Laser spectroscopy of the [Formula: see text], [Formula: see text] transitions in stored and cooled relativistic C[Formula: see text] ions.

The [Formula: see text] and [Formula: see text] transitions in Li-like carbon ions stored and cooled at a velocity of [Formula: see text] in the experimental storage ring (ESR) at the GSI Helmholtz Centre in Darmstadt have been investigated in a laser spectroscopy experiment. Resonance wavelengths were obtained using a new continuous-wave UV laser system and a novel extreme UV (XUV) detection system to detect forward emitted fluorescence photons. The results obtained for the two transitions are compared to existing experimental and theoretical data. A discrepancy found in an earlier laser spectroscopy measurement at the ESR with results from plasma spectroscopy and interferometry has been resolved and agreement between experiment and theory is confirmed.

Sirona CEREC Blocs and inCoris.

Unfortunately, there is no such thing as a universal material for every application--neither in engineering nor in dentistry. Instead, it is a matter of selecting the right material for each individual case and deploying this material in the appropriate way. For this reason, Sirona Dental Systems has decided to augment the existing product portfolio of its material suppliers (Vita Zahnfabrik and Ivoclar Vivadent) and has launched its own range of ceramics for chairside applications, as well as for the fabrication of crowns and bridges in dental laboratories.

[Mucoepidermoid carcinoma of the stomach]. / Das mukoepidermoide Magenkarzinom.

A case report is given of a 65 year old female patient harboring a rare mucoepidermoid carcinoma of the stomach. On X-ray examination a smooth faced mass with a diameter of 3 cm was found in the corpus region of the stomach. During gastroscopy the tumor was seen to be localized in the lower third of the stomach close to the lesser curvature with an ulceration on top. On microscopic examination a cornified squamous cell carcinoma was found including interspersed mucilaginous adenocarcinoma tissue. Prognosis of mucoepidermoid carcinoma is bad, histogenesis controversial. Discussion of this case as well as of other unusual adenocarcinomas for example with trophoblastic differentiation has to include the possibility of bidirectional development of undifferentiated stem cells. However it still remains unclear, why such tumors of the stomach are almost always adenocarcinomas and not signet ring cell carcinoma.

[Solitary polypoid cavernous hemangioma in the jejunum]. / Solitäres polypöses kavernöses Hämangiom im Jejunum.

Hemangiomas of the small intestine are rare. A case report is given of a 77 year old patient with upper gastrointestinal bleeding. Selective arteriography of the art. mesenterica superior revealed a convoluted mass of 1 cm diameter in the arciform arterial segment of a jejunal artery. The jejunal loop affected was removed and end-to-end anastomosis of the small intestine was performed; on histological examination a solitary polypoid cavernous hemangioma with a diameter of 6 mm was found. The patient is doing well 2 1/4 years after surgery.