The Role Of Carotenoids In Natural And Artificial Photosynthesis
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The Role Of Carotenoids In Natural And Artificial Photosynthesis
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Author : Rudi Berera
language : en
Publisher:
Release Date : 2007
The Role Of Carotenoids In Natural And Artificial Photosynthesis written by Rudi Berera and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Carotenoids Vol 4 Natural Functions
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Author : George Britton
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-11-14
Carotenoids Vol 4 Natural Functions written by George Britton and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-11-14 with Science categories.
The Carotenoids book series provides an introduction to the fundamental chemistry, detailed accounts of the basic methods used in carotenoid research, and critical discussions of the biochemistry, functions and applications of carotenoids. Part 1 discusses the fundamental properties on which the biological functions and effects of carotenoids depend. Part 2 describes important natural functions of carotenoids in all kinds of living organisms.
Electronic Structure Of Carotenoids In Natural And Artificial Photosynthesis
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Author : Manuel Flores-Hidalgo
language : en
Publisher:
Release Date : 2017
Electronic Structure Of Carotenoids In Natural And Artificial Photosynthesis written by Manuel Flores-Hidalgo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Science categories.
This chapter is about a theoretical study applied to six carotenoids present in vegetables containing carotenes and xanthophylls. Electronic properties are analyzed such as energy in frontier orbitals and the first molecular orbitals to work in the UV-Vis absorption spectroscopy. Electronic structure methodologies were used within the frame of the density functional theory (DFT) using the theoretical methods B3LYP/6-31G(d)//B3LYP/6-31G+(d,p) for ground states and B3LYP/6-31G(d)//CAM-B3LYP/6-31G+(d,p) for excited states. Results for the main absorption peak are in agreement with experimental results with a difference between zeaxanthin and violaxanthin results of 0.1 eV, approximately. The UV-Vis absorption spectra obtained for carotenoids are in good agreement with the experimental results. The possible use in energy generation systems is discussed for these systems. Diade chlorophyllide a-zeaxanthin was formed, and calculation results predicted energy transfer for these photosynthetic systems.
Carotenoids Biological Functions Of Carotenoids And Apocarotenoids In Natural And Artificial Systems
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Author :
language : en
Publisher: Academic Press
Release Date : 2022-08-23
Carotenoids Biological Functions Of Carotenoids And Apocarotenoids In Natural And Artificial Systems written by and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-08-23 with Science categories.
Carotenoids: Biological Functions of Carotenoids and Apocarotenoids in Natural and Artificial Systems, Volume 674 in the Methods in Enzymology series, highlights new advances in the field, with this new volume presenting interesting chapters on topics such as Ultrafast laser spectroscopic studies on carotenoids in solution and on those bound to photosynthetic pigment-protein complexes, Assessing photoprotective functions of carotenoids in photosynthetic systems of plants and green algae, Fluorescence of carotenoids: probing binding site interactions and conformational motion in carotenoproteins, Resonance Raman: A powerful tool to interrogate carotenoids in biological matrices, and much more. Other chapters in the book cover Engineering the carotenoid biosynthetic pathway to study the function of carotenoids in light-harvesting complexes, Carotenoids as proxies for variations in photosynthesis and phenology in response to environmental and climatic change, Apocarotenoid pigment biosynthesis in non-model plants, Apocarotenoid transport in plants, Screening for apocarotenoid plant growth regulators in Arabidopsis, Effects of herbivory on carotenoid biosynthesis and breakdown, Biosynthesis and action of apocarotenoid plant hormones, and much more. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in Methods in Enzymology series Updated release includes the latest information on Carotenoids: Biological functions of carotenoids and apocarotenoids in natural and artificial systems
Carotenoids In Nature
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Author : Claudia Stange
language : en
Publisher: Springer
Release Date : 2016-08-02
Carotenoids In Nature written by Claudia Stange and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-02 with Science categories.
This comprehensive, edited book explores carotenoids and their important functional roles in yeast, bacteria and plants and a profound exposition on the structures of carotenoid molecules, focusing in the first of three parts on the biosynthesis of carotenoids. The regulation of carotenoid biosynthesis in photosynthesis as well as in plant, fruits, storage roots and algae is central to the second part, and discoveries about the function of carotenoids in human health feature in the third and final part. Many helpful illustrations, explanations, overviews and examples help to bring readers up to date on relevant themes including carotenogenic genes, carotenoids in fruits and metabolic engineering. The book explores where carotenoids are synthesized in nature, including in carrots and algae. Contributing expert authors examine enzyme functions and plant models, and analyze the structure of carotenoid molecules. The function of carotenoids in photosynthesis and in photosynthetic organs as well as during fruit ripening are then explored. A whole chapter is dedicated to the latest research on apocarotenoids and further chapters cover interesting and novel themes on plastid development and the epigenetic regulation that affects carotenoid synthesis in plants. The metabolic engineering of carotenoids that has been done in fruits, plants, and seeds is another area that readers can explore, along with evidences on the function of carotenoids in human nutrition, as antioxidants, as in the control of lipid metabolism and in the absorption of carotenoids. This is a highly informative and wide-ranging work which will update researchers in the field, as well as supporting students of plant physiology and biotechnology, as supplementary reading.
Carotenoids In Photosynthesis
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Author : A. Young
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Carotenoids In Photosynthesis written by A. Young and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Significant developments in recent years have led to a deeper understanding of the role and function of carotenoids in photosynthesis. For the first time the biological, biochemical, and chemical aspects of the role of these pigments in photosynthesis are brought together in one comprehensive reference volume. Chapters focus on the photochemistry of carotenoids in light harvesting and photoprotection, the nature and distribution of carotenoids in photosynthetic organisms, their biosynthesis, the herbicidal inhibition of carotenogenesis and the `xanthophyll cycle'. Throughout details are given of the various methodologies used. A detailed appendix provides physical data for the major compounds. Carotenoids in Photosynthesis is an invaluable reference source for all plant scientists.
Design And Synthesis Of Artificial Photosynthetic Molecules To Mimic Aspects Of Natural Photosynthetic Mechanisms
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Author : Smitha Pillai
language : en
Publisher:
Release Date : 2011
Design And Synthesis Of Artificial Photosynthetic Molecules To Mimic Aspects Of Natural Photosynthetic Mechanisms written by Smitha Pillai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Photosynthesis categories.
Natural photosynthesis features a complex biophysical/chemical process that requires sunlight to produce energy rich products. It is one of the most important processes responsible for the appearance and sustainability of life on earth. The first part of the thesis focuses on understanding the mechanisms involved in regulation of light harvesting, which is necessary to balance the absorption and utilization of light energy and in that way reduce the effect caused by photooxidative damage. In photosynthesis, carotenoids are responsible not only for collection of light, but also play a major role in protecting the photosynthetic system. To investigate the role of carotenoids in the quenching of the excited state of cyclic tetrapyrroles, two sets of dyads were studied. Both sets of dyads contain zinc phthalocyanine (Pc) covalently attached to carotenoids of varying conjugation lengths. In the first set of dyads, carotenoids were attached to the phthalocyanine via amide linkage. This set of dyads serves as a good model for understanding the molecular "gear-shift" mechanism, where the addition of one double bond can turn the carotenoid from a nonquencher to a very strong quencher of the excited state of a tetrapyrrole. In the second set of dyads, carotenoids were attached to phthalocyanine via a phenyl amino group. Two independent studies were performed on these dyads: femtosecond transient absorption and steady state fluorescence induced by two-photon excitation. In the transient absorption study it was observed that there is an instantaneous population of the carotenoid S1 state after Pc excitation, while two-photon excitation of the optically forbidden carotenoid S1 state shows 1Pc population. Both observations provide a strong indication of the existence of a shared excitonic state between carotenoid and Pc. Similar results were observed in LHC II complexes in plants, supporting the role of such interactions in photosynthetic down regulation. In the second chapter we describe the synthesis of porphyrin dyes functionalized with carboxylate and phosphonate anchoring groups to be used in the construction of photoelectrochemical cells containing a porphyrin-Ir O2·HO complex immobilized on a TiO2 electrode. The research presented here is a step in the development of high potential porphyrin-metal oxide complexes to be used in the photooxidation of water. The last chapter focuses on developing synthetic strategies for the construction of an artificial antenna system consisting of porphyrin-silver nanoparticle conjugates, linked by DNA of varied length to study the distance dependence of the interaction between nanoparticles and the porphyrin chromophore. Preliminary studies indicate that at the distance of about 7-10 nm between porphyrin and silver nanoparticle is where the porphyrin absorption leading to fluorescence shows maximum enhancement. These new hybrid constructs will be helpful for designing efficient light harvesting systems.
Artificial Photosynthesis
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Author : Mohammad Najafpour
language : en
Publisher: BoD – Books on Demand
Release Date : 2012-02-24
Artificial Photosynthesis written by Mohammad Najafpour and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-02-24 with Science categories.
Photosynthesis is one of the most important reactions on Earth, and it is a scientific field that is intrinsically interdisciplinary, with many research groups examining it. We could learn many strategies from photosynthesis and can apply these strategies in artificial photosynthesis. Artificial photosynthesis is a research field that attempts to replicate the natural process of photosynthesis. The goal of artificial photosynthesis is to use the energy of the sun to make different useful material or high-energy chemicals for energy production. This book is aimed at providing fundamental and applied aspects of artificial photosynthesis. In each section, important topics in the subject are discussed and reviewed by experts.
Artificial Photosynthesis Using Chlorophyll Based Carotenoid Quinone Triads
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Author :
language : en
Publisher:
Release Date : 1986
Artificial Photosynthesis Using Chlorophyll Based Carotenoid Quinone Triads written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
The design, synthesis and study of a series of carotenoid-chlorophyll-quinone triad molecules which mimic some of the basic photochemistry and photophysics of natural photosynthesis is sought. The first members of this series have now been prepared, and have been found to mimic photosynthetic charge separation, carotenoid antenna function, and carotenoid photoprotection from singlet oxygen damage. Although the triad molecules mimic the general principle of multistep electron transfer which is found in natural photosynthesis, the details of photosynthetic electron transfer differ in the triads, in that the first electron transfer step involves electron donation from the excited state donor, followed by reduction of the resulting donor radical cation by the carotenoid. In photosynthesis, the electron is moved through several acceptors before the chlorophyll radical cation is reduced. Therefore, our recent work has concentrated on the design and synthesis of new model systems which better mimic certain aspects of natural photosynthesis.
The Photochemistry Of Carotenoids
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Author : H.A. Frank
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-04-11
The Photochemistry Of Carotenoids written by H.A. Frank and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-11 with Science categories.
Written by leading experts in the area of carotenoid research, this book gives a comprehensive overview of a various topics in the field. The contributions review the basic hypotheses about how carotenoids function and give details regarding testing different molecular models using state-of-the-art experimental methodologies.