bluuebunny/crossref_metadata_2025_split huggingface dataset:
Complexation of C60 Fullerene with Cholesteryl Group-Bearing Pullulan in Aqueous Medium
Authors: Lai Douglas T , Neumann Markus A , Matsumoto Mutsuo , Sunamoto Junzo 
Published: May 2003

Abstract
Water-soluble complex between C60 fullerene and cholesteryl group-bearing pullulan (CHP) was prepared. C60 fullerene was dissolved in pyridine (10% v/v) in advance and then mixed with an aqueous CHP suspension (0.1 mg ml−1). The particle size of the formed complexes varied from 60 nm to 150 nm by the concentration of aqueous pyridine in final solution. The complex could retain its integrity for a long period of time without destruction upon heating or freezing.
Silica-Alumina-Supported Molybdena Catalyst for Propene Metathesis
Authors: Aritani Hirofumi , Fukuda Osamu , Yamamoto Takashi , Tanaka Tsunehiro , Imamura Seiichiro 
Published: May 2003

Abstract
Without reductive pretreatment, 10 wt% MoO3/SiO2-Al2O3 (JRC-SAH-1) exhibits high catalytic activity for propene metathesis. The Mo ions on SiO2-Al2O3 may exist as dispersed polyanions, and they can be reduced easily in contact with propene even at room temperature. The reduced Mo ions formed in the initial step of the reaction are efficient for metathesis.
CO2 Gas Sensing with the Combination of Trivalent Al3+ Ion Conducting Al2(WO4)3 Single Crystal Solid and Oxide Ion Conducting Stabilized Zirconia
Authors: Imanaka Nobuhito , Kamikawa Masayuki , Hiraiwa Masamichi , Tamura Shinji , Adachi Gin-ya 
Published: May 2003

Abstract
A carbon dioxide gas sensor was fabricated by using a trivalent Al3+ ion conducting Al2(WO4)3 single crystal solid with an oxide ion conducting stabilized zirconia and Li2CO3 as an auxiliary electrode. The sensor response was rapid and reproducible enough for a practical application. In addition, the sensor output was stable and the present sensor would be one of superior promising tool with a compact and maintenance-free type CO2 gas sensing.
A Benzene-Thermal Synthetic Route to Nanocrystalline ZrN
Authors: Hu Junqing , Lu Qingyi , Tang Kaibin , Deng Bin , Jiang Rongrong , Qian Yitai , Zhou Guien , Liu Xianming 
Published: May 2003

Abstract
Nanocrystalline ZrN has been successfully prepared via benzene-thermal reaction of ZrCl4 and NaN3 at 350-380 °C. X-ray powder diffraction patterns indicated that the crystallinity of ZrN was considerably high and the cell constant was a = 4.567 Å. Transmission electron microscopy images showed the powders consist of uniform spherical particles with a narrow particle-size distribution (10-20 nm). The role benzene-solvent played in the formation of nanocrystalline ZrN was discussed.
Non-Contact Measurement of Adsorbed Cytochrome c with Optical Waveguide Spectrometry; The Effect of Distance between Waveguide and Protein on the Spectral Sensitivity
Authors: Ohno Hiroyuki , Fukuda Kyoko , Kurusu Fumiyo 
Published: May 2003

Abstract
Optical waveguide spectrometry with non-contact conditions was performed with the aim of widening the choice of substrate material. The visible absorption spectrum of cytochrome c (cyt.c) adsorbed on a quartz glass or gold surface was detected with the evanescent wave from a co-faced waveguide. A clear correlation was observed between absorbance of cyt.c and the gap between the waveguide surface and the protein.
Difference of Electronic Structures between NaInO2 and NaInS2
Authors: Matsushima Shigenori , Kohiki Shigemi 
Published: May 2003

Abstract
The electronic structures of NaInO2 and NaInS2 are calculated by using the discrete variational X α method on model clusters. For NaInO2, it is found that the In-O bonding is not perfectly ionic but partially covalent because of the hybridization between O 2s, 2p and In 5s, 5p orbitals in the electron-occupied band. However, the overlapping of Na 3s, 3p orbitals with O 2s, 2p orbitals is very weak. On the other hand, Na 3s, 3p orbitals of NalnS2 relatively hybridize with S 3s, 3p orbitals, not only In 5s and 5p orbitals. These results show that the nature of the chemical properties of NaInS2 is more covalent, compared with NaInO2.
Colliding Spiral Waves Propagating on the Electrode
Authors: Nakabayashi Seiichiro , Inokuma Kiyoshi , Nakao Aiko , Krastev Ivan 
Published: May 2003

Abstract
Spiral waves consisted of deposited Ag and Sb were propagating two-dimensionally on a copper electrode surface while the electrochemical co-deposition of the metals was proceeding. A time course of this electrochemically driven wave-propagation was phenomenologically similar to the one driven by a homogeneous non-linear reaction in Belousov-Zhabotinsky (BZ) reaction-diffusion medium. The Ag/Sb co-deposition also formed a layered structure in the depth, finally it made a 3-dimensional super-structure on the electrode.
Synthesis and Properties of Alkylperoxocobalt(III) Porphyrin and Porphycene
Authors: Hayashi Takashi , Okazaki Kenshi , Shimakoshi Hisashi , Tani Fumito , Naruta Yoshinori , Hisaeda Yoshio 
Published: May 2003

Abstract
Alkylcobalt(III) and alkylperoxocobalt(III) species of porphyrin and porphycene have been prepared and characterized by UV-vis and 1H NMR spectroscopic measurements. Thermal decomposition of the alkylperoxocobalt species proceeds via Co–O or O–O bond cleavage, which depends on the coordination of an axial ligand.
New Ionic Conducting Polymer Composite Films Based on Partially Phosphorylated Poly(vinyl alcohol) and Poly(acrylic acid)
Authors: Suzuki Masahiro , Takada Naomi , Koyama Toshiki , Kobayashi Satoshi , Kimura Mutsumi , Hanabusa Kenji , Shirai Hirofusa , Miyata Seizo 
Published: May 2003

Abstract
Ionic conductivity of a composite film consisting of partially phosphorylated poly(vinyl alcohol) (P-PVA) and poly(acrylic acid) (PAA) is increased about three orders of magnitude over that of P-PVA film.
Photochromism of 2-Hydroxy-4′-methoxychalcone: A Novel Photon-Mode Erasable Optical Memory System with Nondestructive Readout Ability
Authors: Horiuchi Hiroaki , Shirase Hitoshi , Okutsu Tetsuo , Matsushima Ryoka , Hiratsuka Hiroshi 
Published: May 2003

Abstract
The photochromic system of 2-hydroxy-4′-methoxychalcone was found to be a novel photon-mode erasable system with nondestructive readout ability. The fatigue resistant property of the photochromic system of 2-hydroxy-4′-methoxychalcone has been confirmed at least up to 10 write-and-erase cycles.
Simple and Sensitive Detection Cell for Capillary Electrophoresis-Chemiluminescence Analysis Using Peroxyoxalate Reagent
Authors: Tsukagoshi Kazuhiko , Otsuka Miwa , Hashimoto Masahiko , Nakajima Riichiro , Kimoto Hideshi 
Published: May 2003

Abstract
Simple and convenient batch-type detection cells were developed for the capillary electrophoresis with chemiluminescence detection using peroxyoxalate reagent. A fused-silica capillary was directly inserted into the cell, and a grounding electrode was also done into it. The cell could be easily combined with capillary electrophoresis without any complex construction and expensive implements. A mixture of Dnsyl-amino acids was satisfactorily separated. Dnsyl-Trp was detected with the detection limit of 1 × 10−8 M by use of a glass cuvette-type cell.
Untersuchungen zum Einfluß von Polyethlenglykol und Methoxypolylethylenglykol auf die radikalische Lösungspolymerisation von Acrylnitril in Dimethylformamid
Authors: Fritzsche P. , Schneider A. 
Published: May 2003

AbstractDer Einfluß von Polyethylenglykol 400 und 2000 und von Methoxypolyethylenglykol 510 und 750 auf die radikalische Acrylnitrilpolymerisation in Dimethylformamid wurde dilatomerisch untersucht. Die übertragungskonstanten der Polyethylenglykole wurden sowohl unter Annahme von Disproportionierungsabbruch als auch für Abbruch durch Rekombination bestimmt.
Structure of the product of polymerization of 2,3‐epoxypropyl methacrylate in the presence of porous glass
Authors: Schneider B. , Doskočilová D. , Štokr J. , Tlusťáková M. , Kálal J. 
Published: May 2003

AbstractFrom 1H‐ and 13C‐NMR and Raman spectra it was found that by the presence of a large surface of glass, the epoxide group of 2,3‐epoxypropyl methacrylate (EPMA) is completely decomposed, yielding 2,3‐dihydroxypropyl methacrylate and a number of additional low‐molecular‐weight products with double bonds. Polymerization of EPMA in the presence of porous glass yields poly(2,3‐epoxypropyl methacrylate). Part of this polymer is firmly bound to the glass, probably by means of the decomposition product of EPMA.
Zum Einfluß von Umesterungs‐ und Polykondensationskatalysatoren auf das Kristallisationsverhalten von Polyethylenterephthalat
Authors: Weigel P. , Zimmermann H. 
Published: May 2003

AbstractDie Kinetik der isothermen Kristallisation von Polyethylenterephthalat aus dem Glaszustand wurde mittels Differentialkalorimetrie untersucht. Dabei konnte der Einfluß von Metallderivaten, wie sie zur Beschleungung der Umesterungs‐und Polykondensationsreaktion eingesetzt werden, auf das Kristallisationsverhalten nachgewiesen werden.
Ein geometrisches Modell für die Struktur hochorientierter, partiell‐kristalliner Polymere und dazugehöriges Modell für das Deformationsverhalten
Authors: Nitzsche K. , Vettegren V. I. 
Published: May 2003

AbstractBestimmend für das äußere Deformationsverhalten hochorientierter, fibrillarer Polymere ist das Deformationsverhalten eines fiktiven Strukturelements, das der Langperiode entspricht. Auf der Basis des geometrischen Modells für dieses Strukturelement und Kennwerten für das Deformationsverhalten der Makromoleküle verschiedener Konformation kann ein Modell für das Deformationsverhalten des polymeren Materials aufgestellt werden.
Zur dynamischen Modellierung des Reckprozesses von Polymerfäden. Teil 1: Entwicklung des mathematischen Modells
Authors: Beyreuther R. , Barthel R. , Nicht W. 
Published: May 2003

AbstractAbgeleitet von praxisorientierten Fragestellungen zum Reckprozeß von Polymerfäden wird die Modellentwicklung zur mathematischen Nachbildung des kontinuierlichen, dynamischen Reckprozesses beschrieben. Ausgehend von der allgemeinen Differentialgleichung eines Kelvin‐Elements wird ein auf den Reckprozeß zugeschnittenes verallgemeinertes Kelvin‐Modell entwickelt. Der daraus abgeleitete Rechenalgorithmus gestattet es, den kontinuierlichen Prozeß sowohl örtlich als auch zeitlich in eine beliebige Anzahl von Einzelementen bzw. ‐schritten aufzulösen und nachzubilden.
Infrarotspektroskopische Untersuchungen an gepolten Polyvinylidenfluorid‐Folien
Authors: Danz R. 
Published: May 2003

AbstractDie feldinduzierte Konformationsumwandlung und Dipol‐Orientierung in Polyvinylidenfluorid werden infrarotspektroskopisch quantitativ untersucht. Die Polung an beidseitig metallisierten, biaxial gereckten Polyvinylidenfluorid‐Folien bei 115°C mit 4,0 MV/cm führt zu einer nahezu vollständigen Konformationsumwandlung von der T‐G‐T‐G′‐ in die trans‐Konformation und zu einer remanenten Polarisation von mindestens 11 μC/cm2. Während die thermisch stimulierte Dipol‐Desorientierung oberhalb 60°C einsetzt, ist die feldinduzierte β‐Modifikation bis 175°C stabil.
Polymerization of some potential „grafting‐monomers”︁ for natural and synthetic fibres in cold plasma conditions
Authors: Simionescu C. I. , Dénes F. , Macoveanu M. M. , Totolin M. , Cazacu G. 
Published: May 2003

AbstractPlasma induced solid‐state polymerization of some potential „grafting‐monomers”︁ (acrylamide, benzidine and alphanaphthylamine) for natural and synthetic fibres has been studied. Polymerization mechanisms have been suggested on the basis of the analytical data (IR, NMR, ESR spectroscopy, elemental analysis, gel‐filtration, swelling properties, DTA measurements) of the polymers obtained in cold plasma conditions.
Elektronenmikroskopische und mikroanalytische Untersuchungen zur Veränderung der übermolekularen Struktur von mit Natriumhydroxid‐Lösungen und Schwefelsäure behandelter Cellulose
Authors: Purz H. J. , Vetter J. 
Published: May 2003

AbstractDurch elektronenmikroskopische Untersuchungen werden die Veränderung der übermolekularen Struktur der Cellulose bei der Einwirkung von NaOH und Schwefelsäure unterschieflicher Konzentration verfolgt und die Bedingungen ihrer Zerstörung ermittelt. Die Zerstörung der mikrofibrillaren Struktur durch NaOH‐Lösungen bzw. Schwefelsäure liegt bei den einzelnen Cellulosetypen in verschiedenen Konzentrationsbereichen. Die durch die Behandlung mit den Reagenzien gebildeten kristallinen Gebilde werden mittels Röntgenmikroanalyse auf ihre Elementzusammensetzung und mittels Elektronenbeugung auf ihre kristalline Struktur untersucht.
Reaktionsabhängige Teilchenvereinigung bei der Emulsionspolymerisation von Vinylchlorid
Authors: Goebel K.‐H. , Schneider H.‐J. , Jaeger W. , Reinisch G. 
Published: May 2003

AbstractBei der Emulsionspolymerisation von Vinylchlorid (Anfangsemulgatorkonzentration oberhalb der KMK) erfolgt insbesondere zu Beginn der Reaktion eine erhebliche Abnahme der Zahl der Latexteilchen. Die durch Latextitration und Ultrazentrifugation nachgewiesene Teilchenvereinigung ist nicht auf unzureichende Elektrolytstabilität der Partikel zurückführbar. Die Teilchenkonzentrationen bleiben konstant, wenn die Polymerisation durch Inhabitorzusatz oder Monomerverbrauch unterbrochen wird. Diese Befunde und Modellrechungen zur Kolloidstabilität auf Basis der DLVO‐Theorie weisen aus, daß Polymerisationsreaktion und Teilchenvereinigung in einem mechanistischen und kinetischen Zusammenhang stehen. Als mögliche Ursachen der Teilchenvereinigung werden erhöhte Emulgatordesorption von den polymerisierenden Teilchen sowie Brückenbildung zwischen Partikeln diskutiert.
Zur Struktur von p‐n‐Alkoxybenzoesäureestern im kristallin‐flüssigen Zustand
Authors: Tsukruk V. V. , Šilov V. V. , Lipatov Ju. S. , Konstantinov I. I. , Amerik Ju. B. 
Published: May 2003

AbstractAn einer Polymerreihe mit seitlichen Phenylbenzoatgruppen verschiedener Länge wurden eingehende röntgenographische Untersuchungen in einem weiten Temperaturbereich durchgeführt. Es konnte gezeigt werden, daß sehr lange flexible endständige Ketten ineinander eindringen. Eine Temperaturerhöhung führt zur Verbesserung der kristallin‐flüssigen Struktur bei Polymeren mit Methacrylat‐Hauptkette und zu einer gewissen Verschlechterung bei Polymeren mit Acrylat‐Hauptkette bei T > Tg.
Optimization of some compounds of polyvinylchloride with 2‐ethyl‐hexyl‐phthalate and an acrylic polymer
Authors: Adamescu Gh. , Petrovan S. , Rusu M. , Asandei N. 
Published: May 2003

AbstractThe influence of composition and processing parameters of polyvinylchloride‐acrylic polymer blends on the electrotechnical properties has been studied. Mathematical models were obtained, which can be used to predict the properties of the blends.
Absence of 12q21.2q22 deletions and subtelomeric rearrangements in cardiofaciocutaneous (CFC) syndrome patients
Authors: Kavamura M.I. , Zollino M. , Lecce R. , Murdolo M. , Brunoni D. , Alchorne M.M.A. , Opitz J.M. , Neri G. 
Published: May 2003

AbstractRecent publications described two patients with a CFC‐like phenotype and the same deletion of chromosome region 12q21.2q22 [Rauen et al., 2000, 2002]. The patients did not have the classical CFC phenotype and presented other signs not usually seen in CFC patients: the first patient had hydrocephalus, and the second, a history of olygohydramnios, normal stature, pyloric stenosis, cutaneous syndactyly of toes and bilateral transverse palmar creases. In order to verify if classic CFC patients with normal chromosomes in conventional preparations have microdeletions within the 12q21.2q22 chromosome region, we performed FISH analysis using 12 BAC probes to screen this area. The average interval between the probes was of approximately 1 Mb. No deletions were found in any of the 17 classical CFC patients we examined. We conclude that the region 12q21.2q22 is not a candidate region for CFC syndrome and that the patients described by Rauen et al. [2000, 2002] probably have a different condition, i.e., an aneuploidy syndrome, with some phenotypic resemblance to the CFC syndrome. To further evaluate the possibility of other chromosome imbalances, we performed a subtelomeric analysis, by FISH technique, of all chromosomes, and did not find any subtelomeric rearrangements. © 2003 Wiley‐Liss, Inc.
Association of microphthalmia and esophageal atresia: Description of a patient and review of the literature
Authors: Messina Mario , Ferrucci Elisabetta , Buonocore Giuseppe , Scarinci Renato , Garzi Alfredo 
Published: May 2003

AbstractSince 1988, when Rogers first described a boy with anophthalmia associated with esophageal atresia, eight similar cases have been reported. These patients lend support to the hypothesis that this association of congenital anomalies constitutes a discrete entity, although the etiology is still unknown.We report a patient with this combination of malformations as well as a marked hypoplasia of the entire left half of the body. © 2003 Wiley‐Liss, Inc.
Primary hypergonadotropic hypogonadism, partial alopecia, and müllerian hypoplasia: Report of a second family with additional findings
Authors: Mégarbané A. , Gannagé‐Yared M.H. , Khalifé A.A. , Fabre M. 
Published: May 2003

AbstractTwo sisters with primary hypergonadotropic hypogonadism associated with microcephaly, flat occiput, partial alopecia, absent or streak ovaries, and Müllerian hypoplasia are reported. Their parents are first cousins. Despite some clinical differences, their features were very close to a family described with such an association by Al‐Awadi et al. [1985: Am J Med Genet 22:619–622] in Kuwait. © 2003 Wiley‐Liss, Inc.
Synthesis and behavior in solution of the triple cubane‐ and windmill‐type framework isomers of an organorhodium tungsten oxide cluster [(Cp*Rh)4W4O16]
Authors: Nishikawa Koji , Kido Koichi , Yoshida Jun'ichi , Nishioka Takanori , Kinoshita Isamu , Breedlove Brian K. , Hayashi Yoshihito , Uehara Akira , Isobe Kiyoshi 
Published: May 2003

AbstractTwo geometrical isomers of a [(Cp*Rh)4W4O16] oxide cluster, a triple cubane‐type and a windmill‐type, are isolated selectively from the systems of [Cp*Rh]2+ and [WO4]2− in CH3CN using different reaction temperatures. Both isomers, which interconvert in certain solutions, are characterized by X‐ray diffraction. Copyright © 2003 John Wiley & Sons, Ltd.
Second neoplasms after megavoltage radiation for pediatric tumors
Authors: Gold Douglas G. , Neglia Joseph P. , Dusenbery Kathryn E. 
Published: May 2003

AbstractBACKGROUNDBecause ionizing radiation is a known carcinogen, diligent long‐term follow‐up in children exposed to therapeutic radiation is required. The authors updated an earlier study on the nature and risk of second neoplasms (SN) in patients treated with megavoltage radiotherapy as children.METHODSThe authors followed 446 children who were treated for a primary malignancy with megavoltage radiotherapy between January 16, 1954 and December 31, 1980. These children survived a minimum of 5 years. The nature and incidence of SNs were evaluated in this population. Patients with bilateral retinoblastoma or neurofibromatosis were excluded from the study due to their large genetically based predisposition for developing an SN.RESULTSThe Kaplan–Meier actuarial survival rate was 80% (95% confidence interval [CI] 74–85%) at 30 years for all patients. Thirty‐seven (8.3%) patients developed SNs, most of which occurred within the original radiation treatment field, 3.8–31.8 years (median, 15.5 years) after radiotherapy. The cumulative risk of developing an SN was 13% (95% CI 9–19%) at 30 years and the standardized incidence ratio for the development of any SN was 5.2 (95% CI 3.4–7.6%). The most common SNs were breast carcinoma (n = 8), skin carcinoma (five basal cell carcinomas, two malignant melanomas, and one dermatosarcoma), and meningiomas (n = 6). All eight breast carcinomas occurred after the treatment of childhood Hodgkin disease. Of the 37 patients with SNs, 12 died of either the SN (n = 10) or of recurrent disease (n = 2). Risk factors associated with developing a SN included initial diagnosis of Hodgkin disease (P = 0.0003), female gender (P = 0.008), and an initial diagnosis of acute lymphoblastic leukemia (P = 0.02).CONCLUSIONSPatients in the radiation‐treated cohort experienced increased mortality, were at an increased risk of developing an SN, and should undergo increased medical surveillance as adults. The cumulative probability of developing an SN has increased substantially at 30 years, largely due to an increase in follow‐up time. In addition, the cumulative probability curve does not show evidence of plateau after increased duration of follow‐up. Finally, the emergence of secondary breast carcinoma in the current study was not noted in the previous analysis. Cancer 2003;10:2588–96. © 2003 American Cancer Society.DOI 10.1002/cncr.11356
Rhabdomyosarcoma in infants younger than one year old
Authors: Ferrari Andrea , Casanova Michela , Bisogno Gianni , Zanetti Ilaria , Cecchetto Giovanni , Bernardi Bruno De , Riccardi Riccardo , Tamaro Paolo , Meazza Cristina , Alaggio Rita , Ninfo Vito , Carli Modesto 
Published: May 2003

AbstractBACKGROUNDThe management of rhabdomyosarcoma (RMS) in patients age < 1 year is particularly problematic and requires a tailored therapeutic approach. We report on the Italian Cooperative Group's 20‐year study of 50 children with RMS who were age < 1 year at diagnosis.METHODSPatients were treated using multimodality therapeutic approaches that were based on three consecutive protocols. Chemotherapy was administered to all patients, with dosages calculated according to body weight; calculated doses subsequently were reduced by 33–50%. Radiotherapy was administered to 10 patients.RESULTSWith a median follow‐up of 76 months, 5‐year event‐free survival and overall survival rates were 42.3% and 61.7%, respectively. Local recurrence was the major reason for treatment failure. In particular, the local recurrence rate was high in patients who warranted radiotherapy but received none due to their age. Completeness of surgery and nodal involvement were the most significant prognostic factors. After a suitable reduction in dosage was made, acute toxicity was no different from what has been observed in older children. The most relevant toxic event was cardiotoxic death in a newborn (n = 1).CONCLUSIONSThe current study confirmed that the outcome for infants with RMS is less satisfactory than for older children and that infants with RMS require more careful monitoring and specific treatment guidelines. The absence of local control is the major cause of treatment failure; aggressive conservative surgery should be encouraged, but more radiotherapy may be advisable in selected cases. Intensive chemotherapy is essential; a 33% dose reduction may ensure adequate tolerance. In addition, patients age < 3 months should not receive anthracyclines. Cancer 2003;10:2597–604. © 2003 American Cancer Society.DOI 10.1002/cncr.11357