Michael M. Pollock

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The frequency dependence of electromagnetic field-induced calcium-ion efflux from chicken brain tissues has been examined at 15-Hz intervals over the range 1-510 Hz. The electric field component was 15 Vrms/m and the magnetic component varied between 59 and 69 nTrms. No patterns of response as a function of frequency could be readily discerned when the(More)
This study tests the capacity of 50 Hz magnetic and electric fields to stimulate neurite outgrowth in PC-12D cells, a cell line which originated from a pheochromocytoma in rat adrenal medulla. The cells were plated on collagen-coated, plastic petri dishes and exposed to sinusoidal 50 Hz magnetic fields for 22 h in a 5% CO2 incubator at 37 degrees C. Two(More)
Memorandum NMFS-NWFSC series to issue scientific and technical publications. Manuscripts have been peer reviewed and edited. Documents published in this series may be cited in the scientific and technical literature. Figure 11. A PLWW is similar to a SD, but acts more like a weir in that water is allowed to flow through the willow branches such that low(More)
Beaver have been referred to as ecosystem engineers because of the large impacts their dam building activities have on the landscape; however, the benefits they may provide to fluvial fish species has been debated. We conducted a watershed-scale experiment to test how increasing beaver dam and colony persistence in a highly degraded incised stream affects(More)
• Summer stream temperatures were monitored in 49 forested watersheds on the western Olympic Peninsula, Washington, as part of the Department of Natural Resources Habitat Conservation Plan long-term monitoring efforts. Most of these streams were in DNR's Olympic Experimental State Forest. Because a major aquatic conservation goal of the HCP is to return(More)
Physiologic data obtained from infants and children in shock indicate that there is a high frequency of abnormalities that can only be discovered with pulmonary artery catheters. Cardiogenic shock is a low-output, high-resistance condition, and septic shock is a relatively high-output, low-resistance condition. The use of pulmonary artery catheter data(More)
Beaver are an integral component of hydrologic, geomorphic, and biotic processes within North American stream systems, and their propensity to build dams alters stream and riparian structure and function to the benefit of many aquatic and terrestrial species. Recognizing this, beaver relocation efforts and/or application of structures designed to mimic the(More)
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