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The Stratospheric Observatory for Infrared Astronomy (SOFIA) has recently concluded a set of engineering flights for Observatory performance evaluation. These in-flight opportunities are viewed as a first comprehensive assessment of the Observatory's performance and are used to guide future development activities, as well as to identify additional Observatory upgrades. Pointing stability was evaluated, including the image motion due to rigid-body and flexible-body telescope modes as well as possible aero-optical image motion. We report on recent improvements in pointing stability by using an active mass damper system installed on the telescope. Measurements and characterization of the shear layer and cavity seeing, as well as image quality evaluation as a function of wavelength have also been performed. Additional tests targeted basic Observatory capabilities and requirements, including pointing accuracy, chopper evaluation and imager sensitivity. This paper reports on the data collected during these flights and presents current SOFIA Observatory performance and characterization., Comment: 13 pages, 13 figure, and 2 tables; accepted by ApJS

The specific peroxidase (1.11.1.7) and phenoloxidase (1.10.3.1) activities are quantitatively measured during the life of Coleus, from germination until flowering. In most organs investigated, the peroxidase activity increases rapidly with growth while the phenoloxidase activity remains low. The latter activity is higher in root apices than in more differentiated regions of roots. From the results obtained it may be concluded that the phenoloxidase activity accompanies cellular proliferation. It is suggested that the peroxidase activity plays an indirect role in root initiation through its role in cellular differentiation.

Summary. — Crude extracts of Coleus show great phenoloxidase and peroxidase activities. These extracts, when purified by acetone, lose their phenoloxidase activity, keep their peroxidase activity, and acquire an auxin-oxidase activity, by elimination of the inhibi¬ tors of the reaction., Résumé. — Des extraits bruts de Coleus manifestent de fortes activités phénoloxydasique et peroxydasique. Ces mêmes extraits, purifiés par l'acétone, perdent leur activité phénoloxydasique, conservent leur activité peroxydasique et acquièrent une activité auxine-oxydasique, par élimination des inhibiteurs de cette réaction., Kaminski Charles. Phénoloxydases, peroxydases et acide β-indolyl-acétique-oxydases chez Coleus blumei. In: Bulletin de la Classe des sciences, tome 52, 1966. pp. 147-151.