A5091545020- Fungal Biology and Applications
- Chemical synthesis and alkaloids
- Natural product bioactivities and synthesis
- Biological Activity of Diterpenoids and Biflavonoids
- Plant Pathogens and Fungal Diseases
- Phytochemistry and Biological Activities
- Essential Oils and Antimicrobial Activity
- Sesquiterpenes and Asteraceae Studies
- Mercury impact and mitigation studies
- Plant biochemistry and biosynthesis
- Allelopathy and phytotoxic interactions
- Plant and animal studies
- Forest Insect Ecology and Management
- Mycorrhizal Fungi and Plant Interactions
- Steroid Chemistry and Biochemistry
- Cholinesterase and Neurodegenerative Diseases
- Natural Compounds in Disease Treatment
- Phytochemical compounds biological activities
- Microbial Natural Products and Biosynthesis
- Botanical Research and Chemistry
- Insect-Plant Interactions and Control
- Botany, Ecology, and Taxonomy Studies
- Hymenoptera taxonomy and phylogeny
- Marine Bivalve and Aquaculture Studies
- Diatoms and Algae Research
University of Concepción
2015-2024
Instituto de Astrofísica de Canarias
2024
Universidad de La Laguna
2024
Asociación Colombiana de Facultades de Ingeniería
2024
Instituto Interamericano de Derechos Humanos
2023
Asociación por los Derechos Civiles
2023
National University of Trujillo
2021
Universidad de La Frontera
2020
Universidad Laica Eloy Alfaro de Manabí
2019
University of Alicante
2017
Abstract Five lignans (secoisolariciresinol, pinoresinol, eudesmin, lariciresinol, and lariciresinol-4- methyl ether) were isolated from an MeOH extract Araucaria araucana (Mol.) K. Koch wood for the first time in this species their structures determined with spectroscopic methods. The antimicrobial activities of these compounds bacteria Citrobacter sp., Bacillus subtilis, Escherichia coli, Micrococcus luteus, Staphylococcus aureus, Pseudomonas aeruginosa, white rooting staining fungi Mucor...
The antifungal activity of molecular identified Chilean saprobiontic fungi, Trichoderma viride, Schizophyllum commune and Trametes versicolor, on the fungal plant pathogens Botrytis cinerea Fusarium oxysporum, saprotrophic mould Mucor miehei was investigated using two types inhibition bioassay: (1) bi-compartmented Petri dishes (2) Erlenmeyer flasks connected by their upper parts. chemical composition volatile organic compounds (VOCs) released fungi also headspace solid-phase microextraction...
Ten sesquiterpenes (a-cubebene, copaene, a-caryophyllene, caryophyllene-4,5-epoxide, d-cadinene, cubenol, epicubenol, torreyol, humulene-1,2-epoxide, 15-copaenol) and six diterpenes (hinokione, hinokiol, ferruginol, 6,7-dehydroferruginol, totarol, sugiol) were isolated identified from Pilgerodendron uviferum (D. Don) Florin wood bark. The molecular structures elucidated by spectroscopic methods. Twelve pure compounds tested for antimicrobial activity against standard bacterial...
Abstract The potential neuroprotective properties of fruits have been widely recognized. In this study, we evaluated the protective a blueberry extract (BB‐4), rich in polyphenols, neurodegenerative model induced by amyloid‐β peptide (Aβ). Chronic treatment with Aβ drastically reduced synaptic transmission and extent secretory vesicles, which were recovered partially BB‐4. Also, Ca 2+ transients hippocampal neurons preincubated (0.5 5 μM) about 25% ± 3% 30% 2, respectively. work, demonstrate...
The invasion process of Acacia dealbata is partially mediated by releasing allelochemicals that affect native plants and soil microbes. However, non-volatile chemical compounds responsible for the allelopathic effect remain unknown, even though potential this species has been studied under Europe conditions. We examined aqueous extracts obtained from different plant materials A. dealbata: litter leaf, flowers, pods seeds fresh leaves also extract's phytotoxicity evolution on germination...
Plant species that growth close to or under the canopy of Acacia dealbata Link (Fabaceae, subfamily: Mimosoideae) within its non-native range, survive with difficulty not at all, especially if they are native.This phenomenon has been attributed allelopathy; one strategies used by A. trigger an invasion process.Native Quillaja saponaria Molina (tree) and Helenium aromaticum (Hook.)H.L. Bailey (herb), share dealbata's range in South-central Chile.This study was performed on Mediterranean...
The Chilean Sepedonium aff. chalcipori strain KSH 883, isolated from the endemic Boletus loyo Philippi, was studied in a polythetic approach based on chemical, molecular, and biological data. A taxonomic study of using molecular data ITS, EF1-α, RPB2 barcoding genes confirmed position within S. clade, but also suggested separation this clade into three different species. Two new linear 15-residue peptaibols, named chilenopeptins (1) B (2), together with known peptaibols tylopeptins (3) (4)...
Acetylcholinesterase is an important target for control of neurodegenerative diseases causing cholinergic signaling deficit. Traditionally, galanthamine has been used as Amaryllidaceae-derived acetylcholinesterase inhibitor, although new Amaryllidaceae plants could serve source better inhibitors. Therefore, the objective this study was to characterize alkaloid composition from bulbs Rhodolirium andicola (Poepp.) Traub, a native Chilean specie, and assess their inhibitory activity on by in...
Essential oils obtained from Gomortega keule, Laurelia sempervirens, Origanum vulgare, Eucalyptus globulus, and Thymus vulgaris were analyzed by gas chromatography chromatography-mass spectrometry evaluated for their toxicity against adults of Sitophilus zeamais (Motschulky) Acanthoscelides obtectus (Say) (Coleoptera).Contact was assayed impregnating filter paper discs with the oils.The amount essential applied in each desiccator (4 l capacity) 4, 8, 16, or 32 µl, corresponding to 1, 2, 8...
Components of essential oils from the Chilean Monimiaceae, boldo (Peumus boldus Mol.), tepa (Laureliopsis philippiana (Looser) Schodde), and laurel (Laurelia sempervirens (Ruiz & Pav.) Tul.) were determined using Gas Chromatography-Mass Spectrometry (GCMS) fungistatic activity was tested against Rhizoctonia solani Kühn (Donk), Pythium irregulare Buisman, Ceratocystis pilifera (Fr.) C. Moreau, Phragmidium violaceum (Schultz) G. Winter, Fusarium oxysporum Schltdl.The Monimiaceae species shared...
Alzheimer's disease (AD) is characterized by the presence of different types extracellular and neurotoxic aggregates amyloid-β (Aβ). Recently, bioactive compounds extracted from natural sources showing neuroprotective properties have become
From the fruiting body of ectomycorrhizal fungi Cortinarius xiphidipus, sterols were identified from crude extract and cytotoxic effect ergosta-4, 6, 8(14), 22-tetraen-3-one (ergone) was evaluated. Ten including ergosta-3,5,7,9(11),22-pentaene, (22E)-ergosta-5,7,9(11),22-tetraen-3b-ol, (3β,22E)-ergosta-5,7,22-trien-3-ol, (22E)-ergosta-7,22-dien-3-ol, neoergosterol, (3β)-ergosta-5,8-dien-3-ol, (3β)-ergosta-7-en-3-ol, stigmasterol, stigmasterol 22,23-dihydro...
From the aerial parts of Maytenus disticha, we have isolated 9β-benzoyloxy-1α,2α,6β,8α,15- penta-acetoxy-dihydro-β-agarofuran (1) and from seeds boaria 9β-furoyloxy-1α, 6β, 8α-triacetoxy-dihydro-β-agarofuran (2). These compounds their MeOH hexane/ethyl acetate (1:1 v/v) extracts were evaluated for effects on fall armyworm (Spodoptera frugiperda). Toosendanin, a commercial insecticide derived Melia azedarach was used as positive control. When tested activity using neonate larvae in nochoice...
In the present work we carried out a comparative study of total phenolic contents and antioxidant capacity aqueous leaf extracts Ugni molinae Turcz., Myrtaceae (infusion Soxhlet extracted) prepared from continent Juan Fernández Island samples. The results revealed that phenol content (TPC), tannins (TTC) flavonoids (TFC) for U. extracts) island leaves were 38.5, 56.7 37.5% higher than those obtained with continent, respectively. Also, HPLC profiles showed important differences between...
Due to the increasing emergence of resistance bacterial pathogens current antibiotics, we have examined marine fungi present in sea sediments obtained 200 m offshore discover new antibacterial compounds active against multidrug-resistant bacteria. One strain, identified as Emericellopsis minima, was isolated from Talcahuano Bay (Chile). From liquid culture E. Emerimicin IV, a unique fungal peptaibol that exhibited activity. The structure this compound assigned by interpretation 1H NMR and...