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[PMID]:28415511
[Au] Autor:Li Y; Liang Q; Lin C; Li X; Chen X; Hu Q
[Ad] Endereço:Plastic Surgery Institute of Weifang Medical University, Weifang Medical University, Weifang 261053, China; National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, China. Electronic address: lily19791002@126.com.
[Ti] Título:Facile synthesis and characterization of novel rapid-setting spherical sub-micron bioactive glasses cements and their biocompatibility in vitro.
[So] Source:Mater Sci Eng C Mater Biol Appl;75:646-652, 2017 Jun 01.
[Is] ISSN:1873-0191
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Dental pulp vitality is extremely important for the tooth viability, since it provides nutrition and forms the dentin. Bioactive glasses (BGs) may be promising materials for pulp repair due to their excellent abilities of rapidly bonding to bone and stimulating new bone growth. However, the unsatisfied handling property, low plasticity, and poor rapid-setting property of traditional BGs limit its application in vital pulp therapy. Spherical bioactive glasses (SBGs) exhibited higher osteogenesis and odontogenic differentiation than irregular BGs. This study focuses on the application of SBGs with rapid setting property for dental pulp repair. Here, SBGs with various compositions were successfully synthesized by a sol-gel process using dodecylamine (DDA) served as both a catalyst and a template. The maximum content of CaO in SBGs was about 15%. The non-bridge oxygen amounts of the SiO network and the apatite-forming ability increased with the content proportion of CaO and P O . Bioactive glass pulp capping materials (BGPCMs) were prepared by mixing the SBGs powders and the phosphate buffer solution (PBS). The K CaH(PO ) and hydroxyapatite (HA) formed between SBGs particles as soon as they were mixed with PBS solution. The compressive strengths of fully set BCPCM-2 molded were measured to be 31.76±1.9577MPa after setting for 24h. The K CaH(PO ) and the low crystallinity HA phases at the initial stage of solidification transformed to crystalline HA for 3days, and the compressive strength was still higher than 10MPa. Additionally, SBG-2 with a designed molar composition of 35% SiO , 55% CaO and 10% P O more promoted dental pulp cell proliferation, and could be potential pulp capping applications.
[Mh] Termos MeSH primário: Cimentos Dentários/química
Cimentos Dentários/farmacologia
Polpa Dentária/metabolismo
Vidro/química
Teste de Materiais
[Mh] Termos MeSH secundário: Aminas/química
Compostos de Cálcio/química
Células Cultivadas
Polpa Dentária/citologia
Seres Humanos
Óxidos/química
Compostos de Fósforo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amines); 0 (Calcium Compounds); 0 (Dental Cements); 0 (Oxides); 0 (Phosphorus Compounds); C7X2M0VVNH (lime); YWY9OD6A2K (dodecylamine)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170731
[Lr] Data última revisão:
170731
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170419
[St] Status:MEDLINE


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[PMID]:28269741
[Au] Autor:Lee S; Ueda K; Narushima T; Nakano T; Kasuga T
[Ad] Endereço:Division of Advanced Ceramics, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan.
[Ti] Título:Preparation of orthophosphate glasses in the MgO-CaO-SiO2-Nb2O5-P2O5 system.
[So] Source:Biomed Mater Eng;28(1):23-30, 2017.
[Is] ISSN:1878-3619
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Niobia/magnesia-containing orthophosphate invert glasses were successfully prepared in our earlier work. Orthophosphate groups in the glasses were cross-linked by tetrahedral niobia (NbO4) and magnesia. OBJECTIVE: The aim of this work is to prepare calcium orthophosphate invert glasses containing magnesia and niobia, incorporating silica, and to evaluate their structures and releasing behaviors. METHOD: The glasses were prepared by melt-quenching, and their structures and ion-releasing behaviors were evaluated. RESULTS: 31P solid-state nuclear magnetic resonance (NMR) and Raman spectroscopies showed the glasses consist of orthophosphate (PO4), orthosilicate (SiO4), and NbO4 tetrahedra. NbO4 and MgO in the glasses act as network formers. By incorporating SiO2 into the glasses, the chemical durability of the glasses was slightly improved. The glasses reheated at 800°C formed the orthophosphate crystalline phases, such as ß-Ca3(PO4)2, Mg3(PO4)2 and Mg3Ca3(PO4)4 in the glasses. The chemical durability of the crystallized glasses was slightly improved. CONCLUSIONS: Orthosilicate groups and NbO4 in the glasses coordinated with each other to form Si-O-Nb bonds. The chemical durability of the glasses was slightly improved by addition of SiO2, since the field strength of Si is larger than that of Ca or Mg.
[Mh] Termos MeSH primário: Compostos de Cálcio/química
Vidro/química
Óxido de Magnésio/química
Nióbio/química
Óxidos/química
Fosfatos/química
Compostos de Fósforo/química
Dióxido de Silício/química
[Mh] Termos MeSH secundário: Materiais Biocompatíveis/química
Cristalização
Calefação
Espectroscopia de Ressonância Magnética
Teste de Materiais
Análise Espectral Raman
Propriedades de Superfície
Temperatura de Transição
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biocompatible Materials); 0 (Calcium Compounds); 0 (Oxides); 0 (Phosphates); 0 (Phosphorus Compounds); 05175J654G (Niobium); 3A3U0GI71G (Magnesium Oxide); 51SWB7223J (phosphorus pentoxide); 7631-86-9 (Silicon Dioxide); C7X2M0VVNH (lime); K9343U17IN (niobium pentoxide)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170309
[St] Status:MEDLINE
[do] DOI:10.3233/BME-171652


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[PMID]:27726035
[Au] Autor:Valdespino-Castillo PM; Alcántara-Hernández RJ; Merino-Ibarra M; Alcocer J; Macek M; Moreno-Guillén OA; Falcón LI
[Ad] Endereço:Laboratorio de Ecología Bacteriana, Instituto de Ecología, Universidad Nacional Autónoma de México, 04510, Mexico City, Mexico.
[Ti] Título:Phylotype Dynamics of Bacterial P Utilization Genes in Microbialites and Bacterioplankton of a Monomictic Endorheic Lake.
[So] Source:Microb Ecol;73(2):296-309, 2017 Feb.
[Is] ISSN:1432-184X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Microbes can modulate ecosystem function since they harbor a vast genetic potential for biogeochemical cycling. The spatial and temporal dynamics of this genetic diversity should be acknowledged to establish a link between ecosystem function and community structure. In this study, we analyzed the genetic diversity of bacterial phosphorus utilization genes in two microbial assemblages, microbialites and bacterioplankton of Lake Alchichica, a semiclosed (i.e., endorheic) system with marked seasonality that varies in nutrient conditions, temperature, dissolved oxygen, and water column stability. We focused on dissolved organic phosphorus (DOP) utilization gene dynamics during contrasting mixing and stratification periods. Bacterial alkaline phosphatases (phoX and phoD) and alkaline beta-propeller phytases (bpp) were surveyed. DOP utilization genes showed different dynamics evidenced by a marked change within an intra-annual period and a differential circadian pattern of expression. Although Lake Alchichica is a semiclosed system, this dynamic turnover of phylotypes (from lake circulation to stratification) points to a different potential of DOP utilization by the microbial communities within periods. DOP utilization gene dynamics was different among genetic markers and among assemblages (microbialite vs. bacterioplankton). As estimated by the system's P mass balance, P inputs and outputs were similar in magnitude (difference was <10 %). A theoretical estimation of water column P monoesters was used to calculate the potential P fraction that can be remineralized on an annual basis. Overall, bacterial groups including Proteobacteria (Alpha and Gamma) and Bacteroidetes seem to be key participants in DOP utilization responses.
[Mh] Termos MeSH primário: Bactérias/genética
Genes Bacterianos/genética
Variação Genética
Lagos/microbiologia
Fósforo/metabolismo
Filogenia
[Mh] Termos MeSH secundário: Fosfatase Alcalina/genética
Organismos Aquáticos/genética
Organismos Aquáticos/metabolismo
Bactérias/enzimologia
Bactérias/metabolismo
Bacteroidetes/genética
Bacteroidetes/metabolismo
Sequência de Bases
DNA Bacteriano/análise
Ecossistema
Meio Ambiente
Regulação Bacteriana da Expressão Gênica
Marcadores Genéticos/genética
México
Oxigênio/química
Fósforo/química
Compostos de Fósforo/química
Compostos de Fósforo/metabolismo
Reação em Cadeia da Polimerase/métodos
Proteobactérias/genética
Proteobactérias/metabolismo
RNA Bacteriano/análise
Estações do Ano
Análise de Sequência
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Genetic Markers); 0 (Phosphorus Compounds); 0 (RNA, Bacterial); 059QF0KO0R (Water); 27YLU75U4W (Phosphorus); EC 3.1.3.1 (Alkaline Phosphatase); S88TT14065 (Oxygen)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161012
[St] Status:MEDLINE
[do] DOI:10.1007/s00248-016-0862-1


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[PMID]:27561380
[Au] Autor:Pan Z; Zheng Y; Guo F; Niu P; Wang X
[Ad] Endereço:State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, P. R. China.
[Ti] Título:Decorating CoP and Pt Nanoparticles on Graphitic Carbon Nitride Nanosheets to Promote Overall Water Splitting by Conjugated Polymers.
[So] Source:ChemSusChem;10(1):87-90, 2017 Jan 10.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The splitting of water into H and O using solar energy is one of the key steps in artificial photosynthesis for the future production of renewable energy. Here, we show the first use of CoP and Pt nanoparticles as dual co-catalysts to modify graphitic carbon nitride (g-C N ) polymer to achieve overall water splitting under visible light irradiation. Our findings demonstrate that loading dual co-catalysts on delaminated g-C N imparts surface redox sites on the g-C N nanosheets that can not only promote catalytic kinetics but also promote charge separation and migration in the soft interface, thus improving the photocatalytic efficiency for overall water splitting. This robust, abundant, and stable photocatalyst based on covalent organic frameworks is demonstrated to hold great promise by forming heterojunctions with CoP and Pt for catalyzing the direct splitting of water into stoichiometric H and O using energy from photons.
[Mh] Termos MeSH primário: Grafite/química
Nanopartículas Metálicas/química
Nitrilos/química
Compostos de Fósforo/química
Polímeros/química
Água/química
[Mh] Termos MeSH secundário: Cobalto/química
Modelos Moleculares
Conformação Molecular
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Nitriles); 0 (Phosphorus Compounds); 0 (Polymers); 059QF0KO0R (Water); 3G0H8C9362 (Cobalt); 534Q0F66RK (cyanogen); 7782-42-5 (Graphite)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170523
[Lr] Data última revisão:
170523
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160827
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201600850


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[PMID]:27739663
[Au] Autor:Raczynska ED; Gal JF; Maria PC
[Ad] Endereço:Department of Chemistry, Warsaw University of Life Sciences (SGGW) , ul. Nowoursynowska 159c, 02-776 Warszawa, Poland.
[Ti] Título:Enhanced Basicity of Push-Pull Nitrogen Bases in the Gas Phase.
[So] Source:Chem Rev;116(22):13454-13511, 2016 Nov 23.
[Is] ISSN:1520-6890
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Nitrogen bases containing one or more pushing amino-group(s) directly linked to a pulling cyano, imino, or phosphoimino group, as well as those in which the pushing and pulling moieties are separated by a conjugated spacer (C═X) , where X is CH or N, display an exceptionally strong basicity. The n-π conjugation between the pushing and pulling groups in such systems lowers the basicity of the pushing amino-group(s) and increases the basicity of the pulling cyano, imino, or phosphoimino group. In the gas phase, most of the so-called push-pull nitrogen bases exhibit a very high basicity. This paper presents an analysis of the exceptional gas-phase basicity, mostly in terms of experimental data, in relation with structure and conjugation of various subfamilies of push-pull nitrogen bases: nitriles, azoles, azines, amidines, guanidines, vinamidines, biguanides, and phosphazenes. The strong basicity of biomolecules containing a push-pull nitrogen substructure, such as bioamines, amino acids, and peptides containing push-pull side chains, nucleobases, and their nucleosides and nucleotides, is also analyzed. Progress and perspectives of experimental determinations of GBs and PAs of highly basic compounds, termed as "superbases", are presented and benchmarked on the basis of theoretical calculations on existing or hypothetical molecules.
[Mh] Termos MeSH primário: Álcalis/química
Gases/química
Compostos Orgânicos/química
[Mh] Termos MeSH secundário: Aminas/química
Aminoácidos/química
Azóis/química
Biguanidas/química
Iminas/química
Ligantes
Estrutura Molecular
Nitrilos/química
Peptídeos/química
Compostos de Fósforo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Alkalies); 0 (Amines); 0 (Amino Acids); 0 (Azoles); 0 (Biguanides); 0 (Gases); 0 (Imines); 0 (Ligands); 0 (Nitriles); 0 (Organic Chemicals); 0 (Peptides); 0 (Phosphorus Compounds)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170920
[Lr] Data última revisão:
170920
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161015
[St] Status:MEDLINE


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[PMID]:27617375
[Au] Autor:Asgary S; Fazlyab M; Nosrat A
[Ti] Título:Regenerative Endodontic Treatment versus Apical Plug in Immature Teeth: Three-Year Follow-Up.
[So] Source:J Clin Pediatr Dent;40(5):356-60, 2016.
[Is] ISSN:1053-4628
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This report compares and evaluates the treatment outcomes of regenerative endodontic treatment and apical plug as two accepted treatment protocols in a pair of necrotic immature maxillary central incisors of a 12-year old female. The patient was referred complaining of a dull pain and swelling in her upper lip area. She had a history of trauma to the anterior maxilla two years earlier. Both teeth were clinically diagnosed with pulp necrosis and periapical radiographs revealed that separate periapical radiolucent lesions surrounded the immature apices of both teeth. The left and right incisors were treated with apical plug and regenerative endodontic treatment, respectively, using calcium-enriched mixture (CEM) cement. The patient was followed-up for three years. During this period, both teeth were clinically asymptomatic and showed complete radiographic healing of the periapical lesions. The right central incisor showed root development. No tooth discoloration was evident. Apexification by apical plug placement and pulp regeneration are both reliable treatments for immature non-vital teeth. In order to choose the right treatment the advantages of either technique should be weighed against its drawbacks. CEM cement can be successfully applied for both purposes. This biomaterial causes less discoloration of the tooth.
[Mh] Termos MeSH primário: Apexificação/métodos
Necrose da Polpa Dentária/terapia
Incisivo/patologia
Dente não Vital/terapia
[Mh] Termos MeSH secundário: Antibacterianos/administração & dosagem
Antibacterianos/uso terapêutico
Compostos de Cálcio
Criança
Ciprofloxacino/administração & dosagem
Cimentos Dentários/uso terapêutico
Combinação de Medicamentos
Feminino
Seguimentos
Seres Humanos
Incisivo/efeitos dos fármacos
Metronidazol/administração & dosagem
Minociclina/administração & dosagem
Óxidos
Abscesso Periapical/terapia
Periodontite Periapical/terapia
Compostos de Fósforo
Regeneração/fisiologia
Materiais Restauradores do Canal Radicular/uso terapêutico
Preparo de Canal Radicular/métodos
Silicatos
Ápice Dentário/fisiologia
Resultado do Tratamento
[Pt] Tipo de publicação:CASE REPORTS; COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Calcium Compounds); 0 (Dental Cements); 0 (Drug Combinations); 0 (Oxides); 0 (Phosphorus Compounds); 0 (Root Canal Filling Materials); 0 (Silicates); 0 (calcium-enriched mixture cement); 140QMO216E (Metronidazole); 5E8K9I0O4U (Ciprofloxacin); FYY3R43WGO (Minocycline)
[Em] Mês de entrada:1701
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:160913
[St] Status:MEDLINE
[do] DOI:10.17796/1053-4628-40.5.356


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[PMID]:27550502
[Au] Autor:Grela E; Dzielak A; Szydlowska K; Mucha A; Kafarski P; Grabowiecka AM
[Ad] Endereço:1​Department of Bioorganic Chemistry, Faculty of Chemistry, Wroclaw University of Technology, Wroclaw, Poland.
[Ti] Título:Whole-cell Proteus mirabilis urease inhibition by aminophosphinates for the control of struvite formation.
[So] Source:J Med Microbiol;65(10):1123-1129, 2016 Oct.
[Is] ISSN:1473-5644
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The study evaluated the in vitro impact of a series of aminophosphinic urease inhibitors on Proteusmirabilis. The group of compounds comprised structurally diverse analogues of diamidophosphate built on an N-C-P scaffold. The influence of urease inhibition on urea-splitting activity was assessed by whole-cell pH-static kinetic measurements. The potential to prevent struvite formation was determined by monitoring changes in pH and ionic composition of artificial urine medium during P. mirabilis growth. The most active compounds exhibited stronger positive effect on urine stability than the acknowledged inhibitor acetohydroxamic acid. The high anti-ureolytic and pH-stabilizing effect of urease inhibitors 4 and 14 was well correlated with their reported kinetic properties against pure urease from P. mirabilis (Ki values of 0.62±0.09 and 0.202±0.057 µM, respectively, compared to 5.7±0.4 µM for acetohydroxamic acid). The effect of repressed ureolysis upon the viability of Proteus cells was studied using MTT [3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide] metabolic efficiency assay and LIVE/DEAD fluorescent staining. Most of the compounds caused whole-cell dehydrogenase activity loss; four structures (1, 2, 4 and 14) reduced the culture viability by nearly 70 % at 1 mM concentration. Results of dual fluorescent staining suggested that besides urea-splitting prevention, the structures additionally exerted an outer-membrane-destabilizing effect.
[Mh] Termos MeSH primário: Inibidores Enzimáticos/metabolismo
Compostos de Fósforo/metabolismo
Proteus mirabilis/enzimologia
Estruvita/metabolismo
Urease/antagonistas & inibidores
[Mh] Termos MeSH secundário: Inibidores Enzimáticos/química
Concentração de Íons de Hidrogênio
Íons/análise
Viabilidade Microbiana/efeitos dos fármacos
Compostos de Fósforo/química
Proteus mirabilis/efeitos dos fármacos
Urina/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Enzyme Inhibitors); 0 (Ions); 0 (Phosphorus Compounds); AW3EJL1462 (Struvite); E0D8P3MX2C (phosphorodiamidic acid); EC 3.5.1.5 (Urease)
[Em] Mês de entrada:1701
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160824
[St] Status:MEDLINE
[do] DOI:10.1099/jmm.0.000342


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[PMID]:27527556
[Au] Autor:Rzanny R; Stutzig N; Hiepe P; Gussew A; Thorhauer HA; Reichenbach JR
[Ad] Endereço:Medical Physics Group, Institute of Diagnostic and Interventional Radiology, University Hospital Jena, Germany. Electronic address: Reinhard.Rzanny@med.uni-jena.de.
[Ti] Título:The reproducibility of different metabolic markers for muscle fiber type distributions investigated by functional P-MRS during dynamic exercise.
[So] Source:Z Med Phys;26(4):323-338, 2016 Dec.
[Is] ISSN:1876-4436
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:PURPOSE: The objective of the study was to investigate the reproducibility of exercise induced pH-heterogeneity by splitting of the inorganic phosphate (Pi) signal in the corresponding P-MRS spectra and to compare results of this approach with other fiber-type related markers, like phosphocreatine/adenosine triphosphate (PCr/ATP) ratio, and PCr-recovery parameters. MATERIAL AND METHODS: Subjects (N=3) with different sportive background were tested in 10 test sessions separated by at least 3 days. A MR-compatible pedal ergometer was used to perform the exercise and to induce a pH-based splitting of the Pi-signal in P-MR spectra of the medial gastrocnemius muscle. The PCr recovery was analyzed using a non-negative least square algorithm (NNLS) and multi-exponential regression analysis to estimate the number of non-exponential components as well as their amplitude and time constant. The reproducibility of the estimated metabolic marker and the resulting fiber-type distributions between the 10 test sessions were compared. RESULTS: The reproducibility (standard deviation between measurements) based on (1) Pi components varied from 2% to 4%, (2) PCr recovery time components varied from 10% to 12% and (3) phosphate concentrations at rest varied from 8% to 11% between test sessions. Due to the sportive activity differences between the 3 subjects were expected in view of fiber type distribution. All estimated markers indicate the highest type I percentage for volunteer 3 medium for volunteer 2 and the lowest for volunteer 1. CONCLUSIONS: The relative high reproducibility of pH dependent Pi components during exercise indicates a high potential of this method to estimate muscle fiber-type distributions in vivo. To make this method usable not only to detect differences in muscle fiber distributions but also to determine individual fiber-type volume contents it is therefore recommended to validate this marker by histological methods and to reveal the effects of muscle fiber recruitments and fiber-type specific Pi concentrations on the intensity ratios between the splitted Pi-components.
[Mh] Termos MeSH primário: Exercício/fisiologia
Espectroscopia de Ressonância Magnética/métodos
Fibras Musculares Esqueléticas/classificação
Fibras Musculares Esqueléticas/fisiologia
Fosfocreatina/metabolismo
Compostos de Fósforo/metabolismo
[Mh] Termos MeSH secundário: Adulto
Seres Humanos
Imagem por Ressonância Magnética/métodos
Masculino
Taxa de Depuração Metabólica
Imagem Molecular/métodos
Fibras Musculares Esqueléticas/citologia
Isótopos de Fósforo/farmacocinética
Compostos Radiofarmacêuticos/farmacocinética
Reprodutibilidade dos Testes
Sensibilidade e Especificidade
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Phosphorus Compounds); 0 (Phosphorus Isotopes); 0 (Radiopharmaceuticals); 020IUV4N33 (Phosphocreatine)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170426
[Lr] Data última revisão:
170426
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160817
[St] Status:MEDLINE


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[PMID]:27527128
[Au] Autor:Wang S; Hawkins GL; Kiepper BH; Das KC
[Ad] Endereço:College of Engineering, University of Georgia, Athens, GA 30602, USA. wshl2000@uga.edu.
[Ti] Título:Struvite Precipitation as a Means of Recovering Nutrients and Mitigating Ammonia Toxicity in a Two-Stage Anaerobic Digester Treating Protein-Rich Feedstocks.
[So] Source:Molecules;21(8), 2016 Aug 03.
[Is] ISSN:1420-3049
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Accumulation of ammonia, measured as total ammonia nitrogen (TAN), a product of protein decomposition in slaughterhouse wastes, inhibits the anaerobic digestion process, reducing digester productivity and leading to failure. Struvite precipitation (SP) is an effective means to remove TAN and enhance the buffering of substrates. Different Mg and P sources were evaluated as reactants in SP in acidogenic digester effluents to reduce its TAN levels. In order to measure impact of TAN removal, a standard biochemical methane potential (BMP) test was conducted to measure methane yield from treatments that had the highest TAN reductions. SP results showed 6 of 9 reagent combinations resulted in greater than 70% TAN removal. The BMP results indicated that SP treatment by adding Mg(OH)2 and H3PO4 resulted in 57.6% nitrogen recovery and 41.7% increase in methane yield relative to the substrate without SP. SP is an effective technology to improve nutrient recovery and methane production from the anaerobic digestion of protein-rich feedstocks.
[Mh] Termos MeSH primário: Amônia/análise
Resíduos Sólidos/análise
Estruvita/química
[Mh] Termos MeSH secundário: Matadouros
Anaerobiose
Precipitação Química
Compostos de Magnésio/química
Compostos de Fósforo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Magnesium Compounds); 0 (Phosphorus Compounds); 0 (Solid Waste); 7664-41-7 (Ammonia); AW3EJL1462 (Struvite)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170417
[Lr] Data última revisão:
170417
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160817
[St] Status:MEDLINE


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[PMID]:27455933
[Au] Autor:Thiex NJ
[Ti] Título:Determination of Phosphorus and Potassium in Commercial Inorganic Fertilizers by Inductively Coupled Plasma-Optical Emission Spectrometry: Single-Laboratory Validation, First Action 2015.18.
[So] Source:J AOAC Int;99(4):914-22, 2016 Jul.
[Is] ISSN:1060-3271
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A previously validated method for the determination of both citrate-EDTA-soluble P and K and acid-soluble P and K in commercial inorganic fertilizers by inductively coupled plasma-optical emission spectrometry was submitted to the expert review panel (ERP) for fertilizers for consideration of First Action Official Method(SM) status. The ERP evaluated the single-laboratory validation results and recommended the method for First Action Official Method status and provided recommendations for achieving Final Action. Validation materials ranging from 4.4 to 52.4% P2O5 (1.7-22.7% P) and 3-62% K2O (2.5-51.1% K) were used for the validation. Recoveries from validation materials for citrate-soluble P and K ranged from 99.3 to 124.9% P and from 98.4 to 100.7% K. Recoveries from validation materials for acid-soluble "total" P and K ranged from 95.53 to 99.40% P and from 98.36 to 107.28% K. Values of r for citrate-soluble P and K, expressed as RSD, ranged from 0.28 to 1.30% for P and from 0.41 to 1.52% for K. Values of r for total P and K, expressed as RSD, ranged from 0.71 to 1.13% for P and from 0.39 to 1.18% for K. Based on the validation data, the ERP recommended the method (with alternatives for the citrate-soluble and the acid-soluble extractions) for First Action Official Method status and provided recommendations for achieving Final Action status.
[Mh] Termos MeSH primário: Fertilizantes/análise
Fósforo/análise
Potássio/análise
[Mh] Termos MeSH secundário: Calibragem
Ácido Cítrico/química
Ácido Edético/química
Óxidos/análise
Compostos de Fósforo/análise
Compostos de Potássio/análise
Compostos de Amônio Quaternário/química
Espectrofotometria Atômica/normas
Estudos de Validação como Assunto
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fertilizers); 0 (Oxides); 0 (Phosphorus Compounds); 0 (Potassium Compounds); 0 (Quaternary Ammonium Compounds); 27YLU75U4W (Phosphorus); 2968PHW8QP (Citric Acid); 51SWB7223J (phosphorus pentoxide); 58D606078H (potassium oxide); 7632-50-0 (ammonium citrate); 9G34HU7RV0 (Edetic Acid); RWP5GA015D (Potassium)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170718
[Lr] Data última revisão:
170718
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160727
[St] Status:MEDLINE
[do] DOI:10.5740/jaoacint.16-0050



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