Brazil analysis

Deposits of niobium-tantalum ores are found in Australia, Brazil, Canada, China, Malaysia, Namibia, Nigeria, Russia, Rwanda, Spain, Thailand, Zaire, and Zimbabwe. A more detailed analysis of worldwide tantalum mineral raw material supply can be found in Linden s comprehensive overview [22,23]. 

Haliclonacyclamine E (13) and arenosclerins A (14), B (15), and C (16) have been isolated from the marine sponge Arenosclera brasiliensis, endemic in Brazil. Crude extracts of this sponge displayed potent cytotoxic and antibiotic activities, and were subjected to fractionation by sihca-gel flash chromatography, medium pressure chromatography on a SiOH cyanopropyl-bonded column, and reversed-phase Cis column chromatography to give compounds 13-16 [18]. The structure elucidation was based on spectroscopic analysis, including HRFABMS, COSY, HSQC, HSQC-TOCSY, and HMBC NMR... 

Barth, O. M. (2005). Botanical resources used by Apis mellifera determined by pollen analysis of royal jelly in Minas Gerais. Brazil. ]. Apicult. Res. 44, 78-81. 

Kuster M, Azevedo DA, Lopez de Alda MJ, Aquino Neto FR, Barcelo D (2009) Analysis of phytoestrogens, progestagens and estrogens in environmental waters from Rio de Janeiro (Brazil). Environ Int 35(7) 997-1003... 

As an example of modeling a fluid in redox disequilibrium, we use an analysis, slightly simplified from Nordstrom et al. (1992), of a groundwater sampled near the Morro do Ferro ore district in Brazil (Table 7.2). There are three measures of oxidation state in the analysis the Eh value determined by platinum electrode, the dissolved oxygen content, and the distribution of iron between ferrous and ferric species. 

Table 7.2. Chemical analysis of a groundwater from near the Morro do Ferro deposits, Brazil (Nordstrom et al., 1992)...

The gross structure of 73 was determined by a combination of spectroscopic and chemical means (112) stereochemistry was proved by single-crystal X-ray diffraction (113). Much later, 73 was also found in C. guianensis from Brazil (114). It was characterized by PMR and CMR data as well as by X-ray analysis. Gerrardine showed activity against Salmonella spp. (115), Candida albicans T.A., Escherichia coli, and Klebsiella pneumoniae D.T. (114). 

Linsalata et al. (1985) also estimated that the intake of thorium by populations residing in these parts of Brazil was 6-10 times higher than the population in New York City, as indicated by the analysis of human bones from the two areas. The concentration of thorium in human bones was found to be 100 times higher in high background monazite areas in India than in areas with normal thorium concentration in soils (Pillai and Matkar 1987). 

Laboratory of Analysis Chemical - Biological (LAQB), Foundation of State University Center West Zone (UEZO), Brazil... 

Analysis of the regional distribution of cocaine use in Brazil shows that the South-East and the South are most heavily affected while use in the North-East and North is more moderate. 

Hamilton, J. G. C., Brazil, R. R, Morgan, E. D. and Alexander, B. (1999a). Chemical analysis of oxygenated homosesquiterpenes a putative sex pheromone from Lutzomyia lichyi (Diptera Psychodidae). Bulletin of Entomological Research 89 139-145. 

G. Liljegren et al., Case-control Study on Breast Cancer and Adipose Tissue Concentrations of Congener Specific Polychlorinated Biphenyls, DDE and Hexachlorobenzene, Eur. J. Cancer Prev. 7 (1998) 155-40 R. J. Helzlsouer et al., Serum Concentrations of Organochlorine Compounds and the Subsequent Development of Breast Cancer, Cancer Epidemiol. Biomarkers. Prev. 8 (1999) 525-52 J. F. Dorgan, Serum Organochlorine Pesticides and PCBs and Breast Cancer Risk Results from a Prospective Analysis, Cancer Causes and Control 10 (1999) 1-11 G. A. S. Mendonca et al., Organochlorines and Breast Cancer a Case-control Study in Brazil, Int. 

In addition, a total of 146 sheep urine and 87 chicken muscle samples from birds sold in local markets and originating from Brazil, Denmark, France, and Turkey were tested for residues of diethylstilbestrol and ethinylestradiol (41). Although some of the samples were positive to both analytes by an immunochemical screening assay, confirmatory analysis by GC-mass spectroscopy (MS) showed that none of the samples contained residues of the examined steroids. 

Acknowledgments. Thanks are due to S.E. Sugamori for technical assistance and to H. Sgguin for elemental analysis. One of us (J.C.N.F.) would like to thank CNPq (Brazil) and NSERC (Canada) for support. 

FIGURE 4.16 Canonical analysis score plot performed considering 66 dried meat samples coming from different countries (CH, Switzerland BR, Brazil CA, Canada US, USA AU, Australia). (From Shintu ef ai, 2007.)... 

Sinusoidal voltammetry (SV) is an EC detection technique that is very similar to fast-scan cyclic voltammetry, differing only in the use of a large-amplitude sine wave as the excitation waveform and analysis performed in the frequency domain. Selectivity is then improved by using not only the applied potential window but also the frequency spectrum generated [28]. Brazill s group has performed a comparison between both constant potential amperometry and sinusoidal voltammetry [98]. 

N.R. Hebert and S.A. Brazill, Microchip capillary gel electrophoresis with electrochemical detection for the analysis of known SNPs, Lab Chip, 3 (2003) 241-247. 

In a study of the fluorescence properties of the Brazil Block seam (Parke Co., IN), a somewhat different approach was used. In this case, about a hundred individual spectra were taken on a variety of fluorescing liptinite macerals. Although the macerals from which the spectra were tkane were not identified at the time of measurement, photomicrographs in both normal white-light and fluorescent light were taken for documentation. The spectral parameters for each spectrum were calculated and these data were subjected to cluster analysis to test the degree to which the... 

The above analysis assumes cost of electricity is US 30/MWh, which is the average industrial electricity rate in Brazil. 

Similar analysis can be made regarding the protection of the coffee plant and fruit. Here the activity of Difolatan plus its resistance to hydrolysis and greater persistence provides the more ideal combination of properties. Therefore, under the tropical, moist conditions of Kenya, Brazil, Central America and South India, particularly for Colletrichium infections, Phaltan and captan are mediocre and Difolatan is excellent. Incidentally, none of these compounds are systemic and the residue is entirely on the fruit, not on the bean. 

Se Speciation in Plants The presence of a number of volatile Se species was reported in edible allium plants such as garlic by GC-AES [79]. Selenomethionine, Se-methylselenocysteine, and y-glutamyl-Se-methyl-L-seleno cysteine were identibed in garlic and onion by HPLC-ICP-MS and ES-MS/MS [80]. Selenomethionine is the primary species found in all types of nuts (19D25 percent of the total Se) [30], sunBower [81], and mushrooms [36, 37], The distribution of Se among different fractions (lipid extract, low molecular weight, and protein fractions) of nuts and speciation analysis was studied [30]. Selenium was not detected in any of the lipid extracts obtained from the different types of nuts [30], Results obtained for Brazil nuts by SEC with on-line ICP-MS detection showed that approximately 12 percent of total Se was weakly bound to proteins [30],... 

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