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  2. 4-Fluoromethylphenidate - Wikipedia

    en.wikipedia.org/wiki/4-Fluoromethylphenidate

    4-Fluoromethylphenidate was studied further along with other analogues of (±)-threo-methylphenidate (TMP) to assess their potential as anti-cocaine medications. 4F-MPH was reported as having an ED 50 mg/kg of 0.26 (0.18–0.36), regarding its efficacy as a substitute for cocaine, and a relative potency of 3.33 compared to methylphenidate for ...

  3. Simplification - Wikipedia

    en.wikipedia.org/wiki/Simplification

    Simplification is the process of replacing a mathematical expression by an equivalent one that is simpler (usually shorter), according to a well-founded ordering. Examples include:

  4. Heterogeneous water oxidation - Wikipedia

    en.wikipedia.org/wiki/Heterogeneous_Water_Oxidation

    2H 2 O → O 2 + 4H + + 4e − Oxidation (generation of dioxygen) 4H + + 4e − → 2H 2 Reduction (generation of dihydrogen) 2H 2 O → 2H 2 + O 2 Total Reaction Of the two half reactions, the oxidation step is the most demanding because it requires the coupling of 4 electron and proton transfers and the formation of an oxygen-oxygen bond.

  5. Stretched exponential function - Wikipedia

    en.wikipedia.org/wiki/Stretched_exponential_function

    But the expression is in general too complex to be useful except for the case β = 1/2 where = = / Figure 2 shows the same results plotted in both a linear and a log representation. The curves converge to a Dirac delta function peaked at u = 1 as β approaches 1, corresponding to the simple exponential function.

  6. MDMB-4en-PINACA - Wikipedia

    en.wikipedia.org/wiki/MDMB-4en-PINACA

    Adulterated Cannabis products in Europe that have been laced with MDMB-4en-PINACA have contained 0.3 to 4.6 μg/mg in seized flower samples and 1.7 to 7.2 μg/mg in hash/or other extract samples. [24] Adulterated Cannabis products in Italy that have been laced with MDMB-4en-PINACA have contained 0.4 up to 6.3 mg/g [25]

  7. 4F - Wikipedia

    en.wikipedia.org/wiki/4F

    4F correlator, in Fourier optics; The 4f electron shell; Section 4(f) of the United States DOT act of 1966, which regulates acquiring park and historic properties for transportation use. 4F case, a 4 February 2006 controversial criminal case in Barcelona; Flottille 4F a French naval aviation squadron; LMS Fowler Class 4F, a class of 0-6-0 steam ...

  8. List of designer drugs - Wikipedia

    en.wikipedia.org/wiki/List_of_designer_drugs

    An assortment of several designer drugs. Designer drugs are structural or functional analogues of controlled substances that are designed to mimic the pharmacological effects of the parent drug while avoiding detection or classification as illegal.

  9. Binary silicon-hydrogen compounds - Wikipedia

    en.wikipedia.org/wiki/Binary_silicon-hydrogen...

    hexasilane Si 6 H 14 or H 3 Si−SiH 2 −SiH 2 −SiH 2 −SiH 2 −SiH 3, 6 silicon atoms and 14 hydrogen atoms, analogous to hexane; Silanes are named by adding the suffix-silane to the appropriate numerical multiplier prefix. Hence, disilane, Si 2 H 6; trisilane Si 3 H 8; tetrasilane Si 4 H 10; pentasilane Si 5 H 12; etc.