Search results for "Critical"
showing 10 items of 3024 documents
Geometric Morphometric Studies in the Human Spine
2019
This chapter overviews the theoretical basics of geometric morphometrics (GM) and reviews its potential for the study of hominin vertebrae and vertebral columns. We show that challenges are related to seriality and the metameric nature of the spine. Measuring a series of vertebrae is a time-consuming process because the necessary sample sizes need to be multiplied by the number of vertebrae composing the spine or its anatomical parts. This is particularly true when measuring 3D semilandmarks of curves and surfaces in virtual anthropology. The lack of independence among vertebral series of a skeleton and the complex conceptual relation between the shape of vertebrae (parts) and the effect of…
A Locked Intraosseous Nail for Transverse Patellar Fractures: A Biomechanical Comparison with Tension Band Wiring Through Cannulated Screws.
2018
Background Displaced transverse patellar fractures require open reduction and internal fixation. State-of-the-art stabilization techniques are tension band wiring (TBW) using Kirschner wires or cannulated screws. These techniques are associated with high rates of secondary fracture displacement, implant migration, implant prominence, wound-healing disturbances, and the need for implant removal. Recently, a locked intraosseous patellar nail prototype was developed. The aim of the present study was to investigate the biomechanical performance of this nail compared with TBW using cannulated screws. Methods Seven paired fresh-frozen human cadaveric knees were stripped of all soft tissues except…
Spinal anaesthesia in a patient with post-spine surgery dural ectasia.
2013
Dural sac ectasia is a very infrequent anatomical abnormality, usually caused by connective tissue diseases, as Marfan syndrome. Very few cases have been described being a consequence of a previous spine surgical procedure. We describe the case of an elderly patient who should be operated on twice due to sub-occlusive colon disease. Surgery was performed under spinal anaesthesia. A dural sac ectasia was suspected after the first procedure and the abdominal X-ray was reviewed. The characteristics of the anatomical alteration and the course of both anaesthetic procedures were described. X-ray and CT images were provided.
Influence of sutures configuration on the strength of tendon-patch joints for rotator cuff tears treatment
2019
Abstract Purpose Massive rotator cuff tears are common in the aging population. The incidence of failed rotator cuff repairs is still quite high, especially in the treatment of full-thickness tears or revision repairs. In this context, natural and synthetic meshes can be used as augmentation scaffolds or as devices to close the gap between a retracted tendon and the bone. The purpose of this work is to evaluate the ultimate tensile strength of different tendon-patch joints in order to consider their use in the treatment of massive cuff tears. Materials and methods Porcine tendons and a synthetic low-density polypropylene mesh have been used. A preliminary study on the tensile strength of te…
Multiplex Ligation-dependent Probe Amplification (MLPA)
2011
The Multiplex Ligation-dependent Probe Amplification (MLPA) is a PCR-based method. The procedure relies on sequence-specific probe hybridization of genomic DNA, followed by multiplex-PCR amplification of the hybridized probe and a semiquantitative analysis of the resulting PCR products. MLPA allows the analysis of around 40 loci in the same reaction, and is a sensitive and relatively fast technique. Only a small amount of DNA is required and results are available within 2 days.The critical factors when performing MLPA analyses from formalin-fixed paraffin-embedded (FFPE) tissues are DNA integrity and purity; for this reason, a suitable DNA extraction method must be chosen.The MLPA protocol …
Gender, identity and representation in video games : an elective discourse-oriented course for Finnish EFL upper secondary school students
2015
Suomen koulujen opetussuunnitelmat pyrkivät toteuttamaan ja edistämään tasa-arvoa, mutta tasa-arvon toteutuminen koulujen arjessa vaatii vielä työtä. Samaan aikaan videopeleistä on tullut suosittu harrastus nuorten ja aikuisten keskuudessa, mutta sekä pelit että peleihin liittyvä keskustelu ovat tasa-arvon suhteen jälkijunassa. Pelaaminen ei ole enää yksinomaan nuorten poikien harrastus. Monet oppijat sukupuoleen katsomatta pelaavat erilaisia pelejä ja osallistuvat pelejä koskevaan keskusteluun. Tämän pro gradu -tutkielman tavoitteena on tuottaa lukio-opetukseen tarkoitettu kurssimateriaalipaketti, jonka avulla kuka tahansa opettaja pystyy lähestymään naisten representaatiota videopeleissä …
"Janie do Cię wracamy w czarnoleskie lipy". Polskie tradycje źródłowe w odmianach literacko-kulturowej współczesności (wybory - powtórzenia - różnice)
2018
The subject of the article - developed through the literary and cultural contexts of contemporary literature - concentrates mainly on different forms of the presence of tradition (targeting the Romantic one as key and the Old Polish as the subsequent one). A look at the styles and tones of the literature-"thriving" languages of these traditions allows us to see these traditions in a different critical light (national symbols/Polish signs/patters/transformations).
Blends of Semiflexible Polymers: Interplay of Nematic Order and Phase Separation
2021
Mixtures of semiflexible polymers with a mismatch in either their persistence lengths or their contour lengths are studied by Density Functional Theory and Molecular Dynamics simulation. Considering lyotropic solutions under good solvent conditions, the mole fraction and pressure is systematically varied for several cases of bending stiffness κ (the normalized persistence length) and chain length N. For binary mixtures with different chain length (i.e., NA=16, NB=32 or 64) but the same stiffness, isotropic-nematic phase coexistence is studied. For mixtures with the same chain length (N=32) and large stiffness disparity (κB/κA=4.9 to 8), both isotropic-nematic and nematic-nematic unmixing oc…
Sensitivity analysis in investment project of biogas plant
2017
The article shows the practical value of biogas as the second generation biofuel. All the projects dealing with biogas are subjected to external risks, such as the change of market condition, customer needs, governmental regulation, etc. In conditions of uncertainty it is necessary for administration to concentrate on decisionmaking. Fluctuations of sales volume, energy resources and raw material prices, etc. should be taken into account. Sensitivity analysis can predict the result of negative external pheno mena. We developed the economic-mathematical model for the analysis of biogas complexes sensitivity. The profitability index as a criterion for the effectiveness of investment projects …
Effect of combination therapy with hypothermia, magnesium and tirilazad in an experimental model of diffuse cerebral ischemia
2007
Objetivo. Valorar el grado de neuroprotección combinando hipotermia con magnesio y tirilazad en la isquemia cerebral global. La isquemia cerebral es uno de los problemas de mayor interés en la actualidad con unas medidas terapéuticas limitadas. La utilización de la hipotermia, una de las más eficaces, junto con los fármacos neuroprotectores puede ser una alternativa válida. Diseño. Estudio experimental con grupo control y dos niveles de aplicación de medidas terapéuticas. Ámbito. Laboratorio experimental de la Facultad de Medicina. Participantes y método. Veintiocho ratas Wistar sufrieron isquemia cerebral global de 10 minutos de duración mediante la combinación del clampaje carotídeo bilat…