THRESHOLD LIMIT VALUES
\θɹˈɛʃə͡ʊld lˈɪmɪt vˈaljuːz], \θɹˈɛʃəʊld lˈɪmɪt vˈaljuːz], \θ_ɹ_ˈɛ_ʃ_əʊ_l_d l_ˈɪ_m_ɪ_t v_ˈa_l_j_uː_z]\
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Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).
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Proto Oncogene Proteins c erbB 2
- cell surface protein-tyrosine kinase that is found to be overexpressed in significant number adenocarcinomas. It has extensive homology can heterodimerize EGF EPIDERMAL GROWTH FACTOR), 3 receptor (RECEPTOR, 3) and the 4 receptor. Activation of erbB-2 receptor occurs during heterodimer formation with a ligand-bound erbB family members. EC 2.7.11.-.