Utilização Da Classificação Não- Supervisionada Na Integração E Interpretação De Dados Geofísicos Em Cuba Centro-oriental

This paper presents results from unsupervised classification of magnetic (airborne), gravimetric and gamma-ray spectrometric (airborne) data in central-eastern Cuba, with the objective of assisting regional geologic and tectonic-structural interpretation in the area. This portion of Cuba comprises broad sectors of key geologic units recognized in the island, including the Cretaceous volcanic arc (CVA), the Mesozoic ophiolites, the margin of the Bahamas continental platform (Upper Jurassic-Upper Cretaceous) and the Cenozoic cover. The area's unique geological characteristic makes it an excellent 'laboratory' to use and evaluate potential field data and multivariate statistic methods. The study revealed that geophysical classes yielded through these methods correlate well with several geologic formations and tectonic features found in the area.203151161Baranov, V., A new method for interpretation of aeromagnetic maps: Pseudogravitmetric anomalies (1957) Geophysics, 22, pp. 359-383. , S.ICrósta, A., (1993) Processamento Digital de Imagens de Sensoriamento Remoto, , Campinas: Instituto de Geociências da UnicampDavis, C.D., (1976) Statistics and Data Analysis in Geology Analysis of Multivariate Data, , New York: John Wiley & SonsDickson, B.L., Scott, K.M., Interpretation of aerial gamma-ray survey adding the geochemical factor (1997) AGSO Journal of Australian Geology & Geophysics, 17, pp. 187-200. , S.IDuval, J.S., Vulkan, N.U., Multivariate statistical analysis of geophysical data in Nevada (1993) Geophysics, 58, pp. 749-755. , S.IGrant, F.S., Aeromagnetic, geology and ore environments (1985) Geoexploration, 23, pp. 303-362. , S.IEberle, D., Geological mapping based upon multivariate statistical analysis of airborne geophysical data (1993) ITC Journal, (2), pp. 173-178. , S.IHarris, J.R., Clustering of gamma ray spectrometer data using a computer image analysis system Statistical Application in the Earth Sciences, 1989, pp. 19-31. , AGTERBERG F. P.BONHAM-CARTER, G. F. (Ed.). Geological Survey of CanadaIturralde-Vinent, M.A., Introducción a la Geología de Cuba Estudios Sobre la Geología de Cuba, 1997, pp. 35-68. , FURRAZOLA BERMÚDEZ, G.NÚÑEZ CAMBRA, K. Ciudad de la Habana: Instituto de Geología y PaleontologíaGeology of the Camaguey Region, Central Cuba Evolution of a Collisional margin in the Northern Caribbean Zeitschrift für Angewandte Geologie, 2000, pp. 267-273. , MILLER H.HERVÉ F. (Ed.). Geoscientific Cooperation with Latin America-31 st International Geological Congress, Rio de JaneiroKerr, A.C., A new plate tectonic model of the Caribbean: Implications from a geochemical reconnaissance of Cuban Mesozoic volcanic rocks (1999) Geological Society of American Bulletin, 111 (1), pp. 581-1599. , S.IMarí, T.M., Particularidades de los granitoides de Ciego de Avila-Camaguey-Las Tunas y consideraciones sobre su posición dentro del Arco de Islas (1997) Estudios Sobre la Geología e Cuba, pp. 399-416. , FURRAZOLA BERMÚDEZ, G.NÚÑEZ CAMBRA, K. Ciudad de la Habana: Instituto de Geología y PaleontologíaMirónov, V.S., (1977) Curso de Prospección Gravimétrica, , Barcelona: ReverteParks, J.M., Cluster analysis applied to multivariate geological problems (1966) Journal of Geology, 74, pp. 703-715. , S.IPérez, R.M., Sukar, S.K., Granitoides del Arco Volcánico Cretácico de la Región Central de Cuba (antigua provincia de Camaguey) (1997) Estudios Sobre la Geología e Cuba, pp. 387-398. , FURRAZOLA BERMÚDEZ, G.NÚÑEZ CAMBRA, K. Ciudad de la Habana: Instituto de Geología y PaleontologíaPiñero, P.E., Quintana, M.E., Marí, M.T., Caracterización geológica de los depósitos vulcanógeno-sedimentarios de la región de Ciego-Camaguey-Las Tunas (1997) Estudios Sobre la Geología e Cuba, pp. 345-356. , FURRAZOLA BERMÚDEZ, G.NÚÑEZ CAMBRA, K. Ciudad de la Habana: Instituto de Geología y PaleontologíaPires, A.C.B., Statistical characterization of greenstone sequences using magnetic and gamma-ray spectrometric data (1990) Revista Brasileira de Geociências, 20, pp. 293-298. , Guarinos-Pilar de Goiás, Brazil. S.IPires, A.C.B., Harthill, N., Statistical analysis of airborne gamma-ray mapping purposes: Crixás-Itapaci area (1989) Geophysics, 54, pp. 10-15. , Brazil. S.IPirkle, F.L., An example of cluster analysis applied to a large geological data set: Aerial radiometric data from Cooper Mountain, Wyoming (1984) Mathematical Geology, 16, pp. 479-498. , S.IPuscharovsky, Y., (1988) Mapa Geológico de la República de Cuba, p. 40. , S.I. : Academias de Ciencias de Cuba y la Unión Soviética, Escala 1:250.00

Antimicrobial activity and mineral composition of shiitake mushrooms cultivated on agricultural waste

The antimicrobial activity and mineral composition of shiitake mushrooms were evaluated in four isolates of Lentinula edodes. Mushrooms were cultivated on artificial logs, based on eucalyptus sawdust enriched with 20% rice, wheat, or soybean bran, or combination of 10% of two of these supplements. The substrates were humidified with a 0.1% mate tea extract or water. Logs of Eucalyptus grandis were also used to cultivate the shiitake mushrooms. The antimicrobial activity of an aqueous extract, corresponding to 40 mg of mushroom dry matter, was in some cases, depending on the isolate, able to inhibit both Bacillus subtilis and Escherichia coli K-12, independent of substrate composition or the growth stage of the mushrooms. Nitrogen, phosphorus, potassium, magnesium and calcium concentrations varied according to the substrate on which the mushrooms were cultivated, being, generally, higher with cultivation on artificial rather than natural eucalyptus logs. It could be concluded that, in addition to the fungal isolate, substrate composition and, processing methods must be considered during the production of antimicrobial substance(s) as well as in the mushroom nutritional composition