Abstract Wellbore instability problems cause nonproductive time, especially during drilling operations in the shale formations. These include stuck pipe, caving, lost circulation, and tight hole, requiring more time to treat therefore additional costs. The extensive hole collapse problem is considered one of main challenges experienced when Zubair formation. In turn, it caused by increasing wel...

Glial dysfunction has been implicated in a number of neurodegenerative diseases. In this study we investigated the consequences of glial and oligodendrocyte ablation on neuronal integrity and survival in Drosophila and adult mice, respectively. Targeted genetic ablation of glia was achieved in the adult Drosophila nervous system using the GAL80-GAL4 system. In mice, oligodendrocytes were deplet...

PREMISE OF THE STUDY This study was designed to develop and characterize a preliminary set of nuclear microsatellite markers for Aspidosperma polyneuron, an endangered tropical tree species. METHODS AND RESULTS Leaf samples were collected from a group of mature A. polyneuron trees in a large area along the Pardo and Mogi-Guaçu river basins in São Paulo State in the southeastern region of Braz...

First submission on 18/02/13; last submission on 19/09/13; accepted for publication on 11/10/13; published on 20/02/14 1. Master’s degree in Genetics and Evolution from Universidade Federal de São Carlos (UFSCar); scientific researcher III at Instituto Adolfo Lutz (IAL)-São Paulo. 2. Bachelor’s degree in Biology from Universidade de Mogi das Cruzes (UMC); scientific researcher II at IAL-São Pau...

The paper represents a comparative cytogenetic analysis of three populations of Hypostomus regani in Brazil.Two populations belong to the Upper Paraná River Basin and the third one, the karyotype of which is described for the first time, was probably introduced into the São Francisco River Basin through transposition from the Piumhi River. Karyotype features of populations of Hypostomus regani ...

The goal of this research is to explain the word formation, prefix, Mongondow language. method used in study a taxonomic descriptive method, namely exposure by classifying language elements according hierarchical relationships. results show formation patterns are done adding prefixes, infixes, suffixes, confixes, and clitics. In pattern morphophonemic process occurs, resulting new forms like ph...