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[PMID]:29346398
[Au] Autor:Martinez-Andrade JM; Avalos-Borja M; Vilchis-Nestor AR; Sanchez-Vargas LO; Castro-Longoria E
[Ad] Endereço:Departamento de Microbiología, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California, México.
[Ti] Título:Dual function of EDTA with silver nanoparticles for root canal treatment-A novel modification.
[So] Source:PLoS One;13(1):e0190866, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The chelating and antimicrobial capacity of a novel modification of 17% EDTA with silver nanoparticles (AgNPs) (EDTA-AgNPs) was evaluated in-vitro for root canal treatment (RCT). The EDTA-AgNPs solution was characterized by UV-Vis spectroscopy, ζ-potential and high-resolution transmission electron microscopy (HRTEM). Antimicrobial capacity was evaluated against Candida albicans and Staphylococcus aureus in planktonic and biofilm cells by broth macrodilution (24 h) and XTT assays, (1, 10 and 30 min) respectively. The chelating capacity of EDTA-AgNPs was assessed indirectly (smear layer removal) and directly (demineralizing effect) in bovine dentin at two silver concentrations, 16 and 512 µg/ml at 1 and 10 minutes of exposure time. Smear layer removal was evaluated by atomic force microscopy (AFM) and scanning electron microscopy (SEM). The demineralizing effect was determined by atomic absorption spectroscopy (AAS), microhardness test (MH) and X-ray diffractometer (XRD). Synthesized AgNPs were quasi-spherical in shape with an average size of 13.09 ± 8.05 nm. 17% EDTA-AgNPs was effective to inhibit C. albicans and S. aureus in planktonic and biofilm cultures. The smear layer removal and demineralizing effect were similar between 17% EDTA-AgNPs and 17% EDTA treatments. The 17% EDTA-AgNPs solution proved to be an effective antimicrobial agent, and has a similar chelating capacity to 17% EDTA alone. These in-vitro studies strongly suggest that EDTA-AgNPs could be used for effective smear layer removal, having an antimicrobial effect at the same time during RCT.
[Mh] Termos MeSH primário: Ácido Edético/química
Nanopartículas Metálicas/química
Tratamento do Canal Radicular
Prata/química
[Mh] Termos MeSH secundário: Animais
Biofilmes/efeitos dos fármacos
Candida albicans/efeitos dos fármacos
Bovinos
Testes de Sensibilidade Microbiana
Microscopia de Força Atômica
Microscopia Eletrônica de Varredura
Prata/farmacologia
Espectrofotometria Atômica
Staphylococcus aureus/efeitos dos fármacos
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
3M4G523W1G (Silver); 9G34HU7RV0 (Edetic Acid)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180221
[Lr] Data última revisão:
180221
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180119
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190866


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[PMID]:29342194
[Au] Autor:Frouin J; Languillaume A; Mas J; Mieulet D; Boisnard A; Labeyrie A; Bettembourg M; Bureau C; Lorenzini E; Portefaix M; Turquay P; Vernet A; Périn C; Ahmadi N; Courtois B
[Ad] Endereço:Centre de coopération internationale en recherche agronomique pour le développement, Unité mixte de recherche Amélioration génétique et adaptation des plantes méditerranéennes et tropicales, Montpellier, France.
[Ti] Título:Tolerance to mild salinity stress in japonica rice: A genome-wide association mapping study highlights calcium signaling and metabolism genes.
[So] Source:PLoS One;13(1):e0190964, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Salinity tolerance is an important quality for European rice grown in river deltas. We evaluated the salinity tolerance of a panel of 235 temperate japonica rice accessions genotyped with 30,000 SNP markers. The panel was exposed to mild salt stress (50 mM NaCl; conductivity of 6 dS m-1) at the seedling stage. Eight different root and shoot growth parameters were measured for both the control and stressed treatments. The Na+ and K+ mass fractions of the stressed plants were measured using atomic absorption spectroscopy. The salt treatment affected plant growth, particularly the shoot parameters. The panel showed a wide range of Na+/K+ ratio and the temperate accessions were distributed over an increasing axis, from the most resistant to the most susceptible checks. We conducted a genome-wide association study on indices of stress response and ion mass fractions in the leaves using a classical mixed model controlling structure and kinship. A total of 27 QTLs validated by sub-sampling were identified. For indices of stress responses, we also used another model that focused on marker × treatment interactions and detected 50 QTLs, three of which were also identified using the classical method. We compared the positions of the significant QTLs to those of approximately 300 genes that play a role in rice salt tolerance. The positions of several QTLs were close to those of genes involved in calcium signaling and metabolism, while other QTLs were close to those of kinases. These results reveal the salinity tolerance of accessions with a temperate japonica background. Although the detected QTLs must be confirmed by other approaches, the number of associations linked to candidate genes involved in calcium-mediated ion homeostasis highlights pathways to explore in priority to understand the salinity tolerance of temperate rice.
[Mh] Termos MeSH primário: Adaptação Fisiológica
Sinalização do Cálcio/genética
Genes de Plantas
Estudo de Associação Genômica Ampla
Oryza/fisiologia
Salinidade
Estresse Fisiológico
[Mh] Termos MeSH secundário: Oryza/genética
Oryza/metabolismo
Locos de Características Quantitativas
Espectrofotometria Atômica
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180221
[Lr] Data última revisão:
180221
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190964


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[PMID]:28466011
[Au] Autor:Gao Z; Cao J; Yan J; Wang J; Cai S; Yan C
[Ad] Endereço:Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
[Ti] Título:Blood Lead Levels and Risk Factors among Preschool Children in a Lead Polluted Area in Taizhou, China.
[So] Source:Biomed Res Int;2017:4934198, 2017.
[Is] ISSN:2314-6141
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:. To determine the blood lead levels and identify related risk factors among preschool children in a lead polluted area (Taizhou, China) and provide theoretical support for prevention of lead pollution. . A stratified-clustered-random sampling method was used to determine the survey sample. Blood lead levels were determined by the tungsten atomizer absorption spectrophotometer. . A total of 2,018 subjects (average age of 59 months; 1,087 boys and 931 girls) were included. The arithmetic mean, geometric mean, and median blood lead levels of the preschool children were 56.4 g/L, 48.9 g/L, and 46 g/L. A total of 8.8% children had blood lead levels >100 g/L and 43.9% had blood lead levels >50 g/L. Mother's education level, father's occupation, decorative tableware, exposure to makeup, and the residential floor were all risk factors for elevated blood lead levels (odds ratios of 1.42, 1.21, 1.11, 1.19, and 1.27, resp.), while hand washing before eating food was a protective factor (odds ratio of 0.88). . The blood lead levels of preschool children in Taizhou were higher than in other areas in China and in developed countries. Therefore, policies ensuring lead-based industries are not placed in close proximity to residential areas are required.
[Mh] Termos MeSH primário: Poluição Ambiental/efeitos adversos
Intoxicação por Chumbo/sangue
Chumbo/sangue
[Mh] Termos MeSH secundário: Criança
Pré-Escolar
China
Feminino
Seres Humanos
Intoxicação por Chumbo/epidemiologia
Intoxicação por Chumbo/patologia
Masculino
Fatores de Risco
Espectrofotometria Atômica
Inquéritos e Questionários
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
2P299V784P (Lead)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180216
[Lr] Data última revisão:
180216
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170504
[St] Status:MEDLINE
[do] DOI:10.1155/2017/4934198


  4 / 14312 MEDLINE  
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[PMID]:29284234
[Au] Autor:Kubaszewski L; Ziola-Frankowska A; Gasik Z; Frankowski M; Dabrowski M; Molisak B; Kaczmarczyk J; Gasik R
[Ad] Endereço:Department of Orthopaedic and Traumatology, W. Dega University Hospital, University of Medical Sciences, Poznan, Poland. eklinika@o2.pl.
[Ti] Título:Chemometric evaluation of concentrations of trace elements in intervertebral disc tissue in patient with degenerative disc disease.
[So] Source:Ann Agric Environ Med;24(4):610-617, 2017 Dec 23.
[Is] ISSN:1898-2263
[Cp] País de publicação:Poland
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The work is designed to uncover the pattern of mutual relation among trace elements and epidemiological data in the degenerated intervertebral disk tissue in humans. Hitherto the reason of the degenerative process is not fully understood. Trace elements are the basic components of the biological compound related both its metabolism as well as environmental exposure. The relation pattern among elements occurs gives new perspective in solving the cause of the disease. MATERIAL AND METHODS: We have analysed trace elements content in the 30 intervertebral disc from 22 patients with degenerative disc disease. The concentrations of Al, Cu, Cd, Mo, Ni and Pb were determined with Atomic Absorption Spectrometry. To analyse the multidimentional relation between trace element concentration and epidemiological data the chemometric analysis was applied. RESULTS: The similarity have been shown in occurrence of following pairs: Cd-Mo as well as Mg-Zn. The second pair was correlated with Pb concentration. Pb levels are observed to be competitive to Cu concentration. Cd concentration was related to Zn and Mg deficiency. No single but rather cluster of epidemiological data show observable influence on the TE tissue variance. Zn and Cu was related to the male sex. Operation with orthopedic implants were related to combined Al, Mo and Zn concentration. CONCLUSIONS: This is the first chemometric analysis of trace elements in disk tissue. It shows multidimentional relations that are missed by the classical statistic. The analysis shows significant relation. The nature of the relations is the basis for further metabolic and environmental research.
[Mh] Termos MeSH primário: Degeneração do Disco Intervertebral/metabolismo
Disco Intervertebral/química
Oligoelementos/análise
[Mh] Termos MeSH secundário: Adulto
Alumínio/análise
Alumínio/metabolismo
Cobre/análise
Cobre/metabolismo
Feminino
Seres Humanos
Disco Intervertebral/metabolismo
Chumbo/análise
Chumbo/metabolismo
Masculino
Meia-Idade
Espectrofotometria Atômica
Oligoelementos/metabolismo
Zinco/análise
Zinco/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Trace Elements); 2P299V784P (Lead); 789U1901C5 (Copper); CPD4NFA903 (Aluminum); J41CSQ7QDS (Zinc)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180105
[Lr] Data última revisão:
180105
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171230
[St] Status:MEDLINE


  5 / 14312 MEDLINE  
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[PMID]:29180288
[Au] Autor:Chalansonnet M; Carabin N; Boucard S; Merlen L; Melczer M; Antoine G; Devoy J; Remy A; Gagnaire F
[Ad] Endereço:INRS, Département Toxicologie et Biométrologie, Rue du Morvan, CS 60027, F-54519, VandÅ“uvre-lès-Nancy, France. Electronic address: monique.chalansonnet@inrs.fr.
[Ti] Título:Study of potential transfer of aluminum to the brain via the olfactory pathway.
[So] Source:Toxicol Lett;283:77-85, 2018 Feb.
[Is] ISSN:1879-3169
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Many employees in the aluminum industry are exposed to a range of aluminum compounds by inhalation, and the presence of ultrafine particles in the workplace has become a concern to occupational health professionals. Some metal salts and metal oxides have been shown to enter the brain through the olfactory route, bypassing the blood-brain barrier, but few studies have examined whether aluminum compounds also use this pathway. In this context, we sought to determine whether aluminum was found in rat olfactory bulbs and whether its transfer depended on physicochemical characteristics such as solubility and granulometry. Aluminum salts (chloride and fluoride) and various nanometric aluminum oxides (13nm, 20nm and 40-50nm) were administered to rats by intranasal instillation through one nostril (10µg Al/30µL for 10days). Olfactory bulbs (ipsilateral and contralateral relative to instilled nostril) were harvested and the aluminum content was determined by graphite furnace atomic absorption spectrometry after tissue mineralization. Some transfer of aluminum salts to the central nervous system via the olfactory route was observed, with the more soluble aluminum chloride being transferred at higher levels than aluminum fluoride. No cerebral translocation of any of the aluminas studied was detected.
[Mh] Termos MeSH primário: Compostos de Alumínio/metabolismo
Compostos de Alumínio/toxicidade
Encéfalo/metabolismo
Condutos Olfatórios/metabolismo
[Mh] Termos MeSH secundário: Administração Intranasal
Algoritmos
Compostos de Alumínio/farmacocinética
Animais
Cloretos/metabolismo
Cloretos/farmacocinética
Cloretos/toxicidade
Fluoretos/metabolismo
Fluoretos/farmacocinética
Fluoretos/toxicidade
Masculino
Mucosa Nasal/patologia
Bulbo Olfatório/metabolismo
Ratos
Ratos Sprague-Dawley
Espectrofotometria Atômica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Aluminum Compounds); 0 (Chlorides); 3CYT62D3GA (aluminum chloride); Q80VPU408O (Fluorides); Z77H3IKW94 (aluminum fluoride)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180104
[Lr] Data última revisão:
180104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171129
[St] Status:MEDLINE


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[PMID]:27776228
[Au] Autor:Proskura N; Podlasinska J; Skopicz-Radkiewicz L
[Ad] Endereço:Department of Ecology, Environmental Protection and Management, West Pomeranian University of Technology, Szczecin, Slowackiego 17 St., 71-434, Szczecin, Poland. Electronic address: natalia.mazurkiewicz@zut.edu.pl.
[Ti] Título:Chemical composition and bioaccumulation ability of Boletus badius (Fr.) Fr. collected in western Poland.
[So] Source:Chemosphere;168:106-111, 2017 Feb.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of the study was to determine content of 17 elements (Co, Cd, Cu, Cr, Ni, Pb, Zn, Mn, Fe, Mg, Na, Ca, K, N, C, S and P) and their bioaccumulation factors (BCF) in bay bolete (Boletus badius (Fr.) Fr.) fruiting bodies (caps and stalks) and underneath soil samples collected from forest sites in lubuskie voivodeship in Poland. Forty-eight samples of Boletus badius (Fr.) Fr. fruiting bodies and the same number of underneath soil substrate samples were collected in forest sites of Sulecin Forest District in western Poland. Copper and zinc were absorbed most strongly from soil substrate, which is performed by bioaccumulation factors (BCF = 16.57 and 11.60, respectively), wherein Pb, Co, Cr, Fe and Mn were excluded from bioaccumulation (BCF < 1.0). The mean content of Cd in caps and stalks was 1.44 ± 0.88 and 2.01 ± 1.26 mg kg dry weight, respectively and in contrary to Pb (≈3.00 ± 2.66 and 2.01 ± 1.26 mg kg d. w.) this metal is strongly accumulated from subsoil (BCF = 11.12 and BCF = 10.83). The fruiting bodies of Boletus badius were distinguished by elevated content of Cr, Zn, Pb and Cd. Few statistically significant metal-to-metal correlations were observed. The correlation between forest habitat types and metals concentrations was also analysed. An attempt of estimation of Pb and Cd safe dose for human consumption was made. IN CONCLUSION: mushrooms can be a good source of some micro- and macroelements, but they also contain a great amount of toxic heavy metals.
[Mh] Termos MeSH primário: Agaricales/química
Carpóforos/química
Metais Pesados/análise
Poluentes do Solo/análise
Solo/química
[Mh] Termos MeSH secundário: Agaricales/crescimento & desenvolvimento
Carpóforos/crescimento & desenvolvimento
Seres Humanos
Polônia
Espectrofotometria Atômica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Soil); 0 (Soil Pollutants)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171212
[Lr] Data última revisão:
171212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE


  7 / 14312 MEDLINE  
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[PMID]:28946272
[Au] Autor:de Andrade CK; de Brito PMK; Dos Anjos VE; Quináia SP
[Ad] Endereço:Departamento de Química, Universidade Estadual do Centro-Oeste - UNICENTRO, 85040-080 Guarapuava, PR, Brazil. Electronic address: camilakulek@gmail.com.
[Ti] Título:Determination of Cu, Cd, Pb and Cr in yogurt by slurry sampling electrothermal atomic absorption spectrometry: A case study for Brazilian yogurt.
[So] Source:Food Chem;240:268-274, 2018 Feb 01.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A slurry sampling electrothermal atomic absorption spectrometric method is proposed for the determination of trace elements such as Cu, Cr, Cd and Pb in yogurt. The main factors affecting the slurry preparation were optimized: nature and concentration of acid solution and sonication time. The analytical method was validated in-house by calibration, linearity, limits of detection and quantification, precision and accuracy test obtaining satisfactory results in all cases. The proposed method was applied for the determination of Cd, Cr, Cu and Pb in some Brazilian yogurt samples. For these samples, the concentrations ranged from 2.5±0.2 to 12.4±0.2ngg ; 34±3 to 899±7ngg ; <8.3 to 12±1ngg ; and <35.4 to 210±16ngg for Cd, Cu, Cr and Pb, respectively. The daily intake of Cd, Cu, Cr and Pb via consumption of these samples was estimated.
[Mh] Termos MeSH primário: Metais Pesados/análise
Iogurte
[Mh] Termos MeSH secundário: Brasil
Espectrofotometria Atômica
Oligoelementos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Trace Elements)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171128
[Lr] Data última revisão:
171128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170927
[St] Status:MEDLINE


  8 / 14312 MEDLINE  
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[PMID]:29061819
[Au] Autor:Bai YC; Hsia YC; Lin YT; Chen KH; Chou FI; Yang CM; Chuang YJ
[Ad] Endereço:Department of Medical Science, National Tsing Hua University, Hsinchu, Taiwan, R.O.C.
[Ti] Título:Effect of Tumor Microenvironment on Selective Uptake of Boric Acid in HepG2 Human Hepatoma Cells.
[So] Source:Anticancer Res;37(11):6347-6353, 2017 11.
[Is] ISSN:1791-7530
[Cp] País de publicação:Greece
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Feasibility and efficacy of boric acid (BA)-mediated boron neutron capture therapy (BNCT) was first demonstrated by eliminating hepatocellular carcinoma (HCC) in a rat model. Furthermore, selective uptake of BA by liver tumor cells was shown in a rabbit model. To gain further insight, this study aimed to investigate the mechanisms of transportation and selective uptake of BA in HepG2 liver tumor cells. MATERIALS AND METHODS: Transportation of BA in HepG2 cells was analyzed by time-course assays and by analyzing the rate of diffusion versus the concentration of BA. The effect of different tumor conditions on BA uptake was studied by treating HepG2 cells with 25 µg B/ml BA under different concentrations of glucose, at different pH and in the presence of water-soluble cholesterol. RESULTS: HepG2 cells mainly uptake BA by simple diffusion. Cell membrane permeability may also contribute to tumor-specific uptake of BA. CONCLUSION: The selective uptake of BA was achieved primarily by diffusion, while other factors, such as low pH and increased membrane fluidity, which are hallmarks of HCC, might further enhance BA uptake.
[Mh] Termos MeSH primário: Ácidos Bóricos/farmacocinética
Carcinoma Hepatocelular/metabolismo
Neoplasias Hepáticas/metabolismo
Microambiente Tumoral/efeitos da radiação
[Mh] Termos MeSH secundário: Ácidos Bóricos/farmacologia
Terapia por Captura de Nêutron de Boro
Carcinoma Hepatocelular/radioterapia
Membrana Celular/ultraestrutura
Colesterol/farmacologia
Glucose/farmacologia
Células Hep G2
Seres Humanos
Concentração de Íons de Hidrogênio
Neoplasias Hepáticas/radioterapia
Espectrofotometria Atômica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Boric Acids); 97C5T2UQ7J (Cholesterol); IY9XDZ35W2 (Glucose); R57ZHV85D4 (boric acid)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171026
[Lr] Data última revisão:
171026
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171025
[St] Status:MEDLINE


  9 / 14312 MEDLINE  
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[PMID]:28832718
[Au] Autor:Camargo RV; Silva-Sousa YTC; Rosa RPFD; Mazzi-Chaves JF; Lopes FC; Steier L; Sousa-Neto MD
[Ad] Endereço:Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil.
[Ti] Título:Evaluation of the physicochemical properties of silicone- and epoxy resin-based root canal sealers.
[So] Source:Braz Oral Res;31:e72, 2017 Aug 21.
[Is] ISSN:1807-3107
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:To assess the physicochemical properties of AH Plus, GuttaFlow 2, GuttaFlow BioSeal, and MM Seal, five samples of each root canal sealer were evaluated to determine their setting time (ST), dimensional change (DC), solubility (SL), flow (FL), and radiopacity (RD) according to American National Standards Institute/American Dental Association (ANSI/ADA) Specification 57. The distilled and deionized water obtained from the SL test were subjected to atomic absorption spectrometry to observe the presence of Ca2+, K+, and Na+ ions. Statistical analysis was performed by using one-way ANOVA and Tukey-Kramer tests (p < 0.05). The following results were obtained: ST (min) (AH Plus 463.6 ± 13.22; GuttaFlow 2 24.35 ± 2.78; GuttaFlow Bioseal 17.4 ± 0.55; MM Seal 47.60 ± 4.39), DC (%) (AH Plus 0.06 ± 0.12; GuttaFlow 2 -26.06 ± 1.24; GuttaFlow Bioseal 2.10 ± 1.47; MM Seal 8.47 ± 2.41), SL (%) (AH Plus 0.41 ± 0.21; GuttaFlow 2 5.13 ± 4.11; GuttaFlow Bioseal 3.03 ± 1.05; MM Seal 0.94 ± 0.17), FL (mm) (AH Plus 36.42 ± 0.40; GuttaFlow 2 36.44 ± 0.05; GuttaFlow Bioseal 35.4 ± 0.03; MM Seal 52.75 ± 0.60), and RD (mmAl) (AH Plus 7.52 ± 1.59; GuttaFlow 2 6.85 ± 0.14; GuttaFlow Bioseal 7.02 ± 0.18; MM Seal 3.32 ± 0.90). ST, DC, SL, FL, and RD showed statistical differences among the root canal sealers (p < 0.05). As AH Plus showed the lowest DC and SL values (p < 0.05), the findings indicate that this sample is the only sealer conforming to ANSI/ADA standards.
[Mh] Termos MeSH primário: Dimetilpolisiloxanos/química
Resinas Epóxi/química
Guta-Percha/química
Materiais Restauradores do Canal Radicular/química
Silicones/química
[Mh] Termos MeSH secundário: Análise de Variância
Combinação de Medicamentos
Teste de Materiais
Valores de Referência
Solubilidade
Espectrofotometria Atômica
Estatísticas não Paramétricas
Propriedades de Superfície
Fatores de Tempo
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bioseal); 0 (Dimethylpolysiloxanes); 0 (Drug Combinations); 0 (Epoxy Resins); 0 (GuttaFlow); 0 (Root Canal Filling Materials); 0 (Silicones); 0 (epoxy resin-based root canal sealer); 9000-32-2 (Gutta-Percha)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170912
[Lr] Data última revisão:
170912
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:170824
[St] Status:MEDLINE


  10 / 14312 MEDLINE  
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[PMID]:28771531
[Au] Autor:Yang Y; He C; Huang L; Ban Y; Tang M
[Ad] Endereço:School of Environment, Key Laboratory of Ecological Restoration & Ecosystem Management, Northeast Normal University, Changchun, China.
[Ti] Título:The effects of arbuscular mycorrhizal fungi on glomalin-related soil protein distribution, aggregate stability and their relationships with soil properties at different soil depths in lead-zinc contaminated area.
[So] Source:PLoS One;12(8):e0182264, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Glomalin-related soil protein (GRSP), a widespread glycoprotein produced by arbuscular mycorrhizal fungi (AMF), is crucial for ecosystem functioning and ecological restoration. In the present study, an investigation was conducted to comprehensively analyze the effects of heavy metal (HM) contamination on AMF status, soil properties, aggregate distribution and stability, and their correlations at different soil depths (0-10, 10-20, 20-30, 30-40 cm). Our results showed that the mycorrhizal colonization (MC), hyphal length density (HLD), GRSP, soil organic matter (SOM) and soil organic carbon (SOC) were significantly inhibited by Pb compared to Zn at 0-20 cm soil depth, indicating that HM had significant inhibitory effects on AMF growth and soil properties, and that Pb exhibited greater toxicity than Zn at shallow layer of soil. Both the proportion of soil large macroaggregates (>2000 µm) and mean weight diameter (MWD) were positively correlated with GRSP, SOM and SOC at 0-20 cm soil depth (P < 0.05), proving the important contributions of GRSP, SOM and SOC for binding soil particles together into large macroaggregates and improving aggregate stability. Furthermore, MC and HLD had significantly positive correlation with GRSP, SOM and SOC, suggesting that AMF played an essential role in GRSP, SOM and SOC accumulation and subsequently influencing aggregate formation and particle-size distribution in HM polluted soils. Our study highlighted that the introduction of indigenous plant associated with AMF might be a successful biotechnological tool to assist the recovery of HM polluted soils, and that proper management practices should be developed to guarantee maximum benefits from plant-AMF symbiosis during ecological restoration.
[Mh] Termos MeSH primário: Proteínas Fúngicas/metabolismo
Fungos/metabolismo
Glicoproteínas/metabolismo
Chumbo/análise
Micorrizas/metabolismo
Poluentes do Solo/análise
Solo/química
Zinco/análise
[Mh] Termos MeSH secundário: Carbono/análise
Clorofila/metabolismo
Chumbo/metabolismo
Micorrizas/crescimento & desenvolvimento
Microbiologia do Solo
Poluentes do Solo/metabolismo
Espectrofotometria Atômica
Zinco/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fungal Proteins); 0 (Glycoproteins); 0 (Soil); 0 (Soil Pollutants); 0 (glomalin, Mycorrhizae); 1406-65-1 (Chlorophyll); 2P299V784P (Lead); 7440-44-0 (Carbon); J41CSQ7QDS (Zinc)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170804
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0182264



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