Low counting experiments (search for double β decay and dark matter particles, measurements of neutrino fluxes from different sources, search for hypothetical nuclear and subnuclear processes, low background α, β, γ spectrometry) require extremely low background of a detector. Scintillators are widely used to search for rare events both as conventional scintillation detectors and as cryogenic s...

Everybody talks about the atom, but few have more than a Sunday supplement knowledge of the simpler aspects of nuclear phenomena. The author, M.D. and Ph.D., and a member of the staff at Brookhaven, treats the story of the atom from its earliest historical conceptions to its possibilities in future war and peace. The style is of the simplest; no previous familiarity with mathematics or physics ...

Neuronal uptake (Uptake-1) of the sympathetic neurotransmitter norepinephrine from the circulation in the human heart was assessed in vivo with three techniques. 1) Cardiac removal of intravenously infused tracer-labeled norepinephrine was measured before and after Uptake-1 blockade with desipramine; 2) the difference between the fractional extraction of radioactive norepinephrine and of radioa...

ESTIMATION of cardiac output by the indicator-dilution method has been described by Kinsman, Moore, and Hamilton1 utilizing dye; however, radioactive methods for determination of cardiac output owe their inception to Prinzmetal and co-workers,2 who recorded radioactivity as a function of time by means of a counter over the heart after an intravenous injection of radioactive Na24. Nylin and Cela...

Radioactive waste from different sectors such as nuclear energy, health care and food has become a discernible part of our environment. Several dumping methods are in routine practice to dispose radioactive wastes. Huge chemical and energy input in various skillful physico-chemical methods has limited their use while biological methods exploring the potential of micro-organisms could be a promi...

ATHEROSCLEROSIS and its accompany18x ing vascular lipoidosis has been linked to an inborn error in fat metabolism. The observations that atheroselerosis and hypercholesterolemia frequently coexist,l 2 that both can be produced in animals following cholesterol feedings,3 and that atherosclerosis is unusual when people eat little animal fat, favor this concept.4-5 The unusual physical state and t...

This paper describes the activities in Application Level Active Networks (ALAN) under the DARPA-funded RADIOACTIVE Project; this is closely related to work carried out under a European Commission project ANDROID. The ALAN infrastructure was developed mainly under other projects; it is summarized here mainly for background. The version used here relies on separate Active Applications driven by p...

Knowledge of the potential dangers of exposure to radioactive substances and the insti tution of proper safety precautions have helped to reduce accidental exposures to radioactive substances. However, the carcinogenic hazard from them has by no means been eliminated, and, in spite of the exercise of reasonable care and the use of improved technics, accidents in the laboratory and indust ry may...

Radioactive contamination is the result of regular operation of nuclear power plants, leakage or accident during the production, or use of radionuclides (radioisotopes). They occur throughout the nuclear fuel cycle and continue to give off harmful radioactive particles and rays for very protracted periods. Radioactive elements can contaminate water adversely affecting human health as well as aq...

Introduction: Earlier studies suggest increased serum levels of thyroid peroxidase antibodies (TPOAb) in some cases with non-autoimmune hyperthyroidism. The aim of the study was to assess the incidence of hypothyroidism in patients with nodular toxic goitre and toxic adenoma at 12 months after radioactive iodine therapy in the relation to TPOAb levels. Patients & Measurements: The study compris...