Fig. 5From: Effect of extraction on the acoustic vibrational properties of Picea jezoensis var. microsperma (Lindl.) W.C.Cheng & L.K.FuScanning electron micrograph of untreated and extracted sample. A, B, C, D: treatment with deionized water, dichloromethane, benzyl alcohol, and ethanol, respectively; a, b, c, d: UntreatedBack to article page