Results 121 to 130 of about 21,000 (274)

Non-photochemical quenching of chlorophyll a fluorescence by oxidised plastoquinone: new evidences based on modulation of the redox state of the endogenous plastoquinone pool in broken spinach chloroplasts

, 2004
Twenty-five years ago, non-photochemical quenching of chlorophyll fluorescence by oxidised plastoquinone (PQ) was proposed to be responsible for the lowering of the maximum fluorescence yield reported to occur when leaves or chloroplasts were treated in ...
Pierre Haldimann, Merope Tsimilli-Michael, Haldimann, Pierre, Tsimilli-Michael, Merope   +3 more
core   +1 more source

Novel Non‐Cytotoxic Acylphosphinates and Acylphosphine Oxides Photoinitiators

Angewandte Chemie, EarlyView.
Novel acylphosphine oxide (APO) and acylphosphinate photoinitiators based on DPO and DOPO were designed to investigate structure–property relationships including photochemical performance, polymerization efficiency and cytotoxicity. While DPO derivatives showed excellent reactivity, DOPO‐based systems also displayed good efficiency and significantly ...
Jiansong Yin, Yijun Zhang, Bernadette Graff, Céline Dietlin, Michael Schmitt, Fabrice Morlet‐Savary, Tatiana Petithory, Laurent Pieuchot, Jing Zhang, Xiaotong Peng, Yangyang Xu, Jean‐Michel Becht, Pu Xiao, Jacques Lalevée   +13 more
wiley   +2 more sources

Effects of lanthanum on the antioxidant capacity of chloroplasts and chlorophyll fluorescence parameters of maize seedlings under chromium stress

Photosynthetica, 2019
Effects of lanthanum chloride (LaCl3) on chromium tolerance of maize were investigated at chloroplast level. The results showed that Cr stress significantly increased activities of ascorbate peroxidase, glutathione reductase, monodehydro-ascorbate ...
H. DAI, C. SHAN
doaj   +1 more source

Redirecting Excited‐State Proton Transfer Through Supramolecular Polymerization in Nanoconfinement

Angewandte Chemie, EarlyView.
Supramolecular confinement redirects the excited‐state proton transfer pathway of an amphoteric emitter. In water, the molecule undergoes ESPD, whereas co‐assembly with γ‐cyclodextrin forms nanotubes that template slip‐stacked emitter pairs and enable ESIMPT. Structural and photophysical characterization of the assemblies shows that the preorganization
Luis C. Pantaleone, Robert Hutchings, Bente Reus, Jacopo Martinelli, Alessia Lasorsa, Patrick C. A. van der Wel, Marc C. A. Stuart, Wesley R. Browne, Tibor Kudernac   +8 more
wiley   +2 more sources

Use of Open Source Hardware and Software Platforms to Quantify Spectrally Dependent Differences in Photochemical Efficiency and Functional Absorption Cross Section within the Dinoflagellate Symbiodinium spp.

Frontiers in Marine Science, 2017
Active chlorophyll a fluorescence is an essential tool for understanding photosynthetic activity within cnidarian/dinoflagellate symbioses. Fluorescence measurement is typically achieved by utilizing a blue or red monochromatic excitation light source ...
Kenneth D. Hoadley, Mark E. Warner
doaj   +1 more source

Photochemical and Non-Photochemical Quenching Coefficients of the Chlorophyll Fluorescence: Comparison of Variation and Limits

Photosynthetica, 1999
There are several types of quenching coefficients currently in use which describe the decrease of the chlorophyll fluorescence: the photochemical quenching coefficients qP and q(P)rel and the non-photochemical quenching coefficients qN, q(N)rel, and NPQ. These five coefficients were calculated for a broad variety of cases of the fluorescence signals in
openaire   +1 more source

Study of factors controlling the photoprotection capacity of the thylakoid membrane

, 2010
PhDPlants require light for the process of photosynthesis, but excess of light absorption can cause photooxidative damage. To avoid this damage, plants have evolved a photoprotective mechanism to dissipate excess light energy as heat in a process ...
Zia, Ahmad
core  

Remote oxygen sensing by ionospheric excitation (ROSIE) [PDF]

, 2009
The principal optical observable emission resulting from ionospheric modification (IM) experiments is the atomic oxygen red line at 630 nm, originating from the O(1D–3P) transition. Because the O(1D) atom has a long radiative lifetime, it is sensitive
Pedersen, T. R., Kosch, M.J., E. A. Kendall, Kendall, E. A., Slanger, T.G., Gustavsson, Björn Johan, Kendall, E.A., T. G. Slanger, Rietveld, Michael T, Gustavsson, B., K. S. Kalogerakis, Kalogerakis, K. S., Slanger, T. G., B. Gustavsson, M. T. Rietveld, M. J. Kosch, Kosch, M. J., Kalogerakis, K.S., T. R. Pedersen, Pedersen, T.R., Rietveld, M.T.   +20 more
core   +1 more source

Short-Term Evaluation of Woodland Strawberry in Response to Melatonin Treatment under Low Light Environment

Horticulturae
The cultivation of strawberries in controlled environments presents challenges related to environmental stressors, especially insufficient light. Melatonin, as a widely investigated plant growth regulator, was considered as a potential candidate to ...
Yunlong Shi, Xiaobin Fan, Yahan Sun, Zhiru Yu, Yan Huang, Danlei Li, Zhizhong Song, Kai Zhang, Hongxia Zhang   +8 more
doaj   +1 more source

Non-Photochemical Quenching Capacity in Arabidopsis thaliana Affects Herbivore Behaviour

PLoS ONE, 2013
Under natural conditions, plants have to cope with numerous stresses, including light-stress and herbivory. This raises intriguing questions regarding possible trade-offs between stress defences and growth. As part of a program designed to address these questions we have compared herbivory defences and damage in wild type Arabidopsis thaliana and two ...
Johansson Jänkänpää, Hanna, Frenkel, Martin, Zulfugarov, Ismayil, Reichelt, Michael, Krieger-Liszkay, Anja, Mishra, Yogesh, Gershenzon, Jonathan, Moen, Jon, Lee, Choon-Hwan, Jansson, Stefan   +9 more
openaire   +6 more sources