129 research outputs found
Thermal computational model to predict thermal necrosis in bone sarcomas
Sarcomas are heterogeneous tumors that form frombonetissue, connective tissue, cartilaginous tissue,muscle tissue, adipose tissue, peripheral nerves, and blood vessels,usually atits extremities. These tumors occur at any age and in any region of the patient's body.info:eu-repo/semantics/publishedVersio
18-month hydration of a low-pH cement for geological disposal of radioactive waste: The Cebama reference cement
Low-pH cements are candidate materials for use in the construction of geological disposal facilities for the long-term management of nuclear waste. Since these facilities will operate over long time scales, the changes in mineralogy and microstructure require evaluation as a function of time. As a first step towards this understanding, the hydration of a standardised low-pH cement paste, known as the Cebama reference cement, was investigated over an 18-month period. Characterisation was performed at 28 days of curing, at 20 °C and 40 °C, and novel synchrotron radiation X-ray diffraction experiments were performed, in-situ, from 90 min to 18 months of curing. Concurrent solid state 29Si and 27Al MAS NMR data were acquired for parallel samples to quantify the extent of cement hydration and the composition and mean chain length of the predominant calcium aluminosilicate hydrate (C-(A)-S-H) reaction product. After 18 months, cement clinker phases were still present, highlighting the slow hydration kinetics of this low-pH cement. The data presented provide a benchmark for ongoing and future studies of low-pH cements in geological disposal environments, over extended time scales
Estudo térmico numérico em sarcomas ósseos
Os sarcomas são tumores heterogéneos que se formam no tecido ósseo, tecido conjuntivo, tecido cartilageneo,
tecido muscular, tecido adiposo, nervos periféricos e vasos sanguíneos, geralmente nas extremidades. A cimentação é uma técnica utilizada por exemplo, em procedimentos percutâneos como vertebroplastia, cifoplastia, osteoplastia e sacroplastia. Os cimentos ósseos são biomateriais sintéticos compostos por um
polímero (pó) e um componente líquido (monómero). A introdução de cimento ósseo no tecido tem como objetivo tratar ou prevenir fraturas patológicas vertebrais e extraespinhais, aliviar a dor em doentes com
osteoporose e metástases, por exemplo.info:eu-repo/semantics/publishedVersio
A Predictive Model of Postnatal Surgical Intervention in Children With Prenatally Detected Congenital Anomalies of the Kidney and Urinary Tract
The aim of this study was to identify predictive factors and develop a model to
assess individualized risk of postnatal surgical intervention in patients with antenatal
hydronephrosis. This is a retrospective cohort study of 694 infants with prenatally
detected congenital anomalies of kidney and urinary tract with a median follow-up time
of 37 months. The main event of interest was postnatal surgical intervention. A predictive
model was developed using Cox model with internal validation by bootstrap technique.
Of 694 patients, 164 (24%) infants underwent surgical intervention in a median age of
7.8 months. Predictors of the surgical intervention in the model were: baseline glomerular
filtration rate, associated hydronephrosis, presence of renal damage and the severity
of renal pelvic dilatation. The optimism corrected c statistic for the model was 0.84
(95%CI, 0.82–0.87). The predictive model may contribute to identify infants at high risk
for surgical intervention. Further studies are necessary to validate the model in patients
from other settings
Tamanho de coleção original, métodos de agrupamento e amostragem para obtenção de coleção nuclear de germoplasma
Morphological abnormalities and apoptosis in lamellar tissue of equines after intestinal obstruction and treatment with hydrocortisone
Inseminação artificial em tempo fixo e diagnóstico precoce de gestação em vacas leiteiras mestiças
Efeito de anti-inflamatórios não esteroidais na apoptose de células epidermais lamelares de equinos com laminite
A European Multi Lake Survey dataset of environmental variables, phytoplankton pigments and cyanotoxins
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