Specifications table

Subject area	Process Chemistry and Technology
More specific subject area	Extraction of bioactive compounds from vegetable matrix. Agro industrial waste valorization.
Type of data	Figures and Table
How data was acquired	Juglone concentration was obtained by high-performance liquid chromatography (HPLC, Perkin Elmer 200 series) using a photo diode array (PDA) detector. Concentration of extracts was carried out by Rotavapor, Speed Vacuum, and Vaccum Oven equipments.
Data format	Raw Analyzed data
Experimental factors	The factors taken into account to generate the data of thermal stability were: extraction solvent, temperature, and time. In the case of concentration yield of juglone, the main factor was the concentration technology.
Experimental features	Data of thermal stability were obtained at four different temperatures (20°C, 40°C, 60°C and 70°C) during 8 hours every 1 h. Both, the juglone standard and natural extract (from walnut green husk) containing juglone were obtained in ethanol or methanol before to make the thermal stability test. The temperature to probe the concentration technologies was 40°C using ethanol or methanol and three concentration technologies (Rotavapor, Speed Vacuum, and Vaccum Oven equipments).
Data source location	The walnut green husk used for the study, were obtained 170 days after flowering, from a walnut plantation in the Libertador General Bernardo O'Higgins Region (33°56′00″S 71°50′00″W; Chile).
Data accessibility	Data are with this article.
Related research article	Soto-Maldonado, C., Vergara-Castro, M., Jara-Quezada, J., Caballero-Valdés, E., Müller-Pavez, A., Zúñiga-Hansen, M.E., Altamirano, C. 2019. Polyphenolic extracts of walnut (Juglans regia) green husk containing juglone inhibit the growth of HL-60 cells and induce apoptosis. Electronic Journal of Biotechnology, 39: 1–7.