filter4dAbstract. The four-dimensional local ensemble transform Kalman filter (4D-LETKF) data assimilation system for the whole neutral atmosphere is updated to better representL-グルタミン 200 mM, solution, sterile-filtered, BioXtra, suitable for cell culture; CAS Number: 56-85-9; EC Number: 200-292-1; Synonyms: Glavamin,Levoglutamide at Sma-Aldrich