Figure 1. FTIR-ATR spectrogram for cannabis S. oil samples extracted with ultrasound (short, dotted line), microwaves (short, dashed line), and the process combining ultrasound with microwave (mixed with straight line).

From

Comparison of Cannabis Flower Oil Extract from Microwave, Ultrasound, and Combined Processes: Yield, Cannabinoids Content, and Analgesic Effect in Situ

Alfonso Topete-Betancourt, Luis E. Sámano Muñoz, Héctor E. Martínez-Flores, Osvaldo Álvarez-Cortés, Jose J. Virgen Ortiz, M.G. Garnica-Romo, Luis F. Ortega-Varela, Rosa M. García-Martínez

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