Search

The application of liquid pig slurry (LPS) to pastures offers potential as a fertilizer but could have a direct influence on soil CO2 emissions. This study evaluated soil carbon dioxide emissions after successive LPS applications to soils under pasture cultivation. The experiment was carried out on 'Tifton-85' bermudagrass pasture cultivated in a red-yellow oxisol soil in the municipality of Lucas do Rio Verde-MT, Brazil. Two treatments were evaluated: the control and an application of 20 m3 ha-1 of LPS after each cut of the pasture. The CO2 emissions from the soil were determined using a high-precision infrared gas analyzer. Soil temperature and soil moisture were determined as were micrometeorological variables. The application of LPS had a significant effect on soil C-CO2 flow. The average flow of C-CO2 from the soil for the control treatment and with the application of LPS was 0.236 g C-CO2 m-2 h-1 and 0.291 g C-CO2 m-2 h-1, respectively. The application of LPS increased the accumulated CO2 emissions from the soil by 23.2%. Soil temperature and moisture are the main factors regulating the process of soil CO2 emission. These factors therefore need to be considered when evaluating the impact of LPS application on greenhouse gas emissions. Made available in DSpace on 2021-08-25T19:00:41Z (GMT). No. of bitstreams: 1 Soil-CO2-emission-in-Tifton-85-bermudagrass-pasture-2021.pdf: 750578 bytes, checksum: 07acb35a8905f5b8b3f3a2d6036a6d6a (MD5) Previous issue date: 2021

This article focuses on how older persons perceive their friends' role in their daily experience of chronic pain. It reports part of the results of a study in which we interviewed 49 participants, aged 75 and older, about the way they communicate about chronic pain within their social network. Using discourse and content analysis, we first examine older persons' definition of friendship, and then identify the various dimensions of friendship that are engaged in the communication about chronic pain. Participants define close friends as people with whom they share intimacy and social proximity (same gender, age and experience of pain). These dimensions allow older persons to talk freely about their pain without the fear of being judged or rejected, particularly when it is related to a dynamic of reciprocity. This article shows that the contribution of friends to the everyday life of older persons with chronic pain is mainly that of providing emotional support.

Lead halide perovskites are causing a change of paradigm in photovoltaics. Among other peculiarities, these perovskites exhibit an atypical temperature dependence of the fundamental optical gap: It decreases in energy with decreasing temperature. So far reports ascribe such a behavior to a particularly strong electron-phonon renormalization of the band gap, neglecting completely contributions from thermal expansion effects. However, high pressure experiments performed, for instance, on the archetypal perovskite MAPbI$_3$, where MA stands for methylammonium, yield a negative pressure coefficient for the gap of the tetragonal room-temperature phase, which speaks against the assumption of a negligible gap shift due to thermal expansion. On the basis of the high pressure results, we show here that for MAPbI$_3$ the temperature-induced gap renormalization due to electron-phonon interaction can only account for about 40\% of the total energy shift, thus implying thermal expansion to be the dominant term. Furthermore, this result possesses general validity, holding also for the tetragonal or cubic phase, stable at ambient conditions, of other halide perovskite counterparts., 24 pages (manuscript 17 pages + supplementary information 7 pages), 5 figures (manuscript 4 figures + supplementary information 1 figure), submitted to J. Phys. Chem. Lett

Made available in DSpace on 2019-12-11T00:42:22Z (GMT). No. of bitstreams: 1 ART19038.pdf: 467942 bytes, checksum: 8ebeae6d6b20075b0bb6cca8ff27b47f (MD5) Previous issue date: 2019

Made available in DSpace on 2018-01-16T23:26:57Z (GMT). No. of bitstreams: 1 ART17084.pdf: 389793 bytes, checksum: 253548ece00ce108f5f4a9dc43f526d0 (MD5) Previous issue date: 2018-01-16

Made available in DSpace on 2017-11-20T23:22:02Z (GMT). No. of bitstreams: 1 ART17044.pdf: 149518 bytes, checksum: 6bc2c0903530cad8ee178911a742a637 (MD5) Previous issue date: 2017-11-09

Background: With regard to acute stroke, patients with unknown time from stroke onset are not eligible for thrombolysis. Quantitative diffusion weighted imaging (DWI) and fluid attenuated inversion recovery (FLAIR) MRI relative signal intensity (rSI) biomarkers have been introduced to predict eligibility for thrombolysis, but have shown heterogeneous results in the past. In the present work, we investigated whether the inclusion of easily obtainable clinical-radiological parameters would improve the prediction of the thrombolysis time window by rSIs and compared their performance to the visual DWI-FLAIR mismatch. Methods: In a retrospective study, patients from 2 centers with proven stroke with onset

The risk of cut-out of a pedicle screw is high in the presence of osteoporotic bone. In cadaver studies it was found that cement augmentation of pedicle screws markedly increases pullout forces. However, the use of conventional low viscosity vertebroplasty or kyphoplasty cement is associated with the risk of cement extravasation. The risk might be reduced by using high viscosity, radiofrequency-activated bone cement. After performing DEXA scans, six fresh-frozen vertebral bodies of different bone densities were obtained from cadavers. Two pedicle screws (WSI Expertise-Inject, Peter Brehm, Germany) were placed in the pedicles. About 3 ml of radiofrequency-activated, ultra-high viscosity cement (ER2 Bone Cement, DFine Europe GmbH, Germany) was injected through the right pedicle. The left pedicle screw was left uncemented and served as control. Axial pullout tests were performed using a material testing device (Zwick/Roell Zmartpro, Ulm, Germany). The tests revealed that cementaugmented pedicle screws were able to withstand markedly higher pullout forces. Extravasation of cement did not occur. The value of the study is limited by the fact that only six samples were investigated. Further cadaver studies and clinical evaluation will be needed in the future. However, this pilot study showed that combining cannulated pedicle screws with ultra-high viscosity bone cement is a successful approach. Revision due to cut-out and complications secondary to cement extravasation can be reduced by this method.

Background and Purpose: In acute stroke, the DWI-FLAIR mismatch allows for the allocation of patients to the thrombolysis window (,4.5 hours). FLAIR-lesions, however, may be challenging to assess. In comparison, DWI may be a useful bio-marker owing to high lesion contrast. We investigated the performance of a relative DWI signal intensity (rSI) threshold to predict the presence of FLAIR-lesions in acute stroke and analyzed its association with time-from-stroke-onset. Methods: In a retrospective, dual-center MR-imaging study we included patients with acute stroke and time-from-strokeonset 12 hours (group A: n = 49, 1.5T; group B: n = 48, 3T). DW- and FLAIR-images were coregistered. The largest lesion extent in DWI defined the slice for further analysis. FLAIR-lesions were identified by 3 raters, delineated as regions-of-interest (ROIs) and copied on the DW-images. Circular ROIs were placed within the DWI-lesion and labeled according to the FLAIRpattern (FLAIR+ or FLAIR-). ROI-values were normalized to the unaffected hemisphere. Adjusted and nonadjusted receiver-operating- characteristics (ROC) curve analysis on patient level was performed to analyze the ability of a DWI- and ADC-rSI threshold to predict the presence of FLAIR-lesions. Spearman correlation and adjusted linear regression analysis was performed to assess the relationship between DWI-intensity and time-from-stroke-onset. Results: DWI-rSI performed well in predicting lesions in FLAIR-imaging (mean area under the curve (AUC): group A: 0.84; group B: 0.85). An optimal mean DWI-rSI threshold was identified (A: 162%; B: 161%). ADC-maps performed worse (mean AUC: A: 0.58; B: 0.77). Adjusted regression models confirmed the superior performance of DWI-rSI. Correlation coefficents and linear regression showed a good association with time-from-stroke-onset for DWI-rSI, but not for ADC-rSI. Conclusion: An easily assessable DWI-rSI threshold identifies the presence of lesions in FLAIR-imaging with good accuracy and is associated with time-from-stroke-onset in acute stroke. This finding underlines the potential of a DWI-rSI threshold as a marker of lesion age.

Bei Osteoporose ist die Gefahr des Cut-out einer Pedikelschraube erhöht. Die Zementaugmentation von Pedikelschrauben erhöht die Ausrisskraft im Kadaverversuch deutlich. Aufgrund der Verwendung von herkömmlichen, dünnflüssigen Vertebro- oder Kyphoplastiezementen besteht allerdings die Gefahr der Zementextravasation. Dieses Risiko könnte durch die Verwendung eines zähflüssigen, Radiofrequenz- aktivierten Knochenzements deutlich vermindert werden. Nach einem Dexa-Scan wurden 6 fresh-frozen Kadaverwirbelkörper verschiedener Knochendichte ausgewählt. Nach Instrumentation der Pedikel mit einer WSI Expertise-Injekt-Schraube (Peter Brehm, Weisendorf, Deutschland) wurde über einen Zementierungsadapter ca. 3 ml ultrahochvisköser, mit Radiofrequenz aktivierter Zement (ER2 Bone Zement, DFine Europe GmbH, Deutschland) über die rechte Pedikelschraube injiziert. Die linke Pedikelschraube verblieb unzementiert im Sinne einer Kontrolle. Die Testung der Ausrisskraft erfolgte durch axialen Ausriss (Zwick/Roell Zmartpro, Ulm, Deutschland). Im Ausrissversuch konnte durch die Zementaugmentation die Ausrisskraft der Pedikelschrauben massiv gesteigert werden, Zementextravasation wurde nicht festgestellt. Die Aussagekraft der Studie ist bei einer Probenzahl von 6 begrenzt. Weitere Kadaverversuche und die klinische Evaluation sind in Zukunft notwendig. Diese Pilotstudie zeigt, dass die Kombination einer kanülierten Pedikelschraube mit maschineller Applikation von Radiofrequenzaktiviertem Zement einen Mehrwert ergibt. Die Revisionsrate aufgrund eines Cut-out der Pedikelschrauben sowie die Komplikationen durch Zementaustritt sinkt hierdurch.

Session 6: Semiconductors on Insulators; International audience

Fragestellung: Bei kleinen und mittleren Defekten des distalen Unterschenkels, der Knöchel- und der Fußregion gehört der distal gestielte Suralislappen zum Standardverfahren der rekonstruktiven Unfallchirurgie. Zunehmend wird dieser auch für sehr große, der freien Lappenplastik[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2012)

Fragestellung: Die Versorgung der distalen intraartikulären Humerusfraktur des älteren Menschen wird kontrovers diskutiert. Mittlerweile ist, insbesondere bei mehrfragmentären und sehr distal gelegenen Frakturen die primäre Versorgung mit einer Ellenbogen Totalendoprothese etabli[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 75. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 97. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 52. Tagung des Berufsverbandes der Fachärzte für Orthopädie

We present the application of the smoothed particle hydrodynamics (SPH) discretization scheme to Phillips' model for shear-induced particle migration in concentrated suspensions. This model provides an evolution equation for the scalar mean volume fraction of idealized spherical solid particles of equal diameter which is discretized by the SPH formalism. In order to obtain a discrete evolution equation with exact conservation properties we treat in fact the occupied volume of the solid particles as the degree of freedom for the fluid particles. We present simulation results in two-and three-dimensional channel flow. The two-dimensional results serve as a verification by a comparison to analytic solutions. The three-dimensional results are used for a comparison with experimental measurements obtained from computer tomography of injection moulded ceramic microparts. We observe the best agreement of measurements with snapshots of the transient simulation for a ratio D-c/D-eta = 0.1 of the two model parameters.

Fragestellung: Die Verwendung einer zementaugmentierten Pedikelschraube ist bisher nur bei vorbestehender Osteoporose oder Revionsoperation empfohlen. Häufig bleibt es aber dem intraoperativen Gespür bzw. der Erfahrung des Operateurs überlassen, eine Pedikelschraube zu augmentieren. [for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 74. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 96. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 51. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Pseudo tumours are amongst the rare yet pathognomonic complications of haemophilia. They are old, encapsulated haematomas which due to their sometimes enormous size can cause massive complaints. These haematomas are surrounded by a thick fibrous capsule. They are attributed to persistent bleedings. The pathophysiology of pseudo tumors is not conclusively established yet. Some believe that they originate from bone material or the periosteum, while others suggest their development from soft tissue. They spread aggressively, displace the surrounding tissue, and cause secondary periosteal erosion of the bone. This results in bone resorption and destruction of surrounding muscular and soft tissue. Pseudo tumours develop slowly over many years. They occur primarily in adults and are largely unresponsive to conservative treatment.A 48-year-old man with moderate hemophiliaA (FVIII:C 2%) and no FVIII inhibitor. Due to recurrent bleeding into the muscle of the right thigh diagnosis of two pseudo tumours (psoas, adductor magnus). In 2004 tumour extirpation with subsequent relapse; because of high local bleeding tendency (despite permanent prophylaxis with FVIII concentrate and adjusted lifestyle) surgical revision in 02/2008. Postoperatively, no recurrent bleeding; the patient is fully fit for work three months later.In order to reduce the complication rate when a pseudo tumor is suspected, patients should be treated in a specially equipped interdisciplinary center with adequately trained and experienced surgeons and haemostaseologists.

Magnetization transfer imaging (MTI) by means of MRI exploits the mobility of water molecules in tissue and offers an alternative contrast mechanism beyond the more commonly used mechanisms based on relaxation times. A cardiac MTI method was implemented on a commercially available 1.5 T MR imager. It is based on the acquisition of two sets of cardiac-triggered cine balanced steady-state free precession (bSSFP) images with different levels of RF power deposition. Reduction of RF power was achieved by lengthening the RF excitation pulses of a cine bSSFP sequence from 0.24 ms to 1.7 ms, while keeping the flip angle constant. Normal volunteers and patients with acute myocardial infarcts were imaged in short and long axis views. Normal myocardium showed an MT ratio (MTR) of 33.0 ± 3.3. In acute myocardial infarct, MTR was reduced to 24.5 ± 9.2 (P < 0.04), most likely caused by an increase in water content due to edema. The method thus allows detection of acute myocardial infarct without the administration of contrast agents.

Fragestellung: Welche Versorgung für die Tibikopffraktur beim älteren Patienten als die adäquate und richtige Therapie zu empfehlen sei, wird in der Literatur sehr kontrovers diskutiert. Das Ziel der folgenden Studie war das funktionelle Langzeitergebnis und die Lebensqualität nach[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 73. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 95. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 50. Tagung des Berufsverbandes der Fachärzte für Orthopädie

The environmental behaviour of metolachlor and diuron was studied in the Central-western region of Brazil, by means of a field study where six experimental plots were installed. The soil was classified as a Latosol, and the soil horizons were characterized. Sorption of metolachlor and diuron was evaluated in laboratory batch experiments. Metolachlor and diuron were applied to the experimental plots on uncultivated soil in October 2003. From this date to March 2004, the following processes were studied: leaching, runoff and dissipation in top soil. Koc of metolachlor varied from 179 to 264 mL g?1 in the soil horizons. Koc of diuron in the Ap horizon was 917 mL g?1, decreasing significantly in the deeper horizons. Field dissipation half-lives of metolachlor and diuron were 18 and 15 days, respectively. In percolated water, metolachlor was detected in concentrations ranging from 0.02 to 2.84 ?g L?1. In runoff water and sediment, metolachlor was detected in decreasing concentrations throughout the period of study. Losses of 0.02% and 0.54% of the applied amount by leaching and runoff, respectively, were observed confirming the high mobility of this herbicide in the environment. In percolated water, diuron was detected with low frequency but in relatively high concentrations (up to 6.29 ?g L?1). In runoff water and soil, diuron was detected in decreasing concentrations until 70 days after application, totalizing 13.9% during the whole sampling period. These results show the importance of practices to reduce runoff avoiding surface water contamination by these pesticides, particularly diuron.

O objetivo deste estudo foi verificar o potencial do índice LIX na previsão da lixiviação dos agrotóxicos metolacloro, endossulfam, clorpirifós, carbendazim e diurom. Para tanto, coletaram-se amostras de solo, deformada e indeformada, de LATOSSOLO AMARELO distrófico típico, cultivado com algodão do município de Primavera do Leste (MT), nos horizontes Ap (0-20 cm), A/B (20-40 cm) e Bw1 40- 92 cm). Efetuou-se a simulação da lixiviação em laboratório, sendo determinados o coeficiente de sorção e os atributos físico-químicos do solo diretamente relacionados à lixiviação de pesticidas. Para a previsão do potencial de lixiviação, utilizouse o índice LIX. Os resultados experimentais em condições de laboratório, de forma geral, foram concordantes com os do índice LIX, sendo que os agrotóxicos diurom e metolacloro que apresentaram maior mobilidade nas colunas de solo, também apresentaram maiores valores desse índice. Entretanto, a faixa de classificação do LIX proposta para agrotóxicos lixiviáveis, pelos seus autores, não explicou a alta mobilidade encontrada para o metolacloro.

Fragestellung: Die adäquate Verankerung einer Pedikelschraube im osteoporotischen Knochen ist eine Herausforderung. Das Knochen-Implantatinterface wird durch die chirurgische Technik, Implantatdesign, Zementaugmentation und die Knochendichte wesentlich beeinflusst. Das Ziel dieser Studie war es,[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 73. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 95. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 50. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Fragestellung: Distale intraartikuläre Humerusfrakturen des älteren Menschen wurden bislang im deutschsprachigen Raum vorwiegend osteosynthetisch versorgt. Allerdings kann die Frakturmorphologie in Kombination mit Osteoporose eine suffiziente Reposition, Retention und frühe postoperative[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 73. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 95. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 50. Tagung des Berufsverbandes der Fachärzte für Orthopädie

A procedure is developed for assessing the epitaxy of La2-xZr2+xO7 (LZO) layers on NiW RABITS. Comparing XRD patterns (theta-2 theta scans and 2D rocking curves) of LZO films of known thickness (ellipsometry or reflectometry measurements) with those of standard samples (100% epitaxial LZO film and an isotropic LZO pellet of known density), we estimate the epitaxial (EF), and polycrystalline (PF) fractions of LZO within the layer. The procedure was tested using MOD-LZO (100 nm)/NiW tape samples with varied from 3 to 90% (reproducibly prepared by varying the humidity of Ar - 5%H-2 gas during heat treatment). A qualitative agreement with RHEED and quantitative (within +/- 10%) agreement with the EBSD results was shown. Correlation between EF and J(c) in 600 nm thick YBCO layer deposited on MOD-LZO/NiW using thermal coevaporation enables us to impose the EF = 80% margin on the quality of LZO layer for the particular conductor architecture.

International audience

article; International audience

International audience

National audience

International audience

Este trabalho objetivou avaliar o efeito de uma bactéria diazotrófica isolada de abacaxizeiro (Ananas comosus) sobre o crescimento e o acúmulo de nutrientes de mudas micropropagadas da cultivar Cayenne Champac, crescidas em tubetes com diferentes substratos. Os substratos foram: casca de arroz carbonizada, bagana de carnaúba e vermicomposto; casca de arroz carbonizada, pó de coco e vermicomposto; casca de arroz carbonizada, vermiculita e vermicomposto; casca de arroz carbonizada, bagana de carnaúba e vermiculita; casca de arroz carbonizada e pó de coco; e casca de arroz carbonizada e vermiculita. O isolado de bactéria foi identificado pela similaridade (97% a 98%) de seqüências de DNAr 16S com a espécie Asaia bogorensis. Após a inoculação do isolado bacteriano nas mudas micropropagadas, estas foram transferidas para os substratos dos tubetes. Aos quatro meses de aclimatação, por ocasião de colheita, as mudas estavam aptas para o plantio no campo. A ocorrência de bactéria diazotrófica relacionada a A. bogorensis em abacaxizeiros está sendo apresentada pela primeira vez. O isolado de bactéria diazotrófica AB219 propiciou maior taxa de sobrevivência e, no substrato com casca de arroz carbonizada, vermiculita e vermicomposto, maior acúmulo de massa seca de raízes das plantas. O conteúdo de sódio nas mudas Made available in DSpace on 2017-09-19T00:12:07Z (GMT). No. of bitstreams: 1 Weber.pdf: 561909 bytes, checksum: 9529f500a2346cb64ceb0128dc818574 (MD5) Previous issue date: 2006-10-02