Search Results

You are looking at 41 - 50 of 355 items for :

  • "insertion" x
  • All content x
Clear All
Acta Alimentaria
Authors: M. Mitterer-Daltoé, J. Latorres, R. Treptow, L. Pastous-Madureira, and M. Queiroz

The objective of this study was to evaluate the acceptance of breaded fish (Engraulis anchoita) by public school students aged 5–18 (n=830) from two cities in the state of Rio Grande do Sul, Brazil. First, by using multivariate analyses, the authors sought to assess the effect of the variables sex, city, and age on the acceptance of breaded fish. The second objective was to develop a predictive model that was applicable to different levels of acceptance. The results showed that the significant variable for the acceptance of breaded fish was age. According to the linear model and the descriptive statistics, an inverse relationship exists between the acceptance of breaded fish in school meals and the age of the children, possibly a consequence of the children being more critical in their food preference with the rising age, making the insertion of a new food that is not part of their eating behaviour more difficult.

Restricted access

Absztrakt

Bevezetés: A hazai mellkassebészetek jó részében érvényben lévő aranyszabály szerint napi rutinmellkasröntgen- (RTG-) vizsgálat elvégzése javasolt tüdőlobectomia után mindaddig, amíg a betegeknek mellkasi csövük van. Más itthoni centrumokban viszont nem ragaszkodnak ehhez a gyakorlathoz. A szerzők e két szemlélet eredményeit hasonlítják össze osztályuk anyagában. Anyag és módszer: 148 olyan beteget értékeltek, akiknél problémamentes lobectomia és egy mellkasi cső behelyezése történt. A rutinmellkas-RTG-csoportba (R-RTG) 50 beteg tartozik, akiknél közvetlenül a műtét után, valamint a szívás idején naponta rutinszerűen és a cső eltávolítását követő napon szintén mellkas-RTG-felvétel készült. 98 betegnél csak tünetek és/vagy panasz esetén (láz, hypoxia, subcutan emphysema, tartós levegőkilépés) és/vagy a mellkasi drain eltávolítását követő napon készült RTG (T-RTG). A következő műtét utáni adatokat értékelték: láz, kóros RTG kép/lelet (pneumothorax [PTX], folyadék, atelectasia, subcutan emphysema, haematoma), RTG-felvételek száma, drainage-tartam és esetleges új cső behelyezése. Eredmények: Az átlagos drainage-idő 3,7 és 3,8 nap volt az R-RTG- és a T-RTG-csoportokban. A mellkasi cső eltávolítását követően kóros RTG-leletet az R-RTG-csoport betegeinek 50%-ában (25/50) és a T-RTG-csoport 46,9%-ában (46/98) (p = 0,724) kaptak, de új cső behelyezésére az R-RTG-csoportban csak 12%-ban (3/25), illetve a T-RTG-csoportban csak 15,2%-ban (7/46) volt szükség. Az elkészített RTG-felvételek száma az R-RTG-csoportban 5,0, míg a T-RTG-csoportban 2,3 volt (p = 0,0001). Következtetés: Nem volt több műtét utáni szövődmény és csőeltávolítás utáni kóros RTG-lelet, ha az RTG-felvétel csak a betegek tünetei/panaszai alapján készült a rutinszerű napi RTG-vizsgálatok helyett. A kóros RTG-leleteken jelzett szövődményeknek csak 12–15%-a igényelt új csőbehelyezést. A tünetek alapján kért RTG-felvételek száma megközelítőleg 50%-kal csökkenthető.

Restricted access

Abstract  

The cleanup of high-level defense nuclear waste at the Hanford Site presents many challenges. These include removing and disposing of components from buried active waste tanks to allow new equipment insertion or hazards mitigation. This paper discusses a unique automated system that provides for retrieval, high-pressure washing, inventory measurement, and containment for disposal. Key to the inventory measurement is a three-detector high-purity germanium high-performance gamma-spectroscopy system capable of recovering data at up to 90-percent saturation (200,000 counts/s). Data recovery is based on a unique embedded electronic pulser and special software to report the inventory. Each detector has different shielding specified through simulation using the Monte Carlo computer code for N-particle transport modeling. This shielding provides performance over a dynamic range of eight orders of magnitude. This paper covers system description, calibration issues, and operation.

Restricted access

Abstract

It is well established that gallium insertion into the hydroxiapatite matrix as practiced in orthopedics protects bone from resorbtion and improves the biomechanical properties of the skeletal system. The research presented in this article is an investigation into the thermal decomposition of gallium nitrate, which is part of a complex process leading to the preparation of a hybrid matrix. It was demonstrated that after melting of the hexahydrate in its own water there occurs a simultaneous condensation of 4 mol of initial monomer Ga(NO3)3·6H2O into a tetramer Ga4O4(NO3)4. The resulting inorganic cycle gradually loses N2O5 and, through the formation of unstable oxynitrates, is transformed into gallium oxide. The use of molecular mechanics for comparing the potential energies of consecutive products of thermal decomposition permitted an evaluation of their stability and an appropriate interpretation of the experimental data.

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: W. Zielenkiewicz, I. Terekhova, A. Marcinowicz, M. Koźbial, and J. Poznanski

Abstract  

Interactions of native and modified α- and β-cyclodextrins with nicotinic acid, pyridoxine and pyridoxal were studied by isothermal titration calorimetry, solution calorimetry, and 1H NMR spectroscopy at 298.15 K and pH 6.8. Weak 1:1 complex formation was found only between α-cyclodextrin and nicotinic acid. The stability constant and corresponding thermodynamic parameters of complex formation (Δc G, Δc H and Δc S) were calculated using the calorimetric data. The 1H NMR data indicate the shallow insertion of the carboxylic group of the nicotinic acid molecule into α-CD cavity. For all other compounds the weak interactions, not accompanied by complex formation, were characterized by the enthalpic virial coefficients calculated on the basis of McMillan-Mayer approach. The obtained thermodynamic parameters were analyzed in the terms of influence of the solutes’ structure on the selectivity of intermolecular host-guest interactions.

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: M. Arnal, V. Balsamo, G. Ronca, A. Sánchez, A. Müller, E. Cañizales, and C. Urbina de Navarro

Abstract  

A new technique to thermally fractionate polymers using DSC has been recently developed in our laboratory. The applications of the novel successive self-nucleation and annealing (SSA) technique to characterize polyolefins with very dissimilar molecular structures are presented as well as the optimum conditions to thermally fractionate any suitable polymer sample with SSA. For ethylene/-olefin copolymers, the SSA technique can give information on the distribution of short chain branching and lamellar thickness. In the case of functionalized polyolefins, detailed examinations of SSA results can help to establish possible insertion sites of grafted molecules. The application of the technique to characterize crosslinked polyethylene and crystallizable blocks within ABC triblock copolymers is also presented.

Restricted access

Abstract  

In his interpretation of the Comedy, the author wants to demonstrate that Dante, besides the four senses of meaning, applied an other hermeneutic method, typology, as well. The poet describes every important historical, natural or human event as a result of God/man/nature relationship, i.e. the periodic intervention of God in human history, renewed with salvation. In the inherent terminology, referring to the period before Christ, figure, prefiguration and fulfilment are the operative concepts and words, while in the Christian period these are repetition, exemplarity and renovation. Concerning the language, the different poetical constructions (letters, word forms, stress, hendecasyllabus, rhymes), the insertions in Latin, have an independent significance. These consequently recurring elements and citations from the other works of the poet reinforce Dante's consciousness in this aspect of medieval hermeneutics.

Restricted access

Abstract  

Several mononuclear Co(II), Ni(II), Cu(II), and Fe(II) complexes of tetradentate salpren-type diimine, obtained from 3,5-di-tert-butyl-2-hydroxybenzaldehyde and 1,3-diaminopropane have been prepared and characterized by analytical, spectroscopic (FT-IR, UV–VIS) techniques, magnetic susceptibility measurements and thermogravimetric analyses (TG). The thermodynamic and thermal properties of complexes have been investigated. For further characterization Direct Insertion Probe-Mass Spectrometry (DIP-MS) was used and the fragmentation pattern and also stability of the ions were evaluated. The characterization of the end products of the decomposition was achieved by X-ray diffraction. The thermal stabilities of metal complexes of N,N′-bis(3,5-di-t-butylsalicylidene)-1,3-propanediamine ligand (L) were found as Ni(II) > Cu(II) > Co(II) > Fe(II).

Restricted access

Abstract

An 82-year-old gentleman with situs inversus and dextrocardia was admitted to our unit following thrombolysis for inferior ST-elevation myocardial infarction (STEMI). Due to ongoing ischemic symptoms, he underwent emergency transradial coronary angiography. His culprit right coronary artery (RCA) was heavily calcified with severe stenosis in the mid and distal segments. Therefore, rotational atherectomy was performed for debulking, and four drug eluting stents were deployed in the RCA. To the best of our knowledge, this is the first reported case of successful transradial rotablation percutaneous coronary intervention in acute STEMI in a patient with dextrocardia. We also did not use temporary pacemaker wire insertion (TPW) because of the risk of right ventricular perforation (RV) in inferior STEMI with RV involvement.

Restricted access

Abstract  

Instruments that measurein situ radiation from natural or radiochemically-contaminated earth formations must be calibrated in appropriate facilities to provide quantitative assessments of concentrations of radionuclides. For instruments that are inserted into boreholes, these calibration facilities are typically special models having holes for probe insertion and having sufficient size to appear radiometrically infinite in extent. The U.S. Department of Energy (DOE) has such models at Hanford, Washington, and Grand Junction, Colorado. They are concrete cylinders having a central borehole and containing known, enhanced amounts of K, U, and Th for spectral gamma-ray measurements. Additional models contain U for calibrating neutron probes for fissile materials and total-count gamma-ray probes. Models for calibrating neutron probes for moisture measurements in unsaturated formations exist for steel-cased boreholes at Hanford and for uncased boreholes at the DOE's Nevada Test Site. Large surface pads are available at Grand Junction for portable, vehicle-mounted, or airplane-mounted spectral gamma-ray detectors.

Restricted access