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Environment

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Displaying 101 - 125 of 1014

Properties of Refrigerants

June 22, 2022
Author(s)
Marcia L. Huber, Mark O. McLinden
This table gives physical properties, safe exposure limits, GWP and ODP for compounds that have been used as working fluids in traditional refrigeration systems or are under consideration as replacements in newer systems. Some are also used as solvents

Potentiometric Rotating Ring Disk Electrode (RRDE) Study of Interfacial pH during CO2 Reduction and H2 Generation in Neutral and Weakly Acidic Media

April 21, 2022
Author(s)
Thomas P. Moffat, Nicole Ritzert, David Raciti, Brian Tackett, Nicholas Brady
Electrocatalytic reduction of CO2 to CO in aqueous media offers an important path to more sustainable carbon utilization. Optimization of this process relies on a detailed understanding of the dynamics of boundary layer chemistry, e.g., pH, adjacent to the

Design and Demonstration of a Low Field Magnetic Resonance Imaging Rhizotron for In-Field Imaging of Energy Sorghum Roots

March 21, 2022
Author(s)
George Bagnall, Stephen Altobelli, Mark Conradi, Hilary Fabich, Eiichi Fukushima, Neha Koonjoo, Dean Kuethe, William Rooney, Karl Stupic, Bragi Sveinsson, Brock Weers, NITHYA RAJAN, Matthew Rosen, Cristine Morgan
Advances in plant root phenotyping will play a crucial role in the development of modern crop varieties for fostering sustainable agriculture. Root phenotyping provides critical information to plant breeders for developing varieties with improved drought

Working fluid selection for heat pumps in solar district heating systems

March 10, 2022
Author(s)
Shengqing Xiao, Dimitri Nefodov, Mark O. McLinden, Markus Richter, Thorsten Urbaneck
In the context of the global energy transition, solar energy holds a promising potential as an energy source for a sustainable heat supply. Solar thermal collector in combination with heat pump technology utilizing electricity from renewable sources, such

New International Formulation for the Thermal Conductivity of Heavy Water

March 9, 2022
Author(s)
Marcia L. Huber, Richard A. Perkins, Marc Assael, Stella Monogenidou, Robert Hellmann, Jan Sengers
The International Association for the Properties of Water and Steam (IAPWS) has adopted a new formulation for the thermodynamic properties of heavy water. This manuscript describes the development of a new correlation for the thermal conductivity of heavy

Life Cycle Environmental Impacts of Plastics: A Review

March 1, 2022
Author(s)
Paul Rikhter, Ilayda Dinc, Yirui Zhang, Ted Jiang, Bobby Miyashiro, Shelby Walsh, Ruoyu Wang, Yvonne Dinh, Sangwon Suh, Joshua D. Kneifel
Global production and consumption of plastics and its deposition in the environment are growing rapidly, while their life-cycle impacts to the environment are yet to be fully understood. This study reviews the existing literature with the goal of

Temporal tends of persistent organic pollutants in Sarasota Bay common bottlenose dolphins (Tursiops truncatus)

February 17, 2022
Author(s)
John Kucklick, Ashley Boggs-Russell, Kevin Huncik, Amanda Moors, Elizabeth Davis, Gina Ylitalo, Mary McConnell, Christina Makris, Randall Wells
Legacy persistent organic pollutants (POPs) were measured in blubber samples collected from 196 common bottlenose dolphins (Tursiops truncatus) during 2000 to 2016 in the Sarasota Bay, Florida, ecosystem. Legacy POPs included polychlorinated biphenyl

Silicone tube humidity generator

February 16, 2022
Author(s)
Robert F. Berg, Nicola Chiodo, Eric Georgin
We describe the model and construction of a two-flow (or divided-flow) humidity generator, developed at LNE-CNAM, that uses mass flow controllers to mix a stream of dry gas with a stream of humid gas saturated at 28 °C. It can generate a wide range of

Quantification of urban biogenic carbon fluxes using bottom-up inventory and satellite-based model

January 5, 2022
Author(s)
Joy Winbourne, Hrstiana Stoynova, Ian Smith, Conor Gately, Barry Logan, Jaret Reblin, Andrew Reinmann, David W. Allen, Lucy Hutyra
Cities across the globe are taking the lead on climate mitigation action with ambitious goals to reduce carbon dioxide (CO2) emissions. The implementation of effective mitigation policies will require accurate measurements to guide policy decisions and

Disposition of Fluorine on New Firefighter Turnout Gear: Implications for Occupational Exposure

December 27, 2021
Author(s)
Derek Muensterman, Ivan Titaley, Graham Peaslee, Leah Minc, Liliana Cahuas, Alix Rodowa, Yuki Horiuchi, Shogo Yamane, Thierry Fouquet, John Kissel, Courtney Carignan, Jennifer Field
Firefighter turnout gear is essential for reducing occupational exposure to hazardous chemicals during training and fire events. Per-and polyfluoroalkyl substances (PFASs) are observed in firefighter serum, and possible occupational sources include the air