Gotowe bibliografie tematyczne / Chlorophyll

Gotowa bibliografia na temat „Chlorophyll”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 28 lipca 2024

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Artykuły w czasopismach na temat "Chlorophyll"

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Vaňková, Kateřina, Ivana Marková, Jana Jašprová, Aleš Dvořák, Iva Subhanová, Jaroslav Zelenka, Iva Novosádová i in. "Chlorophyll-Mediated Changes in the Redox Status of Pancreatic Cancer Cells Are Associated with Its Anticancer Effects". Oxidative Medicine and Cellular Longevity 2018 (2.07.2018): 1–11. http://dx.doi.org/10.1155/2018/4069167.

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Nutritional factors which exhibit antioxidant properties, such as those contained in green plants, may be protective against cancer. Chlorophyll and other tetrapyrrolic compounds which are structurally related to heme and bilirubin (a bile pigment with antioxidant activity) are among those molecules which are purportedly responsible for these effects. Therefore, the aim of our study was to assess both the antiproliferative and antioxidative effects of chlorophylls (chlorophylla/b, chlorophyllin, and pheophytina) in experimental pancreatic cancer. Chlorophylls have been shown to produce antiproliferative effects in pancreatic cancer cell lines (PaTu-8902, MiaPaCa-2, and BxPC-3) in a dose-dependent manner (10–125 μmol/L). Chlorophylls also have been observed to inhibit heme oxygenase (HMOX) mRNA expression and HMOX enzymatic activity, substantially affecting the redox environment of pancreatic cancer cells, including the production of mitochondrial/whole-cell reactive oxygen species, and alter the ratio of reduced-to-oxidized glutathione. Importantly, chlorophyll-mediated suppression of pancreatic cancer cell viability has been replicated inin vivoexperiments, where the administration of chlorophyllaresulted in the significant reduction of pancreatic tumor size in xenotransplanted nude mice. In conclusion, this data suggests that chlorophyll-mediated changes on the redox status of pancreatic cancer cells might be responsible for their antiproliferative and anticancer effects and thus contribute to the decreased incidence of cancer among individuals who consume green vegetables.
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Putra, Bayu Taruna Widjaja, Risky Setiawan Purwoko, Indarto Indarto i Peeyush Soni. "An investigation of copper chlorophyllin solution for low-cost optical devices calibration in chlorophyll measurement". International Journal of Metrology and Quality Engineering 10 (2019): 10. http://dx.doi.org/10.1051/ijmqe/2019009.

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Chlorophylls and turbidity are related parameters deemed important in predicting water quality, especially in the freshwater fisheries sector. In other hand, chlorophyll contents in vegetation are often used as a measure for estimating plant health. To ensure the chlorophyll content, appropriate analysis techniques are needed, which include, yet not limited to, dimethylsulfoxide (DMSO), acetone extraction analysis, and measuring turbidity using expensive equipment. Measurements using these methods are still not reliable, especially for smallholders. In addition, calibration of a digital camera for these purposes requires several efforts of preparing a series of chemical analyses and the qualities of newly developed cameras have increased. Thus, calibration needs to be taken into account for improving the accuracy in estimating chlorophyll contents. This study posits fundamental findings germane to the potential use of chlorophyllin for calibrating the optimal instrument, like consumer-grade cameras. Sodium copper chlorophyllin is commonly used as food additive and ingredients, and medical treatments. However, we can gain another benefit of chlorophyllin, particularly for developing low-cost optical instruments for estimating chlorophyll content through hydro-color-based with promising accuracy.
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Li, Yaqiong, i Min Chen. "Novel chlorophylls and new directions in photosynthesis research". Functional Plant Biology 42, nr 6 (2015): 493. http://dx.doi.org/10.1071/fp14350.

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Chlorophyll d and chlorophyll f are red-shifted chlorophylls, because their Qy absorption bands are significantly red-shifted compared with chlorophyll a. The red-shifted chlorophylls broaden the light absorption region further into far red light. The presence of red-shifted chlorophylls in photosynthetic systems has opened up new possibilities of research on photosystem energetics and challenged the unique status of chlorophyll a in oxygenic photosynthesis. In this review, we report on the chemistry and function of red-shifted chlorophylls in photosynthesis and summarise the unique adaptations that have allowed the proliferation of chlorophyll d- and chlorophyll f-containing organisms in diverse ecological niches around the world.
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Li, Yaqiong, Nicholas Scales, Robert E. Blankenship, Robert D. Willows i Min Chen. "Extinction coefficient for red-shifted chlorophylls: Chlorophyll d and chlorophyll f". Biochimica et Biophysica Acta (BBA) - Bioenergetics 1817, nr 8 (sierpień 2012): 1292–98. http://dx.doi.org/10.1016/j.bbabio.2012.02.026.

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Wood, Lindsay W. "Chloroform–Methanol Extraction of Chlorophyll a". Canadian Journal of Fisheries and Aquatic Sciences 42, nr 1 (1.01.1985): 38–43. http://dx.doi.org/10.1139/f85-005.

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Chloroform–methanol (2:1, v/v) extracts significantly more (P < 0.001) chlorophyll a from algal cultures and from freshwater and seawater microcosms than does dimethyl sulfoxide, methanol, absolute methanol with hydrogen sulfide, or 90% acetone. For chlorophyte cultures it yields 97% or more of the chlorophyll a within a 4-h steeping period without grinding. It can be used with both calibrated spectrophotometry and fluorometric instrumentation. Sample filtration onto MgCO3-coated filters is recommended to ensure buffering of the extraction mixture. Holding the filters in chloroform–methanol at 4 °C or room temperature in the dark prevents loss of chlorophyll a for at least 10 d. More refined analyses of phaeophytin and other chlorophylls require the use of chloroform–methanol–water (2:2:1.8, by volume) and placement in a separatory funnel. After 24 h the lower (chloroform) layer contains all of the chlorophyll. Strict pH control is required for pheophytin determinations.
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Loughlin, Patrick C., Robert D. Willows i Min Chen. "Hydroxylation of the C132 and C18 carbons of chlorophylls by heme and molecular oxygen". Journal of Porphyrins and Phthalocyanines 19, nr 09 (wrzesień 2015): 1007–13. http://dx.doi.org/10.1142/s1088424615500571.

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Following extraction from photosynthetic organisms, chlorophylls are prone to reactions including demetalation, dephytylation and specific oxidations of the exocyclic ring E, termed allomerizations. Allomerization of chlorophylls has been well-characterized in methanol and to a lesser extent in aqueous solution. Here we detail novel allomerization-like reactions of chlorophyll a and chlorophyll b. In the presence of heme, detergent-solubilized chlorophyll a is hydroxylated at its C 132 position in ring E and, surprisingly, the C 18 position in ring D. Two major oxidation products are synthesized — a C 132- OH and a C 132- OH , C 18- OH derivative of chlorophyll a. We track the origin of the oxygen atoms added in these hydroxylated chlorophylls using 18 O 2 labeling and demonstrate that the additional oxygen atoms are derived from molecular oxygen. A similar heme-catalyzed reaction is also observed using chlorophyll b as a substrate. These results highlight the need for care when dealing with extracted chlorophylls and demonstrate an unusual hydroxylation of the C 18 position of chlorophylls in the presence of heme.
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Costa, Junet F. da, Ferry F. Karwur i Leenawaty Limantara. "Efek Beta Karoten dan Agregasi Klorofil Pada Fotostabilitas Klorofil a dalam Pelarut Aseton". Jurnal Natur Indonesia 11, nr 2 (20.11.2012): 115. http://dx.doi.org/10.31258/jnat.11.2.115-123.

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Chlorophyll as photosynthetic pigment has many benefits to human such as antioxidant, antibacterial, color additive,immunity, and photosensitizer. Concerning to these applications, chlorophyll a will react with oxygen and light andreduce its effectiveness. It is then important to understand the stability of chlorophyll a on oxygen and light.Stability of chlorophyll a in the presence of beta-carotene (1:1) in acetone was studied for various waterconcentrations. Each solution was exposed to red light (ë e” 630 nm) for 0.5; 1.0; 2.5; 5.0; 10; 20; 30; 40; 50; and 60minutes and their spectrum were analysed. When water was added (8.33; 16.67; 25; 33.33; 41.67; 50; 58.33; 66.67;75; and 83.33 percent) to the acetone solution of chlorophyll a, the chlorophylls aggregate, and in the presence ofbeta-carotene, the chlorophyll more stable. The water shifts the chlorophyll a spectrum toward red duringillumination with or without the presence of carotene. The formation of oligomeric chlorophyll a aggregate occurswithin 10-20 minutes after the water was applied. This strategy of aggregating the chlorophylls to dissipateexcess energy captured from light does not support the photostability of chlorophyll as much as beta-carotene.Surprisingly, when beta carotene was mixed with 66.7% and 75.0% of water, the chlorophyll a degraded 5.56% and9.71% respectively. In conclusion, the aggregate form of chlorophyll a and the presence of beta-carotene increasephotostability of chlorophyll a in acetone solution.
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Chaicharoenaudomrung, Nipha, Anant Oonsivilai i Ratchadaporn Oonsivilai. "Chlorophylls Contents in Echinocactus grusonii Extract". Advanced Materials Research 931-932 (maj 2014): 1507–11. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.1507.

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Currently, Golden Barrel cactus extract is formulated in dietary supplements, on account of its powerful weight loss profit and antioxidant activity. Golden Barrel cactus grusonii (Echinocactus grusonii), a Thai cultivar Golden Barrel cactus which is known as the golden barrel Golden Barrel cactus was therefore investigated for total chlorophylls with the aim of developing as a dietary supplement in future. The chlorophyll contents of 3 and 6 years Echinocactus grusonii extracts were evaluated by High Performance Liquid Chromatography with a Grace-Vydac 201TP54 reversed-phase polymeric C18 column. The results showed that chlorophyll a and chlorophyll b are the main components of Echinocactus grusonii crude extracts also at higher level at age 3 years. It was found that the main chlorophylls contents are chlorophyll a and chlorophyll b at 2.94±0.55μg/ml and 1.63±0.14 μg/ml for 3 years Echinocactus grusonii. In addition, the amount of chlorophyll a and chlorophyll b show lower content at 1.11±0.25μg/ml and 0.67±0.01μg/ml for 6 years Echinocactus grusonii. In conclusion, Echinocactus grusonii age 3 years crude extracts showed total chlorophylls contents higher than at age 6 years. The phytochemical profile study of Echinocactus grusonii age 3 years and 6 years crude extracts are planned in the near future.
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Mińkowski, Karol, Monika Bartosiak i Dariusz Ciemiński. "Effect of extraction and refining of rapeseed oil on profile and content of chlorophyll pigments". Zywnosc Nauka Technologia Jakosc/Food Science Technology Quality 119, nr 2 (2019): 95–109. http://dx.doi.org/10.15193/zntj/2019/119/288.

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The objective of the research study was to determine the effect of industrial extraction and refining of rapeseed oil on the profile and content of chlorophyll pigments, where those processes were carried out under industrial conditions with the use of a modernized production line. The material to be analysed were samples of oil collected at various stages of the rapeseed oil extraction and refining processes. The content of chlorophyll pigments was determined using a reversed phase high-performance liquid chromatography with fluorometric detection. It was found that the industrial method of extracting rapeseed oil affected the profile and content of chlorophyll pigments. The content of chlorophyll pigments in the extracted oil was 40 % higher than that in the pressed oil. The chlorophyll pigments analysed mainly contained pheophytin and phyropheophytin, and only small amounts of chlorophylls a and b. The thermal treatment of oil performed prior to the refining caused the chlorophylls to fully transform. The phyropheophytin to pheophytin ratio changed from 0.7 to 3.8 : 1. The crude oil contained chlorophylls derivatives only. The acid-degumming and neutralisation processes of oil caused the total content of chlorophyll pigments to slightly decrease and their profile to change a little. The effectiveness of reducing chlorophyll pigments after bleaching was 98.5 %. Compared to the chlorophyll b derivatives, the chlorophyll a derivatives were more easily removed from the oil with the use of bleaching clay. In some batches of the bleached oil the phyropheophytin b was still present and its amount was of 0.09 mg/kg.
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Miyachi, Shigetoh, Kerstin Strassdat, Hideaki Miyashita i Horst Senger. "Quantum Requirement of Photosynthesis in the Primarily Chlorophyll d Containing Prokaryote Acaryochloris marina". Zeitschrift für Naturforschung C 52, nr 9-10 (1.10.1997): 636–38. http://dx.doi.org/10.1515/znc-1997-9-1010.

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The recently isolated and characterized unicellular photosynthetic prokaryote Acaryochloris marina (Miyashita et al., 1996) contains chlorophylls a, d , and traces of a chlorophyll c-like pigment as well as phycocyanin. a type of allophycocyanin, zeaxanthin and cx-carotene, chlorophyll d being the predominant chlorophyll component. Quantum requirement measurements of the photosynthetic oxygen evolution resulted in about 12 quanta for excitation of chlorophylls a and d and 18 for phycocyanin. The data also revealed that these pigments are involved in energy absorption for photosynthetic oxygen evolution. Energy is transferred efficiently and equally well between the chlorophylls. Light absorbed by phycocyanin which is organized in phycobiliprotein aggregates (M arquardt et al., 1997), results in a less efficient energy transfer to the reaction center chlorophylls
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Rozprawy doktorskie na temat "Chlorophyll"

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Lüthy, Barbara. "Linolensäure-abhängige Chlorophyll-Bleichung /". [S.l.] : [s.n.], 1985. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=7872.

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Walker, John Stuart. "Autoxidation reactions of chlorophyll". Thesis, University of York, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403864.

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Bosch, Jennifer. "Satellite-Measured Chlorophyll Variability Within the Upwelling Zone Near Heceta Bank, Oregon". Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/BoschJ2002.pdf.

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Hörtensteiner, Stefan. "Chlorophyll breakdown in higher plants /". Zürich : [s.n.], 1999. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000254617.

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Woolley, Paul Simon. "Spectroscopic studies of chlorophyll transformations". Thesis, University of York, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387546.

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Dash, Jadunandan. "The MERIS terrestrial chlorophyll index". Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420238.

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Haas, Eva Katharina. "Clomazone action and chlorophyll biosynthesis". Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389121.

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Chidgey, Jack. "Investigations into synechocystis chlorophyll synthase". Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/7893/.

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The first stage of photosynthesis involves the capture of light by pigment molecules bound within membrane-associated protein complexes. Arguably the most important of these pigments are the chlorophylls, tetrapyrrole molecules with a centrally-coordinated Mg2+ ion, a fifth ring and a long hydrophobic tail. Chlorophyll biosynthesis occurs in a stepwise manner, starting with chelation of the Mg2+ and ending with the addition of the tail via a reaction catalysed by chlorophyll synthase (CS). Then, there is handover of newly-synthesised chlorophylls to the apparatus for assembling photosynthetic complexes, in a poorly-understood process that likely involves CS. This handover process was investigated by FLAG-tagging the Synechocystis CS. Following immunoprecipitation an enzymatically active protein-pigment complex was retrieved containing the high-light-inducible protein HliD, the membrane insertase YidC and the putative photosystem II assembly factor Ycf39. This is the first evidence for a link between Chl biosynthesis and YidC-dependent co-translational insertion of nascent light-harvesting polypeptides into membranes. Analysis of similar pull-down experiments carried out on cells before and after light shock revealed that CS continues to interact with the HliD and YidC proteins during light shock whilst the interaction of CS with Ycf39 is abolished. Further analysis indicated that the light shock treatment causes a rearrangement of the remaining proteins implying different chlorophyll handover systems may be employed during assembly and repair of light harvesting and reaction centre complexes. Preliminary kinetic characterisation of FLAG-purified CS was carried out using a chlorophyllide substrate produced by a Rba. sphaeroides mutant. Km values of 25.7 μM ± 19.2 and 66.8 ± 33.1 μM for chlorophyllide and geranylgeranyl pyrophosphate, respectively, were obtained. An artificial gene was designed encoding a polypeptide representing the loop regions of CS; the expressed, purified polypeptide was used to raise a synthase antibody, which will be useful for future studies of this enzyme.
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Schmidt, Kristin. "Pigmentbindung verschiedener Mitglieder der erweiterten Chlorophyll-a-b-Proteinfamilie und des wasserlöslichen Chlorophyll-Proteins WSCP". [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968710921.

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Hodges, Benjamin A. "On the distribution of oceanic chlorophyll". Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3225896.

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Thesis (Ph. D.)--University of California, San Diego, 2006.
Title from first page of PDF file (viewed October 8, 2006). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 139-143).
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Książki na temat "Chlorophyll"

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Papageorgiou, George Christos, i Govindjee, red. Chlorophyll a Fluorescence. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-3218-9.

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1942-, Scheer Hugo, red. Chlorophylls. Boca Raton, Fla: CRC Press, 1991.

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Smith, Alison, i Michael Witty. Heme, Chlorophyll, and Bilins. New Jersey: Humana Press, 2001. http://dx.doi.org/10.1385/1592592430.

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G, Smith Alison, i Witty Michael, red. Heme, chlorophyll, and bilins: Methods and protocols. Totowa, N.J: Humana Press, 2002.

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Kalaji, Mohamed H., Vasilij N. Goltsev, Krystyna Zuk-Golaszewska, Marek Zivcak i Marian Brestic. Chlorophyll Fluorescence, Understanding Crop Performance. 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315153605.

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Rebeiz, Constantin A. Chlorophyll Biosynthesis and Technological Applications. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7134-5.

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Chŏn, Yŏng-ŏn. Kodŭng singmul yŏmnokchʻe ŭi kujo wa kinŭng. [Pʻyŏngyang]: Kwahak, Paekkwa Sajŏn Chʻulpʻansa, 1987.

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Le, Hua. Chlorophyll: Structure, production and medicinal uses. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Hussein, Ahmed A. Removal of chlorophyll from canola oil. Ottawa: National Library of Canada, 1994.

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1930-, Papadēmētrakopoulos Ēlias Ch, red. Toothpaste with chlorophyll ; Maritime hot baths. Santa Maria: Asylum Arts, 1992.

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Części książek na temat "Chlorophyll"

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Hendry, G. A. F. "Chlorophylls and chlorophyll derivatives". W Natural Food Colorants, 131–56. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4615-2155-6_5.

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Bährle-Rapp, Marina. "Chlorophyll". W Springer Lexikon Kosmetik und Körperpflege, 104. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_1909.

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Hoving, Aster. "Chlorophyll". W Solarities, 49–62. Earth, Milky Way: punctum books, 2023. http://dx.doi.org/10.53288/0404.1.04.

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This essay traces the seasonal and diurnal rhythms of chlorophyll, the pigment that makes the leaves of plants appear green, to develop an elemental analysis of solar energy infrastructures. I explore the temporal, material, and conceptual affordances of chlorophyll through poetic and visual artworks that evoke the changing availability of sunlight reaching the earth. Attending to chlorophyll, I argue, demonstrates how fantasies of unlimited solar energy depend on efforts to seize permanent access and exposure to the sun. While colossal infrastructure projects covering or even transcending the earth aim to turn the sun into an unlimited profitable resource, chlorophyll makes perceptible embod
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Kräutler, Bernhard. "Chlorophyll Breakdown". W Tetrapyrroles, 274–85. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-78518-9_17.

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Kräutler, Bernhard. "Chlorophyll Catabolites". W Fortschritte der Chemie organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products, 1–43. Vienna: Springer Vienna, 2008. http://dx.doi.org/10.1007/978-3-211-74019-4_1.

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Willows, Robert D. "Chlorophyll Synthesis". W Advances in Photosynthesis and Respiration, 295–313. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-4061-0_15.

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von Wettstein, Diter. "Chlorophyll Biosynthesis". W Plant Molecular Biology 2, 449–59. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3304-7_43.

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Strasser, Reto J., Merope Tsimilli-Michael i Alaka Srivastava. "Analysis of the Chlorophyll a Fluorescence Transient". W Chlorophyll a Fluorescence, 321–62. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-3218-9_12.

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Nedbal, Ladislav, i John Whitmarsh. "Chlorophyll Fluorescence Imaging of Leaves and Fruits". W Chlorophyll a Fluorescence, 389–407. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-3218-9_14.

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Adams, William W., i Barbara Demmig-Adams. "Chlorophyll Fluorescence as a Tool to Monitor Plant Response to the Environment". W Chlorophyll a Fluorescence, 583–604. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-3218-9_22.

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Streszczenia konferencji na temat "Chlorophyll"

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Popa, Viorica-Mirela, Delia-Gabriela Dumbrava, Diana-Nicoleta Raba, Florina Radu i Camelia Moldovan. "SPECTROPHOTOMETRIC DETERMINATION OF THE CONTENT OF CHLOROPHYLLS, CAROTENOIDS AND XANTHOPHYLL IN THE FRESH AND DRY LEAVES OF SOME SEASONING AND AROMATIC PLANTS FROM THE WESTERN AREA OF ROMANIA". W 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/6.2/s25.39.

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Aromatic plants have been one of the important concerns of man since the beginning of his existence. Seasoning plants, due to the presence in their composition of active principles with antibacterial and antifungal effect, allow a better preservation of food, a fact that over time has played an important role in preventing possible infections. Chlorophyll is the pigment that gives plants their green color and supports plants in absorbing energy and nutrients. Chlorophyll is found in most green plants and vegetables. Chlorophyll can also benefit the health of the human body as it is a natural source of antioxidants. Green chlorophyll pigments (chlorophyll a and b) and yellow pigments or carotenoide (carotenes and xanthophyll) represent photosynthetic or assimilatory pigments. The purpose of this paper consisted in studies on the comparative content of chlorophylls, carotenes and xanthophyll in the fresh and dry leaves of 12 seasoning and aromatic plants from the Western region of Romania, namely: celery, dill, parsley, lovage, rosemary, thyme, mint, basil, tarragon, sorrel, sage and stevia. Concentration of chlorophylls, carotenes and xanthophyll was determined by a spectrophotometric assay.
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Phothilimthana, Phitchaya Mangpo, Tikhon Jelvis, Rohin Shah, Nishant Totla, Sarah Chasins i Rastislav Bodik. "Chlorophyll". W PLDI '14: ACM SIGPLAN Conference on Programming Language Design and Implementation. New York, NY, USA: ACM, 2014. http://dx.doi.org/10.1145/2594291.2594339.

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Caus, Maria, Alexandru Dascaliuc, Pantelimon Borozan i Bettina Eichler-Lubermann. "Efectul utilizării elementelor nutritive pentru germinare și creștere asupra indicilor fotosintetici ai frunzelor de porumb Zea mays L." W VIIth International Scientific Conference “Genetics, Physiology and Plant Breeding”. Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2021. http://dx.doi.org/10.53040/gppb7.2021.08.

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In this study experiments were conducted on the influence of ½ Hoagland nutrient media (NM), utilized for germination, on the content of chlorophylls, carotenoids and activity of photosystem II (FSII) of two maize hybrids (Porumbeni 180 and Bemo 203). The results showed that contents of chlorophyll a, b, (a + b) and carotenoids were significantly higher in leaves of Bemo 203 that germinated on NM, compared to the control. But in leaves of the Porumbeni 180 hybrid significant differences in the content of chlorophyll pigments in both the control and exper-imental plants were not detected. The FSII level in the leaves of the Porumbeni 180 was higher than in leaves of the Bemo 203, both for the control and experimental plants.
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Marcolin, Giampaolo, i Elisabetta Collini. "Ultrafast carotenoid-chlorophyll interactions in fucoxanthin-chlorophyll protein (FCP)". W Quantum Effects and Measurement Techniques in Biology and Biophotonics, redaktorzy Clarice Aiello, Sergey V. Polyakov i Paige Derr. SPIE, 2024. http://dx.doi.org/10.1117/12.3001504.

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Hutomo E. P., Evan, Marcelinus Alfasisurya S. Adibawa, Kestrilia R. Prilianti, Heriyanto Heriyanto i Tatas H. P. Brotosudarmo. "Low-cost chlorophyll meter (LCCM): portable measuring device for leaf chlorophyll". W Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016), redaktorzy Agus M. Hatta i Aulia M. T. Nasution. SPIE, 2016. http://dx.doi.org/10.1117/12.2243607.

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Bannari, A., K. Khurshid, K. Staenz i J. Schwarz. "Wheat Crop Chlorophyll Content Estimation From Ground-Based Reflectance Using Chlorophyll Indices". W 2006 IEEE International Symposium on Geoscience and Remote Sensing. IEEE, 2006. http://dx.doi.org/10.1109/igarss.2006.34.

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Zheng, Xiaoshen, Wei Li, Wenling Liu i Jing Wang. "Methods of Chlorophyll Concentration Retrieval". W 2008 Fifth International Conference on Fuzzy Systems and Knowledge Discovery (FSKD). IEEE, 2008. http://dx.doi.org/10.1109/fskd.2008.6.

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Kassi, Hassane, Surat Hotchandani, Roger M. Leblanc, N. Beaudoin i M. Dery. "Pulsed photoconductivity of chlorophyll a". W Optics, Electro-Optics, and Laser Applications in Science and Engineering, redaktorzy Marcus F. Lawrence, Arthur J. Frank, S. Ramasesha i Carl C. Wamser. SPIE, 1991. http://dx.doi.org/10.1117/12.45114.

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Castagnoli, F., G. Cecchi, L. Pantani, B. Radicati, M. Romoli i P. Mazzinghi. "Investigation of the Photosynthetic Process by Lidar Fluorosensors". W Laser and Optical Remote Sensing: Instrumentation and Techniques. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/lors.1987.mc17.

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Chlorophyll plays a fundamental role in the photosynthetic process of living plants, it is therefore obvious that each phenomenon related to chlorophyll may also be related to the photosynthetic process. Since chlorophyll a shows a strong fluorescence emission in the wavelength region between 67 0 nm and 740 nm it is attractive to analyze the potential of laser fluorosensors in the remote sensing of living plants. While a quite large number of papers were devoted to the lidar remote sensing of chlorophyll fluorescence in phytoplancton only few papers has been devoted to the remote sensing of chlorophyll fluorescence in living plants. A research program in this field was started as a part of a national program on agriculture improvement (IPRA Project), the analysis was carried out in the laboratory by means of a lidar simulator and in fields by means of the lidar fluorosensor FLIDAR-2.
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Konrade, Daiga, i Kriss Spalvins. "Extraction of bioactives from pumpkin by-products and determination of their antioxidant activity". W Research for Rural Development 2022 : annual 28th international scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2022. http://dx.doi.org/10.22616/rrd.28.2022.016.

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Agro-industrial and food processing from pumpkins (Cucurbitaceae) produces a large number of by-products: bark, pomace, seeds still rich in bioactive compounds, especially carotenoids and green pigments (proto chlorophyll (a and b) and proto pheophytin (a and b)), which exhibit a broad spectrum of health-promoting effects and can be used as ingredients in functional food and cosmetics. For extraction of bioactive compounds from dried pumpkin by-products different methods were used: supercritical CO2, Soxhlet extraction with n- hexane, ethanol. Vegetable oils (rapeseed, coconut, grapeseed and olive oil) were used as green solvent alternatives to conventional organic solvents for carotenoid extraction. Detection and analyses of chlorophylls and carotenoids was done with hexane/acetone, cyclohexane, ethanol as solvents. The aim of this study was to use pumpkin by-products for extraction of high-value bioactive compounds with different methods, to determine antioxidant´s content and profile – carotenoids (ß-carotene, lutein, lycopene, zeaxanthin), pigments (chlorophylls a, chlorophylls b) with different solvents and to find out what solvent can be used for detection of pigments and carotenoids; to determine antiradical scavenging activity of biologically active compounds in extracts from pumpkin by-products (peel and hulled seeds).
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Raporty organizacyjne na temat "Chlorophyll"

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Denisov, Yury Sergeevich. Extraction of chlorophyll with isopropanol. Luminescence of chlorophyll extract under ultraviolet light. DOI CODE, 2017. http://dx.doi.org/10.18411/chemistry-chemsts.com.

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Tollin, G. Chlorophyll photochemistry in microheterogeneous media. Office of Scientific and Technical Information (OSTI), grudzień 1989. http://dx.doi.org/10.2172/7152223.

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Weinstein, J. The magnesium chelation step in chlorophyll biosynthesis. Office of Scientific and Technical Information (OSTI), listopad 1990. http://dx.doi.org/10.2172/6074407.

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Weinstein, J. D. The magnesium chelation step in chlorophyll biosynthesis. Office of Scientific and Technical Information (OSTI), styczeń 1991. http://dx.doi.org/10.2172/5109357.

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Paran, Ilan, i Allen Van Deynze. Regulation of pepper fruit color, chloroplasts development and their importance in fruit quality. United States Department of Agriculture, styczeń 2014. http://dx.doi.org/10.32747/2014.7598173.bard.

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Pepper exhibits large natural variation in chlorophyll content in the immature fruit. To dissect the genetic and molecular basis of this variation, we conducted QTL mapping for chlorophyll content in a cross between light and dark green-fruited parents, PI 152225 and 1154. Two major QTLs, pc1 and pc10, that control chlorophyll content by modulation of chloroplast compartment size in a fruit-specific manner were detected in chromosomes 1 and 10, respectively. The pepper homolog of GOLDEN2- LIKE transcription factor (CaGLK2) was found as underlying pc10, similar to its effect on tomato fruit chloroplast development. A candidate gene for pc1was found as controlling chlorophyll content in pepper by the modulation of chloroplast size and number. Fine mapping of pc1 aided by bulked DNA and RNA-seq analyses enabled the identification of a zinc finger transcription factor LOL1 (LSD-One-Like 1) as a candidate gene underlying pc1. LOL1 is a positive regulator of oxidative stress- induced cell death in Arabidopsis. However, over expression of the rice ortholog resulted in an increase of chlorophyll content. Interestingly, CaAPRR2 that is linked to the QTL and was found to affect immature pepper fruit color in a previous study, did not have a significant effect on chlorophyll content in the present study. Verification of the candidate's function was done by generating CRISPR/Cas9 knockout mutants of the orthologues tomato gene, while its knockout experiment in pepper by genome editing is under progress. Phenotypic similarity as a consequence of disrupting the transcription factor in both pepper and tomato indicated its functional conservation in controlling chlorophyll content in the Solanaceae. A limited sequence diversity study indicated that null mutations in CaLOL1 and its putative interactorCaMIP1 are present in C. chinensebut not in C. annuum. Combinations of mutations in CaLOL1, CaMIP1, CaGLK2 and CaAPRR2 are required for the creation of the extreme variation in chlorophyll content in Capsicum.
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Eaton-Rye, Dr., Julian, i Gaozhong Shen. Specific mutagenesis of a chlorophyll-binding protein. Progress report. Office of Scientific and Technical Information (OSTI), styczeń 1990. http://dx.doi.org/10.2172/5701773.

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Vermaas, W. F. J. The chlorophyll-binding protein CP47 in photosystem II. Progress report. Office of Scientific and Technical Information (OSTI), czerwiec 1994. http://dx.doi.org/10.2172/10155644.

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Vermaas, W. F. J. The chlorophyll-binding protein CP47 in photosystem II. Final report. Office of Scientific and Technical Information (OSTI), grudzień 1995. http://dx.doi.org/10.2172/207435.

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Weinstein, J. D. The magnesium chelation step in chlorophyll biosynthesis. Progress report 1993. Office of Scientific and Technical Information (OSTI), grudzień 1993. http://dx.doi.org/10.2172/96912.

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Soell, D. [The first steps of chlorophyll synthesis: RNA involvement and regulation]. Office of Scientific and Technical Information (OSTI), styczeń 1992. http://dx.doi.org/10.2172/6528189.

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