Search Results - "Maia, Beatriz Helena L. N. Sales"
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7,7-Dimethylaporphine Alkaloids from the Stem of Guatteriopsis friesiana
Published in Journal of natural products (Washington, D.C.) (28-08-2009)“…Phytochemical investigation of a methanolic extract of the stem of Guatteriopsis friesiana afforded two new 7,7-dimethylaporphine alkaloids,…”
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2
Phytotoxic Neocassane Diterpenes from Eragrostis plana
Published in Journal of natural products (Washington, D.C.) (24-12-2020)“…Five new neocassane-like diterpenes (1–5) were isolated from the roots of Eragrostis plana. Their structures were elucidated by spectroscopic data, and the…”
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Essential Oils from Piper caldense C. DC. and Piper xylosteoides (Kunth) Steud.: Seasonal Variation of the Chemical Composition and Antimicrobial Activity
Published in Chemistry & biodiversity (01-11-2021)“…The essential oils (EOs) chemical composition can be affected by several environmental factors, impacting their desired biological activities. In this sense,…”
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4
Chemical composition and antimicrobial activity of the essential oils of the Amazon Guatteriopsis species
Published in Phytochemistry (Oxford) (01-06-2008)“…Isolation and identification of caryophyllene oxide (1), β-eudesmol (2), γ-eudesmol (3) and α-eudesmol (4) from the Guatteriopsis species are reported. The…”
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5
NOCTUIDAE-INDUCED PLANT VOLATILES: CURRENT SITUATION AND PROSPECTS
Published in Química Nova (2014)“…Noctuids are phytophagous lepidopterans with some species causing significant damage to agriculture. The host plants, in turn, have developed defense…”
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Prenylated Flavonoids from Roots of Dahlstedtia glaziovii (Fabaceae)
Published in Journal of the Brazilian Chemical Society (01-06-2014)“…A phytochemical study of roots of Dahlstedtia glaziovii (Fabaceae) furnished a new dibenzoylmethane (glaziovione), along with eighteen known compounds. Their…”
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Baccharis essential oils from the Atlantic Forest as sources of natural pesticides
Published in Industrial crops and products (01-09-2024)“…Substances derived from bioactive plants of the Atlantic Forest can potentially be used for agricultural pest control, with fewer environmental consequences…”
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Insecticidal and antifungal activities of Melaleuca rhaphiophylla essential oil against insects and seed-borne pathogens in stored products
Published in Industrial crops and products (01-08-2022)“…Essential oils (EOs) are substances with biological properties that can be used to inhibit insects and fungi in storage systems. The EOs from plants of the…”
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Absolute configuration of a rare dibenzoylmethane derivative from Dahlstedtia glaziovii (Fabaceae)
Published in Tetrahedron letters (10-01-2018)“…[Display omitted] •Absolute configuration of a dibenzoylmethane is determined for the first time.•Exciton chirality method in VCD is successfully applied to a…”
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Insecticidal activity, toxicity and biochemical alterations of Drimys brasiliensis essential oil against Spodoptera frugiperda
Published in Journal of pest science (27-09-2024)Get full text
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Characterization of the essential oils of two species of Piperaceae by one- and two-dimensional chromatographic techniques with quadrupole mass spectrometric detection
Published in Microchemical journal (01-07-2014)“…The essential oils are a notably complex natural mixture, and due to the complexity of the sample and of the analysis, new methods, such as two-dimensional gas…”
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Identification of defensive compounds in metathoracic glands of adults of the stink bug Dichelops melacanthus (Hemiptera: Pentatomidae)
Published in Journal of the Brazilian Chemical Society (2007)“…The contents of metathoracic glands of adults of the stink bug Dichelops melacanthus (Hemiptera: Pentatomidae) were analyzed. Compounds were identified by gas…”
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Toxicidade e atividade antioxidante de flavonoides das cascas das raízes de Lonchocarpus filipes Toxicity and antioxidant activity of flavonoids from Lonchocarpus filipes root bark
Published in Química nova (01-01-2009)“…The phytochemical investigation of dichloromethane extract from root bark of Lonchocarpus filipes Benth (Leguminosae) afforded four flavonoids including three…”
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Toxicidade e atividade antioxidante de flavonoides das cascas das raízes de Lonchocarpus filipes
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First report of alkaloids in the genus Guatteriopsis (Annonaceae)
Published in Biochemical systematics and ecology (01-02-2009)“…Based on a molecular phylogeny of Guatteria and its three smaller satellite genera Guatteriopsis, Guatteriella and Heteropetalum, Erkens et al. (2007)…”
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Volatile oil of Psidium cattleianum sabine from the Brazilian Atlantic forest
Published in The Journal of essential oil research (01-11-2008)“…The essential oil obtained by hydrodistillation of fresh leaves of Psidium cattleianum Sabine, collected in the Atlantic Forest in southeastern Brazil, was…”
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