Search

Your search keyword '"Bartczak, P."' showing total 510 results
Start Over Author "Bartczak, P."
510 results on '"Bartczak, P."'

302. NEW CRYSTALLINE POLYMORPHIC FORM OF GLYPHOSATE: SYNTHESIS, CRYSTAL AND MOLECULAR STRUCTURES OF N-(PHOSPHONOMETHYL)GLYCINE

Author

Krawczyk, Henryk and Bartczak, Tadeusz

Abstract

Synthesis of the herbicide glyphosate, N-(phosphonomethyl)glycine has been modified by using MnO2 in the presence of H2SO4 for the oxidation of substrate, i.e., N-(phosphonomethyl)iminodiacetic acid. The obtained solid appeared to be a new, crystalline polymorphic form of glyphosate. The x-ray structure of the compound has shown that the crystals are monoclinic with P2, space group, a = 7.1190(5), b = 5.428(1), c = 9.1225(5) Å β = 105.043(6)°, V = 340.41(7) Å3, Z = 2. The solution by direct methods and refinement gave final residuals of R = 0.0318, wR = 0.0395 and s = 0.78. The crystal structure of commercial glyphosate which was solved previously by three independent groups, was solved again for comparison. This determination is the most accurate so far. The bond lengths and angles are practically identical in both crystalline forms of glyphosate. The conformation of the molecule's backbone is however different as the torsion angles in Table IV show.

Published
1993
Full Text
View/download PDF

303. EVALUATION OF EQUATIONS APPROXIMATING THERMODYNAMIC AND TRANSPORT PROPERTIES OF WATER, STEAM ANDAIR FOR USE IN CAD OF DRYING PROCESSES

Author

Pakowski, Z., Bartczak, Z., Strumio, C., and Stenström, S.

Abstract

Over 70 equations approximating thermodynamic and transport of water and steam at pressure 1 bar and saturated pressure as well as air at pressure 1 bar were tested against reference data. Their accuracy and relative computing time were reported.

Published
1991
Full Text
View/download PDF

305. Tri-(nitrato)-bis-(hexamethylenetetramine)-nona-(aquo) neodymium (III): Synthesis, crystal structure, IR and Raman spectroscopy

Author

Zalewicz, M. and Bartczak, T. J.

Abstract

This paper reports the structural and spectroscopic properties of tri-(nitrato)-bis-(hexamethylene-tetramine)-nona-(aquo)neodymium (III). The crystals are monoclinic, space groupP21/n,Z=4, witha=17.902(4),b=9.335(2),c=18.489(4)Å, B=112.07(2)°. The crystal structure consists of one [Nd(NO3)2(H2O)6]+ cation, two NO3- anions coordinated to the neodymium atom, two hexamethylene tetramine molecules, third free NO3- anion and three water molecules. The structure was refined to a finalR index 0.039 and weightedRw 0.039 for 6221 observed reflections. The IR and Raman spectra are fully consistent with the crystallographic results.

Published
1993
Full Text
View/download PDF

306. SYNTHESIS, CHARACTERIZATION AND CRYSTAL STRUCTURE OF DIAQUADI(ACETATO-O)-BIS(2,4'-BIPYRIDYL) MANGANESE(II)

Author

Bartczak, Tadeusz, Czakis-sulikowska, Danuta, and Kałuzna, Joanna

Abstract

The title complex [Mn(H2O)2(ac-O)2(2,4'-bipy)2] (1) (ac = CH3COO-, 2,4'-bipy = 2,4'-bipyridyl) has been synthesized and characterized by elemental and thermal analysis, IR, magnetic and conductivity studies. The structure of [Mn(H2O)2(ac-O)2(2,4'-bipy)2] has been determined by single crystal X-ray methods; the complex crystallizes in the monoclinic system, space group P21/c with Z = 2, a = 8.035(1), b = 5.660(1), c = 26.130(5) Å, β = 97.05(1)°, V = 1179.36 Å3. The structure was solved by the Patterson method and refined by full-matrix least-squares techniques using F2 values to conventional R = 0.050 for 2322 independent reflections with F0 > 4s`(F0). The central Mn atom lies on a centre of symmetry and is six-coordinated to two CH3COO- groups, two water molecules and two bipyridyl groups.

Published
1998
Full Text
View/download PDF

310. Computer simulation studies of recombination of ions in multi-ion-pair ensembles

Author

Bartczak, W. and Hummel, A.

Abstract

Abstract: The problem of the diffusion-controlled recombination of ions for the case where initially two or more nonseparable pairs of oppositely charged ions are present in the system is treated by means of computer simulation. In the first stage, the calculations for the media with the short mean free paths of the free movement of ions between scattering events were performed (diffusion model). The results were compared with the results of the calculations of the electron-cation recombination in the systems characterized by long mean free path of electron between the scattering events. The scale of the deviations of the kinetics of the recombination process in the multi-pair clusters from the kinetics for the isolated pairs was estimated for both the diffusion case and the long mean free path case. The deviations of the multi-pair kinetics and escape probability from the corresponding single-pair results are significant.

Published
1998
Full Text
View/download PDF

313. Experimental and Clinical Applications of Fibrin Glue

Author

Saltz, Renato, Sierra, David, Feldman, Dale, Saltz, Marcia Bartczak, Dimick, Alan, and Vasconez, Luis O.

Abstract

A 2year experience with laboratory and clinical applications of fibrin glue is presented. An autologous technique, which eliminates the danger of multidonor preparations, has been developed in our blood bank. While one can obtain different fibrinogen concentrations from the same amount of a patient's blood, in vitro mechanical testing demonstrated that at higher fibrinogen concentrations there is an increase in shear adhesive strength. Evaluation of skingraft take in 16 SpragueDawley rats did not demonstrate significant differences in healing when adhesive use was compared with suture technique. In a clinical study, four different groups of patients facial burns, hand burns, difficult graft sites, and miscellaneous surgical applications benefited from autologous or singledonor fibrin glue for a total of 82 cases. There are several distinct advantages to the use of fibrin adhesive The autologous technique eliminates the risk of transmissible viral diseases AIDS, hepatitis it can be used as a sealant in the treatment of seromas, dural leaks, and lymphoceles and it improves hemostasis and early graft adherence. Face and hands are resurfaced with sheet grafts in a single procedure, obtaining a better aesthetic result with complete graft take and immediate start of physical therapy. Neither sutures nor pressure dressings are required. The minimal postoperative care associated with early return to normal activities seems to increase the satisfaction of patients and nurse personnel.

Published
1991

315. A model for prestabilized electron relaxation

Author

Bartczak, W.M. and Kroh, J.

Abstract

A model for electron trap relaxation in glassy polar matrices is proposed. The relaxation process is considered as a result of two simultaneously occurring processes: molecular rotation under the influence of the field of the electron, and electron tunnelling from an occupied shallow unrelaxed trap to a slighly deeper pre-existing trap - this last process is followed by fast rotation of the trap constituting molecules on account of local “heating” of the matrix. This heating is the effect of the conversion of the electronic excess energy after transfer to the deeper trap into the local molecular motions of the trap neighbourhood. Numerical calculations are performed for ethanol and 1-propanol and the results obtained are in good accordance with experimental data. The ability of the model to describe the observed relaxation phenomena is discussed.

Published
1979
Full Text
View/download PDF

316. Modeling Of Multicomponent Drying Of A Shrinking Gel Cylinder Containing Dcca

Author

PAKOWSKI, Zdzislaw and BARTCZAK, Zdzislaw

Abstract

ABSTRACTInorganic chemical gels obtained by hydrolysis/condensation of organic precursors (alcoxides) contain alcohol and water mixture which fills pores of the gel. This mixture is either removed in supercritical conditions or by convective drying. During convective drying gels significantly shrink producing porous glass-like xerogels. Adding a third component called DCCA (Drying Control Chemical Additive) to sol crates a diffusional barrier which lowers the drying rate and also reduces cracking. This Paper presents formulation and solution of a rigorous model of multicomponent diffusion both in liquid and gas phase in the case of convective drying of a gel cylinder containing a ternary mixture of ethanol. water and formamide as DCCA. Details of the numerical technique and methods used for prediction of physico-chemical property data involved in the solution of the model are presented. A short discussion of the obtained results follow. The model can provide a basis for a more complex process description incorporating drying stresses and predicting conditions at which cracking occurs.

Published
1997
Full Text
View/download PDF

317. Drying of Silica Alcogels by Liquid and Supercritical C02

Author

Rogacki, G., Wawrzyniak, P., and Bartczak, Z.

Abstract

Gels dried in supercritical conditions give a new class of materials called aerogels. The process of silica aerogel production in which extraction with liquid (or supercritical) carbon dioxide is used, consists of four main stages: elution, diffusion, heating and evacuation.Aerogel production from silica gels prepared from tetraethoxysilane is described. The autoclave process which started with alcohol-liquid carbon dioxide exchange was followed by supercritical evacuation. Some important technical aspects of the process are considered. The effect of elution rate, temperature and duration of diffusion is investigated.

Published
1996
Full Text
View/download PDF

320. Recombination and Escape of Ions in High-Energy Charged Particle Tracks:  Computer Simulation Compared with the Analytical Model of Jaffé

Author

Bartczak, W. M., Siebbeles, L. D. A., and Hummel, A.

Abstract

Computer simulations have been carried out of the movement due to diffusion and drift in each other's field of ions in cylindrical tracks, representative for tracks of protons in the megaelectronvolt region in nonpolar molecular liquids. The recombination and the escape of the ions from the track, in the absence and presence of external electric fields, has been calculated. The decay in time of the number of ions due to recombination in the tracks is remarkably well described by the analytical treatment of Jaffé in 1913, when the Debye−Smoluchowski rate coefficient is used. It is concluded that the Debye−Smoluchowski expression, derived for dilute solutions (single pair interactions), is also valid for large concentrations. For low and moderate fields the ion escape yields as obtained by the Jaffé treatment are unsatisfactory. In this case the field effect is observed to resemble the behavior as given by the expression of Onsager for single pairs, in agreement with earlier theoretical predictions. For very large fields the ion escape yields obtained with the Jaffé treatment are in fair agreement with those of the simulations.

Published
1997

321. Computer Simulation of the Ion Escape from High-Energy Electron Tracks in Nonpolar Liquids

Author

Siebbeles, L. D. A., Bartczak, W. M., Terrissol, M., and Hummel, A.

Abstract

The number of ions escaping from recombination in high-energy electron tracks in saturated hydrocarbon liquids is calculated and compared with experimental results from the literature. The initial track structure is obtained by bringing the details of the electron scattering into account. The number of positive ions and electrons that escape from charge recombination is obtained from a computer simulation of the trajectories of the positive ions and the electrons. The probability that the charges escape from each other is seen to change appreciably with the energy of the primary high-energy electron. The thermalization distance distribution of the electrons in the track is obtained by comparing the calculated results with those from experiments. The influence of external electric fields on the escape of ions is considered.

Published
1997

322. Effect of endogenous heme generation on delta-aminolevulinic acid synthase activity in rat liver mitochondria.

Author

Wolfson, S J, Bartczak, A, and Bloomer, J R

Abstract

This study examined the possibility that generation of heme within mitochondria may provide a local concentration sufficient to inhibit the activity of delta-aminolevulinic acid (ALA) synthase, the enzyme that catalyzes the rate-limiting step in hepatic heme biosynthesis. This was accomplished by simultaneously running ALA synthase and heme synthase activities in intact mitochondria isolated from rat liver. Radiochemical assays were used to measure the enzyme activities. ALA synthase activity did not decrease as the rate of heme formation was increased by varying the concentration of substrates for heme synthase. Even at a rate of heme generation estimated to be at least 75 times the rate occuring in vivo, ALA synthase activity was unchanged. We conclude that end product inhibition of ALA synthase activity by heme is not an important physiological mechanism for regulation of hepatic heme biosynthesis.

Published
1979
Full Text
View/download PDF

324. Colour Centres near Ionic Crystal Surfaces I. The Surface VKCentres

Author

Bartczak, W. and Sugier, H.

Abstract

A simple theoretical model of the Vk‐centre situated on the (001) external surface of the f.c.c. alkali halide crystal has been derived. The energy of the VK‐centre calculated for the case of KCI using this model appeared to be about 0.49 eV less then that inside the crystal.

Published
1973
Full Text
View/download PDF

325. Conversion of 3-Arylphthalides into Anthrones with a Methylcarbonyl Substituent at the C-10 Position

Author

Bieniek, Adam, Bartczak, Monika M., and Epsztajn, Jan

Abstract

The ortho-lithiation of a benzoic acid anilide followed by condensation with an aryl aldehyde gave a 3-arylphthalide. Reductive alkylation with 1-methoxy-1-trimethylsilyloxyethene gave a substituted aromatic carboxylic acid which was cyclised to an anthrone bearing a methoxycarbonyl methylene unit at C-10.

Published
2009
Full Text
View/download PDF

326. New spectroscopy of multiple stars RR Lyncis and HT Virginis

Author

Bensch, K., Dimitrov, W., Zywucka, N., Fagas, M., Krzysztof Kamiński, Przybyszewska, A., Maliczak, M., Kurzawa, K., Kruszewski, A., Kowalczyk, T., Borczyk, W., Bakowska, K., Bartczak, P., Kwiatkowski, T., and Schwarzenberg-Czerny, A.

Subjects
Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics
Abstract

In this paper we present radial velocity measurements as a result of new spectroscopic observations of RR Lyncis and HT Virginis. Both systems are worth to be the objects of a long-term monitoring. The observations made during a long period of time reveal the apsidal motion and the movements around the center of mass of the systems. Long-term measurements enable us to measure the light-time effect in the eclipsing binaries as well. Data were collected using the Poznan Spectroscopic Telescope (PST1) at Borowiec station (Baranowski et al. 2009) covering a range of wavelength 4280-7500 Å. The telescope is equipped with an echelle spectrograph thermally stabilized to 0.1oC. The data were calibrated with ThAr (Thorium-Argon) lamp. Data reduction was performed with IRAF

328. M-type (22) Kalliope: A tiny Mercury

Author

Ferrais, M., Jorda, L., Vernazza, P., Carry, B., Brož, M., Rambaux, N., Hanuš, J., Dudziński, G., Bartczak, P., Vachier, F., Aristidi, E., Beck, P., Marchis, F., Marsset, M., Viikinkoski, M., Fetick, R., Drouard, A., Fusco, T., Birlan, M., Podlewska-Gaca, E., Burbine, T. H., Dyar, M. D., Bendjoya, P., Benkhaldoun, Z., Berthier, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Dumas, C., Ďurech, J., Fauvaud, S., Grice, J., Jehin, E., Kaasalainen, M., Kryszczynska, A., Lamy, P., Le Coroller, H., Marciniak, A., Michalowski, T., Michel, P., Prieur, J.-L., Reddy, V., Rivet, J.-P., Santana-Ros, T., Scardia, M., Tanga, P., Vigan, A., Witasse, O., Yang, B., Ferrais, M., Jorda, L., Vernazza, P., Carry, B., Brož, M., Rambaux, N., Hanuš, J., Dudziński, G., Bartczak, P., Vachier, F., Aristidi, E., Beck, P., Marchis, F., Marsset, M., Viikinkoski, M., Fetick, R., Drouard, A., Fusco, T., Birlan, M., Podlewska-Gaca, E., Burbine, T. H., Dyar, M. D., Bendjoya, P., Benkhaldoun, Z., Berthier, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Dumas, C., Ďurech, J., Fauvaud, S., Grice, J., Jehin, E., Kaasalainen, M., Kryszczynska, A., Lamy, P., Le Coroller, H., Marciniak, A., Michalowski, T., Michel, P., Prieur, J.-L., Reddy, V., Rivet, J.-P., Santana-Ros, T., Scardia, M., Tanga, P., Vigan, A., Witasse, O., and Yang, B.

329. (704) Interamnia: a transitional object between a dwarf planet and a typical irregular-shaped minor body

Author

Hanuš, J., Vernazza, P., Viikinkoski, M., Ferrais, M., Rambaux, N., Podlewska-Gaca, E., Drouard, A., Jorda, L., Jehin, E., Carry, B., Marsset, M., Marchis, F., Warner, B., Behrend, R., Asenjo, V., Berger, N., Bronikowska, M., Brothers, T., Charbonnel, S., Colazo, C., Coliac, J.-F., Duffard, R., Jones, A., Leroy, A., Marciniak, A., Melia, R., Molina, D., Nadolny, J., Person, M., Pejcha, O., Riemis, H., Shappee, B., Sobkowiak, K., Soldán, F., Suys, D., Szakats, R., Vantomme, J., Birlan, M., Berthier, J., Bartczak, P., Dumas, C., Dudziński, G., Ďurech, J., Castillo-Rogez, J., Cipriani, F., Fetick, R., Fusco, T., Grice, J., Kaasalainen, M., Kryszczynska, A., Lamy, P., Michalowski, T., Michel, P., Santana-Ros, T., Tanga, P., Vachier, F., Vigan, A., Witasse, O., Yang, B., Hanuš, J., Vernazza, P., Viikinkoski, M., Ferrais, M., Rambaux, N., Podlewska-Gaca, E., Drouard, A., Jorda, L., Jehin, E., Carry, B., Marsset, M., Marchis, F., Warner, B., Behrend, R., Asenjo, V., Berger, N., Bronikowska, M., Brothers, T., Charbonnel, S., Colazo, C., Coliac, J.-F., Duffard, R., Jones, A., Leroy, A., Marciniak, A., Melia, R., Molina, D., Nadolny, J., Person, M., Pejcha, O., Riemis, H., Shappee, B., Sobkowiak, K., Soldán, F., Suys, D., Szakats, R., Vantomme, J., Birlan, M., Berthier, J., Bartczak, P., Dumas, C., Dudziński, G., Ďurech, J., Castillo-Rogez, J., Cipriani, F., Fetick, R., Fusco, T., Grice, J., Kaasalainen, M., Kryszczynska, A., Lamy, P., Michalowski, T., Michel, P., Santana-Ros, T., Tanga, P., Vachier, F., Vigan, A., Witasse, O., and Yang, B.

330. VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis

Author

Vernazza, P., Ferrais, M., Jorda, L., Hanuš, J., Carry, B., Marsset, M., Brož, M., Fetick, R., Viikinkoski, M., Marchis, F., Vachier, F., Drouard, A., Fusco, T., Birlan, M., Podlewska-Gaca, E., Rambaux, N., Neveu, M., Bartczak, P., Dudziński, G., Jehin, E., Beck, P., Berthier, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Dumas, C., Ďurech, J., Grice, J., Kaasalainen, M., Kryszczynska, A., Lamy, P., Le Coroller, H., Marciniak, A., Michalowski, T., Michel, P., Santana-Ros, T., Tanga, P., Vigan, A., Witasse, O., Yang, B., Antonini, P., Audejean, M., Aurard, P., Behrend, R., Benkhaldoun, Z., Bosch, J. M., Chapman, A., Dalmon, L., Fauvaud, S., Hamanowa, Hiroko, Hamanowa, Hiromi, His, J., Jones, A., Kim, D.-H., Kim, M.-J., Krajewski, J., Labrevoir, O., Leroy, A., Livet, F., Molina, D., Montaigut, R., Oey, J., Payre, N., Reddy, V., Sabin, P., Sanchez, A. G., Socha, L., Vernazza, P., Ferrais, M., Jorda, L., Hanuš, J., Carry, B., Marsset, M., Brož, M., Fetick, R., Viikinkoski, M., Marchis, F., Vachier, F., Drouard, A., Fusco, T., Birlan, M., Podlewska-Gaca, E., Rambaux, N., Neveu, M., Bartczak, P., Dudziński, G., Jehin, E., Beck, P., Berthier, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Dumas, C., Ďurech, J., Grice, J., Kaasalainen, M., Kryszczynska, A., Lamy, P., Le Coroller, H., Marciniak, A., Michalowski, T., Michel, P., Santana-Ros, T., Tanga, P., Vigan, A., Witasse, O., Yang, B., Antonini, P., Audejean, M., Aurard, P., Behrend, R., Benkhaldoun, Z., Bosch, J. M., Chapman, A., Dalmon, L., Fauvaud, S., Hamanowa, Hiroko, Hamanowa, Hiromi, His, J., Jones, A., Kim, D.-H., Kim, M.-J., Krajewski, J., Labrevoir, O., Leroy, A., Livet, F., Molina, D., Montaigut, R., Oey, J., Payre, N., Reddy, V., Sabin, P., Sanchez, A. G., and Socha, L.

Abstract

Context. Until recently, the 3D shape, and therefore density (when combining the volume estimate with available mass estimates), and surface topography of the vast majority of the largest (D ≥ 100 km) main-belt asteroids have remained poorly constrained. The improved capabilities of the SPHERE/ZIMPOL instrument have opened new doors into ground-based asteroid exploration. Aims. To constrain the formation and evolution of a representative sample of large asteroids, we conducted a high-angular-resolution imaging survey of 42 large main-belt asteroids with VLT/SPHERE/ZIMPOL. Our asteroid sample comprises 39 bodies with D ≥ 100 km and in particular most D ≥ 200 km main-belt asteroids (20/23). Furthermore, it nicely reflects the compositional diversity present in the main belt as the sampled bodies belong to the following taxonomic classes: A, B, C, Ch/Cgh, E/M/X, K, P/T, S, and V. Methods. The SPHERE/ZIMPOL images were first used to reconstruct the 3D shape of all targets with both the ADAM and MPCD reconstruction methods. We subsequently performed a detailed shape analysis and constrained the density of each target using available mass estimates including our own mass estimates in the case of multiple systems. Results. The analysis of the reconstructed shapes allowed us to identify two families of objects as a function of their diameters, namely “spherical” and “elongated” bodies. A difference in rotation period appears to be the main origin of this bimodality. In addition, all but one object (216 Kleopatra) are located along the Maclaurin sequence with large volatile-rich bodies being the closest to the latter. Our results further reveal that the primaries of most multiple systems possess a rotation period of shorter than 6 h and an elongated shape (c/a ≤ 0.65). Densities in our sample range from ~1.3 g cm−3 (87 Sylvia) to ~4.3 g cm−3 (22 Kalliope). Furthermore, th

331. (216) Kleopatra, a low density critically rotating M-type asteroid

Author

Marchis, F., Jorda, L., Vernazza, P., Brož, M., Hanuš, J., Ferrais, M., Vachier, F., Rambaux, N., Marsset, M., Viikinkoski, M., Jehin, E., Benseguane, S., Podlewska-Gaca, E., Carry, B., Drouard, A., Fauvaud, S., Birlan, M., Berthier, J., Bartczak, P., Dumas, C., Dudziński, G., Ďurech, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Fetick, R., Fusco, T., Grice, J., Kryszczynska, A., Lamy, P., Marciniak, A., Michalowski, T., Michel, P., Pajuelo, M., Santana-Ros, T., Tanga, P., Vigan, A., Witasse, O., Yang, B., Marchis, F., Jorda, L., Vernazza, P., Brož, M., Hanuš, J., Ferrais, M., Vachier, F., Rambaux, N., Marsset, M., Viikinkoski, M., Jehin, E., Benseguane, S., Podlewska-Gaca, E., Carry, B., Drouard, A., Fauvaud, S., Birlan, M., Berthier, J., Bartczak, P., Dumas, C., Dudziński, G., Ďurech, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Fetick, R., Fusco, T., Grice, J., Kryszczynska, A., Lamy, P., Marciniak, A., Michalowski, T., Michel, P., Pajuelo, M., Santana-Ros, T., Tanga, P., Vigan, A., Witasse, O., and Yang, B.

Abstract

Context. The recent estimates of the 3D shape of the M/Xe-type triple asteroid system (216) Kleopatra indicated a density of ~5 g cm−3, which is by far the highest for a small Solar System body. Such a high density implies a high metal content as well as a low porosity which is not easy to reconcile with its peculiar “dumbbell” shape. Aims. Given the unprecedented angular resolution of the VLT/SPHERE/ZIMPOL camera, here, we aim to constrain the mass (via the characterization of the orbits of the moons) and the shape of (216) Kleopatra with high accuracy, hence its density. Methods. We combined our new VLT/SPHERE observations of (216) Kleopatra recorded during two apparitions in 2017 and 2018 with archival data from the W. M. Keck Observatory, as well as lightcurve, occultation, and delay-Doppler images, to derive a model of its 3D shape using two different algorithms (ADAM, MPCD). Furthermore, an N-body dynamical model allowed us to retrieve the orbital elements of the two moons as explained in the accompanying paper. Results. The shape of (216) Kleopatra is very close to an equilibrium dumbbell figure with two lobes and a thick neck. Its volume equivalent diameter (118.75 ± 1.40) km and mass (2.97 ± 0.32) × 1018 kg (i.e., 56% lower than previously reported) imply a bulk density of (3.38 ± 0.50) g cm−3. Such a low density for a supposedly metal-rich body indicates a substantial porosity within the primary. This porous structure along with its near equilibrium shape is compatible with a formation scenario including a giant impact followed by reaccumulation. (216) Kleopatra’s current rotation period and dumbbell shape imply that it is in a critically rotating state. The low effective gravity along the equator of the body, together with the equatorial orbits of the moons and possibly rubble-pile structure, opens the possibility that the moons formed via mass shedding.

332. Evidence for differentiation of the most primitive small bodies

Author

Carry, B., Vernazza, P., Vachier, F., Neveu, M., Berthier, J., Hanuš, J., Ferrais, M., Jorda, L., Marsset, M., Viikinkoski, M., Bartczak, P., Behrend, R., Benkhaldoun, Z., Birlan, M., Castillo-Rogez, J., Cipriani, F., Colas, F., Drouard, A., Dudziński, G. P., Desmars, J., Dumas, C., Ďurech, J., Fetick, R., Fusco, T., Grice, J., Jehin, E., Kaasalainen, M., Kryszczynska, A., Lamy, P., Marchis, F., Marciniak, A., Michalowski, T., Michel, P., Pajuelo, M., Podlewska-Gaca, E., Rambaux, N., Santana-Ros, T., Storrs, A., Tanga, P., Vigan, A., Warner, B., Wieczorek, M., Witasse, O., Yang, B., Carry, B., Vernazza, P., Vachier, F., Neveu, M., Berthier, J., Hanuš, J., Ferrais, M., Jorda, L., Marsset, M., Viikinkoski, M., Bartczak, P., Behrend, R., Benkhaldoun, Z., Birlan, M., Castillo-Rogez, J., Cipriani, F., Colas, F., Drouard, A., Dudziński, G. P., Desmars, J., Dumas, C., Ďurech, J., Fetick, R., Fusco, T., Grice, J., Jehin, E., Kaasalainen, M., Kryszczynska, A., Lamy, P., Marchis, F., Marciniak, A., Michalowski, T., Michel, P., Pajuelo, M., Podlewska-Gaca, E., Rambaux, N., Santana-Ros, T., Storrs, A., Tanga, P., Vigan, A., Warner, B., Wieczorek, M., Witasse, O., and Yang, B.

Abstract

Context. Dynamical models of Solar System evolution have suggested that the so-called P- and D-type volatile-rich asteroids formed in the outer Solar System beyond Neptune's orbit and may be genetically related to the Jupiter Trojans, comets, and small Kuiper belt objects (KBOs). Indeed, the spectral properties of P- and D-type asteroids resemble that of anhydrous cometary dust. Aims. We aim to gain insights into the above classes of bodies by characterizing the internal structure of a large P- and D-type asteroid. Methods. We report high-angular-resolution imaging observations of the P-type asteroid (87) Sylvia with the Very Large Telescope Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument. These images were used to reconstruct the 3D shape of Sylvia. Our images together with those obtained in the past with large ground-based telescopes were used to study the dynamics of its two satellites. We also modeled Sylvia's thermal evolution. Results. The shape of Sylvia appears flattened and elongated (a/b 1.45; a/c 1.84). We derive a volume-equivalent diameter of 271 ± 5 km and a low density of 1378 ± 45 kg m-3. The two satellites orbit Sylvia on circular, equatorial orbits. The oblateness of Sylvia should imply a detectable nodal precession which contrasts with the fully-Keplerian dynamics of its two satellites. This reveals an inhomogeneous internal structure, suggesting that Sylvia is differentiated. Conclusions. Sylvia's low density and differentiated interior can be explained by partial melting and mass redistribution through water percolation. The outer shell should be composed of material similar to interplanetary dust particles (IDPs) and the core should be similar to aqueously altered IDPs or carbonaceous chondrite meteorites such as the Tagish Lake meteorite. Numerical simulations of the thermal evolution of Sylvia show that for a body of such a size, partial melting was

333. Physical parameters of selected Gaia mass asteroids

Author

Podlewska-Gaca, E., Marciniak, A., Alí-Lagoa, V., Bartczak, P., Müller, T. G., Szakáts, R., Duffard, R., Molnár, L., Pál, A., Butkiewicz-Bąk, M., Dudziński, G., Dziadura, K., Antonini, P., Asenjo, V., Audejean, M., Benkhaldoun, Z., Behrend, R., Bernasconi, L., Bosch, J. M., Chapman, A., Dintinjana, B., Farkas, A., Ferrais, M., Geier, S., Grice, J., Hirsh, R., Jacquinot, H., Jehin, E., Jones, A., Molina, D., Morales, N., Parley, N., Poncy, R., Roy, R., Santana-Ros, T., Seli, B., Sobkowiak, K., Verebélyi, E., Żukowski, K., Podlewska-Gaca, E., Marciniak, A., Alí-Lagoa, V., Bartczak, P., Müller, T. G., Szakáts, R., Duffard, R., Molnár, L., Pál, A., Butkiewicz-Bąk, M., Dudziński, G., Dziadura, K., Antonini, P., Asenjo, V., Audejean, M., Benkhaldoun, Z., Behrend, R., Bernasconi, L., Bosch, J. M., Chapman, A., Dintinjana, B., Farkas, A., Ferrais, M., Geier, S., Grice, J., Hirsh, R., Jacquinot, H., Jehin, E., Jones, A., Molina, D., Morales, N., Parley, N., Poncy, R., Roy, R., Santana-Ros, T., Seli, B., Sobkowiak, K., Verebélyi, E., and Żukowski, K.

Abstract

Context. Thanks to the Gaia mission, it will be possible to determine the masses of approximately hundreds of large main belt asteroids with very good precision. We currently have diameter estimates for all of them that can be used to compute their volume and hence their density. However, some of those diameters are still based on simple thermal models, which can occasionally lead to volume uncertainties as high as 20–30%. Aims. The aim of this paper is to determine the 3D shape models and compute the volumes for 13 main belt asteroids that were selected from those targets for which Gaia will provide the mass with an accuracy of better than 10%. Methods. We used the genetic Shaping Asteroids with Genetic Evolution (SAGE) algorithm to fit disk-integrated, dense photometric lightcurves and obtain detailed asteroid shape models. These models were scaled by fitting them to available stellar occultation and/or thermal infrared observations. Results. We determine the spin and shape models for 13 main belt asteroids using the SAGE algorithm. Occultation fitting enables us to confirm main shape features and the spin state, while thermophysical modeling leads to more precise diameters as well as estimates of thermal inertia values. Conclusions. We calculated the volume of our sample of main-belt asteroids for which the Gaia satellite will provide precise mass determinations. From our volumes, it will then be possible to more accurately compute the bulk density, which is a fundamental physical property needed to understand the formation and evolution processes of small Solar System bodies.

334. VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis

Author

Vernazza, P., Ferrais, M., Jorda, L., Hanuš, J., Carry, B., Marsset, M., Brož, M., Fetick, R., Viikinkoski, M., Marchis, F., Vachier, F., Drouard, A., Fusco, T., Birlan, M., Podlewska-Gaca, E., Rambaux, N., Neveu, M., Bartczak, P., Dudziński, G., Jehin, E., Beck, P., Berthier, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Dumas, C., Ďurech, J., Grice, J., Kaasalainen, M., Kryszczynska, A., Lamy, P., Le Coroller, H., Marciniak, A., Michalowski, T., Michel, P., Santana-Ros, T., Tanga, P., Vigan, A., Witasse, O., Yang, B., Antonini, P., Audejean, M., Aurard, P., Behrend, R., Benkhaldoun, Z., Bosch, J. M., Chapman, A., Dalmon, L., Fauvaud, S., Hamanowa, Hiroko, Hamanowa, Hiromi, His, J., Jones, A., Kim, D.-H., Kim, M.-J., Krajewski, J., Labrevoir, O., Leroy, A., Livet, F., Molina, D., Montaigut, R., Oey, J., Payre, N., Reddy, V., Sabin, P., Sanchez, A. G., Socha, L., Vernazza, P., Ferrais, M., Jorda, L., Hanuš, J., Carry, B., Marsset, M., Brož, M., Fetick, R., Viikinkoski, M., Marchis, F., Vachier, F., Drouard, A., Fusco, T., Birlan, M., Podlewska-Gaca, E., Rambaux, N., Neveu, M., Bartczak, P., Dudziński, G., Jehin, E., Beck, P., Berthier, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Dumas, C., Ďurech, J., Grice, J., Kaasalainen, M., Kryszczynska, A., Lamy, P., Le Coroller, H., Marciniak, A., Michalowski, T., Michel, P., Santana-Ros, T., Tanga, P., Vigan, A., Witasse, O., Yang, B., Antonini, P., Audejean, M., Aurard, P., Behrend, R., Benkhaldoun, Z., Bosch, J. M., Chapman, A., Dalmon, L., Fauvaud, S., Hamanowa, Hiroko, Hamanowa, Hiromi, His, J., Jones, A., Kim, D.-H., Kim, M.-J., Krajewski, J., Labrevoir, O., Leroy, A., Livet, F., Molina, D., Montaigut, R., Oey, J., Payre, N., Reddy, V., Sabin, P., Sanchez, A. G., and Socha, L.

Abstract

Context. Until recently, the 3D shape, and therefore density (when combining the volume estimate with available mass estimates), and surface topography of the vast majority of the largest (D ≥ 100 km) main-belt asteroids have remained poorly constrained. The improved capabilities of the SPHERE/ZIMPOL instrument have opened new doors into ground-based asteroid exploration. Aims. To constrain the formation and evolution of a representative sample of large asteroids, we conducted a high-angular-resolution imaging survey of 42 large main-belt asteroids with VLT/SPHERE/ZIMPOL. Our asteroid sample comprises 39 bodies with D ≥ 100 km and in particular most D ≥ 200 km main-belt asteroids (20/23). Furthermore, it nicely reflects the compositional diversity present in the main belt as the sampled bodies belong to the following taxonomic classes: A, B, C, Ch/Cgh, E/M/X, K, P/T, S, and V. Methods. The SPHERE/ZIMPOL images were first used to reconstruct the 3D shape of all targets with both the ADAM and MPCD reconstruction methods. We subsequently performed a detailed shape analysis and constrained the density of each target using available mass estimates including our own mass estimates in the case of multiple systems. Results. The analysis of the reconstructed shapes allowed us to identify two families of objects as a function of their diameters, namely “spherical” and “elongated” bodies. A difference in rotation period appears to be the main origin of this bimodality. In addition, all but one object (216 Kleopatra) are located along the Maclaurin sequence with large volatile-rich bodies being the closest to the latter. Our results further reveal that the primaries of most multiple systems possess a rotation period of shorter than 6 h and an elongated shape (c/a ≤ 0.65). Densities in our sample range from ~1.3 g cm−3 (87 Sylvia) to ~4.3 g cm−3 (22 Kalliope). Furthermore, th

335. Physical parameters of selected Gaia mass asteroids

Author

Podlewska-Gaca, E., Marciniak, A., Alí-Lagoa, V., Bartczak, P., Müller, T. G., Szakáts, R., Duffard, R., Molnár, L., Pál, A., Butkiewicz-Bąk, M., Dudziński, G., Dziadura, K., Antonini, P., Asenjo, V., Audejean, M., Benkhaldoun, Z., Behrend, R., Bernasconi, L., Bosch, J. M., Chapman, A., Dintinjana, B., Farkas, A., Ferrais, M., Geier, S., Grice, J., Hirsh, R., Jacquinot, H., Jehin, E., Jones, A., Molina, D., Morales, N., Parley, N., Poncy, R., Roy, R., Santana-Ros, T., Seli, B., Sobkowiak, K., Verebélyi, E., Żukowski, K., Podlewska-Gaca, E., Marciniak, A., Alí-Lagoa, V., Bartczak, P., Müller, T. G., Szakáts, R., Duffard, R., Molnár, L., Pál, A., Butkiewicz-Bąk, M., Dudziński, G., Dziadura, K., Antonini, P., Asenjo, V., Audejean, M., Benkhaldoun, Z., Behrend, R., Bernasconi, L., Bosch, J. M., Chapman, A., Dintinjana, B., Farkas, A., Ferrais, M., Geier, S., Grice, J., Hirsh, R., Jacquinot, H., Jehin, E., Jones, A., Molina, D., Morales, N., Parley, N., Poncy, R., Roy, R., Santana-Ros, T., Seli, B., Sobkowiak, K., Verebélyi, E., and Żukowski, K.

Abstract

Context. Thanks to the Gaia mission, it will be possible to determine the masses of approximately hundreds of large main belt asteroids with very good precision. We currently have diameter estimates for all of them that can be used to compute their volume and hence their density. However, some of those diameters are still based on simple thermal models, which can occasionally lead to volume uncertainties as high as 20–30%. Aims. The aim of this paper is to determine the 3D shape models and compute the volumes for 13 main belt asteroids that were selected from those targets for which Gaia will provide the mass with an accuracy of better than 10%. Methods. We used the genetic Shaping Asteroids with Genetic Evolution (SAGE) algorithm to fit disk-integrated, dense photometric lightcurves and obtain detailed asteroid shape models. These models were scaled by fitting them to available stellar occultation and/or thermal infrared observations. Results. We determine the spin and shape models for 13 main belt asteroids using the SAGE algorithm. Occultation fitting enables us to confirm main shape features and the spin state, while thermophysical modeling leads to more precise diameters as well as estimates of thermal inertia values. Conclusions. We calculated the volume of our sample of main-belt asteroids for which the Gaia satellite will provide precise mass determinations. From our volumes, it will then be possible to more accurately compute the bulk density, which is a fundamental physical property needed to understand the formation and evolution processes of small Solar System bodies.

336. (216) Kleopatra, a low density critically rotating M-type asteroid

Author

Marchis, F., Jorda, L., Vernazza, P., Brož, M., Hanuš, J., Ferrais, M., Vachier, F., Rambaux, N., Marsset, M., Viikinkoski, M., Jehin, E., Benseguane, S., Podlewska-Gaca, E., Carry, B., Drouard, A., Fauvaud, S., Birlan, M., Berthier, J., Bartczak, P., Dumas, C., Dudziński, G., Ďurech, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Fetick, R., Fusco, T., Grice, J., Kryszczynska, A., Lamy, P., Marciniak, A., Michalowski, T., Michel, P., Pajuelo, M., Santana-Ros, T., Tanga, P., Vigan, A., Witasse, O., Yang, B., Marchis, F., Jorda, L., Vernazza, P., Brož, M., Hanuš, J., Ferrais, M., Vachier, F., Rambaux, N., Marsset, M., Viikinkoski, M., Jehin, E., Benseguane, S., Podlewska-Gaca, E., Carry, B., Drouard, A., Fauvaud, S., Birlan, M., Berthier, J., Bartczak, P., Dumas, C., Dudziński, G., Ďurech, J., Castillo-Rogez, J., Cipriani, F., Colas, F., Fetick, R., Fusco, T., Grice, J., Kryszczynska, A., Lamy, P., Marciniak, A., Michalowski, T., Michel, P., Pajuelo, M., Santana-Ros, T., Tanga, P., Vigan, A., Witasse, O., and Yang, B.

Abstract

Context. The recent estimates of the 3D shape of the M/Xe-type triple asteroid system (216) Kleopatra indicated a density of ~5 g cm−3, which is by far the highest for a small Solar System body. Such a high density implies a high metal content as well as a low porosity which is not easy to reconcile with its peculiar “dumbbell” shape. Aims. Given the unprecedented angular resolution of the VLT/SPHERE/ZIMPOL camera, here, we aim to constrain the mass (via the characterization of the orbits of the moons) and the shape of (216) Kleopatra with high accuracy, hence its density. Methods. We combined our new VLT/SPHERE observations of (216) Kleopatra recorded during two apparitions in 2017 and 2018 with archival data from the W. M. Keck Observatory, as well as lightcurve, occultation, and delay-Doppler images, to derive a model of its 3D shape using two different algorithms (ADAM, MPCD). Furthermore, an N-body dynamical model allowed us to retrieve the orbital elements of the two moons as explained in the accompanying paper. Results. The shape of (216) Kleopatra is very close to an equilibrium dumbbell figure with two lobes and a thick neck. Its volume equivalent diameter (118.75 ± 1.40) km and mass (2.97 ± 0.32) × 1018 kg (i.e., 56% lower than previously reported) imply a bulk density of (3.38 ± 0.50) g cm−3. Such a low density for a supposedly metal-rich body indicates a substantial porosity within the primary. This porous structure along with its near equilibrium shape is compatible with a formation scenario including a giant impact followed by reaccumulation. (216) Kleopatra’s current rotation period and dumbbell shape imply that it is in a critically rotating state. The low effective gravity along the equator of the body, together with the equatorial orbits of the moons and possibly rubble-pile structure, opens the possibility that the moons formed via mass shedding.

337. Evidence for differentiation of the most primitive small bodies

Author

Carry, B., Vernazza, P., Vachier, F., Neveu, M., Berthier, J., Hanuš, J., Ferrais, M., Jorda, L., Marsset, M., Viikinkoski, M., Bartczak, P., Behrend, R., Benkhaldoun, Z., Birlan, M., Castillo-Rogez, J., Cipriani, F., Colas, F., Drouard, A., Dudziński, G. P., Desmars, J., Dumas, C., Ďurech, J., Fetick, R., Fusco, T., Grice, J., Jehin, E., Kaasalainen, M., Kryszczynska, A., Lamy, P., Marchis, F., Marciniak, A., Michalowski, T., Michel, P., Pajuelo, M., Podlewska-Gaca, E., Rambaux, N., Santana-Ros, T., Storrs, A., Tanga, P., Vigan, A., Warner, B., Wieczorek, M., Witasse, O., Yang, B., Carry, B., Vernazza, P., Vachier, F., Neveu, M., Berthier, J., Hanuš, J., Ferrais, M., Jorda, L., Marsset, M., Viikinkoski, M., Bartczak, P., Behrend, R., Benkhaldoun, Z., Birlan, M., Castillo-Rogez, J., Cipriani, F., Colas, F., Drouard, A., Dudziński, G. P., Desmars, J., Dumas, C., Ďurech, J., Fetick, R., Fusco, T., Grice, J., Jehin, E., Kaasalainen, M., Kryszczynska, A., Lamy, P., Marchis, F., Marciniak, A., Michalowski, T., Michel, P., Pajuelo, M., Podlewska-Gaca, E., Rambaux, N., Santana-Ros, T., Storrs, A., Tanga, P., Vigan, A., Warner, B., Wieczorek, M., Witasse, O., and Yang, B.

Abstract

Context. Dynamical models of Solar System evolution have suggested that the so-called P- and D-type volatile-rich asteroids formed in the outer Solar System beyond Neptune's orbit and may be genetically related to the Jupiter Trojans, comets, and small Kuiper belt objects (KBOs). Indeed, the spectral properties of P- and D-type asteroids resemble that of anhydrous cometary dust. Aims. We aim to gain insights into the above classes of bodies by characterizing the internal structure of a large P- and D-type asteroid. Methods. We report high-angular-resolution imaging observations of the P-type asteroid (87) Sylvia with the Very Large Telescope Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument. These images were used to reconstruct the 3D shape of Sylvia. Our images together with those obtained in the past with large ground-based telescopes were used to study the dynamics of its two satellites. We also modeled Sylvia's thermal evolution. Results. The shape of Sylvia appears flattened and elongated (a/b 1.45; a/c 1.84). We derive a volume-equivalent diameter of 271 ± 5 km and a low density of 1378 ± 45 kg m-3. The two satellites orbit Sylvia on circular, equatorial orbits. The oblateness of Sylvia should imply a detectable nodal precession which contrasts with the fully-Keplerian dynamics of its two satellites. This reveals an inhomogeneous internal structure, suggesting that Sylvia is differentiated. Conclusions. Sylvia's low density and differentiated interior can be explained by partial melting and mass redistribution through water percolation. The outer shell should be composed of material similar to interplanetary dust particles (IDPs) and the core should be similar to aqueously altered IDPs or carbonaceous chondrite meteorites such as the Tagish Lake meteorite. Numerical simulations of the thermal evolution of Sylvia show that for a body of such a size, partial melting was

338. New constraints on the physical properties and dynamical history of Centaur 174P/Echeclus.

Author

Rousselot, P, Kryszczyńska, A, Bartczak, P, Kulyk, I, Kamiński, K, Dudziński, G, Anderson, S E, Noyelles, B, and Guilbert-Lepoutre, A

Subjects
*GAS giants, *SMALL solar system bodies, *DUST
Abstract

Since 2005 December, recurrent outbursts have been observed for Centaur 174/P Echeclus, confirming it is an active object. Thanks to a large number of photometric data obtained between 2001 April and 2019 December, we were able to compute a shape model of this object. We obtain a sidereal rotation period P  = 26.785178 ± 10−6 h and six equally probable pole solutions, each with a large obliquity of the rotational axis (50° or more). We also find the object significantly elongated, with a semi-major axial ratio a / b  = 1.32 (and b / c ∼ 1.1 but this second ratio is poorly constrained by the photometric data). Additionally, we present a detailed analysis of the dust emission from the 2016 outburst. Different colour maps are presented that reveal a change in dust colour, which becomes bluer with increasing cometocentric distance. A blue ring-like structure around the nucleus clearly visible in the images obtained on October 4 in the V-R spectral interval points out that the innermost near nucleus region is considerably redder than the surrounding coma. Different jets are also apparent, the main one being oriented southward. A detailed dynamical study is done to investigate past and future orbital elements. These elements appear stable in the period ≈1200 CE to ≈2900 CE. For a period of 12 000 yr the main conclusion is that Echeclus' perihelion distance was greater than about 4 au, preventing it from following a typical cometary activity like a short-period comet. Close encounters with giant planets nevertheless prevent any study of orbital elements on longer timescale. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

341. Python, Google Sheets, and the Thesaurus for Graphic Materials for Efficient Metadata Project Workflows.

Author

Bartczak, Jeremy and Glendon, Ivey

Subjects
UNIVERSITIES & colleges, ANNIVERSARIES, METADATA, LIBRARY automation, PYTHON programming language, MANAGEMENT
Abstract

In 2017, the University of Virginia (U.Va.) will launch a two year initiative to celebrate the bicentennial anniversary of the University's founding in 1819. The U.Va. Library is participating in this event by digitizing some 20,000 photographs and negatives that document student life on the U.Va. grounds in the 1960s and 1970s. Metadata librarians and archivists are well-versed in the challenges associated with generating digital content and accompanying description within the context of limited resources. This paper describes how technology and new approaches to metadata design have enabled the University of Virginia's Metadata Analysis and Design Department to rapidly and successfully generate accurate description for these digital objects. Python's pandas module improves efficiency by cleaning and repurposing data recorded at digitization, while the lxml module builds MODS XML programmatically from CSV tables. A simplified technique for subject heading selection and assignment in Google Sheets provides a collaborative environment for streamlined metadata creation and data quality control. [ABSTRACT FROM AUTHOR]

Published
2017

342. Can philanthropy be networked and strategic?

Author

Bartczak, Lori and Scearce, Diana

Abstract

The article reports on the philanthropy model of the Barr Foundation in Boston, Massachusetts. It says that the charity group formed a fellowship programme in 2004 which promoted relationship building among fellows. It notes that the said initiative led to collaborative effort and created greater impact. INSET: WHY VPP DECIDED TO EXPERIMENT WITH NETWORKED PHILANTHROPY.

Published
2012

343. False Positive B-Cells Crossmatch after Prior Rituximab Exposure of the Kidney Donor

Author

Desoutter, Judith, Apithy, Marie-Joëlle, Bartczak, Ségolène, and Guillaume, Nicolas

Abstract

Crossmatching is essential prior to kidney transplantation to confirm compatibility between the donor and the recipient, particularly to prevent acute antibody-mediated rejection. An unexpected positive crossmatch may be obtained in recipients with an autoimmune disease or preexisting antibodies not detected by single-antigen bead array due to complement interference or who have been previously treated by desensitization protocols such as rituximab, antithymocyte globulin, or intravenous immunoglobulins. We report donor and recipient investigations that revealed unexpected positive B-cells crossmatch, probably due to donor cells, as the donor had received rituximab therapy shortly before organ harvesting, in a context of severe idiopathic thrombocytopenic purpura. We consequently detected unexpected Class II IgG complement-dependent cytotoxicity for all sera tested. Other laboratory investigations failed to elucidate the reasons for this recipient-related positivity.

Published
2016
Full Text
View/download PDF

345. Poster session 1: Wednesday 3 December 2014, 09:00-16:00 * Location: Poster area

Author

Tong, L, Huang, C, Ramalli, A, Tortoli, P, Luo, J, D'hooge, J, Tzemos, N, Mordi, I, Bishay, T, Bishay, T, Negishi, T, Hristova, K, Kurosawa, K, Bansal, M, Thavendiranathan, P, Yuda, S, Popescu, BA, Vinereanu, D, Penicka, M, Marwick, TH, study, SUCCOUR, Hamed, W, Kamel, MKA, Yaseen, RIY, El-Barbary, HSE, Nemes, A, Kis, O, Gavaller, H, Kanyo, E, Forster, T, Angelis, A, Vlachopoulos, C, Ioakimidis, N, Felekos, I, Chrysohoou, C, Aznaouridis, K, Abdelrasoul, M, Terentes, D, Ageli, K, Stefanadis, C, Kurnicka, K, Domienik-Karlowicz, J, Lichodziejewska, B, Goliszek, S, Grudzka, K, Krupa, M, Dzikowska-Diduch, O, Ciurzynski, M, Pruszczyk, P, Gual Capllonch, F, Lopez Ayerbe, J, Teis, A, Ferrer, E, Vallejo, N, Junca, G, Pla, R, Bayes-Genis, A, Schwaiger, JP, Knight, DS, Gallimore, A, Schreiber, BE, Handler, C, Coghlan, JG, Bruno, R M, Giardini, G, Malacrida, S, Catuzzo, B, Armenia, S, Brustia, R, Ghiadoni, L, Cauchy, E, Pratali, L, Kim, KH, Lee, KJ, Cho, JY, Yoon, HJ, Ahn, Y, Jeong, MH, Cho, JG, Park, JC, Cho, SK, Nastase, O, Enache, R, Mateescu, AD, Botezatu, D, Popescu, BA, Ginghina, C, Gu, H, Sinha, MD, Simpson, JM, Chowienczyk, PJ, Fazlinezhad, A, Tashakori Behesthi, AHMAD, Homaei, FATEME, Mostafavi, H, Hosseini, G, Bakaeiyan, M, Boutsikou, M, Petrou, E, Dimopoulos, A, Dritsas, A, Leontiadis, E, Karatasakis, G, Sahin, S T, Yurdakul, S, Yilmaz, N, Cengiz, B, Cagatay, Y, Aytekin, S, Yavuz, S, Karlsen, S, Dahlslett, T, Grenne, B, Sjoli, B, Smiseth, OA, Edvardsen, T, Brunvand, H, Nasr, G, Nasr, A, Eleraki, A, Elrefai, S, Mordi, I, Sonecki, P, Tzemos, N, Gustafsson, U, Naar, J, Stahlberg, M, Cerne, A, Capotosto, L, Rosato, E, D'angeli, I, Azzano, A, Truscelli, G, De Maio, M, Salsano, F, Terzano, C, Mangieri, E, Vitarelli, A, Renard, S, Najih, H, Mancini, J, Jacquier, A, Haentjens, J, Gaubert, JY, Habib, G, Caminiti, G, D'antoni, V, D'antoni, V, Cardaci, V, Cardaci, V, Conti, V, Conti, V, Volterrani, M, Volterrani, M, Ahn, J, Kim, DH, Lee, HO, Iliuta, L, Kim, SY, Ryu, S, Ko, CW, Pyun, YS, Yoon, SJ, Lo Iudice, F, Esposito, R, Lembo, M, Santoro, C, Ballo, PC, Mondillo, S, De Simone, G, Galderisi, M, Hwang, YM, Kim, JH, Kim, JH, Moon, KW, Yoo, KD, Kim, CM, Tagliamonte, E, Rigo, F, Cirillo, T, Caruso, A, Astarita, C, Cice, G, Quaranta, G, Romano, C, Capuano, N, Calabro', R, Zagatina, A, Zhuravskaya, N, Guseva, O, Huttin, O, Benichou, M, Voilliot, D, Venner, C, Micard, E, Girerd, N, Sadoul, N, Moulin, F, Juilliere, Y, Selton-Suty, C, Baron, T, Christersson, C, Johansson, K, Flachskampf, FA, Lee, S, Lee, J, Hur, S, Park, J, Yun, JY, Song, SK, Kim, WH, Ko, JK, Nyktari, E, Bilal, S, Ali, SA, Izgi, C, Prasad, SK, Aly, MFA, Kleijn, SAK, Kandil, HIK, Kamp, OK, Beladan, CC, Calin, A, Rosca, M, Craciun, AM, Gurzun, MM, Calin, C, Enache, R, Mateescu, A, Ginghina, C, Popescu, BA, Mornos, C, Mornos, A, Ionac, A, Cozma, D, Crisan, S, Popescu, I, Ionescu, G, Petrescu, L, Camacho, S, Gamaza Chulian, S, Carmona, R, Diaz, E, Giraldez, A, Gutierrez, A, Toro, R, Benezet, J, Antonini-Canterin, F, Vriz, O, La Carrubba, S, Poli, S, Leiballi, E, Zito, C, Careri, S, Caruso, R, Pellegrinet, M, Nicolosi, GL, Kong, W, Kyu, K, Wong, R, Tay, E, Yip, J, Yeo, TC, Poh, KK, Correia, M, Delgado, A, Marmelo, B, Correia, E, Abreu, L, Cabral, C, Gama, P, Santos, O, Rahman, MT, Borges, I P, Peixoto, ECS, Peixoto, RTS, Peixoto, RTS, Marcolla, VF, Okura, H, Kanai, M, Murata, E, Kataoka, T, Stoebe, S, Tarr, A, Pfeiffer, D, Hagendorff, A, Generati, G, Bandera, F, Pellegrino, M, Alfonzetti, E, Labate, V, Guazzi, M, Kuznetsov, VA, Yaroslavskaya, EI, Pushkarev, GS, Krinochkin, DV, Zyrianov, IP, Carigi, S, Baldazzi, F, Bologna, F, Amati, S, Venturi, P, Grosseto, D, Biagetti, C, Fabbri, E, Arlotti, M, Piovaccari, G, Rahbi, H, Bin Abdulhaq, A, Tleyjeh, I, Santoro, C, Galderisi, M, Costantino, MF, Tarsia, G, Innelli, P, Dores, E, Esposito, G, Matera, A, De Simone, G, Trimarco, B, Capotosto, L, Azzano, A, Mukred, K, Ashurov, R, Tanzilli, G, Mangieri, E, Vitarelli, A, Merlo, M, Gigli, M, Stolfo, D, Pinamonti, B, Antonini Canterin, F, Muca, M, D'angelo, GA, Scapol, S, Di Nucci, M, Sinagra, G, Behaghel, A, Feneon, D, Fournet, M, Thebault, C, Martins, RP, Mabo, P, Leclercq, C, Daubert, C, Donal, E, Davinder Pal, SINGH, Prakash Chand, NEGI, Sanjeev, ASOTRA, Rajeev, MERWAH, Ankur, DWIVED, Ram Gopal, SOOD, Mzoughi, K, Zairi, I, Jabeur, M, Ben Moussa, F, Ben Chaabene, A, Kamoun, S, Mrabet, K, Fennira, S, Zargouni, A, Kraiem, S, Demkina, AE, Hashieva, FM, Krylova, NS, Kovalevskaya, EA, Potehkina, NG, Zaroui, A, Ben Said, R, Smaali, S, Rekik, B, Ben Hlima, M, Mizouni, H, Mechmeche, R, Mourali, MS, Malhotra, A, Sheikh, N, Dhutia, H, Siva, A, Narain, R, Merghani, A, Millar, L, Walker, M, Sharma, S, Papadakis, M, Siam-Tsieu, V, Mansencal, N, Arslan, M, Deblaise, J, Dubourg, O, Zaroui, A, Rekik, B, Ben Said, R, Boudiche, S, Larbi, N, Tababi, N, Hannachi, S, Mechmeche, R, Mourali, MS, Mechmeche, R, Zaroui, A, Chalbia, T, Ben Halima, M, Rekik, B, Boussada, R, Mourali, MS, Chistyakova, M V, Govorin, AV, Radaeva, EV, Lipari, P, Bonapace, S, Valbusa, F, Rossi, A, Zenari, L, Lanzoni, L, Targher, G, Canali, G, Molon, G, Barbieri, E, Novo, G, Giambanco, S, Sutera, MR, Bonomo, V, Giambanco, F, Rotolo, A, Evola, S, Assennato, P, Novo, S, Budnik, M, Piatkowski, R, Kochanowski, J, Opolski, G, Chatzistamatiou, E, Mpampatseva Vagena, I, Manakos, K, Moustakas, G, Konstantinidis, D, Memo, G, Mitsakis, O, Kasakogias, A, Syros, P, Kallikazaros, I, Park, SM, Kim, SA, Kim, MN, Shim, WJ, Marketou, M, Parthenakis, F, Kalyva, N, Pontikoglou, CH, Maragkoudakis, S, Zacharis, E, Patrianakos, A, Maragoudakis, F, Papadaki, H, Vardas, P, Rodrigues, AC, Perandini, LA, Souza, TR, Sa-Pinto, AL, Borba, E, Arruda, AL, Furtado, M, Carvalho, F, Bonfa, E, Andrade, JL, Hlubocka, Z, Malinova, V, Palecek, T, Danzig, V, Kuchynka, P, Dostalova, G, Zeman, J, Linhart, A, Chatzistamatiou, E, Konstantinidis, D, Memo, G, Mpampatzeva Vagena, I, Moustakas, G, Manakos, K, Trachanas, K, Vergi, N, Feretou, A, Kallikazaros, I, Corut, H, Sade, LE, Ozin, B, Atar, I, Turgay, O, Muderrisoglu, H, Ledakowicz-Polak, A, Polak, L, Krauza, G, Zielinska, M, Szulik, M, Streb, W, Wozniak, A, Lenarczyk, R, Sliwinska, A, Kalarus, Z, Kukulski, T, Nogueira, MA, Branco, LM, Agapito, A, Galrinho, A, Borba, A, Teixeira, PP, Monteiro, AV, Ramos, R, Cacela, D, Cruz Ferreira, R, Guala, A, Camporeale, C, Tosello, F, Canuto, C, Ridolfi, L, Chatzistamatiou, E, Moustakas, G, Memo, G, Konstantinidis, D, Mpampatzeva Vagena, I, Manakos, K, Traxanas, K, Vergi, N, Feretou, A, Kallikazaros, I, Hristova, K, Marinov, R, Stamenov, G, Mihova, M, Persenska, S, Racheva, A, Plaskota, KJ, Trojnarska, O, Bartczak, A, Grajek, S, Ramush Bejiqi, RA, Retkoceri, R, Bejiqi, H, Beha, A, Surdulli, SH, Seya, M, Sasaoka, T, Hirasawa, K, Yoshikawa, S, Maejima, Y, Ashikaga, T, Hirao, K, Isobe, M, none, Dreyfus, J, Durand-Viel, G, Cimadevilla, C, Brochet, E, Vahanian, A, Messika-Zeitoun, D, Jin, CN, Fang, F, Meng, FX, Kam, K, Sun, JP, Tsui, GK, Wong, KK, Wan, S, Yu, CM, Lee, AP, Cho, I J, Chung, HM, Heo, R, Ha, SJ, Hong, GR, Shim, CY, Chang, HJ, Ha, JW, Chung, N, Moral, S, Gruosso, D, Galuppo, V, Teixido, G, Rodriguez-Palomares, JF, Gutierrez, L, Evangelista, A, Moral, S, Gruosso, D, Galuppo, V, Teixido, G, Rodriguez-Palomares, JF, Gutierrez, L, Evangelista, A, Moral, S, Gruosso, D, Galuppo, V, Teixido, G, Rodriguez-Palomares, JF, Gutierrez, L, Evangelista, A, Alexopoulos, Alexan, Dawson, David, Nihoyannopoulos, Petros, Zainal Abidin, H A, Ismail, JOHAN, Arshad, KAMAL, Ibrahim, ZUBIN, Lim, CW, Abd Rahman, E, Kasim, SAZZLI, Peteiro, J, Barrio, A, Escudero, A, Bouzas-Mosquera, A, Yanez, J, Martinez, D, Castro-Beiras, A, Scali, MC, Simioniuc, A, Mandoli, GE, Lombardo, A, Massaro, F, Di Bello, V, Marzilli, M, Dini, FL, Adachi, H, Tomono, J, Oshima, S, Merchan Ortega, G, Bravo Bustos, D, Lazaro Garcia, R, Sanchez Espino, AD, Macancela Quinones, JJ, Ikuta, I, Ruiz Lopez, MF, Valencia Serrano, FM, Bonaque Gonzalez, JC, Gomez Recio, M, Romano, G, D'ancona, G, Pilato, G, Di Gesaro, G, Clemenza, F, Raffa, G, Scardulla, C, Sciacca, S, Lancellotti, P, Pilato, M, Addetia, K, Takeuchi, M, Maffessanti, F, Weinert, L, Hamilton, J, Mor-Avi, V, Lang, RM, Sugano, A, Seo, Y, Watabe, H, Kakefuda, Y, Aihara, H, Nishina, H, Ishizu, T, Fumikura, Y, Noguchi, Y, Aonuma, K, Luo, XX, Fang, F, Lee, APW, Shang, Q, Yu, CM, Sammut, E C, Chabinok, R, Jackson, T, Siarkos, M, Lee, L, Carr-White, G, Rajani, R, Kapetanakis, S, Byrne, D, Walsh, JP, Ellis, L, Mckiernan, S, Norris, S, King, G, Murphy, RT, Hristova, K, Katova, TZ, Simova, I, Kostova, V, Shuie, I, Ferferieva, V, Bogdanova, V, Castelon, X, Nemes, A, Sasi, V, Domsik, P, Kalapos, A, Lengyel, C, Orosz, A, Forster, T, Grapsa, J, Demir, O, Dawson, D, Sharma, R, Senior, R, Nihoyannopoulos, P, Pilichowska, E, Zaborska, B, Baran, J, Stec, S, Kulakowski, P, Budaj, A, Herrera, J E, Palacios, I F, Mendoza, I, Marquez, J A, Herrera, J A, Octavio, J A, Dempaire, G, Rotolo, M, Kosmala, W, Kaye, G, Saito, M, Negishi, K, Marwick, TH, Maceira Gonzalez, A M, Ripoll, C, Cosin-Sales, J, Igual, B, Salazar, J, Belloch, V, Dulai, R S, Taylor, A, and Gupta, S

Abstract

Purpose: We have previously demonstrated that multi-line transmit (MLT) beam forming can provide high quality full field-of-view (90° sector) B-mode images at very high frame rates, i.e. up to 500 fps. The purpose of this study was to test the feasibility of this technique in imaging the mechanical intraventricular waves such as the one associated with activation of the left ventricle. Methods: A dedicated pulse sequence using MLT was implemented on the ULA-OP research scanner equipped with a 2.0 MHz phased array to obtain 90° sector images at a frame rate of 436 fps. The left ventricle of a healthy volunteer was imaged from the apical 4 chamber view and the RF data was acquired. Subsequently, the strain rate was extracted from the RF data using a normalized cross-correlation method. Results: As expected, during the early filling phase, myocardium lengthening (positive strain rate) was observed propagating from the base of the septum to the apex and back (Figure a). A similar wave was detected in the lateral wall, although a brief shortening (negative strain rate) was detected in the mid-wall which could be the result of reverberations (Figure b). During isovolumetric contraction, the septal wall shortened before the lateral wall (as expected) - moreover - there seemed to be an intra-wall base-apex shortening gradient (Figure c and d). Conclusions: Our preliminary results show that visualization of the cardiac mechanical activation could be feasible using MLT based high frame rate imaging. Further research is required to examine this in depth, which is the topic of on-going work. Figure Curved M-mode of strain rate

Published
2014
Full Text
View/download PDF

346. Poster session 5: Friday 5 December 2014, 14:00-18:00 * Location: Poster area

Author

Turco, A, Duchenne, J, Nuyts, J, Gheysens, O, Voigt, J-U, Claus, P, Vunckx, K, Muhtarov, K, Ozer, N, Turk, G, Sunman, H, Karakulak, U, Sahiner, L, Kaya, B, Yorgun, H, Hazirolan, T, Aytemir, K, Warita, S, Kawasaki, M, Tanaka, R, Houle, H, Yagasaki, H, Nagaya, M, Ono, K, Noda, T, Watanabe, S, Minatoguchi, S, Kyle, AS, Dauphin, C, Lusson, J R, Dragoi Galrinho, R, Rimbas, RC, Ciobanu, AO, Marinescu, B, Cinteza, M, Vinereanu, D, 28343/04.11.2013, number, Medicine, Funding Authority: University of, Davila, Pharmacy Carol, "Young Researchers" Projects – 2013, Buchar, Dragoi Galrinho, R, Ciobanu, AO, Rimbas, RC, Marinescu, B, Cinteza, M, Vinereanu, D, 159/1.5/S/138907, Grant POSDRU, Aparina, O, Stukalova, O, Butorova, E, Makeev, M, Bolotova, M, Parkhomenko, D, Golitsyn, SP, Zengin, E, Hoffmann, B A, Ramuschkat, M, Ojeda, F, Weiss, C, Willems, S, Blankenberg, S, Schnabel, R B, Sinning, C R, Schubert, U, Suhai, F I, Toth, A, Kecskes, K, Czimbalmos, CS, Csecs, I, Maurovich-Horvat, P, Simor, T, Merkely, B, Vago, H, Slawek, D, Chrzanowski, L, Krecki, R, Binkowska, A, Kasprzak, J D, Palombo, C, Morizzo, C, Kozakova, M, Biering-Sorensen, T, Mogelvang, R, Jensen, JS, Charisopoulou, DC, Koulaouzidis, GK, Rydberg, AR, Henein, MH, Kovacs, A, Olah, A, Lux, A, Matyas, C, Nemeth, BT, Kellermayer, D, Ruppert, M, Birtalan, E, Merkely, B, Radovits, T, Sengelov, M, Biering-Sorensen, T, Jorgensen, PG, Bruun, NE, Fritz-Hansen, T, Bech, J, Olsen, FJ, Sivertsen, J, Jensen, JS, Henri, C, Dulgheru, R, Magne, J, Kou, S, Davin, L, Nchimi, A, Oury, C, Pierard, L, Lancellotti, P, Sahin, S T, Cengiz, B, Yurdakul, S, Altuntas, E, Aytekin, V, Aytekin, S, Bajraktari, G, Ibrahimi, P, Bytyci, I, Ahmeti, A, Batalli, A, Elezi, S, Henein, MY, Pavlyukova, EN, Tereshenkova, EK, Karpov, RS, Barbier, P, Mirea, O, Guglielmo, M, Savioli, G, Cefalu, C, Maltagliati, MC, Tumasyan, LR, Adamyan, KG, Chilingaryan, AL, Tunyan, LG, Kowalik, E, Klisiewicz, A, Biernacka, EK, Hoffman, P, Park, CS, Yi, JEY, Cho, JSC, Ihm, SHI, Kim, HYK, Cho, EJC, Jeon, HKJ, Jung, HOJ, Youn, HJY, Mcghie, JS, Menting, ME, Vletter, WB, Roos-Hesselink, JW, Geleijnse, ML, Van Der Zwaan, H, Van Den Bosch, A, Spethmann, S, Baldenhofer, G, Stangl, V, Baumann, G, Stangl, K, Laule, M, Dreger, H, Knebel, F, Erdei, T, Edwards, J, Braim, D, Yousef, Z, Fraser, AG, Cardiff, Investigators, MEDIA, Keramida, K, Kouris, N, Kostopoulos, V, Kostakou, P, Petrogiannos, CH, Olympios, CD, Bajraktari, G, Berisha, G, Bytyci, I, Ibrahimi, P, Rexhepaj, N, Henein, MY, Wdowiak-Okrojek, K, Shim, A, Wejner-Mik, P, Szymczyk, E, Michalski, B, Kasprzak, JD, Lipiec, P, Tarr, A, Stoebe, S, Pfeiffer, D, Hagendorff, A, Haykal, M, Ryu, SK, Park, JY, Kim, SH, Choi, JW, Goh, CW, Byun, YS, Choi, JH, Sonoko, M, Onishi, T, Fujimoto, W, Yamada, S, Taniguchi, Y, Yasaka, Y, Kawai, H, Okura, H, Sakamoto, Y, Murata, E, Kanai, M, Kataoka, T, Kimura, T, Watanabe, N, Kuriyama, N, Nakama, T, Furugen, M, Sagara, S, Koiwaya, H, Ashikaga, K, Matsuyama, A, Shibata, Y, Meimoun, P, Abouth, S, Martis, S, Boulanger, J, Elmkies, F, Zemir, H, Tzvetkov, B, Luycx-Bore, A, Clerc, J, Galli, E, Oger, E, Guirette, Y, Daudin, M, Fournet, M, Donal, E, Galli, E, Guirette, Y, Mabo, P, Donal, E, Keramida, K, Kouris, N, Kostopoulos, V, Psarrou, G, Petrogiannos, CH, Hatzigiannis, P, Olympios, CD, Igual Munoz, B, Erdociain Perales, MEP, Maceira Gonzalez Alicia, AMG, Vazquez Sanchez, ALEJAN, Miro Palau, VMP, Alonso Fernandez, PAF, Donate Bertolin, LDB, Estornell Erill, JEE, Cervera, AC, Montero Argudo Anastasio, AMA, Okura, H, Koyama, T, Maehama, T, Imai, K, Yamada, R, Kume, T, Neishi, Y, Caballero Jimenez, L, Garcia-Navarro, M, Saura, D, Oliva, MJ, Gonzalez-Carrillo, J, Espinosa, MD, Valdes, M, De La Morena, G, Venkateshvaran, A, Sola, S, Dash, P K, Annappa, C, Manouras, A, Winter, R, Brodin, LA, Govind, S C, Laufer-Perl, LM, Topilsky, Y, Stugaard, M, Koriyama, H, Katsuki, K, Masuda, K, Asanuma, T, Takeda, Y, Sakata, Y, Nakatani, S, Marta, L, Abecasis, J, Reis, C, Dores, H, Cafe, H, Ribeiras, R, Andrade, MJ, Mendes, M, Goebel, B, Hamadanchi, A, Schmidt-Winter, C, Otto, S, Jung, C, Figulla, HR, Poerner, TC, Kim, D-H, Sun, BJ, Jang, JY, Choi, HN, Song, J-M, Kang, D-H, Song, J-K, Zakhama, L, Slama, I, Boussabah, E, Antit, S, Herbegue, B, Annabi, MS, Jalled, A, Ben Ameur, W, Thameur, M, Ben Youssef, S, O' Grady, H, Gilmore, M, Delassus, P, Sturmberger, T, Ebner, C, Aichinger, J, Tkalec, W, Eder, V, Nesser, HJ, Caggegi, A M, Scandura, S, Capranzano, P, Grasso, C, Mangiafico, S, Ronsivalle, G, Dipasqua, F, Arcidiacono, A, Cannata, S, Tamburino, C, Chapman, M, Henthorn, RENEE, Surikow, S, Zoontjens, J, Stocker, B, Mclean, T, Zeitz, C J, Fabregat Andres, O, Estornell-Erill, J, Ridocci-Soriano, F, De La Espriella, R, Albiach-Montanana, C, Trejo-Velasco, B, Perdomo-Londono, D, Facila, L, Morell, S, Cortijo-Gimeno, J, Kouris, N, Keramida, K, Kostopoulos, V, Psarrou, G, Kostakou, P, Olympios, CD, Kuperstein, R, Blechman, I, Freimatk, D, Arad, M, Ochoa, J P, Fernandez, A, Vaisbuj, F, Salmo, F, Fava, AM, Casabe, H, Guevara, EG, Fernandes, A, Cateano, F, Almeida, I, Silva, J, Trigo, J, Botelho, A, Sanches, C, Venancio, M, Goncalves, L, Schnell, F, Daudin, M, Oger, E, Bouillet, P, Mabo, P, Carre, F, Donal, E, Petrella, L, Fabiani, D, Paparoni, S, De Remigis, F, Tomassoni, G, Prosperi, F, Napoletano, C, Marchel, M, Serafin, A, Kochanowski, J, Steckiewicz, R, Madej-Pilarczyk, A, Filipiak, KJ, Opolski, G, Abid, L, Ben Kahla, S, Charfeddine, S, Kammoun, S, Monivas Palomero, V, Mingo Santos, S, Goirigoizarri Artaza, J, Rodriguez Gonzalez, E, Restrepo Cordoba, A, Rivero Arribas, B, Garcia Lunar, I, Gomez Bueno, M, Sayago Silva, I, Segovia Cubero, J, Zengin, E, Radunski, U K, Klusmeier, M, Ojeda, F, Rybczynski, M, Barten, M, Muellerleile, K, Reichenspurner, H, Blankenberg, S, Sinning, C R, Romano, G, Licata, P, Tuzzolino, F, Clemenza, F, Di Gesaro, G, Hernandez Baravoglia, C, Scardulla, C, Pilato, M, Hashimoto, G, Suzuki, M, Yoshikawa, H, Otsuka, T, Isekame, Y, Iijima, R, Hara, H, Nakamura, M, Sugi, K, Melnikova, MA, Krestjyaninov, MV, Ruzov, VI, Magnino, C, Omede', P, Avenatti, E, Presutti, D, Moretti, C, Ravera, A, Sabia, L, Gaita, F, Veglio, F, Milan, A, Magda, SL, Mincu, RI, Soare, A, Mihai, CM, Florescu, M, Mihalcea, D, Cinteza, M, Vinereanu, D, POSDRU/159/1.5/S/141531, Grant, 112/2011, grant CNCSIS, Chatzistamatiou, E, Mpampatseva Vagena, I, Manakos, K, Moustakas, G, Konstantinidis, D, Memo, G, Mitsakis, O, Kasakogias, A, Syros, P, Kallikazaros, I, Petroni, R, Acitelli, A, Cicconetti, M, Di Mauro, M, Altorio, SF, Romano, S, Petroni, A, Penco, M, Apostolovic, S, Stanojevic, D, Jankovic-Tomasevic, R, Salinger-Martinovic, S, Pavlovic, M, Djordjevic-Radojkovic, D, Tahirovic, E, Dungen, HD, ELD, CIBIS, Jung, I H, Byun, Y S, Goh, C W, Kim, B O, Rhee, K J, Lee, D S, Kim, M J, Seo, H S, Kim, H Y, Tsverava, M, Tsverava, D, Zaletova, T, Shamsheva, D, Parkhomenko, O, Bogdanov, A, Derbeneva, S, Leotescu, A, Tudor, I, Gurghean, A, Bruckner, I, Plaskota, KJ, Trojnarska, O, Bartczak, A, Grajek, S, Sharma, P, Sharma, D, Garg, S, Vazquez Lopez-Ibor, J, Monivas Palomero, V, Solano-Lopez, JM, Zegri Reiriz, I, Dominguez Rodriguez, F, Gonzalez Mirelis, J, Mingo Santos, S, Sayago, I, Garcia Pavia, P, Segovia Cubero, J, Konecny, T, Noseworthy, P, Kapa, S, Cooper, LT, Mulpuru, SK, Asirvatham, S, Florescu, M, Mihalcea, D, Magda, S, Radu, E, Chirca, A, Acasandrei, AM, Jinga, D, Mincu, R, Enescu, OA, Vinereanu, D, 112/2011, no., PN-II-ID-PCE-2011-3-0791, Saura Espin, D, Caballero Jimenez, L, Oliva Sandoval, MJ, Gonzalez Carrillo, J, Garcia Navarro, M, Espinosa Garcia, MD, Valdes Chavarri, M, De La Morena Valenzuela, G, Abul Fadl, AAM, Mourad, MM, team, Primary care Echocardiography, Campanale, C M, Di Maria, S, Mega, S, Nusca, A, Marullo, F, Di Sciascio, G, Pardo Gonzalez, L, Delgado, M, Ruiz, M, Rodriguez, S, Hidalgo, F, Ortega, R, Mesa, D, Suarez De Lezo Cruz Conde, J, Bengrid, T M, Zhao, Y, Henein, MY, Kenjaev, S, Alavi, AL, Kenjaev, ML, Mendes, LM, Lima, S, Dantas, C, Melo, I, Madeira, V, Balao, S, Alves, H, Baptista, E, Mendes, P, Santos, JF, Scali, MC, Mandoli, GE, Simioniuc, A, Massaro, F, Di Bello, V, Marzilli, M, Dini, FL, Cifra, B, Dragulescu, A, Friedberg, MK, Mertens, L, Scali, MC, Bayramoglu, A, Tasolar, H, Otlu, YO, Hidayet, S, Kurt, F, Dogan, A, Pekdemir, H, Stefani, L, Galanti, GG, De Luca, ADL, Toncelli, LT, Pedrizzetti, GP, Gopal, A S, Saha, SK, Toole, RS, Kiotsekoglou, A, Cao, JJ, Reichek, N, Ho, S-J, Hung, S-C, Chang, F-Y, Liao, J-N, Niu, D-M, Yu, W-C, Nemes, A, Kalapos, A, Domsik, P, Forster, T, Siarkos, M, Sammut, E, Lee, L, Jackson, T, Carr-White, G, Rajani, R, Kapetanakis, S, Jarvinen, VM, Sipola, P, Madeo, A, Piras, P, Evangelista, A, Giura, G, Dominici, T, Nardinocchi, P, Varano, V, Chialastri, C, Puddu, PE, Torromeo, C, Sanchis Ruiz, L, Montserrat, S, Obach, V, Cervera, A, Bijnens, B, Sitges, M, Charisopoulou, D, Banner, N R, Rahman-Haley, S, Kim, BJ, Kang, JG, Lee, SH, Sung, KC, Kim, BS, Kang, JH, Lee, ES, Imperadore, F, Del Greco, M, Jermendy, AL, Horcsik, DV, Horvath, T, Celeng, C, Nagy, E, Bartykowszki, A, Tarnoki, DL, Merkely, B, Maurovich-Horvat, P, Jermendy, G, Whitaker, J, Demir, OM, Walton, J, Wragg, A, Alfakih, K, Karolyi, M, Szilveszter, B, Raaijmakers, R, Giepmans, W, Horvath, T, Merkely, B, Maurovich-Horvat, P, Koulaouzidis, GK, Charisopoulou, DC, Mcarthur, TM, Jenkins, PJJ, Henein, MH, Silva, T, Ramos, R, Oliveira, M, Marques, H, Cunha, P, Silva, MN, Barbosa, C, Sofia, A, Pimenta, R, Ferreira, RC, Al-Mallah, M, and Alsaileek, A

Abstract

Clinical PET acquisitions of the heart suffer from artefacts and drops in image quality due to the poor spatial resolution of the PET system. Moreover, cardiac PET images are further degraded by the blur caused by the breathing and beating motions, thus hampering diagnosis and evaluation of myocardial pathologies. Anatomy-enhanced PET reconstruction, using a high-resolution CT, has proven useful in brain imaging. In cardiac datasets however, due to the motion artefacts, the application of any restoring technique on datasets affected by motion blur needs to be preceded by the validation of the proposed method on realistic static datasets. In this work, the validation is performed using static cardiac ex vivo datasets obtained from a number of sacrificed sheep, scanned on a clinical PET/CT scanner. The aim of this work is to assess the effectiveness of reconstructions of the acquired datasets with different CT-based anatomical priors, in comparison to reconstructions currently applied in clinical practise. The gold standard to which all reconstructions are compared consists of images of the same hearts scanned on a small-animal PET scanner, whose high spatial resolution allows for almost artefact-free images. Encouraging results were obtained so far, with improvements in volume delineation and uniformity of activity values when anatomical information was used. Fig 1 shows the gold standard image (left) compared to a regular clinical reconstruction (middle) and to a reconstruction using the high-resolution CT as anatomical information (right). Figure

Published
2014
Full Text
View/download PDF

347. Moderated Posters session * Congenital heart disease: 12/12/2013, 14:00-18:00 * Location: Moderated Poster area

Author

Bartczak, A, Plaskota, K, Trojnarska, O, Szczepaniak-Chichel, L, Popiel, M, Grajek, S, Eindhoven, J A, Van Den Bosch, AE, Ruys, TPE, Opic, P, Cuypers, JAAE, Mc Ghie - Vletter, JS, Witsenburg, M, Boersma, H, Roos-Hesselink, JW, Carro, A, Sanz, M, Galuppo, V, Maldonado, G, Santos, A, Miranda, B, Huguet, F, Gonzalez, N, Abad, C, Evangelista, A, Eindhoven, J A, Van Den Bosch, AE, Menting, ME, Cuypers, JAAE, Witsenburg, M, Vletter- Mcghie, JS, Ruys, PTE, Boermsa, H, Roos-Hesselink, JW, Dragulescu, A, Mroczek, D, Chaturvedi, R, Benson, L, Friedberg, MK, Mertens, L, Nastase, OA, Enache, R, Popescu, BA, Botezatu, D, Aschie, D, State, S, Rosca, M, Calin, A, Beladan, C, Ginghina, C, Huang, FQ, Zhong, L, Tan, JL, Le, TT, Tan, RS, Pietrzak, R, Werner, B, Scognamiglio, G, Karonis, T, Gatzoulis, MA, Babu-Narayan, SV, Li, W, Gonzalez-Gonzalez, AM, Alonso-Gonzalez, R, West, C, Senior, R, and Li, W

Abstract

Background: Surgical correction of aortic coarctation (CoAo) has been successfully performed for over half of the century but life expectancy of these patients remains reduced due to increased aortic stiffness leading to adverse left ventricular remodeling and end-organ damage. The role of tissue doppler imaging (TDI), in particular assessment of long axis dysfunction (LAD) defined as septal mitral annulus pulsed-wave early diastolic velocity E’≤8cm/s, in the evaluation of left ventricle diastolic dysfunction has been proved. Aim of the study: was to evaluate left ventricle diastolic function in relation to pre-coarctation aortic stiffness and arterial elastic properties and to determine relationship between left ventricle diastolic dysfunction and clinical findings in adult patients after aortic coarctation repair. Methods: Eighty-two subjects after CoAo repair (53 males) aged 33 (18-60 years) operated on at the age of 9 (1-44years) and 20 controls (8 males) aged 30 (21-46 years) were enrolled in the study. Detailed echocardiographic examination with evaluation of mitral inflow and TDI parameters (E’, A’, S’ from septal and lateral mitral annulus) was performed. Following vascular parameters were determined: central: augmentation pressure (AP), augmentation index (AI) as well as peripheral: pulse wave velocity (PVW), flow-mediated dilation (FMD), nitroglycerin-mediated dilation (NMD) and intima-media thickness (IMT). Results: LAD was observed in 27 (32,9%) patients. They were older (p=0,0007), also older at the time of surgery (p=0,01) compared to non-LAD patients. The groups did not differ in respect to presence of arterial hypertension (AH), bicuspid aortic valve (BAV) or significant gradient through descending aorta (AoD+). Analysis of vascular and echocardiographic parameters revealed increased AP (p=0,005), AI (p=0,01) and IMT (p=0,001) as well as larger left atria (LA) (p=0,0001) and thicker left ventricle walls (interventricular septum, p=0,004; posterior wall, p=0,02) in the LAD patients in comparison to non-LAD group. Univariate logistic regression analysis proved increased IMT (p=0,001), AP (p=0,007), AI (p=0,01) as well as older age (p=0,002) and older age at surgery (p=0,008) to increase LAD probability. Conclusions: Left ventricle diastolic function is reduced in patients after CoAo repair. Increased pre-coarctation aortic stiffness and loss of arterial elastic properties as well as patient’s age and older age at surgery impair left ventricle diastolic function.

Published
2013
Full Text
View/download PDF

348. Functional nanoparticles in cells

Author

Bartczak, Dorota, Muskens, Otto L., Nitti, Simone, Sanchez-Elsner, Tilman, Millar, Timothy M., and Kanaras, Antonios G.

Abstract

In this paper we present an overview of our recent studies regarding the interactions of functional nanoparticles with the human umbilical endothelial cells (HUVECs). Cellular uptake, cytotoxicity and laser hyperthermia of cells loaded with gold nanoparticles are discussed. Particles with different shape, size and charge are compared and evaluated to conclude at the most appropriate types for specific biomedical applications (i.e. drug delivery, laser hyperthermia).

Published
2012
Full Text
View/download PDF

349. ChemInform Abstract: Conversion of 3‐Arylphthalides into Anthrones with a Methylcarbonyl Substituent at the C‐10 Position.

Author

Bieniek, Adam, Bartczak, Monika M., and Epsztajn, Jan

Abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Published
2009
Full Text
View/download PDF

350. Application of Organolithium and Related Reagents in Synthesis. Part 31. Effective Conversion of 3‐Arylphthalides into 2‐(1‐Aryl‐3‐oxo‐4‐alkoxycarbonylbutyl)benzoic Acids.

Author

Bieniek, Adam, Kulikiewicz, Krystyna K., and Bartczak, Monika M.

Abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Published
2007
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results