N NAA

Amid-Thin (naphthalene acetamide) is labeled Danger because of the potential of severe irreversible eye damage, whereas Fruitone N, NAA 800, and Tree-Hold Sprout Inhibitor (NAA) are relatively nontoxic (Category III). See Table 5.28 for a listing of commercial products. 

P-Naphthaleneacetic Acid (NAA) Fruitone N, NAA 800, Tree-Flold Sprout Inhibitor... 

H. Mandel and N. Ewbank, Critical Constants of Diphenyl and Eerphenyl, Report No. NAA-SR-5129, Atomics International, Canoga Parks, Calif., Dec. 1960, p. 18. 

NAA based upon fast neutron-induced reactions has also been intensively utilized. This technique is applied to systems which produce radionuclides by the general reaction A(n, q)B,... 

This NAA technique is based on the nuclear reactions 23Na(n,7)24Na and 41K(n/y)42K. Half-lives of the activated products are 15.0 hrs and 12.4 hrs, respectively. For Na analysis, the samples were irradiated in a specially designed thermal column to suppress the fast neutron reaction of 27Al(n,a)24Na which interferes with the reaction for Na. For K analysis, the proplnt samples were irradiated at a standard irradiation position of the reactor. For the Na irradiations, the neutron flux in the thermal column was in the order of 1010, whereas for the K assays it was approx 1012 neutrons/cm2-sec... 

Thermal neutron activation was selected for the radioassay via the soTi(n,7)s 1 Ti reaction. Since the half-life of 51Ti was 5.8 min, nondestructive NAA by gamma-ray spectrometry was used in lieu of chem sepn of Ti... 

The NAA measurements on the paper samples were made at the Breazeale Nuclear Reactor Facility at the Pennsylvania State University with a TRIGA Mark III reactor at a flux of about 1013 n/cm2-sec. Samples were irradiated from 2 to 20 min and counted for 2000 sec, after a 90 min decay time for Ba and a 60 hr decay for Sb, Analyses were performed instrumentally, without radiochemical separation, using a 35cm3 coaxial Ge-Li detector and a 4096-channel pulse height analyzer. With these procedures, detection limits for Ba and Sb were 0.02ug and 0.001 ug, respectively. These sensitivities are comparable to those obtained by GA s radiochemical separation procedure, and are made possible by the use of the higher neutron output from the more powerful reactor and in combination with the higher resolution solid state detector... 

Early neuronal damage detected by immunohistochemistry has been confirmed by brain magnetic resonance spectroscopy (MRS) analysis of the neuronal marker N-acetylaspartate (NAA) (commonly expressed as an NAA/creatine ratio NAA/ Cr) in the acute and chronic phases of infection in SIV-infected macaques (Fuller et al. 2004 Greco et al. 2004 Lentz et al. 2005 Lentz et al. 2008 Williams et al. 2005). In a macaque model involving CD8h- T lymphocyte depletion along with SIV inoculation, Williams et al. (2005) demonstrated a reduction in NAA/Cr in the... 

Associative copolymers of acrylamide with N-alkylacrylamides, terpoly-mers of acrylamide, N-decylacrylamide, and sodium-2-acrylamido-2-methyl-propane sulfonate (NaAMPS), sodium acrylate (NaA), or sodium-3-acrylamido-3-methylbutanoate (NaAMB) have been shown to possess the required rheologic behavior to be suitable for enhanced oil-recovery processes [1184]. 

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