Trapping elk in pits is an extremely effective hunting method, and as early as the 16th century the Norwegian government tried to restrict their use.

* Trapping of free electrons by surface states causes the surface depletion.

Trapping was minimal and, after traveling about 1300 miles ( 650 on foot ), he finally arrived at Fort Smith, Arkansas.

Trapping is also usually considered a separate activity.

Trapping of the long-wave radiation due to the presence of clouds reduces the radiative forcing of the greenhouse gases compared to the clear-sky forcing.

Trapping took place in the fall when the fur became prime.

These situations are broken down into ranges ( Kicking, Punching, Trapping and Grappling ), with techniques flowing smoothly between them.

Immobilization Attack ( I. A ): The immobilization attack is the effective use of “ Trapping ”.

Trapping is a method of attack that results in the holding down of an opponent ’ s hand or leg providing a safe route of attack.

Trapping did not become important until the imposition of the fur tax by the tsarist government.

The short features the duo as partners and owners of " Donald and Goofy Trapping Co ." They have settled in the Arctic for an unspecified period of time, to capture live walruses to bring back to civilization.

Trapping is also an important means of income.

The concept of the speed camera can be dated back to at least 1905 ; Popular Mechanics reports on a patent for a " Time Recording Camera for Trapping Motorists " that enabled the operator to take time-stamped images of a vehicle moving across the start and endpoints of a measured section of road.

Trapping is used to control or eliminate feral American Mink populations.

Trapping rabbits helped farmers, stockmen and stationhands by providing something to eat and extra income, and in some cases helped pay off farming debts.

Trapping or hunting pits were placed in areas in close proximity of the hunted animal in question, usually in known places where the animals moved.

Trapping wild parrots for the pet trade, as well as hunting, habitat loss and competition from invasive species, has diminished wild populations, with parrots being subjected to more exploitation than any other group of birds.

Trapping and hunting of Cinereous Vultures is particularly prevalent in China and Russia.

* Neuman, K. C., and Block S. M Review on Optical Trapping method

* J. P. Reid on Review of Optical Trapping of Droplets in Air

Trapping the spirit of Mata Nui in the Ignika, Teridax shot the mask into space, so that the former Great Spirit cannot interfere with his control over the universe.

Trapping of muskrat at the Mackenzie River delta was the main source of income for the Indians and Eskimos during 1920 – 1960, but has since declined.

Trapping resumed in the U. S. after 1962 once numbers had recovered to sufficient numbers.

The abundance of elements in Earth's crust differs from those in the universe ( and also the Sun and heavy planets like Jupiter ) mainly in selective loss of the very lightest elements ( hydrogen and helium ) and also volatile neon, carbon, nitrogen and sulfur, as a result of solar heating in the early formation of the solar system.

The CNO cycle ( for carbon – nitrogen – oxygen ) is one of two sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton – proton chain.

The first proposed catalytic cycle for the conversion of hydrogen into helium was at first simply called the carbon – nitrogen cycle ( CN cycle ), also honorarily referred to as the Bethe – Weizsäcker cycle, because it does not involve a stable isotope of oxygen.

This is a logical dividing line, since the normal boiling points of the so-called permanent gases ( such as helium, hydrogen, neon, nitrogen, oxygen, and normal air ) lie below − 180 ° C while the Freon refrigerants, hydrogen sulfide, and other common refrigerants have boiling points above − 180 ° C.

Liquefied gases, such as liquid nitrogen and liquid helium, are used in many cryogenic applications.

Superconductors are frequently used to increase power throughput, requiring cryogenic liquids such as nitrogen or helium to cool special alloy-containing cables to increase power transmission.

Cryogenic cooling of devices and material is usually achieved via the use of liquid nitrogen, liquid helium, or a cryocompressor ( which uses high pressure helium lines ).

* Cryofixation – freezing a specimen so rapidly, to liquid nitrogen or even liquid helium temperatures, that the water forms vitreous ( non-crystalline ) ice.

An almost ideal inductor ( Q approaching infinity ) can be created by immersing a coil made from a superconducting alloy in liquid helium or liquid nitrogen.

Furthermore, aside from helium and hydrogen, it is the least dense element in a solid or liquid state, being only 2 / 3 as dense as liquid nitrogen ( 0. 808 g / cm < sup > 3 </ sup >).

Above this mass, in the upper main sequence, the nuclear fusion process mainly uses atoms of carbon, nitrogen and oxygen as intermediaries in the CNO cycle that produces helium from hydrogen atoms.

Neon is monatomic, making it lighter than the molecules of diatomic nitrogen and oxygen which form the bulk of Earth's atmosphere ; a balloon filled with neon will rise in air, albeit more slowly than a helium balloon.

Spectroscopic observation of nova ejecta nebulae has shown that they are enriched in elements such as helium, carbon, nitrogen, oxygen, neon and magnesium.

The noble gases, except helium and probably neon, as well as nitrogen, oxygen and hydrogen cause a decrement in mental function, but their effect on psychomotor function ( processes affecting the coordination of sensory or cognitive processes and motor activity ) varies widely.

The by-products of processing include ethane, propane, butanes, pentanes, and higher molecular weight hydrocarbons, hydrogen sulphide ( which may be converted into pure sulfur ), carbon dioxide, water vapor, and sometimes helium and nitrogen.

Non-hydrocarbons such as carbon dioxide, nitrogen, helium ( rarely ), and hydrogen sulfide must also be removed before the natural gas can be transported.

This is important commercially because liquid nitrogen can be produced cheaply on-site from air, and is not prone to some of the problems ( for instance solid air plugs ) of helium in piping.

The Moon is deficient in volatiles such as argon, helium and compounds of carbon, hydrogen and nitrogen.

These are cooled by liquid nitrogen or helium.

Mostly liquid helium and liquid nitrogen are used as refrigerants.

Trimix is a breathing gas, consisting of oxygen, helium and nitrogen, and is often used in deep commercial diving and during the deep phase of dives carried out using technical diving techniques.

The mixture of helium and oxygen with a 0 % nitrogen content is generally known as Heliox.

The main reason for adding helium to the breathing mix is to reduce the proportions of nitrogen and oxygen below those of air, to allow the gas mix to be breathed safely on deep dives.

Because of its low molecular weight, helium enters and leaves tissues more rapidly than nitrogen as the pressure is increased or reduced ( this is called on-gassing and off-gassing ).