Base de dados : MEDLINE
Pesquisa : B05.080.750 [Categoria DeCS]
Referências encontradas : 2306 [refinar]
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  1 / 2306 MEDLINE  
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[PMID]:29458481
[Au] Autor:Choi S; Kang JW; Yoon JH; Seong CN
[Ad] Endereço:1​Department of Biology, College of Life Science and Natural Resources, Sunchon National University, Suncheon 57922, Republic of Korea.
[Ti] Título:Dokdonia flava sp. nov., isolated from the seaweed Zostera marina.
[So] Source:Int J Syst Evol Microbiol;68(3):899-904, 2018 Mar.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A non-motile, proteorhodopsin-containing, yellow and rod-shaped bacterial strain, designated ZODW10 , was isolated from the seaweed Zostera marina collected from the West Sea, Republic of Korea. Cells were Gram-stain-negative, aerobic and non-motile. The isolate required sea salts for growth. A carotenoid pigment was produced. A phylogenetic tree based on 16S rRNA gene sequences showed that strain ZODW10 forms an evolutionary lineage within the radiation enclosing members of the genus Dokdonia with Dokdoniadiaphoros CIP 108745 (96.7 % sequence similarity) as its nearest neighbour. The major fatty acids were iso-C15:0, iso-C17 : 0 3-OH and iso-C15 : 1 G. Strain ZODW10 contained menaquinone 6 (MK-6) and phosphatidylethanolamine, an unidentified aminolipid and an unidentified polar lipid as the only isoprenoid quinone and the major polar lipids, respectively. The DNA G+C content of strain ZODW10 was 36 mol%. On the basis of the present polyphasic characterization, it is suggested that the isolate represents a novel species of the genus Dokdonia, for which the name Dokdonia flava sp. nov. (type strain, ZODW10 =KCTC 52953 =JCM 32293 ) is proposed.
[Mh] Termos MeSH primário: Flavobacteriaceae/classificação
Filogenia
Alga Marinha/microbiologia
Zosteraceae/microbiologia
[Mh] Termos MeSH secundário: Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Flavobacteriaceae/genética
Flavobacteriaceae/isolamento & purificação
Fosfatidiletanolaminas/química
Pigmentação
RNA Ribossômico 16S/genética
República da Coreia
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phosphatidylethanolamines); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 39382-08-6 (phosphatidylethanolamine); 71ANL51TLA (menaquinone 6)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180221
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002607


  2 / 2306 MEDLINE  
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[PMID]:27775388
[Au] Autor:Zhou J
[Ad] Endereço:School of Mathematics and Statistics, Southwest University, Chongqing, 400715, China. email: jzhouwm@gmail.com.
[Ti] Título:Bifurcation analysis of a diffusive plant-wrack model with tide effect on the wrack.
[So] Source:Math Biosci Eng;13(4):857-885, 2016 08 01.
[Is] ISSN:1551-0018
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This paper deals with the spatial, temporal and spatiotemporal dynamics of a spatial plant-wrack model. The parameter regions for the stability and instability of the unique positive constant steady state solution are derived, and the existence of time-periodic orbits and non-constant steady state solutions are proved by bifurcation method. The nonexistence of positive nonconstant steady state solutions are studied by energy method and Implicit Function Theorem. Numerical simulations are presented to verify and illustrate the theoretical results.
[Mh] Termos MeSH primário: Modelos Biológicos
Fenômenos Fisiológicos Vegetais
Ondas de Maré
[Mh] Termos MeSH secundário: Simulação por Computador
Alga Marinha/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE
[do] DOI:10.3934/mbe.2016021


  3 / 2306 MEDLINE  
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[PMID]:29297847
[Au] Autor:Yang SH; Oh JH; Seo HS; Lee JH; Kwon KK
[Ad] Endereço:Marine Biotechnology Research Center, Korea Institute of Ocean Science and Technology, 385 Haeyang-ro, Busan 49111, Republic of Korea.
[Ti] Título:Marinirhabdus citrea sp. nov., a marine bacterium isolated from a seaweed.
[So] Source:Int J Syst Evol Microbiol;68(2):547-551, 2018 Feb.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A gram-stain-negative, aerobic, rod-shaped (1.3-1.9×0.3-0.5 µm) and non-motile marine bacterium, designated MEBiC09412 , was isolated from seaweed collected at Yeonggwang County, South Korea. 16S rRNA gene sequence analysis demonstrated that strain MEBiC09412 shared high sequence similarity with Marinirhabdus gelatinilytica NH83 (95.4 %). Growth was observed at 17-38 °C (optimum 30 °C), at pH 4.0-8.5 (optimum pH 7.0) and with 0.5-6.0 % (w/v; optimum 2.5 %) NaCl. The predominant cellular fatty acids were iso-C15 : 0 (27.4 %), iso-C15 : 1 G (9.6 %), anteiso-C15 : 0 (14.6 %), iso-C16 : 0 (6.2 %), iso-C17 : 0 3OH (13.2 %) and summed feature 3 (comprising C16 : 1ω6c and/or C16 : 1ω7c; 7.4 %). The DNA G+C content was determined to be 43.1 mol%, while the major respiratory quinone was menaquinone-6. Several phenotypic characteristics such as indole production, the oxidizing patterns of several carbohydrtaes (of glucose, fructose, sucrose, maltose, mannose etc.) and organic acids, and the enzyme activities of α-chymotrypsin and α-glucosidase differentiated strain MEBiC09412 from M. gelatinilytica NH83 . On the basis of this polyphasic taxonomic data, strain MEBiC09412 should be classified as a novel species of the genus Marinirhabduswith the suggested name Marinirhabdus citrea sp. nov. The type strain is MEBiC09412 (=KCCM 43216 =JCM 31588 ).
[Mh] Termos MeSH primário: Flavobacteriaceae/classificação
Filogenia
Alga Marinha/microbiologia
[Mh] Termos MeSH secundário: Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Flavobacteriaceae/genética
Flavobacteriaceae/isolamento & purificação
RNA Ribossômico 16S/genética
República da Coreia
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 71ANL51TLA (menaquinone 6)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180104
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002539


  4 / 2306 MEDLINE  
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[PMID]:29175758
[Au] Autor:Maciel OMC; Tavares RSN; Caluz DRE; Gaspar LR; Debonsi HM
[Ad] Endereço:Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto - University of Sao Paulo, Ribeirao Preto, Brazil.
[Ti] Título:Photoprotective potential of metabolites isolated from algae-associated fungi Annulohypoxylon stygium.
[So] Source:J Photochem Photobiol B;178:316-322, 2018 Jan.
[Is] ISSN:1873-2682
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Natural products, or secondary metabolites, obtained from fungal species associated with marine algae have been widely used in sunscreens due to their antioxidant activity and protective potential against solar radiation. The endophytic fungus isolated from Bostrychia radicans algae collected in the Rio Escuro mangrove, São Paulo State, Brazil, Annulohypoxylon stygium (Xylariaceae family) was studied to evaluate the photoprotective potential of its metabolites. The Annulohypoxylon genus can produce secondary metabolites with interesting cytotoxic, antibacterial and antioxidant properties and was never isolated before from a marine alga or had its metabolites studied for UV protection. The fungal culture (code As) extracted with dichloromethane: methanol (2:1) yielded 9 fractions (Asa to Asi) which were submitted to different chromatographic methodologies to obtain pure compounds, and to spectroscopic methodologies to elucidate their structures. Also, a screening was conducted to evaluate the qualitative production of the metabolites, besides the absorption in the UVA/UVB range, their photostability and phototoxicity potential using the 3T3 NRU phototoxicity test (OECD TG 432). This study led to the isolation of a novel compound, 3-benzylidene-2-methylhexahydropyrrolo [1,2-α] pyrazine-1,4-dione (1), from fractions Ase3 and Asf3; Ase1 was identified as 1-(1,3-Benzodioxol-5-yl)-1,2-propanediol (2), two metabolites were isolated as diastereomers (1S,2R)-1-phenyl-1,2-propanediol (3) from Asd2 and (1R,2R)-1-phenyl-1,2-propanediol (4) from Asd3, and Ase1 and 1,3-benzodioxole-5-methanol (5) from Asc1. The results obtained showed a great potential source of new molecules to be used as UVB filters in sunscreens, since substances 1-2 presented UVB absorption, had no phototoxic potential and were considered photostable. In conclusion, these compounds can be considered as a potential new class of molecules for photoprotection, since their photosafety and non-cytotoxicity were predicted using in vitro methods for topical use. Meanwhile, further efficacy assays shall be conducted for the establishment of their Sun Protection Factor (SPF). Also, this work provided new information concerning the metabolic profile of A. stygium, since it was possible to obtain two enantiomer compounds (3) and (4). One of them belonged to the same skeleton, but with a methylenedioxy moiety, showing the richest enzymatic pattern for this microorganism.
[Mh] Termos MeSH primário: Ascomicetos/metabolismo
Produtos Biológicos/química
Substâncias Protetoras/química
[Mh] Termos MeSH secundário: Células 3T3
Animais
Produtos Biológicos/isolamento & purificação
Produtos Biológicos/farmacologia
Sobrevivência Celular/efeitos dos fármacos
Sobrevivência Celular/efeitos da radiação
Espectroscopia de Ressonância Magnética
Camundongos
Conformação Molecular
Substâncias Protetoras/isolamento & purificação
Substâncias Protetoras/farmacologia
Alga Marinha/microbiologia
Espectrofotometria Ultravioleta
Fator de Proteção Solar
Raios Ultravioleta
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biological Products); 0 (Protective Agents)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171128
[St] Status:MEDLINE


  5 / 2306 MEDLINE  
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[PMID]:29311445
[Au] Autor:Somura Y; Kimoto K; Oda M; Okutsu Y; Kato R; Suzuki Y; Siki D; Hirai A; Akiba T; Shinkai T; Sadamasu K
[Ad] Endereço:Tokyo Metropolitan Institute of Public Health.
[Ti] Título:[Serial Food Poisoning Outbreaks Caused by Norovirus-Contaminated Shredded Dried Laver Seaweed Provided at School Lunch, Tokyo, 2017].
[So] Source:Shokuhin Eiseigaku Zasshi;58(6):260-267, 2017.
[Is] ISSN:1882-1006
[Cp] País de publicação:Japan
[La] Idioma:jpn
[Ab] Resumo:In February 2017, four food poisoning outbreaks occurred in Tokyo, involving ten schools. Shredded dried laver seaweed processed by a single food manufacturer in December 2016 was provided in common for the school meals that caused all four outbreaks. Of 4,209 persons exposed, 1,193 (28.3%) had symptoms of gastroenteritis. Norovirus (NoV) GII was detected in 207 (78.1%) of 265 cases by real-time RT-PCR. Thirty-one shredded dried laver seaweed samples were examined and seven (22.6%) of them were positive for NoV GII. PCR fragments of NoV ORF1/2 junction region (302 bp) from seven shredded dried laver seaweed samples and 20 clinical samples derived from the four outbreaks were sequenced. All of them displayed complete homology, and the genotype was classified as GII.17. A nearly full-length sequence (7,420 bp) of NoV RNA derived from a case was obtained by next-generation sequencer analysis and phylogenetic analysis indicated that this strain belongs to the same cluster as Hu/GII/JP/2015/GII.P17_GII.17/Kawasaki308. Thus, our investigation elucidated that the causative agent of these four serial food poisoning outbreaks was NoV GII.17 and the infectious source was a single batch of shredded dried laver seaweed. The water activity of the shredded dried laver seaweed was found to be 0.119 to 0.129. It was epidemiologically clarified that NoV does not lose infectivity for about two months even in the dry state. We conclude that a large diffuse outbreak of food poisoning caused by NoV GII.17 contamination of shredded dried laver seaweed had occurred in Tokyo. Our elucidation of the causative agent indicated that the food poisoning outbreaks in multiple areas of Japan, including Tokyo, during January to February 2017 were caused by the same contaminated food.
[Mh] Termos MeSH primário: Infecções por Caliciviridae/etiologia
Infecções por Caliciviridae/virologia
Surtos de Doenças/estatística & dados numéricos
Análise de Alimentos
Contaminação de Alimentos/análise
Doenças Transmitidas por Alimentos/etiologia
Doenças Transmitidas por Alimentos/virologia
Almoço
Norovirus/isolamento & purificação
Instituições Acadêmicas/estatística & dados numéricos
Alga Marinha/virologia
[Mh] Termos MeSH secundário: Infecções por Caliciviridae/epidemiologia
Cobicistat
Combinação de Medicamentos
Emtricitabina
Doenças Transmitidas por Alimentos/epidemiologia
Norovirus/classificação
Norovirus/genética
Quinolonas
RNA Viral/isolamento & purificação
Tenofovir/análogos & derivados
Fatores de Tempo
Tóquio/epidemiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drug Combinations); 0 (Quinolones); 0 (RNA, Viral); 0 (genovoya); 99YXE507IL (Tenofovir); G70B4ETF4S (Emtricitabine); LW2E03M5PG (Cobicistat)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180123
[Lr] Data última revisão:
180123
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180110
[St] Status:MEDLINE
[do] DOI:10.3358/shokueishi.58.260


  6 / 2306 MEDLINE  
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[PMID]:29240755
[Au] Autor:Cao M; Wang D; Mao Y; Kong F; Bi G; Xing Q; Weng Z
[Ad] Endereço:Key Laboratory of Marine Genetics and Breeding (OUC), Ministry of Education, Qingdao, P.R. China.
[Ti] Título:Integrating transcriptomics and metabolomics to characterize the regulation of EPA biosynthesis in response to cold stress in seaweed Bangia fuscopurpurea.
[So] Source:PLoS One;12(12):e0186986, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Bangia fuscopurpurea is a traditional mariculture crop having high nutritional value, eicosapntemacnioc acid (EPA) production, and protein content. As an intertidal species, it can tolerate drastic changes in abiotic factors such as temperature, hydration, and light radiation; however, genomic information on the evolutionary aspect and mechanism of EPA enrichment in B. fuscopurpurea and the role of EPA in cold tolerance in this species remain elusive. We conducted transcriptome profile analysis in B. fuscopurpurea to investigate the biological functions of genes associated with resistance to various environment factors. We identified 41,935 unigenes that were assembled and applied to public databases to define their functional annotation (NR, GO, KEGG, KOG, and SwissProt). We further identified genes that encoded key enzymes in EPA biosynthesis; five paralogous genes encoding delta5 desaturase were detected in B. fuscopurpurea. Fatty acid profiling and gene expression analysis of B. fuscopurpurea grown under cold stress were simultaneously performed. The EPA content was increased by 29.8% in the samples grown at 4°C, while the total amount of fatty acids remained unchanged. Moreover, all the EPA biosynthesis-related desaturase and elongase genes were upregulated under cold stress. Thus, we hypothesized that diverse EPA biosynthesis pathways and significant increase in gene copy numbers of fatty acid desaturases, together with the concomitant elevation in the transcriptional level of genes associated with fatty acid metabolism, lead to EPA accumulation and subsequently affect membrane fluidity, contributing to cold stress resistance in B. fuscopurpurea. Our findings not only provide a fundamental genetic background for further research in B. fuscopurpurea, but also have important implications for screening and genetic engineering of algae and plants for EPA production.
[Mh] Termos MeSH primário: Temperatura Baixa
Ácido Eicosapentaenoico/biossíntese
Metabolômica
Alga Marinha/fisiologia
Transcriptoma
[Mh] Termos MeSH secundário: Ácidos Graxos/metabolismo
Genes de Plantas
Filogenia
Alga Marinha/genética
Alga Marinha/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fatty Acids); AAN7QOV9EA (Eicosapentaenoic Acid)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171215
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0186986


  7 / 2306 MEDLINE  
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[PMID]:29220368
[Au] Autor:Rubin SP; Miller IM; Foley MM; Berry HD; Duda JJ; Hudson B; Elder NE; Beirne MM; Warrick JA; McHenry ML; Stevens AW; Eidam EF; Ogston AS; Gelfenbaum G; Pedersen R
[Ad] Endereço:U.S. Geological Survey, Western Fisheries Research Center, Seattle, Washington, United States of America.
[Ti] Título:Increased sediment load during a large-scale dam removal changes nearshore subtidal communities.
[So] Source:PLoS One;12(12):e0187742, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The coastal marine ecosystem near the Elwha River was altered by a massive sediment influx-over 10 million tonnes-during the staged three-year removal of two hydropower dams. We used time series of bathymetry, substrate grain size, remotely sensed turbidity, scuba dive surveys, and towed video observations collected before and during dam removal to assess responses of the nearshore subtidal community (3 m to 17 m depth). Biological changes were primarily driven by sediment deposition and elevated suspended sediment concentrations. Macroalgae, predominantly kelp and foliose red algae, were abundant before dam removal with combined cover levels greater than 50%. Where persistent sediment deposits formed, macroalgae decreased greatly or were eliminated. In areas lacking deposition, macroalgae cover decreased inversely to suspended sediment concentration, suggesting impacts from light reduction or scour. Densities of most invertebrate and fish taxa decreased in areas with persistent sediment deposition; however, bivalve densities increased where mud deposited over sand, and flatfish and Pacific sand lance densities increased where sand deposited over gravel. In areas without sediment deposition, most invertebrate and fish taxa were unaffected by increased suspended sediment or the loss of algae cover associated with it; however, densities of tubeworms and flatfish, and primary cover of sessile invertebrates increased suggesting benefits of increased particulate matter or relaxed competition with macroalgae for space. As dam removal neared completion, we saw evidence of macroalgal recovery that likely owed to water column clearing, indicating that long-term recovery from dam removal effects may be starting. Our results are relevant to future dam removal projects in coastal areas and more generally to understanding effects of increased sedimentation on nearshore subtidal benthic communities.
[Mh] Termos MeSH primário: Ecossistema
Sedimentos Geológicos
[Mh] Termos MeSH secundário: Animais
Biodiversidade
Peixes/classificação
Invertebrados/classificação
Rios
Água do Mar
Alga Marinha
Washington
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171229
[Lr] Data última revisão:
171229
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171209
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0187742


  8 / 2306 MEDLINE  
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[PMID]:29206887
[Au] Autor:Ordoñez A; Kennedy EV; Diaz-Pulido G
[Ad] Endereço:Griffith School of Environment and Australian Rivers Institute-Coast & Estuaries, Nathan Campus, Griffith University, Brisbane, Queensland, Australia.
[Ti] Título:Reduced spore germination explains sensitivity of reef-building algae to climate change stressors.
[So] Source:PLoS One;12(12):e0189122, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Reduced seawater pH and changes in carbonate chemistry associated with ocean acidification (OA) decrease the recruitment of crustose coralline algae (CCAcf.), an important coral-reef builder. However, it is unclear whether the observed decline in recruitment is driven by impairment of spore germination, or post-settlement processes (e.g. space competition). To address this, we conducted an experiment using a dominant CCA, Porolithon cf. onkodes to test the independent and combined effects of OA, warming, and irradiance on its germination success and early development. Elevated CO2 negatively affected several processes of spore germination, including formation of the germination disc, initial growth, and germling survival. The magnitude of these effects varied depending on the levels of temperature and irradiance. For example, the combination of high CO2 and high temperature reduced formation of the germination disc, but this effect was independent of irradiance levels, while spore abnormalities increased under high CO2 and high temperature particularly in combination with low irradiance intensity. This study demonstrates that spore germination of CCA is impacted by the independent and interactive effects of OA, increasing seawater temperature and irradiance intensity. For the first time, this provides a mechanism for how the sensitivity of critical early life history processes to global change may drive declines of adult populations of key marine calcifiers.
[Mh] Termos MeSH primário: Mudança Climática
Recifes de Corais
Germinação
Alga Marinha/fisiologia
Esporos/crescimento & desenvolvimento
Estresse Fisiológico
[Mh] Termos MeSH secundário: Dióxido de Carbono/metabolismo
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
142M471B3J (Carbon Dioxide)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171229
[Lr] Data última revisão:
171229
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171206
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189122


  9 / 2306 MEDLINE  
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[PMID]:28457557
[Au] Autor:Mwaura J; Umezawa Y; Nakamura T; Kamau J
[Ad] Endereço:Kenya Marine and Fisheries Research Institute, P.O. Box 81651-80100, Kenya; Faculty of Fisheries, Nagasaki University, 1-14 Bunkyo, Nagasaki 852-8521, Japan. Electronic address: jmwaura@kmfri.co.ke.
[Ti] Título:Evidence of chronic anthropogenic nutrient within coastal lagoon reefs adjacent to urban and tourism centers, Kenya: A stable isotope approach.
[So] Source:Mar Pollut Bull;119(2):74-86, 2017 Jun 30.
[Is] ISSN:1879-3363
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The source of anthropogenic nutrient and its spatial extent in three fringing reefs with differing human population gradients in Kenya were investigated using stable isotope approaches. Nutrient concentrations and nitrate-δ N in seepage water indicated that population density and tourism contributed greatly to the extent of nutrient loading to adjacent reefs. Although water-column nutrient analyses did not show any significant difference among the reefs, higher δ N and N contents in macrophytes showed terrestrial nutrients affected primary producers in onshore areas in Nyali and Bamburi reefs, but were mitigated by offshore water intrusion especially at Nyali. On the offshore reef flat, where the same species of macroalgae were not available, complementary use of δ N in sedimentary organic matter suggested inputs of nutrients originated from the urban city of Mombasa. If population increases in the future, nutrient conditions in the shallower reef, Vipingo, may be dramatically degraded due to lower water exchange ratio.
[Mh] Termos MeSH primário: Recifes de Corais
Isótopos de Nitrogênio/análise
[Mh] Termos MeSH secundário: Ecossistema
Seres Humanos
Isótopos
Quênia
Recreação
Alga Marinha
Viagem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Isotopes); 0 (Nitrogen Isotopes)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171220
[Lr] Data última revisão:
171220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE


  10 / 2306 MEDLINE  
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[PMID]:28455807
[Au] Autor:Sunwoo IY; Kwon JE; Nguyen TH; Ra CH; Jeong GT; Kim SK
[Ad] Endereço:Department of Biotechnology, Pukyong National University, Busan, 48513, South Korea.
[Ti] Título:Bioethanol Production Using Waste Seaweed Obtained from Gwangalli Beach, Busan, Korea by Co-culture of Yeasts with Adaptive Evolution.
[So] Source:Appl Biochem Biotechnol;183(3):966-979, 2017 Nov.
[Is] ISSN:1559-0291
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Conditions for ethanol production were evaluated using waste seaweed obtained from Gwangalli beach, Busan, Korea, after strong winds on January 15, 2015. Eleven types of seaweed were identified, and the proportions of red, brown, and green seaweed wastes were 26, 46, and 28%, respectively. Optimal pretreatment conditions were determined as 8% slurry content, 286 mM H SO for 90 min at 121 °C. Enzymatic saccharification with 16 units/mL Celluclast 1.5L and Viscozyme L mixture at 45 °C for 48 h was carried out as optimal condition. A maximum monosaccharide concentration of 30.2 g/L was obtained and used to produce ethanol. Fermentation was performed with single or mixed yeasts of non-adapted and adapted Saccharomyces cerevisiae KCTC 1126 and Pichia angophorae KCTC 17574 to galactose and mannitol, respectively. The maximum ethanol concentration and yield of 13.5 g/L and Y of 0.45 were obtained using co-culture of adapted S. cerevisiae and P. angophorae.
[Mh] Termos MeSH primário: Adaptação Fisiológica
Biocombustíveis/microbiologia
Etanol/metabolismo
Pichia/metabolismo
Saccharomyces cerevisiae/metabolismo
Alga Marinha/química
Resíduos
[Mh] Termos MeSH secundário: Biotecnologia
Técnicas de Cocultura
Evolução Molecular
Fermentação
Hidrólise
Monossacarídeos/metabolismo
Pichia/crescimento & desenvolvimento
Pichia/fisiologia
República da Coreia
Saccharomyces cerevisiae/crescimento & desenvolvimento
Saccharomyces cerevisiae/fisiologia
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biofuels); 0 (Monosaccharides); 0 (Waste Products); 3K9958V90M (Ethanol)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171128
[Lr] Data última revisão:
171128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170430
[St] Status:MEDLINE
[do] DOI:10.1007/s12010-017-2476-6



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