The Brazilian Genetic Heritage: Protect It or Use It Commercially?
The recent actions of the Brazilian Institute for the Environment and Renewable Natural Resources ‐ IBAMA, as part of the Operation New Directions (started in 2010), by notifying research institutions, pharmaceutical, cosmetic and agricultural companies, accused of biopiracy and investigated for presumed illegal collection of Brazilian biodiversity products, have led those segment companies to a standstill in that area.
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Two
new furanoflavonoids (5-hydroxy-2’’-isopropenyl-3-methoxyfurane-(2”,3”:7,8)-flavone
and 5-hydroxy-2’’-(1-hydroxy-1-methylethyl)-3-methoxyfurane-(2”,3”:7,8)-flavone)
together with twelve known flavonoids and one triterpene were isolated
from Lonchocarpus obtusos
Comparison
between GC-MS-SIM and GC-ECD for the Determination of Residues of
Organochlorine and Organophosphorus Pesticides in Brazilian Citrus
Essential Oils
Andréa A. R. Alves, Michelle J. C. Rezende, Ana M. C. Hovell,
Humberto R. Bizzo, Ana Carolina L. Oliveira, Silvana V. Rodrigues and
Claudia M. Rezende
J.
Braz. Chem. Soc.2012, 23, 306.
Two
gas chromatographic methods (gas chromatography-mass spectrometry in
selective ion monitoring mode (GC-MS-SIM) and gas chromatography-electron
capture detector (GC-ECD) were developed, validated and compared for
the determination of residues of organochlorine and organophosphoruspesticides
in Brazilian citrus essential oils (EOs). Solid phase extraction (SPE)
was used for pre-concentration of pesticides. The analysis of fifteen
Brazilian commercial EOs showed that 40% (six samples) presented contamination
above the allowed maximum residue limit (MRL)
Characterization
of Paracetamol Binding with Normal and Glycated Human Serum Albumin
Assayed by a New Electrochemical Method
Parandis Daneshegar, Ali Akbar Moosavi-Movahedi, Parviz Norouzi, Mohammad
Reza Ganjali,
Mohammad Farhadi and Nader Sheibani
J.
Braz. Chem. Soc.2012, 23, 315.
In the present study the interactions between
paracetamol (PC) and human serum albumin, in non-glycated (HSA) and
glycated form (GHSA), were investigated using continuous cyclic voltammetry
in acetate buffer pH 7.4. at the figure the cyclic voltamogram of
PC alone(a) after adding the protein has been shown (b,c)
A
Catalytic Kinetic Spectrophotometric Determination of Organophosphorus
Pesticides in Vegetable Samples
Neetu Tiwari and Anupama Asthana
J.
Braz. Chem. Soc.2012, 23, 322.
A
sensitive kinetic method based on catalytic effect of organophosphorus
pesticides malathion(A), dimethoate(B) and phorate(C)) on the oxidation
of LCV (leuco crystal violet) by potassium iodate in hydrochloric acid
medium to give a violet colored dye. The catalytic activity is mainly
exhibited by thiophosphoryl compounds and depends on the nature of the
P=S bond
Characterisation
of Electrodeposited and Heat-Treated Ni-Mo-P Coatings
Régis L. Melo, Paulo N. S. Casciano, Adriana N. Correia and Pedro
de Lima-Neto
J.
Braz. Chem. Soc.2012, 23, 328.
The
graphical abstract shows the influence of the P content on hardness
and on the corrosion resistance of the electrodeposited Ni-Mo-P. The
results show that the addition of P is beneficial for the hardness and
corrosion resistance properties of the Ni-Mo-based coatings and the
Ni78Mo10P12 sample presented the best hardness and corrosion-resistance
properties
Systematic
UPLC-ESI-MS/MS Study on the Occurrence of Staurosporine and Derivatives
in Associated Marine Microorganisms from Eudistoma vannamei
Márcio A. Andréo, Paula C. Jimenez, Josy B. C. N. Siebra,
Leticia V. Costa-Lotufo, Ricardo Vessecchi, Michael Niehues, João
L. C. Lopes and Norberto P. Lopes
J.
Braz. Chem. Soc.2012, 23, 335. cover
article
Marine
microorganisms from Eudistoma vannamei presenting Streptomyces
sp. able to generate staurosporine with significant cytotoxic activity
against human cancer lines
