Ecological conditionality of the chemical structure of the main classes of natural pigments
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2024-02-22 16:11
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543.4:628.355 (1)
Metode de analiză spectrală. Metode de analiză optică (65)
Tehnică sanitară. Apă. Igienă sanitară. Tehnica iluminatului (286)
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KOLOMIETS, Irina , DRAGUTSAN, Igori. Ecological conditionality of the chemical structure of the main classes of natural pigments. In: Ecological and environmental chemistry : - 2022, Ed. 7, 3-4 martie 2022, Chișinău. Chisinau: Centrul Editorial-Poligrafic al USM, 2022, Ediția 7, Vol.1, p. 58. ISBN 978-9975-159-07-4.. 10.19261/eec.2022.v1
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Ecological and environmental chemistry
Ediția 7, Vol.1, 2022
Conferința "Ecological and environmental chemistry 2022"
7, Chișinău, Moldova, 3-4 martie 2022

Ecological conditionality of the chemical structure of the main classes of natural pigments

CZU: 543.4:628.355

Pag. 58-58

Kolomiets Irina , Dragutsan Igori
 
Institute of Ecology and Geography
 
Proiecte:
 
Disponibil în IBN: 3 martie 2022


Rezumat

Expression of the qualitative characteristics of solar radiation is cyclical and can cause a similar response in biological systems, manifested as adaptations both at the zonal (latitudinal) and seasonal levels. Biological adaptation could follow the path of the forming light-sensitive surfaces in living organisms, the absorption maximum of which coincides with the spectral maximum of the incident radiation. For such surfaces, the general laws of absorption of electromagnetic radiation are satisfied. They determine the relationship between the amount of absorption and the amount of absorbing substance (pigment). Pigments are characterized by a specific molecular structure, namely, the presence of a system of conjugated double bonds. Depending on the position and number of double bonds, the pigment absorbs the light of some parts of the visible (white) spectrum, with a certain wavelength. Therefore, each pigment has a corresponding color and a specific light absorption curve. The more double bonds in the pigment molecule are, the longer its absorption wave. According to the Grotthuss-Draper law (Protti & Fagnoni 2009), the chemical transformation of a substance can only be caused by the light absorbed by this substance, or in other words, only such light chemically acts on a colored body, the color of which is complementary to the body color, that is, which complements body color to white In the presented work, the distribution of representatives of the main pigment classes by months and depending on the qualitative characteristics of solar radiation (position of maximum) is given. The ecological conditionality of the structure of natural pigments is substantiated. Special attention is paid to the seasonal migration of K, Ca, and Mg in biological objects and their influence on the anthocyanin coloration. The synthesis of pigments by biological objects is considered as an adaptive unambiguous response to solar radiation in the range complementary to the color of the pigment. By the example of the potential flora of the Northern Region of the Republic of Moldova, the seasonal convergence of corolla color of flowering plants and the selective seasonal causation of pigment synthesis are proved.