A 42-year-old woman was admitted to the hospital because of odynophagia and neck pain after swallowing a piece of bone. Anteroposterior (AP) and lateral neck X-ray showed the foreign body. Rigid esophagoscopy under general anesthesia was performed and foreign body extracted by rigid bronchoscopy.

China possesses a vast territory, and the manual harvesting of blueberries is time-consuming labor-intensive. Due to planting agronomy differences in other countries, needs develop domestic blueberry harvester realize mechanical harvesting. In process, “collision” core problem. Most literature has studied rigid body–rigid body collision, while few authors have rigid–flexible coupling collision ...

Rolling contact experimentation is a viable and instructive method for exploring the adhesive between surfaces. When applied to soft elastomeric or engineered surfaces, results of such experiments can provide insights relevant medical robotics, gripping applications, reversible dry adhesives bandages wearable devices. We have designed built tribometric device capture normal tangential forces ro...

introduction: hepatitis c virus (hcv) is the major cause of acute and chronic hepatitis, cirrhosis, and hepatocellular carcinoma worldwide. because of increasing number of infected patients throughout the world, various studies are concentrated on development of high quality diagnostic tests and genotyping in various regions of the world. methods: in this study, we used rt-pcr to isolate and a...

Nanofibrous glass/ceramic rigid shapes with uncommon structures, consisting of electrospun vitreous silica nanofibers coated 5–30 nm thick Al2O3 or MgAl2O4 ceramic layers, were fabricated in this study. Ceramic nanolayers restricted the viscous flow and provided strong structural bonding during partial sintering at 1200 °C. The interface interactions between nanofiber core nanolayer defined res...

Several series of novel banana-shaped H-bonded symmetric trimers (with two H-bonds) and asymmetric heterodimers (with one H-bond) were self-assembled by appropriate molar ratios of proton donors (H-donors) and acceptors (H-acceptors). The influences of H-bonded linking positions and aromatic ring numbers (4-8 aromatic rings in the rigid cores) as well as the chain lengths (n, m = 12 or 16, resp...