Base de dados : MEDLINE
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[PMID]:28967570
[Au] Autor:Welden NA; Wolseley PA; Ashmore MR
[Ad] Endereço:Stockholm Environment Institute, University of York, UK; Open University, Milton Keynes, UK.
[Ti] Título:Citizen science identifies the effects of nitrogen deposition, climate and tree species on epiphytic lichens across the UK.
[So] Source:Environ Pollut;232:80-89, 2018 Jan.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A national citizen survey quantified the abundance of epiphytic lichens that are known to be either sensitive or tolerant to nitrogen (N) deposition. Records were collected across the UK from over 10,000 individual trees of 22 deciduous species. Mean abundance of tolerant and sensitive lichens was related to mean N deposition rates and climatic variables at a 5 km scale, and the response of lichens was compared on the three most common trees (Quercus, Fraxinus and Acer) and by assigning all 22 tree species to three bark pH groups. The abundance of N-sensitive lichens on trunks decreased with increasing total N deposition, while that of N-tolerant lichens increased. The abundance of N-sensitive lichens on trunks was reduced close to a busy road, while the abundance of N-tolerant lichens increased. The abundance of N-tolerant lichen species on trunks was lower on Quercus and other low bark pH species, but the abundance of N-sensitive lichens was similar on different tree species. Lichen abundance relationships with total N deposition did not differ between tree species or bark pH groups. The response of N-sensitive lichens to reduced nitrogen was greater than to oxidised N, and the response of N-tolerant lichens was greater to oxidised N than to reduced N. There were differences in the response of N-sensitive and N-tolerant lichens to rainfall, humidity and temperature. Relationships with N deposition and climatic variables were similar for lichen presence on twigs as for lichen abundance on trunks, but N-sensitive lichens increased, rather than decreased, on twigs of Quercus/low bark pH species. The results demonstrate the unique power of citizen science to detect and quantify the air pollution impacts over a wide geographical range, and specifically to contribute to understanding of lichen responses to different chemical forms of N deposition, local pollution sources and bark chemistry.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/análise
Monitoramento Ambiental/métodos
Líquens/química
Nitrogênio/análise
[Mh] Termos MeSH secundário: Acer
Poluição do Ar/estatística & dados numéricos
Poluição Ambiental
Líquens/fisiologia
Quercus
Árvores
Reino Unido
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants); N762921K75 (Nitrogen)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180208
[Lr] Data última revisão:
180208
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171003
[St] Status:MEDLINE


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[PMID]:28840799
[Au] Autor:Lee SD
[Ad] Endereço:Faculty of Science Education, Jeju National University, Jeju 63243, Republic of Korea.
[Ti] Título:Pigmentiphaga aceris sp. nov., isolated from tree sap.
[So] Source:Int J Syst Evol Microbiol;67(9):3198-3202, 2017 Sep.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Two Gram-stain-negative bacterial strains, SAP-32T and SAP-36, were isolated from sap drawn from the Acer pictum from Mount Halla in Jeju, Republic of Korea. The organisms were strictly aerobic, non-sporulating, motile rods and showed growth at 10-30 °C, pH 7-8 and with 0-2 % NaCl. The major isoprenoid quinone was Q-8. The predominant fatty acids were C16 : 0, cyclo-C17 : 0, summed feature 3 and C18 : 0. The polar lipids contained phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, an unknown aminophosphoglycolipid, an unknown glycolipid, an unknown phospholipid and two unknown lipids. The DNA G+C content was 64.4 mol%. The results of phylogenetic analyses based on 16S rRNA gene sequences indicated that SAP-32T and SAP-36 formed a distinct cluster with members of the genus Pigmentiphaga within the family Alcaligenaceae. Both strains showed 16S rRNA gene sequence similarity of 100 % to each other. The closest relatives of the isolates were Pigmentiphaga daeguensis (97.08 % sequence similarity), Pigmentiphaga kullae (97.01 %) and Pigmentiphaga litoralis (96.73 %). On the basis of data from phenotypic, chemotaxonomic and phylogenetic analyses, SAP-32T (=KCTC 52619T=DSM 104039T) and SAP-36 (=KCTC 52620=DSM 104072) represent members of a novel species of the genus Pigmentiphaga, for which the name Pigmentiphaga aceris sp. nov. is proposed.
[Mh] Termos MeSH primário: Acer/microbiologia
Alcaligenaceae/classificação
Filogenia
[Mh] Termos MeSH secundário: Alcaligenaceae/genética
Alcaligenaceae/isolamento & purificação
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Fosfolipídeos/química
RNA Ribossômico 16S/genética
República da Coreia
Análise de Sequência de DNA
Ubiquinona/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phospholipids); 0 (RNA, Ribosomal, 16S); 1339-63-5 (Ubiquinone); CQA993F7P8 (ubiquinone 8)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170920
[Lr] Data última revisão:
170920
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170826
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002073


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[PMID]:28727772
[Au] Autor:Hull-Sanders H; Pepper E; Davis K; Trotter RT
[Ad] Endereço:United States Department of Agriculture, Center for Plant Health Science and Technology, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, Otis Lab, United States of America.
[Ti] Título:Description of an establishment event by the invasive Asian longhorned beetle (Anoplophora glabripennis) in a suburban landscape in the northeastern United States.
[So] Source:PLoS One;12(7):e0181655, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The establishment of non-native species is commonly described as occurring in three phases: arrival, establishment, and dispersal. Both arrival and dispersal by the Asian longhorned beetle (Anoplophora glabripennis Motschulsky), a xylophagous Cerambycid native to China and the Korean peninsula, has been documented for multiple locations in both North America and Europe, however the transitional phase, establishment, is not well understood for this species due to the need to rapidly remove populations to prevent dispersal and assist eradication, and the evident variation in the behavior of populations. Here we describe the dynamics of an establishment event for the Asian longhorned beetle in a small, isolated population within the regulated quarantine zone near Worcester, Massachusetts, USA. These data were collected during an opportunity afforded by logistical limits on the Cooperative Asian Longhorned Beetle Eradication Program administered by state, federal, and local government partners. Seventy-one infested red maple (Acer rubrum) trees and 456 interspersed un-infested trees were surveyed in an isolated, recently established population within a ~0.29 ha stand in a suburban wetland conservation area in which nearly 90% of the trees were host species, and nearly 80% were Acer rubrum. Tree-ring analyses show that within this establishing population, Asian longhorned beetles initially infested one or two A. rubrum, before moving through the stand to infest additional A. rubrum based not on distance or direction, but on tree size, with infestation biased towards trees with larger trunk diameters. Survey data from the larger landscape suggest this population may have generated long-distance dispersers (~1400 m), and that these dispersal events occurred before the originally infested host trees were fully exploited by the beetle. The distribution and intensity of damage documented in this population suggest dispersal here may have been spatially more rapid and diffuse than in other documented infestations. Dispersal at these larger spatial scales also implies that when beetles move beyond the closed canopy of the stand, the direction of dispersal may be linked to prevailing winds.
[Mh] Termos MeSH primário: Cidades
Coleópteros
Espécies Introduzidas
[Mh] Termos MeSH secundário: Acer/parasitologia
Distribuição Animal
Animais
Massachusetts
Vento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170721
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0181655


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[PMID]:28494583
[Au] Autor:Liu Y; Rose KN; DaSilva NA; Johnson SL; Seeram NP
[Ad] Endereço:Bioactive Botanical Research Laboratory, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island , 7 Greenhouse Road, Kingston, Rhode Island 02881, United States.
[Ti] Título:Isolation, Identification, and Biological Evaluation of Phenolic Compounds from a Traditional North American Confectionery, Maple Sugar.
[So] Source:J Agric Food Chem;65(21):4289-4295, 2017 May 31.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Maple sap, collected from the sugar maple (Acer saccharum) tree, is boiled to produce the popular plant-derived sweetener, maple syrup, which can then be further evaporated to yield a traditional North American confectionery, maple sugar. Although maple sap and maple syrup have been previously studied, the phytochemical constituents of maple sugar are unknown. Herein, 30 phenolic compounds, 1-30, primarily lignans, were isolated and identified (by HRESIMS and NMR) from maple sugar. The isolates included the phenylpropanoid-based lignan tetramers (erythro,erythro)-4″,4‴-dihydroxy-3,3',3″,3‴,5,5'-hexamethoxy-7,9';7',9-diepoxy-4,8″;4',8‴-bisoxy-8,8'-dineolignan-7″,7‴,9″,9‴-tetraol, 29, and (threo,erythro)-4″,4‴-dihydroxy-3,3',3″,3‴,5,5'-hexamethoxy-7,9';7',9-diepoxy-4,8″;4',8‴-bisoxy-8,8'-dineolignan-7″,7‴,9″,9‴-tetraol, 30, neither of which have been identified from maple sap or maple syrup before. Twenty of the isolates (selected on the basis of sample quantity available) were evaluated for their potential biological effects against lipopolysaccharide-induced inflammation in BV-2 microglia in vitro and juglone-induced oxidative stress in Caenorhabditis elegans in vivo. The current study increases scientific knowledge of possible bioactive compounds present in maple-derived foods including maple sugar.
[Mh] Termos MeSH primário: Acer/química
Fenóis/química
Fenóis/farmacologia
Extratos Vegetais/química
Extratos Vegetais/farmacologia
Edulcorantes/química
Edulcorantes/farmacologia
[Mh] Termos MeSH secundário: Animais
Caenorhabditis elegans/efeitos dos fármacos
Caenorhabditis elegans/metabolismo
Microglia/efeitos dos fármacos
Microglia/imunologia
Estrutura Molecular
Estresse Oxidativo/efeitos dos fármacos
Fenóis/isolamento & purificação
Extratos Vegetais/isolamento & purificação
Edulcorantes/isolamento & purificação
Estados Unidos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Phenols); 0 (Plant Extracts); 0 (Sweetening Agents)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170608
[Lr] Data última revisão:
170608
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170513
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b01969


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[PMID]:28431762
[Au] Autor:Stoler AB; Mattes BM; Hintz WD; Jones DK; Lind L; Schuler MS; Relyea RA
[Ad] Endereço:Darrin Fresh Water Institute, Rensselaer Polytechnic Institute, Troy, NY 12180, USA. Electronic address: abstoler@gmail.com.
[Ti] Título:Effects of a common insecticide on wetland communities with varying quality of leaf litter inputs.
[So] Source:Environ Pollut;226:452-462, 2017 Jul.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Chemical contamination of aquatic systems often co-occurs with dramatic changes in surrounding terrestrial vegetation. Plant leaf litter serves as a crucial resource input to many freshwater systems, and changes in litter species composition can alter the attributes of freshwater communities. However, little is known how variation in litter inputs interacts with chemical contaminants. We investigated the ecological effects resulting from changes in tree leaf litter inputs to freshwater communities, and how those changes might interact with the timing of insecticide contamination. Using the common insecticide malathion, we hypothesized that inputs of nutrient-rich and labile leaf litter (e.g., elm [Ulmus spp.] or maple [Acer spp.]) would reduce the negative effects of insecticides on wetland communities relative to inputs of recalcitrant litter (e.g., oak [Quercus spp.]). We exposed artificial wetland communities to a factorial combination of three litter species treatments (elm, maple, and oak) and four insecticide treatments (no insecticide, small weekly doses of 10 µg L , and either early or late large doses of 50 µg L ). Communities consisted of microbes, algae, snails, amphipods, zooplankton, and two species of tadpoles. After two months, we found that maple and elm litter generally induced greater primary and secondary production. Insecticides induced a reduction in the abundance of amphipods and some zooplankton species, and increased phytoplankton. In addition, we found interactive effects of litter species and insecticide treatments on amphibian responses, although specific effects depended on application regime. Specifically, with the addition of insecticide, elm and maple litter induced a reduction in gray tree frog survival, oak and elm litter delayed tree frog metamorphosis, and oak and maple litter reduced green frog tadpole mass. Our results suggest that attention to local forest composition, as well as the timing of pesticide application might help ameliorate the harmful effects of pesticides observed in freshwater systems.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Inseticidas/análise
Zonas Úmidas
[Mh] Termos MeSH secundário: Acer/efeitos dos fármacos
Animais
Anuros
Ecologia
Ecossistema
Água Doce
Larva/efeitos dos fármacos
Malation/toxicidade
Fitoplâncton/efeitos dos fármacos
Folhas de Planta/química
Plantas/efeitos dos fármacos
Quercus/efeitos dos fármacos
Zooplâncton/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Insecticides); U5N7SU872W (Malathion)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170706
[Lr] Data última revisão:
170706
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170423
[St] Status:MEDLINE


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[PMID]:28346534
[Au] Autor:Park CK; Ho CH; Jeong SJ; Lee EJ; Kim J
[Ad] Endereço:School of Earth and Environmental Sciences, Seoul National University, Seoul, Republic of Korea.
[Ti] Título:Spatial and temporal changes in leaf coloring date of Acer palmatum and Ginkgo biloba in response to temperature increases in South Korea.
[So] Source:PLoS One;12(3):e0174390, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Understanding shifts in autumn phenology associated with climate changes is critical for preserving forest ecosystems. This study examines the changes in the leaf coloring date (LCD) of two temperate deciduous tree species, Acer palmatum (Acer) and Ginkgo biloba (Ginkgo), in response to surface air temperature (Ts) changes at 54 stations of South Korea for the period 1989-2007. The variations of Acer and Ginkgo in South Korea are very similar: they show the same mean LCD of 295th day of the year and delays of about 0.45 days year-1 during the observation period. The delaying trend is closely correlated (correlation coefficient > 0.77) with increases in Ts in mid-autumn by 2.8 days °C-1. It is noted that the LCD delaying and temperature sensitivity (days °C-1) for both tree species show negligible dependences on latitudes and elevations. Given the significant LCD-Ts relation, we project LCD changes for 2016-35 and 2046-65 using a process-based model forced by temperature from climate model simulation. The projections indicate that the mean LCD would be further delayed by 3.2 (3.7) days in 2016-35 (2046-65) due to mid-autumn Ts increases. This study suggests that the mid-autumn warming is largely responsible for the observed LCD changes in South Korea and will intensify the delaying trends in the future.
[Mh] Termos MeSH primário: Acer/fisiologia
Cor
Ginkgo biloba/fisiologia
Folhas de Planta/fisiologia
Estações do Ano
Temperatura Ambiente
[Mh] Termos MeSH secundário: Mudança Climática
Ecossistema
Modelos Teóricos
República da Coreia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170828
[Lr] Data última revisão:
170828
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170328
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0174390


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[PMID]:28296180
[Au] Autor:Meda NR; Poubelle PE; Stevanovic T
[Ad] Endereço:Département des Sciences du Bois et de la Forêt, Faculté de Foresterie et Géomatique, Centre de Recherche sur les Matériaux Renouvelables (CRMR), Université Laval, 2425 rue de la Terrasse, Pavillon G-H Kruger, Québec, QC, G1V 0A6, Canada.
[Ti] Título:Antioxidant Capacity, Phenolic Constituents and Toxicity of Hot Water Extract from Red Maple Buds.
[So] Source:Chem Biodivers;14(6), 2017 Jun.
[Is] ISSN:1612-1880
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:The present study reports, for the first time, the results of the antioxidant capacity and the phenolic composition of a hot water extract from red maple buds (RMB), as well as its safety. In this regard and comparatively to antioxidant standards, this extract exhibits a significant antiradical capacity when tested by 2,2-diphenyl-1-picrylhydrazyl (DPPH ) and anion superoxide trapping assays. High-resolution mass spectrometric and nuclear magnetic resonance analyses permitted to determine for the first time, in red maple species, cyanidin-3-O-glucoside, quercetin-3-O-galactoside, quercetin-3-O-arabinoside, and quercetin. Also, the quantification of individual phenolics by high-performance liquid chromatography method revealed that ginnalin A at 117.0 mg/g is the major compound of RMB hot water extract. Finally, using flow cytometry evaluation, the extract of RMB was determined to have no toxicity neither to cause significant modification of apoptosis process, up to concentration of 100 µg/ml, on human peripheral blood neutrophils. These results allow anticipating various fields of application of RMB water extract.
[Mh] Termos MeSH primário: Acer/química
Antioxidantes/isolamento & purificação
Técnicas de Química Analítica/métodos
Fenóis/análise
Extratos Vegetais/farmacologia
[Mh] Termos MeSH secundário: Acer/toxicidade
Antioxidantes/farmacologia
Apoptose/efeitos dos fármacos
Células Sanguíneas
Células Cultivadas
Desoxiglucose/análogos & derivados
Desoxiglucose/análise
Ácido Gálico/análogos & derivados
Ácido Gálico/análise
Seres Humanos
Neutrófilos/efeitos dos fármacos
Quercetina/análogos & derivados
Quercetina/análise
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Phenols); 0 (Plant Extracts); 0 (ginnalin A); 059QF0KO0R (Water); 632XD903SP (Gallic Acid); 9G2MP84A8W (Deoxyglucose); 9IKM0I5T1E (Quercetin)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170822
[Lr] Data última revisão:
170822
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170316
[St] Status:MEDLINE
[do] DOI:10.1002/cbdv.201700028


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[PMID]:28283753
[Au] Autor:Ma H; Xu J; DaSilva NA; Wang L; Wei Z; Guo L; Johnson SL; Lu W; Xu J; Gu Q; Seeram NP
[Ad] Endereço:Bioactive Botanical Research Laboratory, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI, 02881, USA. hang_ma@uri.edu.
[Ti] Título:Cosmetic applications of glucitol-core containing gallotannins from a proprietary phenolic-enriched red maple (Acer rubrum) leaves extract: inhibition of melanogenesis via down-regulation of tyrosinase and melanogenic gene expression in B16F10 melanoma cells.
[So] Source:Arch Dermatol Res;309(4):265-274, 2017 May.
[Is] ISSN:1432-069X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The red maple (Acer rubrum) is a rich source of phenolic compounds which possess galloyl groups attached to different positions of a 1,5-anhydro-D-glucitol core. While these glucitol-core containing gallotannins (GCGs) have reported anti-oxidant and anti-glycative effects, they have not yet been evaluated for their cosmetic applications. Herein, the anti-tyrosinase and anti-melanogenic effects of a proprietary phenolic-enriched red maple leaves extract [Maplifa ; contains ca. 45% ginnalin A (GA) along with other GCGs] were investigated using enzyme and cellular assays. The GCGs showed anti-tyrosinase activity with IC values ranging from 101.4 to 1047.3 µM and their mechanism of tyrosinase inhibition (using GA as a representative GCG) was evaluated by chelating and computational/modeling studies. GA reduced melanin content in murine melanoma B16F10 cells by 79.1 and 56.7% (at non-toxic concentrations of 25 and 50 µM, respectively), and its mechanisms of anti-melanogenic effects were evaluated by using methods including fluorescent probe (DCF-DA), real-time PCR, and western blot experiments. These data indicated that GA was able to: (1) reduce the levels of reactive oxygen species, (2) down-regulate the expression of MITF, TYR, TRP-1, and TRP-2 gene levels in a time-dependent manner, and (3) significantly reduce protein expression of the TRP-2 gene. Therefore, the anti-melanogenic effects of red maple GCGs warrant further investigation of this proprietary natural product extract for potential cosmetic applications.
[Mh] Termos MeSH primário: Acer/imunologia
Taninos Hidrolisáveis/uso terapêutico
Oxirredutases Intramoleculares/metabolismo
Melanócitos/efeitos dos fármacos
Extratos Vegetais/uso terapêutico
Neoplasias Cutâneas/tratamento farmacológico
Sorbitol/uso terapêutico
[Mh] Termos MeSH secundário: Animais
Proliferação Celular/efeitos dos fármacos
Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos
Seres Humanos
Taninos Hidrolisáveis/química
Oxirredutases Intramoleculares/genética
Melaninas/metabolismo
Melanócitos/fisiologia
Melanoma Experimental
Camundongos
Fenóis/química
Extratos Vegetais/química
Folhas de Planta
Sorbitol/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrolyzable Tannins); 0 (Melanins); 0 (Phenols); 0 (Plant Extracts); 506T60A25R (Sorbitol); EC 5.3.- (Intramolecular Oxidoreductases); EC 5.3.3.12 (dopachrome isomerase)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170421
[Lr] Data última revisão:
170421
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170312
[St] Status:MEDLINE
[do] DOI:10.1007/s00403-017-1728-1


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[PMID]:28283243
[Au] Autor:Iwadate T; Nihei KI
[Ad] Endereço:Department of Applied Life Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan.
[Ti] Título:Chemical synthesis, redox transformation, and identification of sonnerphenolic C, an antioxidant in Acer nikoense.
[So] Source:Bioorg Med Chem Lett;27(8):1799-1802, 2017 04 15.
[Is] ISSN:1464-3405
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Sonnerphenolic C (3), which was predicted in a redox product of epirhododendrin (1) isolated from Acer nikoense, was synthesized for the first time via the epimeric separation of benzylidene acetal intermediates as a key step. From a similar synthetic route, 1 was obtained concisely. As a result of their antioxidative evaluation, only 3 revealed potent activity. The redox transformation of 1 into 3 was achieved in the presence of tyrosinase and vitamin C. Moreover, 3 was identified in the decoction of A. nikoense by HPLC analysis with the effective use of synthesized 3. Thus, a novel naturally occurring antioxidant 3 was developed through the sequential flow including redox prediction, chemical synthesis, evaluation of the activity, and identification as the natural product.
[Mh] Termos MeSH primário: Acer/química
Antioxidantes/síntese química
Antioxidantes/farmacologia
Catecóis/síntese química
Catecóis/farmacologia
Glucosídeos/síntese química
Glucosídeos/farmacologia
Extratos Vegetais/química
[Mh] Termos MeSH secundário: Antioxidantes/isolamento & purificação
Ácido Ascórbico/farmacologia
Compostos de Bifenilo/química
Catecóis/isolamento & purificação
Glucosídeos/isolamento & purificação
Oxirredução
Picratos/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antioxidants); 0 (Biphenyl Compounds); 0 (Catechols); 0 (Glucosides); 0 (Picrates); 0 (Plant Extracts); 0 (sonnerphenolic C); DFD3H4VGDH (1,1-diphenyl-2-picrylhydrazyl); PQ6CK8PD0R (Ascorbic Acid)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:171124
[Lr] Data última revisão:
171124
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170312
[St] Status:MEDLINE


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[PMID]:28234921
[Au] Autor:Razaq M; Zhang P; Shen HL; Salahuddin
[Ad] Endereço:School of Forestry, Northeast Forest University, Harbin, China.
[Ti] Título:Influence of nitrogen and phosphorous on the growth and root morphology of Acer mono.
[So] Source:PLoS One;12(2):e0171321, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Nitrogen and phosphorous are critical determinants of plant growth and productivity, and both plant growth and root morphology are important parameters for evaluating the effects of supplied nutrients. Previous work has shown that the growth of Acer mono seedlings is retarded under nursery conditions; we applied different levels of N (0, 5, 10, and 15 g plant-1) and P (0, 4, 6 and 8 g plant-1) fertilizer to investigate the effects of fertilization on the growth and root morphology of four-year-old seedlings in the field. Our results indicated that both N and P application significantly affected plant height, root collar diameter, chlorophyll content, and root morphology. Among the nutrient levels, 10 g N and 8 g P were found to yield maximum growth, and the maximum values of plant height, root collar diameter, chlorophyll content, and root morphology were obtained when 10 g N and 8 g P were used together. Therefore, the present study demonstrates that optimum levels of N and P can be used to improve seedling health and growth during the nursery period.
[Mh] Termos MeSH primário: Acer/crescimento & desenvolvimento
Raízes de Plantas/crescimento & desenvolvimento
Plântulas/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Acer/metabolismo
Clorofila/metabolismo
Fertilizantes
Nitrogênio/química
Fósforo/química
Raízes de Plantas/metabolismo
Plântulas/metabolismo
Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fertilizers); 0 (Soil); 1406-65-1 (Chlorophyll); 27YLU75U4W (Phosphorus); N762921K75 (Nitrogen)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170225
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0171321



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