Browsing by Author "Niemeyer Marich, August"
Now showing items 1-18 of 18
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(Universidad de Chile., 2021)El cobre (Cu) es uno de los principales micronutrientes para los organismos; sin embargo, su acumulación en altas concentraciones y su posterior traspaso a otros organismos a lo largo de la cadena trófica pueden causar ...
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(2007)Transgenerational maternal effects on performance (r(m)) after host transfer were evaluated in the generalist aphid Myzus persicae s.s., and in its subspecies specialized on tobacco, M. persicae nicotianae Blackman. We ...
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(Elsevier, 2015)Insects are able to learn from experience acquired in their natal habitat, thereby obtaining adaptive advantages. However, the acquisition of new information could involve defects in retrieving previously learned information ...
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(Elsevier, 2015)Pre-Hispanic Andean textiles constitute the longest continuous textile record in the world, their structure and design being one of the most significant markers of group identity in Andean populations. Since the Late ...
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(2001)Feeding by the aphid Sipha flava produces a reddish spot on mature leaves of Sorghum halepense. The present work is aimed at determining whether this plant response entails induced resistance against the aphid. Old and ...
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(1991)The aerial parts of Senecio zoellneri afforded, in addition to known compounds, five oxygenated furoeremophilane derivatives and three seco-furoeremophilanolides, all of which are probably formed by oxidation of ...
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(2005)Decision-making during host selection by phytophagous insects has proved to be related to host range, with specialists taking faster decisions than generalists; however, this pattern fails to materialize in some host ...
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(Springer, 2010)Host-plants can mediate the interactions between herbivores and their mutualists and also between parasitic plants and their mutualists. The present study reveals how a hemiparasitic plant parasitizing three host species ...
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(1991)Ninety-four accessions of perennial Triticeae were examined for content of the hydroxamic acids DIBOA and DIMBOA. Levels of DIBOA (up to 44 mmolkg-1 fr. wt) were higher than those of DIMBOA (up to 4.5 mmol kg-1 fr.wt). The ...
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(1983)-DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one), a hydroxamic acid from the Gramineae involved in the resistance of cereals to aphids, inhibits. © 1983.
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(1990)The extract of the aerial parts of Gutierrezia espinosae gave 11 new and two known labdanes as well as five new nerylgeraniol derivatives. The structures were elucidated by high field 1H NMR spectroscopy. The chemotaxonomic ...
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(ELSEVIER, 2006-04-15)Opuntia scrublands are important ecological-economic systems in the Andean area. They perform a major role protecting slopes against erosion, improving the soil properties and providing a variety of products employed in ...
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(Elsevier, 2014)Consumption of psychoactive substances has been important in the lives of indigenous American people for several millennia. While numerous studies have reported the occurrence of smoking pipes at archaeological sites, ...
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Niveles de cortisol en cabellos de poblaciones prehispánicas de San Pedro de Atacama, norte de Chile (Universidad de Tarapacá, 2015)Systemic stress in prehispanic populations of San Pedro de Atacama (SPA) during the Middle and Late Intermediate periods was explored through cortisol analysis of hair samples of mummies from these periods. The cortisol ...
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(1991)The secondary metabolise 2,4-dihydroxy-1,4-benzoxazin-3-one (DIBOA) was found in seedlings of wild Hordeum species, but not of cultivated barley (Hordeum vulgare). DIBOA levels correlated negatively with performance of the ...
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(Soc. Amer. Archaeology, 2015)Smoking pipes found in funerary contexts on the Atacama Desert coast suggest that the custom of smoking was widespread among hunter-gatherers and fishermen during the Formative (1500 B.C.- cal A.D. 1000). The substances ...
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(Universidad Católica del Norte, 2015)Vertebral osteophytosis was studied as a marker for physical stress in prehistoric populations of San Pedro de Atacama from the Middle (400 - 1.000 A.D.) and Late Intermediate (1.000 - 1.450 A.D.) periods. The mean degree ...
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(1982)An insect inhibitor isolated from maize extracts, 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), reacted with cysteine, mercaptoethanol, ethane. © 1982.
