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Essawy, Amina E.; El-Zoheiry, Abdelmoneim H; El‐Mofty, M.M.; Helal, Suzan F; El-Bardan, Ehab M

doi:10.2306/scienceasia1513-1874.2005.31.043

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…Furthermore, it was interesting to note the presence of sulphate groups in the two extracts since sulphate-containing polysaccharides of marine origin are quite important for industries (Ladrat et al 2014). In fact, these have been attracting attention due to a number of their unique physico-chemical properties (Raveendran et al 2013) as well as a number of their biological properties (Jesus Raposo et al 2013;El Essawy et al 2016;Heymann et al 2016), thereby further highlighting the potential of the two isolated exopolysaccharides as bioactive compounds. Wavenumber cm-1 Fig.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetics and antibacterial properties of exopolysaccharides from marine bacteria isolated from Mauritius seawater

et al. 2019

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Purpose The marine environment harbours diverse bacterial species which can be exploited for the production of valuable compounds such as exopolysaccharides (EPS) which hold promises for biotechnological applications. The coastal waters of Mauritius is a relatively underexplored marine environment and in this study, isolated bacterial species were tested for the production of EPS exhibiting antibacterial properties against human bacterial pathogens from the genera Acinetobacter, Bacillus, Campylobacter, Enterobacter, Enterococcus, Escherichia, Proteus, Pseudomonas, Salmonella, Streptococcus and Staphylococcus. Methods Bacteria were first isolated from seawater samples. Using the disc diffusion method, their EPS were tested for antibacterial effects through two screenings, with each involving a different set of arbitrarily chosen group of pathogens. The microorganisms producing antibacterial EPS were subsequently identified by morphological, biochemical and 16S rRNAbased phylogenetic analyses. Those EPS exhibiting broadest antibacterial activities were eventually characterised by Fouriertransform infrared spectroscopy (FTIR) and thin-layer chromatography (TLC). Results Eight EPS were found to display antibacterial effects against more than half of the pathogens and the microorganisms producing them were identified as Bacillus, Halomonas, Psychrobacter and Alcaligenes species. However, only two of these EPS were found to be the most active, with their MIC values ranging between 62.5 and 500 μg/ml. FTIR and TLC analyses revealed the presence of carboxyl, hydroxyl and amide as well as sulphate for the EPS, with glucose or fructose being the main sugar. Conclusion The results suggest that Mauritius seawater can be a source of biotechnologically useful microorganisms, producing EPS having potential as antimicrobial agents. DNA sequence data also suggest possible novel bacterial species.

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Section: Discussionmentioning

confidence: 99%

Phylogenetics and antibacterial properties of exopolysaccharides from marine bacteria isolated from Mauritius seawater

et al. 2019

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“…ztransverse reinforcement in concrete columns have many different forms such as ordinary-hoops, [4] continuous polygonal hoops, [5] welded grids, [6,7] multiple-spirals, [8][9][10][11][12] cross-spirals, [13][14][15] and interlocked spirals. [16][17][18][19] Each of these methods is able to satisfy the requirement to enhance the strength and ductility of confined concrete, but with each method, the geometry of the reinforcement changes and affects the strength and ductility of concrete.…”

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confidence: 99%

Analytical compressive stress–strain model for concrete confined with high‐strength multiple‐tied‐spiral transverse reinforcement

Cao

Jing

2017

Structural Design Tall Build

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Summary The behavior of reinforced concrete members subjected to seismic loads is mainly based on the ultimate strength of concrete and its ductility. Based on this, an additional configuration of transverse reinforcement using high‐strength multiple‐tied‐spiral was proposed to improve the strength and ductility of concrete. In this paper, an experimental study of a number of axial loading tests on reinforced concrete columns confined with high‐strength multiple‐tied‐spiral transverse reinforcement is described. The effects of spacing of circular spiral and rectangular hoop, the confined area of circular spiral and concrete strength on axial behavior of confined concrete were investigated. The formulas of confined compressive strength and corresponding axial strain, factor to control the slope of descending branch, and stress in high‐strength circular spiral at confined strength are proposed based on the test results. A stress–strain model is also proposed that is found to give reasonably good prediction of the experimental behavior of reinforced concrete (RC) columns confined by high‐strength multiple‐tied‐spiral transverse reinforcement.

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Effects of fluconazole based medicated feed on haemato-immunological responses and resistance of Labeo rohita against Saprolegnia parasitica

Saha

Pal

Sahu

et al. 2017

Fish & Shellfish Immunology

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Cited by 7 publications

References 7 publications

Phylogenetics and antibacterial properties of exopolysaccharides from marine bacteria isolated from Mauritius seawater

Phylogenetics and antibacterial properties of exopolysaccharides from marine bacteria isolated from Mauritius seawater

Analytical compressive stress–strain model for concrete confined with high‐strength multiple‐tied‐spiral transverse reinforcement

Effects of fluconazole based medicated feed on haemato-immunological responses and resistance of Labeo rohita against Saprolegnia parasitica

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