Can synthetic properties be used in OQL (Object Query Language)?

   The table has columns ActualStartTime, AdjustedStartTime, ActualFinishTime and AdjustedFinishTime.

We added properties JobStartTime and JobFinishTime to the table entity (see the following code).

Can JobStartTime and JobFinishTime be used in OQL?
If not, can we write an OQL based on database that provide the same results?

     ''' -----------------------------------------------------------------------------
    ''' <summary>
    ''' JobStartTime, ActualStartTime otherwise AdjustedStartTime if actual not available
    ''' </summary>
    ''' ----------------------------------------------------------------------------
    Public ReadOnly Property JobStartTime() As Date
        Get
            Dim aJobStartTime As Date
            Try
                If Me.ActualStartTime.HasValue Then
                    aJobStartTime = Me.ActualStartTime.Value
                Else
                    aJobStartTime = Me.AdjustedStartTime.Value
                End If
            Catch
                aJobStartTime = Nothing
            End Try
            Return (aJobStartTime)
        End Get
    End Property

    ''' -----------------------------------------------------------------------------
    ''' <summary>
    ''' JobFinishTime, ActualFinishTime otherwise AdjustedFinishTime if actual not available
    ''' </summary>
    ''' ----------------------------------------------------------------------------
    Public ReadOnly Property JobFinishTime() As Date
        Get
            Dim aJobFinishTime As Date
            Try
                If Me.ActualFinishTime.HasValue Then
                    aJobFinishTime = Me.ActualFinishTime.Value
                Else
                    aJobFinishTime = Me.AdjustedFinishTime.Value
                End If
            Catch
                aJobFinishTime = Nothing
            End Try
            Return (aJobFinishTime)
        End Get
    End Property