3 Styles of flatter looking simple battery icons - showing charged, nearly empty and charging - PSD set 時尚 現代 創意 3 Ultra Simple Flat Battery Icons Set PSD
A ball-and-stick model structure of basic (positively-charged) amino acid lysine (Lys, K). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape 酸 氨基 氨基酸 賴氨酸 (氨基酸)
A ball-and-stick model structure of acidic (negatively-charged) amino acid aspartic acid (Asp, D). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape 酸 酸性 氨基 天冬氨酸 (氨基酸)
A ball-and-stick model structure of basic (positively-charged) amino acid histidine (His, H). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape 酸 氨基 氨基酸 組氨酸 (氨基酸)
A ball-and-stick model structure of basic (positively-charged) amino acid arginine (Arg, R). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape 酸 氨基 氨基酸 精氨酸 (氨基酸)