Base de dados : MEDLINE
Pesquisa : D01.475 [Categoria DeCS]
Referências encontradas : 551 [refinar]
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[PMID]:28454008
[Au] Autor:Zhao X; Ma J; von Gunten U
[Ad] Endereço:State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, CH-8600 Dübendorf, Switzerland.
[Ti] Título:Reactions of hypoiodous acid with model compounds and the formation of iodoform in absence/presence of permanganate.
[So] Source:Water Res;119:126-135, 2017 08 01.
[Is] ISSN:1879-2448
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The kinetics for the reactions of hypoiodous acid (HOI) with various phenols (phenol, 4-nitrophenol, 4-hydroxybenzoic acid), 3-oxopentanedioic acid (3-OPA) and flavone were investigated in the pH range of 6.0-11.0. The apparent second order rate constants for the reactions of HOI with phenolic compounds, 3-OPA, flavone and citric acid at pH 8.0 are 10-10 M s , (4.0 ± 0.3) × 10 M s , (2.5 ± 0.2) × 10 M s and <1 M s , respectively. The effect of buffer type and concentration was investigated with acetate, phosphate and borate. All tested buffers promote the HOI reactions with phenols. The percentage of iodine incorporation for various (hydroxyl)phenolic compounds and two NOM extracts ranges from 5% to 98%, indicating that electrophilic aromatic substitution and/or electron transfer can occur. The extent of these reactions depends on the number and relative position of the hydroxyl moieties on the phenolic compounds. Iodoform formation rates increase with increasing pH and iodoform yields increase from 9% to 67% for pH 6.0-10.0 for the HOI/3-OPA reactions. In the permanganate/HOI/3-OPA and permanganate/iodide/3-OPA system at pH < 8.0, iodoform formation is elevated compared to the HOI/3-OPA system in absence of permanganate. For pH > 8.0, in presence of permanganate, iodoform formation is significantly inhibited and iodate formation enhanced, which is due to a faster permanganate-mediated HOI disproportionation to iodate compared to the iodination process. The production of reactive iodine in real waters containing iodide in contact with permanganate may lead to the formation of iodinated organic compounds.
[Mh] Termos MeSH primário: Compostos de Iodo/química
Compostos de Manganês/química
Óxidos/química
Purificação da Água
[Mh] Termos MeSH secundário: Hidrocarbonetos Iodados
Concentração de Íons de Hidrogênio
Cinética
Oxirredução
Poluentes Químicos da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Hydrocarbons, Iodinated); 0 (Iodine Compounds); 0 (Manganese Compounds); 0 (Oxides); 0 (Water Pollutants, Chemical); 14333-13-2 (permanganic acid); 2PYC923C5W (hypoiodous acid); KXI2J76489 (iodoform)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171204
[Lr] Data última revisão:
171204
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


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[PMID]:28865213
[Au] Autor:Fuentes R; Veuthey C; Arias A; Saravia D; Ottone NE
[Ad] Endereço:.
[Ti] Título:Injection in temporomandibular joint of rats. Description of technical protocol.
[So] Source:Pol J Vet Sci;20(2):207-211, 2017 Mar 01.
[Is] ISSN:1505-1773
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The development of animal models for research has been very diffused. Osteoarthritis is a joint degenerative pathology that induces cartilage erosion, chondrocyte proliferation and osteophyte formation. The aim of this paper is to present a technical procedure to perform the injection of monosodium iodine acetate in the temporomandibular joints of rats to generate osteoarthritis and to contribute to future research analysis related to pathology progression and proper treatment performance. The use of rat models may be a complex process because of their size, but they can be compared to the human temporomandibular joint due to the similar characteristics and the possibility of performing diagnosis and treatment protocols in order to detect this pathology.
[Mh] Termos MeSH primário: Modelos Animais de Doenças
Injeções Intra-Articulares/métodos
Compostos de Iodo/toxicidade
Osteoartrite/induzido quimicamente
Articulação Temporomandibular/anatomia & histologia
[Mh] Termos MeSH secundário: Animais
Ratos
Ratos Sprague-Dawley
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Iodine Compounds)
[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:170903
[St] Status:MEDLINE


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[PMID]:28287916
[Au] Autor:Sahbaee P; Abadi E; Segars WP; Marin D; Nelson RC; Samei E
[Ad] Endereço:From the Carl E. Ravin Advanced Imaging Laboratories, Department of Radiology, Duke University Medical Center, 2424 Erwin Rd, Suite 302, Durham, NC 27705 (P.S., E.A., W.P.S., D.M., R.C.N., E.S.); and Department of Physics, North Carolina State University, Raleigh, NC (P.S.).
[Ti] Título:The Effect of Contrast Material on Radiation Dose at CT: Part II. A Systematic Evaluation across 58 Patient Models.
[So] Source:Radiology;283(3):749-757, 2017 Jun.
[Is] ISSN:1527-1315
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Purpose To estimate the radiation dose as a result of contrast medium administration in a typical abdominal computed tomographic (CT) examination across a library of contrast material-enhanced computational patient models. Materials and Methods In part II of this study, first, the technique described in part I of this study was applied to enhance the extended cardiac-torso models with patient-specific iodine-time profiles reflecting the administration of contrast material. Second, the patient models were deployed to assess the patient-specific organ dose as a function of time in a typical abdominal CT examination using Monte Carlo simulation. In this hypothesis-generating study, organ dose refers to the total energy deposited in the unit mass of the tissue inclusive of iodine. Third, a study was performed as a strategy to anticipate the biologically relevant dose (absorbed dose to tissue) in highly perfused organs such as the liver and kidney. The time-varying organ-dose increment values relative to those for unenhanced CT examinations were reported. Results The results from the patient models subjected to the injection protocol indicated up to a total 53%, 30%, 35%, 54%, 27%, 18%, 17%, and 24% increase in radiation dose delivered to the heart, spleen, liver, kidneys, stomach, colon, small intestine, and pancreas, respectively. The biologically relevant dose increase with respect to the dose at an unenhanced CT examination was in the range of 0%-18% increase for the liver and 27% for the kidney across 58 patient models. Conclusion The administration of contrast medium increases the total radiation dose. However, radiation dose, while relevant to be included in estimating the risk associated with contrast-enhanced CT, may still not fully characterize the total biologic effects. Therefore, given the fact that many CT diagnostic decisions would be impossible without the use of iodine, this study suggests the need to consider the effect of iodinated contrast material on the organ doses to patients undergoing CT studies when designing CT protocols. RSNA, 2017 Online supplemental material is available for this article.
[Mh] Termos MeSH primário: Meios de Contraste/farmacocinética
Dose de Radiação
Tomografia Computadorizada por Raios X/métodos
[Mh] Termos MeSH secundário: Adulto
Feminino
Seres Humanos
Compostos de Iodo/farmacocinética
Masculino
Modelos Biológicos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Contrast Media); 0 (Iodine Compounds)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170616
[Lr] Data última revisão:
170616
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170314
[St] Status:MEDLINE
[do] DOI:10.1148/radiol.2017152852


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[PMID]:27918709
[Au] Autor:Muenzel D; Bar-Ness D; Roessl E; Blevis I; Bartels M; Fingerle AA; Ruschke S; Coulon P; Daerr H; Kopp FK; Brendel B; Thran A; Rokni M; Herzen J; Boussel L; Pfeiffer F; Proksa R; Rummeny EJ; Douek P; Noël PB
[Ad] Endereço:From the Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, der Technischen Universität München, Ismaningerstr 22, 81675 Munich, Germany (D.M., A.A.F., S.R., F.K.K., F.P., E.J.R., P.B.N.); Department of Interventional Radiology and Cardio-vascular and Thoracic Diagnosti
[Ti] Título:Spectral Photon-counting CT: Initial Experience with Dual-Contrast Agent K-Edge Colonography.
[So] Source:Radiology;283(3):723-728, 2017 Jun.
[Is] ISSN:1527-1315
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Purpose To investigate the feasibility of using spectral photon-counting computed tomography (CT) to differentiate between gadolinium-based and nonionic iodine-based contrast material in a colon phantom by using the characteristic k edge of gadolinium. Materials and Methods A custom-made colon phantom was filled with nonionic iodine-based contrast material, and a gadolinium-filled capsule representing a contrast material-enhanced polyp was positioned on the colon wall. The colon phantom was scanned with a preclinical spectral photon-counting CT system to obtain spectral and conventional data. By fully using the multibin spectral information, material decomposition was performed to generate iodine and gadolinium maps. Quantitative measurements were performed within the lumen and polyp to quantitatively determine the absolute content of iodine and gadolinium. Results In a conventional CT section, absorption values of both contrast agents were similar at approximately 110 HU. Contrast material maps clearly differentiated the distributions, with gadolinium solely in the polyp and iodine in the lumen of the colon. Quantitative measurements of contrast material concentrations in the colon and polyp matched well with those of actual prepared mixtures. Conclusion Dual-contrast spectral photon-counting CT colonography with iodine-filled lumen and gadolinium-tagged polyps may enable ready differentiation between polyps and tagged fecal material. RSNA, 2016.
[Mh] Termos MeSH primário: Colonografia Tomográfica Computadorizada
[Mh] Termos MeSH secundário: Colonografia Tomográfica Computadorizada/métodos
Meios de Contraste
Gadolínio
Compostos de Iodo
Imagens de Fantasmas
Fótons
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Contrast Media); 0 (Iodine Compounds); AU0V1LM3JT (Gadolinium)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170615
[Lr] Data última revisão:
170615
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:161206
[St] Status:MEDLINE
[do] DOI:10.1148/radiol.2016160890


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[PMID]:27836169
[Au] Autor:Sayess R; Reckhow DA
[Ad] Endereço:Department of Environmental and Water Resources Engineering, University of Massachusetts, Amherst, 01003, United States. Electronic address: rasilsayess@gmail.com.
[Ti] Título:An improved method for total organic iodine in drinking water.
[So] Source:Water Res;108:250-259, 2017 Jan 01.
[Is] ISSN:1879-2448
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A concise, rapid, and sensitive method is developed to measure organically-bound iodine in water. Total organic iodine (TOI) is used as an integrative surrogate that reflects the amount of iodinated organics in a water sample and is quantified using a refined method that builds on previous adsorption and detection approaches. The proposed method combines adsorption, combustion, and trapping of combustion products, with an offline inductively coupled plasma/mass spectrometer (ICP-MS) for iodide detection. During method development, three analytical variables (factors) were varied across two levels each in order to optimize the method for iodine recovery: 1) the sample pH prior to adsorption on the granular activated carbon (GAC); 2) the amount of base addition to the trap solution; and 3) composition of the ICP-MS wash solution. These factors were tested with solutions of eight iodinated model organic compounds, two iodinated inorganic compounds, and field water samples using a full factorial experimental design. An analysis of variance (ANOVA) and related statistical methods were deployed to identify the best combination of conditions (i.e., treatment) that results in the most complete recovery of iodine from the model compounds and the highest rejection of inorganic iodine. The chosen treatment for TOI measurement incorporates a sample pH of less than 1 prior to adsorption onto the GAC, a solution of 2% (v/v) tetramethyl ammonium hydroxide (TMAH) for trapping of combustion products, and a TMAH wash solution of 0.1% (v/v) for the ICP-MS.
[Mh] Termos MeSH primário: Água Potável
Iodo/química
[Mh] Termos MeSH secundário: Iodetos
Compostos de Iodo
Espectrometria de Massas
Poluentes Químicos da Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drinking Water); 0 (Iodides); 0 (Iodine Compounds); 0 (Water Pollutants, Chemical); 9679TC07X4 (Iodine)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170505
[Lr] Data última revisão:
170505
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161113
[St] Status:MEDLINE


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[PMID]:27999227
[Au] Autor:Moleti M; Sturniolo G; Trimarchi F; Vermiglio F
[Ad] Endereço:Dipartimento di Medicina Clinica e Sperimentale, Università di Messina, Messina, Italy.
[Ti] Título:The changing phenotype of iodine deficiency disorders: a review of thirty-five years of research in north-eastern Sicily.
[So] Source:Ann Ist Super Sanita;52(4):550-557, 2016 Oct-Dec.
[Is] ISSN:0021-2571
[Cp] País de publicação:Italy
[La] Idioma:eng
[Ab] Resumo:Iodine deficiency disorders (IDD) still represent a major public health problem, with almost 30% of the world population being exposed to the consequences of nutritional iodine deficiency (ID). In Italy, despite a sustained policy of iodine prophylaxis, more than 10% of people is still affected with goiter, and a presumably higher rate of subjects may suffer from minor cognitive deficits due to inadequate iodine supply during antenatal life. This review of systematic observational studies carried out over thirty-five years (1980-2015) in a sentinel ID area in North-eastern Sicily highlights the changing phenotypes of IDD in this region. Over the years profound improvements in nutritional iodine status in North-eastern Sicily has occurred, due to both silent and active iodine prophylaxis. Endemic cretinism, resulting from severe iodine deficiency, has been progressively replaced by less serious deficits of intellectual and cognitive abilities, which nevertheless deserve proper attention.
[Mh] Termos MeSH primário: Deficiências Nutricionais/epidemiologia
Iodo/deficiência
[Mh] Termos MeSH secundário: Hipotireoidismo Congênito/epidemiologia
Deficiências Nutricionais/dietoterapia
Seres Humanos
Compostos de Iodo/uso terapêutico
Fenótipo
Sicília/epidemiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Iodine Compounds); 9679TC07X4 (Iodine)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170418
[Lr] Data última revisão:
170418
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161222
[St] Status:MEDLINE
[do] DOI:10.4415/ANN_16_04_15


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[PMID]:27885199
[Au] Autor:Horikawa T
[Ad] Endereço:Ueda Dermatology Clinic.
[Ti] Título:DRUG-INDUCED ANAPHYLAXIS.
[So] Source:Arerugi;65(9):1171-1176, 2016.
[Is] ISSN:0021-4884
[Cp] País de publicação:Japan
[La] Idioma:jpn
[Mh] Termos MeSH primário: Anafilaxia/induzido quimicamente
Hipersensibilidade a Drogas
[Mh] Termos MeSH secundário: Anafilaxia/terapia
Antibacterianos/efeitos adversos
Antibacterianos/química
Anti-Inflamatórios não Esteroides/efeitos adversos
Antineoplásicos/efeitos adversos
Meios de Contraste/efeitos adversos
Hipersensibilidade a Drogas/terapia
Seres Humanos
Compostos de Iodo/efeitos adversos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Anti-Inflammatory Agents, Non-Steroidal); 0 (Antineoplastic Agents); 0 (Contrast Media); 0 (Iodine Compounds)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171011
[Lr] Data última revisão:
171011
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161126
[St] Status:MEDLINE


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[PMID]:27821094
[Au] Autor:Aubry P; Brillet G; Catella L; Schmidt A; Bénard S
[Ad] Endereço:Hôpital Bichat-Claude Bernard, Paris, France.
[Ti] Título:Outcomes, risk factors and health burden of contrast-induced acute kidney injury: an observational study of one million hospitalizations with image-guided cardiovascular procedures.
[So] Source:BMC Nephrol;17(1):167, 2016 11 08.
[Is] ISSN:1471-2369
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Despite the use of low-osmolar contrast media that have significantly reduced the occurrence of severe adverse reactions, contrast-induced (CI) acute kidney injury (AKI) remains the third cause of AKI in hospitals. We sought to estimate the frequency of CI-AKI among hospitalized patients undergoing image-guided cardiovascular procedures, to quantify the effect of risk factors on the development of this complication and to assess relative organizational and economic burden in healthcare. METHODS: A retrospective cross-sectional population-based study using the extensive French hospital discharge database (PMSI) was carried out. Hospitalizations with image-guided cardiovascular procedures using a contrast media were identified in adults over a 2-year period (2012-2013). Suspected CI-AKI was defined as the presence, during hospitalization, of a diagnostic code of AKI (International Classification of Diseases, 10th revision [ICD-10] codes: N141, 142, N144, N990, N17, N19 or R392) or a code of renal replacement therapy procedure (Classification Commune des Actes Médicaux [CCAM] codes: JVJB001, JVJF002-005 and JVJF008) as creatinine criteria were not available. RESULTS: During 1,047,329 hospitalizations studied, 32,308 suspected CI-AKI were observed, yielding a frequency of 3.1 %. By multivariate analysis, factors that significantly increased the risk of suspected CI-AKI included cardiogenic shock (odds ratio [OR] = 20.5, 95 % confidence interval [95 % CI] [18.7; 22.5]), acute heart failure (OR = 2.5, 95 % CI [2.4; 2.6]) and chronic kidney disease (OR = 2.3, 95 % CI [2.2; 2.3]. Renal replacement therapy was initiated during 6,335 (0.6 %) hospitalizations. The mean length of stay and cost of hospitalizations associated with suspected CI-AKI was higher than in hospitalizations without suspected CI-AKI (20.5 vs 4.7 days, p < 0.00001 and €15,765 vs €3,352, p < 0.0001, respectively). CONCLUSIONS: This is the first large-scale population-based study to estimate frequency and health burden of suspected CI-AKI occurring after image-guided cardiovascular procedures, and the first available data in a French population. We showed that this iatrogenic complication remains of high concern despite prevention efforts and contrast media product improvement. From our results, suspected CI-AKI is associated with particularly high mortality, significantly extends hospitalizations, and leads to additional costs reaching a total of €200M per year.
[Mh] Termos MeSH primário: Lesão Renal Aguda/induzido quimicamente
Lesão Renal Aguda/epidemiologia
Meios de Contraste/efeitos adversos
Custos de Cuidados de Saúde
Hospitalização/economia
Compostos de Iodo/efeitos adversos
[Mh] Termos MeSH secundário: Doença Aguda
Lesão Renal Aguda/economia
Lesão Renal Aguda/terapia
Idoso
Idoso de 80 Anos ou mais
Procedimentos Cirúrgicos Cardiovasculares/estatística & dados numéricos
Estudos Transversais
Diabetes Mellitus/epidemiologia
Feminino
França/epidemiologia
Insuficiência Cardíaca/epidemiologia
Hospitalização/estatística & dados numéricos
Seres Humanos
Incidência
Tempo de Internação/estatística & dados numéricos
Masculino
Meia-Idade
Radiologia Intervencionista
Insuficiência Renal Crônica/epidemiologia
Terapia de Substituição Renal
Estudos Retrospectivos
Fatores de Risco
Choque Cardiogênico/epidemiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; OBSERVATIONAL STUDY; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Contrast Media); 0 (Iodine Compounds)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171120
[Lr] Data última revisão:
171120
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161109
[St] Status:MEDLINE


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[PMID]:27794161
[Au] Autor:Bin-Shuwaish MS
[Ad] Endereço:Department of Restorative Dental Sciences, College of Dentistry King Saud University, Riyadh, Kingdom of Saudi Arabia, e-mail: malshowaish@ksu.edu.sa.
[Ti] Título:Effects and Effectiveness of Cavity Disinfectants in Operative Dentistry: A Literature Review.
[So] Source:J Contemp Dent Pract;17(10):867-879, 2016 Oct 01.
[Is] ISSN:1526-3711
[Cp] País de publicação:India
[La] Idioma:eng
[Ab] Resumo:The degree of success in the elimination of bacteria during cavity preparation and prior to the insertion of a restoration may increase the longevity of the restoration and therefore the success of the restorative procedure. The complete eradication of bacteria in a caries-affected tooth, during cavity preparation, is considered a difficult clinical task. In addition to weakening the tooth structure, attempts to excavate extensive carious tissue completely, by only mechanical procedures, may affect the vitality of the pulp. Therefore, disinfection of the cavity preparation after caries excavation can aid in the elimination of bacterial remnants that can be responsible for recurrent caries, postoperative sensitivity, and failure of the restoration. However, the effects of disinfectants on the restorative treatment have been a major concern for dental clinicians and researchers. This review aims to explore existing literature and provide information about different materials and techniques that have been used for disinfecting cavity preparations and their effects and effectiveness in operative dentistry and, therefore, helps dental practitioners with clinical decision to use cavity disinfectants during restorative procedures. Antimicrobial effectiveness and effects on the pulp and dental restorations, in addition to possible side effects, were all reviewed in this paper.
[Mh] Termos MeSH primário: Preparo da Cavidade Dentária
Dentística Operatória
Desinfetantes/farmacologia
Procedimentos Cirúrgicos Bucais
[Mh] Termos MeSH secundário: Compostos de Benzalcônio/farmacologia
Clorexidina/análogos & derivados
Clorexidina/farmacologia
Polpa Dentária/efeitos dos fármacos
Compostos de Iodo/farmacologia
Lasers
Morinda
Oxidantes Fotoquímicos/farmacologia
Ozônio/farmacologia
Extratos Vegetais/farmacologia
Própole
Salvadoraceae
Hipoclorito de Sódio/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Benzalkonium Compounds); 0 (Disinfectants); 0 (Iodine Compounds); 0 (Oxidants, Photochemical); 0 (Plant Extracts); 66H7ZZK23N (Ozone); 9009-62-5 (Propolis); DY38VHM5OD (Sodium Hypochlorite); MOR84MUD8E (chlorhexidine gluconate); R4KO0DY52L (Chlorhexidine)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171024
[Lr] Data última revisão:
171024
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:161030
[St] Status:MEDLINE


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[PMID]:27611727
[Au] Autor:Peng H; Chen C; Cantin J; Saunders DM; Sun J; Tang S; Codling G; Hecker M; Wiseman S; Jones PD; Li A; Rockne KJ; Sturchio NC; Cai M; Giesy JP
[Ad] Endereço:Toxicology Centre, University of Saskatchewan , 44 Campus Drive, Saskatoon, Saskatchewan S7N 5B3, Canada.
[Ti] Título:Untargeted Screening and Distribution of Organo-Iodine Compounds in Sediments from Lake Michigan and the Arctic Ocean.
[So] Source:Environ Sci Technol;50(18):10097-105, 2016 Sep 20.
[Is] ISSN:1520-5851
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The majority of halogenated organic compounds present in the environment remain unidentified. To address this data gap, we recently developed an untargeted method (data-independent precursor isolation and characteristic fragment; DIPIC-Frag) for identification of unknown organo-bromine compounds. In this study, the method was adapted to enable untargeted screening of natural and synthetic organo-iodine compounds (NSOICs) in sediments. A total of 4,238 NSOIC peaks were detected in sediments from Lake Michigan. Precursor ions and formulas were determined for 2,991 (71%) of the NSOIC peaks. These compounds exhibited variations in abundances (<10(3) to ∼10(7)), m/z values (206.9304-996.9474), retention times (1.0-29.7 min), and number of iodine atoms (1-4). Hierarchical cluster analysis showed that sediments in closer proximity exhibited similar profiles of NSOICs. NSOICs were screened in 10 samples of sediment from the Arctic Ocean to compare the profiles of NSOICs between freshwater and marine sediments. A total of 3,168 NSOIC peaks were detected, and profiles of NSOICs in marine sediments were clearly distinct from Lake Michigan. The coexistence of brominated and iodinated analogues indicated that some NSOICs are of natural origin. Different ratios of abundances of iodinated compounds to brominated analogues were observed and proposed as a marker to distinguish sources of NSOICs.
[Mh] Termos MeSH primário: Sedimentos Geológicos
Lagos
[Mh] Termos MeSH secundário: Compostos de Iodo
Michigan
Oceanos e Mares
Poluentes Químicos da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Iodine Compounds); 0 (Water Pollutants, Chemical)
[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:160910
[St] Status:MEDLINE
[do] DOI:10.1021/acs.est.6b03221



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