Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.401.984 [Categoria DeCS]
Referências encontradas : 29 [refinar]
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  1 / 29 MEDLINE  
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[PMID]:28466187
[Au] Autor:Li G; Hu S; Yang J; Schultz EA; Clarke K; Hou H
[Ad] Endereço:The State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan, 430072, Hubei, People's Republic of
[Ti] Título:Water-Wisteria as an ideal plant to study heterophylly in higher aquatic plants.
[So] Source:Plant Cell Rep;36(8):1225-1236, 2017 Aug.
[Is] ISSN:1432-203X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:KEY MESSAGE: The semi-aquatic plant Water-Wisteria is suggested as a new model to study heterophylly due to its many advantages and typical leaf phenotypic plasticity in response to environmental factors and phytohormones. Water-Wisteria, Hygrophila difformis (Acanthaceae), is a fast growing semi-aquatic plant that exhibits a variety of leaf shapes, from simple leaves to highly branched compound leaves, depending on the environment. The phenomenon by which leaves change their morphology in response to environmental conditions is called heterophylly. In order to investigate the characteristics of heterophylly, we assessed the morphology and anatomy of Hygrophila difformis in different conditions. Subsequently, we verified that phytohormones and environmental factors can induce heterophylly and found that Hygrophila difformis is easily propagated vegetatively through either leaf cuttings or callus induction, and the callus can be easily transformed by Agrobacterium tumefaciens. These results suggested that Hygrophila difformis is a good model plant to study heterophylly in higher aquatic plants.
[Mh] Termos MeSH primário: Folhas de Planta/metabolismo
Wisteria/metabolismo
[Mh] Termos MeSH secundário: Agrobacterium tumefaciens/genética
Reguladores de Crescimento de Planta/metabolismo
Folhas de Planta/fisiologia
Wisteria/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Growth Regulators)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180102
[Lr] Data última revisão:
180102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170504
[St] Status:MEDLINE
[do] DOI:10.1007/s00299-017-2148-6


  2 / 29 MEDLINE  
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[PMID]:28369100
[Au] Autor:Lai LL; Chan WK; Sthaneshwar P; Nik Mustapha NR; Goh KL; Mahadeva S
[Ad] Endereço:Gastroenterology and Hepatology Unit, Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
[Ti] Título:Serum Wisteria floribunda agglutinin-positive Mac-2 binding protein in non-alcoholic fatty liver disease.
[So] Source:PLoS One;12(4):e0174982, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Wisteria floribunda agglutinin-positive Mac-2 binding protein (WFA+-M2BP) has been suggested to be useful for the assessment of disease severity in non-alcoholic fatty liver disease (NAFLD). Consecutive adult NAFLD patients who had a liver biopsy were included. Serum WFA+-M2BP level was measured using a lectin-antibody sandwich immunoassay using a chemiluminescence enzyme immunoassay machine (HISCL-5000, Sysmex, Kobe, Japan). The measured levels were indexed using the following equation: Cut-off index (COI) = ([WFA+-M2BP]sample-[WFA+-M2BP]NC) / ([WFA+-M2BP]PC-[WFA+-M2BP]NC), where PC = positive control and NC = negative control. Histopathological examination of liver biopsy specimen was reported according to Non-Alcoholic Steatohepatitis (NASH) Clinical Research Network Scoring System. Data for 220 cases were analyzed. The AUROC of the COI for the diagnosis of NASH was 0.65. The AUROC of the COI for the diagnosis of steatosis grade ≥2 and 3 was 0.64 and 0.53, respectively. The AUROC of the COI for the diagnosis of lobular inflammation grade ≥1, ≥2 and 3 was 0.57, 0.68 and 0.59, respectively. The AUROC of the COI for the diagnosis of hepatocyte ballooning grade ≥1 and 2 was 0.64 and 0.65, respectively. The AUROC of the COI for the diagnosis of fibrosis stage ≥1, ≥2, ≥3 and 4 was 0.61, 0.71, 0.74 and 0.84, respectively. Out of the 220 cases, 152 cases were the same 76 patients who had a repeat liver biopsy after 48 weeks of intervention. The AUROC of the change in the COI to detect improvement in steatosis, lobular inflammation, hepatocyte ballooning and fibrosis was 0.57, 0.54, 0.59 and 0.52, respectively. In conclusion, serum WFA+-M2BP was most useful for the diagnosis of significant fibrosis, advanced fibrosis and cirrhosis in NAFLD patients. However, it was less useful for differentiating NASH from non-NASH, and for diagnosis and follow-up of the individual histopathological components of NASH.
[Mh] Termos MeSH primário: Antígenos de Neoplasias/sangue
Cirrose Hepática/patologia
Glicoproteínas de Membrana/sangue
Hepatopatia Gordurosa não Alcoólica/diagnóstico
Lectinas de Plantas/metabolismo
Receptores de N-Acetilglucosamina/metabolismo
Wisteria/metabolismo
[Mh] Termos MeSH secundário: Diagnóstico Diferencial
Feminino
Hepatócitos/patologia
Seres Humanos
Imunoensaio
Inflamação/diagnóstico
Cirrose Hepática/sangue
Luminescência
Masculino
Meia-Idade
Hepatopatia Gordurosa não Alcoólica/sangue
Hepatopatia Gordurosa não Alcoólica/patologia
Obesidade/patologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antigens, Neoplasm); 0 (Membrane Glycoproteins); 0 (Plant Lectins); 0 (Receptors, N-Acetylglucosamine); 0 (TAA90K protein, human); 0 (wisteria lectin)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170912
[Lr] Data última revisão:
170912
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170404
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0174982


  3 / 29 MEDLINE  
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[PMID]:28299484
[Au] Autor:Li Y; Deng C; Qiao Y; Zhao X; Zhou Q
[Ad] Endereço:College of Plant Science and Technology, Beijing University of Agriculture, Beijing, 102206, China. lyq@bua.edu.cn.
[Ti] Título:Characterization of a new badnavirus from Wisteria sinensis.
[So] Source:Arch Virol;162(7):2125-2129, 2017 Jul.
[Is] ISSN:1432-8798
[Cp] País de publicação:Austria
[La] Idioma:eng
[Ab] Resumo:The complete genome sequence of a previously undescribed badnavirus isolated from a wisteria plant exhibiting mosaic and crinkle symptoms in Beijing, China, was determined. The circular double-stranded DNA genome of this virus was 7362 bp in size with four open reading frames (ORFs 1 to 4) on the plus strand. Sequence analysis showed that this virus shared the highest (69%) nucleotide (nt) sequence identity with pagoda yellow mosaic associated virus (PYMAV). In the RT-RNase H region of the ORF-3 encoded polyprotein, this virus shared 74% nt sequence identity with PYMAV. Phylogenetic analysis provided further evidence that the virus identified in this study is a member of a new species in the genus Badnavirus. The name wisteria badnavirus 1 (WBV1) is proposed for this new virus.
[Mh] Termos MeSH primário: Badnavirus/classificação
Filogenia
Doenças das Plantas/virologia
Wisteria/virologia
[Mh] Termos MeSH secundário: Badnavirus/genética
Badnavirus/isolamento & purificação
China
DNA Viral/genética
Genoma Viral
Fases de Leitura Aberta
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Viral)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170802
[Lr] Data última revisão:
170802
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170317
[St] Status:MEDLINE
[do] DOI:10.1007/s00705-017-3322-4


  4 / 29 MEDLINE  
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[PMID]:27601469
[Au] Autor:Haji-Ghassemi O; Gilbert M; Spence J; Schur MJ; Parker MJ; Jenkins ML; Burke JE; van Faassen H; Young NM; Evans SV
[Ad] Endereço:From the Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8P 3P6, Canada and.
[Ti] Título:Molecular Basis for Recognition of the Cancer Glycobiomarker, LacdiNAc (GalNAc[ß1→4]GlcNAc), by Wisteria floribunda Agglutinin.
[So] Source:J Biol Chem;291(46):24085-24095, 2016 Nov 11.
[Is] ISSN:1083-351X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Aberrant glycosylation and the overexpression of specific carbohydrate epitopes is a hallmark of many cancers, and tumor-associated oligosaccharides are actively investigated as targets for immunotherapy and diagnostics. Wisteria floribunda agglutinin (WFA) is a legume lectin that recognizes terminal N-acetylgalactosaminides with high affinity. WFA preferentially binds the disaccharide LacdiNAc (ß-d-GalNAc-[1→4]-d-GlcNAc), which is associated with tumor malignancy in leukemia, prostate, pancreatic, ovarian, and liver cancers and has shown promise in cancer glycobiomarker detection. The mechanism of specificity for WFA recognition of LacdiNAc is not fully understood. To address this problem, we have determined affinities and structure of WFA in complex with GalNAc and LacdiNAc. Affinities toward Gal, GalNAc, and LacdiNAc were measured via surface plasmon resonance, yielding K values of 4.67 × 10 m, 9.24 × 10 m, and 5.45 × 10 m, respectively. Structures of WFA in complex with LacdiNAc and GalNAc have been determined to 1.80-2.32 Å resolution. These high resolution structures revealed a hydrophobic groove complementary to the GalNAc and, to a minor extent, to the back-face of the GlcNAc sugar ring. Remarkably, the contribution of this small hydrophobic surface significantly increases the observed affinity for LacdiNAc over GalNAc. Tandem MS sequencing confirmed the presence of two isolectin forms in commercially available WFA differing only in the identities of two amino acids. Finally, the WFA carbohydrate binding site is similar to a homologous lectin isolated from Vatairea macrocarpa in complex with GalNAc, which, unlike WFA, binds not only αGalNAc but also terminal Ser/Thr O-linked αGalNAc (Tn antigen).
[Mh] Termos MeSH primário: Biomarcadores Tumorais/química
Lactose/análogos & derivados
Lectinas de Plantas/química
Wisteria/química
[Mh] Termos MeSH secundário: Cristalografia por Raios X
Seres Humanos
Lactose/química
Ligação Proteica
Domínios Proteicos
Estrutura Secundária de Proteína
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biomarkers, Tumor); 0 (Plant Lectins); 136198-41-9 (N-acetylgalactosaminyl-1-4-N-acetylglucosamine); J2B2A4N98G (Lactose)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:171111
[Lr] Data última revisão:
171111
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160908
[St] Status:MEDLINE


  5 / 29 MEDLINE  
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[PMID]:27416967
[Au] Autor:Hoffberg SL; Kieran TJ; Catchen JM; Devault A; Faircloth BC; Mauricio R; Glenn TC
[Ad] Endereço:Department of Genetics, University of Georgia, Athens, GA, 30602, USA.
[Ti] Título:RADcap: sequence capture of dual-digest RADseq libraries with identifiable duplicates and reduced missing data.
[So] Source:Mol Ecol Resour;16(5):1264-78, 2016 Sep.
[Is] ISSN:1755-0998
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Molecular ecologists seek to genotype hundreds to thousands of loci from hundreds to thousands of individuals at minimal cost per sample. Current methods, such as restriction-site-associated DNA sequencing (RADseq) and sequence capture, are constrained by costs associated with inefficient use of sequencing data and sample preparation. Here, we introduce RADcap, an approach that combines the major benefits of RADseq (low cost with specific start positions) with those of sequence capture (repeatable sequencing of specific loci) to significantly increase efficiency and reduce costs relative to current approaches. RADcap uses a new version of dual-digest RADseq (3RAD) to identify candidate SNP loci for capture bait design and subsequently uses custom sequence capture baits to consistently enrich candidate SNP loci across many individuals. We combined this approach with a new library preparation method for identifying and removing PCR duplicates from 3RAD libraries, which allows researchers to process RADseq data using traditional pipelines, and we tested the RADcap method by genotyping sets of 96-384 Wisteria plants. Our results demonstrate that our RADcap method: (i) methodologically reduces (to <5%) and allows computational removal of PCR duplicate reads from data, (ii) achieves 80-90% reads on target in 11 of 12 enrichments, (iii) returns consistent coverage (≥4×) across >90% of individuals at up to 99.8% of the targeted loci, (iv) produces consistently high occupancy matrices of genotypes across hundreds of individuals and (v) costs significantly less than current approaches.
[Mh] Termos MeSH primário: Técnicas de Genotipagem/métodos
Análise de Sequência de DNA/métodos
[Mh] Termos MeSH secundário: DNA/química
DNA/genética
DNA/metabolismo
Enzimas de Restrição do DNA/metabolismo
Polimorfismo de Nucleotídeo Único
Wisteria/classificação
Wisteria/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
9007-49-2 (DNA); EC 3.1.21.- (DNA Restriction Enzymes)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170403
[Lr] Data última revisão:
170403
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160716
[St] Status:MEDLINE
[do] DOI:10.1111/1755-0998.12566


  6 / 29 MEDLINE  
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[PMID]:26332851
[Au] Autor:Bok A; Pierce LL; Gies C; Steiner V
[Ad] Endereço:St. Rita's Medical Center - Mercy Health, Lima, OH, USA.
[Ti] Título:Meanings of Falls and Prevention of Falls According to Rehabilitation Nurses: A Qualitative Descriptive Study.
[So] Source:Rehabil Nurs;41(1):45-53, 2016 Jan-Feb.
[Is] ISSN:0278-4807
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PURPOSE: Guided by Friedemann's theoretical framework, this survey explored the meaning of a fall of an institutionalized older adult or fall prevention to rehabilitation registered nurses and whether the experience changed the nurse's practice. DESIGN: Qualitative, descriptive survey. METHODS: A convenience sample of 742 rehabilitation nurses was asked to describe these experiences and the impact on their practice. FINDINGS: Themes discovered related to the meaning of a fall include negative feelings (incongruence) and positive feelings (congruence). Themes related to the meaning of preventing a fall include positive feelings (congruence). Practice change themes emerged from both the experience of a fall and fall prevention. Practice change themes were drawn to Friedemann's (1995) process dimensions. CONCLUSIONS AND CLINICAL RELEVANCE: Nurses' experiences and meanings of falls uncovered negative and positive feelings about these falls. New findings of this study were the positive feelings expressed by nurses, when there was no injury or when a fall was prevented.
[Mh] Termos MeSH primário: Acidentes por Quedas/prevenção & controle
Culpa
Recursos Humanos de Enfermagem no Hospital/psicologia
Enfermagem em Reabilitação/métodos
[Mh] Termos MeSH secundário: Adulto
Idoso
Idoso de 80 Anos ou mais
Atitude do Pessoal de Saúde
Competência Clínica
Feminino
Seres Humanos
Maine
Masculino
Meia-Idade
Pennsylvania
Pesquisa Qualitativa
Fatores Socioeconômicos
Inquéritos e Questionários
West Virginia
Wisteria
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1603
[Cu] Atualização por classe:160111
[Lr] Data última revisão:
160111
[Sb] Subgrupo de revista:N
[Da] Data de entrada para processamento:150903
[St] Status:MEDLINE
[do] DOI:10.1002/rnj.221


  7 / 29 MEDLINE  
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[PMID]:26228557
[Au] Autor:Cook RT; Denton JO; Denton G
[Ad] Endereço:30 Galtres Avenue, York, YO31 1JT, UK. Electronic address: rtacook@hotmail.com.
[Ti] Título:Pathology of oak-wisteria powdery mildew.
[So] Source:Fungal Biol;119(8):657-71, 2015 Aug.
[Is] ISSN:1878-6146
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The relationship between oak and wisteria powdery mildew, the reason artificial infection of Wisteria sinensis was difficult, and the identity of the pathogen were investigated. Inoculations of detached leaves of Quercus robur with Erysiphe alphitoides from either W. sinensis or Q. robur were successful. Wisteria floribunda was completely and W. sinensis partially resistant. Isolates from wisteria and oak had similar pathogenicities and matching DNA profiles and hence not separable into formae speciales. Instead, oak mildew now includes wisteria and possibly Sorbaria as hosts. On non-host Brassica and cellulose acetate, conidial germ tube development ceased after formation of terminal appressoria. Only Q. robur supported visible lesions. W. sinensis supported fewer colony forming hyphae (CFH) per conidium and smaller hyphal appressoria. Failure to form visible lesions was due to prevention or termination of CFH and not to inhibition of conidial germination or to a host's hypersensitive reaction. Absorption of antifungal compounds via appressoria from maturing host tissue is discussed. The pathogen's DNA ITS region indicated an identification of Erysiphe alphitoides sensu lato, since some isolates did not completely match E. alphitoides sensu stricto. To rapidly indicate susceptibility, a microscopic examination of young leaves 48 h post inoculation is recommended.
[Mh] Termos MeSH primário: Ascomicetos/classificação
Ascomicetos/isolamento & purificação
Doenças das Plantas/microbiologia
Quercus/microbiologia
Wisteria/microbiologia
[Mh] Termos MeSH secundário: Ascomicetos/genética
DNA Fúngico/química
DNA Fúngico/genética
DNA Espaçador Ribossômico/química
DNA Espaçador Ribossômico/genética
Dados de Sequência Molecular
Análise de Sequência de DNA
Homologia de Sequência do Ácido Nucleico
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA, Fungal); 0 (DNA, Ribosomal Spacer)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:150803
[Lr] Data última revisão:
150803
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150801
[St] Status:MEDLINE


  8 / 29 MEDLINE  
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[PMID]:25924517
[Au] Autor:Ono M; Iwashina T
[Ti] Título:Quantitative flavonoid variation accompanied by change of flower colors in Edgeworthia chrysantha, Pittosporum tobira and Wisteria floribunda.
[So] Source:Nat Prod Commun;10(3):413-6, 2015 Mar.
[Is] ISSN:1934-578X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The flavonoids in the flowers of Edgeworthia chrysantha, Pittosporum tobira and Wisteria floribunda were isolated and identified. Quercetin and kaempferol 3-O-glucosides and 3-O-rutinosides were found in E. chrysantha, and quercetin 3-O-rutinoside, 3-O-glucoside and 3-O-pentosylrhamnosylglucoside, kaempferol 3-O-robinobioside, 3-O-rutinoside, 3-O-glucoside and 3-O-pentosylrhamnosylglucoside, and isorhamnetin 3-O-rutinoside were isolated from P. tobira. Ten flavonoids, quercetin 3-O-sophoroside, 3-O-rutinoside, 3-O-glucoside, kaempferol 3-O-sophoroside and 3-O-glucoside, luteolin 5-O-glucoside, 7- O-glucoside and 7-O-hexoside, and apigenin 7-O-glucoside and 4'-O-hexoside were isolated from W floribunda. The major pigments of E. chrysantha were carotenoids. Their content decreased with the change in flower color to white from yellow via cream, and total flavonoid content also slightly decreased by ca. 0.8 in cream and ca. 0.9 fold in white flowers. In contrast with E. chrysantha, white flowers of P. tobira turn to cream and then yellow in which the major pigments are also carotenoids. In this species, both carotenoid and flavonoid contents are gradually increased from white to yellow flowers. Though the petal color of Wisteria floribunda is mauve, due to anthocyanin pigments, the yellow areas are due to carotenoids; these turn to white in the late flowering stage. However, their flavonoid contents were essentially the same among the yellow, cream and white spots of flags. Thus, it was shown by HPLC analysis of the flower flavonoids of E. chrysantha, P. tobira and W. floribunda, although the visible pigments such as carotenoids and anthocyanins are quantitatively varied, the quantitative variation in UV-absorbing substances, such as flavones and flavonols, differs with plant species.
[Mh] Termos MeSH primário: Flavonoides/química
Flores/química
Pigmentos Biológicos/metabolismo
Rosales/química
Thymelaeaceae/química
Wisteria/química
[Mh] Termos MeSH secundário: Pigmentos Biológicos/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Flavonoids); 0 (Pigments, Biological)
[Em] Mês de entrada:1506
[Cu] Atualização por classe:150430
[Lr] Data última revisão:
150430
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150501
[St] Status:MEDLINE


  9 / 29 MEDLINE  
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[PMID]:25566653
[Au] Autor:Wang GK; Liu JS; Xu YS; Wang G
[Ad] Endereço:Department of Pharmacy, University of Chinese Medicine, Hefei, China.
[Ti] Título:[Study on chemical constituents from crop pathogenic fungus active fraction of Wisteria sinensis tumor].
[So] Source:Zhong Yao Cai;37(7):1187-9, 2014 Jul.
[Is] ISSN:1001-4454
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:OBJECTIVE: To study the chemical constituents from the crop pathogenic fungus active fraction of Wisteria sinensis tumor. METHODS: The chemical constituents were extracted of different concentrations and isolated by silica gel and Sephadex LH-20 column. The chemical structures of components were further elucidated by the physicochemical characters and MS, NMR spectral data. RESULTS: Ten compounds were isolated and identified as dibutyl phthalate (1), diacetonealcohol (2), pinoresinol (3), stellasterol (4), oleanolic acid (5), olean-12-ene-3-oxo-22,24-diol (6), betulinic acid (7), 2',4',4-hydroxy-chalcone (8), avicularin (9) and quercetin-3-O-ß-D-glucopyranoside (10). CONCLUSION: All the compounds are isolated from the genus for the first time.
[Mh] Termos MeSH primário: Fungos/efeitos dos fármacos
Wisteria/química
[Mh] Termos MeSH secundário: Flavonoides
Furanos
Lignanas
Ácido Oleanólico
Doenças das Plantas
Triterpenos
[Pt] Tipo de publicação:ENGLISH ABSTRACT; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Flavonoids); 0 (Furans); 0 (Lignans); 0 (Triterpenes); 4G6A18707N (betulinic acid); 572-30-5 (avicularin); 6SMK8R7TGJ (Oleanolic Acid); V4N1UDY811 (pinoresinol)
[Em] Mês de entrada:1507
[Cu] Atualização por classe:150108
[Lr] Data última revisão:
150108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150109
[St] Status:MEDLINE


  10 / 29 MEDLINE  
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[PMID]:24259686
[Au] Autor:Price CA; Munro PR; Weitz JS
[Ad] Endereço:School of Plant Biology , University of Western Australia, Crawley, Perth 6009, Australia.
[Ti] Título:Estimates of leaf vein density are scale dependent.
[So] Source:Plant Physiol;164(1):173-80, 2014 Jan.
[Is] ISSN:1532-2548
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Leaf vein density (LVD) has garnered considerable attention of late, with numerous studies linking it to the physiology, ecology, and evolution of land plants. Despite this increased attention, little consideration has been given to the effects of measurement methods on estimation of LVD. Here, we focus on the relationship between measurement methods and estimates of LVD. We examine the dependence of LVD on magnification, field of view (FOV), and image resolution. We first show that estimates of LVD increase with increasing image magnification and resolution. We then demonstrate that estimates of LVD are higher with higher variance at small FOV, approaching asymptotic values as the FOV increases. We demonstrate that these effects arise due to three primary factors: (1) the tradeoff between FOV and magnification; (2) geometric effects of lattices at small scales; and; (3) the hierarchical nature of leaf vein networks. Our results help to explain differences in previously published studies and highlight the importance of using consistent magnification and scale, when possible, when comparing LVD and other quantitative measures of venation structure across leaves.
[Mh] Termos MeSH primário: Interpretação de Imagem Assistida por Computador/métodos
Folhas de Planta/anatomia & histologia
[Mh] Termos MeSH secundário: Apocynaceae/anatomia & histologia
Rosales/anatomia & histologia
Wisteria/anatomia & histologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1410
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:131122
[St] Status:MEDLINE
[do] DOI:10.1104/pp.113.224451



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