Search results
Results from the WOW.Com Content Network
Autocatalytic cycle of formose reaction showing how glyceraldehyde can be both the catalyst and the product of one portion of this complex reaction type. An early example of autocatalysis is the formose reaction, in which formaldehyde and base produce sugars and related polyols. Characteristic of autocatalysis, this reaction rate is extremely ...
An illustrative example is the effect of catalysts to speed the decomposition of hydrogen peroxide into water and oxygen: . 2 H 2 O 2 → 2 H 2 O + O 2. This reaction proceeds because the reaction products are more stable than the starting compound, but this decomposition is so slow that hydrogen peroxide solutions are commercially available.
Platinum(IV) oxide, PtO 2, also known as "Adams' catalyst", is a black powder that is soluble in potassium hydroxide (KOH) solutions and concentrated acids. [41] PtO 2 and the less common PtO both decompose upon heating. [ 13 ]
In-home medical care is often and more accurately referred to as home health care or formal care. Home health care is different non-medical care, custodial care, or private-duty care which refers to assistance and services provided by persons who are not nurses, doctors, or other licensed medical personnel. For patients recovering from surgery ...
Catalyst deactivation is defined as a loss in catalytic activity and/or selectivity over time. Substances that decrease reaction rate are called poisons. Poisons chemisorb to catalyst surface and reduce the number of available active sites for reactant molecules to bind to. [22]
The Grubbs group successfully polymerized the 7-oxo norbornene derivative using ruthenium trichloride, osmium trichloride as well as tungsten alkylidenes. [38] They identified a Ru(II) carbene as an effective metal center and in 1992 published the first well-defined, ruthenium-based olefin metathesis catalyst, (PPh 3) 2 Cl 2 Ru=CHCH=CPh 2: [39]
AOL latest headlines, entertainment, sports, articles for business, health and world news.
Catamaran Corporation (formerly SXC Health Solutions) is the former name of a company that now operates within UnitedHealth Group's OptumRX division (since July 2015). It sells pharmacy benefit management and medical record keeping services to businesses in the United States [3] and to a broad client portfolio, including health plans and employers. [4]