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Gotowe bibliografie tematyczne / Amaranthus retroflexus

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Gotowa bibliografia na temat „Amaranthus retroflexus”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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Artykuły w czasopismach na temat "Amaranthus retroflexus"

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Hutsko, K. I. "AMARANTHUS AS A SOURCE OF POLYPHENOLIC COMPOUNDS AND FLAVONOIDS FOR USE IN MEDICINE." Biotechnologia Acta 17, no. 2 (2024): 46–48. http://dx.doi.org/10.15407/biotech17.02.046.

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Amaranth is used as a medicinal plant with antioxidant, hemostatic, and wound-healing properties. The aim of the research is the quantitative determination of polyphenolic compounds and flavonoids in ethanolic extracts of amaranth seeds of the "Lera" and "Ultra" varieties and leaves Amaranthus retroflexus. Methods. Extracts were obtained by infusion for 7 days in 70% and 80% ethanol. Quantitative determination of secondary metabolites was conducted by spectrophotometric methods. Results. The largest amount of polyphenolic compounds was found in the ethanolic extract of Amaranthus retroflexus l

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Mitich, Larry W. "Redroot Pigweed (Amaranthus retroflexus)." Weed Technology 11, no. 1 (1997): 199–202. http://dx.doi.org/10.1017/s0890037x00041579.

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“… To the ground, With solemn adoration, down they cast Their crowns, inwove with amaranth and gold. Immortal amaranth, a flower which once In Paradise, fast by the tree of life, Began to bloom.”–John Milton (1608–1676), Paradise LostRedroot pigweed (Amaranthus retroflexus L.), one of the New World's major weeds, was described in 1753 by Carolus Linnaeus in Species Plantarum. Over three decades later (1789), the genu wa placed in Amaranthaceae by Antoine Laurent de Jussieu (1748–1836) (Britton and Brown 1898). Amaranthaceae belongs to Centrospermae, a group of familie that contain betalain pig

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Hutsko, K. I., та R. O. Petrina. "Аmaranth as a source of secondary metabolites with potential wound-healing activity". Chemistry, Technology and Application of Substances 7, № 2 (2024): 92–99. https://doi.org/10.23939/ctas2024.02.092.

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Amaranth is a multi-purpose crop, known for its wound-healing properties. Amaranth leaves and seeds contain polyphenols and flavonoids that improve wound healing. Ethanol extracts of amaranth seeds of “Lera” and “Ultra” varieties and ethanol extract of leafs Amaranthus retroflexus were obtained. Determination of the content of polyphenolic compounds in the extracts was conducted by the spectrophotometric method with the Folin-Checolteau reagent. The number of flavonoids in the extracts was determined by the spectrophotometric method using aluminum chloride.. The most polyphenolic compounds and

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Božić, Dragana. "Amaranthus retroflexus L.: Redroot pigweed." Acta herbologica 27, no. 1 (2018): 5–19. http://dx.doi.org/10.5937/actaherb1801005b.

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Moran, Patrick J., and Allan T. Showler. "Phomopsis amaranthicola and Microsphaeropsis amaranthi Symptoms on Amaranthus spp. Under South Texas Conditions." Plant Disease 91, no. 12 (2007): 1638–46. http://dx.doi.org/10.1094/pdis-91-12-1638.

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Temperature, humidity, weed species and age, and inducible responses in the host are factors that could limit the efficacy of fungal bioherbicides. The influences of these factors on the efficacy of the fungal bioherbicides Phomopsis amaranthicola and Microsphaeropsis amaranthi against Palmer amaranth (Amaranthus palmeri), smooth pigweed (Amaranthus hybridus), and redroot pigweed (Amaranthus retroflexus) were investigated in greenhouse and field studies under south Texas conditions. Despite plants being given an initial dew period, the bioherbicides, applied individually or in combination, did

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Khan, Asad M., Ahmadreza Mobli, Jeff A. Werth, and Bhagirath S. Chauhan. "Germination and seed persistence of Amaranthus retroflexus and Amaranthus viridis: Two emerging weeds in Australian cotton and other summer crops." PLOS ONE 17, no. 2 (2022): e0263798. http://dx.doi.org/10.1371/journal.pone.0263798.

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Redroot pigweed (Amaranthus retroflexus L.) and slender amaranth (Amaranthus viridis L.) are becoming problematic weeds in summer crops, including cotton in Australia. A series of laboratory and field experiments were performed to examine the germination ecology, and seed persistence of two populations of A. retroflexus and A. viridis collected from the Goondiwindi and Gatton regions of Australia. Both populations of A. retroflexus and A. viridis behaved similarly to different environmental conditions. Initial dormancy was observed in fresh seeds of both species; however, germination reached m

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Song, Weifeng, Qinghui Wei, Zhenghao Shi, Yaqing Pan, Zhiyong Li, and Fangyuan Wang. "Integrating transcriptome and metabolomics revealed the key metabolic pathway response of Amaranthus retroflexus L. to the resistance to fomesafen." PLOS ONE 20, no. 2 (2025): e0312198. https://doi.org/10.1371/journal.pone.0312198.

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Background Amaranthus retroflexus L. is one of the main broad-leaved weeds in soybean fields in Heilongjiang Province and is an important factor affecting soybean yield. It is becoming increasingly resistant to herbicides. However, studies on the transcriptome level and the molecular mechanism of secondary metabolite accumulation of resistant varieties of Amaranthus retroflexus L. have not been reported. Therefore, comprehensive analysis of transcriptome and metabolome is needed to determine the key metabolic pathways and key genes of Amaranthus retroflexus L. Results The biosynthetic pathway

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Qian, Guangtao, Zhicai Wang, Lei Zhang, et al. "Chemical Compositions of Amaranthus retroflexus." Chemistry of Natural Compounds 52, no. 6 (2016): 982–85. http://dx.doi.org/10.1007/s10600-016-1841-y.

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Karaeva, Julia, Svetlana Timofeeva, Marat Gilfanov, et al. "Exploring the Prospective of Weed Amaranthus retroflexus for Biofuel Production through Pyrolysis." Agriculture 13, no. 3 (2023): 687. http://dx.doi.org/10.3390/agriculture13030687.

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Amaranthus retroflexus or redroot pigweed is a second generation lignocellulosic fuel. Each biomass sample (leaves, inflorescences and stems) was pyrolyzed in a lab-scale furnace, in a nitrogen atmosphere under non-isothermal conditions at heating rates of 10 °C/min until the furnace temperature reached 550 °C. The pyrolysis characteristics of the three major components were also studied through thermogravimetric analysis. The thermal decomposition of the biomass samples is similar to the process of pyrolysis of lignocellulosic materials and proceeds in three main stages: dehydration, devolati

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Lacatus, Mihaela, Patricia Tarkanyi, Luminita Pirvulescu, et al. "Nutrient Status and Antioxidant Activity of the Invasive Amaranthus retroflexus L." Sustainability 17, no. 11 (2025): 5141. https://doi.org/10.3390/su17115141.

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Amaranthus retroflexus L. is widely regarded as one of the world’s most invasive weeds, often linked to significant agricultural losses due to its resilience and herbicide resistance. However, unlike other amaranth species already recognized for their health benefits, A. retroflexus remains largely overlooked as a potential nutritional and pharmacological resource. This study investigates whether this abundantly growing plant could be repurposed as sustainable food. We focused on three main questions: Can weed be transformed into a food source? Does A. retroflexus offer comparable nutritional

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Rozprawy doktorskie na temat "Amaranthus retroflexus"

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Ferguson, Gabrielle Mary. "ALS-inhibitor resistance in populations of Amaranthus powellii S. Wats. and Amaranthus retroflexus L." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0023/MQ51062.pdf.

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Ghorbani, Reza. "Biological control of the weed Amaranthus retroflexus with fungal pathogens." Thesis, University of Aberdeen, 2000. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602046.

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Amaranthus retroflexus is a common annual weed world-wide and causes substantial yield reduction in many crops. In this research program three main objectives were fulfilled: firstly the effect of certain environmental parameters on germination and emergence of A. retroflexus collected from Iran were determined; secondly, potential pathogen strains as biological control agents for A. retroflexus were identified; and finally the activity of a candidate biological control agent against the target weed under various environmental conditions and with different formulation were evaluated. Results o

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Omami, Elizabeth Nabwile, of Western Sydney Hawkesbury University, of Agriculture Horticulture and Social Ecology Faculty, and School of Horticulture. "Amaranthus retroflexus seed dormancy and germination responses to environmental factors and chemical stimulants." THESIS_FAHSE_HOR_Omami_E.xml, 1993. http://handle.uws.edu.au:8081/1959.7/66.

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A large number of weed seeds in the soil persist because of seed dormancy, and depletion of the seed bank through manipulation of seed dormancy has been suggested as one of the goals in weed control. This study was designed to investigate some of the factors which control dormancy and germination in Amaranthus retroflexus seeds. Germination studies were conducted at different temperatures, and either in continuous white light or in the dark. Higher temperatures increased germination and, although light interacted with temperature, its effect on germination varied with the temperature. In an at

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Nurse, Robert Edward. "Predispersal weed seed predation in soybean fields (Amaranthus retroflexus, Chenopodium album, Coleophora lineapuvella)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0019/MQ55699.pdf.

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Omami, Elizabeth Nabwile. "Amaranthus retroflexus seed dormancy and germination responses to environmental factors and chemical stimulants." Thesis, [S.l. : s.n.], 1993. http://handle.uws.edu.au:8081/1959.7/66.

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A large number of weed seeds in the soil persist because of seed dormancy, and depletion of the seed bank through manipulation of seed dormancy has been suggested as one of the goals in weed control. This study was designed to investigate some of the factors which control dormancy and germination in Amaranthus retroflexus seeds. Germination studies were conducted at different temperatures, and either in continuous white light or in the dark. Higher temperatures increased germination and, although light interacted with temperature, its effect on germination varied with the temperature. In an at

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Omami, Elizabeth Nabwile. "Amaranthus retroflexus seed dormancy and germination responses to environmental factors and chemical stimulants /." [S.l. : s.n.], 1993. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030603.091907/index.html.

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Chin, Alice. "Evaluation of Macrophoma sp. as a potential mycoherbicide for the control of Amaranthus retroflexus L. (redroot pigweed)." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23876.

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Amaranthus retroflexus L. (redroot pigweed) is a major weed of many crops in North America including corn, soybean, and potato. It can be readily controlled by chemical and cultural methods. However, some populations of A. retroflexus have developed resistance against the application of triazine herbicides. Biololical control could be an alternative method to control this weed species. In 1990, a Macrophoma sp. causing foliar lesions was isolated from redroot pigweed and the potential of this plant pathogenic fungus as a mycoherbicide was evaluated. Large numbers of infective propagules were p

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Begna, Sultan Hussein. "Agronomic and physiological aspects of competition for light between corn hybrids differing in canopy architecture and weeds." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35572.

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The problems associated with short growing seasons has led to the development of leafy-reduced stature (LRS) corn hybrids. These hybrids have more leaf area above the ear, more rapid leaf area development, shorter stature, earlier maturity, and better responses to high plant populations and narrow spacings than conventional hybrids. Plants grown in a reduced light environment are limited in carbon assimilation and this, in turn, results in reductions in growth and development. A way to supplement the availability of photosynthate is injection of sucrose into plant stems. The objective of this

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Książki na temat "Amaranthus retroflexus"

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Stegmaier, Carl Edward. Insects Associated with the Rough Pigweed, Amaranthus Retroflexus L. (Amaranthaceae). Creative Media Partners, LLC, 2021.

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Części książek na temat "Amaranthus retroflexus"

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Batsatsashvili, Ketevan, Naiba P. Mehdiyeva, Zaal Kikvidze, et al. "Amaranthus retroflexus L. Amaranthaceae." In European Ethnobotany. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-49412-8_137.

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Batsatsashvili, Ketevan, Naiba Mehdiyeva, Zaal Kikvidze, et al. "Amaranthus retroflexus L. Amaranthaceae." In European Ethnobotany. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-50009-6_137-1.

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Bussmann, Rainer W., Ketevan Batsatsashvili, and Zaal Kikvidze. "Amaranthus hybridus L. Amaranthus palmeri S. Watson Amaranthis spinosus L. Amaranthus retroflexus L. Amaranthaceae." In Ethnobotany of the Mountain Regions of Central Asia and Altai. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-77087-1_18-1.

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Bussmann, Rainer W., Ketevan Batsatsashvili, and Zaal Kikvidze. "Amaranthus hybridus L. Amaranthus palmeri S. Watson Amaranthus spinosus L. Amaranthus retroflexus L. Amaranthaceae." In Ethnobotany of the Mountain Regions of Central Asia and Altai. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-28947-8_18.

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Paniagua-Zambrana, Narel Y., Rainer W. Bussmann, Javier Echeverría, and Carolina Romero. "Amaranthus caudatus L. Amaranthus deflexus L. Amaranthus hybridus L. Amaranthus retroflexus L. Amaranthus spinosus L. Amaranthaceae." In Ethnobotany of Mountain Regions. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-77093-2_20-2.

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Paniagua-Zambrana, Narel Y., Rainer W. Bussmann, Javier Echeverría, and Carolina Romero. "Amaranthus caudatus L. Amaranthus deflexus L. Amaranthus hybridus L. Amaranthus retroflexus L. Amaranthus spinosus L. Amaranthaceae." In Ethnobotany of Mountain Regions. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-28933-1_20.

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Bussmann, Rainer W., Narel Y. Paniagua-Zambrana, Manana Khutsishvili, et al. "Amaranthus blitum L. Amaranthus blitoides S.Wats. Amaranthus caudatus Amaranthus cruentus L. Amaranthus hybridus L. Amaranthus palmeri S. Watson Amaranthus paniculatus L. Amaranthus retroflexus L. Amaranthus spinosus L.Amaranthaceae." In Ethnobotany of Mountain Regions. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-319-50009-6_137-2.

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Bussmann, Rainer W., Ketevan Batsatsashvili, Zaal Kikvidze, et al. "Amaranthus hybridus L. Amaranthus palmeri S. Watson Amaranthus spinosus L. Amaranthus retroflexus L. Atriplex hortensis L. Amaranthaceae." In Ethnobotany of Mountain Regions. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-77088-8_8-2.

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Bussmann, Rainer W., Ketevan Batsatsashvili, Zaal Kikvidze, et al. "Amaranthus hybridus L. Amaranthus palmeri S. Watson Amaranthus spinosus L. Amaranthus retroflexus L. Atriplex hortensis L. Amaranthaceae." In Ethnobotany of Mountain Regions. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-28940-9_8.

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Mapes-Sánchez, Cristina, Ángel Mujica-Sánchez, and Laura Cortés-Zárraga. "Amaranthus crassipes Schltdl Amaranthus cruentus L Amaranthus dubius Mart. ex Thell Amaranthus fimbriatus (Torr.) Benth. ex S. Watson Amaranthus graecizans L Amaranthus hybridus L Amaranthus hypochondriacus L Amaranthus palmeri S. Watson Amaranthus polygonoides L Amaranthus powellii S. Amaranthus retroflexus L Amaranthus spinosus L Amaranthus viridis L Amaranthus watsonii Standl Amaranthaceae." In Ethnobotany of the Mountain Regions of Mexico. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-319-77089-5_27-1.

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Streszczenia konferencji na temat "Amaranthus retroflexus"

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Vershinina, Z. R., L. R. Khakimova, L. R. Karimova, and Al Kh Baimiev. "Amaranthus retroflexus transgenic plants for phytoremediation." In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.267.

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Amaranthus retroflexus was transformed with the pph6 gene encoding the synthesis of a metal-binding peptide, which on average increased plant resistance to Cd and Ni by 15%, the accumulation of heavy metals in plants increased by an average of 25%.

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Didovich, S. V., A. N. Pas’, and O. P. Alekseenko. "Search of phyto-toxicity microorganisms for weeds." In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.060.

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Phyto-toxic strains for Ambrosia artemisiifolia, Amaranthus retroflexus, Cirsium arvense have been identified. The intensity of the lesion exceeded the control by 5-70 times (p < [0.0001-0.007]), depending on the strain and the location of the stomata.

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Didovich, S. V., O. P. Alekseenko, and A. N. Pas'. "Bioherbicides for controlling the number of weeds in the agrocenoses of the Crimea." In CURRENT STATE, PROBLEMS AND PROSPECTS OF THE DEVELOPMENT OF AGRARIAN SCIENCE. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-2020-5-9-10-16.

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The paper presents a study about the ecologization of plant protection from weeds. The strain of Bacillus sp. Msk4b with phytotoxicity 10-70 times higher compared to control was recommended for the development of bioherbicide technology against Amaranthus retroflexus L. and Ambrosia artemisiifolia L. Isolate of micromycete Msk3g with phytotoxicity 2-8 times higher compared to control was recommended against Cirsium arvense (L.) Scop. and Ambrosia artemisiifolia L.

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Brkovic, Dusko, Dalibor Tomic, and Snežana Brankovic. "DIVERZITET I ANALIZA KVALITATIVNOG SASTAVA BILJNE ZAJEDNICE STRNIŠTA KAO POTENCIJALNE KRME." In SAVETOVANJE o biotehnologiji sa međunarodnim učešćem. University of Kragujeva, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.049b.

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In the plant communities on stubble, 25 taxons were determined, classified into 22 genera and 13 families. Of the 7 most pre-stated families, five are present in this micro-company where asteraceae have 6 taxons (27.27%), Lamiaceae five species (20%) and Poaceae three representatives (12%). As feed can be used: Galinsoga parviflora Cav., Echinochloa crus-galli (L.) Beauv., Elymus repens (L.) Gould., Amaranthus retroflexus L., Chenopodium album L. and Leontodon hispidus L. Potentially toxic to domestic animals are: Colchicum autumnale L., Equisetum arvense L., Equisetum telmateia Ehrh., Ranuncu

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Meseldzija, Maja, Milica Dudic, Radovan Begovic, and Ivana Marjanovic. "EFIKASNOST KOMBINACIJE MEZOTRIONA I TERBUTILAZINA IZ RAZLIČITIH PREPARATA U USEVU KUKURUZA." In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.339m.

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The aim of study was to test the efficacy and phytotoxicity of Calaris pro (326 g kg-1 terbuthylazine+50 g kg-1 mesotrione) and Twister (125 g kg-1 terbuthylazine+50 g kg-1 mesotrione) on weeds in maize crop. The experiment was set up during 2017 at the Kruščić, by a random block system in four repetitions. High efficacy of herbicides was manifested on Abutilon theophrasti, Amaranthus retroflexus, Ambrosia artemisiifolia, Chenopodium album, Chenopodium hybridum, Cirsium arvense, Datura stramonium, Solanum nigrum, Setaria glauca, Hibiscus trionum and Xanthium strumarium, while low efficacy was

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Brković, Duško, Gorica Djelić, Snežana Branković, and Kristina Markeljić. "CONTRIBUTION TO THE RESEARCH OF THE FLORA AND HABITAT CHARACTERISTICS OF SP „BORAČKI KRŠ“ BORAČ." In 2nd International Symposium on Biotechnology. University of Kragujevac, Faculty of Agronomy, 2024. http://dx.doi.org/10.46793/sbt29.42db.

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The Natural Monument „Borački krš“, encompasses a part of the Rudnik-Kotlenik region and it is located in the southwestern Šumadija between Rudnički, Kotlenik and Gledić mountains on the municipality of Knić. In the research area, 117 taxa were identified, classified into 41 families. The most numerous species belong to the families Asteraceae (16) and Lamiaceae (9). The forest is hemicrypto-terrophytic with a strong participation of fanerophytes. The high percentage of terophytes and fanerophytes is particularly characteristic, as it indicates a very warm and dry vegetation period of habitat.

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Pyrko, A. N. "ENVIRONMENTALLY FRIENDLY SYNTHESIS AND BIOLOGICAL TESTING FOR PESTICIDAL ACTIVITY OF HETEROCYCLIC ANALOGS OF STEROIDS." In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-1-187-190.

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The aim of the study is the synthesis and testing for pesticidal activities of 2,3-dimethoxy-16,16-dimethyl-D-homo-8-azagona-1,3,5 (10),13-tetraene-12,17а-one and 2,3-dimethoxy-16,16-dimethyl-d-homo-8-azagona-1,3,5(10),13-tetraene-12-imino-17а-one hydrochloride which could become the basis of plant protection products. The first compound was obtained by condensation of 6,7-dimethoxy-2,3-dihydroisoquinoline with 2-acetyl-5.5-dimethylcyclohexane-1,3-dione. The second substance was synthesized by interaction of the first with ammonium chloride. The synthesized compounds were tested for certain ty

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Saulić, Markola, Uroš Mladenović, Miroslav Matejić, Marko Kovačević, and Aleksandar Stevanović. "IMPACT OF ENVIRONMENTAL CHANGES ON SOYBEAN WEED FLORA." In 12. JEEP INTERNATIONAL SCIENTIFIC AGRIBUSINESS CONFERENCE, MAK 2025 – KOPAONIK. Association science and business center WORLD; Institute for plant protection and environmen, 2025. https://doi.org/10.46793/mak2025.221s.

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Over the past decades, climate change has induced transformations in the weed flora of arable ecosystems. In soybean production, weeds can have a very negative impact on yield and grain quality and can complicate the harvest of the crop. Phytocenological assessments in soya before and POST-EM application showed 14 weed species were present: Abuthilon theophrasti L., Amaranthus retroflexus L., Ambrosia artemisiifolia L., Bilderdykia convolvulus L., Chenopodium album L., Cirsium arvense L., Convolvulus arvensis L., Echinochloa crus-galli L., Hibiscus trionum L., Lamium purpureum L., Portulaca ol

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Blagojević, Milan, Vera Rašković, and Nemanja Stošić. "WEED PREVALENCE IN ONION AND POTATO CROPS DURING 2024." In Global Challenges Through the Prism of Rural Development in the Sector of Agriculture and Tourism GIRR 2024. Academy of Applied Studies Šabac, 2025. https://doi.org/10.46793/girr25.148b.

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Onion (Allium cepa L.) is one of the most commonly used vegetable crops for human consumption. To control weeds in onion crops, herbicides are used with a pre-emergence application time for crops and weeds (PRE-EM herbicides), as well as those with a post-emergence application time for crops and weeds (POST-EM herbicides). Potatoes (Solanum tuberosum L.) are grown on an area of 25 million hectares worldwide. About 70% of the area under potatoes is in Europe, where 80% of the total production is produced. Field research on the floristic composition of weeds was conducted during May 2024 in onio

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