RESUMO

Anaerobic ammonium oxidizers contribute to the removal of fixed nitrogen in oxygen-deficient marine ecosystems such as oxygen minimum zones (OMZ). Here we surveyed for the first time the occurrence and diversity of anammox bacteria in the Colombian Pacific, a transition area between the prominent South and North Pacific OMZs. Anammox bacteria were detected in the coastal and oceanic areas of the Colombian Pacific in low oxygen (< 22 µM), high nitrate (25­35 µM) and low nitrite (< 0.07 µM), and ammonium (< 1 µM) waters. In these waters, anammox bacteria were rich [∼ 7 operational taxonomic units (OTUs), 98% cut-off) and microdiverse (Shannon index H' < 1.24), in comparison with the observed at the prominent OMZ of the Eastern Tropical South Pacific, Arabian Sea and Black Sea. Anammox bacteria-like sequences from the Colombian Pacific were grouped together with sequences retrieved from the distinct OMZ's marine subclusters (Peru, Northern Chile and Arabian Sea) within Candidatus 'Scalindua spp'. Moreover, some anammox bacteria OTUs shared a low similarity with environmental phylotypes (86­94%). Our results indicated that a microdiverse anammox community inhabits the Colombian Pacific, generating new questions about the ecological and biogeochemical differences influencing its community structure.

Assuntos

Amônia/metabolismo , Bactérias/isolamento & purificação , Bactérias/metabolismo , Água do Mar/microbiologia , Bactérias/classificação , Bactérias/genética , Biodiversidade , Colômbia , Ecossistema , Dados de Sequência Molecular , Nitratos/análise , Nitratos/metabolismo , Nitritos/análise , Nitritos/metabolismo , Oceanos e Mares , Oxirredução , Oxigênio/análise , Oxigênio/metabolismo , Filogenia , Água do Mar/análise

RESUMO

Se ha demostrado que en los pacientes diabeticos, los niveles de hemoglobina A1 se encuentram elevados en comparacion con los de la poblacion sana, y que esta hemoglobina refleja los niveles promedio de las glucemias en el periodo anterior de varias semanas. Estudiamos por 3 a 4 meses a 30 diabeticos tipo II tratados con clorpropamida. Al inicio del estudio la glucemia promedio fue 236.7 mg %, que disminuyo a 134,4%; del mismo modo, el promedio de la hemoglobina A1 bajo de 11,1% hasta 6,5% al finalizar el estudio. El analisis estadistico de estas dos determinaciones fue de P < 0.05 en los dias + 30, + 60, y +90; y r = 0.76. Con estes datos, consideramos que la determinacion de la hemoglobina A1 puede ser de utilidad en la valoracion del estado metabolico del paciente diabetico

Assuntos

Adulto , Pessoa de Meia-Idade , Humanos , Masculino , Feminino , Clorpropamida , Diabetes Mellitus , Hemoglobina A