TABLE 1.

Moderately thermophilic acidophilic bacteria used in the present study

Strain	Origin	Species	Reference(s)
ALV	Self-heating coal spoil heap, Alvecote, Warwickshire, United Kingdom	S. acidophilus	16
THWX	Self-heating coal spoil heap, Wrexham, Clywd, United Kingdom	S. acidophilus	5
YTF1	Frying Pan Hot Spring, Yellowstone National Park, Wyo.	S. acidophilus	5
TH1	Thermal spring, Iceland	S. thermosulfidooxidans	2a, 16
TH3	Copper leach dump, Kennecott Chino Mine, New Mexico	A. ferrooxidans	4, 14