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  2. Signs and symptoms of cancer - Wikipedia

    en.wikipedia.org/wiki/Signs_and_symptoms_of_cancer

    Signs and symptoms are not mutually exclusive, for example a subjective feeling of fever can be noted as sign by using a thermometer that registers a high reading. [7] Because many symptoms of cancer are gradual in onset and general in nature, cancer screening (also called cancer surveillance) is a key public health priority. This may include ...

  3. Catalytic converter - Wikipedia

    en.wikipedia.org/wiki/Catalytic_converter

    A three-way catalytic converter on a gasoline-powered 1996 Dodge Ram Simulation of flow inside a catalytic converter. A catalytic converter is an exhaust emission control device which converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction.

  4. Exhaust system - Wikipedia

    en.wikipedia.org/wiki/Exhaust_system

    They work by transforming the polluted exhaust components into water and carbon dioxide. [6] There is a light-off temperature from which catalytic converters start to be efficient and work properly. [7] Catalytic converters can cause back pressure if clogged or not designed for the required flow rate. In these situations, upgrading or removal ...

  5. Lean-burn - Wikipedia

    en.wikipedia.org/wiki/Lean-burn

    The main drawback of lean-burning is that a complex catalytic converter system is required to reduce NOx emissions. Lean-burn engines do not work well with modern 3-way catalytic converter —which require a pollutant balance at the exhaust port so they can carry out oxidation and reduction reactions—so most modern engines tend to cruise and ...

  6. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    The catalytic converter is a device placed in the exhaust pipe, which converts hydrocarbons, carbon monoxide, and NO x into less harmful gases by using a combination of platinum, palladium and rhodium as catalysts. [16] There are two types of catalytic converter, a two-way and a three-way converter.

  7. 29-Year-Old in ‘Catatonic State’ After Rare Disorder Causes ...

    www.aol.com/lifestyle/29-old-catatonic-state...

    As the Cleveland Clinic explains, the disorder presents “with a range of neuropsychiatric symptoms” like Tarver experienced, and is commonly caused by a tumor.. However, the GoFundMe says ...

  8. High-dose proton radiation could shorten breast cancer ... - AOL

    www.aol.com/therapy-offers-promising-look-future...

    Proton beam therapy has been shown to be just as effective as traditional chemotherapy, with fewer side effects and less treatment time.

  9. Selective catalytic reduction - Wikipedia

    en.wikipedia.org/wiki/Selective_catalytic_reduction

    Catalytic converter, which also catalyzes NO x conversion but does not use urea or ammonia; Diesel exhaust fluid (DEF) or AdBlue; Exhaust gas recirculation versus selective catalytic reduction; Environmental engineering; Selective non-catalytic reduction (SNCR) NOx adsorber (LNT) Vehicle emissions control

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