Scintillators have been widely used in radiation detection for almost one century. It has traditionally been used together with a photomultiplier tube (PMT) but in recent years silicon photomultipliers (SPM) has begun to compete with the PMT. This opens opportunities for new applications like pocket size dosimeters. The purpose of this thesis is to investigate the use of different scintillator ...

Suspended particulate matter (SPM) strongly alters the trophic environment of photosymbiotic aquatic organisms. At high particles loads, phototrophic energy gains can be diminished due to light absorption by suspended particles, and stress from particle abrasion or deposition on tissues. However, energy gains are enhanced if organisms are able to use SPM as a food source. For photosymbiotic ben...

Because of their important roles in mediating the stabilization and expression of p53, we hypothesized that high-risk genotypes of polymorphisms in p53-related genes, including p53, p73, p14(ARF), MDM2 and MDM4, may be associated with an increased risk of second primary malignancy (SPM) after index squamous cell carcinoma of the head and neck (SCCHN). We analyzed data from a cohort of 1283 pati...

To evaluate the risk of secondary primary malignancy (SPM) in patients with cervical cancer using a nationwide population-based dataset.Patients newly diagnosed with cervical cancer between 1997 and 2011 were identified using Taiwan's National Health Insurance database. Patients with antecedent malignancies were excluded. Standardized incidence ratios (SIRs) for SPM were calculated by comparing...

Electrons in a one-electron quantum dot were imaged in the Coulomb blockade regime at liquid He temperatures using a cooled scanning probe microscope (SPM). The SPM images are obtained by scanning a charged tip above the surface of the quantum dot and recording the conductance through the quantum dot in the Coulomb blockade regime as a function of tip position. The lowest energy level in the do...

Previous studies have shown an abnormality of the spermidine-to-spermine (Spd/Spm) ratio in whole blood of cystic fibrosis homo-and heterozygotes. To investigate Spd and Spm distribution amoung blood components as a possible cause of the abnormality, blood was fractionated using Rabinowitz's glass bead technique and Boyum's Ficoll-Hypaque method. Free (unconjugated) polyamines were extracted w...

Association of school absence with air pollution from suspended particulate matter (SPM) and nitrogen dioxide was analyzed in areas around arterial roads for five years, from 1993 to 1997. The prevalence of absence was calculated using the data for school absence in two schools around arterial roads, one of which is near a crossing (Sch.A), and the other is adjacent to an arterial road (Sch.B)....

The Sex comb on midleg (Scm) and polyhomeotic (ph) proteins are members of the Polycomb group (PcG) of transcriptional repressors. PcG proteins maintain differential patterns of homeotic gene expression during development in Drosophila flies. The Scm and ph proteins share a homology domain with 38% identity over a length of 65 amino acids, termed the SPM domain, that is located at their respect...

Background: Spontaneous pneumomediastinum (SPM) and subcutaneous emphysema are rare findings in children. Various etiologies have been reported for SPM, such as foreign body aspiration in infants, especially in those aged less than three years. In addition to the complications associated with foreign body aspiration, SPM may also become a life-threatening condition if left untreated. In the pre...