Results 11 to 20 of about 16,231 (179)

CONSTITUÍNTES QUÍMICOS DE Protium paniculatum(BURSERACEAE) [PDF]

open access: yesActa Amazonica, 1994
Dos extratos etéreo e etanólico da casca da madeira de Protium paniculatumEngl. foram isolados α- e β-amirina (0,012%), β-sitosterol e estigmasterol (0,003%) e o ácido 3,3'-di-O-metilelágico (0,093%0).
Maria das G. B. ZOGHBI   +3 more
doaj   +9 more sources

Novel Calibration Approach for Monitoring Aerosol Hydrogen Isotopes Using Laser-Induced Breakdown Spectroscopy for Molten Salt Reactor Off-Gas Streams. [PDF]

open access: yesSensors (Basel), 2023
Online monitoring is a key challenge for the continued development of molten salt reactor (MSR) technology. Laser-induced breakdown spectroscopy (LIBS) has previously been demonstrated to be a viable tool for monitoring aerosolized species and noble ...
Andrews HB, McFarlane J.
europepmc   +2 more sources

Characterization, antimicrobial and antitumor activity of superoxide dismutase extracted from Egyptian honeybee venom (Apis mellifera lamarckii)

open access: yesJournal of Genetic Engineering and Biotechnology, 2023
Background Superoxide dismutase is an important antioxidative stress enzyme which is found in honeybee venom and has a wide pharmaceutical and medical applications.
Mohamed M. Abdel-Monsef   +4 more
doaj   +1 more source

Exploring the links between secondary metabolites and leaf spectral reflectance in a diverse genus of Amazonian trees

open access: yesEcosphere, 2021
Plant defense chemistry is often hypothesized to drive ecological and evolutionary success in diverse tropical forests, yet detailed characterizations of plant secondary metabolites in tropical plants are logistically challenging.
Paul V. A. Fine   +5 more
doaj   +1 more source

New state record of Lopesia similis Maia (Insecta, Diptera, Cecidomyiidae) [PDF]

open access: yesCheck List, 2014
Lopesia similis Maia, 2004 (Insecta, Diptera, Cecidomyiidae) is recorded for the first time in the state of Mato Grosso do Sul. This species induces leaf galls on Protium heptaphyllum March (Burseraceae).
Sharlene da Silva, Valéria Maia
doaj   +3 more sources

Spatial distribution pattern and diameter structure of Protium Burm. f. in Iratapuru river sustainable development reserve, Amapá, Brazil

open access: yesActa Scientiarum: Biological Sciences, 2018
  The present work aims to determine the spatial distribution pattern of Protium Burm. f and the diametric structure of these species in a dense tropical submontane rainforest along the Sustainable Development Reserve (SDR) of the Iratapuru river.
Luciedi de Cassia Leoncio Tostes   +4 more
doaj   +1 more source

Mel Amargo de Breu (Protium sp., Burseraceae) [PDF]

open access: yesActa Amazonica, 2003
Foi analisada uma amostra de mel amargo procedente do Município de Mucajaí (Roraima, Brasil), Floresta de Apiaú. A análise polínica constatou a dominância de pólen de breu (Protium sp.) compreendendo 60,9% do total de grãos de pólen.
Antonio Carlos MARQUES-SOUZA   +1 more
doaj   +1 more source

Constituintes químicos do caule de Protium hebetatuml (Burseraceae) Chemical constituents from the stem of Protium hebetatuml (Burseraceae)

open access: yesActa Amazonica, 2012
Protium é um gênero que se destaca na família Burceraceae, compreende cerca de 146 espécies, das quais um pequeno número tem sido estudada do ponto de vista fitoquímico.
Túlio de Orleans Gadelha Costa   +4 more
doaj   +1 more source

Two new species and a new combination in Protium (Burseraceae) from Costa Rica

open access: yesPhytoKeys, 2017
Two new species of Protium (Burseraceae) are described and illustrated: Protium aguilarii sp. nov., from the Pacific slope of the Osa Peninsula, Puntarenas Province, Costa Rica; and P. hammelii sp.
Daniel Santamaría-Aguilar   +1 more
doaj   +3 more sources

A test of the Geographic Mosaic Theory of Coevolution: investigating widespread species of Amazonian Protium (Burseraceae) trees, their chemical defenses, and their associated herbivore faunas

open access: yesFrontiers in Ecology and Evolution, 2023
IntroductionPlants and their insect herbivores represent a large fraction of the species in Amazonian forests and are often directly implicated in the origin and maintenance of biodiversity at local and regional scales.
Paul V. A. Fine   +10 more
doaj   +1 more source

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