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1. We investigated the regulation of intracellular pH (pHi) in rat brain isolated nerve terminals (synaptosomes), using fluorescence pH indicators and time-resolved fluorescence spectroscopy. 2. The resting pHi was not significantly affected by the presence or absence of HCO3-. Removal of external Na+, in the absence or presence of HCO3- caused a rapid(More)
Micro RNAS (miRNAs) are a class of endogenous small non coding RNAs involved in the post-transcriptional regulation of gene expression. In plants, a great number of conserved and specific miRNAs, mainly arising from model species, have been identified to date. However less is known about the diversity of these regulatory RNAs in vegetal species with(More)
In this article, we describe a Java-based virtual laboratory, accessible via the Internet by means of a Web browser. This remote laboratory enables the students to build both direct and alternating current circuits. The program includes a graphical user interface which resembles the connection board, and also the electrical components and tools that are(More)
The analysis of the surface energy budget (SEB) yields insights into soil-atmosphere interactions and local climates, while the analysis of the thermal inertia (I) of shallow subsurfaces provides context for evaluating geological features. Mars orbital data have been used to determine thermal inertias at horizontal scales of ~10 4 m 2 to ~10 7 m 2. Here we(More)
In recent years, significant advances have been made in business organization and management. The growing demands of clients as well as the globalization of world markets are among the many factors that have led to the establishment of systems of quality control and environmental management as a competitive strategy for businesses. When compared to other(More)
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