keyword
MENU ▼
Read by QxMD icon Read
search

marine algae

keyword
https://www.readbyqxmd.com/read/28726723/mertensene-a-halogenated-monoterpene-induces-g2-m-cell-cycle-arrest-and-caspase-dependent-apoptosis-of-human-colon-adenocarcinoma-ht29-cell-line-through-the-modulation-of-erk-1-2-akt-and-nf-%C3%AE%C2%BAb-signaling
#1
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
https://www.readbyqxmd.com/read/28722617/case-report-disseminated-shewanella-algae-infection-with-meningoencephalitis-in-a-traveler-secondary-to-marine-injury-in-madagascar
#2
Caroline Brulliard, Nicolas Traversier, Jérôme Allyn, Christopher Schaeffer, Bruno Bouchet, Nicolas Allou
Marine microorganisms such as Shewanella spp., Vibrio spp., and Aeromonas spp. can cause sepsis secondary to a wound infection in the context of swimming. These microorganisms are most often susceptible to fluoroquinolones. Here, we report a unique case of Shewanella algae bacteremia associated with meningoencephalitis and disseminated via hematogenous spread secondary to a skin injury. The patient suffered the injury while swimming in saline water during a cruise holiday in Madagascar, and she was initially treated with amoxicillin...
June 12, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28720836/calcifying-algae-maintain-settlement-cues-to-larval-abalone-following-algal-exposure-to-extreme-ocean-acidification
#3
Jennifer K O'Leary, James P Barry, Paul W Gabrielson, Laura Rogers-Bennett, Donald C Potts, Stephen R Palumbi, Fiorenza Micheli
Ocean acidification (OA) increasingly threatens marine systems, and is especially harmful to calcifying organisms. One important question is whether OA will alter species interactions. Crustose coralline algae (CCA) provide space and chemical cues for larval settlement. CCA have shown strongly negative responses to OA in previous studies, including disruption of settlement cues to corals. In California, CCA provide cues for seven species of harvested, threatened, and endangered abalone. We exposed four common CCA genera and a crustose calcifying red algae, Peyssonnelia (collectively CCRA) from California to three pCO2 levels ranging from 419-2,013 µatm for four months...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720331/a-novel-antihypertension-agent-sargachromenol-d-from-marine-brown-algae-sargassum-siliquastrum-exerts-dual-action-as-an-l-type-ca-2-channel-blocker-and-endothelin-a-b2-receptor-antagonist
#4
Byong-Gon Park, Woon-Seob Shin, Sangtae Oh, Gab-Man Park, Nam Ik Kim, Seokjoon Lee
We isolated the novel vasoactive marine natural products, (5E,10E)-14-hydroxy-2,6,10-trimethylpentadeca-5,10-dien-4-one (4) and sargachromenol D (5), from Sargassum siliquastrum collected from the coast of the East Sea in South Korea by using activity-guided HPLC purification. The compounds effectively dilated depolarization (50mMK(+))-induced basilar artery contraction with EC50 values of 3.52±0.42 and 1.62±0.63μM, respectively, but only sargachromenol D (5) showed a vasodilatory effect on endothelin-1 (ET-1)-induced basilar artery contraction (EC50=9...
July 6, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28717013/mechanisms-of-carbon-dioxide-acquisition-and-co2-sensing-in-marine-diatoms-a-gateway-to-carbon-metabolism
#5
REVIEW
Yusuke Matsuda, Brian M Hopkinson, Kensuke Nakajima, Christopher L Dupont, Yoshinori Tsuji
Diatoms are one of the most successful marine eukaryotic algal groups, responsible for up to 20% of the annual global CO2 fixation. The evolution of a CO2-concentrating mechanism (CCM) allowed diatoms to overcome a number of serious constraints on photosynthesis in the marine environment, particularly low [CO2]aq in seawater relative to concentrations required by the CO2 fixing enzyme, ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO), which is partly due to the slow diffusion rate of CO2 in water and a limited CO2 formation rate from [Formula: see text] in seawater...
September 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28713652/fungi-associated-with-mesophotic-macroalgae-from-the-au-au-channel-west-maui-are-differentiated-by-host-and-overlap-terrestrial-communities
#6
Benjamin J Wainwright, Geoffrey L Zahn, Heather L Spalding, Alison R Sherwood, Celia M Smith, Anthony S Amend
Mesophotic coral ecosystems are an almost entirely unexplored and undocumented environment that likely contains vast reservoirs of undescribed biodiversity. Twenty-four macroalgae samples, representing four genera, were collected from a Hawaiian mesophotic reef at water depths between 65 and 86 m in the 'Au'au Channel, Maui, Hawai'i. Algal tissues were surveyed for the presence and diversity of fungi by sequencing the ITS1 gene using Illumina technology. Fungi from these algae were then compared to previous fungal surveys conducted in Hawaiian terrestrial ecosystems...
2017: PeerJ
https://www.readbyqxmd.com/read/28711841/free-amino-acids-in-the-arctic-snow-and-ice-core-samples-potential-markers-for-paleoclimatic-studies
#7
Elena Barbaro, Andrea Spolaor, Ornela Karroca, Ki-Tae Park, Tõnu Martma, Elisabeth Isaksson, Jack Kohler, Jean Charles Gallet, Mats P Bjorkman, David Cappelletti, Gunnar Spreen, Roberta Zangrando, Carlo Barbante, Andrea Gambaro
The role of oceanic primary production on climate variability has long been debated. Defining changes in past oceanic primary production can help understanding of the important role that marine algae have in climate variability. In ice core research methanesulfonic acid is the chemical marker commonly used for assessing changes in past primary production. However, other organic compounds such as amino acids, can be produced and emitted into the atmosphere during a phytoplankton bloom. These species can be transported and deposited onto the ice cap in polar regions...
July 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28710898/projected-climate-changes-threaten-ancient-refugia-of-kelp-forests-in-the-north-atlantic
#8
Jorge Assis, Miguel B Araújo, Ester A Serrão
Intra-specific genetic variability is critical for species adaptation and evolution and yet it is generally overlooked in projections of the biological consequences of climate change. We ask whether ongoing climate changes can cause the loss of important gene pools from North Atlantic relict kelp forests that persisted over glacial-interglacial cycles. We use ecological niche modeling to predict genetic diversity hotspots for eight species of large brown algae with different thermal tolerances (Arctic to warm-temperate), estimated as regions of persistence throughout the Last Glacial Maximum (20,000 YBP), the warmer Mid-Holocene (6,000 YBP) and the present...
July 15, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28709108/vibrio-parahaemolyticus-and-v-alginolyticus-associated-meningo-encephalitis-in-a-bottlenose-dolphin-tursiops-truncatus-from-the-adriatic-coast-of-italy
#9
Ludovica Di Renzo, Gabriella Di Francesco, Chiara Profico, Cristina E Di Francesco, Nicola Ferri, Daniela Averaimo, Giovanni Di Guardo
A case of Vibrio parahaemolyticus- and V. alginolyticus-associated meningo-encephalitis in a bottlenose dolphin (Tursiops truncatus) found stranded along the Adriatic coast of Italy in 2016 is herein reported, along with a minireview on V. parahaemolyticus and V. alginolyticus infections in aquatic mammals. Macroscopically, two abscesses were found in the dolphin's forebrain, along with an extensive, bilateral, parasitic broncho-pneumonia. Histologically, a suppurative-to-pyogranulomatous meningo-encephalitis involved the brain but not the cerebellum...
July 1, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28699861/olleya-algicola-sp-nov-a-marine-bacterium-isolated-from-the-green-alga-ulva-fenestrata
#10
Olga I Nedashkovskaya, Song-Gun Kim, Natalia V Zhukova, Valery V Mikhailov
A strictly aerobic, Gram-stain-negative, rod-shaped, motile by gliding and yellow-pigmented bacterium, designated strain 3Alg 18T, was isolated from the Pacific green alga Ulva fenestrata. Phylogenetic analysis based on 16S rRNA gene sequences showed that the novel strain was affiliated to the family Flavobacteriaceae of the phylum Bacteroidetes, being most closely related to the type strains of recognized species of the genus Olleya, with 16S rRNA gene sequence similarity of 97.9-99.3 %. Strain 3Alg 18T grew in the presence of 0...
July 12, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28697977/potential-biomedical-applications-of-marine-algae
#11
REVIEW
Hui-Min David Wang, Xiao-Chun Li, Duu-Jong Lee, Jo-Shu Chang
Functional components extracted from algal biomass are widely used as dietary and health supplements with a variety of applications in food science and technology. In contrast, the applications of algae in dermal-related products have received much less attention, despite that algae also possess high potential for the uses in anti-infection, anti-aging, skin-whitening, and skin tumor treatments. This review, therefore, focuses on integrating studies on algae pertinent to human skin care, health and therapy...
June 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28695927/a-3d-printed-mini-hydrocyclone-for-high-throughput-particle-separation-application-to-primary-harvesting-of-microalgae
#12
Maira Shakeel Syed, Mehdi Rafeie, Rita Henderson, Dries Vandamme, Mohsen Asadnia, Majid Ebrahimi Warkiani
The separation of micro-sized particles in a continuous flow is crucial part of many industrial processes, from biopharmaceutical manufacturing to water treatment. Conventional separation techniques such as centrifugation and membrane filtration are largely limited by factors such as clogging, processing time and operation efficiency. Microfluidic based techniques have been gaining great attention in recent years as efficient and powerful approaches for particle-liquid separation. Yet the production of such systems using standard micro-fabrication techniques is proven to be tedious, costly and have cumbersome user interfaces, which all render commercialization difficult...
July 11, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28694102/evolution-of-dmsp-dimethylsulfoniopropionate-biosynthesis-pathway-origin-and-phylogenetic-distribution-in-polyploid-spartina-poaceae-chloridoideae
#13
Hélène Rousseau, Mathieu Rousseau-Gueutin, Xavier Dauvergne, Julien Boutte, Gaëlle Simon, Nathalie Marnet, Alain Bouchereau, Solène Guiheneuf, Jean-Pierre Bazureau, Jérôme Morice, Stéphane Ravanel, Francisco Cabello-Hurtado, Abdelkader Ainouche, Armel Salmon, Jonathan F Wendel, Malika L Ainouche
DMSP (dimethylsulfoniopropionate) is an ecologically important sulfur metabolite commonly produced by marine algae and by some higher plant lineages, including the polyploid salt marsh genus Spartina (Poaceae). The molecular mechanisms and genes involved in the DMSP biosynthesis pathways are still unknown. In this study, we performed comparative analyses of DMSP amounts and molecular phylogenetic analyses to decipher the origin of DMSP in Spartina that represents one of the major source of terrestrial DMSP in coastal marshes...
July 7, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28690794/an-evaluation-of-semi-automated-methods-for-collecting-ecosystem-level-data-in-temperate-marine-systems
#14
Kingsley J Griffin, Luke H Hedge, Manuel González-Rivero, Ove I Hoegh-Guldberg, Emma L Johnston
Historically, marine ecologists have lacked efficient tools that are capable of capturing detailed species distribution data over large areas. Emerging technologies such as high-resolution imaging and associated machine-learning image-scoring software are providing new tools to map species over large areas in the ocean. Here, we combine a novel diver propulsion vehicle (DPV) imaging system with free-to-use machine-learning software to semi-automatically generate dense and widespread abundance records of a habitat-forming algae over ~5,000 m(2) of temperate reef...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28676798/effect-of-sunflower-and-marine-oils-on-ruminal-microbiota-in-vitro-fermentation-and-digesta-fatty-acid-profile
#15
Julio E Vargas, Sonia Andrés, Timothy J Snelling, Lorena López-Ferreras, David R Yáñez-Ruíz, Carlos García-Estrada, Secundino López
This study using the rumen simulation technique (RUSITEC) investigated the changes in the ruminal microbiota and anaerobic fermentation in response to the addition of different lipid supplements to a ruminant diet. A basal diet with no oil added was the control, and the treatment diets were supplemented with sunflower oil (2%) only, or sunflower oil (2%) in combination with fish oil (1%) or algae oil (1%). Four fermentation units were used per treatment. RUSITEC fermenters were inoculated with rumen digesta...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28669477/taiwanese-marine-microbenthic-algal-communities-remain-similar-yet-chlorophyll-a-concentrations-rise-in-mesocosms-with-elevated-co2-and-temperature
#16
K S Tew, Y J Siao, P J Liu, W T Lo, P J Meng
The effects of increasing CO2 concentrations and temperature on microalgal assemblages were examined in Taiwan using mesocosms that simulate coral reef ecosystem. We assessed changes in abundance and diversity of benthic algae grown at 25°C and 28°C, under ambient (~400μatm) and at high CO2 conditions (800-1000μatm). Total alkalinity, pCO2, and the aragonite saturation state, were all significantly different between control and high CO2 treatments in both temperature treatments. Chl a concentration increased significantly in CO2-treated groups at 25°C, but benthic microalgal abundance was not significantly different...
June 29, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28662593/isolation-and-structure-elucidation-of-halymeniaol-a-new-antimalarial-sterol-derivative-from-the-red-alga-halymenia-floresii
#17
Srinu Meesala, Pratima Gurung, Krishanpal Karmodiya, Parameswaran Subrayan, Milind G Watve
A new mono-hydroxy acetylated sterol derivative: 12β-hydroxy-3β, 15α, 16β-triacetoxy-cholest-5-en-7-one (halymeniaol) (1), and cholesterol (2) were isolated from the marine red alga Halymenia floresii. The structure of the compound 1 (halymeniaol) was established from its spectral data, derived from HRMS/MS and 2D NMR. Compound 1 exhibited growth inhibitory activity against chloroquine-resistant Plasmodium falciparum 3D7 strain with an IC50 of 3.0 μM.
June 29, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28659451/costs-and-benefits-of-maternally-inherited-algal-symbionts-in-coral-larvae
#18
Valérie F Chamberland, Kelly R W Latijnhouwers, Jef Huisman, Aaron C Hartmann, Mark J A Vermeij
Many marine invertebrates provide their offspring with symbionts. Yet the consequences of maternally inherited symbionts on larval fitness remain largely unexplored. In the stony coral Favia fragum (Esper 1797), mothers produce larvae with highly variable amounts of endosymbiotic algae, and we examined the implications of this variation in symbiont density on the performance of F. fragum larvae under different environmental scenarios. High symbiont densities prolonged the period that larvae actively swam and searched for suitable settlement habitats...
June 28, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28647152/a-first-report-of-rare-earth-elements-in-northwestern-mediterranean-seaweeds
#19
Stefania Squadrone, Paola Brizio, Marco Battuello, Nicola Nurra, Rocco Mussat Sartor, Alessandro Benedetto, Daniela Pessani, Maria Cesarina Abete
The concentrations of rare earth elements (REE) were determined by ICP-MS in dominant seaweed species, collected from three locations of the northwestern Mediterranean Sea. This is the first study to define levels and patterns of REE in macro algae from these coastal areas. Rare elements are becoming emerging inorganic contaminants in marine ecosystems, due to their worldwide increasing applications in industry, technology, medicine and agriculture. Significant inter-site and interspecies differences were registered, with higher levels of REE in brown and green macro algae than in red seaweeds...
June 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28646435/eco-friendly-synthesis-of-silver-nanoparticles-using-green-algae-caulerpa-serrulata-reaction-optimization-catalytic-and-antibacterial-activities
#20
Eman F Aboelfetoh, Rania A El-Shenody, Mohamed M Ghobara
Stable colloidal silver nanoparticles (AgNPs) were synthesized using Caulerpa serrulata (green marine algae) aqueous extract as an efficient reducing and stabilizing agent. This method is considered to be a sustainable alternate to the more complicated chemical procedures. To achieve the optimization synthesis of AgNPs, several effects such as extract concentration, contact time, pH values, and temperature were examined. The synthesized AgNPs were characterized by UV-Vis spectroscopy, FT-IR, XRD, and HR-TEM...
July 2017: Environmental Monitoring and Assessment
keyword
keyword
46808
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"