Volume 2 Issue 1

Volume 2 Issue 1

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Mini Review 

The Brazilian Agricultural Revolution in the XXI Century-Changing Paradigms in Biotechnology

Luiz A. B. de Castro*, PhD, Francisco J. L. Aragão, PhD

The late Norman Borlaug visited Brazil some years before he passed away and said in a press release: “the next revolution in agriculture will happen in Brazil”. Brazil  multiplied its food production by four within fifty years. More important, this was done without substantial increase in acreage. Plant breeding, performed by a dozen of good geneticists, has continuously built cultivars to feed our seed industry. High-tech seeds and low-tech farming practices resulted in Brazil from seed laws and plant breeders. Agriculture in Brazil is competitive because it is cheap for the farmer.

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Research Article 

Very High Frequency Bone Conduction Transducer for Audiometric Testing

Martin L. Lenhardt*

A prototype piezo ceramic transducer is described which will address the need in hearing testing for a compact, light weight device that will allow measurement of hearing thresholds in the 10-20 kHz range by bone or fluid conduction. This transducer will permit comparisons with well-established high frequency air conduction procedures.

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