Nanotechnology is being used effectively in many areas contemporarily. Silver nanoparticles (AgNPs) are one of the most crucial and remarkable nanomaterials involved in medical applications. These nanoparticles (NPs) have an important place in nanomedicine, nanotechnology, and in particularly, nanoscience. AgNPs are one of the most widely used materials in antibacterial and antiseptic practices. The synthesis of biogenic AgNPs has been applied as an alternative to physical and chemical synthesis. For this purpose, water extracts of Rhododendron ponticum were used for biosynthesis of AgNPs. Also, AgNPs were characterized by UV-vis spectrophotometer, scanning transmission electron microscope (STEM) and X-ray diffractometer (XRD). The antimicrobial activity of AgNPs synthesized with Rhododendron ponticum was analyzed by the Minimum Inhibition Concentration (MIC) test. Also, the biofilm inhibition test was made, and AgNPs showed a strong effect for biofilm inhibition. In addition, the prepared nanoparticles were tried for cytotoxicity activity with the help of MTT assay in MCF-7 and 4T1 cancer cell lines.
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http://dx.doi.org/10.1016/j.jpba.2019.112993 | DOI Listing |
Int J Biol Macromol
November 2024
PRISM Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland. Electronic address:
Rhododendron ponticum (R. ponticum), a rapidly spreading invasive species in Ireland, was investigated for its potential use in creating sustainable bioproducts. This study explored the utilization of R.
View Article and Find Full Text PDFPest Manag Sci
April 2024
UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), Université de Picardie Jules Verne, Amiens Cedex, France.
Background: The enemy release hypothesis (ERH) predicts that alien plant species are unsuitable hosts for native phytophagous insects. However, the biotic resistance hypothesis (BRH) predicts that generalist herbivores may prefer an alien plant over their common host plant. In this study, we have tested these two hypotheses by comparing the potential colonization of the invasive Pontic rhododendron (Rhododendron ponticum L.
View Article and Find Full Text PDFInt J Biol Macromol
December 2023
Materials Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland. Electronic address:
Rhododendron ponticum is an invasive species that spreads rapidly and is described as one of the biggest threats to peatlands in Ireland. This study offers an innovative approach to utilizing Rhododendron waste. Initially, sawdust was submitted to a bleaching treatment and the nanofibrillated cellulose (NFC) was obtained using two different methods: ultra-fine friction grinding and twin-screw extrusion with the assistance of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) pre-treatment.
View Article and Find Full Text PDFPhytochemistry
August 2023
Royal Botanic Gardens, Kew Green, Kew, Richmond, Surrey, TW9 3AE UK; Natural Resources Institute, University of Greenwich, Chatham Maritime, Kent, ME4 4TB, UK.
Grayanotoxin I (GTX I) is a major toxin in leaves of Rhododendron species, where it provides a defence against insect and vertebrate herbivores. Surprisingly, it is also present in R. ponticum nectar, and this can hold important implications for plant-pollinator mutualisms.
View Article and Find Full Text PDFPhilos Trans R Soc Lond B Biol Sci
June 2022
Department of Botany, School of Natural Sciences, Trinity College Dublin, Dublin 2, Ireland.
Plant compounds associated with herbivore defence occur widely in floral nectar and can impact pollinator health. We showed previously that nectar contains grayanotoxin I (GTX I) at concentrations that are lethal or sublethal to honeybees and a solitary bee in the plant's non-native range in Ireland. Here we further examined this conflict and tested the hypotheses that nectar GTX I is subject to negative pollinator-mediated selection in the non-native range, but that phenotypic linkage between GTX I levels in nectar and leaves acts as a constraint on independent evolution.
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