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  2. Hierarchy of hazard controls - Wikipedia

    en.wikipedia.org/wiki/Hierarchy_of_hazard_controls

    The system is not based on evidence of effectiveness; rather, it relies on whether the elimination of hazards is possible. Eliminating hazards allows workers to be free from the need to recognize and protect themselves against these dangers. Substitution is given lower priority than elimination because substitutes may also present hazards.

  3. Engineering controls - Wikipedia

    en.wikipedia.org/wiki/Engineering_controls

    Traditionally, a hierarchy of controls has been used as a means of determining how to implement feasible and effective controls, which typically include elimination, substitution, engineering controls, administrative controls, and personal protective equipment. Methods earlier in the list are considered generally more effective in reducing the ...

  4. Hazard substitution - Wikipedia

    en.wikipedia.org/wiki/Hazard_substitution

    Substitution is the second most effective of the five members of the hierarchy of hazard controls in protecting workers, after elimination. [1] [2] [3] Substitution and elimination are most effective early in the design process, when they may be inexpensive and simple to implement, while for an existing process they may require major changes in ...

  5. Job safety analysis - Wikipedia

    en.wikipedia.org/wiki/Job_safety_analysis

    A job safety analysis (JSA) is a procedure that helps integrate accepted safety and health principles and practices into a particular task or job operation.The goal of a JSA is to identify potential hazards of a specific role and recommend procedures to control or prevent these hazards.

  6. Physical hazard - Wikipedia

    en.wikipedia.org/wiki/Physical_hazard

    A nail gun-related injury. Machines are commonplace in many industries, including manufacturing, mining, construction and agriculture, [11] and can be dangerous to workers. . Many machines involve moving parts, sharp edges, hot surfaces and other hazards with the potential to crush, burn, cut, shear, stab or otherwise strike or wound workers if used unsafely

  7. Elimination reaction - Wikipedia

    en.wikipedia.org/wiki/Elimination_reaction

    E1 is a model to explain a particular type of chemical elimination reaction. E1 stands for unimolecular elimination and has the following specifications It is a two-step process of elimination: ionization and deprotonation. Ionization: the carbon-halogen bond breaks to give a carbocation intermediate. deprotonation of the carbocation.

  8. Cross-coupling reaction - Wikipedia

    en.wikipedia.org/wiki/Cross-coupling_reaction

    In such cases, the mechanism generally involves reductive elimination of R-R' from L n MR(R') (L = spectator ligand). This intermediate L n MR(R') is formed in a two-step process from a low valence precursor L n M. The oxidative addition of an organic halide (RX) to L n M gives L n MR(X).

  9. Chemical reaction - Wikipedia

    en.wikipedia.org/wiki/Chemical_reaction

    Because of the similar conditions and reagents, the E2 elimination is always in competition with the S N 2-substitution. [52] Electrophilic addition of hydrogen bromide. The counterpart of elimination is an addition where double or triple bonds are converted into single bonds.

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