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Reducing, neutral and oxidizing oxyacetylene flames. A flame is affected by the fuel introduced and the oxygen available. A flame with a balanced oxygen-fuel ratio is called a neutral flame. The color of a neutral flame is semi-transparent purple or blue. [1] This flame is optimal for many uses because it does not oxidize or deposit soot onto ...
Roach Motel is an American brand of a roach bait device designed to catch cockroaches.Although the term is the subject of a trademark registration by the insect control brand Black Flag, the phrase roach motel has come to be used as a reference to all traps that use a scent or other form of bait to lure cockroaches into a compartment in which a sticky substance causes them to become trapped.
A packaging gas is used to pack sensitive materials such as food into a modified atmosphere environment. The gas used is usually inert , or of a nature that protects the integrity of the packaged goods, inhibiting unwanted chemical reactions such as food spoilage or oxidation .
The trap features a chain with a swivel snap at one end and a ring at the other; the spikes on its jaws point inward. Traps of this kind were commonly used for black bear trapping and were set with clamps (these types are not used any more) Setting and triggering a "gin" or foothold trap, demonstrated at the Black Country Living Museum
For baiting to be effective, proper placement and techniques are a must. Baits should be used as close to the nest as possible. A bait just 50 cm further away from a nest can reduce the amount of bait eaten by half. If the same amount of bait is used to cover two areas, the area with the greater number of traps will have most bait eaten.
Insect traps are sometimes used in pest management programs instead of pesticides but are more often used to look at seasonal and distributional patterns of pest occurrence. This information may then be used in other pest management approaches. The trap mechanism or bait can vary widely. Flies and wasps are attracted by proteins.
Any oxygen gas content in the vacuum line or any leak in the vacuum line will result in liquid oxygen mixed with the target vapors, often with explosive results. When performed on a larger scale, this technique is called freeze-drying, and the cold trap is referred to as the condenser.
A reducing atmosphere is an atmosphere in which oxidation is prevented by absence of oxygen and other oxidizing gases or vapours, and which may contain actively reductant gases such as hydrogen, carbon monoxide, methane and hydrogen sulfide that would be readily oxidized to remove any free oxygen.