When chlorophyll is in the presence of acidic molecules (compounds that easily share their hydrogen atom), the magnesium is dislodged and replaced by hydrogen atoms. This simple structural change alters the colour of chlorophyll from light green to yellowish green. -hope this helps!
Originally commissioned by the Opera del Duomo for the Cathedral of Florence, it was meant to be one of a series of large statues to be positioned in the niches of the cathedral's tribunes, way up at about 80mt from the ground. David was originally commissioned as one of a series of statues of prophets to be positioned along the roofline of the east end of Florence Cathedral, but was instead placed in a public square, outside the Palazzo Vecchio, the seat of civic government in Florence, in the Piazza della Signoria, where it was unveiled on. Hope this helps!
1922 sao paulo modern art week festival ommitted ?
