Phenology is the study of recurring plant and animal life cycle stages, or phenophases, such as leafing and flowering of plants, maturation of agricultural crops, emergence of insects, and migration of birds. Many of these events are sensitive to climatic variation and change, and are simple to observe and record.
Polychlorinated biphenyls (PCBs) are a group of manmade chemicals. They are oily liquids or solids, clear to yellow in color, with no smell or taste. PCBs are very stable mixtures that are resistant to extreme temperature and pressure.
NMB (USA), Inc. NMB (USA) Inc. is the headquarters for Minebea's North American Group of Companies. The holding company was created in 1984 to manage Minebea's United States subsidiaries, NMB Technologies Corporation and New Hampshire Ball Bearings, Inc. (NHBB). These NMB (USA) Inc. companies are supported by the world-wide manufacturing capabilities of Minebea Co., Ltd.