Synthesis of novel 225Ac-Sn particles was described for the first time. Detailed experimental and stability studies were successfully exhibited. Treatment excess amount SnCl2 with 0.2 mCi 225Ac furnished highly stable tin colloid 90% radiochemical yield (RCY) at optimized reaction condition. R-TLC analyses indicated 95% purity (RCP). Stability showed that colloidal structure also retained free ...

Electrical transport measurements were made on single-crystal Sn nanowires to understand the intrinsic dissipation mechanisms of a one-dimensional superconductor. While the resistance of wires of diameter larger than 70 nm drops precipitously to zero at Tc near 3.7 K, a residual resistive tail extending down to low temperature is found for wires with diameters of 20 and 40 nm. As a function of ...

[1] This contribution reviews recent findings that illuminate the processes governing colloid retention in porous media under environmentally relevant conditions. In the environment, colloids act as conveyors of contaminants, or even as contaminants themselves; however, despite decades of research, we are unable to accurately predict the retention of colloids in granular aquifer media under env...

Soil and aquifer materials have a finite capacity for colloid retention. Blocking of the limited number of available retention sites further decreases the rate of retention with time and enhances risks (e.g., pathogens or colloid-associated contaminants) or benefits (e.g., remediation by microorganisms or nanoparticles) of colloid migration. Our objective was to use a straightforward procedure,...

Twenty patients with blunt abdominal trauma were diagnosed as having splenic rupture by Tc-99m sulfur colloid scintigraphy. Because of the increased risk of infection in children following splenectomy, surgery was not performed and scintigraphic followup of the injured spleens was carried out. Thirteen patients were scanned at least 2 mo after trauma and the longest followup was 1 yr. Only thre...

A 7-month-old girl with history of persistent left chylous pleural effusion was referred for lymphoscintigraphy. A previous chest computed tomography (CT) scan demonstrated a small to moderate-sized left pleural effusion but could not identify the lymphatic leakage site. Lymphoscintigraphy using filtered Tc sulfur colloid showed minimal focal activity in the lower chest. A correlative single-ph...

A 7-month-old girl with history of persistent left chylous pleural effusion was referred for lymphoscintigraphy. A previous chest computed tomography (CT) scan demonstrated a small to moderate-sized left pleural effusion but could not identify the lymphatic leakage site. Lymphoscintigraphy using filtered (99m)Tc sulfur colloid showed minimal focal activity in the lower chest. A correlative sing...

Objective: The purpose of this study was to retrospectively evaluate microwave heating preparations of "'Tc-sulfur colloid during a 4-wk period. Methods: The mTc-SC kit preparation was performed according to the package insert with microwave heating modifications. Results: During the first 2 wk, patient studies (n = 14) showed excellent images, however during the last 2 wk patient studies (n = ...

Colloid cysts represent between 0.25-1 % of intracranial tumors [1-3]. Although most frequently located in the third ventricle, they are also found throughout the ventricular system [4]. Extraventricular location is rare [5]. We describe a case of a neuroepithelial cyst located in the craniocervical region, which was examined by CT and vertebral angiography, with subsequent biochemical study of...