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__NOTOC__ PNA or Pna has a variety of meanings: ==Science and Engineering== * abbreviation for orchid genus ''Paphinia'' * 4-Nitroaniline - chromogenic substrate, also known as para-Nitroaniline * Pacific–North American teleconnection pattern, a climatic phenomenon * Parisiensia Nomina Anatomica - the revision of anatomic nomenclature. * Peanut agglutinin, a lectin specific for Gal-β(1-3)-GalNAc * Peptide nucleic acid, an artificially synthesized polymer similar to DNA or RNA. * Plastic neutral axis, an engineering value for plastic material. * Polynuclear Aromatic Hydrocarbons, more commonly: Polycyclic aromatic hydrocarbons (PAHs) * Programmable Network analyzer (electrical) * Protected Natural Area (disambiguation) * Pottery Neolithic A, a division of the Pottery Neolithic period in archaeology 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「PNA」の詳細全文を読む スポンサード リンク
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