Results 1 to 10 of about 77,718 (338)

Metabolomics reveals the origins of antimicrobial plant resins collected by honey bees. [PDF]

open access: yesPLoS ONE, 2013
The deposition of antimicrobial plant resins in honey bee, Apis mellifera, nests has important physiological benefits. Resin foraging is difficult to approach experimentally because resin composition is highly variable among and between plant families ...
Michael B Wilson   +4 more
doaj   +2 more sources

Experimental maturation of pine resin in sediment to investigate the formation of synthetic copal and amber [PDF]

open access: yesScientific Reports
Experimentally simulating fossil resin formation would improve our understanding of copal/amber and could simulate the diagenesis of resin inclusions. Resin from living Pinus underwent sediment-encased maturation under various temperature and pressure ...
Evan T. Saitta, Thomas G. Kaye
doaj   +2 more sources

Experimental induction of resins as a tool to understand variability in ambers [PDF]

open access: yesFossil Record, 2021
Amber is chiefly known as a preservational medium of biological inclusions, but it is itself a chemofossil, comprised of fossilised plant resin. The chemistry of today's resins has been long investigated as a means of understanding the botanical sources ...
L. J. Seyfullah   +5 more
doaj   +1 more source

Racemic Norlignans as Diastereoisomers from Ferula sinkiangensis Resins with Antitumor and Wound-Healing Promotion Activities

open access: yesMolecules, 2022
Ferulasinkins A–D (1–4), four new norlignans, were isolated from the resins of Ferula sinkiangensis, a medicinal plant of the Apiaceae family. All of them were obtained as racemic mixtures, chiral HPLC was used to produce their (+)- and (−)-antipodes ...
Ying-Shi Li   +4 more
doaj   +1 more source

Perspectives for Uses of Propolis in Therapy against Infectious Diseases

open access: yesMolecules, 2022
Propolis has gained wide popularity over the last decades in several parts of the world. In parallel, the literature about propolis composition and biological properties increased markedly.
Antonio Salatino
doaj   +1 more source

Hypergene alterations of succinite and its vulnerability under various environmental conditions

open access: yesGeo&Bio, 2021
The article describes the alteration of succinite under conditions of hypergenesis as a result of oxidation, including a change in colour, contraction of the outer surface and the appearance of microcracks, changes in the construction of the outer ...
U. Naumenko   +3 more
doaj   +1 more source

Pinoresinol stimulates keratinocyte proliferation and downregulates TNF‐α secretion in peripheral blood mononuclear cells: An experimental in vitro study

open access: yesHealth Science Reports, 2023
Background and Aims Natural coniferous resins are used in traditional medicine for the treatment of skin wounds. Coniferous wood resins (“callus” resin) are a mixture of abietic (resin) acids, lignans such as pinoresinol, and p‐coumaric acid.
Elias Haapakorva   +3 more
doaj   +1 more source

Transition of plant resins from the biosphere to the lithosphere

open access: yesGeo&Bio, 2020
In the article the authors consider in detail the process of transition of plant resins from the biosphere to the lithosphere, characterize the conditions and paleogeographic situation of such transition, the formation of deposits of resin minerals and ...
Viktor M. Matsui, Uliana Z. Naumenko
doaj   +1 more source

Species-level determination of closely related araucarian resins using FTIR spectroscopy and its implications for the provenance of New Zealand amber [PDF]

open access: yesPeerJ, 2015
Some higher plants, both angiosperms and gymnosperms, can produce resins and some of these resins can polymerize and fossilize to form ambers. Various physical and chemical techniques have been used to identify and profile different plant resins and have
Leyla J. Seyfullah   +2 more
doaj   +2 more sources

Increased resin collection after parasite challenge: a case of self-medication in honey bees? [PDF]

open access: yesPLoS ONE, 2012
The constant pressure posed by parasites has caused species throughout the animal kingdom to evolve suites of mechanisms to resist infection. Individual barriers and physiological defenses are considered the main barriers against parasites in ...
Michael D Simone-Finstrom, Marla Spivak
doaj   +1 more source

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