bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mondini dysplasia and recurrent bacterial meningitis in a girl with relapsing Langerhans cell histiocytosis
Authors: Kitazawa Katsuhiko , Matsumoto Marika , Senda Masayoshi , Honda Akihito , Morimoto Noriko , Kawashiro Nobuko , Imashuku Shinsaku 
Published: May 2004

AbstractWe report a case of a girl with Langerhans cell histiocytosis (LCH) of multifocal bone disease, who developed recurrent bacterial meningitis and unilateral sensorineural hearing loss during the relapsing course of the disease. Mondini dysplasia, a congenital inner ear anomaly, was suspected by high resolution computed tomographic scan and the dysplasia with cerebrospinal fluid leakage was confirmed by surgery in the ipsilateral ear showing hearing loss. Although rare, congenital inner ear anomalies such as Mondini dysplasia should be kept in mind in pediatric patients with hearing impairment and/or recurrent bacterial meningitis during chemotherapy for various types of neoplasms including LCH. © 2004 Wiley‐Liss, Inc.
CD19 negative precursor B acute lymphoblastic leukemia presenting with hypercalcemia
Authors: Sultan Iyad , Kraveka Jacqueline M. , Lazarchick John 
Published: May 2004

AbstractA 9‐month‐old infant presented with hypercalcemia and lytic bone lesions. Suspicion for malignancy led to a bone marrow examination, which showed replacement of the marrow by a small round blue cell infiltrate. Flow cytometric analysis of these cells showed an unusual immunophenotype in that these cells were dim CD45, HLA‐DR, and CD10 positive, but CD19, CD20, CD79a, and CD34 negative. Southern blotting showed clonal rearrangement of immunoglobulin heavy chain (IgH) which confirmed a diagnosis of precursor B acute lymphoblastic leukemia (ALL). He received supportive treatment with hydration and pamidronate, but had recurrent episodes of hypercalcemia. Once the correct diagnosis of ALL was established, the patient was treated with an infantile ALL chemotherapeutic regimen and the hypercalcemia resolved. This case highlights the usefulness of immunoglobulin gene rearrangement studies in atypical cases of ALL. © 2004 Wiley‐Liss, Inc.
Ein Pionier der Raumfahrt
Authors: Loos Andreas 
Published: April 2004

AbstractGeschichten über seine Person muss man in der Regel mit Vorsicht genießen. Schließlich war der gesuchte Raketenforscher ein begabter Selbstdarsteller, der schon seine ersten größeren Versuche zu öffentlichen Flugschauen machte — und dafür Eintrittsgeld nahm.
Von Kristallen und Zellwänden
Authors: Vilgis Thomas A. 
Published: April 2004

AbstractErdbeerzeit! Die leuchtend roten und saftigen Früchte verführen zum heftigsten Naschen, und die zu kurze Saison der Vitaminbomben wirft immer wieder die Frage auf, ob dieser Genuss durch moderne Technik verlängert werden kann. Der Versuch, Erdbeeren als ganze Früchte einzufrieren und diese aus der Kühltruhe in alter Frische hervorzuzaubern ist zwar bestechend, aber zum Scheitern verurteilt.
Phase behaviors of hyperbranched solid polymer electrolyte/salt systems: The structure effect
Authors: Ko Sung Jin , Bae Young Chan , Kong Sung‐Ho , Ryu Si‐Ok 
Published: April 2004

AbstractWe have derived a new molecular thermodynamic model based on the lattice cluster model and melting point depression theory to account for the structural effect on phase behaviors of hyperbranched solid polymer electrolyte/salt systems. The two structural parameters (the generation number and separator length) are introduced to characterize the architecture of the hyperbranched polymer. A thermooptical analysis technique is used to determine the melting points of hyperbranched polymer/ZnI2 systems. Our results show that the eutectic point is presented at a higher weight fraction of the salt as the generation number increases. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 2254–2262, 2004
Factors driving the protonation of poly(N‐vinylimidazole) hydrogels
Authors: Molina M. Jesús , Gómez‐Antón M. Rosa , Piérola Inés F. 
Published: May 2004

AbstractPoly(N‐vinylimidazole) hydrogels immersed in aqueous acid solutions produce an increment in the pH of the bath because of proton uptake by basic imidazole moieties, leading to hydrogel protonation. Both kinetic and equilibrium measurements of the pH of the bath have been performed under a variety of conditions and with different hydrogel samples. The kinetics of the xerogel protonation process (which includes solvent and titrant diffusion, the true protonation reaction or ion–dipole association, and the polymer relaxation to a new conformation) are mostly driven by the size of the hydrogel sample, whereas other magnitudes, such as the initial pH, the effective polymer concentration, and the network structure, governed by the crosslinker ratio and total comonomer concentration in the feeding, have a minor influence. pKa changes with the degree of protonation (α), delimitating two different regions: (1) a broad α range in which pKa decreases with increasing α but less pronouncedly with increasing ionic strength and (2) an α range close to α = 1 in which pKa decreases abruptly, more markedly with sulfate than with chloride counteranions and with larger ionic strengths. In the first region, pKa is determined by repulsive electrostatic interactions and so is larger for titration with H2SO4 than with HCl and increases as the effective polymer concentration and ionic strength increase. Two steps (i.e., two protonation sites) can be observed in the titration curves, the second one corresponding to abrupt changes in the basicity of the second pKa‐versus‐α region. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 2294–2307, 2004
Pre‐treatment factors related to cognitive functioning in women newly diagnosed with breast cancer
Authors: Cimprich Bernadine , So Heeyoung , Ronis David L. , Trask Christine 
Published: April 2004

AbstractWomen treated for breast cancer have shown cognitive deficits with reduced capacity to focus and concentrate or to direct attention. This study examined the relationship between cognitive function prior to any treatment for breast cancer and individual factors including age, education, menopausal status, chronic health problems, and distress. Women newly diagnosed with breast cancer (N=184), ages 27–86 years, were assessed with standardized attention tests, self‐reports of effectiveness in cognitive functioning, and measures of distress at about 18 days before surgery. Measured performance on the cognitive tests was not significantly correlated to self‐reports of effectiveness in cognitive functioning. Age, education, presence of a chronic health problem, and menopausal status, but not distress, were associated with performance on the cognitive tests. Only age and education, however, were significant (p<0.001) predictors of overall performance on the cognitive tests, when controlling covariates. In contrast, symptom and mood distress significantly (p<0.001) predicted perceptions of effectiveness in cognitive functioning. Thus, different factors were associated with measured performance versus self‐reports of cognitive functioning. Individual factors that predispose to lowered effectiveness in cognitive functioning prior to treatment in women newly diagnosed with breast cancer are discussed. Copyright © 2004 John Wiley & Sons, Ltd.
Endothelin A receptor blockade does not alter PSA secretion in prostate cancer cell lines
Authors: Pecher Stefana , Pflug Beth R. , Brink Alisa K.W. , Nelson Joel B. 
Published: May 2004

AbstractBACKGROUNDSome men treated with atrasentan (ABT‐627), an endothelin A (ETA) receptor inhibitor, had declines in their serum PSA levels. It is our hypothesis that this decrease is due to anti‐tumoral activity and not a reduction in PSA secretion at the cellular level.METHODSTwo PSA secreting prostate cancer cell lines (LAPC4 and LNCaP) were treated with atrasentan and an ETB receptor antagonist (A192621) in varying concentrations (10−6–10−10 M) and PSA levels were measured in the culture media.RESULTSLNCaP and LAPC4 cells both express ETA receptors. Neither the ETA or ETB antagonist altered PSA secretion, while addition of DHT, a positive control, produced a marked increase in PSA secretion.CONCLUSIONSBlockade of the ETA receptor does not affect the secretion of PSA in prostate cancer cell lines. © 2004 Wiley‐Liss, Inc.
Electron momentum density of hexagonal cadmium studied by Compton scattering
Authors: Reniewicz H. , Andrejczuk A. , Brancewicz M. , Żukowski E. , Dobrzyński L. , Kaprzyk S. 
Published: May 2004

AbstractThe directional electron momentum density distributions (Compton profiles) of single‐crystal cadmium have been measured in transmission and reflection experimental geometries using high‐energy (662 keV) gamma radiation from a 137Cs isotope source. Profiles along the [100] and [110] directions in reciprocal space were measured in both geometries, whereas only the transmission geometry was used for the measurements along the [001] direction. The experimental data have been compared with corresponding theoretical KKR semi‐relativistic calculations. The directional difference profiles, both experimental and theoretical, show, similarly to other hexagonal systems, very small anisotropy of the electron momentum density in hexagonal cadmium, about 0.3%, i.e. less than half of that presented in the literature for cubic systems. Minor discrepancies between KKR calculations and experiment probably occur due to the necessity to introduce an anisotropic electron–electron correlation correction. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Dielectric properties and absorption spectra of trimethylammonium trichlorcobaltate dihydrate single crystals
Authors: Kapustianik V. , Batiuk A. , Dacko S. 
Published: May 2004

AbstractThe dielectric and spectral properties of [NH(CH3)3]CoCl3 × 2H2O (abbreviately TrMA–CoCl3) crystals were investigated in the temperature region of 293–345 K. The anomalous behaviour of the investigated parameters at T1 = 327 K was related to early unknown phase transition. The considerable change of the absorption spectra at T1 is explained by the distorsion and the corresponding change of symmetry of the polyhedron around Co2+ ion. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Erratum: “On uniform (1 ≤ Ii ≤ 3) n‐fold {|IouterM(i1 … in) >} dual tensorial sets, spin irreps from SU(3 ≤ m) × Sn ⊃…⊃ Sn weight sets: A direct role for N(λ ⊢ n)‐partitional catalogs of Sn combinatorics in spin physics,”International Journal of Quantum ChemistryVolume 87, Number 4, 2002, pages 171–180
Authors: Temme F. P. 
Published: May 2004

AbstractThe original article to which this Erratum refers was published in International Journal of Quantum Chemistry (2002) 87(4) 171–180
A new algorithm to evaluate bielectronic integrals with 1s Slater‐type orbitals obtained by the integral transforms
Authors: Pérez J. E. , Cesco J. C. , Taurian O. E. , Ortiz F. S. , Rosso A. E. , Denner C. C. , Giubergia G. O. 
Published: May 2004

AbstractThis article presents a variation of the integral transform method to evaluate multicenter bielectronic integrals (12|34), with 1s Slater‐type orbitals. It is proved that it is possible to define, out of the expression of (12|34) given by the integral transform method, a function F(q) that has the property of having a unique Q, such that F(Q) = (12|34). Therefore, F(q) may be used to calculate (12|34). It is shown that the evaluation of F(Q) turns out to be simpler than the three‐dimensional integral involved in the calculation of (12|34), and an algorithm is presented to calculate Q. The results show that relative errors on the order of 10−3 or lower are obtained very efficiently. In addition, it is shown that the proposed algorithm is very stable. © 2004 Wiley Periodicals, Inc. Int J Quantum Chem, 2004
Incidence and characteristics of umbilical artery intermittent absent and/or reversed end‐diastolic flow in complicated and uncomplicated monochorionic twin pregnancies
Authors: Gratacós E. , Lewi L. , Carreras E. , Becker J. , Higueras T. , Deprest J. , Cabero L. 
Published: May 2004

AbstractObjectiveTo evaluate the incidence and clinical relevance of intermittent absent and/or reversed diastolic flow on umbilical artery Doppler in different groups of monochorionic twin pregnancies.MethodsThis was a prospective study involving three groups of monochorionic pregnancies: Group 1: controls followed fortnightly from the first trimester (n = 80); Group 2: cases with selective intrauterine growth restriction (n = 40); and Group 3: cases with severe twin–twin transfusion syndrome (n = 50). The presence and persistence over time of intermittent absent and/or reversed end‐diastolic flow on umbilical artery Doppler was recorded. Placentas were examined and placental sharing and the presence of large arterioarterial anastomoses (AAA) was assessed. Perinatal outcome was recorded in all cases.ResultsIntermittent absent and/or reversed diastolic flow was present in 5% (4/80) of cases in Group 1, 45% (18/40) in Group 2 and 2% (1/50) in Group 3 (P < 0.0001, Group 2 vs. 1 and 3). Placental examination was performed in 76.4% (130/170) of cases and sharing was 58% for Group 1, 81% for Group 2 and 73% for Group 3 (P < 0.0001, Groups 2 and 3 vs. 1). Large AAA were identified in all examined cases with intermittent flow (18/18) and in 3.6% (4/112) of those without. The in‐utero mortality rate was 0% in Group 1 and in Group 2 fetuses without intermittent flow. However, it was 19.4% in Group 2 cases with intermittent diastolic flow.ConclusionsIntermittent absent and/or reversed end‐diastolic flow may be considered to be a characteristic sign of monochorionic pregnancy, and seems to result from the existence of large AAA. Its incidence is significantly increased in the context of selective intrauterine growth restriction, indicating a high risk for poor pregnancy outcome in these cases. Copyright © 2004 ISUOG. Published by John Wiley & Sons, Ltd.
Fetal heart rate and umbilical artery flow velocity variability in intrauterine growth restriction: a matched controlled study
Authors: Vinkesteijn A. S. M. , Struijk P. C. , Ursem N. T. C. , Hop W. C. J. , Wladimiroff J. W. 
Published: May 2004

AbstractObjectivesTo study heart rate and umbilical artery blood flow velocity variability in growth‐restricted fetuses and investigate the influence of the autonomic nervous system on these parameters.MethodsDoppler velocity waveforms were collected from long‐lasting umbilical artery recordings in 15 fetuses with growth restriction and 15 normal age‐matched controls at 23–35 weeks of gestation. Absolute heart rate and umbilical artery blood flow velocity as well as the coefficient of variation were determined. Using power spectral analysis the low‐ and high‐frequency bands of heart rate variability and blood flow velocity variability were calculated. The low‐to‐high (LH) ratio of heart rate variability and blood flow velocity variability were examined as a measure of sympathovagal balance.ResultsIn growth‐restricted fetuses umbilical artery velocities were significantly reduced. Heart rate variability was significantly reduced in the presence of growth restriction, but no significant difference was demonstrated for blood flow velocity variability. The LH ratio for heart rate variability was significantly decreased in growth restriction, but no difference in LH ratio was demonstrated for blood flow velocity variability.ConclusionFlow velocity variability in growth restriction seems not to be predominantly influenced by the autonomic nervous system, whereas the decreased heart rate variability seems to be influenced by altered sympathetic–parasympathetic balance. Copyright © 2004 ISUOG. Published by John Wiley & Sons, Ltd.
Lost intrauterine devices during pregnancy: maternal and fetal outcome after ultrasound‐guided extraction. An analysis of 82 cases
Authors: Schiesser M. , Lapaire O. , Tercanli S. , Holzgreve W. 
Published: May 2004

AbstractObjectivesIt is generally agreed that intrauterine devices (IUDs) with visible strings in pregnancy should be removed because of the increased risk of miscarriage, septic complications and premature delivery. The precise management of pregnancies in association with so‐called ‘lost IUDs’, and especially the technique of their removal, has remained controversial. We present our experience of the management of intrauterine pregnancies with a lost IUD.MethodsUltrasound‐guided extraction of a lost IUD was performed in 82 intrauterine pregnancies. The subsequent outcome of the pregnancies is described.ResultsThere were no intra‐ or post‐procedure maternal complications. Although the miscarriage rate in the first 3 weeks after the procedure was higher than that in normal pregnancy, the complication rate approached that of normal pregnancy as the pregnancies progressed. The total miscarriage rate of 22% was comparable to that following extraction of IUDs with visible filaments. The rate of live births was 77.0%. Delivery before 37 weeks occurred in 13.5% of cases.ConclusionsUltrasound‐guided extraction is a minimally invasive and inexpensive procedure that is associated with few postoperative complications. It has a high success rate and is associated with a moderate miscarriage rate and no maternal complications. Copyright © 2004 ISUOG. Published by John Wiley & Sons, Ltd.
Ultrasound diagnosis of severe thrombotic placental damage in the second trimester: an observational study
Authors: Alkazaleh F. , Viero S. , Simchen M. , Walker M. , Smith G. , Laskin C. , Windrim R. , Kingdom J. 
Published: May 2004

AbstractObjectivesTo screen women with uteroplacental insufficiency between 18 and 26 weeks' gestation for sonographic evidence of destructive placental lesions, to observe the effect of low molecular‐weight heparin (LMWH) in these cases, and to compare the outcome with similar but untreated controls.MethodsWe screened 180 women at high risk for placental damage using 16‐week maternal serum screening (alpha‐fetoprotein and human chorionic gonadotropin), placental shape and texture, and uterine artery Doppler waveforms at the 18–20‐week level II examination. Serial gray‐scale examinations of placental texture were performed at 22, 24 and 26 weeks. LMWH was offered to women with ultrasound evidence of destructive placental lesions in the absence of intrauterine growth restriction and/or pre‐eclampsia.ResultsWe prospectively identified six women (3.3%) with abnormal maternal serum screening and uterine artery Doppler in whom abnormal placental texture (echogenic cystic lesions) suggestive of destructive lesions in the placental parenchyma was found either at the 18–20‐week ultrasound examination (n = 4), or by 26 weeks of gestation (n = 2). All six received LMWH and had live births (gestational age at delivery, 33–37 weeks; birth weight, 1000–3200 g). A further 14 women were referred with similar multiparameter evidence of placental damage at or after 26 weeks, outside the screening study. All had significant fetal growth restriction and were therefore not offered heparin. In 9/14 cases there was a perinatal death. Ischemic and/or thrombotic placental pathology was confirmed in each case, but no maternal thrombophilia disorders were identified in the 20 women.ConclusionsIntegrated biochemical and ultrasound testing of placental function at 16–20 weeks of gestation, followed by serial placental gray‐scale ultrasound, may be an effective method of identifying a subset of pregnancies at high risk of adverse pregnancy outcome due to destructive lesions in the placental parenchyma. This strategy of identifying thrombo‐occlusive placental lesions before the development of pregnancy complications may prove useful in the design of trials to study the effectiveness of LMWH in the prevention of clinical complications resulting from thrombo‐occlusive placental disease. Copyright © 2004 ISUOG. Published by John Wiley & Sons, Ltd.
Reduced antioxidant capacity in second‐trimester pregnancies with pathological uterine perfusion
Authors: Stepan H. , Heihoff‐Klose A. , Faber R. 
Published: May 2004

AbstractObjectivesTo examine whether pathological perfusion in the second trimester is characterized by an altered plasma antioxidant capacity and to investigate whether the total antioxidant capacity in maternal plasma is related to the clinical outcome of these high‐risk pregnancies.MethodsThis was a prospective cohort study that included 25 pregnancies with normal and 25 pregnancies with pathological uterine perfusion. Doppler ultrasound measurement of uterine perfusion was performed between 18 and 23 weeks of gestation. Total antioxidant capacity in maternal plasma was measured using a specific photometric assay.ResultsPlasma antioxidant capacity of pregnant women with pathological uterine perfusion (227.3 ± 4.0 µmol/L) was significantly lower compared with the group with normal uterine perfusion (275.2 ± 10.5 µmol/L; P < 0.05). There was a significant negative correlation between antioxidant capacity and mean pulsatility index of the uterine arteries (r = −0.363; P < 0.05). Patients with pathological perfusion and a normal course of pregnancy did not show significantly changed values compared with those patients with later pre‐eclampsia or intrauterine growth restriction (235.0 ± 4.9 µmol/L vs. 218.6 ± 6.7 µmol/L).ConclusionsSecond‐trimester pregnancies with pathological uterine perfusion are characterized by a decreased antioxidant capacity in maternal plasma. This reduction is related to the impaired uteroplacental blood flow, but does not reflect the changes characteristic of the oxidative status for diseases like pre‐eclampsia since the reduction of the plasma antioxidant capacity is not related to the clinical outcome of these high‐risk pregnancies. Copyright © 2004 ISUOG. Published by John Wiley & Sons, Ltd.
First‐trimester diagnosis of sacrococcygeal teratoma: the role of three‐dimensional ultrasound
Authors: Roman A. S. , Monteagudo A. , Timor‐Tritsch I. , Rebarber A. 
Published: May 2004

AbstractA fetus was suspected of having a sacrococcygeal teratoma (SCT) on routine nuchal translucency evaluation by sonography at 12+3 weeks. The patient was referred for three‐dimensional (3D) sonography to further delineate the extent of the mass. In this case, real‐time scanning of the mass in 3D mode assisted the diagnosis of the mass and patient counseling. We present what we believe to be the first case of SCT imaged in the first trimester using 3D ultrasound. Copyright © 2004 ISUOG. Published by John Wiley & Sons, Ltd.
Ultrasound prenatal diagnosis of a lateral facial cleft (Tessier number 7)
Authors: Presti F. , Celentano C. , Marcazzò L. , Dolcetta G. , Prefumo F. 
Published: May 2004

AbstractLateral facial clefting may occur as an isolated phenomenon or in association with other disorders. It may originate from a failed penetration of ectomesenchyme between the developing maxillary and mandibular prominences, but disruptive factors may also occur in a proportion of cases. The frequency of this abnormality is estimated as 1 in 50 000–175 000 live births. We describe a case of isolated symmetrical lateral facial cleft (number 7 according to the Tessier classification) diagnosed prenatally on ultrasound examination at 26 weeks of gestation. Copyright © 2004 ISUOG. Published by John Wiley & Sons, Ltd.