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Pentaerythritol tetraacrylate (PETA, sometimes PETTA, PETRA) is an organic compound. It is a tetrafunctional acrylate ester used as a monomer in the manufacture of polymers . [ 1 ] As it is a polymerizable acrylate monomer, it is nearly always supplied with an added polymerisation inhibitor , such as MEHQ (monomethyl ether hydroquinone).
While for 1,4-pentadiene the sp 2-hybridization leads to a bond angle of 120° between the single and double bond, in 1,4-pentadiyne it is a 180° angle due to the sp-hybrid orbital. Both triple bonds in 1,4-position destabilize each other according to another study by 3.9 kcal · mol −1 , a repulsion between the p orbital lobes close to the ...
The title screen of Pokémon Black and Blue, a parody of Pokémon Black 2 and White 2.Injured Pokémon from left to right: Oshawott, Snivy, Tepig, and Pikachu. People for the Ethical Treatment of Animals (PETA), an animal rights organization based in the United States, has released a number of browser games on its website that have parodied existing video games.
Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate is significantly less volatile than simpler phenolic antioxidants such as butylhydroxytoluene (BHT). This makes it more suitable to stabilising plastics, as it is not driven out by the high temperatures experienced during plastic extrusion and moulding, [2] when they are heated to 150-320 °C (300–600 °F). [3]
The NBA All-Star Weekend could also include a variation of last season's NBA versus WNBA 3-point challenge which featured Golden State's Stephen Curry and Sabrina Ionescu of the New York Liberty.
A serving of red meat is usually around 3 ounces, which would be either two slices of bacon, 1.5 slices of bologna or one hot dog, according to a news release on the study.
The General Dynamics RIM-24 Tartar was a medium-range naval surface-to-air missile (SAM), among the earliest SAMs to equip United States Navy ships. The Tartar was the third of the so-called "3 Ts", the three primary SAMs the Navy fielded in the 1960s and 1970s, the others being the RIM-2 Terrier and RIM-8 Talos .
For California Governor Gavin Newsom and other Democratic leaders in the left-leaning state, the still-raging wildfires could have been a chance to showcase their competence and unity with the ...