Amino acid analysis

The process and apparatus for qualitative and quantitative analysis of the amino acid content of a biological sample are presented. The sample is deposited on a cation exchange resin and then is washed with suitable solvents. The amino acids and various cations and organic material with a basic function remain on the resin. The resin is eluted with an acid eluant, and the eluate containing the amino acids is transferred to a reaction vessel where the eluant is removed. Final analysis of the purified acylated amino acid esters is accomplished by gas-liquid chromatographic techniques

Performance prediction of point-based three-dimensional volumetric measurement systems

Point-based three-dimensional volumetric measurement systems are defined as multi-view vision systems which reconstruct a three-dimensional scene by first identifying key points on the views and then performing the reconstruction. Examples of these are defocusing digital particle image velocimetry (DDPIV) (Pereira et al 2000 Exp. Fluids 29 S78–84) and 3D particle tracking velocimetry (3DPTV) (Papantoniou and Maas 1990 5th Int. Symp. on the Application of Laser Techniques in Fluid Mechanics) which reconstruct clouds of flow tracers in order to estimate flow velocities. The reconstruction algorithms in these systems are variations of an epipolar line search. This paper presents a generalized error analysis of such methods, both in reconstruction precision (error in the reconstructed scene) and reconstruction quality (number of ambiguities or 'ghosts' produced)

Fundamentals of the oxidation protection of columbium and tantalum Semiannual report, Apr. 1 - Oct. 1, 1967

Oxidation protection of niobium and tantalum by their silicide

Fundamentals of the oxidation protection of columbium and tantalum Semiannual report, 1 Apr. - 1 Oct. 1969

Oxidation protection by silicides of niobium and tantalum, and thermochemical dat

Fundamentals of the oxidation protection of tantalum Final report

Fundamentals of oxidation protection of tantalum by silicide

Compressible Flows in Fluidic Oscillators

We present qualitative observations on the internal flow characteristics of fluidic oscillator geometries commonly referred to as sweeping jets in active flow control applications. This is part of the fluid dynamics videos.Comment: Videos include

Impact resistance of spar-shell composite fan blades

Composite spar-shell fan blades for a 1.83 meter (6 feet) diameter fan stage were fabricated and tested in a whirling arm facility to evaluate foreign object damage (FOD) resistance. The blades were made by adhesively bonding boron-epoxy shells on titanium spars and then adhesively bonding an Inconel 625 sheath on the leading edge. The rotating blades were individually tested at a tip speed of 800 feet per second. Impacting media used were gravel, rivets, bolt, nut, ice balls, simulated birds, and a real bird. Incidence angles were typical of those which might be experienced by STOL aircraft. The tests showed that blades of the design tested in this program have satisfactory impact resistance to small objects such as gravel, rivets, nuts, bolts, and two inch diameter ice balls. The blades suffered nominal damage when impacted with one-pound birds (9 to 10 ounce slice size). However, the shell was removed from the spar for a larger slice size

The Presidential Succession Act at 75 | Continuity of Government Efforts

These remarks were delivered as part of the program entitled The Presidential Succession Act at 75: Praise It or Bury It?, which was held on April 6, 2022, and hosted by the Fordham University School of Law. The Presidential Succession Act sets out the presidential line of succession and other procedures for situations in which the president and vice president have both died, resigned, been removed, or become unable to discharge the presidency’s powers and duties. The Act also addresses succession scenarios before Inauguration Day. In light of the statute’s seventy-fifth anniversary, this program explored relevant history and analyzed whether reform to the statute is needed. In these remarks, journalist and historian Garrett Graff analyzes how the Presidential Succession Act of 1947 fits in with broader continuity-of-government efforts