Search results for "EHL"
showing 10 items of 39 documents
Periodontal disease associated to systemic genetic disorders
2007
A number of systemic disorders increase patient susceptibility to periodontal disease, which moreover evolves more rapidly and more aggressively. The underlying factors are mainly related to alterations in immune, endocrine and connective tissue status. These alterations are associated with different pathologies and syndromes that generate periodontal disease either as a primary manifestation or by aggravating a pre-existing condition attributable to local factors. This is where the role of bacterial plaque is subject to debate. In the presence of qualitative or quantitative cellular immune alterations, periodontal disease may manifest early on a severe localized or generalized basis - in s…
Clinical use of the ocular point spread function for retinal image quality assessment
2008
The purpose of this study is to demonstrate the clinical use of the point spread function (PSF) as metric for the assessment of retinal image quality in eyes with different ocular conditions. The PSF was computed from the wavefront aberrations obtained in seven eyes with different ocular conditions: emmetropia, myopia, hyperopia, post-myopic laser in situ keratomileusis (LASIK), post-hyperopic LASIK, keratoconus, Intacs ® in keratoconus, radial keratotomy (RK), LASIK after RK, cataract, phacoemulsification after cataract surgery, and LASIK after astigmatic keratotomy. The Strehl intensity ratio was calculated for all the PSFs computed. The PSF was correlated with the change in the optical e…
Gāzu hromatogrāfijas-augstas izšķirtspējas masspektrometrijas metodes izstrāde dehlorānu grupas savienojumu noteikšanai pārtikas produktos
2017
Gāzu hromatogrāfijas-augstas izšķirtspējas masspektrometrijas metodes izstrāde dehlorānu grupas savienojumu noteikšanai pārtikas produktos. Brizga A., zinātniskais vadītājs prof. Vīksna A. un zinātniskā konsultante Mg. chem., doktorante Rjabova J. Maģistra darbs, 47 lappuses, 16 attēli, 14 tabulas, 32 literatūras avots, 1 pielikums latviešu valodā. Darba literatūras apskatā aplūkota un analizēta informācija par dehlorānu grupas savienojumu īpašībām, izplatību apkārtējā vidē un cilvēku organismā, kā arī par noteikšanas metodēm. Izvērtēti piemērotākie paraugu sagatavošanas un instrumentālās analīzes parametri. Darbā izstrādāta dehlorānu grupas savienojumu noteikšanas metode, izmantojot gāzu h…
Optical and Visual Quality of the Visian Implantable Collamer Lens Using an Adaptive-Optics Visual Simulator
2013
To evaluate visual and optical quality of the implantable collamer lens for different powers and sizes of incision surgery.Prospective study in humans.An adaptive optics visual simulator was used to measure 3 powers of implantable collamer lenses and simulate the implantable collamer lens wavefront aberration's pattern for small- and large-incision surgery. Visual acuity (VA) and contrast sensitivity were measured in 11 observers for 3- and 5-mm pupils. Modulation transfer function, point spread function, and Strehl ratio were calculated.At 3 mm pupil, no statistically significant differences were found between both incision sizes for any implantable collamer lens power, except for -15 diop…
Physical Activity Among Children With Congenital Heart Defects in Germany: A Nationwide Survey
2020
Objective: In children with congenital heart defects (CHD), a sedentary lifestyle should be avoided and usually WHO recommendations on physical activity (PA) are supposed to be followed. In order to obtain representative data of the actual amount of PA (and potential influencing factors) in children with CHD we performed a nationwide online survey.Methods: All patients aged 6–17 years registered in the German National Register for CHD were contacted by email and asked to participate in the survey using the comprehensive questionnaire of the “Motorik-Modul” from the German Health Interview and Examination Survey for Children and Adolescents (KiGGS), thus allowing the comparison with a repres…
Early intestinal perforation secondary to congenital mesenteric defects
2016
Abstract Gastrointestinal perforation (GIP) in preterm neonates may be idiopathic, due to necrotizing enterocolitis (NEC), or mechanical obstruction. The predominant cause of GIP in the neonatal period is NEC. Differential diagnosis with congenital malformations, including mesenteric defects leading to internal hernias, is mandatory if the onset is early. We describe two newborns with trans-mesenteric herniation resulting in GIP, and we discuss the presence of possible additional risk factors such as prematurity and predisposing vascular disruption in connective tissue disorders (Ehlers-Danlos syndrome), twinning, and use of assisted reproductive technologies. These cases prompted us to rev…
Imaging Quality of Bifocal Piggyback Intraocular Lens versus ReSTOR and TECNIS Multifocal Lenses
2009
Purpose The imaging quality provided by a piggyback integrated by a monofocal intraocular lens (IOL) + a bifocal IOL of zero power and +3.75 diopters of addition is compared with the optics quality of a simple multifocal IOL of the same power and addition. Methods The imaging quality was evaluated by determining the modulation transfer function (MTF), using an artificial eye simulating in vivo conditions of the anterior chamber, including an artificial cornea and a wet cell containing physiologic solution where the IOL was positioned. The MTFs of the bifocal piggyback for near and distance vision were measured, with pupil diameters of 3 and 5 mm, and compared with the MTFs of an equivalent …
La discussione ortografica tedesca a metà del Novecento: le Stuttgarter e Wiesbadener Empfehlungen.
2008
The twentieth century has been for the German orthography a period of several studies and discussions which gave scientific foundation to the 1996 spelling reform. There were plenty of public and private initiatives which, by involving an constantly increasing number of writers into the debates, tried to simplify the spelling to a more rational regulation. This essay focuses on the discussion in the late Fifties and especially on two reform projects: the Stuttgarter (1954) and the Wiesbadener Empfehlungen (1958). Despite their deeply different historical background from that of the recent successful reform, these projects are of fundamental interest for contemporary studies, since they give…
The Water to Water Cycles in Microalgae.
2016
In oxygenic photosynthesis, light produces ATP plus NADPH via linear electron transfer, i.e. the in-series activity of the two photosystems: PSI and PSII. This process, however, is thought not to be sufficient to provide enough ATP per NADPH for carbon assimilation in the Calvin-Benson-Bassham cycle. Thus, it is assumed that additional ATP can be generated by alternative electron pathways. These circuits produce an electrochemical proton gradient without NADPH synthesis, and, although they often represent a small proportion of the linear electron flow, they could have a huge importance in optimizing CO2 assimilation. In Viridiplantae, there is a consensus that alternative electron flow comp…
Notas para una crítica de la antropología filosófica de G. Sartori
2003
Lectura crítica de la obra de G. Sartori Homo videns, subtitulada aquí como La sociedad teledirigida, en la que se cuestionan su restrictiva definición antropológica del homo sapiens, su tergiversada utilización de la antropología de E. Cassirer, su interpretación de la antropología de A. Gehlen, su uso acrítico del concepto de cultura, y una filosofía de la historia muy discutible, con pobres referencias a Vico y a Nietzsche.