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Your search keyword '"M. A. K. Jansen"' showing total 6 results
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6 results on '"M. A. K. Jansen"'

1. The Montreal Protocol and the fate of environmental plastic debris

Author

M. A. K. Jansen, P. W. Barnes, J. F. Bornman, K. C. Rose, S. Madronich, C. C. White, R. G. Zepp, and A. L. Andrady

Subjects
Physical and Theoretical Chemistry
Abstract

Microplastics (MPs) are an emerging class of pollutants in air, soil and especially in all aquatic environments. Secondary MPs are generated in the environment during fragmentation of especially photo-oxidised plastic litter. Photo-oxidation is mediated primarily by solar UV radiation. The implementation of the Montreal Protocol and its Amendments, which have resulted in controlling the tropospheric UV-B (280–315 nm) radiation load, is therefore pertinent to the fate of environmental plastic debris. Due to the Montreal Protocol high amounts of solar UV-B radiation at the Earth’s surface have been avoided, retarding the oxidative fragmentation of plastic debris, leading to a slower generation and accumulation of MPs in the environment. Quantifying the impact of the Montreal Protocol in reducing the abundance of MPs in the environment, however, is complicated as the role of potential mechanical fragmentation of plastics under environmental mechanical stresses is poorly understood.

Published
2023
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3. The UVB photoreceptor UVR8 mediates accumulation of UV-absorbing pigments, but not changes in plant morphology, under outdoor conditions

Author

A, Coffey, E, Prinsen, M A K, Jansen, and J, Conway

Subjects
Photoreceptors, Plant, Arabidopsis Proteins, Chromosomal Proteins, Non-Histone, Ultraviolet Rays, Arabidopsis, Absorption, Radiation, Photosystem II Protein Complex, Plant Development, Pigments, Biological, Plant Leaves, Phenols, Mutation, Regression Analysis, Biomass, Seasons
Abstract

UVB radiation is biologically active; in plants, it can induce a range of molecular, biochemical, morphological and developmental responses. Although much progress has been made in elucidating UVB perception and signalling pathways under controlled laboratory conditions, understanding of the adaptive, ecological role of UVB responses is still very limited. In this study, we looked at the functional role of UVR8 under outdoor light conditions, by studying growth, photosynthetic competence and accumulation of UV absorbing pigments in a mutant lacking functional UVR8 protein. It was found that the influence of UVB on morphology is restricted to summer and is independent of UVR8. In contrast, UVB had an effect on the content of UV-absorbing pigments and the maximal efficiency of photosystem II of photosynthesis in the uvr8-1 mutant throughout the year. It is concluded that the UVR8 photoreceptor plays a role throughout the year, in the temperate climate zone, even when UVB levels are relatively low.

Published
2015

4. Abstracts of papers presented at the 12th Conference of the Weed Science Society of Israel

Author

J. Gressel, J. Friedman, S. Chyen, D. Stern, O. Barazani, Paulina Keller, Y. Kleifeld, Miriam Zilberstein, A. Dinoor, Nava Eshed, S. Golan, Ora Edut, A. Lisaii, H. Buxbaum, R. Gadish, M. Horowitz, L. Afgin, G. Herzlinger, A. Grinstein, H. Aviram, J. Secor, Rina Varsano, A. Tal, B. Rubin, Ariela Leist, J. Caseley, M. Negbi, R. Scalla, T. Yaacoby, J. C. Hall, G. R. Stephenson, Tamas Komives, J. Gressfx, M. Sibony, Y. Benyamini, S. R. Moss, J. C. Caseley, D. Chamovitz, Iris Pecker, G. Sandmann, J. Hirschberg, A. Perl, R. Perl-Treves, S. Galili, Dvora Aviv, E. Shalgi, S. Malkin, E. Galun, M. Schonfeld, M. A. K. Jansen, A. Trebst, M. Edelman, Hadar Kless, N. Ohad, Y. Evron, M. Yogev, D. M. Joel, D. Losner-Goshen, A. M. Mayer, G. Ben-Mod, A. Bargutti, R. Jacobsohn, E. Eldar, Adiva Shomer-Ilan, Y. Goldwasser, E. Levitin, O. Arav, Dana Kahana, null Rinatrusso, D. Palevitz, A. Levy, Orly Michael, D. Baum, A. Nir, A. Raz, Z. Ben-Arie, D. Carmon, R. Epstein, J. Baum, Y. Oren, S. Glidal, S. Graph, U. Luchinsky, A. Hadar, S. Kethain, S. Glidai, M. Gootman, Y. Noy, H. Apelblat, H. Bucsbaum, Y. Weiss, M. J. Pinthus, B. Retig, W. Lerer, N. Barnea, R. Gelman, A. Daube, U. Rosenberg, and S. Ovadia

Subjects
Agriculture, business.industry, Insect Science, Ecology (disciplines), Weed science, Plant Science, Biology, Social science, business
Published
1992
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5. Abstracts of Papers Presented at the 11th Conference of the Weed Science Society of Israel

Author

S. Gepstein, A. A. Schaffer, R. Reuveni, A. Zehavi, T. Blumenfeld, G. Herzlinger, A. Damn, S. Gross, A. Sharon, U. LEvanon, S. Graph, A. Ovadia, A. Grinstein, A. Danin, Batia Pazy, R. Epstein, M. A. K. Jansen, G. Herzlenger, Ziva Amsellem, M. Schonfeld, S. Brosh, Y. Boshvitz, Vered Kutner, Yigal Cohen, Y. Ohali, Y. Kleieeld, D. Kazzes, S. Funk, C. L. Elmore, U. Baruch, D. Mayshar, Y. Shaalhel, Y. Gotlieb, A. Bargutti, Y. Gati, A. Lisai, Elana Avidov, P. C. Quimby, Baruch Rubin, E. M. Smith, M. Horowitz, E. Nevo, T. Sachs, G. Krttzman, J. Toledano, John C. Steffens, A. Raz, Y. Weiss, Shifra Yadid, Naomi Ish-Shalom Gordon, J. Gressel, M. Negbi, U. Plitmann, R. Gadish, R. Jacobsohn, Y. Kleifeld, L. Margulies, S. F. Gorski, Noa Cohen, A. Back, M. Davis, D. Levi, Y. Benyamini, H. Bucsbaum, M. Cohen, T. Stern, N. Aharonson, J. Barkai, Elinoar Nttzani, Barbara Jean Mazur, Amos Rubin, Tamar Peled, Kela Marton, E. Eliyasi, M. Gokkes, Y. Shaaltiel, Daliah Losner, S. Golan, Y. Goldwasser, Jaacov Katan, Y. Kedar, B. Cohen, A. Bahat, M. Kovacs, A. Washawsky, and R. G. Kenneth

Subjects
Agriculture, business.industry, Insect Science, Ecology (disciplines), Weed science, Plant Science, Biology, Social science, business
Published
1990
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6. Abstracts of Papers Presented at the 10th Conference of the Weed Science Society of Israel

Author

B. Rubin, Miriam Freund, A. Tal, U. Rosenberg, U. Kafkafi, Y. Benyamini, Elana Avidov, N. Aharonson, J. Katan, S. Graph, Y. Kleifeld, G. Herzlinger, T. Blumenfeld, H. Bucsbaum, J. Gressel, J. Hirschberg, M. Schonfeld, T. Yaacoby, Orly Michael, M. A. K. Jansen, O. Canaani, J. J. S. Van Rensen, J. C. Wesselius, S. Malkin, Y. Shaaltiel, M. Jansen, A. Glazer, S. Geptstein, A. Washawsky, N. Cohen, N. H. Chua, R. Cohen, A. Grinstein, O. Yarden, N. Lisker, J. Riov, Y. Eshel, Rina Varsano, V. Gaba, Noa Cohen, A. Ben-Amotz, M. E. Kislev, A. Danin, D. Levi, Orna Reisman-Berman, J. Kigel, Dm. Joel, S. Golan, Faxen Omry, Einat Cohen, Rachel Dror, Dm Joel, D. M. Joel, Naomi Gordon-Ish Shalom, R. Jacobsohn, Y. Cohen, Vered Ruiner, A. Bargutti, Y. Friedman, D. Alon, Z. Arenstein, G. Tzamir, N. Bilitzer, S. Kedar, B. Margalit, Y. Barzily, M. Freiman, N. Biltizer, Y. Ohali, A. Nir, Y. Oren, A. Raz, A. Bahat, D. Ulmann, Y. Weiss, M. Abada, I. Levitin, Y. Sheinboim, J. Keren, and A. S. Funk

Subjects
Agriculture, business.industry, Insect Science, Ecology (disciplines), Weed science, Plant Science, Social science, Biology, business
Published
1988
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