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Journal articles on the topic 'Chlorophyll a-b'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Etinski, Mihajlo, Milena Petkovic, and Miroslav Ristic. "A study of the low-lying singlet and triplet electronic states of chlorophyll A and B." Journal of the Serbian Chemical Society 78, no. 11 (2013): 1775–87. http://dx.doi.org/10.2298/jsc130806096e.

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Chlorophylls have been extensively investigated both experimentally and theoretically owing to the fact that they are essential for photosynthesis. We have studied two forms of chlorophyll, chlorophyll a and chlorophyll b, by means of density functional theory. Optimization of S0, S1 and T1 states was performed with the B3-LYP functional. The computed fluorescence lifetimes show good agreement with the available experimental data. The electronic adiabatic energies of S1 and T1 states are 2.09/2.12 and 1.19/1.29 eV for chlorophyll a and chlorophyll b respectively. We discussed the implications

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2

Kusmita, Lia, and Leenawaty Limantara. "THE INFLUENCE OF STRONG AND WEAK ACID UPON AGGREGATION AND PHEOPHYTINIZATION OF CHLOROPHYLL A AND B." Indonesian Journal of Chemistry 9, no. 1 (2010): 70–76. http://dx.doi.org/10.22146/ijc.21564.

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Chlorophyll is green pigment that can be found in plant chloroplast. Higher plants usually have two kinds of chlorophylls, chlorophyll a and b. These green pigments are easily degraded by temperature, light intensity, oxygen, acid, and water. Water causes aggregation of chlorophyll, while acid causes pheophytinization of chlorophyll. Aggregation and pheophytinization process of chlorophyll are influenced by solvents. This study was conducted to observe the spectral difference of aggregated chlorophyll in acetone and methanol upon pheophytinization by strong (HCl) and weak acid (CH3COOH), in co

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Vaňková, Kateřina, Ivana Marková, Jana Jašprová, et al. "Chlorophyll-Mediated Changes in the Redox Status of Pancreatic Cancer Cells Are Associated with Its Anticancer Effects." Oxidative Medicine and Cellular Longevity 2018 (July 2, 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 antipro

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M., Priyadharshana, Girija M., Smitha V., Badhsheeba M.A., and Vadivel V. "Chlorophyll and carotenoid contents of some green leafy vegetables." World Journal of Advanced Research and Reviews 14, no. 3 (2022): 666–69. https://doi.org/10.5281/zenodo.7733056.

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In the present study, the chlorophyll and carotenoid contents of <em>Alternanthera sessilis, Moringa oleifera, Sesbania grandiflora, Piper betle, Trigonella foenum-graecum</em> and <em>Spinacia oleracea</em> were estimated. It is found that <em>Sesbania</em> <em>grandiflora</em> has the highest chlorophyll-a, chlorophyll-b and total chlorophyll contents among the six green leafy vegetables followed by <em>Piper betle</em>. Among the six green leafy vegetables, the highest contents of carotenoid (38.765mg/100g f.w) were recorded in the leaves of <em>

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5

Porra, R. J., W. Schäfer, E. Cmiel, Ingrid Katheder, and H. Scheer. "The Unexpected Reduction of the Vinyl Group of Chlorophyll b by Sodium Borohydride in Methanolic Extracts of Maize Leaves and Its Inhibition by 8-Hydroxyquinoline." Zeitschrift für Naturforschung C 48, no. 9-10 (1993): 745–48. http://dx.doi.org/10.1515/znc-1993-9-1011.

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Abstract During rapid extraction of chlorophylls from maize leaves under reducing conditions with methanol containing NaBH4, chlorophyll a remained unchanged but chlorophyll b yielded [7-hydroxymethyl]-chlorophyll b. The 3-vinyl group of chlorophyll b was also reduced forming significant am ounts, up to 60%, of [3-ethyl]-[7-hydroxymethyl]-chlorophyll b. This was unexpected since this reduction of the 3-vinyl group does not occur when isolated chlorophyll b is treated in an identical manner with methanolic borohydride. The vinyl-group of chlorophyll a is not reduced during the same extraction c

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6

Trukhachev, V. I., I. I. Seregina, S. L. Belopukhov, et al. "The effect of stressful ecological conditions on chlorophyll content in the leaves of spring wheat plants." IOP Conference Series: Earth and Environmental Science 981, no. 3 (2022): 032093. http://dx.doi.org/10.1088/1755-1315/981/3/032093.

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Abstract In short-term vegetative experiment studied the effect of the different combinations of nitrogen and zinc fertilizers on the chlorophyll content in the leaves of spring wheat plants of the Zlata variety. It is established that application of nitrogen fertilizers together with zinc in most combinations contributed to stabilization of synthesis processes of chlorophyll grains in the leaves of wheat. It is shown that in conditions of optimal water supply and in the conditions of ecological stress caused by drought the most optimal combinations were ammonium sulfate with zinc and urea wit

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7

Deepa, Srivastava, and K.Shukla. "EFFECT OF LEAVES EXTRACT OF IPOMOEA CAIRICA ON CHLOROPHYLL AND CAROTENOID IN PARTHENIUM HYSTEROPHOROUS L." International Journal of Research – Granthaalayah 4, no. 4 (2017): 103–7. https://doi.org/10.5281/zenodo.846661.

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Photosynthetic effects of the leaves extracts from Ipomoea cairica on Parthenium hysterophorus L were studied. Ipomoea cairica dried leaf powder (20g) was dissolved in distilled water (200ml) for foliar application. The seedlings were maintained under natural condition in Insect free net house. The experiment was carried out to analyze the effects of Ipomoea cairica leaves extract by measuring chlorophyll ‘a’, chlorophyll ‘b’, total chlorophyll and carotenoid contents in Parthenium. The experimental plants were sprayed 20 days after emergence and control plants were maintained by a simultaneou

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8

Siebke, Katharina, and Marilyn C. Ball. "Non-destructive measurement of chlorophyll b:a ratios and identification of photosynthetic pathways in grasses by reflectance spectroscopy." Functional Plant Biology 36, no. 11 (2009): 857. http://dx.doi.org/10.1071/fp09201.

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Equations for non-destructive determination of chlorophyll b : a ratios in grasses were developed from reflectance spectra of intact leaves of barley (Hordeum vulgare L.) and two barley mutants: clorina f2, which lacks chlorophyll b and clorina f104, which has a low chlorophyll b content. These plants enabled separation of effects of chlorophyll composition on reflectance spectra due to differential light absorption by chlorophylls a and b and to measure the effects of chlorophyll b on the contribution of fluorescence emitted by chlorophyll a to the reflectance spectra. Indices developed from

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9

Datt, Bisun. "Remote Sensing of Chlorophyll a, Chlorophyll b, Chlorophyll a+b, and Total Carotenoid Content in Eucalyptus Leaves." Remote Sensing of Environment 66, no. 2 (1998): 111–21. http://dx.doi.org/10.1016/s0034-4257(98)00046-7.

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10

Huh, Man Kyu. "Effect of Chlorophyll in Garlic Chives (Allium tuberosum) Leaves by Drought and pH." European Journal of Agriculture and Food Sciences 4, no. 3 (2022): 66–69. http://dx.doi.org/10.24018/ejfood.2022.4.3.508.

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Allium tuberosum Rotter (garlic chives) is a species of plant native to the Chinese province and naturalized elsewhere in Asia and around the world. In Korea, chives are boiled and used as seasoned vegetables or as soup ingredients, and are also used for chive kimchi and cucumber pickles. This paper describes experimental results for chlorophyll content and efficiency with drought stress and soil acidity on garlic chives. Analytical determination of total chlorophyll (a, b) was performed with spectrophotometer. Chlorophyll fluorescence analysis was used to measure photosynthetic parameters wit

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11

Tanaka, A., H. Ito, R. Tanaka, N. K. Tanaka, K. Yoshida, and K. Okada. "Chlorophyll a oxygenase (CAO) is involved in chlorophyll b formation from chlorophyll a." Proceedings of the National Academy of Sciences 95, no. 21 (1998): 12719–23. http://dx.doi.org/10.1073/pnas.95.21.12719.

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12

Chaicharoenaudomrung, Nipha, Anant Oonsivilai, and Ratchadaporn Oonsivilai. "Chlorophylls Contents in Echinocactus grusonii Extract." Advanced Materials Research 931-932 (May 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 col

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13

Loughlin, Patrick C., Robert D. Willows, and Min Chen. "Hydroxylation of the C132 and C18 carbons of chlorophylls by heme and molecular oxygen." Journal of Porphyrins and Phthalocyanines 19, no. 09 (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 synthesiz

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14

Paulsen, Harald. "CHLOROPHYLL a/b-BINDING PROTEINS." Photochemistry and Photobiology 62, no. 3 (1995): 367–82. http://dx.doi.org/10.1111/j.1751-1097.1995.tb02357.x.

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15

Zhao, Xuan, Ting Jia, and Xueyun Hu. "HCAR Is a Limitation Factor for Chlorophyll Cycle and Chlorophyll b Degradation in Chlorophyll-b-Overproducing Plants." Biomolecules 10, no. 12 (2020): 1639. http://dx.doi.org/10.3390/biom10121639.

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The chlorophyll (Chl) cycle is the metabolic pathway for Chl a and Chl b inter-conversion. In this pathway, Chl b is synthesized from Chl a by the catalyzing action of chlorophyllide a oxygenase (CAO). In contrast, Chl b is firstly reduced to produce 7-hydroxymethyl Chl (HMChl) a, which is catalyzed by two isozymes of Chl b reductase (CBR), non-yellow coloring 1 (NYC1) and NYC1-like (NOL). Subsequently, HMChl a is reduced to Chl a by HMChl a reductase (HCAR). CAO plays a pivotal role in Chl a/b ratio regulation and plants over-accumulate Chl b in CAO-overexpressing plants. NYC1 is more accumul

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16

Ribeiro, Flávia Santana, Lorena Gabrielle Fernandes Alves, Marcio Rosa, Narcisa Silva Soares, and Carlos André Gonçalves. "Pigmentos fotossintéticos como descritores de resposta a adubação organomineral em cana-de-açúcar (Saccharum Officinarum L.)." Revista Agraria Academica 5, no. 2 (2022): 103–10. http://dx.doi.org/10.32406/v5n2/2022/103-110/agrariacad.

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Sugarcane (Saccharum officinarum L.) comes from the Asian continent. Culture is of enormous importance to the Brazilian economy, being explored throughout the country, with the Southeast, Northeast and South as the largest production centers today. With the growing population, it has been increasingly sought to increase productivity and profitability with the cultivation of sugarcane with the help of agricultural and managerial techniques. Plant productivity is related to photosynthetic efficiency. One of the factors linked to this efficiency is the chlorophyll content, due to its direct conne

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17

Mińkowski, Karol, Monika Bartosiak, and 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, no. 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 e

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18

Zakirova, M. M., P. P. Radchevsky, Ya K. Tosunov, and P. A. Samarin. "Patterns of pigment content in leaves of frost-resistant technical grape varieties depending on varietal characteristics and growing season phases." Fruit growing and viticulture of South Russia 6, no. 90 (2024): 112–23. https://doi.org/10.30679/2219-5335-2024-6-90-112-123.

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Abstract. The study of the pigment complex of the main and lateral leaves of three dark-berry frost-resistant grape varieties of domestic breeding Vecherniy, Dmitriy and Kurchanskiy was carried out., The content of chlorophylls (a, b) and carotenoids in the phases of berry growth and ripening was determined using the spectrometric method. Based on the obtained data, the sum of chlorophylls, as well as the ratio of chlorophyll a to chlorophyll b and the sum of chlorophylls to carotenoids were calculated. It was revealed that the pigment content in the leaves depended on varietal characteristics

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19

Bobkov, Sergey, and Ivan Bychkov. "CONTENT OF PHOTOSYNTHETIC PIGMENTS IN ONTOGENESIS OF WILD AND CULTURAL PEA." Vestnik of Kazan State Agrarian University 16, no. 4 (2021): 10–14. http://dx.doi.org/10.12737/2073-0462-2021-10-14.

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The objective consisted in study of wild pea representatives on chlorophyll and carotenoid content for use in producing new varieties with high photosynthetic efficiency and optimal assimilate distribution. The research was conducted in 2016‑2017 in Federal Scientific Center of Legumes and Groat Crops (Orel). Plants were grown on experimental field with density 1.2 million plants/ha on triplicated plots 1 m2. Wild pea accessions k-5322 (asiaticum), k-3370 (elatius), k-4014 (elatius) from VIR collection and varieties Temp and Stabil were used. Wild accessions k-3370 and k-5322 had more chloroph

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20

Huh, Man Kyu, and Byeongryong Lee. "The Change of Chlorophyll Content and Chlorophyll Efficiency in Epipremnum aureum by Water and pH." European Journal of Botany 1, no. 2 (2022): 1–5. http://dx.doi.org/10.24018/ejbotany.2022.1.2.12.

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Epipremnum aureum (pothos) is an herbaceous species and is originated to tropical or subtropical South East Asia and Solomon islands. This study investigated the effect of excessive moisture on chlorophyll content and photosynthesis efficiency on E. aureum. The chlorophyll a, b, and total (chlorophyll a + b) contents were measured by using spectrophotometer. Fluorescence analysis for chlorophyll efficiency was measured with the PAM Chlorophyll Fluorometer. The chlorophyll content increases when moisture increases to 30%, but gradually decreases when it exceeds 40%. When the soil moisture was 8

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21

Akhmetzhanov, Daniel, and Inga Seregina. "Influence of various organomineral biological preparations on the productivity and composition of the chlorophyll complex of spring wheat." IOP Conference Series: Earth and Environmental Science 1420, no. 1 (2024): 012015. https://doi.org/10.1088/1755-1315/1420/1/012015.

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Abstract In a field experiment, the influence of various organomineral biological products on the yield and composition of the chlorophyll complex of spring wheat was studied. As a result of research, it was found that organomineral complexes have a positive effect on increasing productivity. Special implementation options using OMC+Zn and OMC+Si. In addition, organomineral biological products have a significant impact on the composition and structure of the chlorophyll complex. To analyze the chlorophyll complex, two indicators were studied: the total content of chlorophylls a and b, and the

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Vahtmäe, Ele, Jonne Kotta, Helen Orav-Kotta, Ilmar Kotta, Merli Pärnoja, and Tiit Kutser. "Predicting macroalgal pigments (chlorophyll a, chlorophyll b, chlorophyll a + b, carotenoids) in various environmental conditions using high-resolution hyperspectral spectroradiometers." International Journal of Remote Sensing 39, no. 17 (2017): 5716–38. http://dx.doi.org/10.1080/01431161.2017.1399481.

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Lobkova, G. V., E. I. Tikhomirova, and Z. A. Simonova. "Assessment of the effect of heavy metal salts on the photosynthetic activity of aquatic plants." Povolzhskiy Journal of Ecology, no. 3 (November 23, 2021): 310–18. http://dx.doi.org/10.35885/1684-7318-2021-3-310-318.

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The status of the photosynthetic pigments in the aquatic plants Lemna minor L. and Elodea canadensis Michx. under the action of Ni2+, Co2+, Cu2+ and Pb2+ acetate in concentrations 5.00, 2.50, 1.25, 0.62, 0.31, 0.15, 0.07, and 0.03 mg/L was assessed by changes in the fluorescence intensity of chlorophyll a and b and their ratio. It was established that nickel acetate in original solutions in all the above concentrations caused an increase in the fluorescence intensity of chlorophylls a and b in L. minor in relation to the control while the lead salt suppressed it. Co2+ acetate inhibits the fluo

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Palm, Daniel M., Alessandro Agostini, Vivien Averesch, et al. "Chlorophyll a/b binding-specificity in water-soluble chlorophyll protein." Nature Plants 4, no. 11 (2018): 920–29. http://dx.doi.org/10.1038/s41477-018-0273-z.

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Fritschi, F. B., and J. D. Ray. "Soybean leaf nitrogen, chlorophyll content, and chlorophyll a/b ratio." Photosynthetica 45, no. 1 (2007): 92–98. http://dx.doi.org/10.1007/s11099-007-0014-4.

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26

De Mesquita Alves, Jackson, Alex Serafim De Lima, Francisco Romário Andrade Figueiredo, et al. "Chlorophyll a fluorescence and development of zucchini plants under nitrogen and silicon fertilization." Agronomía Colombiana 38, no. 1 (2020): 45–52. http://dx.doi.org/10.15446/agron.colomb.v38n1.79172.

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Zucchini (Cucurbita pepo L.) has a great economic and productive potential in the semi-arid region of Brazil, due to the wide acceptance by consumers and quick financial return. The nitrate (NO3-) assimilation process in C3 plants such as zucchini is related to photorespiration, and Si accumulated near the stomata reduces the transpiration rate, making the photosynthesis cycle more efficient. The objective of this study was to evaluate the interaction between nitrogen and silicon fertilization ongrowth, chlorophyll index, and chlorophyll a fluorescence of zucchini plants. The treatments were d

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27

Li, Qin, Shuangzhen Zhou, Wenyu Liu, et al. "A chlorophyll a oxygenase 1 gene ZmCAO1 contributes to grain yield and waterlogging tolerance in maize." Journal of Experimental Botany 72, no. 8 (2021): 3155–67. http://dx.doi.org/10.1093/jxb/erab059.

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Abstract Chlorophylls function in photosynthesis, and are critical to plant developmental processes and responses to environmental stimuli. Chlorophyll b is synthesized from chlorophyll a by chlorophyll a oxygenase (CAO). Here, we characterize a yellow-green leaf (ygl) mutant and identify the causal gene which encodes a chlorophyll a oxygenase in maize (ZmCAO1). A 51 bp Popin transposon insertion in ZmCAO1 strongly disrupts its transcription. Low enzyme activity of ZmCAO1 leads to reduced concentrations of chlorophyll a and chlorophyll b, resulting in the yellow-green leaf phenotype of the ygl

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Mahfudh, Ihsan, Gunawan Widi Santosa, and Rini Pramesti. "Stabilitas Ekstrak Kasar Klorofil-a dan b Rumput Laut Caulerpa racemosa (Forsskal) J. Agardh 1873 pada Suhu dan Lama Penyimpanan yang Berbeda." Journal of Marine Research 10, no. 2 (2021): 184–89. http://dx.doi.org/10.14710/jmr.v10i2.29685.

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Caulerpa racemosa merupakan salah satu jenis rumput laut hijau (Chlorophyta) yang memiliki pigmen fotosintetik klorofil-a dan klorofil-b. Pigmen tersebut labil terhadap suhu dan cahaya. Tujuan penelitian ini adalah mengetahui pengaruh suhu dingin (9oC) dan suhu ruang (29oC) terhadap stabilitas ekstrak kasar pigmen klorofil dengan lama penyimpanan 7 hari. Metode yang digunakan pada penelitian adalah eksperimental laboratoris. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) faktorial dengan 2 faktor yaitu suhu (9oC, 29oC) dengan interval pengujian (1, 3, 5, 7 hari). Ekstr

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Liu, Man-Hai, Yi-Fen Li, and Bing-Huei Chen. "Preparation of Chlorophyll Nanoemulsion from Pomelo Leaves and Its Inhibition Effect on Melanoma Cells A375." Plants 10, no. 8 (2021): 1664. http://dx.doi.org/10.3390/plants10081664.

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Pomelo (Citrus grandis), an important fruit crop grown in tropical and subtropical areas, is cultivated mainly in Asian countries. The dominant pigment in pomelo leaves, chlorophyll, has been reported to possess many biological activities such as antioxidant, anti-inflammation and anticancer. The objectives of this study were to determine chlorophylls in Pomelo leaves by high-performance liquid chromatography-mass spectrometry (HPLC-MS) and to encapsulate the isolated chlorophylls from preparative column chromatography into a nanoemulsion system for elucidating the inhibition mechanism on the

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Cline, Kenneth. "Light-Harvesting Chlorophyll a/b Protein." Plant Physiology 86, no. 4 (1988): 1120–26. http://dx.doi.org/10.1104/pp.86.4.1120.

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HERNÁNDEZ, Lázaro, Octavio LOYOLA-GONZÁLEZ, Bárbara VALLE, et al. "Identification of Discriminant Factors after Exposure of Maize and Common Bean Plantlets to Abiotic Stresses." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 43, no. 2 (2015): 589–98. http://dx.doi.org/10.15835/nbha4329916.

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Adverse environmental conditions limit crop yield and better understanding of plant response to stress will assist the development of more tolerant cultivars. Maize and common bean plantlets were evaluated under salinity, high temperature, drought and waterlogged conditions to identify biochemical markers which could be useful for rapid identification of putative stress tolerant plants. The levels of phenolics (free, cell wall-linked, total), aldehydes including malondialdehyde andchlorophylls (a, b, total) were measured on stressed plantlets. Only two indicators were statistically non-signifi

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Sokolova, G. G., I. A. Kondrateva, and M. V. Kalgina. "Dynamics of chlorophyll concentration in the birch (Betula pendula) leaves under the conditions of technogenic pollution in the city of Biysk." Проблемы ботаники Южной Сибири и Монголии 22, no. 1 (2023): 355–59. http://dx.doi.org/10.14258/pbssm.2023068.

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The article considers the results of biochemical studies of chlorophyll content in leaves of birch growing in different conditions in the city of Biysk: control, parks, squares, highways, petrol stations, factories, thermal power plants. In park areas, compared with the control, the content of chlorophylls a and b and the a / b ratio are lower. The best conditions for the growth of birch trees (closeness of crowns, distance from highways, and lower frequency of attendance) contribute to an increase in the content of chlorophyll a and b in the leaves. The sparse location of trees in squares and

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Dewi, Eko Nurcahya, Lukita Purnamayati, and Irwandi Jaswir. "Effects of thermal treatments on the characterisation of microencapsulated chlorophyll extract of Caulerpa racemosa." International Food Research Journal 29, no. 6 (2022): 1279–92. http://dx.doi.org/10.47836/ifrj.29.6.05.

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Caulerpa racemosa is a macroalga that has a green pigment, that is, chlorophyll. Chlorophyll is highly sensitive to damage during heat processing. In the present work, C. racemosa chlorophyll extract was microencapsulated with fish gelatine and Arabic gum coatings, using a freeze-drying technique, to protect against heat damage. The microcapsules were subjected to high temperatures (120, 140, and 160°C) for 5 h. The protective effect of microcapsules on chlorophyll stability was assessed by measuring chlorophylls a and b degradation, total phenolic content, antioxidant activity, functional gro

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Martynov, A.V., T.V. Bomko, T.N. Nosalskaya, and T.V. Kabluchko-Baruah. "STRUCTURES AND BIOLOGICAL ACTIVITY OF CUPROPHYLLINS." Annals of Mechnikov Institute, no. 2 (June 7, 2017): 7–14. https://doi.org/10.5281/zenodo.803832.

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Chlorophylls (a, b) are the porphyrin compounds and most common chemical in the plant’s world. In fact, these compounds are an obligatory intermediate product both in energy metabolism and in plant catabolism. At the same time, currently there are few pharmaceutical preparations on the pharmaceutical market based on chlorophylls. Dyes based on hydrolyzed chlorophyll are successfully used in the food industry. Commercial chlorophylline is a copper complex of hydrolyzed chlorophylls. As shown earlier in TLC, the chlorophyllin mixture contains a large number of different compounds. It is like wat

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Мейсурова, Александра Федоровна, Екатерина Алексеевна Борисова, and Екатерина Михайловна Тарасова. "Assessment of the content of photosynthetic pigments in the lichen thallus Parmelia sulcata in urban conditions." Herald of Tver State University. Series: Biology and Ecology, no. 4(64) (December 28, 2021): 153–63. http://dx.doi.org/10.26456/vtbio232.

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Проведена оценка содержания пигментов в образцах лишайника Parmelia sulcata Taylor, собранных в рекреационных зонах города Твери разного уровня антропогенной трансформации и загрязнения. Выявлены существенные различия в содержании хлорофиллов a и b, что свидетельствует о высокой пластичности фотосинтетической системы. Уровень содержания Хл a в рекреационных зонах выше, чем в фоновых условиях. Высокая вариабельность значений концентраций Хл b свидетельствует о приоритетном значении пигментной системы при адаптации к изменению характеристик местообитания. При оценке уровня воздействия городской

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van Gurp, M., G. van Ginkel, and Y. K. Levine. "Fluorescence anisotropy of chlorophyll a and chlorophyll b in castor oil." Biochimica et Biophysica Acta (BBA) - Bioenergetics 973, no. 3 (1989): 405–13. http://dx.doi.org/10.1016/s0005-2728(89)80382-2.

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Ito, H., Y. Tanaka, H. Tsuji, and A. Tanaka. "Conversion of Chlorophyll b to Chlorophyll a by Isolated Cucumber Etioplasts." Archives of Biochemistry and Biophysics 306, no. 1 (1993): 148–51. http://dx.doi.org/10.1006/abbi.1993.1492.

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Tumuluri, Sreelakshmi, and Hasan Raza Syed. "EFFECT OF UV-A RADIATION ON PHOTOSYNTHETIC PIGMENTS OF SELECTED CROP PLANTS." Biolife 2, no. 1 (2022): 381–86. https://doi.org/10.5281/zenodo.7198144.

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<strong>ABSTRACT</strong>   The present work deals with the effect of UV-A radiation and UV-A along with growth regulators on certain pigments in four crop plants, red gram, groundnut, wheat and ragi. Plants were exposed to UV-A radiation for two hours (2 hr) and four hours (4 hr) daily and UV-A irradiated plants were given chemical treatment, AA, IAA and SA at every fortnight starting from seed stage to yield level. At every fortnight the total chlorophyll content, chlorophyll a (chl-a) and chlorophyll b (chl-b) content were estimated. Treatment with UV-A decreased chlorophyll content. C

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AROYEHUN, Fisayo S., Amos M. MAKINDE, and Musibau O. ISA. "Comparative Extraction of Chlorophylls in Selected Forest and Savanna Mosses Using Dimethylsulphoxide and Acetone." Notulae Scientia Biologicae 8, no. 3 (2016): 347–53. http://dx.doi.org/10.15835/nsb839877.

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The present study compared the extraction of chlorophylls from selected forest mosses (Hyophila involuta and Thuidium gratum) and derived savanna moss (Archidium ohioense) using dimethylsulphoxide (DMSO) and 80% acetone. The mosses were collected from natural populations found in the Central Campus of the Obafemi Awolowo University, Ile-Ife, Nigeria. The chlorophyll extractions process followed standard methods and the absorbance of the extracts were read on spectrophotometer at wavelengths of 645 nm and 663 nm respectively. The data obtained were later subjected to appropriate statistical ana

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Duong, Thi Phuong Lien*. "KINETIC OF CHLOROPHYLL DEGRADATION AND COLOR CHANGE IN BITTER GOURD DURING HEAT TREATMENT." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 4 (2016): 616–22. https://doi.org/10.5281/zenodo.49806.

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Thermal degradation kinetics of chlorophylls and visual green color loss in bitter gourd were investigated at 70, 80, 90 and 100°C. The loss of visual green color, as represented by the change of the –a value and the –a/b ratio measured by tristimulus colorimeter, All the degradation of chlorophyll a, chlorophyll b as well as visual green color loss followed a first–order reaction. The rate constants of all parameters increased with increasing temperature and followed the Arrhenius model. The activation energies for chlorophylls  a and b were determined as 32.90 &plu

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Mohd Amin, Siti Faridah, Roselina Karim, Yus Aniza Yusof, and Kharidah Muhammad. "Effects of Metal Concentration, pH, and Temperature on the Chlorophyll Derivative Content, Green Colour, and Antioxidant Activity of Amaranth (Amaranthus viridis) Purees." Applied Sciences 13, no. 3 (2023): 1344. http://dx.doi.org/10.3390/app13031344.

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The thermal process of green amaranth leads to the partial or complete degradation of chlorophyll pigments and loss of green colour due to the formation of chlorophyll derivatives. This study aimed to evaluate a stabilisation process utilising metal ions to obtain a stable green colour of metal-chlorophyll derivative complexes. In this study, the effects of CuSO4 (0–240 ppm), ZnCl2 (0–1800 ppm) ions, pH (4–9), and temperature (60–100 °C) on green amaranth purees with a constant time of 15 min were investigated. In tapered leaf amaranths, the sample depicted higher contents of chlorophyll a (0.

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Buhăianu, S., and Doina Carmen Jităreanu. "Variations of Chlorophyll Content at Abies alba and Nepeta pannonica Species According to Phenophase and Harvesting Area." Cercetari Agronomice in Moldova 52, no. 1 (2019): 74–78. http://dx.doi.org/10.2478/cerce-2019-0008.

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Abstract Chlorophylls from plants are photosynthetic pigments. Their quantity offers valuable informations about photosynthetic activity, growing and developing of plants. Photosynthetic pigments decrease quantitatively during senescence process or in stress conditions. The present study has been realized in laboratory conditions with material harvested from spontaneous flora. The purpose of this research was the investigation of variations of chlorophyll content from samples of biological material collected from Nepeta pannonica L. and Abies alba Mill. plants, from Câmpulung Moldovenesc and C

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Herrera, Marta, Isabel Viera, and María Roca. "HPLC–MS2 Analysis of Chlorophylls in Green Teas Establishes Differences among Varieties." Molecules 27, no. 19 (2022): 6171. http://dx.doi.org/10.3390/molecules27196171.

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Green teas are nonfermented teas, the quality of which is measured by the green color. However, this category encompasses a high number of tea varieties that differ in cultivation and processing. For example, leaf or stem/bubble tea, plants cultivated under a light or shadow regime, powdered or unpowdered tea, etc. These variables determine the different qualities among green teas (Matcha, Sencha, Gyokuro, etc.) and consequently their different values on the market. Our purpose is to determine if these variables can exert an influence on the chlorophyll profile and to establish a characteristi

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Vdovina, T. A., O. A. Lagus, A. N. Danilova, and E. A. Isakova. "The content of chlorophylls and carotenoids in the leaves of tree introducers of the Altai Botanical Garden." Проблемы ботаники Южной Сибири и Монголии 21, no. 1 (2022): 20–24. http://dx.doi.org/10.14258/pbssm.2022004.

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This article reflects the results of studies of the pigment system of 15 species of woody plants in the Altai Botanical Garden. The data obtained indicate the presence of species specificity in the content of chlorophylls a, b and carotenoids. In the studied species, the content of chlorophyll a varies from 5.38 mg/l to 19.28 mg/l, chlorophyll b from 0.43 mg/l to 5.09 mg/l, carotenoids from 4.65 mg/l to 8.34 mg/l .

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Mazurenko, B. O. "Productivity of triticale depending on the content of photosynthesizing pigments at anthesis." PLANT AND SOIL SCIENCE 12, no. 2 (2021): 15–22. http://dx.doi.org/10.31548/agr2021.02.015.

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Photosynthetic pigments play an important role in the accumulation of dry matter and they can be the markers of stress. Change in the ratio of chlorophyll A and B indicates physiological changes and adaptation of the organism to changes of environmental conditions. Sowing terms and application of nitrogen fertilizers are long-term factors, so the content of chlorophylls in the flag leaf indicates long-term adaptation of the photosynthetic system. Establishing a relationship between the chlorophyll content at anthesis and the accumulation of dry matter in posy-anthesis period indicates the vari

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Pesang, Martice Desi, James Ngginak, Alfred Gasper Onisimus Kase, and Coni Lisandra Balle Bisilissin. "Komposisi Pigmen pada Ulva sp., Padina australis dan Hypnea sp. dari Pantai Tablolong Provinsi Nusa Tenggara Timur." Jurnal Kelautan Tropis 23, no. 2 (2020): 225–33. http://dx.doi.org/10.14710/jkt.v23i2.5912.

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Indonesia has marine biological natural resources consisting of fish, seaweed, crabs and shrimp which are very potential. The purpose of this study was to determine the composition of pigments in Ulva sp (Chlorophyta), Padina australis (Paeophyta) and Hypnea sp (Rhodophyta) obtained from Tablolong waters. The method used in this research is descriptive qualitative and quantitative. Proof of pigment in samples using thin layer chromatography (TLC). The results of pigment analysis of Ulva sp obtained twelve color spots with identified pigment types consisting of chlorophyll a, chlorophyll b, xan

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Gorbatiuk, L. O., O. O. Pasichna, M. O. Platonov, S. P. Burmistrenko, I. M. Nezbrytska, and T. V. Vitovetska. "Peculiarities of the Influence of Oil Products on the Content and Ratio of Photosynthetic Pigments of Ceratophyllum demersum L." Hydrobiological Journal 59, no. 1 (2023): 81–93. http://dx.doi.org/10.1615/hydrobj.v59.i1.70.

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As a result of the performed investigations, it has been found that at the concentration of oil products, including petrol and diesel fuel, of 5.0 and 10.0 mg/L the content of photosynthetic pigments (chlorophylls <i>a</i> and <i>b</i> and carotenoids), and also (chlorophyll <i>a</i>/chlorophyll <i>b</i>) and (chlorophyll <i>a</i> &#43; chlorophyll <i>b</i>)/carotenoids ratios significantly decreased, which is indicative of inhibiting the vital activity of macrophytes. It has been shown that the pigment system of <i

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Ito, H., S. Takaichi, H. Tsuji, and A. Tanaka. "Properties of synthesis of chlorophyll a from chlorophyll b in cucumber etioplasts." Journal of Biological Chemistry 269, no. 35 (1994): 22034–38. http://dx.doi.org/10.1016/s0021-9258(17)31751-9.

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Brown, Robert S., and Charles L. Wilkins. "Laser desorption Fourier transform mass spectrometry of chlorophyll A and chlorophyll B." Journal of the American Chemical Society 108, no. 9 (1986): 2447–48. http://dx.doi.org/10.1021/ja00269a053.

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Jain, M., S. Tiwary, and R. Gadre. "Sorbitol-induced changes in various growth and biochemici parameters in maize." Plant, Soil and Environment 56, No. 6 (2010): 263–67. http://dx.doi.org/10.17221/233/2009-pse.

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Treatment of maize seedlings with different concentrations of sorbitol decreased the rate of germination substantially. Root and shoot length was also reduced by sorbitol treatment, however, decrease in root length was lower than shoot length. Incubation of leaf segments from maize seedlings grown in continuous light with sorbitol decreased the fresh weight and increased the dry weight in a concentration-dependent manner. Sorbitol treatment also reduced the total chlorophylls, chlorophyll a as well as chlorophyll b; the decrease in chlorophyll 'b' being more prominent than chlorophyll 'a', how

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