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R Pandimurugan, S Thambidurai
Seaweed capped zinc oxide nanoparticles (SW-ZnO NPs) were prepared by simple chemical precipitation method of zinc nitrate in the presence of seaweed. The synthesised SW-ZnO NPs were characterised by FT-IR, UV-Visible spectroscopy, XRD and BET analysis. These metal oxides were coated on cotton fabric using pad dry cure technique. The SW-ZnO NPs coated cotton fabrics, the surface morphology and chemical composition was analysed by HR-SEM with EDAX. The antibacterial activity of uncoated cotton, seaweed extract and SW-ZnO NPs coated cotton fabrics were investigated against Gram positive (S...
July 18, 2017: International Journal of Biological Macromolecules
Fabrizio Gianni, Fabrizio Bartolini, Alexis Pey, Mathieu Laurent, Gustavo M Martins, Laura Airoldi, Luisa Mangialajo
Canopy-forming algae are declining globally due to multiple disturbances. This decline has recently been on the increase due to the spread of some tropical herbivorous fishes. This new phenomenon has drawn attention to the effects of fish herbivory in temperate areas, which have been assumed to be negligible compared to that of invertebrates, such as sea urchins. In this study, the impact of a Mediterranean native herbivorous fish (Sarpa salpa, salema) was assessed on the canopy-forming seaweed Cystoseira amentacea var...
July 20, 2017: Scientific Reports
Safa Tarhouni-Jabberi, Ons Zakraoui, Efstathia Ioannou, Ichrak Riahi-Chebbi, Meriam Haoues, Vassilios Roussis, Riadh Kharrat, Khadija Essafi-Benkhadir
Conventional treatment of advanced colorectal cancer is associated with tumor resistance and toxicity towards normal tissues. Therefore, development of effective anticancer therapeutic alternatives is still urgently required. Nowadays, marine secondary metabolites have been extensively investigated due to the fact that they frequently exhibit anti-tumor properties. However, little attention has been given to terpenoids isolated from seaweeds. In this study, we isolated the halogenated monoterpene mertensene from the red alga Pterocladiella capillacea (S...
July 20, 2017: Marine Drugs
Giulia Corona, Maria Magdalena Coman, Yuxuan Guo, Sarah Hotchkiss, Chris Gill, Parveen Yaqoob, Jeremy P E Spencer, Ian Rowland
SCOPE: Unlike other classes of polyphenols, there is a lack of knowledge regarding brown seaweed phlorotannins and their bioactivity. We investigated the impact of in vitro gastrointestinal digestion and colonic fermentation on the bioactivity of a seaweed phlorotannin extract from Ascophyllum nodosum and its high molecular weight (HMW) and low molecular weight (LMW) fractions. METHODS AND RESULTS: The highest phlorotannin and total polyphenol (TP) concentration was observed in the HMW fraction...
July 18, 2017: Molecular Nutrition & Food Research
Aaron P Ramus, Brian R Silliman, Mads S Thomsen, Zachary T Long
While invasive species often threaten biodiversity and human well-being, their potential to enhance functioning by offsetting the loss of native habitat has rarely been considered. We manipulated the abundance of the nonnative, habitat-forming seaweed Gracilaria vermiculophylla in large plots (25 m(2)) on southeastern US intertidal landscapes to assess impacts on multiple ecosystem functions underlying coastal ecosystem services. We document that in the absence of native habitat formers, this invasion has an overall positive, density-dependent impact across a diverse set of ecosystem processes (e...
July 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
M Triki, I Khemakhem, I Trigui, R Ben Salah, S Jaballi, C Ruiz-Capillas, M A Ayadi, H Attia, S Besbes
This work aims at reducing the use of added NaCl in processed meat products because of its negative effects on hypertensive population by replacing it by sodium-free salts mixture (SM: KCl, MgCl2 and CaCl2) in fresh and cooked sausages. The technological, sensory, and microbiological effects of SM were compared with a commercial replacer based on seaweed extracts (AlgySalt®). A total substitution of NaCl with the latter and a partial one with SM (80% and 50%) were studied in cooked sausages and a total NaCl substitution with both substitutes was performed in fresh sausages...
July 11, 2017: Meat Science
Schery Umanzor, Lydia Ladah, José A Zertuche-González
Intertidal macroalgae can modulate their biophysical environment by ameliorating physical conditions and creating habitats. Exploring how seaweed aggregations made up of different species at different densities modify the local environment may help explain how associated organisms respond to the attenuation of extreme physical conditions. Using Silvetia compressa, Chondracanthus canaliculatus and Pyropia perforata, we constructed monocultures representing the leathery, corticated and foliose functional-forms as well as a mixed tri-culture assemblage including the former three, at four different densities...
July 14, 2017: Journal of Phycology
Melissa Gardiner, Adam M Bournazos, Claudia Maturana-Martinez, Ling Zhong, Suhelen Egan
Climate fluctuations have been linked to an increased prevalence of disease in seaweeds, including the red alga Delisea pulchra, which is susceptible to a bleaching disease caused by the bacterium Nautella italica R11 under elevated seawater temperatures. To further investigate the role of temperature in the induction of disease by N. italica R11, we assessed the effect of temperature on the expression of the extracellular proteome (exoproteome) in this bacterium. Label-free quantitative mass spectrometry was used to identify 207 proteins secreted into supernatant fraction, which is equivalent to 5% of the protein coding genes in the N...
2017: Frontiers in Microbiology
Kajal Chakraborty, Bini Thilakan, Vamshi Krishna Raola
Brown seaweed Anthophycus longifolius (Turner) Kützing (family Sargassaceae) associated heterotrophic bacterium Bacillus subtilis MTCC 10403 was found to be a potent isolate with broad range of antibacterial activity against important perceptive food pathogens Vibrio parahaemolyticus, V. vulnificus, and Aeromonas hydrophila. This bacterium was positive for polyketide synthetase gene (KC589397), and therefore, was selected to bioprospect specialized metabolites bearing polyketide backbone. Bioactivity-guided chromatographic fractionation of the ethyl acetate extract of the seaweed-associated bacterium segregated four homologous polyketide furanoterpenoids with potential antibacterial activities against clinically important pathogens...
July 10, 2017: Phytochemistry
Atsuhito Toyomaki, Minori Koga, Emiko Okada, Yukiei Nakai, Akane Miyazaki, Akiko Tamakoshi, Yoshinobu Kiso, Ichiro Kusumi
Several studies indicate that dietary habits are associated with mental health. We are interested in identifying not a specific single nutrient/food group but the population preferring specific food combinations that can be related to mental health. Very few studies have examined relationships between dietary patterns and multifaceted mental states using cluster analysis. The purpose of this study was to investigate population-level dietary patterns associated with mental state using cluster analysis. We focused on depressive state, sleep quality, subjective well-being, and impulsive behaviors using rating scales...
2017: PloS One
Anna V Skriptsova
The water-soluble polysaccharides of brown algae attract the increasing attention of researchers as an important class of polymeric materials of biotechnological interest. The sole source for production of these polysaccharides has been large brown seaweeds such as members of Laminariales and Fucales. A new source of water-soluble polysaccharides is suggested here: it is a filamentous brown alga Streblonema sp., which can be cultivated under controlled conditions in photobioreactors that allow obtaining algal biomass with reproducible content and quality of polysaccharides...
July 11, 2017: Marine Biotechnology
Ruhana Hassan, Suet Yee Lee, Wan Zabidii Wan Morni
Sea star (class Asteroidea, phylum Echinodermata) is one of the most successful marine organisms inhabiting a wide range of habitats. As one of the key stone species, sea stars are responsible for maintaining much of the local diversity of species within certain communities. Malaysian Exclusive Economic Zone (EEZ) Resource Survey had been carried out from 16th Aug to 6th Nov 2015 and one of the invertebrate by-catch organisms is sea star Stellaster childreni Gray, 1840. This study documents morphological characters and diet of the sea star, besides providing brief descriptions of the habitats based on particle size analysis and vessel log data sheet...
2017: TheScientificWorldJournal
Intissar Kammoun, Intidhar Bkhairia, Fatma Ben Abdallah, Imen Jaballi, Naourez Ktari, Ons Boudawara, Moncef Nasri, Neji Gharsallah, Ahmed Hakim, Ibtissem Ben Amara
CONTEXT: Polysaccharides (PSs) from seaweeds have been reported to possess biological activity of potential medicinal values. OBJECTIVE: The current study was conducted to establish the protective effects of PS extracted from Ulva lactuca against oxidative stress induced by Thiacloprid (THC) in the rat reproductive system. MATERIALS AND METHODS: Rats were exposed either to THC, THC + PS (100 mg/kg), or THC + PS (200 mg/kg). RESULTS: Our study showed that THC induced severe disorders in the functional sperm parameters...
July 10, 2017: Archives of Physiology and Biochemistry
I P Shanura Fernando, K K Asanka Sanjeewa, Kalpa W Samarakoon, Won Woo Lee, Hyun-Soo Kim, Nalae Kang, P Ranasinghe, Hyi-Seung Lee, You-Jin Jeon
Fucoidans are an interesting group of bioactive sulfated polysaccharides abundant in brown seaweeds. The current study highlights the enrichment and extraction of fucoidan from Chnoospora minima by means of enzyme-assistant extraction using Celluclast and evaluation of its anti-inflammatory potential through in vitro and in vivo studies. The purified C. minima fucoidan (F2,4) inhibited the nitrous oxide (NO) production (IC50=27.82±0.88μg/ml) and expression of PGE2 through the subsequent downregulation of iNOS and COX-2 expression in lipopolysaccharide (LPS) stimulated RAW 264...
July 6, 2017: International Journal of Biological Macromolecules
Ajith J Kings, R Edwin Raj, L R Monisha Miriam, M Adhi Visvanathan
The environmental and culture conditions of a potential microalgae Euglena sanguinea were optimized for maximizing the biomass productivity. It was found that the organic macronutrient from poultry litter and organic micronutrient of seaweed extract are very effective to enhance the lipid production. Complementing, these organic nutrients with commercial NPK fertilizer, boost up the lipid productivity by 30.9% in comparison with the established standard Euglena medium. The fatty acid profile of the extracted oil by GC-MS reveals its conformity with commercial diesel...
June 26, 2017: Bioresource Technology
Rubén Villares, Emilio Carral, Carlos Carballeira
In this study we compared the accumulation of eight metals and two metalloids in the growing tips and the remaining shoot tissue of three species of brown seaweeds commonly used in biomonitoring studies (Fucus ceranoides, Fucus spiralis and Ascophyllum nodosum). Regression analysis of the data obtained showed that there was no statistically significant difference in accumulation in numerous cases; although most of the relationships were significant, many of the coefficients of determination were low. However, the concentrations of Mn and Zn in the growing tips were closely related to the concentrations in the rest of the tissue in all three species, possibly due to redistribution of these elements...
July 6, 2017: Bulletin of Environmental Contamination and Toxicology
Pernille Kjersgaard Bech, Mikkel Schultz-Johansen, Mikkel Andreas Glaring, Tristan Barbeyron, Mirjam Czjzek, Peter Stougaard
A novel bacterial strain, S66T, was isolated from eelgrass collected on the coastline of Zealand, Denmark. Polyphasic analyses involving phenotypic, phylogenetic and genomic methods were used to characterize strain S66T. The strain was Gram-reaction-negative, rod-shaped, aerobic, and displayed growth at 10-25 °C (optimum 20-25 °C) and at pH 7-9 (optimum pH 7.5). Furthermore, strain S66T grew on seaweed polysaccharides agar, agarose, porphyran, κ-carrageenan, alginate and laminarin as sole carbon sources...
July 3, 2017: International Journal of Systematic and Evolutionary Microbiology
Shinya Furukawa, Takenori Sakai, Tetsuji Niiya, Hiroaki Miyaoka, Teruki Miyake, Shin Yamamoto, Koutatsu Maruyama, Keiko Tanaka, Teruhisa Ueda, Hidenori Senba, Masamoto Torisu, Hisaka Minami, Takeshi Tanigawa, Bunzo Matsuura, Yoichi Hiasa, Yoshihiro Miyake
AIMS/INTRODUCTION: No reports have been published on the association between dietary intake habits and nocturia in the diabetes population. We therefore estimate this issue among Japanese patients with diabetes mellitus. MATERIALS AND METHODS: Study subjects in the present study were 785 Japanese patients with type 2 diabetes mellitus. Self-administrated questionnaires were used to assess each type of dietary intake habits. Vegetable intake habit was assessed by the following question: Do you have vegetables or seaweed every day?" We used the following two outcomes: 1) nocturia: ≥ 2 voids per night and 2) severe nocturia: ≥ 3 voids per night...
July 1, 2017: Journal of Diabetes Investigation
Mariola Belda-Antolí, Carolina Padrón-Sanz, Dolores Cejalvo-Lapeña, Beatriz Prieto-Moure, Jose Miguel Lloris-Cejalvo, Jose Miguel Lloris-Carsí
BACKGROUND: Seaweed has been associated with the prevention and/or treatment of various diseases related to oxidative stress because of its antioxidant activity. We investigated the protective potential of extract of Himanthalia elongata against ischemia-reperfusion (I/R) injury in the intestine of rats. METHODS: Seventy-two (72) male Wistar albino rats were randomly assigned into 12 groups as follows: sham, I/R only, I/R plus vehicle at 3 time points, and I/R plus extract at 3 time points...
June 27, 2017: Surgery
Mami Tanaka, Shoko Endo, Fumihito Kotake, Nurhidayu Al-Saari, A K M Rohul Amin, Gao Feng, Sayaka Mino, Hidetaka Doi, Yoshitoshi Ogura, Tetsuya Hayashi, Wataru Suda, Masahira Hattori, Isao Yumoto, Toko Sawabe, Tomoo Sawabe, Toshiyoshi Araki
A novel strain Vibrio aphrogenes sp. nov. strain CA-1004T isolated from the surface of seaweed collected on the coast of Mie Prefecture in 1994 [1] was characterized using polyphasic taxonomy including multilocus sequence analysis (MLSA) and a genome based comparison. Both phylogenetic analyses on the basis of 16S rRNA gene sequences and MLSA based on eight protein-coding genes (gapA, gyrB, ftsZ, mreB, pyrH, recA, rpoA, and topA) showed the strain could be placed in the Rumoiensis clade in the genus Vibrio...
2017: PloS One
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