Search results for "opacity"

Belief reports and pragmatic intrusion: the case of null appositives. Journal of Pragmatics 40 (2008), 1019-1040.

2008

Was heißt wie? Ansatz und Glossar zu Befundung und Verständnis in der HRCT der Lunge

1996

In HRCT reports multiple different, often synonymous, German and English terms are used. The variety of terms impede understanding and acceptance of HRCT. Purpose of this paper is to present a scheme, which is based on the anatomic landmarks (secondary lobule), and the density of pathologic changes, as well as a glossary from the German HRCT-literature, including suitable terms, definitions, synonyms and English terms. Low attenuation changes include emphysemas, air-filled cavities (bullae, cysts, cavitations, honeycombing) and bronchial dilatation, changes with increased density consist of diffuse (ground glass opacity, consolidation) and focal processes (reticular and nodular densities). …

Nitrogen-Doped Carbon Nanodots-Ionogels: Preparation, Characterization, and Radical Scavenging Activity

2018

Hybrid diimidazolium-based ionogels were obtained by dispersing nitrogen-doped carbon nanodots (NCNDs) in ionic liquid (IL) solutions and by using dicationic organic salts as gelators. The properties of the NCND-ionogels were studied in terms of thermal stability, mechanical strength, morphology, rheological, and microscopic analyses. Insights into the formation of the hybrid soft material were attained from kinetics of sol-gel phase transition and from estimating the size of the aggregates, obtained from opacity and resonance light-scattering measurements. We demonstrate that, on one hand, NCNDs were able to favor the gel formation both in the presence of gelating and nongelating ILs. On t…

Artifacts in Light Scattering Experiments Using Opaque Scattering Screens on the Example of Spinodal Decomposition

1996

Sensitivity of jet quenching to enhancement of the medium opacity near TC

2014

[Introduction] One of the main goals of the study of high transverse momentum ( P T ) observables in the context of ultrarelativistic heavy-ion collisions is the determination of properties of QCD matter. In particular, the transport coefficients ˆ q and ˆ e characterizing the interaction of the medium with a high p T parton are accessible via hard probes. However, a precision extraction of their temperature dependence from current data faces the problem that neither the space-time geometry of the evolving matter nor the link between thermodynamics and transport coefficients is unambiguously known. Thus, various conjectured scenarios exist for how thermodynamics and transport coefficients b…

ANALYSIS OF THE RADIO-OPACITY OF A SELF-ETCH ADHESIVE

2012

Introduction. At present, self-etch adhesive systems are employed on large scale in the offices of dental medicine due to their simple application technique. Their radioopacity is important for the identification of this material in paraclinical examinations. Scope. The study describes a technique of radioopacity analysis on a self-etching type adhesive material. Materials and method. Class V cavities have been made on the teeth extracted from orthodontic causes. The dental adhesive was applied on the surface of the cavities, followed by their obturation with a composite material. The teeth were sliced, radiographed, the resulting digital images being analyzed with a specialized software. R…

Objective assessment of cataract: Comparison between the Lens Opacities Classification System III and a Scheimpflug camera

2015

Purpose Develop an automatic system for cataract classification using the Sirius Scheimpflug for both nuclear and cortical cataract. Methods Scheimpflug images were taken using the Sirius system in 50 patients with nuclear and/or cortical cataract (mean age 69 ± 9.2 years). The nuclear opacity (NO) and cortical opacity was graded by an ophthalmologist according to the Lens Opacities Classification System (LOCSIII) by comparing the slit-lamp image with the LOCS's standard nuclear images. A custom-made MATLAB program was used to calculate the pixel intensity value within a region of interest (ROI) of the nucleus and to calculate the percentage of opaque pixels in the cortex. Results Eighty-ni…

Preliminary study on the existence of ocular injuries after bullfighting or fire bull

2019

The vision of the bull is the cornerstone of the celebration in which it is the protagonist, both when it is fought and when it is “embolado” in popular festivities. An alteration of the vision could suppose an excessive danger for the animal and for the one that faces him. The bullfight and the “toro embolado” are traditions that present controversy between certain groups of people, for that reason, the present study aims to determine if there are ocular injuries in the bulls after both activities. For this work we use a total of 50 eyes, 40 from 20 fighting bull and 10 from 5 “toros embolados”. After the macroscopic and microscopic study carried out with fluorescein tests, ultrasounds, di…

Mitomycin C bei oberflächlichen Hornhautablationen mit dem Excimer-Laser: Eigene Erfahrungen und Literaturübersicht

2005

Haze formation with loss of corneal transparency and surface irregularities and myopic regression are the major complications after corneal refractive surface surgery. The use of mitomycin C (MMC) with its antibiotic and antineoplastic properties is intended to inhibit wound healing mechanisms leading to subepithelial fibrosis. We report the use of MMC to achieve visual rehabilitation in the re-treatment of 3 eyes of 2 patients following refractive corneal surgery. According to the literature, the local use of MMC 0.02 % for 2 minutes is safe and enables one to treat and prevent stromal haze and myopic regression and allows a reduction of the postoperative topical pharmacotherapy. Results a…

Corneal opacity and copper levels of the Lewis syndrome after systemic chemotherapy

2020

Abstract Purpose To report a female patient of biclonal Lewis syndrome which consists of a trias: biclonal gammopathy of undetermined significance, paraproteinemic keratopathy in form of a brownish discoid opacification at the level of Descemet's membrane and hypercupremia. After several years there was a conversion to multiple myeloma. Systemic chemotherapy led to a complete remission of multiple myeloma and to a normalization of the copper level in the blood that lasted five years. The corneal opacification remained unchanged. Observations A currently 66-year-old woman suffered from biclonal Lewis syndrome. On both eyes there is a central discoid yellow-brownish discoloration in the Pre-D…