The phrase "a closed natural" is not correct and does not convey a clear meaning in written English.
It may be intended to describe a specific concept, but without context, it is ambiguous and not usable.
Example: "The study focused on a closed natural system, which is essential for understanding ecological balance."
Alternatives: "a closed system" or "a natural closure".
A closed loop natural circulation system employs thermally induced density gradients in single phase or two-phase liquid form to induce circulation of the working fluid thereby obviating the need for any mechanical moving parts such as pumps and pump controls.
The close agreement between the shoot density and biomass developed by closed natural stands and that predicted from seagrass architecture suggested that the upper limit to density and aboveground biomass, such as that defined by the self-thinning law, is already imprinted within the basic architecture of seagrasses (i.e. spacer length in between consecutive shoots).
The maximum total (above and below) carbon was found in closed natural forest (208.22 Mg ha− 1) followed by open natural forests (95.11 Mg ha− 1) and Teak plantation (56.06 mg ha− 1).
It is also reasonable that in isolated (closed) natural environments, nutrients and thus sources of energy must be exhausted at some point, and thus for simple energetic reasons multiplication becomes impossible and a dormant state likely (if later resuscitation proves it to be so).
Transgenic plants were grown in a closed greenhouse under natural sunlight.
The first one is a closed cylinder cooled with natural convection, the fins are manufactured around the second reactor and the third reactor is cooled with water circulating around the reactor.
Combination of microwave, ultrasound and the recycled "in situ" water of citrus peels allow us to obtain high added values compounds in shorter time and managed to make a closed loop using only natural resources provided by the plant which makes the whole process intensified in term of time and energy saving, cleanliness and reduced waste water.
To provide a quiet testing environment, all tests will be performed in a closed quiet room with natural light from windows.
Puncturing the blister makes it vulnerable to infection, while a closed blister has a natural barrier to prevent germs from penetrating.
For a simply supported rectangular plate, carrying liquid with reservoir conditions at its edges, a closed form solution of the natural frequencies and modes of the plate-liquid combination is developed.
