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Glyphosate translocation in common lambsquarters (Chenopodium album) and velvetleaf (Abutilon theophrasti) in response to ammonium sulfate
- Bryan G. Young, Andrew W. Knepp, Loyd M. Wax, Stephen E. Hart
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- Journal:
- Weed Science / Volume 51 / Issue 2 / April 2003
- Published online by Cambridge University Press:
- 20 January 2017, pp. 151-156
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Greenhouse studies were conducted to determine the response of common lambsquarters and velvetleaf to glyphosate applied alone or with 20 g L−1 of ammonium sulfate (AMS). Minimal response of common lambsquarters to glyphosate plus AMS was observed. The GR50 values for velvetleaf decreased dramatically from 451 to 92 g ha−1 for glyphosate applied alone and glyphosate plus AMS, respectively. The addition of AMS did not affect foliar absorption of 14C-glyphosate in common lambsquarters but increased absorption in velvetleaf. A twofold increase in translocation, as a percentage of total 14C-glyphosate absorbed, occurred in velvetleaf with the addition of AMS. Increased control of velvetleaf with glyphosate plus AMS may be partially explained by greater glyphosate absorption and translocation. Increased translocation of glyphosate applied with AMS in velvetleaf was an indirect effect of greater foliar uptake as well as greater partitioning of glyphosate out of the treated leaf.
Contributors
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- By Mitchell Aboulafia, Frederick Adams, Marilyn McCord Adams, Robert M. Adams, Laird Addis, James W. Allard, David Allison, William P. Alston, Karl Ameriks, C. Anthony Anderson, David Leech Anderson, Lanier Anderson, Roger Ariew, David Armstrong, Denis G. Arnold, E. J. Ashworth, Margaret Atherton, Robin Attfield, Bruce Aune, Edward Wilson Averill, Jody Azzouni, Kent Bach, Andrew Bailey, Lynne Rudder Baker, Thomas R. Baldwin, Jon Barwise, George Bealer, William Bechtel, Lawrence C. Becker, Mark A. Bedau, Ernst Behler, José A. Benardete, Ermanno Bencivenga, Jan Berg, Michael Bergmann, Robert L. Bernasconi, Sven Bernecker, Bernard Berofsky, Rod Bertolet, Charles J. Beyer, Christian Beyer, Joseph Bien, Joseph Bien, Peg Birmingham, Ivan Boh, James Bohman, Daniel Bonevac, Laurence BonJour, William J. Bouwsma, Raymond D. Bradley, Myles Brand, Richard B. Brandt, Michael E. Bratman, Stephen E. Braude, Daniel Breazeale, Angela Breitenbach, Jason Bridges, David O. Brink, Gordon G. Brittan, Justin Broackes, Dan W. Brock, Aaron Bronfman, Jeffrey E. Brower, Bartosz Brozek, Anthony Brueckner, Jeffrey Bub, Lara Buchak, Otavio Bueno, Ann E. Bumpus, Robert W. Burch, John Burgess, Arthur W. Burks, Panayot Butchvarov, Robert E. Butts, Marina Bykova, Patrick Byrne, David Carr, Noël Carroll, Edward S. Casey, Victor Caston, Victor Caston, Albert Casullo, Robert L. Causey, Alan K. L. Chan, Ruth Chang, Deen K. Chatterjee, Andrew Chignell, Roderick M. Chisholm, Kelly J. Clark, E. J. Coffman, Robin Collins, Brian P. Copenhaver, John Corcoran, John Cottingham, Roger Crisp, Frederick J. Crosson, Antonio S. Cua, Phillip D. Cummins, Martin Curd, Adam Cureton, Andrew Cutrofello, Stephen Darwall, Paul Sheldon Davies, Wayne A. Davis, Timothy Joseph Day, Claudio de Almeida, Mario De Caro, Mario De Caro, John Deigh, C. F. Delaney, Daniel C. Dennett, Michael R. DePaul, Michael Detlefsen, Daniel Trent Devereux, Philip E. Devine, John M. Dillon, Martin C. Dillon, Robert DiSalle, Mary Domski, Alan Donagan, Paul Draper, Fred Dretske, Mircea Dumitru, Wilhelm Dupré, Gerald Dworkin, John Earman, Ellery Eells, Catherine Z. Elgin, Berent Enç, Ronald P. Endicott, Edward Erwin, John Etchemendy, C. Stephen Evans, Susan L. Feagin, Solomon Feferman, Richard Feldman, Arthur Fine, Maurice A. Finocchiaro, William FitzPatrick, Richard E. Flathman, Gvozden Flego, Richard Foley, Graeme Forbes, Rainer Forst, Malcolm R. Forster, Daniel Fouke, Patrick Francken, Samuel Freeman, Elizabeth Fricker, Miranda Fricker, Michael Friedman, Michael Fuerstein, Richard A. Fumerton, Alan Gabbey, Pieranna Garavaso, Daniel Garber, Jorge L. A. Garcia, Robert K. Garcia, Don Garrett, Philip Gasper, Gerald Gaus, Berys Gaut, Bernard Gert, Roger F. Gibson, Cody Gilmore, Carl Ginet, Alan H. Goldman, Alvin I. Goldman, Alfonso Gömez-Lobo, Lenn E. Goodman, Robert M. Gordon, Stefan Gosepath, Jorge J. E. Gracia, Daniel W. Graham, George A. Graham, Peter J. Graham, Richard E. Grandy, I. Grattan-Guinness, John Greco, Philip T. Grier, Nicholas Griffin, Nicholas Griffin, David A. Griffiths, Paul J. Griffiths, Stephen R. Grimm, Charles L. Griswold, Charles B. Guignon, Pete A. Y. Gunter, Dimitri Gutas, Gary Gutting, Paul Guyer, Kwame Gyekye, Oscar A. Haac, Raul Hakli, Raul Hakli, Michael Hallett, Edward C. Halper, Jean Hampton, R. James Hankinson, K. R. Hanley, Russell Hardin, Robert M. Harnish, William Harper, David Harrah, Kevin Hart, Ali Hasan, William Hasker, John Haugeland, Roger Hausheer, William Heald, Peter Heath, Richard Heck, John F. Heil, Vincent F. Hendricks, Stephen Hetherington, Francis Heylighen, Kathleen Marie Higgins, Risto Hilpinen, Harold T. Hodes, Joshua Hoffman, Alan Holland, Robert L. Holmes, Richard Holton, Brad W. Hooker, Terence E. Horgan, Tamara Horowitz, Paul Horwich, Vittorio Hösle, Paul Hoβfeld, Daniel Howard-Snyder, Frances Howard-Snyder, Anne Hudson, Deal W. Hudson, Carl A. Huffman, David L. Hull, Patricia Huntington, Thomas Hurka, Paul Hurley, Rosalind Hursthouse, Guillermo Hurtado, Ronald E. Hustwit, Sarah Hutton, Jonathan Jenkins Ichikawa, Harry A. Ide, David Ingram, Philip J. Ivanhoe, Alfred L. Ivry, Frank Jackson, Dale Jacquette, Joseph Jedwab, Richard Jeffrey, David Alan Johnson, Edward Johnson, Mark D. Jordan, Richard Joyce, Hwa Yol Jung, Robert Hillary Kane, Tomis Kapitan, Jacquelyn Ann K. Kegley, James A. Keller, Ralph Kennedy, Sergei Khoruzhii, Jaegwon Kim, Yersu Kim, Nathan L. King, Patricia Kitcher, Peter D. Klein, E. D. Klemke, Virginia Klenk, George L. Kline, Christian Klotz, Simo Knuuttila, Joseph J. Kockelmans, Konstantin Kolenda, Sebastian Tomasz Kołodziejczyk, Isaac Kramnick, Richard Kraut, Fred Kroon, Manfred Kuehn, Steven T. Kuhn, Henry E. Kyburg, John Lachs, Jennifer Lackey, Stephen E. Lahey, Andrea Lavazza, Thomas H. Leahey, Joo Heung Lee, Keith Lehrer, Dorothy Leland, Noah M. Lemos, Ernest LePore, Sarah-Jane Leslie, Isaac Levi, Andrew Levine, Alan E. Lewis, Daniel E. Little, Shu-hsien Liu, Shu-hsien Liu, Alan K. L. Chan, Brian Loar, Lawrence B. Lombard, John Longeway, Dominic McIver Lopes, Michael J. Loux, E. J. Lowe, Steven Luper, Eugene C. Luschei, William G. Lycan, David Lyons, David Macarthur, Danielle Macbeth, Scott MacDonald, Jacob L. Mackey, Louis H. Mackey, Penelope Mackie, Edward H. Madden, Penelope Maddy, G. B. Madison, Bernd Magnus, Pekka Mäkelä, Rudolf A. Makkreel, David Manley, William E. Mann (W.E.M.), Vladimir Marchenkov, Peter Markie, Jean-Pierre Marquis, Ausonio Marras, Mike W. Martin, A. P. Martinich, William L. McBride, David McCabe, Storrs McCall, Hugh J. McCann, Robert N. McCauley, John J. McDermott, Sarah McGrath, Ralph McInerny, Daniel J. McKaughan, Thomas McKay, Michael McKinsey, Brian P. McLaughlin, Ernan McMullin, Anthonie Meijers, Jack W. Meiland, William Jason Melanson, Alfred R. Mele, Joseph R. Mendola, Christopher Menzel, Michael J. Meyer, Christian B. Miller, David W. Miller, Peter Millican, Robert N. Minor, Phillip Mitsis, James A. Montmarquet, Michael S. Moore, Tim Moore, Benjamin Morison, Donald R. Morrison, Stephen J. Morse, Paul K. Moser, Alexander P. D. Mourelatos, Ian Mueller, James Bernard Murphy, Mark C. Murphy, Steven Nadler, Jan Narveson, Alan Nelson, Jerome Neu, Samuel Newlands, Kai Nielsen, Ilkka Niiniluoto, Carlos G. Noreña, Calvin G. Normore, David Fate Norton, Nikolaj Nottelmann, Donald Nute, David S. Oderberg, Steve Odin, Michael O’Rourke, Willard G. Oxtoby, Heinz Paetzold, George S. Pappas, Anthony J. Parel, Lydia Patton, R. P. Peerenboom, Francis Jeffry Pelletier, Adriaan T. Peperzak, Derk Pereboom, Jaroslav Peregrin, Glen Pettigrove, Philip Pettit, Edmund L. Pincoffs, Andrew Pinsent, Robert B. Pippin, Alvin Plantinga, Louis P. Pojman, Richard H. Popkin, John F. Post, Carl J. Posy, William J. Prior, Richard Purtill, Michael Quante, Philip L. Quinn, Philip L. Quinn, Elizabeth S. Radcliffe, Diana Raffman, Gerard Raulet, Stephen L. Read, Andrews Reath, Andrew Reisner, Nicholas Rescher, Henry S. Richardson, Robert C. Richardson, Thomas Ricketts, Wayne D. Riggs, Mark Roberts, Robert C. Roberts, Luke Robinson, Alexander Rosenberg, Gary Rosenkranz, Bernice Glatzer Rosenthal, Adina L. Roskies, William L. Rowe, T. M. Rudavsky, Michael Ruse, Bruce Russell, Lilly-Marlene Russow, Dan Ryder, R. M. Sainsbury, Joseph Salerno, Nathan Salmon, Wesley C. Salmon, Constantine Sandis, David H. Sanford, Marco Santambrogio, David Sapire, Ruth A. Saunders, Geoffrey Sayre-McCord, Charles Sayward, James P. Scanlan, Richard Schacht, Tamar Schapiro, Frederick F. Schmitt, Jerome B. Schneewind, Calvin O. Schrag, Alan D. Schrift, George F. Schumm, Jean-Loup Seban, David N. Sedley, Kenneth Seeskin, Krister Segerberg, Charlene Haddock Seigfried, Dennis M. Senchuk, James F. Sennett, William Lad Sessions, Stewart Shapiro, Tommie Shelby, Donald W. Sherburne, Christopher Shields, Roger A. Shiner, Sydney Shoemaker, Robert K. Shope, Kwong-loi Shun, Wilfried Sieg, A. John Simmons, Robert L. Simon, Marcus G. Singer, Georgette Sinkler, Walter Sinnott-Armstrong, Matti T. Sintonen, Lawrence Sklar, Brian Skyrms, Robert C. Sleigh, Michael Anthony Slote, Hans Sluga, Barry Smith, Michael Smith, Robin Smith, Robert Sokolowski, Robert C. Solomon, Marta Soniewicka, Philip Soper, Ernest Sosa, Nicholas Southwood, Paul Vincent Spade, T. L. S. Sprigge, Eric O. Springsted, George J. Stack, Rebecca Stangl, Jason Stanley, Florian Steinberger, Sören Stenlund, Christopher Stephens, James P. Sterba, Josef Stern, Matthias Steup, M. A. Stewart, Leopold Stubenberg, Edith Dudley Sulla, Frederick Suppe, Jere Paul Surber, David George Sussman, Sigrún Svavarsdóttir, Zeno G. Swijtink, Richard Swinburne, Charles C. Taliaferro, Robert B. Talisse, John Tasioulas, Paul Teller, Larry S. Temkin, Mark Textor, H. S. Thayer, Peter Thielke, Alan Thomas, Amie L. Thomasson, Katherine Thomson-Jones, Joshua C. Thurow, Vzalerie Tiberius, Terrence N. Tice, Paul Tidman, Mark C. Timmons, William Tolhurst, James E. Tomberlin, Rosemarie Tong, Lawrence Torcello, Kelly Trogdon, J. D. Trout, Robert E. Tully, Raimo Tuomela, John Turri, Martin M. Tweedale, Thomas Uebel, Jennifer Uleman, James Van Cleve, Harry van der Linden, Peter van Inwagen, Bryan W. Van Norden, René van Woudenberg, Donald Phillip Verene, Samantha Vice, Thomas Vinci, Donald Wayne Viney, Barbara Von Eckardt, Peter B. M. Vranas, Steven J. Wagner, William J. Wainwright, Paul E. Walker, Robert E. Wall, Craig Walton, Douglas Walton, Eric Watkins, Richard A. Watson, Michael V. Wedin, Rudolph H. Weingartner, Paul Weirich, Paul J. Weithman, Carl Wellman, Howard Wettstein, Samuel C. Wheeler, Stephen A. White, Jennifer Whiting, Edward R. Wierenga, Michael Williams, Fred Wilson, W. Kent Wilson, Kenneth P. Winkler, John F. Wippel, Jan Woleński, Allan B. Wolter, Nicholas P. Wolterstorff, Rega Wood, W. Jay Wood, Paul Woodruff, Alison Wylie, Gideon Yaffe, Takashi Yagisawa, Yutaka Yamamoto, Keith E. Yandell, Xiaomei Yang, Dean Zimmerman, Günter Zoller, Catherine Zuckert, Michael Zuckert, Jack A. Zupko (J.A.Z.)
- Edited by Robert Audi, University of Notre Dame, Indiana
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- Book:
- The Cambridge Dictionary of Philosophy
- Published online:
- 05 August 2015
- Print publication:
- 27 April 2015, pp ix-xxx
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List of contributors
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- By Nazia M. Alam, Enrico Alleva, Hiroyuki Arakawa, Robert H. Benno, Fred G. Biddle, D. Caroline Blanchard, Robert J. Blanchard, Richard J. Bodnar, John D. Boughter, Igor Branchi, Richard E. Brown, Abel Bult-Ito, Jonathan M. Cachat, Peter R. Canavello, Francesca Cirulli, Giovanni Colacicco, John C. Crabbe, Jacqueline N. Crawley, Wim E. Crusio, Sietse F. de Boer, Ekrem Dere, Brenda A. Eales, Robert T. Gerlai, Howard K. Gershenfeld, Thomas J. Gould, Martin E. Hahn, Peter C. Hart, Andrew Holmes, Joseph P. Huston, Allan V. Kalueff, Benjamin Kest, Robert Lalonde, Sarah R. Lewis-Levy, Hans-Peter Lipp, Sheree F. Logue, Stephen C. Maxson, Jeffrey S. Mogil, Douglas A. Monks, Dennis L. Murphy, Lee Niel, Timothy P. O’Leary, Susanna Pietropaolo, Peter K.D. Pilz, Claudia F. Plappert, Bernard Possidente, Glen T. Prusky, Laura Ricceri, Heather Schellinck, Herbert Schwegler, Burton Slotnick, Frans Sluyter, Shad B. Smith, Catherine Strazielle, Douglas Wahlsten, Hans Welzl, James F. Willott, David P. Wolfer, Armin Zlomuzica
- Edited by Wim E. Crusio, Université de Bordeaux, Frans Sluyter, Robert T. Gerlai, University of Toronto, Susanna Pietropaolo, Université de Bordeaux
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- Book:
- Behavioral Genetics of the Mouse
- Published online:
- 05 May 2013
- Print publication:
- 25 April 2013, pp ix-xii
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Contributors
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- By Nozomi Akanuma, Gonzalo Alarcón, R. Arunachalam, Sarah H. Bernard, Frank M. C. Besag, Istvan Bodi, Stephen Brown, Franz Brunnhuber, Antonella Cerquiglini, J. Helen Cross, R. Shane Delamont, Archana Desurkar, Lee Drummond, Rona Eade, Robert D. C. Elwes, Bidi Evans, Peter Fenwick, Colin D. Ferrie, Paul L. Furlong, Laura H. Goldstein, Sally Gomersall, Sushma Goyal, Jane Hanna, Yvonne Hart, Dominic C. Heaney, Graham E. Holder, Mrinalini Honavar, Elaine Hughes, Jozef M. Jarosz, John G. R. Jefferys, Jane Juler, Mathias Koepp, Michalis Koutroumanidis, Maureen Lahiff, Louis Lemieux, David McCormick, Brian Meldrum, John D. C. Mellers, Nicholas Moran, John Moriarty, Robin G. Morris, Nandini Mullatti, Lina Nashef, Jennifer Nightingale, T. J. von Oertzen, Corina O'Neill, Philip N. Patsalos, Stella Pearson, Charles E. Polkey, Ronit Pressler, Edward H. Reynolds, Mark P. Richardson, Leone Ridsdale, Robert Robinson, Greg Rogers, Euan M. Ross, Richard P. Selway, Stefano Seri, Simeran Sharma, Graeme J. Sills, Andrew Simmons, Shiri Spector, Mark Stevenson, Jade N. Thai, Brian Toone, Antonio Valentín, Nuria T. Villagra, Matthew Walker, William Whitehouse
- Edited by Gonzalo Alarcón, King's College London, Antonio Valentín, King's College London
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- Book:
- Introduction to Epilepsy
- Published online:
- 05 July 2012
- Print publication:
- 26 April 2012, pp xii-xv
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A simple maximization model inspired by algorithms for the organization of genetic candidates in bacterial DNA
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- Andrew G. Hart, Servet Martínez, Leonardo Videla
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- Journal:
- Advances in Applied Probability / Volume 38 / Issue 4 / December 2006
- Published online by Cambridge University Press:
- 08 September 2016, pp. 1071-1097
- Print publication:
- December 2006
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We propose a simple model for interaction between gene candidates in the two strands of bacterial DNA (deoxyribonucleic acid). Our model assumes that ‘final’ genes appear in one of the two strands, that they do not overlap (in bacteria there is only a small percentage of overlap), and that the final genes maximize the occupancy rate, which is defined to be the proportion of the genome occupied by coding zones. We are more concerned with describing the organization and distribution of genes in bacterial DNA than with the very hard problem of identifying genes. To this end, an algorithm for selecting the final genes according to the previously outlined maximization criterion is proposed. We study the graphical and probabilistic properties of the model resulting from applying the maximization procedure to a Markovian representation of the genic and intergenic zones within the DNA strands, develop theoretical bounds on the occupancy rate (which, in our view, is a rather intractable quantity), and use the model to compute quantities of relevance to the Escherichia coli genome and compare these to annotation data. Although this work focuses on genomic modelling, we point out that the proposed model is not restricted to applications in this setting. It also serves to model other resource allocation problems.
Circum-Antarctic coastal environmental shifts during the Late Quaternary reflected by emerged marine deposits
- Paul A. Berkman, John T. Andrews, Svante Björck, Eric A. Colhoun, Steven D. Emslie, Ian D. Goodwin, Brenda L. Hall, Charles P. Hart, Kazuomi Hirakawa, Atsuo Igarashi, Olafur Ingólfsson, Jeronimo López-Martínez, W. Berry Lyons, Mark C.G. Mabin, Patrick G. Quilty, Marco Taviani, Yoshio Yoshida
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- Journal:
- Antarctic Science / Volume 10 / Issue 3 / September 1998
- Published online by Cambridge University Press:
- 07 May 2004, pp. 345-362
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This review assesses the circumpolar occurrence of emerged marine macrofossils and sediments from Antarctic coastal areas in relation to Late Quaternary climate changes. Radiocarbon ages of the macrofossils, which are interpreted in view of the complexities of the Antarctic marine radiocarbon reservoir and resolution of this dating technique, show a bimodal distribution. The data indicate that marine species inhabited coastal environments from at least 35 000 to 20 000 yr BP, during Marine Isotope Stage 3 when extensive iceberg calving created a ‘meltwater lid’ over the Southern Ocean. The general absence of these marine species from 20 000 to 8500 yr BP coincides with the subsequent advance of the Antarctic ice sheets during the Last Glacial Maximum. Synchronous re-appearance of the Antarctic marine fossils in emerged beaches around the continent, all of which have Holocene marine-limit elevations an order of magnitude lower than those in the Arctic, reflect minimal isostatic rebound as relative sea-level rise decelerated. Antarctic coastal marine habitat changes around the continent also coincided with increasing sea-ice extent and outlet glacial advances during the mid-Holocene. In view of the diverse environmental changes that occurred around the Earth during this period, it is suggested that Antarctic coastal areas were responding to a mid-Holocene climatic shift associated with the hydrological cycle. This synthesis of Late Quaternary emerged marine deposits demonstrates the application of evaluating circum-Antarctic phenomena from the glacial-terrestrial-marine transition zone.
The λ-classification of continuous-time birth-and-death processes
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- Andrew G. Hart, Servet Martínez, Jaime San Martín
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- Journal:
- Advances in Applied Probability / Volume 35 / Issue 4 / December 2003
- Published online by Cambridge University Press:
- 01 July 2016, pp. 1111-1130
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- December 2003
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We study the λ-classification of absorbing birth-and-death processes, giving necessary and sufficient conditions for such processes to be λ-transient, λ-null recurrent and λ-positive recurrent.
Dietary cholesterol reduces lipoprotein lipase activity in the atherosclerosis-susceptible Bio F1B hamster
- Martina A. McAteer, David C. Grimsditch, Martin Vidgeon-Hart, G. Martin Benson, Andrew M. Salter
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- Journal:
- British Journal of Nutrition / Volume 89 / Issue 3 / March 2003
- Published online by Cambridge University Press:
- 09 March 2007, pp. 341-350
- Print publication:
- March 2003
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We have compared lipoprotein metabolism in, and susceptibility to atherosclerosis of, two strains of male Golden Syrian hamster, the Bio F1B hybrid and the dominant spot normal inbred (DSNI) strain. When fed a normal low-fat diet containing approximately 40 g fat and 0·3 g cholestero/g, triacylglycerol-rich lipoprotein (chylomicron+VLDL) and HDL-cholesterol were significantly higher (P<0·001) in Bio F1B hamsters than DSNI hamsters. When this diet was supplemented with 150 g coconut oil and either 0·5 or 5·0 g cholestero/g, significant differences were seen in response. In particular, the high-cholesterol diet produced significantly greater increases in plasma cholesterol and triacylglycerol in the Bio F1B compared with the DSNI animals (P=0·002 and P<0·001 for cholesterol and triacylglycerol, respectively). This was particularly dramatic in non-fasting animals, suggesting an accumulation of chylomicrons. In a second experiment, animals were fed 150 g coconut oi/g and 5·0 g cholestero/g for 6 and 12 months. Again, the Bio F1B animals showed dramatic increases in plasma cholesterol and triacylglycerol, and this was confirmed as primarily due to a rise in chylomicron concentration. Post-heparin lipoprotein lipase activity was significantly reduced (P<0·001) in the Bio F1B compared with the DSNI animals at 6 months, and virtually absent at 12 months. Bio F1B animals were also shown to develop significantly more (P<0·001) atherosclerosis. These results indicate that, in the Bio F1B hybrid hamster, cholesterol feeding reduces lipoprotein lipase activity, thereby causing the accumulation of chylomicrons that may be associated with their increased susceptibility to atherosclerosis.
Effect of feedback signal and psychological characteristics on blood pressure self-manipulation capability
- Saroj K. L. Lal, Robyn J. Henderson, Norman Carter, Andrew Bath, Michael G. Hart, Pauline Langeluddecke, Stephen N. Hunyor
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- Journal:
- Psychophysiology / Volume 35 / Issue 4 / July 1998
- Published online by Cambridge University Press:
- 01 July 1998, pp. 405-412
- Print publication:
- July 1998
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Blood pressure presentation mode and personality are likely to influence biofeedback outcome. Thirty-six normotensive subjects were randomly assigned to visual or auditory continuous systolic feedback. “Distracting speech” and “broad band noise” were also superimposed and the effect on the biofeedback response was investigated. Psychological influence was also investigated. Systolic pressure reductions of 4 ± 4.3 mmHg (visual, p = .04) and 5 ± 5.5 mmHg (visual + auditory, p = .03) were achieved compared with auditory feedback (2 ± 4.7 mmHg), which was less effective. The addition of noise or speech had no effect on the systolic response, but speech adversely affected diastolic reduction (p = .04). Mood (p = .003) was associated with systolic lowering, whereas increased trait anxiety (p = .06) and expectation (p = .03) had trends for opposite effects. Increased anger-hostility, state-anxiety, and expectation (p = .06) had links with systolic raising capability. We conclude that feedback modality and psychological characteristics have implications for studies investigating blood pressure manipulation capability.
Effect of feedback signal and psychological characteristics on blood pressure self-manipulation capability
- SAROJ K.L. LAL, ROBYN J. HENDERSON, NORMAN CARTER, ANDREW BATH, MICHAEL G. HART, PAULINE LANGELUDDECKE, STEPHEN N. HUNYOR
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- Journal:
- Psychophysiology / Volume 35 / Issue 4 / July 1998
- Published online by Cambridge University Press:
- 01 July 1998, pp. 405-412
- Print publication:
- July 1998
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Blood pressure presentation mode and personality are likely to influence biofeedback outcome. Thirty-six normotensive subjects were randomly assigned to visual or auditory continuous systolic feedback. “Distracting speech” and “broad band noise” were also superimposed and the effect on the biofeedback response was investigated. Psychological influence was also investigated. Systolic pressure reductions of 4 ± 4.3 mmHg (visual, p = .04) and 5 ± 5.5 mmHg (visual + auditory, p = .03) were achieved compared with auditory feedback (2 ± 4.7 mmHg), which was less effective. The addition of noise or speech had no effect on the systolic response, but speech adversely affected diastolic reduction (p = .04). Mood (p = .003) was associated with systolic lowering, whereas increased trait anxiety (p = .06) and expectation (p = .03) had trends for opposite effects. Increased anger-hostility, state-anxiety, and expectation (p = .06) had links with systolic raising capability. We conclude that feedback modality and psychological characteristics have implications for studies investigating blood pressure manipulation capability.