Highly dispersive strontium carbonate (SrCO3) nanostructures with uniform dumbbell, ellipsoid, and rod-like morphologies were synthesized in methanol solution without any additives. These SrCO3 were characterized by X-ray diffraction, field emission scanning electron microscopy, and N2 adsorption-desorption. The results showed that the reaction temperature and the methanol/water ratio had impor...

Novel kinetic models for both Dumbbell-like and rigid-rod like polymers are derived, based on the probability distribution function f(t, x, n, ṅ) for a polymer molecule positioned at x to be oriented along direction n while embedded in a ṅ environment created by inertial effects. It is shown that the probability distribution function of the extended model, when converging, will lead to well acc...

We report a case of a purely epidural capillary hemangioma of the thoracic spine with foraminal extension. Epidural hemangiomas are rare; only a few cases of dumbbell-shaped ones have been reported, and all were cavernous. MR imaging showed characteristic findings of a capillary hemangioma, which are also consistent with other epidural lesions such as neuromas or meningiomas.

We have demonstrated that fibrillar aggregates formed from the self-assembly of a dumbbell-shaped rod amphiphile undergo a reversible chiral-non-chiral transition triggered by temperature.

A square split-ring resonator (SRR) defected ground structure (DGS) is studied in this paper. This DGS structure has a flat low-pass characteristic and a sharp band-gap property compared to the conventional dumbbell DGS. A detailed analysis of the relationship between the transmission characteristic and the split-ring dimension is made. In order to enhance the out-band suppression, an improved ...

BACKGROUND Due to their important size and complex localization, the management of thoracic dumbbell tumors is challenging, frequently requiring the need for an anterior approach. Our study aims to first report the feasibility and safety of a single-stage posterior minimally invasive procedure in achieving complete resection of voluminous thoracic dumbbell tumors. METHODS We retrospectively r...

A 76-year-old woman presented with a 3-year history of intermittent and worsening right upper quadrant abdominal pain. The abdominal pain was not associated with nausea or vomiting, and did not get worse with food intake. Laboratory results were normal. Abdominal computed tomography (CT) showed a 2.3 x 1.9-cm fluid-filled lesion of the biliary system consistent with a type II choledochal cyst, ...

We study how crowding affects the activity and catalysis-enhanced diffusion of enzymes passive tracers by employing a fluctuating-dumbbell model conformation-changing enzymes.

Backgrounds: Bilateral pulmonary artery banding (bPAB) followed by ductal stenting has been reported as a stage 1 palliation of hypoplastic left heart syndrome (HLHS). However, hybrid strategy, which includes median sternotomy for bPAB, has been a common approach. In this preliminary experiment, we investigated the feasibility of a transcatheter bPAB followed by debanding using a reexpandable c...

The author has recently reviewed the literature on the organization and behavior of the bacterial nucleus (Knaysi, 1951). Since then the situation has been confused by claims (DeLamater, Hunter, and Mudd, 1952) that the organization and behavior of the bacterial nucleus are identical to the organization and behavior of nuclei in the cells of higher animals. These claims have not been confirmed ...