Chemistry of ice surfaces. Elementary reaction steps on ice studied by reactive ion scattering
Article Abstract:
A study was conducted to describe reactions on ice surfaces with the emphasis on the mechanistic features of elementary reaction steps. C(sub s(super +)) reactive ion scattering and low energy sputtering techniques monitor the reactions by finding the molecules and ions on the ice surface. Ice surface reactions exhibit unique behaviors due to a kinetic constraints, resulting in the isolation of reaction intermediates, preferential stabilization of charged species, and diversity of reaction products.
Publication Name: Accounts of Chemical Research
Subject: Science and technology
ISSN: 0001-4842
Year: 2005
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Light and singlet oxygen in plant defense against pathogens: Phototoxic phenalenone phytoalexins
Article Abstract:
Plants defend themselves from pathogen infections or mechanical injury by the induced biosynthesis of phenalenone derivatives called phytoalexins which represent a very economical way to counteract hazard. The occurrence of phenalenone chromophores in phytoalexins suggests that these plants respond to pathogen attacks by biosynthesizing singlet oxygen photosensitizes able to use solar energy for defense.
Publication Name: Accounts of Chemical Research
Subject: Science and technology
ISSN: 0001-4842
Year: 2006
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The phomactins: A novel group or terpenoid platelet activating factor antagonists related biogenetically to the taxanes
Article Abstract:
A short description on the structurally rare phomactin family of platelet activating factor antagonists found in the marine fungus Phoma sp. is described. The phomactins reveal an interesting structural and biosynthetic relationship with the taxane group of compounds which is also discussed along with biogenetic interactions between members of this family of secondary metabolites.
Publication Name: Accounts of Chemical Research
Subject: Science and technology
ISSN: 0001-4842
Year: 2006
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