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The Tanner scale (also known as the Tanner stages or sexual maturity rating ( SMR )) is a scale of physical development as children transition into adolescence and then adulthood. The scale defines physical measurements of development based on external primary and secondary sex characteristics, such as the size of the breasts, genitals ...
The Klein Sexual Orientation Grid ( KSOG) developed by Fritz Klein attempts to measure sexual orientation by expanding upon the earlier Kinsey scale. Fritz Klein founded the American Institute of Bisexuality in 1998 which is continuing his work by sponsoring bisexual -inclusive sex research, educating the general public on sexuality, and ...
Infobox references. 3,4-Methylenedioxyphenylpropan-2-one[ 1] or piperonyl methyl ketone ( MDP2P or PMK) is a chemical compound consisting of a phenylacetone moiety substituted with a methylenedioxy functional group. It is commonly synthesized from either safrole (which, for comparison, is 3- [3,4- (methylenedioxy)phenyl]-2-propene) or its ...
4-Phenyl-1,2,4-triazoline-3,5-dione (PTAD) is an azodicarbonyl compound. PTAD is one of the strongest dienophiles and reacts rapidly with dienes in Diels-Alder reactions. [ 1] The most prominent use of PTAD was the first synthesis of prismane in 1973. [ 2]
Infobox references. 1,2,3,4-Tetraphenylnaphthalene is a polycyclic aromatic hydrocarbon commonly prepared in the undergraduate teaching laboratory as an introduction to the Diels-Alder reaction, in this case between benzyne, which acts as the dienophile, (generated in situ) and tetraphenylcyclopentadienone, which acts as the diene. [ 3]
2,3,4,6-Tetrachlorophenol. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). 2,3,4,6-Tetrachlorophenol ( 2,3,4,6-TCP) is a chlorinated derivative of phenol with the molecular formula C 6 H 2 Cl 4 O.
3,4-Dichlorophenyl isocyanate is a chemical compound used as a chemical intermediate and in organic synthesis. It is a solid, and ranges in colour from white to yellow. It is an irritant for tissues including eyes and mucous membranes, and inhalation of dust from the chemical is poisonous. [1] It can be used industrially in the preparation of ...
A poll from The Associated Press-NORC Center finds that Minnesota Gov. Tim Walz has an edge over Ohio's Sen. J.D. Vance in favorability, but is less known by voters ahead of the 2024 election.