| Photofrin |
A drug used in photodynamic therapy that is absorbed by tumor cells. When absorbed by cancer cells and exposed to light, photofrin becomes active and kills the cancer cells.
출처: www.stjude.org/glossary
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| photosynthesis |
Process by which cells containing chlorophyll in green plants convert incident light to chemical energy and synthesize organic compounds from inorganic compounds, especially carbohydrates from carbon dioxide and water, accompanied by the simultaneous release of oxygen.
출처: amsglossary.allenpress.com/glossary/browse
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| photochemical |
Type of air pollution characterized by high levels of ozone and low visibility, typically found in cities located in a valley (eg, Los Angeles, Denver, Mexico City). Sunlight, oxides of nitrogen, and hydrocarbons (the latter two of which arise from automobile exhaust) are all required in order for smog formation to occur. The most severe episodes occur when a strong temperature inversion caps the location and traps the pollutants. ...
출처: amsglossary.allenpress.com/glossary/browse
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| photochemical smog |
Air contaminated with ozone, nitrogen oxides, and hydrocarbons, with or without natural fog being present. In the presence of sunlight, hydrocarbons and NO x are involved in a complex series of chemical reactions that eventually creates ozone and other oxidants as secondary pollutants. However, ozone is also destroyed by NO x . ...
출처: amsglossary.allenpress.com/glossary/browse
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| photochemistry |
The study of the chemical and physical changes occurring when a molecule or atom absorbs light. These can include photodecomposition, fluorescence, chemiluminescence, and quenching of the excited state. The atmosphere can be considered as a complex photochemical reactor, the chemistry of which is driven by the visible and ultraviolet radiation emanating from the sun.
출처: amsglossary.allenpress.com/glossary/browse
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