Results 21 to 30 of about 42,897 (262)

Development of a method for the derivatization of ethanolamines and its application to sand samples [PDF]

Journal of the Serbian Chemical Society, 2022
Nitrogen mustards are dangerous and available blistering chemical warfare agents. In the presented study, six derivatization methods are compared for the analysis of degradation products of the most important blistering nitrogen mustards (ethyl ...
Rozsypal Tomas
doaj   +1 more source

Diversified glucosinolate metabolism: biosynthesis of hydrogen cyanide and of the hydroxynitrile glucoside alliarinoside in relation to sinigrin metabolism in Alliaria petiolata

Frontiers in Plant Science, 2015
Alliaria petiolata (garlic mustard, Brassicaceae) contains the glucosinolate sinigrin as well as alliarinoside, a γ-hydroxynitrile glucoside structurally related to cyanogenic glucosides.
Tina eFrisch, Tina eFrisch, Mohammed Saddik Motawia, Mohammed Saddik Motawia, Mohammed Saddik Motawia, Carl Erik eOlsen, Carl Erik eOlsen, Carl Erik eOlsen, Niels eAgerbirk, Niels eAgerbirk, Birger Lindberg Møller, Birger Lindberg Møller, Birger Lindberg Møller, Birger Lindberg Møller, Nanna eBjarnholt, Nanna eBjarnholt, Nanna eBjarnholt   +16 more
doaj   +1 more source

Conspicuousness and toxicity of Coccinellidae: An aposematic review [PDF]

Arthropods, 2020
Coccinellids (commonly known as ladybirds) mostly exhibit bright clouration and play a vital role in biological control of pests of important crops such as aphids and scale insects.
Muhammad Aslam
doaj  

Brightly coloured tissues in limid bivalves chemically deter predators [PDF]

Royal Society Open Science, 2019
Members of the marine bivalve family Limidae are known for their bright appearance. In this study, their colourful tissues were examined as a defence mechanism towards predators.
Lindsey F. Dougherty, Alexandria K. Niebergall, Corey D. Broeckling, Kevin L. Schauer, Jingchun Li   +4 more
doaj   +1 more source

Experimental aerosol survival of SARS-CoV-2 in artificial saliva and tissue culture media at medium and high humidity

Emerging Microbes and Infections, 2020
SARS-CoV-2, the causative agent of the COVID-19 pandemic, may be transmitted via airborne droplets or contact with surfaces onto which droplets have deposited.
Sophie J. Smither, Lin S. Eastaugh, James S. Findlay, Mark S. Lever   +3 more
doaj   +1 more source

Toxicity and taste: unequal chemical defences in a mimicry ring [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2018
Mimicry of warning signals is common, and can be mutualistic when mimetic species harbour equal levels of defence (Müllerian), or parasitic when mimics are undefended but still gain protection from their resemblance to the model (Batesian). However, whether chemically defended mimics should be similar in terms of toxicity (i.e.
Anne E. Winters, Nerida G. Wilson, Cedric P. van den Berg, Martin J. How, John A. Endler, N. Justin Marshall, Andrew M. White, Mary J. Garson, Karen L. Cheney   +8 more
openaire   +5 more sources

Redescription of a weevil Paramecops sinaitus (Coleoptera: Curculionidae: Molytinae) from the Sinai and an ecological study of its interaction with the Sinai milkweed Asclepias sinaica (Gentianales: Asclepiadaceae)

European Journal of Entomology, 2007
We collected specimens of Paramecops sinaitus (Pic, 1930) (Curculionidae: Molytinae) from south Sinai in Egypt, which enabled us to make the first complete description of this species. We also include some taxonomic remarks on the genus.
Tim NEWBOLD, Massimo MEREGALLI, Enzo COLONNELLI, Maxwell BARCLAY, Shereen ELBANNA, Nancy ABU FANDUD, Frank FLEGG, Rasha FOUAD, Francis GILBERT, Vanessa HALL, Claire HANCOCK, Mona ISMAIL, Samr OSAMY, Isra'a SABER, Fayez SEMIDA, Samy ZALAT   +15 more
doaj   +1 more source

Dynamics of Dissolved and Particulate Polyunsaturated Aldehydes in Mesocosms Inoculated with Different Densities of the Diatom Skeletonema marinoi

Marine Drugs, 2011
A survey of the production of polyunsaturated aldehydes (PUA) of manipulated plankton communities is presented here. PUA are phytoplankton-derived metabolites that are proposed to play an important role in chemically mediated plankton interactions ...
Georg Pohnert, Charles Vidoudez, Jens Christian Nejstgaard, Hans Henrik Jakobsen   +3 more
doaj   +1 more source

Use of aliphatic thiols for on-site derivatization and gas chromatographic identification of Adamsite [PDF]

Journal of the Serbian Chemical Society, 2023
The report describes the development of methods for rapid and simple identification of Adamsite in mobile laboratory conditions using a field gas chromatograph coupled with mass spectrometer.
Rozsypal Tomas
doaj   +1 more source

Antimicrofouling activities of marine macroalga Dictyota dichotoma from the Red Sea

Journal of Agricultural and Marine Sciences, 2019
Introduction. Marine organisms produce a variety  of secondary metabolites mainly for achieving the defence against the competitors and predators. These compounds could be used as natural product antifoulants for the management of biofouling growth on ...
Alaa Aref Gadhi, Mohsen M. El-Sherbiny, Abdul Mohsin Al-Sofynai, Mohammad Abdulaziz Ba-Akdah, Sathianeson Satheesh   +4 more
doaj   +1 more source