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1.
Sci Total Environ ; 634: 821-830, 2018 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-29653426

RESUMO

Pollen-mediated gene flow (PMGF) from genetically modified (GM) Brassica napus to its wild relatives by wind and insects is a major ecological concern in agricultural ecosystems. This study conducted is to estimate maximum potential gene flow and differentiate between wind- and bee-mediated gene flows from herbicide resistant (HR) B. napus to its closely-related male sterile (MS) relatives, B. napus, B. juncea and Raphanus sativus. Various markers, including pods formation in MS plants, herbicide resistance, and SSR markers, were used to identify the hybrids. Our results revealed the following: 1) maximum potential gene flow (a maximum % of the progeny of pollen recipient confirmed hybrid) to MS B. napus ranged from 32.48 to 0.30% and from 14.69 to 0.26% at 2-128 m from HR B. napus under open and wind pollination conditions, respectively, and to MS B. juncea ranged from 21.95 to 0.24% and from 6.16 to 0.16%, respectively; 2) estimates of honeybee-mediated gene flow decreased with increasing distance from HR B. napus and ranged from 17.78 to 0.03% at 2-128 m for MS B. napus and from 15.33 to 0.08% for MS B. juncea; 3) a small-scale donor plots would strongly favour insect over wind pollination; 4) no gene flow occurred from HR B. napus to MS R. sativus. Our approach and findings are helpful in understanding the relative contribution of wind and bees to gene flow and useful for estimating maximum potential gene flow and managing environmental risks associated with gene flow.


Assuntos
Brassica napus/genética , Resistência a Herbicidas/genética , Plantas Geneticamente Modificadas , Polinização , Vento , Animais , Abelhas , Brassica rapa , Herbicidas , Masculino
2.
Materials (Basel) ; 11(1)2018 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-29301269

RESUMO

TiO2 nanotubes (TNT) formation is beneficial for improving bone cell-material interaction and drug delivery for Ti dental implants. Among the natural drugs to be installed in TNT, selected propolis has antibacterial and anti-inflammatory properties. It is a resinous natural product which is collected by the honeybees from the various types of plants with their salivary enzymes. This study concludes that TNT loaded with a propolis (PL-TNT-Ti) dental implant has the ability to improve osseointegration. The propolis particles were embedded within the TNT or adhered to the top. In a cytotoxicity test using osteoblast, PL-TNT-Ti group exhibited an increased cell proliferation and differentiation. A Sprague Dawley rat mandibular model was used to evaluate the osseointegration and bone bonding of TNT or PL-TNT-Ti. From the µ-CT and hematoxylin and eosin (HE) histological results after implantation at 1 and 4 weeks to rat mandibular, an increase in the extent of new bone formation and mineral density around the PL-TNT-Ti implant was confirmed. The Masson's trichrome staining showed the expression of well-formed collagenous for bone formation on the PL-TNT-Ti. Immunohistochemistry staining indicate that bone morphogenetic proteins (BMP-2 and BMP-7) around the PL-TNT-Ti increased the expression of collagen fibers and of osteogenic differentiation whereas the expression of inflammatory cytokine such as interleukin-1 beta (IL-1ß) and tumor necrosis factor-alpha (TNF-α) is decreased.

3.
J Food Sci ; 80(3): C510-4, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25678328

RESUMO

To compare the oxidative stability between diacylglycerol (DAG) oil and conventional triacylglycerol (TAG) oil (that is, soybean oil), the prepared stripped diacylglycerol oil (SDO) and soybean oil (SSBO) were stored at 60 °C in the dark for 144 h. During storage peroxide values (POVs), contents of aldehydes, unsaturated fatty acids were measured to evaluate the oxidative stabilities of the 2 oils. The results showed the content of C18:2, C18:3, and total unsaturated fatty acid decreased faster in DAG oil than in soybean oil, whereas the decreased rate of C18:1 was similar in 2 oils. Also, both rate constants (K1 and K2) obtained from POV (K1 ) and total aldehydes (K2 ) indicated that DAG oil (K1 = 3.22 mmol/mol FA h(-1) , K2 = 0.023 h(-1)) was oxidized more rapidly than soybean oil (K1 = 2.56 mmol/mol FA h(-1) , K2 = 0.021 h(-1)), which was mainly due to the difference of acylglycerol composition of the 2 oils along with higher C18:3 (9.6%) in SDO than SSBO (5.7%). It is concluded that DAG was more easily oxidized than soybean oil at 60 °C in the dark for 144 h.


Assuntos
Diglicerídeos/análise , Peroxidação de Lipídeos , Óleos/análise , Óleo de Soja/análise , Triglicerídeos/análise , Dieta , Glicerídeos/análise , Humanos , Oxirredução
4.
Plant Cell Rep ; 33(2): 289-99, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24384821

RESUMO

Soil waterlogging is a serious constraint to crop production. We investigated the physiological responses of rape (Brassica napus L.) seedlings to waterlogging stress and analyzed global gene transcription responses in the aerial leaves of waterlogged rape seedlings. Seedlings of 'Tammi' and 'Youngsan' cultivars were subjected to waterlogging for 3 and 6 days and recovery for 5 days. Waterlogging stress caused a significant decrease in leaf chlorophyll content and premature senescence of the leaves. Maximal quantum efficiency of PSII (F(v)/F(m)) decreased in the waterlogged seedlings compared with the control plants. To evaluate whether the observed physiological changes in the leaves are associated with the differential regulation of gene expression in response to waterlogging stress, we analyzed the global transcriptional profile of leaves of 'Tammi' seedlings that were exposed to waterlogging for a short period (36 and 72 h). SolexaQA RNA-seq analysis revealed that a total of 4,484 contigs (8.5 %) of all contigs assayed (52,747) showed a twofold change in expression after 36 h of the start of waterlogging and 9,659 contigs (18.3 %) showed a twofold change after 72 h. Major genes involved in leaf photosynthesis, including light reactions and carbon-fixing reactions, were downregulated, while a number of genes involved in the scavenging of reactive oxygen species, degradation (proteins, starch, and lipids), premature senescence, and abiotic stress tolerance were upregulated. Transcriptome analysis data suggested that the aerial leaves of waterlogged rape seedlings respond to hypoxia by regulating the expression of diverse genes in the leaves.


Assuntos
Brassica napus/genética , Regulação da Expressão Gênica de Plantas , Fotossíntese , Proteínas de Plantas/genética , Estresse Fisiológico , Água/fisiologia , Adaptação Fisiológica , Brassica napus/fisiologia , Clorofila/metabolismo , Perfilação da Expressão Gênica , Folhas de Planta/genética , Folhas de Planta/fisiologia , Raízes de Plantas/genética , Espécies Reativas de Oxigênio/metabolismo , Plântula/genética , Plântula/fisiologia
5.
Am J Ophthalmol ; 156(6): 1192-1200.e1, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24011522

RESUMO

PURPOSE: To evaluate the effect of choroidal vascular hyperpermeability, as determined using indocyanine green angiography (ICGA), on the outcome of anti-vascular endothelial growth factor (VEGF) treatment for polypoidal choroidal vasculopathy (PCV). DESIGN: Retrospective comparative series. METHODS: Based on the presence of choroidal vascular hyperpermeability on ICGA, 103 eyes (101 patients) with PCV were categorized into 2 subgroups: choroidal vascular hyperpermeability (+) group (41 eyes) and choroidal vascular hyperpermeability (-) group (62 eyes). All subjects were treatment naïve and treated by anti-VEGF with initial 3 loading injections per month, followed by an as-needed reinjection. Best-corrected visual acuity (BCVA) and central macular thickness after treatment were compared between the 2 groups at baseline and at 3, 6, 9, and 12 months. RESULTS: At 12 months after treatment, mean BCVA was significantly improved from 0.68 logarithm of the minimal angle of resolution (logMAR) (20/95 Snellen equivalent) to 0.50 logMAR (20/63 Snellen equivalent) in the choroidal vascular hyperpermeability (-) group (P = .01); however, there was no significant improvement, from 0.79 logMAR (20/123 Snellen equivalent) to 0.74 logMAR (20/109 Snellen equivalent), in the choroidal vascular hyperpermeability (+) group. In paired comparisons of BCVA between baseline and each follow-up visit, the choroidal vascular hyperpermeability (-) group showed significant improvement of BCVA at every follow-up visit (P < .05); however, the choroidal vascular hyperpermeability (+) group did not show significant visual improvement after 9 months (P > .05). CONCLUSIONS: The therapeutic response to anti-VEGF treatment for PCV in patients with choroidal vascular hyperpermeability decreased over time. Choroidal vascular hyperpermeability was associated with an inferior visual outcome after intravitreal anti-VEGF treatment for PCV.


Assuntos
Inibidores da Angiogênese/uso terapêutico , Permeabilidade Capilar , Doenças da Coroide/tratamento farmacológico , Corioide/irrigação sanguínea , Pólipos/tratamento farmacológico , Fator A de Crescimento do Endotélio Vascular/antagonistas & inibidores , Idoso , Anticorpos Monoclonais Humanizados/uso terapêutico , Bevacizumab , Doenças da Coroide/diagnóstico , Doenças da Coroide/fisiopatologia , Corantes , Feminino , Angiofluoresceinografia , Humanos , Verde de Indocianina , Injeções Intravítreas , Masculino , Pólipos/diagnóstico , Pólipos/fisiopatologia , Ranibizumab , Estudos Retrospectivos , Tomografia de Coerência Óptica , Acuidade Visual/fisiologia
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