Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.859.937.844 [Categoria DeCS]
Referências encontradas : 60 [refinar]
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  1 / 60 MEDLINE  
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PMID:29214539
Autor:Barroso PJ; Martín J; Santos JL; Aparicio I; Alonso E
Endereço:Department of Analytical Chemistry, Escuela Politécnica Superior, University of Seville, C/ Virgen de África 7, 41011, Seville, Spain.
Título:Analytical method for the evaluation of the outdoor air contamination by emerging pollutants using tree leaves as bioindicators.
Fonte:Anal Bioanal Chem; 410(2):417-428, 2018 Jan.
ISSN:1618-2650
País de publicação:Germany
Idioma:eng
Resumo:In this work, an analytical method, based on sonication-assisted extraction, clean-up by dispersive solid-phase extraction and determination by liquid chromatography-tandem mass spectrometry, has been developed and validated for the simultaneous determination of 15 emerging pollutants in leaves from four ornamental tree species. Target compounds include perfluorinated organic compounds, plasticizers, surfactants, brominated flame retardant, and preservatives. The method was optimized using Box-Behnken statistical experimental design with response surface methodology and validated in terms of recovery, accuracy, precision, and method detection and quantification limits. Quantification of target compounds was carried out using matrix-matched calibration curves. The highest recoveries were achieved for the perfluorinated organic compounds (mean values up to 87%) and preservatives (up to 88%). The lowest recoveries were achieved for plasticizers (51%) and brominated flame retardant (63%). Method detection and quantification limits were in the ranges 0.01-0.09 ng/g dry matter (dm) and 0.02-0.30 ng/g dm, respectively, for most of the target compounds. The method was successfully applied to the determination of the target compounds on leaves from four tree species used as urban ornamental trees (Citrus aurantium, Celtis australis, Platanus hispanica, and Jacaranda mimosifolia). Graphical abstract Analytical method for the biomonitorization of emerging pollutants in outdoor air.
Tipo de publicação: EVALUATION STUDIES; JOURNAL ARTICLE
Nome de substância:0 (Air Pollutants); 0 (Environmental Biomarkers); 0 (Flame Retardants); 0 (Fluorocarbons); 0 (Plasticizers); 0 (Surface-Active Agents)


  2 / 60 MEDLINE  
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PMID:27573437
Autor:Acquaviva R; Sorrenti V; Santangelo R; Cardile V; Tomasello B; Malfa G; Vanella L; Amodeo A; Genovese C; Mastrojeni S; Pugliese M; Ragusa M; Di Giacomo C
Endereço:Department of Drug Science, Biochemistry Section, University of Catania, I-95123 Catania, Italy.
Título:Effects of an extract of Celtis aetnensis (Tornab.) Strobl twigs on human colon cancer cell cultures.
Fonte:Oncol Rep; 36(4):2298-304, 2016 Oct.
ISSN:1791-2431
País de publicação:Greece
Idioma:eng
Resumo:Cancers of the digestive tract, in particular colorectal cancer (CRC), are among those most responsive to dietary modification. Research has shown that approximately 75% of all sporadic cases of CRC are directly influenced by diet. Many natural compounds have been investigated for their potential usefulness as cancer chemopreventive agents as they have been thought to suppress carcinogenesis mainly during the initiation phase due to their radical scavenger activity. Since there is an increasing interest in the in vivo protective effects of natural compounds contained in plants against oxidative damage involved in several human diseases such as cancer, the aim of the present research was to test the effects of a Celtis aetnensis (Tornab.) Strobl twig extract on a human colon carcinoma cell line (Caco2). In order to elucidate the mechanisms of action of this extract, LDH release, GSH content, ROS levels, caspase-3 and γ-GCS expression were also evaluated. The results revealed that the Celtis aetnensis extract reduced the cell viability of the Caco2 cells inducing apoptosis at the lowest concentration and necrosis at higher dosages. In addition, this extract caused an increase in the levels of ROS, a decrease in RSH levels and in the expression of HO-1. The expression of γ-GCS was not modified in the Celtis aetnensis-treated Caco-2 cells. These results suggest an interference of this extract on the oxidant/antioxidant cell balance with consequent cell damage. The present study supports the growing body of data suggesting the bioactivities of Celtis aetnensis (Tornab.) Strobl and its potential impact on cancer therapy and on human health.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Antioxidants); 0 (Neoplasm Proteins); 0 (Plant Extracts); 0 (Reactive Oxygen Species)


  3 / 60 MEDLINE  
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PMID:26910007
Autor:Liu HL; Zhang RQ; Geng ML; Zhu JY; An JC; Ma JL
Endereço:Guangxi Forestry Research Institute, Nanning, Guangxi, China.
Título:Chloroplast analysis of Zelkova schneideriana (Ulmaceae): genetic diversity, population structure, and conservation implications.
Fonte:Genet Mol Res; 15(1), 2016 Feb 22.
ISSN:1676-5680
País de publicação:Brazil
Idioma:eng
Resumo:Zelkova schneideriana is endemic to China and belongs to the Ulmaceae. It is listed as a Near Threatened species in the China Biodiversity Red Data Book. We conducted a phylogeographical study of two chloroplast regions (psbA-trnH and trnG-trnM) in several Chinese Z. schneideriana populations, in order to examine the genetic diversity, population structure, and evolutionary history of the species. In all, 10 haplotypes were detected. The population from Sangzhi, Hunan, had the highest nucleotide diversity (π = 0.00653) and haplotype diversity (HD = 1.000), and should be considered the most suitable population to be protected under an in situ conservation strategy. Seed collections from as many individuals as possible in other populations would preserve the genetic diversity of Z. schneideriana.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T


  4 / 60 MEDLINE  
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PMID:26662442
Autor:Li XH; Zhang XP; Liu K; Liu HJ; Shao JW
Endereço:College of Life Science, Anhui Normal University, Wuhu, China.
Título:Efficient development of polymorphic microsatellite loci for Pteroceltis tatarinowii (Ulmaceae).
Fonte:Genet Mol Res; 14(4):16444-9, 2015 Dec 09.
ISSN:1676-5680
País de publicação:Brazil
Idioma:eng
Resumo:Pteroceltis tatarinowii (Ulmaceae) is a scientifically and economically important temperate deciduous tree that is endemic to China. In the present study, 12 P. tatarinowii polymorphic microsatellite loci were developed using the tailed primer-M13-simple sequence repeats (TP-M13-SSR) biotin-capture method. The number of alleles per locus ranged from 2 to 10, with an average of 6.58. The observed and expected heterozygosity ranged from 0.208 to 0.958 and from 0.198 to 0.858, with average values of 0.703 and 0.710, respectively. The markers isolated in this study represent a favorable tool for further analyses of the population genetic structure and evolutionary history of this relic tree.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T


  5 / 60 MEDLINE  
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PMID:26246188
Autor:Guo JF; Li HS; Wang B; Xue XF; Hong XY
Endereço:Department of Entomology, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
Título:DNA barcoding reveals the protogyne and deutogyne of Tegolophus celtis sp. nov. (Acari: Eriophyidae).
Fonte:Exp Appl Acarol; 67(3):393-410, 2015 Nov.
ISSN:1572-9702
País de publicação:Netherlands
Idioma:eng
Resumo:A few eriophyoid mites have two forms of adult female, called protogyne and deutogyne. The latter form is thought to increase survival under unfavorable conditions. The two forms have distinct morphological characters, which often cause them to be recognized as different species. Molecular species delimitation provides a useful tool to solve these misunderstandings. Here we describe a new species of eriophyoid mite, Tegolophus celtis sp. nov., that has protogyne and deutogyne forms infesting Chinese hackberry, Celtis sinensis Pers. (Cannabaceae), an ornamental tree in China. The two forms can be easily differentiated by body shape (fusiform and triangular, respectively) and body color (light yellow and red, respectively). The putative protogyne and deutogyne forms of T. celtis were identified by using fragments of three genes, a mitochondrial gene (COI) and two nuclear genes (18S rRNA and 28S rRNA). Kimura-2-parameter distances of these three fragmental sequences were between 0.0% and 0.9%. Phylogenetic topologies strongly support the occurrence of the protogyne and deutogyne forms with high bootstrap and Bayesian values. The population structure of T. celtis changed with the seasons, with deutogynes being most abundant in summer and protogynes being most abundant in spring. The new species described herein are vagrants on their host plants.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nome de substância:0 (Arthropod Proteins); 0 (Mitochondrial Proteins); 0 (RNA, Ribosomal, 18S); 0 (RNA, Ribosomal, 28S); EC 1.9.3.1 (Electron Transport Complex IV)


  6 / 60 MEDLINE  
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PMID:26141513
Autor:Jia LB; Manchester SR; Su T; Xing YW; Chen WY; Huang YJ; Zhou ZK
Endereço:Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
Título:First occurrence of Cedrelospermum (Ulmaceae) in Asia and its biogeographic implications.
Fonte:J Plant Res; 128(5):747-61, 2015 Sep.
ISSN:1618-0860
País de publicação:Japan
Idioma:eng
Resumo:Cedrelospermum (Ulmaceae) is an extinct genus with extensive fossil records in Europe and North America. However, no fossil of the genus has been reported from Asia. Here we describe Cedrelospermum asiaticum L.B. Jia, Y.J. Huang et Z.K. Zhou sp. nov. based on compressed fruits from the late Miocene of Yunnan, southwestern China. The fossil fruits are characterized by an ovate fruit body adjoined by double wings, with the veins on the primary wing converging toward a stigmatic area. According to the historical geographic distribution of the genus, we hypothesize that Cedrelospermum originated in North America where both single-winged and double-winged fruits were reported. The single-winged form subsequently spread into Europe via the North Atlantic land bridge and the double-winged form dispersed into Asia via the Bering land bridge. From the Eocene to Oligocene, a southward retreat of the genus distribution probably took place, which coincided with the global surface cooling initiated during the Eocene-Oligocene transition. The extinction of Cedrelospermum from Asia may be related to the intensification of the East Asian monsoon.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T


  7 / 60 MEDLINE  
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PMID:25587154
Autor:Maharramova EH; Safarov HM; Kozlowski G; Borsch T; Muller LA
Endereço:Botanischer Garten und Botanisches Museum Berlin-Dahlem, Freie Universität Berlin, 14195 Berlin, Germany Institute of Botany, Azerbaijan National Academy of Sciences, AZ1073 Baku, Azerbaijan.
Título:Analysis of nuclear microsatellites reveals limited differentiation between Colchic and Hyrcanian populations of the wind-pollinated relict tree Zelkova carpinifolia (Ulmaceae).
Fonte:Am J Bot; 102(1):119-28, 2015 Jan.
ISSN:1537-2197
País de publicação:United States
Idioma:eng
Resumo:UNLABELLED: • PREMISE OF THE STUDY: The Caucasus represents one of the world's biodiversity hotspots and includes the climatic refugia Hyrcan on the southern coast of the Caspian Sea and Colchis on the eastern coast of the Black Sea, where different species survived during the Quaternary climatic oscillations. We evaluated the genetic diversity of the relict tree Zelkova carpinifolia shared between the two refugia and distributed throughout the Caucasus and adjacent areas.• METHODS: Specimens were collected from 30 geographical sites in Azerbaijan, Georgia, Iran, and Turkey and screened for variability at eight nuclear microsatellite loci. The genetic diversity among and within populations was assessed using a set of statistical measures.• KEY RESULTS: We detected 379 different genotypes from a total of 495 individuals with varying degrees of clonal reproduction at the different sites. Low to intermediate levels of genetic diversity were observed at all sites, and strong differentiation between sampling sites was absent. In addition, we observed no clear genetic differentiation between the Colchis and Hyrcan. Bayesian clustering of the genotypes revealed three populations with high levels of admixture between the sampling sites.• CONCLUSIONS: The lack of strong genetic structure of studied populations of Z. carpinifolia contrasts with a previous study based on chloroplast markers and suggests that long-distance pollen dispersal is an important factor of gene flow among populations of Z. carpinifolia. The present study does not reveal any particular site with particularly isolated genotypes that would deserve more attention for conservation purposes than others, although some sites should be considered for further investigation.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nome de substância:0 (DNA, Plant)


  8 / 60 MEDLINE  
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PMID:24657543
Autor:Allegrucci N; Bucsinszky AM; Arturi M; Cabello MN
Endereço:Instituto de Botánica Spegazzini, FCNyM, UNLP, 53 # 477, 1900 La Plata, Provincia de Buenos Aires, Argentina. Electronic address: nataliaallegrucii@yahoo.com.
Título:Communities of anamorphic fungi on green leaves and leaf litter of native forests of Scutia buxifolia and Celtis tala: Composition, diversity, seasonality and substrate specificity.
Fonte:Rev Iberoam Micol; 32(2):71-8, 2015 Apr-Jun.
ISSN:2173-9188
País de publicação:Spain
Idioma:eng
Resumo:BACKGROUND: Xeric forests dominated by two tree species, Scutia buxifolia (Rhamnaceae) and Celtis tala (Ulmacea), are temperate, semi-deciduous wooded communities that represent the most abundant woodlands on the eastern plains of Buenos Aires Province, Argentina. The district of Magdalena has one of the most well-preserved native-forest areas, with an environmental heterogeneity that gives rise to the wide variability in the vegetation present. AIMS: The aim of this study was to analyze the species composition, diversity, seasonal variations, and substrate specificity of anamorphic fungi (Ascomycota) on the green leaves and in the leaf litter of native forests dominated by Scutia buxifolia and Celtis tala from Magdalena, Buenos Aires, Argentina. METHODS: In order to obtain the mycobiota of decomposition, seasonal samples of green leaves and leaf litter from both types of trees were collected over a two-year period. In the laboratory, the leaves were placed in a moist chamber and incubated at room temperature. RESULTS: A total of 100 species of anamorphic Ascomycota were identified in both forests. No significant variations were observed in the richness, diversity, or evenness of the fungal communities of the green leaves and leaf litter of both forests between seasons. CONCLUSIONS: The species that characterized the fungal communities in the leaves of each of the trees were found to be different. The type of substrate had a stronger influence in determining the composition of the fungal community in both types of forests.
Tipo de publicação: COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nome de substância:0 (Soil)


  9 / 60 MEDLINE  
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PMID:25525112
Autor:Castro AV; Porrini DP; Cicchino AC
Endereço:Laboratorio de Artrópodos, GENEBSO-INBIOTEC-Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, 7600 Mar del Plata, Buenos Aires, Argentina adelamdp@gmail.com.
Título:Annual activity density of groundbeetles (Coleoptera: Carabidae) of a Celtis ehrenbergiana (Rosales: Celtidaceae) forest of Buenos Aires province, Argentina.
Fonte:J Insect Sci; 14, 2014.
ISSN:1536-2442
País de publicação:United States
Idioma:eng
Resumo:The aim of this study was to describe the annual activity cycle, the sex ratio, and the relationship between the weather variables and activity density of the 16 most abundant carabid species of a typical southeastern region of Pampasia, Argentina. The study focused on the southernmost Celtis ehrenbergiana (Klotzsch) Liebmann ( = C. tala Guillies ex Planch) native forest of the region, from March 2008 to March 2009, a period during which there was a marked draught associated with the La Niña phenomenon. Forty-five pitfall traps were emptied once every 2 wk, and the occurrence of larvae, tenerals, and subtenerals was recorded. Photoperiod, temperature, and precipitations explained 35% of the total variation in the catch. Total carabid activity was high in early autumn and late spring. Eight species reached their maximum activity in spring, five in winter, two in summer, and one in autumn. Possible reproductive strategies, the influence of different variables involved in the life cycles of the species, and the sex ratio and their limitations are discussed.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T


  10 / 60 MEDLINE  
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PMID:25501217
Autor:Liu HL; Zhang RQ; Geng ML; Zhu JY; Ma JL
Endereço:College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan, China.
Título:Isolation and characterization of polymorphic microsatellite loci from Zelkova schneideriana Hand.-Mazz.
Fonte:Genet Mol Res; 13(4):10062-6, 2014 Dec 03.
ISSN:1676-5680
País de publicação:Brazil
Idioma:eng
Resumo:Zelkova schneideriana is a highly valued hardwood species. An improved technique for isolating codominant compound microsatellite markers was used to develop simple sequence repeat markers for Z. schneideriana. A total of 12 microsatellite loci were identified. Overall, the number of alleles per locus ranged from 8-19, with an average of 11.75. Observed heterozygosity and expected heterozygosity values ranged from 0.109-0.709 and 0.832-0.929, respectively. Polymorphic information content is from 0.803-0.915, with an average of 0.854. These markers will be very important for future research related to the genetic diversity, population structure, patterns of gene flow, and mating system of this species.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nome de substância:0 (DNA Primers); 0 (DNA, Plant)



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