University of New Hampshire View Institution's Website 7 articles published in JoVE Chemistry Application of Voltage in Dynamic Light Scattering Particle Size Analysis Tianyu Ren*1, Emma J. Roberge*2, John R. Csoros1, W. Rudolph Seitz1, Eva Rose M. Balog3, Jeffrey Mark Halpern2 1Department of Chemistry, University of New Hampshire, 2Department of Chemical Engineering, University of New Hampshire, 3Department of Chemistry and Physics, University of New England Here, a protocol to apply voltage to solution during dynamic light scattering particle size measurements with the intent to explore the effect of voltage and temperature changes on polymer aggregation is presented. Environment An Optimized Rhizobox Protocol to Visualize Root Growth and Responsiveness to Localized Nutrients Jennifer E. Schmidt1, Carolyn Lowry2, Amelie C.M. Gaudin1 1Department of Plant Sciences, University of California at Davis, 2Department of Natural Resources and the Environment, University of New Hampshire Visualizing and measuring root growth in situ is extremely challenging. We present a customizable rhizobox method to track root development and proliferation over time in response to nutrient enrichment. This method is used to analyze maize genotypic differences in root plasticity in response to an organic nitrogen source. Environment Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils Gregory B. Lawrence1, Ivan J. Fernandez2, Paul W. Hazlett3, Scott W. Bailey4, Donald S. Ross5, Thomas R. Villars6, Angelica Quintana7, Rock Ouimet8, Michael R. McHale1, Chris E. Johnson9, Russell D. Briggs10, Robert A. Colter11, Jason Siemion1, Olivia L. Bartlett12, Olga Vargas13, Michael R. Antidormi1, Mary M. Koppers9 1New York Water Science Center, U.S. Geological Survey, 2School of Forest Resources, University of Maine, 3Natural Resources Canada, Canadian Forest Service, 4Northern Research Station, U.S. Forest Service, 5Department of Plant and Soil Science, University of Vermont, 6Ottauquechee NRCD, USDA Natural Resources Conservation Service, 7Green Mountain National Forest, U.S. Forest Service, 8Direction de la Recherche Forestière, Ministère du Québec, 9Department of Civil and Environmental Engineering, Syracuse University, 10Division of Environmental Science, SUNY College of Environmental Science and Forestry, 11White Mountain National Forest, U.S. Forest Service, 12Natural Resources and Earth System Sciences, University of New Hampshire, 13Greenwich, NY Field Office, USDA Natural Resources Conservation Service Repeated soil sampling has recently been shown to be an effective way to monitor forest soil change over years and decades. To support its use, a protocol is presented that synthesizes the latest information on soil resampling methods to aid in the design and implementation of successful soil monitoring programs. Biology A Method for Extracting Pigments from Squid Doryteuthis pealeii Christopher W. DiBona1, Thomas L. Williams1, Sean R. Dinneen1, Stephanie F. Jones Labadie1, Leila F. Deravi1,2 1Department of Chemistry, University of New Hampshire, 2Materials Science Program, University of New Hampshire A protocol for the extraction of pigments from the nanostructured granules in squid Doryteuthis pealeii chromatophores is presented. Environment Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems Adam S. Wymore1, Bianca Rodríguez-Cardona1, William H. McDowell1 1Department of Natural Resources and the Environment, University of New Hampshire Dissolved organic matter provides an important source of energy and nutrients to stream ecosystems. Here we demonstrate a field-based method to manipulate the ambient pool of dissolved organic matter in situ through easily replicable nutrient pulses. Environment A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters (Homarus americanus) Jason S Goldstein1, Tracy L Pugh1,2, Elizabeth A Dubofsky1, Kari L Lavalli3, Michael Clancy4, Winsor H Watson III1 1Department of Biological Sciences, University of New Hampshire, 2Massachusetts Division of Marine Fisheries, 3Division of Natural Sciences & Mathematics, College of General Studies, Boston University, 4Rhode Island Nursing Institute, Middle College Fishery-induced changes to exploited crustacean fisheries, such as the American lobster fishery, could potentially influence their reproductive dynamics, leading to a reduction in mating success. This study's goal was to develop a noninvasive method for ascertaining the mating success of female lobsters that may be physiologically or functionally mature. Engineering Echo Particle Image Velocimetry Nicholas DeMarchi1, Christopher White1 1Mechanical Engineering Department, University of New Hampshire An echo particle image velocimetry (EPIV) system capable of acquiring two-dimensional fields of velocity in optically opaque fluids or through optically opaque geometries is described, and validation measurements in pipe flow are reported.
