Base de dados : MEDLINE
Pesquisa : D01.268.552 [Categoria DeCS]
Referências encontradas : 392 [refinar]
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[PMID]:28433931
[Au] Autor:Wang B; Yan L; Sun Y; Yan J; Lu Q; Zhang J; Li Z
[Ad] Endereço:Institute of Reproductive and Child Health, Peking University/Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing 100191, PR China; Department of Epidemiology and Biostatistics, School of Public Health, Peking University, B
[Ti] Título:Alkaline-earth elements of scalp hair and presence of hypertension in housewives: A perspective of chronic effect.
[So] Source:Chemosphere;181:134-141, 2017 Aug.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The relationship between population intakes of alkaline-earth elements (AEEs) and hypertension risk remains under discussion. Hair AEE concentrations can indicate their intake levels into human body. Thus, we aimed to investigate an association of hair AEE concentrations with hypertension risk, and the potential effect of dietary habit on this association. We recruited 398 housewives [163 subjects with hypertension (case group) and 235 subjects without hypertension (control group)] in Shanxi Province of north China. The scalp hair grown in the recent 2 years of each subject was collected and analyzed for the four concerned AEEs [i.e. calcium (Ca), magnesium (Mg), strontium (Sr), and barium (Ba)]. Our study results revealed that median concentrations (µg/g hair) of hair AEEs in the case group were systematically lower than those in control group [i.e. 701 vs. 1271 of Ca, 55.2 vs. 88.3 of Mg, 4.60 vs. 10.4 of Sr, and 1.02 vs. 1.68 of Ba]. Lower levels of the four individual AEEs of hair were associated with an increased presence of hypertension, respectively. Moreover, hair AEE concentrations were all positively correlated with the ingestion frequencies of meat, eggs, fresh vegetables, and fruits, while negatively with that of salted vegetables. A high ingestion frequency of fresh vegetables was associated with a lower prevalence of hypertension with or without adjusting confounders, while salted vegetables revealed a reverse tend. It was concluded that low hair AEEs, as markers of their long-term dietary intake, were associated with the presence of hypertension in a rural Chinese women.
[Mh] Termos MeSH primário: Cabelo/química
Hipertensão
Metais Alcalinoterrosos/análise
[Mh] Termos MeSH secundário: Adulto
Grupo com Ancestrais do Continente Asiático
China
Dieta
Feminino
Seres Humanos
Prevalência
População Rural
Couro Cabeludo
Verduras
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Alkaline Earth)
[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:170424
[St] Status:MEDLINE


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[PMID]:28118572
[Au] Autor:Thompson JJ; Pacquette LH
[Ad] Endereço:Abbott Nutrition, 3300 Stelzer Rd, Columbus, OH 43219.
[Ti] Título:Characterization of Final Action 2011.19 and First Action 2015.06 Performance at Analyte Levels Corresponding to CODEX STAN 72 (1981) Minimum Levels.
[So] Source:J AOAC Int;100(2):522-531, 2017 Mar 01.
[Is] ISSN:1060-3271
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A limited single-laboratory validation (SLV) was conducted in the authors' laboratory to investigate the performance of AOAC Official MethodsSM 2011.19 Determination of Chromium (Cr), Selenium (Se), and Molybdenum (Mo) in Infant Formula and Adult Nutritional Products by Inductively Coupled Plasma/Mass Spectrometry and 2015.06 Determination of Minerals and Trace Elements in Infant Formula and Adult/Pediatric Nutritional Formula by Inductively Coupled Plasma/Mass Spectrometry at analyte levels below the practical LOQs (PLOQs) already published for these Final Action Official Methods. This work was needed to verify that the actual LOQs were below the minimum requirements for minerals in infant formula as given in CODEX STAN 72 (1981). Linearity studies at low levels were conducted as well as the analysis of blanks over multiple days to establish the LOQs (as opposed to PLOQs) for these nutrients. Several placebo matrixes from the AOAC Stakeholder Panel on Infant Formula and Adult Nutritionals (SPIFAN) program were tested over multiple days at two different sample sizes to quantitate the effect of doubling the sample size given in the original publications. The SLV results indicate that both methods can meet the Codex minimum requirements as-is, without modification of the methods, albeit with a relaxation of the stringent precision criteria originally established for these methods by SPIFAN. Precision can be improved by doubling the sample size, but this step is not necessary to use the method for its intended purpose. A concurrent collaborative study of Method 2015.06 showed that the RSDR obtained across eight laboratories for several infant formula placebos containing mineral concentrations between the PLOQ and LOQ were indeed worse than SPIFAN expectations, but reasonable Horwitz ratios (HorRat) were nonetheless obtained for these analytes.
[Mh] Termos MeSH primário: Fórmulas Infantis/análise
[Mh] Termos MeSH secundário: Cromo/análise
Seres Humanos
Fórmulas Infantis/normas
Metais Alcalinos/análise
Metais Alcalinoterrosos/análise
Molibdênio/análise
Fósforo/análise
Selênio/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; VALIDATION STUDIES
[Nm] Nome de substância:
0 (Metals, Alkali); 0 (Metals, Alkaline Earth); 0R0008Q3JB (Chromium); 27YLU75U4W (Phosphorus); 81AH48963U (Molybdenum); H6241UJ22B (Selenium)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170606
[Lr] Data última revisão:
170606
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170125
[St] Status:MEDLINE
[do] DOI:10.5740/jaoacint.16-0325


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[PMID]:27835688
[Au] Autor:Nadeau MB; P Khasa D
[Ad] Endereço:Centre for Forest Research, Institute of Integrative and Systems Biology, and Canadian Research Chair in Forest and Environmental Genomics, Université Laval, Quebec city, QC, Canada, G1V0A6.
[Ti] Título:Edaphic Selection Pressures as Drivers of Contrasting White Spruce Ectomycorrhizal Fungal Community Structure and Diversity in the Canadian Boreal Forest of Abitibi-Témiscamingue Region.
[So] Source:PLoS One;11(11):e0166420, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Little is known about edaphic selection pressures as drivers of contrasting white spruce ectomycorrhizal fungal community structure and diversity in the Canadian boreal forest. We hypothesized that community composition differs among the four sites sampled-nursery, mining site, forest edge, and natural forest. Ectomycorrhizal (ECM) fungal community structure and diversity was studied at the four locations with soil fertility gradient through morpho-molecular and phylogenetic analyses in relationships with rhizospheric soil chemical properties. 41 different species were identified. Mining site had a significantly different species composition than the surrounding environments. Soil pH and percentage of roots colonized by ECM fungi increased while soil P, N, Fe, C, K, Mg, Al, Ca, and Na contents declined across the soil fertility gradient: nursery → natural forest → forest edge → mining site. Contrary to the preference of acid soils by ECM fungi, a few ecologically adapted to high pH, poor soil chemical fertility, and low organic matter content colonize white spruce roots on the non-acidogenic mining site, allowing natural regeneration of white spruce seedlings. Other ECM fungi are adapted to high fertigation level of commercial nursery. This study clearly shows the contrasting difference in white spruce ectomycorrhizal fungal community structure and diversity driven by edaphic selection pressures.
[Mh] Termos MeSH primário: DNA Fúngico/genética
Micorrizas/classificação
Picea/microbiologia
Seleção Genética
Microbiologia do Solo
Solo/química
[Mh] Termos MeSH secundário: Canadá
DNA Fúngico/isolamento & purificação
Variação Genética
Concentração de Íons de Hidrogênio
Metais Alcalinoterrosos/análise
Consórcios Microbianos
Micorrizas/genética
Filogenia
Picea/crescimento & desenvolvimento
Taiga
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Fungal); 0 (Metals, Alkaline Earth); 0 (Soil)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161112
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0166420


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[PMID]:27712057
[Au] Autor:Cam N; Benzerara K; Georgelin T; Jaber M; Lambert JF; Poinsot M; Skouri-Panet F; Cordier L
[Ad] Endereço:Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Institut de Recherche pour le Développement (IRD) Unité Mixte de Recherche (UMR) 206, Muséum National d'Histoire Naturelle, UMR Centre National de la Recherche Scientifique (CNRS) 7590, Université Pierre et Marie Curie (UP
[Ti] Título:Selective Uptake of Alkaline Earth Metals by Cyanobacteria Forming Intracellular Carbonates.
[So] Source:Environ Sci Technol;50(21):11654-11662, 2016 Nov 01.
[Is] ISSN:1520-5851
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The uptakes of calcium (Ca), strontium (Sr), and barium (Ba) by two cyanobacterial strains, Cyanothece sp. PCC7425 and Gloeomargarita lithophora, both forming intracellular carbonates, were investigated in laboratory cultures. In the culture medium BG-11 amended with 250 µM Ca and 50 or 250 µM Sr and Ba, G. lithophora accumulated first Ba, then Sr, and finally Ca. Sr and Ba were completely accumulated by G. lithophora cells at rates between 0.02 and 0.10 fmol h cell and down to extracellular concentrations below the detection limits of inductively coupled plasma atomic emission spectroscopy. Accumulation of Sr and Ba did not affect the growth rate of the strain. This sequential accumulation occurred mostly intracellularly within polyphosphate and carbonate granules and resulted in the formation of core-shell structures in carbonates. In contrast, Cyanothece sp. PCC7425 showed neither a preferential accumulation of heavier alkaline earth metals nor core-shell structures in the carbonates. This indicated that fractionation between alkaline earth metals was not inherent to intracellularly calcifying cyanobacteria but was likely a genetically based trait of G. lithophora. Overall, the capability of G. lithophora to sequester preferentially Sr and Ba at high rates may be of considerable interest for designing new remediation strategies and better understanding the geochemical cycles of these elements.
[Mh] Termos MeSH primário: Bário/química
Metais Alcalinoterrosos/química
[Mh] Termos MeSH secundário: Carbonatos/química
Cianobactérias
Estrôncio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbonates); 0 (Metals, Alkaline Earth); 24GP945V5T (Barium); YZS2RPE8LE (Strontium)
[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:161008
[St] Status:MEDLINE


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[PMID]:26956390
[Au] Autor:Power B; Haldys V; Salpin JY; Fridgen TD
[Ad] Endereço:Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada.
[Ti] Título:Structures of [M(Ura-H)(H2 O)n ](+) (M = Mg, Ca, Sr, Ba; n = 1-3) complexes in the gas phase by IRMPD spectroscopy and theoretical studies.
[So] Source:J Mass Spectrom;51(3):236-44, 2016 Mar.
[Is] ISSN:1096-9888
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The structures of singly and doubly (and for Mg, triply) hydrated group 2 metal dications bound to deprotonated uracil were explored in the gas phase using infrared multiple photon dissociation spectroscopy in the mid-infrared region (1000-1900 cm(-1) ) and the O-H/N-H stretching region (2700-3800 cm(-1) ) in a Fourier transform ion cyclotron resonance mass spectrometer. The infrared multiple photon dissociation spectra were then compared with the computed IR spectra for various isomers. Calculations were performed using B3LYP with the 6-31 + G(d,p) basis set for all atoms except Ba(2+) and Sr(2+) , for which the LANL2DZ or the def2-TZVPP basis sets with relativistic core potentials were used. Atoms-in-molecules analysis was conducted for all lowest energy structures. The lowest energy isomers in all cases are those in which the one uracil is deprotonated at the N3 position, and the metal is coordinated to the N3 and O4 of uracil. Regardless of the degree of solvation, all water molecules are bound to the metal ion and participate in a hydrogen bond with a carbonyl of the uracil moiety.
[Mh] Termos MeSH primário: Gases/química
Espectrometria de Massas/métodos
Metais Alcalinoterrosos/química
Uracila/análise
Uracila/química
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Gases); 0 (Metals, Alkaline Earth); 059QF0KO0R (Water); 56HH86ZVCT (Uracil)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160310
[St] Status:MEDLINE
[do] DOI:10.1002/jms.3739


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[PMID]:26926201
[Au] Autor:Oluoti K; Pettersson A; Richards T
[Ad] Endereço:Swedish Centre for Resource Recovery (SCRR), University of Borås, SE-501 90 Borås, Sweden. Electronic address: kehinde.oluoti@hb.se.
[Ti] Título:Investigating the morphology and reactivity of chars from Triplochiton scleroxylon pyrolysed under varied conditions.
[So] Source:Bioresour Technol;208:94-99, 2016 May.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A gasifier may be optimised via a good understanding of the char formation, morphology and reactivity. The effects of varying the pyrolysis pressure and heating rate on the morphology of the char were investigated using a thermogravimetric analyser (TGA), scanning electron microscope (SEM) and micrograph spot analyser. The gasified chars were produced at heating rates of 5, 10 and 20°C/min and pressures of 0.1, 0.4 and 0.6 MPa. All the chars have different degrees of apparent gasification reactivity. The random pore model (RPM) provided a better description of the experiment, with low average error values, θ, in all of the cases considered. The alkaline and alkaline earth metals (AAEM) in the tropical wood biomass Arere (Triplochiton scleroxylon) consist predominantly of calcium and could altogether be partly responsible for the noticeably high reactivity nature of the tropical Arere chars.
[Mh] Termos MeSH primário: Malvaceae/química
Metais Alcalinoterrosos/química
Madeira/química
[Mh] Termos MeSH secundário: Biomassa
Cálcio/análise
Gases
Calefação
Microscopia Eletrônica de Varredura
Modelos Teóricos
Pressão
Termogravimetria
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Gases); 0 (Metals, Alkaline Earth); SY7Q814VUP (Calcium)
[Em] Mês de entrada:1611
[Cu] Atualização por classe:170728
[Lr] Data última revisão:
170728
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160302
[St] Status:MEDLINE


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[PMID]:26864122
[Au] Autor:Bellini C; Dorcet V; Carpentier JF; Tobisch S; Sarazin Y
[Ad] Endereço:Organometallics: Materials and Catalysis Department, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042, Rennes, France.
[Ti] Título:Alkaline-Earth-Catalysed Cross-Dehydrocoupling of Amines and Hydrosilanes: Reactivity Trends, Scope and Mechanism.
[So] Source:Chemistry;22(13):4564-83, 2016 Mar 18.
[Is] ISSN:1521-3765
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Alkaline-earth (Ae=Ca, Sr, Ba) complexes are shown to catalyse the chemoselective cross-dehydrocoupling (CDC) of amines and hydrosilanes. Key trends were delineated in the benchmark couplings of Ph3 SiH with pyrrolidine or tBuNH2 . Ae{E(SiMe3)2}2 â‹…(THF)x (E=N, CH; x=2-3) are more efficient than {N^N}Ae{E(SiMe3)2}â‹…(THF)n (E=N, CH; n=1-2) complexes (where {N^N}(-) ={ArN(o-C6H4)C(H)=NAr}(-) with Ar=2,6-iPr2 -C6H3) bearing an iminoanilide ligand, and alkyl precatalysts are better than amido analogues. Turnover frequencies (TOFs) increase in the order Ca30 products) includes diamines and di(hydrosilane)s. Kinetic analysis of the Ba-promoted CDC of pyrrolidine and Ph3SiH shows that 1) the kinetic law is rate=k[Ba](1) [amine](0) [hydrosilane](1), 2) electron-withdrawing p-substituents on the arylhydrosilane improve the reaction rate and 3) a maximal kinetic isotopic effect (kSiH/kSiD =4.7) is seen for Ph3SiX (X=H, D). DFT calculations identified the prevailing mechanism; instead of an inaccessible σ-bond-breaking metathesis pathway, the CDC appears to follow a stepwise reaction path with N-Si bond-forming nucleophilic attack of the catalytically competent Ba pyrrolide onto the incoming silane, followed by rate limiting hydrogen-atom transfer to barium. The participation of a Ba silyl species is prevented energetically. The reactivity trend Ca
[Mh] Termos MeSH primário: Aminas/química
Metais Alcalinoterrosos/química
Silanos/química
[Mh] Termos MeSH secundário: Aminação
Catálise
Cinética
Ligantes
Modelos Moleculares
Polimerização
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Amines); 0 (Ligands); 0 (Metals, Alkaline Earth); 0 (Silanes)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160212
[St] Status:MEDLINE
[do] DOI:10.1002/chem.201504316


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[PMID]:26849106
[Au] Autor:Gaburjakova J; Gaburjakova M
[Ad] Endereço:Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Health Sciences Pavilion, 840 05, Bratislava, Slovak Republic. Electronic address: jana.gaburjakova@savba.sk.
[Ti] Título:Cardiac ryanodine receptor: Selectivity for alkaline earth metal cations points to the EF-hand nature of luminal binding sites.
[So] Source:Bioelectrochemistry;109:49-56, 2016 Jun.
[Is] ISSN:1878-562X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A growing body of evidence suggests that the regulation of cardiac ryanodine receptor (RYR2) by luminal Ca(2+) is mediated by luminal binding sites located on the RYR2 channel itself and/or its auxiliary protein, calsequestrin. The localization and structure of RYR2-resident binding sites are not known because of the lack of a high-resolution structure of RYR2 luminal regions. To obtain the first structural insight, we probed the RYR2 luminal face stripped of calsequestrin by alkaline earth metal divalents (M(2+): Mg(2+), Ca(2+), Sr(2+) or Ba(2+)). We show that the RYR2 response to caffeine at the single-channel level is significantly modified by the nature of luminal M(2+). Moreover, we performed competition experiments by varying the concentration of luminal M(2+) (Mg(2+), Sr(2+) or Ba(2+)) from 8 mM to 53 mM and investigated its ability to compete with 1mM luminal Ca(2+). We demonstrate that all tested M(2+) bind to exactly the same RYR2 luminal binding sites. Their affinities decrease in the order: Ca(2+)>Sr(2+)>Mg(2+)~Ba(2+), showing a strong correlation with the M(2+) affinity of the EF-hand motif. This indicates that the RYR2 luminal binding regions and the EF-hand motif likely share some structural similarities because the structure ties directly to the function.
[Mh] Termos MeSH primário: Anticonvulsivantes/farmacologia
Cálcio/metabolismo
Metais Alcalinoterrosos/metabolismo
Miocárdio/metabolismo
Fenobarbital/farmacologia
Canal de Liberação de Cálcio do Receptor de Rianodina/metabolismo
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Animais
Anticonvulsivantes/metabolismo
Bário/metabolismo
Sítios de Ligação
Cafeína/farmacologia
Cátions Bivalentes/metabolismo
Estimulantes do Sistema Nervoso Central/farmacologia
Motivos EF Hand
Seres Humanos
Magnésio/metabolismo
Dados de Sequência Molecular
Miocárdio/química
Fenobarbital/metabolismo
Canal de Liberação de Cálcio do Receptor de Rianodina/química
Alinhamento de Sequência
Estrôncio/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Anticonvulsants); 0 (Cations, Divalent); 0 (Central Nervous System Stimulants); 0 (Metals, Alkaline Earth); 0 (Ryanodine Receptor Calcium Release Channel); 24GP945V5T (Barium); 3G6A5W338E (Caffeine); I38ZP9992A (Magnesium); SY7Q814VUP (Calcium); YQE403BP4D (Phenobarbital); YZS2RPE8LE (Strontium)
[Em] Mês de entrada:1611
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160206
[St] Status:MEDLINE


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[PMID]:26327285
[Au] Autor:Johnson RA; Manley OM; Spuches AM; Grossoehme NE
[Ad] Endereço:Department of Chemistry, East Carolina University, Greenville, NC 27858, United States.
[Ti] Título:Dissecting ITC data of metal ions binding to ligands and proteins.
[So] Source:Biochim Biophys Acta;1860(5):892-901, 2016 May.
[Is] ISSN:0006-3002
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: ITC is a powerful technique that can reliably assess the thermodynamic underpinnings of a wide range of binding events. When metal ions are involved, complications arise in evaluating the data due to unavoidable solution chemistry that includes metal speciation and a variety of linked equilibria. SCOPE OF REVIEW: This paper identifies these concerns, provides recommendations to avoid common mistakes, and guides the reader through the mathematical treatment of ITC data to arrive at a set of thermodynamic state functions that describe identical chemical events and, ideally, are independent of solution conditions. Further, common metal chromophores used in biological metal sensing studies are proposed as a robust system to determine unknown solution competition. MAJOR CONCLUSIONS: Metal ions present several complications in ITC experiments. This review presents strategies to avoid these pitfalls and proposes and experimentally validates mathematical approaches to deconvolute complex equilibria that exist in these systems. GENERAL SIGNIFICANCE: This review discusses the wide range of complications that exists in metal-based ITC experiments. It provides a starting point for scientists new to this field and articulates concerns that will help experienced researchers troubleshoot experiments.
[Mh] Termos MeSH primário: Aminoquinolinas/química
Ácido Edético/química
Fura-2/análogos & derivados
Metais Alcalinoterrosos/química
Proteínas/química
[Mh] Termos MeSH secundário: Sítios de Ligação
Calorimetria
Cátions Bivalentes
Fura-2/química
Seres Humanos
Cinética
Ligantes
Modelos Químicos
Ligação Proteica
Termodinâmica
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; REVIEW
[Nm] Nome de substância:
0 (Aminoquinolines); 0 (Cations, Divalent); 0 (Ligands); 0 (Metals, Alkaline Earth); 0 (Proteins); 120551-15-7 (2-(2-(5-carboxy)oxazole)-5-hydroxy-6-aminobenzofuran-N,N,O-triacetic acid); 9G34HU7RV0 (Edetic Acid); O448IDK23O (Quin2); TSN3DL106G (Fura-2)
[Em] Mês de entrada:1606
[Cu] Atualização por classe:170802
[Lr] Data última revisão:
170802
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150902
[St] Status:MEDLINE


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[PMID]:26277654
[Au] Autor:Medley P; Bollhöfer A
[Ad] Endereço:Environmental Research Institute of the Supervising Scientist (eriss), Darwin, NT 0810, Australia. Electronic address: peter.medley@environment.gov.au.
[Ti] Título:Influence of group II metals on Radium-226 concentration ratios in the native green plum (Buchanania obovata) from the Alligator Rivers Region, Northern Territory, Australia.
[So] Source:J Environ Radioact;151 Pt 3:551-7, 2016 Jan.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In this study, uptake of Ra from soil, and the influence of group II metals on Ra uptake, into the stones and edible flesh of the fruit of the wild green plum, Buchanania obovata, was investigated. Selective extraction of the exchangeable fraction of the soil samples was undertaken but was not shown to more reliably predict Ra uptake than total soil Ra activity concentration. Comparison of the group II metal to Ca ratios (i.e. Sr/Ca, Ba/Ca, Ra/Ca) in the flesh with exchangeable Ca shows that Ca outcompetes group II metals for root uptake and that the uptake pathway discriminated against group II metals relative to ionic radius, with uptake of Ca > Sr > Ba >> Ra. Flesh and stone analysis showed that movement of group II metals to these components of the plant, after root uptake, was strongly related. This supports the hypothesis that Sr, Ba and Ra are being taken up as analogue elements, and follow the same uptake and translocation pathways, with Ca. Comparison with previously reported data from a native passion fruit supports the use of total soil CRs on natural, undisturbed sites. As exchangeable CRs for Ra reach a saturation value it may be possible to make more precise predictions using selective extraction techniques for contaminated or disturbed sites.
[Mh] Termos MeSH primário: Anacardiaceae/metabolismo
Metais Alcalinoterrosos/metabolismo
Rádio (Elemento)/metabolismo
Poluentes Radioativos do Solo/metabolismo
[Mh] Termos MeSH secundário: Bário/metabolismo
Cálcio/metabolismo
Northern Territory
Estrôncio/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Alkaline Earth); 0 (Soil Pollutants, Radioactive); 24GP945V5T (Barium); SY7Q814VUP (Calcium); W90AYD6R3Q (Radium); YZS2RPE8LE (Strontium)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:151217
[Lr] Data última revisão:
151217
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150817
[St] Status:MEDLINE



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