["X-ray diagnostics - discipline-bound skeleton" and "magnetic resonance imaging - discipline-bound". Attempt at analysis of the achieved and the achievable].

The presently valid regulation for professional advanced training from the year 2003 has already experienced much discussion about its meaningfulness and practicality. One of the essential changes for physicians active in discipline 6 (surgery) is the reform of X-ray analysis as specialist supplementary training. The discipline orthopedics and trauma surgery is particularly dependent on the application of economical diagnostics and therapy control with conventional X-ray imaging as well as modern computed tomography and magnetic resonance imaging.

Stereoselective preparation of six diastereomeric quatercyclopropanes from bicyclopropylidene and some derivatives.

Diastereomeric meso- and d,l-bis(bicyclopropylidenyl) (5) were obtained upon oxidation with oxygen of a higher-order cuprate generated from lithiobicyclopropylidene (4) in 50 and 31 % yield, respectively. Their perdeuterated analogues meso-[D(14)]- and d,l-[D(14)]-5 were obtained along the same route from perdeuterated bicyclopropylidene [D(8)]-3 (synthesized in six steps in 7.4 % overall yield from [D(8)]-THF) in 20.

Radical cations from dicyclopropylidenemethane and its octamethyl derivative.

The radical cations of dicyclopropylidenemethane (2) and its octamethyl derivative (2-Me8) are prone to rearrangements into those of (2-methylallylidene)cyclopropane (2a) and its octamethyl derivative (2a-Me8), respectively, by opening one three-membered ring. In contrast to the radical cations of bicyclopropylidene (1) and its octamethyl derivative (1-Me8), 2*+ and 2-Me8*+ are stable to opening of the second ring, because in this case the resulting species would be a non-Kekulé hydrocarbon with a quartet ground state. Similarly to 1, octamethyl substitution in 2 promotes the tendency to rearrangement.

Distribution of bone mineral density with age and gender in the proximal tibia.

Objective: To investigate both the age and gender related distributions of bone mineral density in the proximal tibia, specifically in aged patients.

Background: For surgeons to achieve stable long-term fixation of implants in the proximal tibia, the distribution of bone mineral density must first be known. The changes that occur due to age or gender can alter these distributions.

Effects of Celebrex and Zyflo on liver metastasis and lipidperoxidation in pancreatic cancer in Syrian hamsters.

Selective inhibition of eicosanoid synthesis is thought to have effects on carcinogenesis in lung and colon cancer. However, it is still unknown whether pancreatic cancer might also be influenced. Therefore we evaluated the impact of selective cyclooxygenase-2 inhibitor Celebrex and selective 5-lipoxygenase inhibitor Zyflo on liver metastasis in a solid model of pancreatic adenocarcinoma in Syrian hamster.

Spirocyclopropanated bicyclopropylidenes: straightforward preparation, physical properites, and chemical transformations.

Perspirocyclopropanated bicyclopropylidene (6) was prepared in three steps from 7-cyclopropylidenedispiro[2.0.2.