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Frequently asked questions about chlorophyll fluorescence, the sequel.

ABSTRACT: Using chlorophyll (Chl) a fluorescence many aspects of the photosynthetic apparatus can be studied, both in vitro and, noninvasively, in vivo. Complementary techniques can help to interpret changes in the Chl a fluorescence kinetics. Kalaji et al. (Photosynth Res 122:121-158, 2014a) addressed several questions about instruments, methods and applications based on Chl a fluorescence. Here, additional Chl a fluorescence-related topics are discussed again in a question and answer format. Examples are the effect of connectivity on photochemical quenching, the correction of F V /F M values for PSI fluorescence, the energy partitioning concept, the interpretation of the complementary area, probing the donor side of PSII, the assignment of bands of 77 K fluorescence emission spectra to fluorescence emitters, the relationship between prompt and delayed fluorescence, potential problems when sampling tree canopies, the use of fluorescence parameters in QTL studies, the use of Chl a fluorescence in biosensor applications and the application of neural network approaches for the analysis of fluorescence measurements. The answers draw on knowledge from different Chl a fluorescence analysis domains, yielding in several cases new insights.

SUBMITTER: Kalaji HM

PROVIDER: S-EPMC5357263 | biostudies-other | 2017 Apr

REPOSITORIES: biostudies-other

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Frequently asked questions about chlorophyll fluorescence, the sequel.

Kalaji Hazem M HM Schansker Gert G Brestic Marian M Brestic Marian M Bussotti Filippo F Calatayud Angeles A Ferroni Lorenzo L Goltsev Vasilij V Guidi Lucia L Jajoo Anjana A Li Pengmin P Losciale Pasquale P Mishra Vinod K VK Misra Amarendra N AN Nebauer Sergio G SG Pancaldi Simonetta S Penella Consuelo C Pollastrini Martina M Suresh Kancherla K Tambussi Eduardo E Yanniccari Marcos M Zivcak Marek M Cetner Magdalena D MD Samborska Izabela A IA Stirbet Alexandrina A Olsovska Katarina K Kunderlikova Kristyna K Shelonzek Henry H Rusinowski Szymon S Bąba Wojciech W

Photosynthesis research 20161104 1

Using chlorophyll (Chl) a fluorescence many aspects of the photosynthetic apparatus can be studied, both in vitro and, noninvasively, in vivo. Complementary techniques can help to interpret changes in the Chl a fluorescence kinetics. Kalaji et al. (Photosynth Res 122:121-158, 2014a) addressed several questions about instruments, methods and applications based on Chl a fluorescence. Here, additional Chl a fluorescence-related topics are discussed again in a question and answer format. Examples ar ...[more]

PMID: 27815801

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Project description:BackgroundRheumatologists must contend with COVID-19 pandemic in the management of their patients and many questions have been raised on the use of both anti-inflammatory drugs and disease-modifying anti-rheumatic drugs (DMARD). The French Society of Rheumatology (SFR) selected the most critical ones to the daily practice of a rheumatologist and a group of 10 experts from SFR and Club Rheumatism and Inflammation (CRI) boards proposed responses based on the current knowledge of May 2020.MethodsFollowing the availability of the first 18 questions and statements, 1400 individuals consulted the frequently asked questions between the March 31, 2020 and April 12, 2020. As a result, 16 additional questions were forwarded to the SFR, and answered by the board. An additional round of review by email and video conference was organized, which included updates of the previous statements. The scientific relevance of 5 of the questions led to their inclusion in this document. Each response received a final assessment on a scale of 0-10 with 0 meaning no agreement whatsoever and 10 being in complete agreement. The mean values of these votes for each question are presented as the levels of agreement (LoA) at the end of each response. This document was last updated on April 17, 2020.ResultsBased on current scientific literature already published, in most circumstances, there is no contraindication to the initiation or continuation of anti-inflammatory drugs as well as DMARDs. If signs suggestive of infection (coronavirus or other) occur, treatments should be discontinued and resumed, if necessary, after 2 weeks without any symptoms. Only, some signals suggest that people taking an immunosuppressive dose of corticosteroid therapy are at greater risk of developing severe COVID-19. Intra-articular injections of glucocorticoids are allowed when there is no reasonable therapeutic alternative, and providing that precautions to protect the patient and the practitioner from viral contamination are adopted, included appropriate information to the patient.ConclusionsCurrently available data on managing patients with rheumatic diseases during the COVID-19 pandemic are reassuring and support continuing or initiating symptomatic as well as specific treatments of these diseases, the main target of their management remaining their appropriate control, even during this pandemic.

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Frequently asked questions about chlorophyll fluorescence, the sequel.

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Frequently asked questions about chlorophyll fluorescence, the sequel.

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