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  2. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    In the United States, response codes are used to describe a mode of response for an emergency unit responding to a call. They generally vary but often have three basic tiers: Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with emergency lights, but without sirens. Alternatively, sirens may be used if necessary ...

  3. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.

  4. 2,5-Dihydroxy-1,4-benzoquinone - Wikipedia

    en.wikipedia.org/wiki/2,5-Dihydroxy-1,4-benzoquinone

    2,5-Dihydroxy-1,4-benzoquinone or 2,5-dihydroxy-para-benzoquinone is an organic compound with formula C 6 H 4 O 4, formally derived from 1,4-benzoquinone by replacing two hydrogen atoms with hydroxyl (OH) groups. It is one of seven dihydroxybenzoquinone isomers. It is a yellow solid [1] with planar molecules [2] that exhibits ferroelectric ...

  5. List of SMTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SMTP_server_return...

    X.3.XXX Mail System Status. X.4.XXX Network and Routing Status. X.5.XXX Mail Delivery Protocol Status. X.6.XXX Message Content or Media Status. X.7.XXX Security or Policy Status. The meaning of the "detail" field depends on the class and the subject, and are listed in RFC 3463 and RFC 5248 . A server capable of replying with an Enhanced Status ...

  6. 2,3-diketo-5-methylthiopentyl-1-phosphate enolase - Wikipedia

    en.wikipedia.org/wiki/2,3-diketo-5-methylthio...

    2,3-diketo-5-methylthiopentyl-1-phosphate enolase (EC 5.3.2.5, DK-MTP-1-P enolase, MtnW, YkrW, RuBisCO-like protein, RLP) is an enzyme with systematic name 2,3-diketo-5-methylthiopentyl-1-phosphate keto-enol-isomerase. This enzyme catalyses the following chemical reaction

  7. 2,5-Furandicarboxylic acid - Wikipedia

    en.wikipedia.org/wiki/2,5-Furandicarboxylic_acid

    2,5-Furandicarboxylic acid (FDCA) is an organic chemical compound consisting of two carboxylic acid groups attached to a central furan ring. It was first reported as dehydromucic acid by Rudolph Fittig and Heinzelmann in 1876, who produced it via the action of concentrated hydrobromic acid upon mucic acid. [ 2]

  8. Hexane-2,5-dione - Wikipedia

    en.wikipedia.org/wiki/Hexane-2,5-dione

    The chronic toxicity of hexane is attributed to hexane-2,5-dione. The symptoms are tingling and cramps in the arms and legs, followed by general muscular weakness. In severe cases, atrophy of the skeletal muscles is observed, along with a loss of coordination and vision problems. [ 2]

  9. 2,5-Diphenyloxazole - Wikipedia

    en.wikipedia.org/wiki/2,5-Diphenyloxazole

    2,5-Diphenyloxazole ( PPO) is an organic scintillator. [2] It is used as a wavelength shifter (also called a "primary shifter" or "fluor"), which means that it converts shorter wavelength light to longer wavelength light. Its output spectrum peaks at 385 nm, which is in the range of UV light .