Transportverhalten von Plutonium und Americium in niedrig angereicherten beschichteten Brennstoffteilchen bei hohenBestrahlungstemperaturen

Low enriched coated fuel particles with different kernel composition (oxide, carbide, oxicarbide) were irradiated at high temperatures in the range of 1100-1600°C reaching burnup values of 11-12 % FIMA. By mechanical separation of kernel and coating of single irradiated particles followed by chemical separation and alphaspectrometric determination of plutonium and americium, the internal release of both transuranium elements was measured. In coated particles with U0$_{2}$ kernels the amount of Pu and Am in the coating was the saure as the amount of uranium before irradiation : any internal release of Pu and Am from UO$_{2}$ kernels could not be observed. From UC$_{2}$ and UCO kernels both transuranium elements were released, the fractional release of americium was always higher than that of plutonium. Effective diffusion coefficients of the transuranium elements describing their release behaviour from UC$_{2}$ kernels were found to be in the range of (2,0$\pm$0,8)-10$^{-14}$ cm$^{2}$s$^{-1}$ (plutonium) and (2,4$\pm$0,8)-10$^{-13}$ cm$^{2}$ (americium) at an average irradiation temperature of about 1350°C. Using UO$_{2}$ kernels these coefficients are surely below 2,5 $\cdot$ 10$^{-18}$ cm$^{2}$s$^{-1}$. Plutonium and americium diffused through pyrocarbon coatings nearly equally with average diffusion coefficients of 1,6$\cdot$10$^{-11}$ cm$^{2}$s$^{-1}$ (plutonium) and 2,3$\cdot$10$^{-11}$ cm$^{2}$s$^{-1}$ (americium). These data agree within their standard deviation with earlier published diffusion coefficients of plutonium in pyrocarbon coatings

Joint ultrasonography in 250 horses with hindlimb lameness

C

Accessory carpal bone fracture repair by means of computer‐assisted orthopaedic surgery in a Warmblood stallion

A 10-year-old, 595 kg Irish Warmblood stallion used for showjumping was presented with a marked right forelimb lameness at walk. The horse sustained a dorsal plane fracture of the accessory carpal bone (ACB) when falling with both carpi in flexion. The fracture was repaired by means of computer-assisted orthopaedic surgery (CAOS) using two cortex screws placed in lag fashion. In a second CAOS procedure, a dorsoproximal fragment of the ACB was removed after further proximal displacement had become apparent. Both surgical procedures were facilitated by the application of a fibreglass cast to immobilise the carpus in extension and to allow for the placement of the patient tracker distant from the surgical site. One year after surgery, the horse had returned to full athletic activity. Neither the antebrachiocarpal joint nor the carpal sheath were distended. Control radiographs and standing cone beam computed tomography showed complete osseous union of the fracture and osteophyte formation on the caudal aspect of the radius and the proximal border of the ACB

Feasibility, indications, and radiographically confirmed diagnoses of standing extremity cone beam computed tomography in the horse.

OBJECTIVE To report on the feasibility, indications, and diagnostic yield of cone beam computed tomography (CBCT) of horses' extremities performed under standing sedation. STUDY DESIGN Retrospective clinical case series. SAMPLE POPULATION Fifty-nine CBCT examinations in 58 horses. METHODS Examinations were categorized for indications for CBCT dependent on a suspicion, presence, or absence of a diagnosis prior to CBCT. The number of acquisitions per examination, total time for the examination, diagnostic score of each acquisition (diagnostic, diagnostic-compromised, nondiagnostic), and additional diagnostic information regarding preexisting diagnostic information were recorded. RESULTS Three (median) acquisitions were performed per examination in a median study time of 14 minutes. In 24 of 33 cases with a suspected diagnosis, this diagnosis was confirmed or definitively refuted; in seven of 33 cases, the suspected diagnosis was refuted without a new diagnosis; and, in two of 33 cases, the suspected diagnosis could not be confirmed nor could a new diagnosis be made. In five of nine cases without a preexisting diagnosis, a diagnosis was established. In 16 cases with a diagnosis prior to CBCT, additional information was recorded, or a surgical plan was prepared. In 14 of 18 cases in which additional contrast techniques were used, additional information was gained. CONCLUSION Standing CBCT of the horses' extremities is feasible and can produce diagnostic information in a timely fashion. CLINICAL SIGNIFICANCE The results provide evidence of the practicality and diagnostic potential of standing CBCT of horses' extremities

Transportverhalten von Plutonium und Americium in niedrig angereicherten beschichteten Brennstoffteilchen bei hohen Bestrahlungstemperaturen

SIGLEDEGerman

Assessment of specific muscle tension in dogs through functional electrical stimulation of the gastrocnemius muscle

status: publishe

Sequence-based typing of Legionella pneumophila serogroup 1 clinical isolates from Belgium between 2000 and 2010.

Sequence-based typing (SBT) is a discriminatory method widely used to genotype Legionella pneumophila strains. A total of 86 clinical L. pneumophila serogroup 1 (sg1) isolates, collected between January 2000 and December 2010 in the two Belgian National Reference Centres for Legionella pneumophila, were genotyped using the internationally standardised SBT protocol of the European Working Group for Legionella Infections (EWGLI). The isolates could be classified into 31 different sequence types (ST, index of diversity: 0.879). The obtained STs were submitted to the EWGLI SBT-database for L. pneumophila. In our study, ST47 (27.9%) and ST1 (19.8%) were the most frequently detected STs. The detected profiles were a combination of both frequently isolated and unique STs, and of both worldwide distributed and more local strains. Two STs, ST880 and ST881, were new to the EWGLI database. In conclusion, we characterised L. pneumophila sg1 isolates with the SBT method, and created a Belgian profile database that will be useful for future epidemiological studies.Journal Articleinfo:eu-repo/semantics/publishe