Výsledky vyhledávání - "Aleksandrs Petjukevičs"

Akademický článek

Influence of Accelerated Electron-Irradiation on Sorption Properties of Latvian Darkhead Sheep Wool Fibers

Autor: Liga AVOTINA, Arturs ZARINS, Nadina Tina VANAGA, Aleksandrs PETJUKEVICS, Magdalena RZEPNA, Antons PODJAVA, Vilnis PEIPINS, Gunta KIZANE

Publikováno v: Medžiagotyra, Vol 30, Iss 2, Pp 248-253 (2024)

Latvian Darkhead (LD) is a local sheep breed and a genetic resource in Latvia. Preservation and development of the sheep population in the local region is important for the recultivation of fields, it serves as a source for export and local use, as w

Externí odkaz: https://doaj.org/article/25395f4763974411ba688cb75765469e

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Akademický článek

Chlorophyll fluorescence changes, as plant early state indicator under different water salinity regimes on the invasive macrophyte Elodea canadensis (Michx., 1803)

Autor: Aleksandrs Petjukevics, Natalja Skute

Publikováno v: One Ecosystem, Vol 7, Iss , Pp 1-12 (2022)

Analysis of the photosynthetic apparatus provides information on the physiological state of plants. The changes of metabolites in plant cells analysed with the pulsed chlorophyll fluorometer make it possible to determine these changes in plant cells

Externí odkaz: https://doaj.org/article/5f3607026ffd4cdba994e884202fcb79

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EVALUATION OF CALCIUM CARBONATE CONTENT IN EGGSHELLS OF AVIAN, TURTLE, SNAIL, AND OSTRICH USING CHEMICAL ANALYSIS AND SCANNING ELECTRON MICROSCOPY

Autor: Inta Umbraško, Aleksandrs Petjukevičs, Nadežda Harlamova, Anna Batjuka

Publikováno v: ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference; Vol 1 (2021): Environment. Technology. Resources. Proceedings of the 13th International Scientific and Practical Conference. Volume 1; 244-249

In the present study, different eggs were collected and analyzed from five various animal species: European pond turtle (Emys orbicularis (Linnaeus, 1758)), giant African land snail (Achatina fulica (Bowdich, 1822)), common ostrich (Struthio camelus

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22c2d00d63d201eb2d47fb480bcff655
http://journals.ru.lv/index.php/ETR/article/view/6652

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Impact of moderate heat stress on the biochemical and physiological responses of the invasive waterweed Elodea canadensis (Michx. 1803)

Autor: Nataļja Škute, Aleksandrs Petjukevičs, Anna Batjuka, Marina Savicka

Publikováno v: Archives of Biological Sciences, Vol 70, Iss 3, Pp 551-557 (2018)

Paper description: The influence of climate change on biochemical and physiological changes in freshwater macrophytes has been widely studied. Most studies have focused on the responses to stressors such as hypoxia, salinity and heavy metals. Less at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95b6fbbea3bc70fca2a04108a915f91d
http://www.doiserbia.nb.rs/img/doi/0354-4664/2018/0354-46641800016S.pdf

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The influence of antimycin A on pigment composition and functional activity of photosynthetic apparatus in Triticum aestivum L. under high temperature

Autor: Anna Batjuka, Nataļja Škute, Aleksandrs Petjukevičs

Publikováno v: Photosynthetica. 55:251-263

The purpose of the current investigation was to evaluate the influence of antimycin A (AA) as an activator of the alternative respiratory pathway (AP) on photosynthetic pigment composition and functional activity of the photosynthetic apparatus of wh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::de5092d497f76ef681f7aea3891b0925
https://doi.org/10.1007/s11099-016-0231-9

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INFLUENCE OF FLOODING ON LEAF CELL MEMBRANES OF THREE LATVIAN WHEAT CULTIVARS (TRITICUM AESTIVUM (L))

Autor: Aleksandrs Petjukevičs, Nadežda Harlamova, Nataļja Škute, Alina Kulbachna, Marina Savicka

Publikováno v: ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference; Vol 1 (2019): Environment. Technology. Resources. Proceedings of the 12th International Scientific and Practical Conference. Volume 1; 287-290
Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference; Vol 1 (2019): Environment. Technology. Resources. Proceedings of the 12th International Scientific and Practical Conference. Volume 1; 287-290

Flooding occurs in many wheat-growing regions around the world. During flooding, the gas exchange between soil and air decreases and root hypoxia or anoxia is the major cause of plant growth reduction under this stress. The hypoxia stress triggers st

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b693d1aa77102b82303e5e2455ccffe5
http://journals.rta.lv/index.php/ETR/article/view/4084

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The impact of different levels of sodium chloride on the quantitative changes of chlorophyll and carotenoids in chloroplasts of Elodea canadensis (Michx. 1803)

Autor: Anna Batjuka, Aleksandrs Petjukevičs, Nataļja Škute

Publikováno v: Biologija. 61

In this study we used spectrophotometry to investigate the effect of negative concentrations of sodium chloride ions on photosynthetic pigments in Elodea canadensis (Michx. 1803). The concentrations of pigments, carotenoids, chlorophyll a and chlorop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56c760b881c2558552c88505e07adadd
https://doi.org/10.6001/biologija.v61i1.3109

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