TABLE 2.

Compounds used as electron donors by HS-oxidizing isolates with nitrate (10 mM) as the electron acceptor

Electron donor	Concn	Use by isolate:
		JJ	KC	HA	NMX	PB	SBS
Hydrogen	101 kPa	+	+	−	+	−	−
Formate	10 mM	−	−	+	−	+	−
Acetate	10 mM	+	+	+	+	+	+
Propionate	5 mM	+	−	+	+	+	+
Butyrate	5 mM	+	−	+	+	+	+
Palmitate	1 mM	−	+	−	−	+
Ethanol	10 mM	+	+	+	+	+	+
Fumarate	10 mM	+	+	+	+	+	+
Lactate	10 mM	+	+	+	+	+	+
Citrate	10 mM	+	−	+	−	+	+
Pyruvate	10 mM	+	+	+	+	+
Malate	10 mM	+	−	+	−	−	−
Succinate	10 mM	+	+	+	−	+	+
Glucose	10 mM	−	+	+	+	+	−
Casamino Acids	1 g/liter	+	+	+	+	+	+
Yeast extract	1 g/liter	−	+	−	−	+	+