Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.618.100.060.400 [Categoria DeCS]
Referências encontradas : 31 [refinar]
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  1 / 31 MEDLINE  
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[PMID]:28629107
[Au] Autor:Shi L; Wang L; Zhang T; Li J; Huang X; Cai J; Lü J; Wang Y
[Ad] Endereço:College of Chemistry & Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
[Ti] Título:Reducing the bioavailability and leaching potential of lead in contaminated water hyacinth biomass by phosphate-assisted pyrolysis.
[So] Source:Bioresour Technol;241:908-914, 2017 Oct.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:For the purpose of safe disposal of biomass contaminated by biosorption of heavy metals, phosphate-assisted pyrolysis of water hyacinth biomass contaminated by lead (Pb) was tried to reduce the bioavailability and leaching potential of Pb, using direct pyrolysis without additive as a control method. Direct pyrolysis of the contaminated biomass at low temperatures (300 and 400°C) could reduce the bioavailability of Pb, but the leaching potential of Pb was increased with the rising pyrolysis temperature. While phosphate-assisted pyrolysis significantly enhanced the recovery and stability of Pb in the char. Specifically, the percentages of bioavailable Pb and leachable Pb in the chars obtained by phosphate-assisted pyrolysis at low temperatures were reduced to less than 5% and 7%, respectively. The sequential extraction test indicated the transformation of Pb into more stable fractions after phosphate-assisted pyrolysis, which was related to the formation of Pb phosphate minerals including pyromorphite and lead-substituted hydroxyapatite.
[Mh] Termos MeSH primário: Eichhornia
Chumbo
Poluentes do Solo
[Mh] Termos MeSH secundário: Disponibilidade Biológica
Biomassa
Hyacinthus
Fosfatos
Eliminação de Resíduos Líquidos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Phosphates); 0 (Soil Pollutants); 2P299V784P (Lead)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170621
[St] Status:MEDLINE


  2 / 31 MEDLINE  
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[PMID]:27422435
[Au] Autor:Kozlowska M; Niedojadlo K; Brzostek M; Bednarska-Kozakiewicz E
[Ad] Endereço:Department of Cell Biology, Faculty of Biology and Environment Protection, Nicolaus Copernicus University in Torun, Torun, Poland.
[Ti] Título:Epigenetic marks in the Hyacinthus orientalis L. mature pollen grain and during in vitro pollen tube growth.
[So] Source:Plant Reprod;29(3):251-63, 2016 09.
[Is] ISSN:2194-7961
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:During the sexual reproduction of flowering plants, epigenetic control of gene expression and genome integrity by DNA methylation and histone modifications plays an important role in male gametogenesis. In this study, we compared the chromatin modification patterns of the generative, sperm cells and vegetative nuclei during Hyacinthus orientalis male gametophyte development. Changes in the spatial and temporal distribution of 5-methylcytosine, acetylated histone H4 and histone deacetylase indicated potential differences in the specific epigenetic state of all analysed cells, in both the mature cellular pollen grains and the in vitro growing pollen tubes. Interestingly, we observed unique localization of chromatin modifications in the area of the generative and the vegetative nuclei located near each other in the male germ unit, indicating the precise mechanisms of gene expression regulation in this region. We discuss the differences in the patterns of the epigenetic marks along with our previous reports of nuclear metabolism and changes in chromatin organization and activity in hyacinth male gametophyte cells. We also propose that this epigenetic status of the analysed nuclei is related to the different acquired fates and biological functions of these cells.
[Mh] Termos MeSH primário: Cromatina/genética
Epigênese Genética
Hyacinthus/genética
[Mh] Termos MeSH secundário: 5-Metilcitosina
Núcleo Celular/genética
Metilação de DNA
Células Germinativas Vegetais
Código das Histonas
Histona Desacetilases/genética
Hyacinthus/crescimento & desenvolvimento
Especificidade de Órgãos
Proteínas de Plantas/genética
Tubo Polínico/genética
Tubo Polínico/crescimento & desenvolvimento
Polinização
Reprodução
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Chromatin); 0 (Plant Proteins); 6R795CQT4H (5-Methylcytosine); EC 3.5.1.98 (Histone Deacetylases)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170321
[Lr] Data última revisão:
170321
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160717
[St] Status:MEDLINE
[do] DOI:10.1007/s00497-016-0289-3


  3 / 31 MEDLINE  
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[PMID]:26846590
[Au] Autor:Attermeyer K; Flury S; Jayakumar R; Fiener P; Steger K; Arya V; Wilken F; van Geldern R; Premke K
[Ad] Endereço:Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Chemical Analytics and Biogeochemistry, Müggelseedamm 310, 12587 Berlin, Germany.
[Ti] Título:Invasive floating macrophytes reduce greenhouse gas emissions from a small tropical lake.
[So] Source:Sci Rep;6:20424, 2016 Feb 05.
[Is] ISSN:2045-2322
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Floating macrophytes, including water hyacinth (Eichhornia crassipes), are dominant invasive organisms in tropical aquatic systems, and they may play an important role in modifying the gas exchange between water and the atmosphere. However, these systems are underrepresented in global datasets of greenhouse gas (GHG) emissions. This study investigated the carbon (C) turnover and GHG emissions from a small (0.6 km(2)) water-harvesting lake in South India and analysed the effect of floating macrophytes on these emissions. We measured carbon dioxide (CO2) and methane (CH4) emissions with gas chambers in the field as well as water C mineralization rates and physicochemical variables in both the open water and in water within stands of water hyacinths. The CO2 and CH4 emissions from areas covered by water hyacinths were reduced by 57% compared with that of open water. However, the C mineralization rates were not significantly different in the water between the two areas. We conclude that the increased invasion of water hyacinths and other floating macrophytes has the potential to change GHG emissions, a process that might be relevant in regional C budgets.
[Mh] Termos MeSH primário: Gases/metabolismo
Hyacinthus/metabolismo
Lagos/análise
[Mh] Termos MeSH secundário: Carbono/metabolismo
Dióxido de Carbono/análise
Monitoramento Ambiental
Efeito Estufa
Metano/análise
Oxigênio/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Gases); 142M471B3J (Carbon Dioxide); 7440-44-0 (Carbon); OP0UW79H66 (Methane); S88TT14065 (Oxygen)
[Em] Mês de entrada:1701
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160206
[St] Status:MEDLINE
[do] DOI:10.1038/srep20424


  4 / 31 MEDLINE  
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[PMID]:26634035
[Ti] Título:Crystal Cathedral, Crystal Horse and Crystal Hyacinth.
[So] Source:Methodist Debakey Cardiovasc J;11(3):199, 2015 Jul-Sep.
[Is] ISSN:1947-6108
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Arquitetura
Arte
Gráficos por Computador
Cavalos
Hyacinthus
[Mh] Termos MeSH secundário: Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1609
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151204
[St] Status:MEDLINE
[do] DOI:10.14797/mdcj-11-3-199


  5 / 31 MEDLINE  
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[PMID]:26400314
[Au] Autor:Hu FR; Liu HH; Wang F; Bao RL; Liu GX
[Ad] Endereço:College of Landscape Architecture of Nanjing Forestry University, Nanjing, China.
[Ti] Título:Root tip chromosome karyotype analysis of hyacinth cultivars.
[So] Source:Genet Mol Res;14(3):10863-76, 2015 Sep 10.
[Is] ISSN:1676-5680
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:Karyotype analysis in plants helps to reveal the affinity relationships of species and their genetic evolution. The current study aimed to observe chromosome karyotypes and structures of Hyacinthus orientalis. Twenty hyacinth cultivars were introduced from Holland, and their water-cultivated root tips were used as experimental samples. A solution of colchicine (0.02%) and 8-hydroxyquinoline (0.02 M) was used as a 20-h pre-treatment. Subsequently, Carnot I was used for fixation and 45% acetic acid was used for dissociation. The squash method was selected to prepare chromosome spreads for microscopic observation. The basic chromosome number of the hyacinth cultivar was 8, and the number of chromosomes in the diploid, triploid, tetraploid, and aneuploid cultivars was 16, 23, 24, 31, and 32, respectively. The L-type chromosome was predominant in the chromosomal composition. The hyacinth satellite was located on the short arm in numbers equivalent to the ploidy. This satellite is located on the middle-sized chromosome in the fourth group of chromosomes, demonstrating that Hyacinthus has a more primitive evolution than Lilium and Polygonatum. Among 20 hyacinth cultivars, 'Fondant' had the highest level of evolution and a maximum asymmetric coefficient of 61.69%. Moreover, the ratio between the shortest and longest chromosomes in this cultivar was 4.40, and its karyotype was type 2C. This study may elucidate long-term homonym and synonym phenomena. It may also provide a method of cytological identification as well as direct proof of the high outcross compatibility between hyacinth cultivars.
[Mh] Termos MeSH primário: Hyacinthus/genética
[Mh] Termos MeSH secundário: Aberrações Cromossômicas
Cromossomos de Plantas
Evolução Molecular
Cariótipo
Raízes de Plantas/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1608
[Cu] Atualização por classe:150924
[Lr] Data última revisão:
150924
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150925
[St] Status:MEDLINE
[do] DOI:10.4238/2015.September.9.24


  6 / 31 MEDLINE  
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[PMID]:26354004
[Au] Autor:Niedojadlo K; Lenartowski R; Lenartowska M; Bednarska-Kozakiewicz E
[Ad] Endereço:Department of Cell Biology, Faculty of Biology and Environment Protection, Nicolaus Copernicus University in Torun, Torun, Poland. karask@umk.pl.
[Ti] Título:Late progamic phase and fertilization affect calreticulin expression in the Hyacinthus orientalis female gametophyte.
[So] Source:Plant Cell Rep;34(12):2201-15, 2015 Dec.
[Is] ISSN:1432-203X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:KEY MESSAGE: Calreticulin expression is upregulated during sexual reproduction of Hyacinthus orientalis, and the protein is localized both in the cytoplasm and a highly specialized cell wall within the female gametophyte. Several evidences indicate calreticulin (CRT) as an important calcium (Ca(2+))-binding protein that is involved in the generative reproduction of higher plants, including both pre-fertilization and post-fertilization events. Because CRT is able to bind and sequester exchangeable Ca(2+), it can serve as a mobile intracellular store of easily releasable Ca(2+) and control its local cytosolic concentrations in the embryo sac. This phenomenon seems to be essential during the late progamic phase, gamete fusion, and early embryogenesis. In this report, we demonstrate the differential expression of CRT within Hyacinthus female gametophyte cells before and during anthesis, during the late progamic phase when the pollen tube enters the embryo sac, and at the moment of fertilization and zygote/early endosperm activation. CRT mRNA and the protein localize mainly to the endoplasmic reticulum (ER) and Golgi compartments of the cells, which are involved in sexual reproduction events, such as those in sister synergids, the egg cell, the central cell, zygote and the developing endosperm. Additionally, immunogold research demonstrates selective CRT distribution in the filiform apparatus (FA), a highly specific component of the synergid cell wall. In the light of our previous data showing the total transcriptional activity of the Hyacinthus female gametophyte and the results presented here, we discuss the possible functions of CRT with respect to the critical role of Ca(2+) homeostasis during key events of sexual plant reproduction. Moreover, we propose that the elevated expression of CRT within the female gametophyte is a universal phenomenon in the cells involved in double fertilization in higher plants.
[Mh] Termos MeSH primário: Cálcio/metabolismo
Calreticulina/metabolismo
Regulação da Expressão Gênica de Plantas
Hyacinthus/fisiologia
[Mh] Termos MeSH secundário: Calreticulina/genética
Parede Celular/metabolismo
Retículo Endoplasmático/metabolismo
Endosperma/citologia
Endosperma/genética
Endosperma/fisiologia
Fertilização
Células Germinativas Vegetais/citologia
Células Germinativas Vegetais/fisiologia
Homeostase
Hyacinthus/citologia
Hyacinthus/genética
Tubo Polínico/citologia
Tubo Polínico/genética
Tubo Polínico/fisiologia
Polinização
Reprodução
Ativação Transcricional
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Calreticulin); SY7Q814VUP (Calcium)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150911
[St] Status:MEDLINE
[do] DOI:10.1007/s00299-015-1863-0


  7 / 31 MEDLINE  
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[PMID]:26229953
[Au] Autor:Fahad SM; Islam AF; Ahmed M; Uddin N; Alam MR; Alam MF; Khalik MF; Hossain MS; Hossain ML; Abedin MJ
[Ad] Endereço:Department of Physics, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh.
[Ti] Título:Determination of Elemental Composition of Malabar spinach, Lettuce, Spinach, Hyacinth Bean, and Cauliflower Vegetables Using Proton Induced X-Ray Emission Technique at Savar Subdistrict in Bangladesh.
[So] Source:Biomed Res Int;2015:128256, 2015.
[Is] ISSN:2314-6141
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The concentrations of 18 different elements (K, Ca, Fe, Cl, P, Zn, S, Mn, Ti, Cr, Rb, Co, Br, Sr, Ru, Si, Ni, and Cu) were analyzed in five selected vegetables through Proton Induced X-ray Emission (PIXE) technique. The objective of this study was to provide updated information on concentrations of elements in vegetables available in the local markets at Savar subdistrict in Bangladesh. These elements were found in varying concentrations in the studied vegetables. The results also indicated that P, Cl, K, Ca, Mn, Fe, and Zn were found in all vegetables. Overall, K and Ca exhibited the highest concentrations. Cu and Ni exhibited the lowest concentrations in vegetables. The necessity of these elements was also evaluated, based on the established limits of regulatory standards. The findings of this study suggest that the consumption of these vegetables is not completely free of health risks.
[Mh] Termos MeSH primário: Brassica/química
Elementos
Hyacinthus/química
Alface/química
Espectrometria por Raios X/métodos
Spinacia oleracea/química
Verduras/química
[Mh] Termos MeSH secundário: Bangladesh
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Elements)
[Em] Mês de entrada:1605
[Cu] Atualização por classe:150804
[Lr] Data última revisão:
150804
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150801
[St] Status:MEDLINE
[do] DOI:10.1155/2015/128256


  8 / 31 MEDLINE  
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[PMID]:26119051
[Au] Autor:Yan J; Wei Z; Wang Q; He M; Li S; Irbis C
[Ad] Endereço:Laboratory of Bioconversion, Life Science and Technology College, Kunming University of Science and Technology, Kunming 650500, PR China.
[Ti] Título:Bioethanol production from sodium hydroxide/hydrogen peroxide-pretreated water hyacinth via simultaneous saccharification and fermentation with a newly isolated thermotolerant Kluyveromyces marxianu strain.
[So] Source:Bioresour Technol;193:103-9, 2015 Oct.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In this study, bioethanol production from NaOH/H2O2-pretreated water hyacinth was investigated. Pretreatment of water hyacinth with 1.5% (v/v) H2O2 and 3% (w/v) NaOH at 25 °C increased the production of reducing sugars (223.53 mg/g dry) and decreased the cellulose crystallinity (12.18%), compared with 48.67 mg/g dry and 22.80% in the untreated sample, respectively. The newly isolated Kluyveromyces marxianu K213 showed greater ethanol production from glucose (0.43 g/g glucose) at 45 °C than did the control Saccharomyces cerevisiae angel yeast. The maximum ethanol concentration (7.34 g/L) achieved with K. marxianu K213 by simultaneous saccharification and fermentation (SSF) from pretreated water hyacinth at 42 °C was 1.78-fold greater than that produced by angel yeast S. cerevisiae at 30 °C. The present work demonstrates that bioethanol production achieved via SSF of NaOH/H2O2-pretreated water hyacinth with K. marxianu K213 is a promising strategy to utilize water hyacinth biomass.
[Mh] Termos MeSH primário: Etanol/metabolismo
Fermentação/fisiologia
Hyacinthus/metabolismo
Peróxido de Hidrogênio/metabolismo
Kluyveromyces/metabolismo
Hidróxido de Sódio/metabolismo
[Mh] Termos MeSH secundário: Biocombustíveis/microbiologia
Biomassa
Reatores Biológicos/microbiologia
Celulase/metabolismo
Celulose/metabolismo
Saccharomyces cerevisiae/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Biofuels); 3K9958V90M (Ethanol); 55X04QC32I (Sodium Hydroxide); 9004-34-6 (Cellulose); BBX060AN9V (Hydrogen Peroxide); EC 3.2.1.4 (Cellulase)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:150724
[Lr] Data última revisão:
150724
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150630
[St] Status:MEDLINE


  9 / 31 MEDLINE  
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[PMID]:25908819
[Au] Autor:Yeung LY; Ash JL; Young ED
[Ad] Endereço:Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095, USA. Department of Earth Science, Rice University, Houston, TX 77005, USA. lyeung@rice.edu jlash@ucla.edu.
[Ti] Título:Isotope geochemistry. Biological signatures in clumped isotopes of O2.
[So] Source:Science;348(6233):431-4, 2015 Apr 24.
[Is] ISSN:1095-9203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The abundances of molecules containing more than one rare isotope have been applied broadly to determine formation temperatures of natural materials. These applications of "clumped" isotopes rely on the assumption that isotope-exchange equilibrium is reached, or at least approached, during the formation of those materials. In a closed-system terrarium experiment, we demonstrate that biological oxygen (O2) cycling drives the clumped-isotope composition of O2 away from isotopic equilibrium. Our model of the system suggests that unique biological signatures are present in clumped isotopes of O2­and not formation temperatures. Photosynthetic O2 is depleted in (18)O(18)O and (17)O(18)O relative to a stochastic distribution of isotopes, unlike at equilibrium, where heavy-isotope pairs are enriched. Similar signatures may be widespread in nature, offering new tracers of biological and geochemical cycling.
[Mh] Termos MeSH primário: Oxigênio/química
Fotossíntese
[Mh] Termos MeSH secundário: Hyacinthus/química
Hyacinthus/metabolismo
Oxigênio/metabolismo
Isótopos de Oxigênio/análise
Isótopos de Oxigênio/química
Complexo de Proteína do Fotossistema II/química
Processos Estocásticos
Temperatura Ambiente
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Oxygen Isotopes); 0 (Photosystem II Protein Complex); 059QF0KO0R (Water); S88TT14065 (Oxygen)
[Em] Mês de entrada:1506
[Cu] Atualização por classe:150424
[Lr] Data última revisão:
150424
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150425
[St] Status:MEDLINE
[do] DOI:10.1126/science.aaa6284


  10 / 31 MEDLINE  
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[PMID]:25813029
[Au] Autor:Zhu H; Huang G
[Ad] Endereço:Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
[Ti] Título:Humidity independent mass spectrometry for gas phase chemical analysis via ambient proton transfer reaction.
[So] Source:Anal Chim Acta;867:67-73, 2015 Mar 31.
[Is] ISSN:1873-4324
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In this work, a humidity independent mass spectrometric method was developed for rapid analysis of gas phase chemicals. This method is based upon ambient proton transfer reaction between gas phase chemicals and charged water droplets, in a reaction chamber with nearly saturate humidity under atmospheric pressure. The humidity independent nature enables direct and rapid analysis of raw gas phase samples, avoiding time- and sample-consuming sample pretreatments in conventional mass spectrometry methods to control sample humidity. Acetone, benzene, toluene, ethylbenzene and meta-xylene were used to evaluate the analytical performance of present method. The limits of detection for benzene, toluene, ethylbenzene and meta-xylene are in the range of ∼0.1 to ∼0.3 ppbV; that of benzene is well below the present European Union permissible exposure limit for benzene vapor (5 µg m(-3), ∼1.44 ppbV), with linear ranges of approximately two orders of magnitude. The majority of the homemade device contains a stainless steel tube as reaction chamber and an ultrasonic humidifier as the source of charged water droplets, which makes this cheap device easy to assemble and facile to operate. In addition, potential application of this method was illustrated by the real time identification of raw gas phase chemicals released from plants at different physiological stages.
[Mh] Termos MeSH primário: Gases/química
Umidade
Espectrometria de Massas/métodos
Compostos Orgânicos/análise
Compostos Orgânicos/química
Prótons
[Mh] Termos MeSH secundário: Flores/química
Hyacinthus/química
Limite de Detecção
Sonicação
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Gases); 0 (Organic Chemicals); 0 (Protons); 059QF0KO0R (Water)
[Em] Mês de entrada:1512
[Cu] Atualização por classe:150327
[Lr] Data última revisão:
150327
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150328
[St] Status:MEDLINE



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