def Lakshmi_Prasad(T, M):
return <NUM_LIT> - <NUM_LIT>*T + (<NUM_LIT> - <NUM_LIT>*T)*M**-<NUM_LIT:0.5><EOL>
r'''Estimates thermal conductivity of pure liquids as a function of
    temperature using a reference fluid approach. Low accuracy but quick.
    Developed using several organic fluids.

    .. math::
        \lambda = 0.0655-0.0005T + \frac{1.3855-0.00197T}{M^{0.5}}

    Parameters
    ----------
    T : float
        Temperature of the fluid [K]
    M : float
        Molecular weight of the fluid [g/mol]

    Returns
    -------
    kl : float
        Estimated liquid thermal conductivity [W/m/k]

    Notes
    -----
    This equation returns negative numbers at high T sometimes.
    This equation is one of those implemented by DDBST.
    If this results in a negative thermal conductivity, no value is returned.

    Examples
    --------
    >>> Lakshmi_Prasad(273.15, 100)
    0.013664450000000009

    References
    ----------
    .. [1] Lakshmi, D. S., and D. H. L. Prasad. "A Rapid Estimation Method for
       Thermal Conductivity of Pure Liquids." The Chemical Engineering Journal
       48, no. 3 (April 1992): 211-14. doi:10.1016/0300-9467(92)80037-B