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1. Science goals and mission architecture of the Europa Lander mission concept

Author

Hand, Kevin P., Phillips, Cynthia B., Murray, Alison E., Garvin, James B., Maize, Earl H., Gibbs, Roger G., Reeves, Glenn, San Martin, A. Miguel, Tan-Wang, Grace H., Krajewski, Joel, Hurst, Kenneth, Crum, Ray, Kennedy, Brett A., McElrath, Timothy P., Gallon, John C., Sabahi, Dara, Thurman, Sam W., Goldstein, Barry, Estabrook, Polly, Lee, Steven W., Dooley, Jennifer A., Brinckerhoff, William B., Edgett, Kenneth S., German, Christopher R., Hoehler, Tori M., Hörst, Sarah M., Lunine, Jonathan I., Paranicas, Christopher, Nealson, Kenneth H., Smith, David E., Templeton, Alexis S., Russell, Michael J., Schmidt, Britney E., Christner, Brent C., Ehlmann, Bethany L., Hayes, Alexander, Rhoden, Alyssa, Willis, Peter, Yingst, R. Aileen, Craft, Kate, Cameron, Marissa E., Nordheim, Tom A., Pitesky, Jo, Scully, Jennifer, Hofgartner, Jason D., Sell, Steve W., Barltrop, Kevin J., Izraelevitz, Jacob, Brandon, Erik J., Seong, J., Jones, John-Paul, Pasalic, Jasmina, Billings, Keith J., Ruiz, John Paul, Bugga, Ratnakumar V., Graham, Dan, Arenas, L. A., Takeyama, Deidre, Drummond, Mai, Aghazarian, Hrand, Andersen, Allen J., Andersen, Kayla B., Anderson, E. W., Babuscia, Alessandra, Backes, Paul G., Bailey, Elizabeth S., Balentine, Daniel, Ballard, Christopher G., Berisford, Daniel F., Bhandari, Pradeep, Blackwood, Krys, Bolotin, Gary S., Bovre, Emilee A., Bowkett, Joseph, Boykins, Kobie T., Bramble, Michael S., Brice, Timothy M., Briggs, Paul, Brinkman, Alexander P., Brooks, Shawn M., Buffington, Brent B., Burns, Brandon, Cable, Morgan L., Campagnola,Stefano, Cangahuala, Laureano A., Carr, Gregory A., Casani, John R., Chahat, Nacer E., Chamberlain-Simon, Brendan K., Cheng, Yun-Ting, Chien, Steve A., Cook, B. T., Cooper, Moogega, Dinicola, Michael, Clement, Brian G., Dean, Zachary S., Cullimore, Emily A., Curtis, Aaron G., de la Croix, Jean-Pierre, Di Pasquale, Peter, Dodd, Emma M., Dubord, Luke A., Edlund, Jeffrey A., Ellyin, Raymond, Emanuel, Blair, Foster, Jeffrey T., Ganino, Anthony J., Garner, Gregory J., Gibson, Matt T., Gildner, Matt, Glazebrook, Kenneth J., Greco, Martin E., Green, W. M., Hatch, Sara J., Hetzel, Mark M., Hoey, William A., Hofmann, Amy E., Ionasescu, Rodica, Jain, Abhinandan, Jasper, Jay D., Johannesen, Jennie R., Johnson, Glenn K., Jun, Insoo, Katake, Anup B., Kim-Castet, So Young, Kim, David Inkyu, Kim, Wousik, Klonicki, Emily F., Kobeissi, Brad, Kobie, Bryan D., Kochocki, Joseph, Kokorowski, Michael, Kosberg, Jacob A., Kriechbaum, Kristopher, Kulkarni, Tejas P., Lam, Rebekah L., Landau, Damon F., Lattimore, Myra A., Laubach, Sharon L., Lawler, Christopher R., Lim, Grace, Li, Jui-Lin, Litwin, Todd E., Lo, Martin W., Logan, Cambria A., Maghasoudi, Elham, Mandrake, Lukas, Marchetti, Yuliya, Marteau, Eloise, Maxwell, Kimberly A., McNamee, John B., McIntyre, Ocean, Meacham, Michael, Melko, Joseph P., Mueller, Juergen, Muliere, David, Mysore, Aprameya, Nash, Jeremy, Ono, Masahiro, Parker, Jay M., Perkins, Rebecca C., Petropoulos, Anastassios E., Gaut, Aaron, Piette Gomez, Marie Y., Casillas, Raul Polit, Preudhomme, Michael, Pyrzak, Guy, Rapinchuk, Jacqueline, Ratliff, John Martin, Ray, T. L., Roberts, Eric T., Roffo, Kenneth, Roth, Duane C., Russino, Joseph A., Schmidt, Tyler M., Schoppers, Marcel J., Senent, Juan S., Serricchio, Fred, Sheldon, Douglas J., Shiraishi, Lori R., Shirvanian, James, Siegel, Katherine J., Singh, Gurjeet, Sirota, Allen R., Skulsky, Eli D., Stehly, Joseph S., Strange, Nathan J., Stevens, Sarah U., Sunada, Eric T., Tepsuporn, Scott P., Tosi, Luis Phillipe C., Trawny, Nikolas, Uchenik, Igor, Verma, Vandi, Volpe, Richard A., Wagner, Caleb T., Wang, D., Willson, Reg G., Wolff, John Luke, Wong, A. T., Zimmer, Aline K., Sukhatme, Kalyani G., Bago, Kevin A., Chen, Yang, Deardorff, Alyssa M., Kuch, Roger S., Lim, Christopher, Syvertson, Marguerite L., Arakaki, Genji A., Avila, Art, DeBruin, Kevin J., Frick, Andreas, Harris, Joby R., Heverly, Matthew C., Kawata, Jessie M., Kim‬, Sung-Kyun, Kipp, Devin M., Murphy, Juliana, Smith, Matthew W., Spaulding, Matthew D., Thakker, Rohan, Warner, Noah Z., Yahnker, Chris R., Young, M. E., Magner, Tom, Adams, Danica, Bedini, Peter, Mehr, Lauren, Sheldon, Colin, Vernon, Steven, Bailey, Vince, Briere, Marc, Butler, Michael, Davis, Amanda, Ensor, Susan, Gannon, Michele, Haapala-Chalk, Amanda, Hartka, Ted, Holdridge, Mark, Hong, Albert, Hunt, J., Iskow, Joe, Kahler, Faith, Murray, Kimberly, Napolillo, David, Norkus, Michael, Pfisterer, Rick, Porter, Jamie, Roth, David, Schwartz, Paul, Wolfarth, Lawrence, Cardiff, Eric, Davis, Anita, Grob, Eric W., Adam, Jason R., Betts, Erin, Norwood, Jason, Heller, M. M., Voskuilen, Tyler, Sakievich, Philip, Gray, L., Hansen, D. J., Irick, Kevin W., Hewson, John C., Lamb, Joshua, Stacy, S. C., Brotherton, Chris M., Tappan, Alexander S., Benally, Darryl, Thigpen, Hannah, Ortiz, Erick, Sandoval, Dan, Ison, Aaron M., Warren, M., Stromberg, Peter G., Thelen, Paul Mark, Blasy, B., Nandy, Prabal, Haddad, Alexandria W., Trujillo, Lynna B., Wiseley, T. H., Bell, S. A., Teske, Nicholas P., Post, C., Torres-Castro, Loraine, Grosso, Chris, Wasiolek, Maryla, Hand, Kevin P., Phillips, Cynthia B., Murray, Alison E., Garvin, James B., Maize, Earl H., Gibbs, Roger G., Reeves, Glenn, San Martin, A. Miguel, Tan-Wang, Grace H., Krajewski, Joel, Hurst, Kenneth, Crum, Ray, Kennedy, Brett A., McElrath, Timothy P., Gallon, John C., Sabahi, Dara, Thurman, Sam W., Goldstein, Barry, Estabrook, Polly, Lee, Steven W., Dooley, Jennifer A., Brinckerhoff, William B., Edgett, Kenneth S., German, Christopher R., Hoehler, Tori M., Hörst, Sarah M., Lunine, Jonathan I., Paranicas, Christopher, Nealson, Kenneth H., Smith, David E., Templeton, Alexis S., Russell, Michael J., Schmidt, Britney E., Christner, Brent C., Ehlmann, Bethany L., Hayes, Alexander, Rhoden, Alyssa, Willis, Peter, Yingst, R. Aileen, Craft, Kate, Cameron, Marissa E., Nordheim, Tom A., Pitesky, Jo, Scully, Jennifer, Hofgartner, Jason D., Sell, Steve W., Barltrop, Kevin J., Izraelevitz, Jacob, Brandon, Erik J., Seong, J., Jones, John-Paul, Pasalic, Jasmina, Billings, Keith J., Ruiz, John Paul, Bugga, Ratnakumar V., Graham, Dan, Arenas, L. A., Takeyama, Deidre, Drummond, Mai, Aghazarian, Hrand, Andersen, Allen J., Andersen, Kayla B., Anderson, E. W., Babuscia, Alessandra, Backes, Paul G., Bailey, Elizabeth S., Balentine, Daniel, Ballard, Christopher G., Berisford, Daniel F., Bhandari, Pradeep, Blackwood, Krys, Bolotin, Gary S., Bovre, Emilee A., Bowkett, Joseph, Boykins, Kobie T., Bramble, Michael S., Brice, Timothy M., Briggs, Paul, Brinkman, Alexander P., Brooks, Shawn M., Buffington, Brent B., Burns, Brandon, Cable, Morgan L., Campagnola,Stefano, Cangahuala, Laureano A., Carr, Gregory A., Casani, John R., Chahat, Nacer E., Chamberlain-Simon, Brendan K., Cheng, Yun-Ting, Chien, Steve A., Cook, B. T., Cooper, Moogega, Dinicola, Michael, Clement, Brian G., Dean, Zachary S., Cullimore, Emily A., Curtis, Aaron G., de la Croix, Jean-Pierre, Di Pasquale, Peter, Dodd, Emma M., Dubord, Luke A., Edlund, Jeffrey A., Ellyin, Raymond, Emanuel, Blair, Foster, Jeffrey T., Ganino, Anthony J., Garner, Gregory J., Gibson, Matt T., Gildner, Matt, Glazebrook, Kenneth J., Greco, Martin E., Green, W. M., Hatch, Sara J., Hetzel, Mark M., Hoey, William A., Hofmann, Amy E., Ionasescu, Rodica, Jain, Abhinandan, Jasper, Jay D., Johannesen, Jennie R., Johnson, Glenn K., Jun, Insoo, Katake, Anup B., Kim-Castet, So Young, Kim, David Inkyu, Kim, Wousik, Klonicki, Emily F., Kobeissi, Brad, Kobie, Bryan D., Kochocki, Joseph, Kokorowski, Michael, Kosberg, Jacob A., Kriechbaum, Kristopher, Kulkarni, Tejas P., Lam, Rebekah L., Landau, Damon F., Lattimore, Myra A., Laubach, Sharon L., Lawler, Christopher R., Lim, Grace, Li, Jui-Lin, Litwin, Todd E., Lo, Martin W., Logan, Cambria A., Maghasoudi, Elham, Mandrake, Lukas, Marchetti, Yuliya, Marteau, Eloise, Maxwell, Kimberly A., McNamee, John B., McIntyre, Ocean, Meacham, Michael, Melko, Joseph P., Mueller, Juergen, Muliere, David, Mysore, Aprameya, Nash, Jeremy, Ono, Masahiro, Parker, Jay M., Perkins, Rebecca C., Petropoulos, Anastassios E., Gaut, Aaron, Piette Gomez, Marie Y., Casillas, Raul Polit, Preudhomme, Michael, Pyrzak, Guy, Rapinchuk, Jacqueline, Ratliff, John Martin, Ray, T. L., Roberts, Eric T., Roffo, Kenneth, Roth, Duane C., Russino, Joseph A., Schmidt, Tyler M., Schoppers, Marcel J., Senent, Juan S., Serricchio, Fred, Sheldon, Douglas J., Shiraishi, Lori R., Shirvanian, James, Siegel, Katherine J., Singh, Gurjeet, Sirota, Allen R., Skulsky, Eli D., Stehly, Joseph S., Strange, Nathan J., Stevens, Sarah U., Sunada, Eric T., Tepsuporn, Scott P., Tosi, Luis Phillipe C., Trawny, Nikolas, Uchenik, Igor, Verma, Vandi, Volpe, Richard A., Wagner, Caleb T., Wang, D., Willson, Reg G., Wolff, John Luke, Wong, A. T., Zimmer, Aline K., Sukhatme, Kalyani G., Bago, Kevin A., Chen, Yang, Deardorff, Alyssa M., Kuch, Roger S., Lim, Christopher, Syvertson, Marguerite L., Arakaki, Genji A., Avila, Art, DeBruin, Kevin J., Frick, Andreas, Harris, Joby R., Heverly, Matthew C., Kawata, Jessie M., Kim‬, Sung-Kyun, Kipp, Devin M., Murphy, Juliana, Smith, Matthew W., Spaulding, Matthew D., Thakker, Rohan, Warner, Noah Z., Yahnker, Chris R., Young, M. E., Magner, Tom, Adams, Danica, Bedini, Peter, Mehr, Lauren, Sheldon, Colin, Vernon, Steven, Bailey, Vince, Briere, Marc, Butler, Michael, Davis, Amanda, Ensor, Susan, Gannon, Michele, Haapala-Chalk, Amanda, Hartka, Ted, Holdridge, Mark, Hong, Albert, Hunt, J., Iskow, Joe, Kahler, Faith, Murray, Kimberly, Napolillo, David, Norkus, Michael, Pfisterer, Rick, Porter, Jamie, Roth, David, Schwartz, Paul, Wolfarth, Lawrence, Cardiff, Eric, Davis, Anita, Grob, Eric W., Adam, Jason R., Betts, Erin, Norwood, Jason, Heller, M. M., Voskuilen, Tyler, Sakievich, Philip, Gray, L., Hansen, D. J., Irick, Kevin W., Hewson, John C., Lamb, Joshua, Stacy, S. C., Brotherton, Chris M., Tappan, Alexander S., Benally, Darryl, Thigpen, Hannah, Ortiz, Erick, Sandoval, Dan, Ison, Aaron M., Warren, M., Stromberg, Peter G., Thelen, Paul Mark, Blasy, B., Nandy, Prabal, Haddad, Alexandria W., Trujillo, Lynna B., Wiseley, T. H., Bell, S. A., Teske, Nicholas P., Post, C., Torres-Castro, Loraine, Grosso, Chris, and Wasiolek, Maryla

Abstract

© The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Hand, K., Phillips, C., Murray, A., Garvin, J., Maize, E., Gibbs, R., Reeves, G., San Martin, A., Tan-Wang, G., Krajewski, J., Hurst, K., Crum, R., Kennedy, B., McElrath, T., Gallon, J., Sabahi, D., Thurman, S., Goldstein, B., Estabrook, P., Lee, S. W., Dooley, J. A., Brinckerhoff, W. B., Edgett, K. S., German, C. R., Hoehler, T. M., Hörst, S. M., Lunine, J. I., Paranicas, C., Nealson, K., Smith, D. E., Templeton, A. S., Russell, M. J., Schmidt, B., Christner, B., Ehlmann, B., Hayes, A., Rhoden, A., Willis, P., Yingst, R. A., Craft, K., Cameron, M. E., Nordheim, T., Pitesky, J., Scully, J., Hofgartner, J., Sell, S. W., Barltrop, K. J., Izraelevitz, J., Brandon, E. J., Seong, J., Jones, J.-P., Pasalic, J., Billings, K. J., Ruiz, J. P., Bugga, R. V., Graham, D., Arenas, L. A., Takeyama, D., Drummond, M., Aghazarian, H., Andersen, A. J., Andersen, K. B., Anderson, E. W., Babuscia, A., Backes, P. G., Bailey, E. S., Balentine, D., Ballard, C. G., Berisford, D. F., Bhandari, P., Blackwood, K., Bolotin, G. S., Bovre, E. A., Bowkett, J., Boykins, K. T., Bramble, M. S., Brice, T. M., Briggs, P., Brinkman, A. P., Brooks, S. M., Buffington, B. B., Burns, B., Cable, M. L., Campagnola, S., Cangahuala, L. A., Carr, G. A., Casani, J. R., Chahat, N. E., Chamberlain-Simon, B. K., Cheng, Y., Chien, S. A., Cook, B. T., Cooper, M., DiNicola, M., Clement, B., Dean, Z., Cullimore, E. A., Curtis, A. G., Croix, J-P. de la, Pasquale, P. Di, Dodd, E. M., Dubord, L. A., Edlund, J. A., Ellyin, R., Emanuel, B., Foster, J. T., Ganino, A. J., Garner, G. J., Gibson, M. T., Gildner, M., Glazebrook, K. J., Greco, M. E., Green, W. M., Hatch, S. J., Hetzel, M. M., Hoey, W. A., Hofmann, A. E., Ionasescu, R., Jain, A., Jasper, J. D., Johannesen, J. R., Johnson, G. K., Jun, I., Katake, A. B., Kim-Castet, S. Y., Kim, D. I., Kim, W., Klonicki, E. F., Kobeis, Europa is a premier target for advancing both planetary science and astrobiology, as well as for opening a new window into the burgeoning field of comparative oceanography. The potentially habitable subsurface ocean of Europa may harbor life, and the globally young and comparatively thin ice shell of Europa may contain biosignatures that are readily accessible to a surface lander. Europa's icy shell also offers the opportunity to study tectonics and geologic cycles across a range of mechanisms and compositions. Here we detail the goals and mission architecture of the Europa Lander mission concept, as developed from 2015 through 2020. The science was developed by the 2016 Europa Lander Science Definition Team (SDT), and the mission architecture was developed by the preproject engineering team, in close collaboration with the SDT. In 2017 and 2018, the mission concept passed its mission concept review and delta-mission concept review, respectively. Since that time, the preproject has been advancing the technologies, and developing the hardware and software, needed to retire risks associated with technology, science, cost, and schedule., K.P.H., C.B.P., E.M., and all authors affiliated with the Jet Propulsion Laboratory carried out this research at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (grant No. 80NM0018D0004). J.I.L. was the David Baltimore Distinguished Visiting Scientist during the preparation of the SDT report. JPL/Caltech2021.

Published
2022

2. Science Goals and Mission Architecture of the Europa Lander Mission Concept

Author

Hand, K. P., primary, Phillips, C. B., additional, Murray, A., additional, Garvin, J. B., additional, Maize, E. H., additional, Gibbs, R. G., additional, Reeves, G., additional, Martin, A. M. San, additional, Tan-Wang, G. H., additional, Krajewski, J., additional, Hurst, K., additional, Crum, R., additional, Kennedy, B. A., additional, McElrath, T. P., additional, Gallon, J. C., additional, Sabahi, D., additional, Thurman, S. W., additional, Goldstein, B., additional, Estabrook, P., additional, Lee, S. W., additional, Dooley, J. A., additional, Brinckerhoff, W. B., additional, Edgett, K. S., additional, German, C. R., additional, Hoehler, T. M., additional, Hörst, S. M., additional, Lunine, J. I., additional, Paranicas, C., additional, Nealson, K., additional, Smith, D. E., additional, Templeton, A. S., additional, Russell, M. J., additional, Schmidt, B., additional, Christner, B., additional, Ehlmann, B., additional, Hayes, A., additional, Rhoden, A., additional, Willis, P., additional, Yingst, R. A., additional, Craft, K., additional, Cameron, M. E., additional, Nordheim, T., additional, Pitesky, J., additional, Scully, J., additional, Hofgartner, J., additional, Sell, S. W., additional, Barltrop, K. J., additional, Izraelevitz, J., additional, Brandon, E. J., additional, Seong, J., additional, Jones, J.-P., additional, Pasalic, J., additional, Billings, K. J., additional, Ruiz, J. P., additional, Bugga, R. V., additional, Graham, D., additional, Arenas, L. A., additional, Takeyama, D., additional, Drummond, M., additional, Aghazarian, H., additional, Andersen, A. J., additional, Andersen, K. B., additional, Anderson, E. W., additional, Babuscia, A., additional, Backes, P. G., additional, Bailey, E. S., additional, Balentine, D., additional, Ballard, C. G., additional, Berisford, D. F., additional, Bhandari, P., additional, Blackwood, K., additional, Bolotin, G. S., additional, Bovre, E. A., additional, Bowkett, J., additional, Boykins, K. T., additional, Bramble, M. S., additional, Brice, T. M., additional, Briggs, P., additional, Brinkman, A. P., additional, Brooks, S. M., additional, Buffington, B. B., additional, Burns, B., additional, Cable, M. L., additional, Campagnola, S., additional, Cangahuala, L. A., additional, Carr, G. A, additional, Casani, J. R., additional, Chahat, N. E., additional, Chamberlain-Simon, B. K., additional, Cheng, Y., additional, Chien, S. A., additional, Cook, B. T., additional, Cooper, M., additional, DiNicola, M., additional, Clement, B., additional, Dean, Z., additional, Cullimore, E. A., additional, Curtis, A. G., additional, Croix, J-P. de la, additional, Pasquale, P. Di, additional, Dodd, E. M., additional, Dubord, L. A., additional, Edlund, J. A., additional, Ellyin, R., additional, Emanuel, B., additional, Foster, J. T., additional, Ganino, A. J., additional, Garner, G. J., additional, Gibson, M. T., additional, Gildner, M., additional, Glazebrook, K. J., additional, Greco, M. E., additional, Green, W. M., additional, Hatch, S. J., additional, Hetzel, M. M., additional, Hoey, W. A., additional, Hofmann, A. E., additional, Ionasescu, R., additional, Jain, A., additional, Jasper, J. D., additional, Johannesen, J. R., additional, Johnson, G. K., additional, Jun, I., additional, Katake, A. B., additional, Kim-Castet, S. Y., additional, Kim, D. I., additional, Kim, W., additional, Klonicki, E. F., additional, Kobeissi, B., additional, Kobie, B. D., additional, Kochocki, J., additional, Kokorowski, M., additional, Kosberg, J. A., additional, Kriechbaum, K., additional, Kulkarni, T. P., additional, Lam, R. L., additional, Landau, D. F., additional, Lattimore, M. A., additional, Laubach, S. L., additional, Lawler, C. R., additional, Lim, G., additional, Lin, J. Y, additional, Litwin, T. E., additional, Lo, M. W., additional, Logan, C. A., additional, Maghasoudi, E., additional, Mandrake, L., additional, Marchetti, Y., additional, Marteau, E., additional, Maxwell, K. A., additional, Namee, J. B. Mc, additional, Mcintyre, O., additional, Meacham, M., additional, Melko, J. P., additional, Mueller, J., additional, Muliere, D. A., additional, Mysore, A., additional, Nash, J., additional, Ono, H., additional, Parker, J. M., additional, Perkins, R. C., additional, Petropoulos, A. E, additional, Gaut, A., additional, Gomez, M. Y. Piette, additional, Casillas, R. P., additional, Preudhomme, M., additional, Pyrzak, G., additional, Rapinchuk, J., additional, Ratliff, J. M., additional, Ray, T. L., additional, Roberts, E. T., additional, Roffo, K., additional, Roth, D. C., additional, Russino, J. A., additional, Schmidt, T. M., additional, Schoppers, M. J., additional, Senent, J. S., additional, Serricchio, F., additional, Sheldon, D. J., additional, Shiraishi, L. R., additional, Shirvanian, J., additional, Siegel, K. J., additional, Singh, G., additional, Sirota, A. R., additional, Skulsky, E. D., additional, Stehly, J. S., additional, Strange, N. J., additional, Stevens, S. U., additional, Sunada, E. T., additional, Tepsuporn, S. P., additional, Tosi, L. P. C., additional, Trawny, N., additional, Uchenik, I., additional, Verma, V., additional, Volpe, R. A., additional, Wagner, C. T., additional, Wang, D., additional, Willson, R. G., additional, Wolff, J. L., additional, Wong, A. T., additional, Zimmer, A. K., additional, Sukhatme, K. G., additional, Bago, K. A., additional, Chen, Y., additional, Deardorff, A. M., additional, Kuch, R. S., additional, Lim, C., additional, Syvertson, M. L., additional, Arakaki, G. A., additional, Avila, A., additional, DeBruin, K. J., additional, Frick, A., additional, Harris, J. R., additional, Heverly, M. C., additional, Kawata, J. M., additional, Kim, S.-K., additional, Kipp, D. M., additional, Murphy, J., additional, Smith, M. W., additional, Spaulding, M. D., additional, Thakker, R., additional, Warner, N. Z., additional, Yahnker, C. R., additional, Young, M. E., additional, Magner, T., additional, Adams, D., additional, Bedini, P., additional, Mehr, L., additional, Sheldon, C., additional, Vernon, S., additional, Bailey, V., additional, Briere, M., additional, Butler, M., additional, Davis, A., additional, Ensor, S., additional, Gannon, M., additional, Haapala-Chalk, A., additional, Hartka, T., additional, Holdridge, M., additional, Hong, A., additional, Hunt, J., additional, Iskow, J., additional, Kahler, F., additional, Murray, K., additional, Napolillo, D., additional, Norkus, M., additional, Pfisterer, R., additional, Porter, J., additional, Roth, D., additional, Schwartz, P., additional, Wolfarth, L., additional, Cardiff, E. H., additional, Grob, E. W., additional, Adam, J. R., additional, Betts, E., additional, Norwood, J., additional, Heller, M. M., additional, Voskuilen, T., additional, Sakievich, P., additional, Gray, L., additional, Hansen, D. J., additional, Irick, K. W., additional, Hewson, J. C., additional, Lamb, J., additional, Stacy, S. C., additional, Brotherton, C. M., additional, Tappan, A. S, additional, Benally, D., additional, Thigpen, H., additional, Ortiz, E., additional, Sandoval, D., additional, Ison, A. M., additional, Warren, M., additional, Stromberg, P. G., additional, Thelen, P. M., additional, Blasy, B., additional, Nandy, P., additional, Haddad, A. W., additional, Trujillo, L. B., additional, Wiseley, T. H., additional, Bell, S. A., additional, Teske, N. P., additional, Post, C., additional, Torres-Castro, L., additional, Grosso, C., additional, and Wasiolek, M., additional

Published
2022
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13. Repetitive trauma disorders: job evaluation and design.

Author

Armstrong, T J, Radwin, R G, Hansen, D J, and Kennedy, K W

Subjects
INDUSTRIAL safety, ARM injuries, COMPARATIVE studies, EXERCISE, RESEARCH methodology, MEDICAL cooperation, RESEARCH, WORK measurement, EVALUATION research, RELATIVE medical risk, JOB Descriptive Index, PREVENTION
Published
1986
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19. Classroom Notes

Author

Redheffer, R. M., primary, Hansen, D. J., additional, Stanaitis, O. E., additional, Barrett, Louis C., additional, and LaVita, James A., additional

Published
1964
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22. Early life-stage toxicity test methods for gulf toadfish (Opsanus beta) and results using chlorpyrifos.

Author

Hansen DJ, Goodman LR, Cripe GM, and Macauley SF

Subjects
Animals, Body Weight, Chlorpyrifos analysis, Chlorpyrifos metabolism, Seawater analysis, Water Pollutants, Chemical analysis, Chlorpyrifos toxicity, Fishes physiology, Water Pollutants toxicity, Water Pollutants, Chemical toxicity
Abstract

Gulf toadfish (Opsanus beta) were continuously exposed as embryos, sac fry, and juveniles to technical chlorpyrifos in two 49-day early life-stage toxicity tests. Survival was significantly (alpha = 0.05) reduced only in 150 micrograms/liter. However, toadfish exposed to chlorpyrifos concentrations from 3.7 to 150 micrograms/liter weighted significantly less than control fish: 9% lower in 3.7 micrograms/liter to 62% lower in 150 micrograms/liter. The 96-hr LC50 for juvenile fish was 520 micrograms/liter. Concentrations of chlorpyrifos in toadfish and bioconcentration factors increased with increasing exposure concentration, a condition not generally observed with other marine fishes and other test chemicals. These results demonstrated the procedures for, and the practicality of, early life-stage tests with this marine species. We recommend the use of the gulf toadfish for comparative toxicity testing and for evaluating the toxicity of substances in conjunction with ontogenetical, physiological, and histological investigations of this considerably studied genus. We do not recommend it for routine effects testing.

Published
1986
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23. A new early life-stage toxicity test using the California grunion (Leuresthes tenuis) and results with chlorpyrifos.

Author

Goodman LR, Hansen DJ, Cripe GM, Middaugh DP, and Moore JC

Subjects
Animals, Body Weight drug effects, Chlorpyrifos metabolism, Larva, Seawater analysis, Water Pollutants, Chemical analysis, Chlorpyrifos toxicity, Fishes physiology, Water Pollutants toxicity, Water Pollutants, Chemical toxicity
Abstract

California grunion were continuously exposed as embryos and fry to technical chlorpyrifos in two toxicity tests conducted in the same exposure apparatus. The first test, a 35-day early life-stage (ELS) test, began with approximately 2.5-day-old embryos that were exposed in flow-through aquaria in darkness until hatching was stimulated on Day 9 of exposure. The second toxicity test, a fry test, began with newly hatched fry and lasted 26 days. Test water temperature ranged from 23 to 26 degrees C and salinity from 24.5 to 34.0%. Results of the two tests were similar, indicating that exposure of embryos added little to the overall toxicity of chlorpyrifos to grunions. Percentage hatch of embryos was unaffected by the chlorpyrifos concentrations tested. Fry survival was apparently reduced in nominal concentrations greater than or equal to 1.0 micrograms/liter in both tests, but significantly so in concentrations greater than or equal to 1.0 micrograms/liter in the ELS test and greater than or equal to 2.0 micrograms/liter in the fry test. When compared with carrier controls, mean fish weights were significantly reduced in nominal chlorpyrifos concentrations greater than or equal to 0.5 micrograms/liter in the ELS test and greater than or equal to 1.0 micrograms/liter in the fry exposure. Mean bioconcentration factors were 770X for fish that survived the ELS test and 190X for those that survived the fry test. Results demonstrate the practicality of conducting ELS tests for the first time with a marine fish from the Pacific coastal waters of the United States.

Published
1985
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25. Ethylene-induced Tropism of Trifolium fragiferum L. Stolons.

Author

Hansen DJ and Bendixen LE

Abstract

The hypothesis that ethylene regulates prostrate stem growth was investigated using stolons of strawberry clover (Trifolium fragiferum L. var. Salina). Stolons became erect when treated with ethylene or 2-chloroethylphosphonic acid. Curvature was visibly detectable 2 hours after ethylene treatment, and subsequent stem elongation was rapid. Indoleacetic acid application to prostrate stolons caused only a small transitory curvature persisting less than 48 hours. Indoleacetic acid-stimulated curvature was accompanied by an increase in ethylene evolution. When stolon curvature was induced by placing strawberry clover plants in darkness or by applying gibberellic acid, ethylene production did not parallel stolon curvature.

Published
1974
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