children: A systematic review and meta-analysis

Background: Cardiac defects due to multisystem inflammatory syndrome in children (MIS-C) have been abundantly reported leading high morbidity among children affected by Covid-19. We aimed to systematically assess the incidence of such cardiac abnormalities due to MIS-C in children suffering Covid-19. Methods: The manuscript databases including Medline, Web of knowledge, Google scholar, Scopus, and Cochrane were deeply searched by the two blinded investigators for all eligible studies based on the relevant keywords. The risk of bias for each study was assessed according to QUADAS-2 tool. Statistical analysis was performed using the Comprehensive Meta Analysis (CMA) software. Results: In final, 21 articles (including 916 children) were eligible for the final analysis that all yielded good quality and none of the citation was determined to have high risk of bias. Considering studies focusing different cardiac abnormalities related to MIS-C yielded a pooled prevalence of 38.0 for significant left ventricular dysfunction, 20.0 for coronary aneurism or dilatation, 28.1 for ECG abnormalities or cardiac arrhythmias, 33.3 for raised serum troponin level and 43.6 for raised proBNP/BNP level. Conclusion: Although cardiac abnormalities among children suffering Covid-19 are uncommon, in the context of the MIS-C can be common and therefore potentially serious and life threatening. © 202

Amniotic membrane seeded with mesenchymal adipose-derived stem cell for coverage of wound in third degree burn: An experimental study

Methods: This study was experimental and has been done in Burn Research Center of Iran University of Medical Sciences during January 2012 to April 2013. Thirty rats randomly divided to three equal groups. Inguinal fat of 10 rats (one group) were used for preparation of autologous adipose-derived mesenchymal stem cells. Acellular amnion was used as a scaffold for stem cell transfer. Each of the thirty rats had been exposed to a cm deep 3rd degree burn on back area. 24 hours after surgery, the wound was excised and it had been covered by three methods: conventional dressing in the first group, acellular amnion in the second group and acellular amnion seeded with adipose-derived stem cell in the third group. The rate of wound healing and pathologic characteristics was compared in all three groups. Results: Healing rate and decrease in wounds size was significantly better in acellular amnion seeded with adipose- derived stem cells compared with other two groups at 3rd and 15th days after surgery P&lt;0.01. Also in histopathology examination, fibroplasia and neovascularization of wounds were significantly better in stem cells group than the other two groups P&lt;0.001. Conclusion: Acellular amnion seeded with adipose-derived stem cell can result in faster wound healing and better histopathology characteristic. The amnion as a scaffold and the fat derived stem cells as healing accelerator are recommended for coverage of the 3rd degree burn wounds after excision and it may reduce the need for skin graft. Background: Stem cells are applied in the treatment of wide range of diseases and can be separated from different tissues of the body. These cells can treat diseases by cytokine and growth factor secretion and also cell differentiation. Burn wound is a challenging problem of reconstructive surgery and stem cells may help wound healing process. We designed this study to evaluate the beneficial effect of fat derived stem cells for coverage of 3rd degree burn wound. © 2014, Tehran University of Medical Sciences (TUMS). All rights reserved

Vibration Transfer Path Analysis and Path Ranking for NVH Optimization of a Vehicle Interior

By new advancements in vehicle manufacturing, evaluation of vehicle quality assurance has got a more critical issue. Today noise and vibration generated inside and outside the vehicles are more important factors for customers than before. So far several researchers have focused on interior noise transfer path analysis and the results have been published in related papers but each method has its own limitations. In present work, the vibration transfer path analysis and vibration path ranking of a car interior have been performed. As interior vibration is a source of structural borne noise problem, thus, the results of this research can be used to present the structural borne noise state in a vehicle. The proposed method in this paper does not need to disassemble the powertrain from the chassis. The procedure shows a good ability of vibration path ranking in a vehicle and is an effective tool to diagnose the vibration problem inside the vehicle. The simulated vibration spectrums in different speeds of the engine have a good compliance with the tested results; however, some incompatibilities exist and have been discussed in detail. The simulated results show the strength of the method in engine mount optimization

Vibration Transfer Path Analysis and Path Ranking for NVH Optimization of a Vehicle Interior

By new advancements in vehicle manufacturing, evaluation of vehicle quality assurance has got a more critical issue. Today noise and vibration generated inside and outside the vehicles are more important factors for customers than before. So far several researchers have focused on interior noise transfer path analysis and the results have been published in related papers but each method has its own limitations. In present work, the vibration transfer path analysis and vibration path ranking of a car interior have been performed. As interior vibration is a source of structural borne noise problem, thus, the results of this research can be used to present the structural borne noise state in a vehicle. The proposed method in this paper does not need to disassemble the powertrain from the chassis. The procedure shows a good ability of vibration path ranking in a vehicle and is an effective tool to diagnose the vibration problem inside the vehicle. The simulated vibration spectrums in different speeds of the engine have a good compliance with the tested results; however, some incompatibilities exist and have been discussed in detail. The simulated results show the strength of the method in engine mount optimization

A link between the phenomenological and physical modelling of transformation-induced plasticity

Computational Plasticity XII: Fundamentals and Applications - Proceedings of the 12th International Conference on Computational Plasticity - Fundamentals and Applications, COMPLAS 20131403-141

Experimental and numerical analysis of transient heat transfer from inclined tube bundles

This paper investigates the effects of tube arrangement and pitch on the performance of a single row bundle of bare tubes. A transient simulation is conducted to analyze flow and heat transfer characteristics of this problem. Velocity fields obtained from numerical simulation are validated against those obtained using particle image velocimetry in this work. Heat transfer and pressure drop for the flat bundle are found to be in good agreement with available data in the literature. In addition to flat bundles, two cases of inclined bundles, i.e., A and V frames, are investigated. Compared to a flat bundle, while these two cases lead to lower heat transfer rate by about 30% (maximum), the pressure drop of a flat bundle can be higher by about 60%. Finally, a correlation for predicting the drag coefficient as a function of maximum (bundle) velocity is presented