background: the heterogeneous composition of the human body presents numerous tissue types and cavities with widely differing radiologic properties. the aim of the present work was to develop a low cost homogeneous and heterogeneous phantom and the absorbed dose were measured by ionization chamber for different radiotherapy treatment techniques and compared with treatment planning system absorb...

fe3o4 magnetic nanoparticles were synthesized by co-precipitation of fe2+ and fe3+ in aqueous naoh. then silica was coated on the obtained nanoparticles and the whole composite was functionalized with chlorosulfonic acid in ch2cl2. the obtained nanocomposite (fe3o4@sio2-so3h) was characterized by ft-ir, vsm and xrd techniques and was used as an efficient catalyst in condensation reaction of ind...

It is difficult to isolate rare, PCR-quality DNA from specimens containing large quantities of nonspecific DNA from multiple sources (heterogeneous DNA). Extracting human DNA from stool for colorectal cancer (CRC) screening tests exemplifies this technically challenging sample preparation problem. The stool matrix is complex, the DNA composition heterogeneous, and CRC-associated mutated DNA is ...

C. J. Rose, J. P. O'Connor, C. Roberts, G. A. Buonaccorsi, Y. Watson, S. Cheung, G. Jayson, and G. J. Parker Imaging Science and Biomedical Engineering, The University of Manchester, Manchester, United Kingdom, The University of Manchester Biomedical Imaging Institute, Manchester, United Kingdom, Cancer Research UK and University of Manchester Department of Medical Oncology, The Christie Hospit...

The present study used latent class analysis to identify patterns of externalizing symptoms in a predominantly Hispanic sample of clinic referred anxious youth (N=224; 6-16 years; 54% males) and their parents. Findings revealed that the sample of youth could be classified into three distinct classes: (1) High Externalizing, (2) Moderate Externalizing, and (3) Low Externalizing. The High Externa...

heterogeneous catalytic hydrogenation of cyclohexene, catalyzed by pt/a1203, was carried out in thirteenvarious solvents (four alcoholic solvents, six aprotic polar solvents and three non polar solvents) at 25 °c.single-parameter correlations of logk vs. normalized polarity parameter (etn), hydrogen-bond acceptorbasicity (p), hydrogen-bond donor acidity (a) and dipolarity/polarizibility (it*) d...