1, The full form of MRT is Mean Residence Time. It’s used on Medical ,Medicines & Drugs in Worldwide

A new definition of the mean residence time is proposed which includes the commonly used definition as a special case. The advantage of the new definition is that it applies for both linear and non‐linear systems. Some practical advantages which follow from the new definition are discussed. Procedures for using urinary excretion data in mean residence time estimation are discussed.

The mean residence time (MRT) of C sequestered in soil and biota depends on numerous factors, including land use, management system, soil type, vegetation, and climate. The MRT is computed as a ratio of the pool (Mg ha^− 1) to the flux (Mg/ha/year). On this basis, the global MRT of C is 5 years in the atmosphere, 10 years in the vegetation, 35 years in the soils, and 100 years in the ocean (Figure 3). However, there is a wide range of MRT depending on the site-specific conditions and characteristics of the organic matter. For example, the MRT of soil organic matter is less than 1 year for the labile fraction, 1–100 years for the intermediate fraction, and several millennia for the passive fraction. The MRT also depends on management. Conversion from plow till to no till sequesters C in soil, and the MRT depends on continuous use of no till. Even occasional plowing can lead to emission of CO₂.

2, The full form of MRT is Magnetic Resonance Tomography. It’s used on Medical ,Instruments & Equipment in Worldwide

Magnetic Resonance Imaging (MRI) is a non-invasive imaging technology that produces three dimensional detailed anatomical images. It is often used for disease detection, diagnosis, and treatment monitoring. It is based on sophisticated technology that excites and detects the change in the direction of the rotational axis of protons found in the water that makes up living tissues.

MRIs employ powerful magnets which produce a strong magnetic field that forces protons in the body to align with that field. When a radiofrequency current is then pulsed through the patient, the protons are stimulated, and spin out of equilibrium, straining against the pull of the magnetic field. When the radiofrequency field is turned off, the MRI sensors are able to detect the energy released as the protons realign with the magnetic field. The time it takes for the protons to realign with the magnetic field, as well as the amount of energy released, changes depending on the environment and the chemical nature of the molecules. Physicians are able to tell the difference between various types of tissues based on these magnetic properties.

3, The full form of MRT is Metro Rail Transit. It’s used on Transport & Travel ,Land Transport in Philippines

Metro Rail Transit (MRT), better known as Blue Line is rail transit system along Epifanio Delos Santos Avenue (EDSA) in Metro Manila, Philippines.

4, The full form of MRT is Mass Rapid Transit. It’s used on Transport & Travel ,Land Transport in Singapore

‘Mass Rapid Transit‘ (MRT) is a term used to describe modes of urban transport (both road and rail based) that carry large volumes of passengers quickly. They tend to be along well-defined corridors connecting suburbs to city centres, and in most cases have reserved right-of-way for some or all of their route length.

Rapid transit or mass rapid transit, also known as heavy rail, metro, subway, tube, U-Bahn, metropolitana or underground, is a type of high-capacity public transport generally found in urban areas.