Search results
Results From The WOW.Com Content Network
Hot water reset. Hot water reset, also called outdoor reset ( ODR ), is an energy-saving automatic control algorithm for heating boilers that are typically fired with fuel oil or natural gas. A hot water reset control loop measures the outside air temperature; this information is used to estimate demand or heating load as the outdoor ...
Thermoregulation. Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when the surrounding temperature is very different. A thermoconforming organism, by contrast, simply adopts the surrounding temperature as its own body temperature, thus avoiding the need for internal thermoregulation.
Dew. A drop of dew in the middle of a clover. Dew formed on the surface of strawberry leaves. A drop of dew on a Colocasia leaf at the Garden Society of Gothenburg. Dew drops on a flower. Dense dew on grass. Under cold temperatures, dew may freeze and form a layer of ice over plants and objects. Dew is water in the form of droplets that appears ...
Breeding for heat stress tolerance in plants. Heat stress due to increased temperature is a very important problem globally. [citation needed] Occasional or prolonged high temperatures cause different morpho-anatomical, physiological and biochemical changes in plants. The ultimate effect is on plant growth as well as development and reduced ...
Guttation is the exudation of drops of xylem and phloem sap on the tips or edges of leaves of some vascular plants, such as grasses, and also a number of fungi. Ancient Latin gutta means "a drop of fluid", whence modern botany formed the word guttation to designate that a plant exudes drops of fluid onto the outer surface of the plant, when the ...
The advice sometimes given to withhold water to produce flower buds has been shown to be incorrect. Temperature: Holiday cacti grow best when they are placed in a location with partial shade, with a temperature between 70 and 80 °F (21 and 27 °C). [36] They can not tolerate temperature less than 10 °C (50 °F). [37]
The wet-bulb temperature is the lowest temperature that can be reached under current ambient conditions by the evaporation of water only. Even heat-adapted people cannot carry out normal outdoor activities past a wet-bulb temperature of 32 °C (90 °F), equivalent to a heat index of 55 °C (131 °F).
Thermal comfort is the condition of mind that expresses subjective satisfaction with the thermal environment. [ 1] The human body can be viewed as a heat engine where food is the input energy. The human body will release excess heat into the environment, so the body can continue to operate. The heat transfer is proportional to temperature ...