RESUMO
The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several bacterial strains to obtain copper from the leach of chalcopyrite. The major native bacterial species involved in the bioleaching of sulphide ore (Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, Leptospirillum ferrooxidans and Leptospirillum ferriphilum) were isolated and the assays were performed with individual bacteria and in combination with At. thiooxidans. In conclusion, it was found that the consortium integrated by At. ferrooxidans and At. thiooxidans removed 70% of copper in 35 days from the selected ore, showing significant differences with the other consortia, which removed only 35% of copper in 35 days. To validate the assays was done an escalation in columns, where the bacterial consortium achieved a higher percentage of copper extraction regarding to control.
Assuntos
Bactérias/metabolismo , Cobre/metabolismo , Microbiologia Industrial/métodos , Consórcios MicrobianosRESUMO
The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several bacterial strains to obtain copper from the leach of chalcopyrite. The major native bacterial species involved in the bioleaching of sulphide ore (Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, Leptospirillum ferrooxidans and Leptospirillum ferriphilum) were isolated and the assays were performed with individual bacteria and in combination with At. thiooxidans. In conclusion, it was found that the consortium integrated by At. ferrooxidans and At. thiooxidans removed 70% of copper in 35 days from the selected ore, showing significant differences with the other consortia, which removed only 35% of copper in 35 days. To validate the assays was done an escalation in columns, where the bacterial consortium achieved a higher percentage of copper extraction regarding to control.(AU)
Assuntos
Cobre , Acidithiobacillus thiooxidans , Acidithiobacillus , Microbiologia do Solo , MineraçãoRESUMO
The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several bacterial strains to obtain copper from the leach of chalcopyrite. The major native bacterial species involved in the bioleaching of sulphide ore (Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, Leptospirillum ferrooxidans and Leptospirillum ferriphilum) were isolated and the assays were performed with individual bacteria and in combination with At. thiooxidans. In conclusion, it was found that the consortium integrated by At. ferrooxidans and At. thiooxidans removed 70% of copper in 35 days from the selected ore, showing significant differences with the other consortia, which removed only 35% of copper in 35 days. To validate the assays was done an escalation in columns, where the bacterial consortium achieved a higher percentage of copper extraction regarding to control.
Assuntos
Bactérias/metabolismo , Cobre/metabolismo , Microbiologia Industrial/métodos , Consórcios MicrobianosRESUMO
Se presentan las imágenes sialográficas de 60 casos con alcoholismo crónico. Los resultados demuestran una disminución del calibre de los ductos de segundo orden, no encontrado en personas normales, lo cual confiere a la imagen sialográfica de llene glandular parotídea un aspecto filiforme ductal. Dicha imagen podría orientar al diagnóstico de esta enfermedad
Assuntos
Humanos , Adolescente , Adulto , Pessoa de Meia-Idade , Alcoolismo/patologia , Glândula Parótida/patologia , Glândula Parótida , Sialografia , HipertrofiaRESUMO
Adapting to the American National Standards Institute (ANSI) 835 Health Care Claims Payment/Advice format--the first nationwide, all-payer electronic standard for healthcare claims--requires an approach tailored to the individual provider's system. Providers have four options for receiving ANSI 835 claims payments. They include: direct transmission from payers, value added network services (VANs), banks with electronic data interchange capabilities, and paper reports. Providers' claims processing systems vary enormously in the formats they use and in their capacities to transmit and receive claims payments electronically. Author Romo reviews factors that providers need to consider when refining internal capabilities and selecting external processors to accept the 835 format.
Assuntos
Redes de Comunicação de Computadores/normas , Administração Financeira de Hospitais/legislação & jurisprudência , Formulário de Reclamação de Seguro/normas , Medicare Part A/legislação & jurisprudência , Contas a Pagar e a Receber , Centers for Medicare and Medicaid Services, U.S. , Administração Financeira de Hospitais/métodos , Medicare Part A/normas , Estados UnidosRESUMO
Se presenta el cuadro clínico no descrito anteriormente de una familia en la que se encontraron 16 personas que mostraban, en forma constante, cuello corto y ancho, cardiopatía a expensas del ventrículo izquierdo y camptodactilia con hipoplasia de los pliegues de flexión. Todos tenían talla baja con variabilidad en su expresión. Otros datos no constantes fueron paladar alto, depresión del puente nasal, micrognatia, cúbito varo, posición dental anormal e hiperplasia gingival. Al tomar en cuenta las malformaciones constantes se le ha denominado "sindrome CCC", siglas que corresponden a cuello corto, cardiopatía y camptodactilia.
Assuntos
Humanos , Feminino , Lactente , Aberrações Cromossômicas/diagnóstico , Contratura/diagnóstico , Dedos/anormalidades , Articulações/anormalidades , Micrognatismo/diagnóstico , Osso Nasal/anormalidades , Pescoço/anormalidades , Articulação Metacarpofalângica/anormalidades , Cardiopatias Congênitas/diagnóstico , Síndrome , Artrogripose/diagnóstico , Cariotipagem , Diagnóstico Diferencial , Síndrome de Klippel-Feil/diagnósticoRESUMO
A study exposing the situation affecting the population of San Luis Potosí in central México, caused by dental fluorosis. Findings point to the need of implementing devices capable of regulating the concentrations of Fluorine ion (generating the efficient prevention of dental cavity incidence), to maintain them at optimal levels and without deletereal effects.