Magnesium salt, chemical formula MgCl2.

Brucite-containing (Mg(OH)2) material favourably influencing the development of the chemical ambience in the emplacement areas.

Force field caused among others by moving electric charges. Magnetic fields occur in the vicinity of conductors flown through by current and in the vicinity of permanent magnets. In case of permanent magnets currents caused by the moving electrons inside the atom are the source of the magnetic field. The magnetic field strength H marks strength and direction of the magnetic field, its measure is ampere per metre (A/m). Besides the magnetic field strength also the magnetic flux density B describes the strength of the magnetic field, the measure is tesla (T). 1 T = 1 Vs/m², the measure microtesla (µT) is common. The following applies to the conversion of magnetic flux density into magnetic field strength in the air or in biological tissue: 1 µT corresponds to 0.8 A/m.

Measure of the strength and direction of the magnetic field. The measure is Ampere per metre (A/m).

Quantity describing the induction effect of the magnetic field, the measure is Tesla (T). Magnetic flux density and magnetic field strength are connected through permeability µ (a material constant).

Magnetic flux density, measure of the number of magnetic field lines per area. The measure is Tesla (T). 1 T = 1 Vs/m² (Volt second per square metre).

Magnetic Resonance Tomography is also called MRT or MRI. Magnetic Resonance Tomography is a cross-sectional imaging technique with high soft tissue contrast especially suited for the visualization of the structure and function of organs and tissues. MRT does not use ionizing radiation or radioactive substances, but strong magnetic fields and electromagnetic radiofrequency fields.

Logarithmic measure of the seismic wave energy released by an earthquake. It is derived from seismic registrations.

Supplies the mine shafts with fresh air by creating an artificial air flow.

A term for the Upper Jurassic Age (White Jurassic) ca. 156 to 140 million years ago.

The mean value (arithmetical) corresponds to the sum of all values of a variable X divided by the number n of the values.

The median is the value which divides the distribution of a variable X exactly in two halves, therefore also the alternative term central value.

1 megabecquerel (MBq) = 1.000.000 becquerel (Bq).

Studies where the results of different investigations on a certain topic are compared, summarised and evaluated according to certain parameters.

The Sievert (Sv) is the unit (SI-unit) of dose equivalent and effective dose.

In general, fractions of the unit of dose are used in radiation protection practice: 1 Sievert = 1,000 millisieverts (mSv) = 1,000,000 microsieverts (µSv) = 1,000,000,000 nanosieverts (nSv).

1 microsievert is one millionth sievert = 0.000001 sievert.

Dose is often related to a period of time, i.e. per year (mSv/a) or per hour (mSv/h).

Movement of water, solutions, oil and gas through porous and permeable rocks and rock layers.

Millimeter waves belong to the extremely high frequency band of electromagnetic radiation with frequencies from 30 to 300 gigahertz (GHz) and wavelengths between 10 millimeter and 1 millimeter.

The Sievert (Sv) is the unit (SI-unit) of dose equivalent and effective dose.

In general, fractions of the unit of dose are used in radiation protection practice: 1 sievert = 1 000 millisieverts (mSv) = 1 000 000 microsieverts (µSv) = 1 000 000 000 nanosieverts (nSv).

1 millisievert is a one thousandth sievert = 0.001 sievert.

Dose is often related to a period of time, i.e. per year (mSv/a) or per hour (mSv/h).

Air in the mine, drawn off because of its reduced oxygen content or respectively its content of harmful gases.

Planned cavity underground produced by mining measures.

(also: mixed oxide fuel)

Nuclear fuel consisting of a mixture of uranium and plutonium oxide.

Liquid for the production of building materials.

In a nuclear reactor, a moderator serves to slow free neutrons produced in the reactor core during the fission process. Similar to billiard balls, neutrons collide with the nuclei of the moderator and thus give off part of their kinetic energy. Since the largest energy transfers occur in the elastic collisions of two equally heavy particles, light atoms such as hydrogen (in the form of water or polyethylene) and carbon (in the form of graphite) are mostly used as moderator. The slowed neutrons are better suitable for both continuing the fission in the reactor core and carrying out scientific experiments in a research reactor.

Change of one or more parameters of a high-frequency carrier wave for the transmittance of information. E. g. in radio programmes (carrier in the MHz range) language (kHz-range) is transmitted by frequency modulation by changing the frequency of the carrier wave in the rhythm of the language signal. Other procedures are amplitude (medium wave) modulation, frequency (UKW) modulation or phase (beam radio) modulation.

Molecular biology is an interdisciplinary science dealing with the molecular structures and functions in living organisms.

A molecule is a group of atoms held together by chemical bonds. A molecule can consist of several atoms of the same chemical element or atoms of different elements.

The hydrogen molecule consists of atoms of the same chemical element: H₂ = 2 hydrogen atoms (H: chemical symbol for hydrogen).

The water molecule, in contrast, consists of atoms of different chemical elements: H₂O = 2 hydrogen atoms + 1 oxygen atom (O: chemical symbol for oxygen).

Areas where persons can receive per calendar year an effective dose above 1 mSv or organ doses above 15 mSv for the eye lens or 50 mSv for the skin, hands, forearms, feet, and ankles.

Chemical substance

Monomers are in the strict sense single molecules.

• Chemistry: The organic chemist understands monomers to be molecules with a reactive double bond or with functional groups. These can react with each other to long chain molecules, the polymers.
• Biochemistry: In the case of proteins (white of egg) the term "monomer" means the existence of a single subunit. Some proteins are composed of several monomers.

Incidence, number of diseases within a population

Death rate

Nuclear medical examination of the heart (Myocardium = heart muscle) for the evaluation of the myocardial circulation and ventricular function of the heart.