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In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass through. In oil refineries, traps are used to prevent hydrocarbons and other dangerous gases and chemical fumes from escaping through drains.
In chemistry, a chemical trap is a chemical compound that is used to detect unstable compounds. [1] The method relies on efficiency of bimolecular reactions with reagents to produce a more easily characterize trapped product. In some cases, the trapping agent is used in large excess.
Tetrapropylammonium perruthenate (TPAP or TPAPR) is the chemical compound described by the formula N(C 3 H 7) 4 RuO 4. Sometimes known as the Ley–Griffith reagent, this ruthenium compound is used as a reagent in organic synthesis. This salt consists of the tetrapropylammonium cation and the perruthenate anion, RuO − 4.
[2] [3] As such, they serve the same purpose as the well-known S-phrases, which they are intended to replace. Precautionary statements are one of the key elements for the labelling of containers under the GHS, along with: [4] an identification of the product; one or more hazard pictograms (where necessary)
Chemist Linus Pauling first developed the hybridisation theory in 1931 to explain the structure of simple molecules such as methane (CH 4) using atomic orbitals. [2] Pauling pointed out that a carbon atom forms four bonds by using one s and three p orbitals, so that "it might be inferred" that a carbon atom would form three bonds at right angles (using p orbitals) and a fourth weaker bond ...
Elizabeth's PTSD is much more prominent on the show than it is in the books. In both the book and the show, Elizabeth is raped by a professor at UCLA, which leads to her quiet dismissal from the ...
In experimental physics, a quadrupole ion trap or paul trap is a type of ion trap that uses dynamic electric fields to trap charged particles. They are also called radio frequency (RF) traps or Paul traps in honor of Wolfgang Paul , who invented the device [ 1 ] [ 2 ] and shared the Nobel Prize in Physics in 1989 for this work. [ 3 ]
The TRAP gene has been cloned and sequenced in porcine, rat, human, and murine species. [11] Human, murine, and porcine TRAP genes all contain 5 exons, and have the ATG codon at the beginning of exon 2, with exon 1 being non-coding. Within the exon 1 promoter, there are three distinct “tissue-specific” promoters: 1A, 1B, and 1C. [12]