(Table 1) Chemical composition of a sample contaiting native aluminium, Core DM9-647, Northeast Pacific

Composition, structure and occurrence of native aluminium in bottom sediments of the Northeast Pacific at Station DM9-647 are reported.

Simultaneous high-resolution pH and spectrophotometric recordings of oxygen binding in native blood microvolumes, link to supplementary material

Oxygen equilibrium curves have been widely used to understand oxygen transport in numerous organisms. A major challenge has been to monitor oxygen binding characteristics and concomitant pH changes as they occur in vivo, in limited sample volumes. Here we report a technique allowing highly resolved and simultaneous monitoring of pH and blood pigment saturation in minute blood volumes. We equipped a gas diffusion chamber with a broad range fibre optic spectrophotometer and a micro-pH optode and recorded changes of pigment oxygenation along PO2 and pH gradients to test the setup. Oxygen binding parameters derived from measurements in only 15 µl of haemolymph from the cephalopod Octopus vulgaris showed low instrumental error (0.93%) and good agreement with published data. Broad range spectra, each resolving 2048 data points, provided detailed insight into the complex absorbance characteristics of diverse blood types. After consideration of photobleaching and intrinsic fluorescence, pH optodes yielded accurate recordings and resolved a sigmoidal shift of 0.03 pH units in response to changing PO2 from 0-21 kPa. Highly resolved continuous recordings along pH gradients conformed to stepwise measurements at low rates of pH changes. In this study we showed that a diffusion chamber upgraded with a broad range spectrophotometer and an optical pH sensor accurately characterizes oxygen binding with minimal sample consumption and manipulation. We conclude that the modified diffusion chamber is highly suitable for experimental biologists who demand high flexibility, detailed insight into oxygen binding as well as experimental and biological accuracy combined in a single set up.

Native American women's rights conference

General note: Title and date provided by Bettye Lane.

Native American (Navajo) recipient Annie Wauneka from Fort Defiance, Arizona reservation at Women of the Year awards

General note: Title and date provided by Bettye Lane.

Native American woman Yvonne Wanrow speaking at Political Prisoner speak-out

General note: Title and date provided by Bettye Lane.

Native American women's rights conference

General note: Title and date provided by Bettye Lane.

Native American women's rights conference

General note: Title and date provided by Bettye Lane.

Native American women's rights conference

General note: Title and date provided by Bettye Lane.

Maue Walters, Native American woman and a delegate from Oklahoma

General note: Title and date provided by Bettye Lane.

Molecular basis of native inward rectifier currents : role of Kir2 subunits

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.

Molecular basis of native inward rectifier currents : role of Kir2 subunits

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.