diff --git a/src/Chemistry/Bonds/Implements/BaseBond.cs b/src/Chemistry/Bonds/Implements/BaseBond.cs
index aa34878..11a1d50 100644
--- a/src/Chemistry/Bonds/Implements/BaseBond.cs
+++ b/src/Chemistry/Bonds/Implements/BaseBond.cs
@@ -148,7 +148,17 @@ public abstract class BaseBond
     /// </summary>
     public CacheItem<LieSU3> LogState { get; }
 
-
+    public bool DisconnectCondition
+    {
+        get
+        {
+            SU3 x = Compound.HomogeneousMixture.StateMatrix.Get * StateMatrix.Get.Hermitian();
+            DiagR3 w = new DiagR3(-Math.PI, 1, Math.E);
+            double y = x.ConjugateOn(w).Rayleigh((x + LogKernel.Get).ColumnAverageBivariant);
+            double z = StateMatrix.Get.ConjugateOn(w).Rayleigh(LogKernel.Get.ColumnAverageBivariant);
+            return y > z;
+        }
+    }
 
 
     /// <summary>
diff --git a/src/Chemistry/Mixtures/Implements/HeterogeneousMixture.cs b/src/Chemistry/Mixtures/Implements/HeterogeneousMixture.cs
index 90eb146..23e49d1 100644
--- a/src/Chemistry/Mixtures/Implements/HeterogeneousMixture.cs
+++ b/src/Chemistry/Mixtures/Implements/HeterogeneousMixture.cs
@@ -155,7 +155,7 @@ public class HeterogeneousMixture
         }
     }
 
-    public void RemoveTop()
+    public void RemoveBottom()
     {
         if (Layers.Count == 0)
             return;
@@ -164,7 +164,7 @@ public class HeterogeneousMixture
         
     }
 
-    public void RemoveBottom()
+    public void RemoveTop()
     {
         if (Layers.Count == 0)
             return;
diff --git a/src/Chemistry/Mixtures/Implements/HomogeneousMixture.cs b/src/Chemistry/Mixtures/Implements/HomogeneousMixture.cs
index 3bfea10..1d7b8d2 100644
--- a/src/Chemistry/Mixtures/Implements/HomogeneousMixture.cs
+++ b/src/Chemistry/Mixtures/Implements/HomogeneousMixture.cs
@@ -88,11 +88,6 @@ public class HomogeneousMixture
 
             foreach (BaseBond b in c.Bonds)
             {
-                if (b.Compound.Amount.IsEqualApprox(0))
-                    throw new Exception("P??");
-
-                if (b.Compound != c)
-                    throw new Exception("??!!?");
                 if (
                     b.Connected &&
                     b.Energy > b.AntiBondingEnergy &&
@@ -388,29 +383,7 @@ public class HomogeneousMixture
     /// </summary>
     public double Ratio =>
         Amount / (HeterogeneousMixture == HeterogeneousMixture.Null ? Amount : HeterogeneousMixture.Amount);
-
     
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="homo"></param>
-    public void Resolve(HomogeneousMixture homo)
-    {
-        foreach (Compound c in homo.Compounds)
-            Resolve(c, false);
-        ResetAllCache();
-        
-    }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="compound"></param>
-    /// <param name="resetCache"></param>
-    public void Resolve(Compound compound, bool resetCache = true)
-    {
-        AddCompound(compound, resetCache);
-    }
     
     /// <summary>
     /// density of the mixture, amount of molecular per volume
@@ -504,16 +477,12 @@ public class HomogeneousMixture
             Compound oth = xb2.Compound.Split(amountDiff);
             xb2.HomogeneousMixture.AddCompound(oth);
         }
-
-        string log = $"From Composite React of {xb1.Compound.Amount}*{xb1.Compound.Expression} and {xb2.Compound.Amount}*{xb2.Compound.Expression}";
-        
         xb1.Connect(xb2);
-        xb1.Compound.TraceLog.Add(log);
     }
 
     private int ReactionType()
     {
-        Complex d = LogStateMatrix.Get.CayleyPositive().Det();
+        Complex d = StateMatrix.Get.Trace();
         return d.Phase switch
         {
             > 7 * Math.PI / 4 or < Math.PI / 4 => 0,
@@ -535,7 +504,9 @@ public class HomogeneousMixture
                 continue;
             if (
                 bond.Energy > bond.AntiBondingEnergy &&
-                bond.ConnectedBond.Energy > bond.ConnectedBond.AntiBondingEnergy
+                bond.ConnectedBond.Energy > bond.ConnectedBond.AntiBondingEnergy &&
+                bond.DisconnectCondition &&
+                bond.ConnectedBond.DisconnectCondition
             )
             {
                 bond.Disconnect();
@@ -704,7 +675,6 @@ public class HomogeneousMixture
                 toAbsorb.Add((c, c.Amount));
                 continue;
             }
-
             double maxResAmount = Amount;
             foreach (Compound ct in Compounds)
                 if (ct.IsometricTo(c))
@@ -716,8 +686,6 @@ public class HomogeneousMixture
             if(splitAmount.IsEqualApprox(0))
                 continue;
             toAbsorb.Add((c, splitAmount));
-            //Compound cSplit = c.Split(splitAmount);
-            //toAbsorb.Add(cSplit);
         }
         foreach ((Compound c, double a) in toAbsorb)
         {
@@ -841,11 +809,4 @@ public class HomogeneousMixture
         }
     }
 
-    public static void Test()
-    {
-        Func<double, double> a = x => -Math.Tan((Math.PI * x - Math.PI) / 2);
-        Console.WriteLine(a(0));
-        Console.WriteLine(a(-1));
-        Console.WriteLine(a(1));
-    }
 }