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Search: authors:"J. M. Williams"

4 papers found.
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Fluid Sampling under Adverse Conditions

Science Support Services FLUID SAMPLING UNDER ADVERSE CONDITIONS (1) Le Grand Vignoble, 42330 Saint-Galmier - France - J. M. WILLIAMS Des échantillons valables sont essentiels pour bien

An algal photoprotection index and vertical mixing in the Southern Ocean

We explored the relationship between mixing dynamics in the surface mixed layer and the photoprotective response of phytoplankton. The distribution of photoprotective pigments was determined at 15 stations in subantarctic waters southeast of New Zealand during austral autumn. The first-order kinetics of the phytoplankton photoprotective response to both light and dark was...

Fluid Sampling under Adverse Conditions

Science Support Services FLUID SAMPLING UNDER ADVERSE CONDITIONS (1) Le Grand Vignoble, 42330 Saint-Galmier - France - J. M. WILLIAMS Des échantillons valables sont essentiels pour bien

The role of the medial prefrontal cortex in attention: Altering predictability of task difficulty

Rats were trained on a signal detection task in which a light (200 or 500 msec) appeared randomly over one of three levers. The rat was required to press the illuminated lever. There were two versions of the task: a light detection-random (LDR) and a light detection-block (LDB) task that differed only in the predictability of the difficulty level of the upcoming stimuli (LDR...