Korea, Latvia, Lithuania, Luxemburg, Mexico, Netherlands,
New Zealand, Norway, Poland, Portugal, Slovak Republic,
Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, USA.
Olefins
Unsaturated hydrocarbons of general formula C n H 2n containing
a C=C double bond, either terminal or internal.
OPEX
OPerational EXpenditure, costs for running a plant or a process.
It includes personnel costs, maintenance among others.
Orbital
Energy state of an electron in an atom (atomic orbital) or a
molecule (molecular orbital).
Oxidation state A positive or negative number that indicates the number of
electrons a bonded atom in a compound has respectively lost or
acquired (formally in covalent bonds or really in ionic bonds)
with respect to the elemental state (oxidation state zero).
Ozone hole
Reduction of the stratospheric ozone layer that protects our
planet from UV-solar radiations.
P
Pay-back time
Period of time during which investment costs are paid by
the net income of a process.
PCC
Pulverized Coal Combustion, for a better and more
complete combustion.
PERC
Perchloroethene, Cl 2 C=CCl 2 , a fluid used in dry cleaning.
Perennial
Something that has an endless existence.
Petrochemistry
Chemistry of petrol, processes based on oil conversion.
Phase
A homogeneous system, that has the same properties in all
its points.
Photoelectrochemical A system that generates a flux of electrons in an
electrochemical cell upon light irradiation over electrodes
made of semi-conducting materials.
Photosensitizer
A material that is excited by light irradiation and can
transfer its energy to other species.
Photovoltaic cell
A device that generates a difference of electrical potential
and an electrical current under solar irradiation of
semiconductors.
Point group
Any of the 32 sets of symmetry operations which can be
used to characterize three-dimensional lattices and are the
basis of the system of crystal classes.
Polycarbonates
Polymers made of ordered alternated units of an organic
moiety and the –OC(O)O– group-of-atoms: –[CH 2 –CH 2 –
O–C(O)O] n – is ethene carbonate.
Polymers
A material made of a repetitive sequence of one single
unit (monomer) or of two co-monomers.
256
Appendix I
New Zealand, Norway, Poland, Portugal, Slovak Republic,
Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, USA.
Olefins
Unsaturated hydrocarbons of general formula C n H 2n containing
a C=C double bond, either terminal or internal.
OPEX
OPerational EXpenditure, costs for running a plant or a process.
It includes personnel costs, maintenance among others.
Orbital
Energy state of an electron in an atom (atomic orbital) or a
molecule (molecular orbital).
Oxidation state A positive or negative number that indicates the number of
electrons a bonded atom in a compound has respectively lost or
acquired (formally in covalent bonds or really in ionic bonds)
with respect to the elemental state (oxidation state zero).
Ozone hole
Reduction of the stratospheric ozone layer that protects our
planet from UV-solar radiations.
P
Pay-back time
Period of time during which investment costs are paid by
the net income of a process.
PCC
Pulverized Coal Combustion, for a better and more
complete combustion.
PERC
Perchloroethene, Cl 2 C=CCl 2 , a fluid used in dry cleaning.
Perennial
Something that has an endless existence.
Petrochemistry
Chemistry of petrol, processes based on oil conversion.
Phase
A homogeneous system, that has the same properties in all
its points.
Photoelectrochemical A system that generates a flux of electrons in an
electrochemical cell upon light irradiation over electrodes
made of semi-conducting materials.
Photosensitizer
A material that is excited by light irradiation and can
transfer its energy to other species.
Photovoltaic cell
A device that generates a difference of electrical potential
and an electrical current under solar irradiation of
semiconductors.
Point group
Any of the 32 sets of symmetry operations which can be
used to characterize three-dimensional lattices and are the
basis of the system of crystal classes.
Polycarbonates
Polymers made of ordered alternated units of an organic
moiety and the –OC(O)O– group-of-atoms: –[CH 2 –CH 2 –
O–C(O)O] n – is ethene carbonate.
Polymers
A material made of a repetitive sequence of one single
unit (monomer) or of two co-monomers.
256
Appendix I