List of Articles Macroalgae

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  1 - Antimicrobial activity of grass kelp macroalgae (Ulva intestinalis) hydro-alcoholic extract on cultured Beluga (Huso huso) minced fish during refrigerated storage
  Mitra Daneshvar Ghorbani سید پژمان حسینی شکرابی Seyed Ebrahim Hosseini
  This study was carried out to investigate the possibility of using Ulva intestinalis macroalgae extract as a natural antibacterial agent in Beluga minced meat. For this purpose, the minimum of inhibitory concentration (MIC) of the hydroalcoholic extract of the algae was More

  This study was carried out to investigate the possibility of using Ulva intestinalis macroalgae extract as a natural antibacterial agent in Beluga minced meat. For this purpose, the minimum of inhibitory concentration (MIC) of the hydroalcoholic extract of the algae was determined in vitro by micro-well dilution method against Listeria monocytogenes pathogen. Then, the concentrations of controls (without any additive), BHT (as a synthetic antioxidant), MIC, 2 fold of the MIC (2MIC) and 3 fold of the MIC (3MIC) concentrations, were mixed with minced meat and refrigerated. Microbial properties of the samples including psychrophilic bacteria count, mesophilic bacteria count, Pseudomonas count and Enterobacteriaceae count were measured at 0, 4, 8, and 12 days. According to the results, the MIC was 12.5 mg/mL. The result of this study showed that the samples with the algae extract had less microbial load in comparison with control and BHT groups (p <0.01). Also, 3MIC showed the most antibacterial effect among other algae extract treatments by the lowest amount of mesophilic bacteria (6.27 Log cfu/g), cold (09.08 Log cfu/g) Pseudomonas (6.6 Log cfu/g) and Enterobacteriaceae (6.21 Log cfu/g) population size at the end of storage period. The results indicated that grass kelp macroalgae is a suitable species for use as a natural preservative, and the minced fish with three fold of the MIC concentration had less bacterial spoilage during the storage period in a refrigerator. Manuscript profile
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  2 - Compare the Toxicity of Silver Nanoparticles Produced by Biological and Chemical Methods on Artemia franciscana in Naupliar and Adult Stages
  S. Mashjoor M. Alishahi Z. Tulaby Dezfuly
  In this study, the toxicity of silver nanoparticles (AgNPs) and the difference in sensitivities in naupliar and adult stages of Artemia fransiscana, were evaluated to absorption of chemical and biosynthesized by the seaweed Ulva flexuosa, forms of AgNPs. The A. nauplii More

  In this study, the toxicity of silver nanoparticles (AgNPs) and the difference in sensitivities in naupliar and adult stages of Artemia fransiscana, were evaluated to absorption of chemical and biosynthesized by the seaweed Ulva flexuosa, forms of AgNPs. The A. nauplii and adult were exposed to additive serial concentration of biosynthetic and chemical AgNPs. Mortality in each group at the times of 12, 24, 36 and 48 h after exposure to AgNPs were recorded and analyzed via Probit software. The toxicity of these two types of AgNPs on A. nauplii and adult increased in a dose-dependent manner, but also their toxicity increased along with duration of exposure time. The toxicity of nanoparticles were significantly different (P<0.05). Therefore, after 48 h, the LC50 value of chemical AgNPs in the A. nauplii was 31.8 mg/l, while 48 h LC50 for biosynthesis AgNPs was 366.96 mg/l. While the concentration of the chemical AgNPs have assessed in adults artemia during exposure was 47 mg/l and for biosynthesis form of AgNPs was 240 mg/l. The chemical form of AgNPs was more toxic potential than a biosynthetic form of its. The sensitivity of A. nauplii to chemical AgNPs was more than to mature stage, but compared to biosynthesis form was less than adult. This research could be pioneer to the development of biocompatible functionality of nanoparticles with eco-management objectives. Manuscript profile