To assess the suppression of locomotor activity by light during the nocturnal active phase (negative masking) in freely-moving animals, wild-type (n=3) and rd/rd cl mice (n=3) mice entrained to a 12 : 12 h LD cycle were exposed to 20-min bright light pulses (380 μWcm, ∼1125 lux) starting approximately 4 h after lights off (ZT16 ± 30 min), in the mid-active phase.
Cassavetes himself was between stations: he was in his mid-twenties, active and scuffling, worldly and incipient.
Or is there a possibility UppP could access C55-PP substrate from both faces at its internalized mid-layer active site?
There is little doubt that the Navy's mid-frequency active sonar is an effective tool for locating quiet-running submarines and that training is needed in shallow, offshore waters where sound propagates differently than in the open ocean.
In 2006-08, I worked as co-PI with a group of top marine mammal scientists investigating the impacts of the Navy's mid-frequency active sonar on beaked whales.
Some scientists said that the "mid-frequency active" sonar that the Navy uses during training might harm whales and cause injury or strandings.
The satellite-linked dive recorders will continue to transmit data for several weeks, allowing us to measure the response of these tagged whales to a Navy training exercise involving Mid-Frequency Active Sonar (MFAS).
Potential research sites off Virginia, Florida, and North Carolina were considered and the relative logistical challenges and advantages of each location were evaluated, together with Navy interests regarding mid-frequency active sonar (MFAS) usage and the potential for coordination with sonar training operations.
The war games would include two Carrier Strike Groups, use of high-frequency and mid-frequency active sonar for Anti-Submarine Warfare exercises, training on new weapons systems, and two ship-sinking exercises each year.
The Natural Resources Defense Council has settled a significant case with the Navy in which we challenged mid-frequency active sonar training exercises that were being carried out around the world without the adequate environmental review required by federal law.
Unusual mass strandings of cetaceans, especially beaked whales, have been associated with the operation of military mid-frequency active (MFA) sonars; these sometimes fatal events have raised serious concern about impacts of sonar and other anthropogenic sounds on whales [ 1– 3].
