--- trunk/OOPSE/forceFields/DUFF.frc	2003/06/23 21:24:03	563
+++ trunk/OOPSE/forceFields/DUFF.frc	2003/06/24 19:57:54	564
@@ -19,7 +19,7 @@ TE3		0		0	65.0		0.185				8.0
 TE3		0		0	65.0		0.185				8.0
 
 #BondTypes
-!Atom1	Atom2	type		distance
+!Atom1	Atom2	type		distance	k0 (kcal/mol)
 
 HEAD	CH3	fixed		2.75
 HEAD	CH2	fixed		2.75
@@ -27,12 +27,12 @@ CH3	CH3	fixed		1.54
 HEAD    TB1	fixed		2.76
 HEAD	TB2	fixed		3.20
 HEAD	TB3	fixed		3.63
-CH3	CH3	fixed		1.54
-CH3	CH2	fixed		1.54
-CH3	CH	fixed		1.54
-CH2	CH2	fixed		1.54
-CH2	CH	fixed		1.54
-CH	CH	fixed		1.54
+CH3	CH3	harmonic	1.526		260
+CH3	CH2	harmonic	1.526		260
+CH3	CH	harmonic	1.526		260
+CH2	CH2	harmonic	1.526		260
+CH2	CH	harmonic	1.526		260	
+CH	CH	harmonic	1.526		260
 TB1	TB1	fixed		1.56
 TB2	TB2	fixed		2.34
 TB3	TB3	fixed		3.12