BACKGROUND Most preclinical studies are carried out on mice. For internal dose assessment of a mouse, specific absorbed fraction (SAF) values play an important role. In most studies, SAF values are estimated using older standard human organ compositions and values for limited source target pairs. OBJECTIVE SAF values for monoenergetic photons of energies 15, 50, 100, 500, 1000 and 4000 keV we...

INTRODUCTION This review is related to the mechanism of development of radiation induced pneumonitis, its pathological, clinical and radiological features and therapy. The team treating cancer patients consists of radiation oncologists and oncologists, as well as general practitioners, pulmologists and radiologists for monitoring effects of therapy. Therefore, a different number of specialists ...

b[U-‘4Claspartate, L-[U-‘4C]asparagine, and L-[U-“‘Clarginine were administered luminally into isolated segments of rat jejunum in situ, and the radioactive products appearing in venous blood from the segment were identified and quantified, in a continuation of similar studies with L-glutamate and L-glutamine (Windmueller, H. G., and Spaeth, A. E. (1975) Arch. Biochem. Biophys. 171, 662-672). A...

2014 The effect of microwave radiation on the dc current-voltage characteristic of proximity effect bridges has been studied at frequencies of 10, 35 and 90 GHz. We report the properties of bridges fabricated in layered films of Nb and Ta. The fraction 03B5 of the incident radiant power absorbed by the bridge is measured calorimetrically, permitting determination of the intrinsic responsivity (...

The problem of diffusion with absorption and trapping sites arises in the theory of molecular signaling inside and on the membranes of biological cells. In particular, this problem arises in the case of spine-dendrite communication, where the number of calcium ions, modeled as random particles, is regulated across the spine microstructure by pumps, which play the role of killing sites, while th...

Purpose: Many theoretical models have been designed to predict exposure levels and absorbed doses under various exposure conditions. The aim of this report, however, is to obtain, through a practical method, a quantitative measure of the absorbed doses in patients undergoing routine X-ray examinations to various anatomical sites. Materials and Methods: Anatomical phantoms simulating patients’ e...

Gastrointestinal mucosal factors controlling rates of iron absorption were studied utilizing an in vivo closed duodenal loop technique. Cellular distribution of newly absorbed radioiron was identified by molecular sieve and iron-exchange chromatography of the mucosal cell supernate. In the normal animal, iron rapidly appeared in ferritin, and this fraction accounted for greater than 90% of muco...

This paper describes the results of radiation-induced crosslinking polysaccharides modified with hydroxypropyl and carboxymethyl functional groups, hydroxypropylcellulose (HPC) carboxymethylcellulose (CMC), respectively, without poly(ethylene glycol) diacrylate (PEGDA) as a agent, to obtain dual stimuli-responsive hydrogels. The gels were characterized in terms water uptake gel fraction, parame...

Great care is needed to obtain spectral data appropriate for phenotyping in a scientifically rigorous manner. This paper discusses the procedures and considerations necessary and also suggests important pre-processing and analytical steps leading to real-time, non-destructive assessment of crop biophysical characteristics. The system has three major components: (1) data-collection platforms (wi...