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The radius of gyration of crotamine is determined by the small angle x-ray scattering technique. Several molecular solutions have been studied to correct for concentration effects. The apparent molecular radius of gyration is also determined as a function of pH. An important change between pH 9.5 and 12.5 is attributed to a dominant effect of molecular(More)
The three-dimensional structure of the highly toxic crotoxin from Crotalus durissus terrificus was modelled based on sequence analysis and the refined structure of calcium-free phospholipase of Crotalus atrox venom. Small-angle x-ray scattering experiments were performed on aqueous solutions of crotoxin. The radial distribution function derived from these(More)
alpha-crotamine is a small toxic protein (42 amino acid residues with three disulphide bridges) present in the venom of Crotallus durissus terrificus. Molecular parameters (Rg = 13.7 A, S = 3,000 A2, V = 9,200 A3 and Dmax = 40 A) were derived from SAXS curves obtained from a solution of this protein at pH = 4.5. An excellent agreement between the(More)
In this paper a new algorithm to compute an additive synthesis model of a signal is presented. An analysis based on the Continuous Wavelet Transform (CWT) has been used to extract the time-varying amplitudes and phases of the model. A coarse to fine analysis increases the algorithm efficiency. The computation of the transient analysis is performed using the(More)
In this paper, we present the implementation of different reverberation algorithms in the Matlab programming environment. This is a useful tool to analyze the algorithms behavior from the signal processing and sounding point of view. With Matlab environment is possible and simple to view the filter characteristics, impulse response, phase response and all(More)
In this work, a new estimator of the fundamental frequencies (F0) present in a polyphonic single-channel signal is developed. The signal is modeled in terms of a set of discrete partials obtained by the Complex Continuous Wavelet Transform (CCWT). The fundamental frequency estimation is based on the energy distribution of the detected partials of the input(More)
α-crotamine is a small toxic protein (42 amino acid residues with three disulphide bridges) present in the venom of Crotallus durissus terrificus. Molecular parameters (R g=13.7 Å, S=3,000 Å2, V=9,200 Å3 and D max=40 Å) were derived from SAXS curves obtained from a solution of this protein at pH=4.5. An excellent agreement between the experimental distance(More)
This paper describes a highly versatile, low-cost reverberation system comprising two main elements: a computer for building and editing the desired reverberation effect impulse response, and a commercial DSP-based board, to run the algorithm in real-time, allowing the evaluation of the results. The main parameters of the reverberation algorithm can be(More)
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