Isolantion and biological activities of secondary metabolites from the sponges monanchora aff. arbuscula, aplysina sp. petromica ciocalyptoides and topsentia ophiraphidies, from the ascidian didemnum ligulum and from the octocoral carijoa riisei
摘要：
The investigation of extracts from six species of marine invertebrates yielded one new and several k...
doi：
10.1590/S0100-40422007000500027
作 者：
Moraes, Manoel O.;Ko...
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Química Nova
Determination of zinc in soil using colorimetry
摘要：
In terms of soil fertility, zinc is a micronutrient that is very important in the culture of soy, ma...
doi：
10.1590/S0100-40422007000300016
作 者：
Rezende, Maria Olímp...
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Química Nova
Supramolecular approach to nanotechnology
摘要：
Brazilian science is evolving rapidly and steadly in the last 10 years, reaching the 15脗潞 place in t...
doi：
10.1590/S0100-40422007000600018
作 者：
Araki, Koiti
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Química Nova
1,5-Asymmetric induction in the boron-mediated aldol reaction of beta-oxygenated methyl ketones
摘要：
High levels of substrate-based 1,5-stereoinduction are obtained in the boron-mediated aldol reaction...
doi：
10.1590/S0100-40422007000800036
作 者：
Aguilar, Andrea M.;U...
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Química Nova
70th anniversary of biodiesel in 2007: historical evolution and current situation in Brazil
摘要：
Periodically, during petroleum shortages, vegetable oils and their derivatives have been proposed as...
doi：
10.1590/S0100-40422007000800046
作 者：
Suarez, Paulo A. Z.;...
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Química Nova
Occurrence and biological activity of quassinoids in the last decade
摘要：
Quassinoids, the bitter principles of the Simaroubaceae family, are a group of structurally complex ...
doi：
10.1590/S0100-40422007000400033
作 者：
Braz-Filho, Raimundo...
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Química Nova
Urinary 2,5-hexanedione in workers exposed to n-hexane: influence of the sample treatment
摘要：
The aim of the present study was to determine 2,5-hexanedione (2,5-HD), a metabolite of n-hexane, by...
doi：
10.1590/S0100-40422007000400009
作 者：
Siqueira, Maria Elis...
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Química Nova
Mercury emissions to the atmosphere from natural gas burning in Brazil
摘要：
Increasing natural gas use in Brazil triggered a discussion of its role as a Hg source. We show that...
doi：
10.1590/S0100-40422007000200024
作 者：
Marins, Rozane Valen...
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Química Nova
Chemical composition and evaluation of allelopathic potentials of Adiantum tetraphyllum Humb. & Bonpl. Ex. Willd (Pteridaceae)
摘要：
Chemical studies of green leaves of A. tetraphyllum afforded b-sitosterol, a mixture containing the ...
doi：
10.1590/S0100-40422007000200010
作 者：
Tiviroli, Soraia C.;...
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Química Nova
Recent advances in the preparation of aziridines and their application in organic synthesis
摘要：
This article surveys a selection of the most recent advances in aziridine synthesis. Novel synthetic...
doi：
10.1590/S0100-40422007000100022
作 者：
Sá, Marcus Mandolesi...
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Química Nova
