Location: semantic-annotation @ 92367a08b2bb / SEDML / weinstein_1995_7B.cellml

Author:
Dewan Sarwar <dsar941@UoA.auckland.ac.nz>
Date:
2020-06-25 21:17:52+12:00
Desc:
annotations changed for mackenzie model
Permanent Source URI:
https://staging.physiomeproject.org/workspace/267/rawfile/92367a08b2bb9612257ef3f32b6823adf5e0d53b/SEDML/weinstein_1995_7B.cellml

<?xml version='1.0' encoding='UTF-8'?>
<!--
This CellML file was generated on 23/03/2009 at 10:26:53 at a.m. using:

COR (0.9.31.1197)
Copyright 2002-2009 Dr Alan Garny
http://COR.physiol.ox.ac.uk/ - COR@physiol.ox.ac.uk

CellML 1.0 was used to generate this model
http://www.CellML.org/
-->
<model cmeta:id="Proximal_Tubule_NHE3" name="Proximal_Tubule_NHE3" xmlns="http://www.cellml.org/cellml/1.0#" xmlns:cellml="http://www.cellml.org/cellml/1.0#" xmlns:cmeta="http://www.cellml.org/metadata/1.0#">
    <units name="mmol">
        <unit prefix="milli" units="mole"/>
    </units>
    <units name="umol">
        <unit prefix="micro" units="mole"/>
    </units>
    <units name="nmol">
        <unit prefix="nano" units="mole"/>
    </units>
    <units name="mM">
        <unit prefix="milli" units="mole"/>
        <unit exponent="-1" units="litre"/>
    </units>
    <units name="M">
        <unit units="mole"/>
        <unit exponent="-1" units="litre"/>
    </units>
    <units name="cm">
        <unit prefix="centi" units="metre"/>
    </units>
    <units name="cm2">
        <unit exponent="2" prefix="centi" units="metre"/>
    </units>
    <units name="mM_per_s">
        <unit units="mM"/>
        <unit exponent="-1" units="second"/>
    </units>
    <units name="per_s">
        <unit exponent="-1" units="second"/>
    </units>
    <units name="mmol_per_s_per_cm2">
        <unit units="mmol"/>
        <unit exponent="-1" units="second"/>
        <unit exponent="-1" units="cm2"/>
    </units>
    <units name="nmol_per_s_per_cm2">
        <unit units="nmol"/>
        <unit exponent="-1" units="second"/>
        <unit exponent="-1" units="cm2"/>
    </units>
    <component name="environment">
        <variable name="time" public_interface="out" units="second"/>
    </component>
    <component name="Concentrations">
        <variable initial_value="140" name="C_ext_Na" public_interface="out" units="mM"/>
        <variable initial_value="5.4954e-5" name="C_ext_H" public_interface="out" units="mM"/>
        <variable initial_value="0.4" name="C_ext_NH4" public_interface="out" units="mM"/>
        <variable initial_value="20" name="C_int_Na" public_interface="out" units="mM"/>
        <variable name="C_int_H" public_interface="out" units="mM"/>
        <variable initial_value="0.4" name="C_int_NH4" public_interface="out" units="mM"/>
        <variable name="time" public_interface="in" units="second"/>
        <variable initial_value="6" name="pH_int" units="dimensionless"/>
        <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
                <eq/>
                <apply>
                    <diff/>
                    <bvar>
                        <ci>time</ci>
                    </bvar>
                    <ci>pH_int</ci>
                </apply>
                <cn cellml:units="per_s">5</cn>
            </apply>
            <apply>
                <eq/>
                <ci>C_int_H</ci>
                <apply>
                    <times/>
                    <cn cellml:units="mM" type="e-notation">1<sep/>3</cn>
                    <apply>
                        <power/>
                        <cn cellml:units="dimensionless">10</cn>
                        <apply>
                            <minus/>
                            <ci>pH_int</ci>
                        </apply>
                    </apply>
                </apply>
            </apply>
        </math>
    </component>
    <component name="NHE3_Parameters">
        <variable initial_value="1.6e-3" name="XTxP0_NHE3_Na" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable initial_value="0.48e-3" name="XTxP0_NHE3_H" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable initial_value="1.6e-3" name="XTxP0_NHE3_NH4" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable initial_value="30" name="K_NHE3_Na" public_interface="out" units="mM"/>
        <variable initial_value="72e-6" name="K_NHE3_H" public_interface="out" units="mM"/>
        <variable initial_value="0.027e3" name="K_NHE3_NH4" public_interface="out" units="mM"/>
    </component>
    <component name="NHE3">
        <variable name="C_ext_Na" public_interface="in" units="mM"/>
        <variable name="C_ext_H" public_interface="in" units="mM"/>
        <variable name="C_ext_NH4" public_interface="in" units="mM"/>
        <variable name="C_int_Na" public_interface="in" units="mM"/>
        <variable name="C_int_H" public_interface="in" units="mM"/>
        <variable name="C_int_NH4" public_interface="in" units="mM"/>
        <variable name="XTxP0_NHE3_Na" public_interface="in" units="nmol_per_s_per_cm2"/>
        <variable name="XTxP0_NHE3_H" public_interface="in" units="nmol_per_s_per_cm2"/>
        <variable name="XTxP0_NHE3_NH4" public_interface="in" units="nmol_per_s_per_cm2"/>
        <variable name="XTxP_NHE3_Na" units="nmol_per_s_per_cm2"/>
        <variable name="XTxP_NHE3_H" units="nmol_per_s_per_cm2"/>
        <variable name="XTxP_NHE3_NH4" units="nmol_per_s_per_cm2"/>
        <variable name="K_NHE3_Na" public_interface="in" units="mM"/>
        <variable name="K_NHE3_H" public_interface="in" units="mM"/>
        <variable name="K_NHE3_NH4" public_interface="in" units="mM"/>
        <variable name="alpha_ext_Na" units="dimensionless"/>
        <variable name="beta_ext_H" units="dimensionless"/>
        <variable name="gamma_ext_NH4" units="dimensionless"/>
        <variable name="alpha_int_Na" units="dimensionless"/>
        <variable name="beta_int_H" units="dimensionless"/>
        <variable name="gamma_int_NH4" units="dimensionless"/>
        <variable name="sum_NHE3" units="nmol_per_s_per_cm2"/>
        <variable name="J_NHE3_Na" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable name="J_NHE3_H" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable name="J_NHE3_NH4" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable name="J_NHE3_Na_Max" units="nmol_per_s_per_cm2"/>
        <variable name="plot" units="dimensionless"/>
        <variable name="J_NHE3_Na2" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable name="J_NHE3_H2" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable name="J_NHE3_NH42" public_interface="out" units="nmol_per_s_per_cm2"/>
        <variable name="sum0_NHE3" units="nmol_per_s_per_cm2"/>
        <variable name="plot2" units="dimensionless"/>
        <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
                <eq/>
                <ci>alpha_ext_Na</ci>
                <apply>
                    <divide/>
                    <ci>C_ext_Na</ci>
                    <ci>K_NHE3_Na</ci>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>beta_ext_H</ci>
                <apply>
                    <divide/>
                    <ci>C_ext_H</ci>
                    <ci>K_NHE3_H</ci>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>gamma_ext_NH4</ci>
                <apply>
                    <divide/>
                    <ci>C_ext_NH4</ci>
                    <ci>K_NHE3_NH4</ci>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>alpha_int_Na</ci>
                <apply>
                    <divide/>
                    <ci>C_int_Na</ci>
                    <ci>K_NHE3_Na</ci>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>beta_int_H</ci>
                <apply>
                    <divide/>
                    <ci>C_int_H</ci>
                    <ci>K_NHE3_H</ci>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>gamma_int_NH4</ci>
                <apply>
                    <divide/>
                    <ci>C_int_NH4</ci>
                    <ci>K_NHE3_NH4</ci>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>XTxP_NHE3_Na</ci>
                <apply>
                    <divide/>
                    <apply>
                        <times/>
                        <ci>XTxP0_NHE3_Na</ci>
                        <cn cellml:units="dimensionless">2</cn>
                        <ci>C_int_H</ci>
                    </apply>
                    <apply>
                        <plus/>
                        <ci>C_int_H</ci>
                        <cn cellml:units="mM" type="e-notation">1<sep/>-3</cn>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>XTxP_NHE3_H</ci>
                <apply>
                    <divide/>
                    <apply>
                        <times/>
                        <ci>XTxP0_NHE3_H</ci>
                        <cn cellml:units="dimensionless">2</cn>
                        <ci>C_int_H</ci>
                    </apply>
                    <apply>
                        <plus/>
                        <ci>C_int_H</ci>
                        <cn cellml:units="mM" type="e-notation">1<sep/>-3</cn>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>XTxP_NHE3_NH4</ci>
                <apply>
                    <divide/>
                    <apply>
                        <times/>
                        <ci>XTxP0_NHE3_NH4</ci>
                        <cn cellml:units="dimensionless">2</cn>
                        <ci>C_int_H</ci>
                    </apply>
                    <apply>
                        <plus/>
                        <ci>C_int_H</ci>
                        <cn cellml:units="mM" type="e-notation">1<sep/>-3</cn>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>sum_NHE3</ci>
                <apply>
                    <plus/>
                    <apply>
                        <times/>
                        <apply>
                            <plus/>
                            <cn cellml:units="dimensionless">1</cn>
                            <ci>alpha_ext_Na</ci>
                            <ci>beta_ext_H</ci>
                            <ci>gamma_ext_NH4</ci>
                        </apply>
                        <apply>
                            <plus/>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_Na</ci>
                                <ci>alpha_int_Na</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_H</ci>
                                <ci>beta_int_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_NH4</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                    <apply>
                        <times/>
                        <apply>
                            <plus/>
                            <cn cellml:units="dimensionless">1</cn>
                            <ci>alpha_int_Na</ci>
                            <ci>beta_int_H</ci>
                            <ci>gamma_int_NH4</ci>
                        </apply>
                        <apply>
                            <plus/>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_Na</ci>
                                <ci>alpha_ext_Na</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_H</ci>
                                <ci>beta_ext_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_NH4</ci>
                                <ci>gamma_ext_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>J_NHE3_Na</ci>
                <apply>
                    <plus/>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_Na</ci>
                                <ci>XTxP_NHE3_H</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>alpha_ext_Na</ci>
                                <ci>beta_int_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>alpha_int_Na</ci>
                                <ci>beta_ext_H</ci>
                            </apply>
                        </apply>
                    </apply>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_Na</ci>
                                <ci>XTxP_NHE3_NH4</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>alpha_ext_Na</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>alpha_int_Na</ci>
                                <ci>gamma_ext_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>J_NHE3_H</ci>
                <apply>
                    <plus/>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_Na</ci>
                                <ci>XTxP_NHE3_H</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>alpha_int_Na</ci>
                                <ci>beta_ext_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>alpha_ext_Na</ci>
                                <ci>beta_int_H</ci>
                            </apply>
                        </apply>
                    </apply>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_H</ci>
                                <ci>XTxP_NHE3_NH4</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>beta_ext_H</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>beta_int_H</ci>
                                <ci>gamma_ext_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>J_NHE3_NH4</ci>
                <apply>
                    <plus/>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_Na</ci>
                                <ci>XTxP_NHE3_NH4</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>alpha_int_Na</ci>
                                <ci>gamma_ext_NH4</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>alpha_ext_Na</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP_NHE3_H</ci>
                                <ci>XTxP_NHE3_NH4</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>gamma_ext_NH4</ci>
                                <ci>beta_int_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>beta_ext_H</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>J_NHE3_Na_Max</ci>
                <apply>
                    <divide/>
                    <apply>
                        <times/>
                        <ci>XTxP0_NHE3_Na</ci>
                        <ci>XTxP0_NHE3_H</ci>
                    </apply>
                    <apply>
                        <plus/>
                        <ci>XTxP0_NHE3_Na</ci>
                        <ci>XTxP0_NHE3_H</ci>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>plot</ci>
                <apply>
                    <divide/>
                    <ci>J_NHE3_Na</ci>
                    <ci>J_NHE3_Na_Max</ci>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>sum0_NHE3</ci>
                <apply>
                    <plus/>
                    <apply>
                        <times/>
                        <apply>
                            <plus/>
                            <cn cellml:units="dimensionless">1</cn>
                            <ci>alpha_ext_Na</ci>
                            <ci>beta_ext_H</ci>
                            <ci>gamma_ext_NH4</ci>
                        </apply>
                        <apply>
                            <plus/>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_Na</ci>
                                <ci>alpha_int_Na</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_H</ci>
                                <ci>beta_int_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_NH4</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                    <apply>
                        <times/>
                        <apply>
                            <plus/>
                            <cn cellml:units="dimensionless">1</cn>
                            <ci>alpha_int_Na</ci>
                            <ci>beta_int_H</ci>
                            <ci>gamma_int_NH4</ci>
                        </apply>
                        <apply>
                            <plus/>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_Na</ci>
                                <ci>alpha_ext_Na</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_H</ci>
                                <ci>beta_ext_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_NH4</ci>
                                <ci>gamma_ext_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>J_NHE3_Na2</ci>
                <apply>
                    <plus/>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_Na</ci>
                                <ci>XTxP0_NHE3_H</ci>
                            </apply>
                            <ci>sum0_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>alpha_ext_Na</ci>
                                <ci>beta_int_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>alpha_int_Na</ci>
                                <ci>beta_ext_H</ci>
                            </apply>
                        </apply>
                    </apply>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_Na</ci>
                                <ci>XTxP0_NHE3_NH4</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>alpha_ext_Na</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>alpha_int_Na</ci>
                                <ci>gamma_ext_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>J_NHE3_H2</ci>
                <apply>
                    <plus/>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_Na</ci>
                                <ci>XTxP0_NHE3_H</ci>
                            </apply>
                            <ci>sum0_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>alpha_int_Na</ci>
                                <ci>beta_ext_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>alpha_ext_Na</ci>
                                <ci>beta_int_H</ci>
                            </apply>
                        </apply>
                    </apply>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_H</ci>
                                <ci>XTxP0_NHE3_NH4</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>beta_ext_H</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>beta_int_H</ci>
                                <ci>gamma_ext_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>J_NHE3_NH42</ci>
                <apply>
                    <plus/>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_Na</ci>
                                <ci>XTxP0_NHE3_NH4</ci>
                            </apply>
                            <ci>sum0_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>alpha_int_Na</ci>
                                <ci>gamma_ext_NH4</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>alpha_ext_Na</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                    <apply>
                        <times/>
                        <apply>
                            <divide/>
                            <apply>
                                <times/>
                                <ci>XTxP0_NHE3_H</ci>
                                <ci>XTxP0_NHE3_NH4</ci>
                            </apply>
                            <ci>sum_NHE3</ci>
                        </apply>
                        <apply>
                            <minus/>
                            <apply>
                                <times/>
                                <ci>gamma_ext_NH4</ci>
                                <ci>beta_int_H</ci>
                            </apply>
                            <apply>
                                <times/>
                                <ci>beta_ext_H</ci>
                                <ci>gamma_int_NH4</ci>
                            </apply>
                        </apply>
                    </apply>
                </apply>
            </apply>
            <apply>
                <eq/>
                <ci>plot2</ci>
                <apply>
                    <divide/>
                    <ci>J_NHE3_Na2</ci>
                    <ci>J_NHE3_Na_Max</ci>
                </apply>
            </apply>
        </math>
    </component>
    <connection>
        <map_components component_1="NHE3_Parameters" component_2="NHE3"/>
        <map_variables variable_1="K_NHE3_Na" variable_2="K_NHE3_Na"/>
        <map_variables variable_1="K_NHE3_H" variable_2="K_NHE3_H"/>
        <map_variables variable_1="K_NHE3_NH4" variable_2="K_NHE3_NH4"/>
        <map_variables variable_1="XTxP0_NHE3_Na" variable_2="XTxP0_NHE3_Na"/>
        <map_variables variable_1="XTxP0_NHE3_H" variable_2="XTxP0_NHE3_H"/>
        <map_variables variable_1="XTxP0_NHE3_NH4" variable_2="XTxP0_NHE3_NH4"/>
    </connection>
    <connection>
        <map_components component_1="Concentrations" component_2="NHE3"/>
        <map_variables variable_1="C_ext_Na" variable_2="C_ext_Na"/>
        <map_variables variable_1="C_ext_H" variable_2="C_ext_H"/>
        <map_variables variable_1="C_ext_NH4" variable_2="C_ext_NH4"/>
        <map_variables variable_1="C_int_Na" variable_2="C_int_Na"/>
        <map_variables variable_1="C_int_H" variable_2="C_int_H"/>
        <map_variables variable_1="C_int_NH4" variable_2="C_int_NH4"/>
    </connection>
    <connection>
        <map_components component_1="Concentrations" component_2="environment"/>
        <map_variables variable_1="time" variable_2="time"/>
    </connection>
</model>