bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Proximal Imidazole Effect on Manganese(III)–Cyclam Complex
Authors: Kimura Eiichi , Shionoya Mitsuhiko , Yamauchi Tsuyoshi , Shiro Motoo 
Published: May 2006

Abstract
The synthesis, X-ray structure, and chemical properties are reported of a new 5 co-ordinate Mn(III) complex with imidazole-pendant cyclam, which has been found to be an efficient catalyst for alkene epoxidation.
La2O3-loaded SnO2 Element as a CO2 Gas Sensor
Authors: Yoshioka Tetsunori , Mizuno Noritaka , Iwamoto Masakazu 
Published: May 2006

Abstract
Among SnO2 elements modified by various metal oxides, La2O3-loaded SnO2 element was found to show promising sensing properties to CO2 in dry air at 673 K, rather high sensitivity and quick response. The sensitivity to CO2 depended on the operation temperature and the amounts of metal oxides loaded. A linear relationship between the sensitivity and the concentration of CO2 was observed for La2O3-loaded SnO2 element.
Intercalation of LiClO4 into the Organic Derivative of Layered Zirconium Phosphate
Authors: Yamanaka Shoji , Sarubo Masayoshi , Tadanobu Kazuo , Hattori Makoto 
Published: May 2006

Abstract
The interlayer surface of γ-zirconium phosphate was chemically modified by the reaction with ethylene oxide. The resulting layered organic derivative can be intercalated with LiClO4, forming solid solutions over a pretty wide range of the compositions. The ionic conductivities and the Raman spectra of the solid solutions have been studied.
Nitrosamines and Hydrazones of Dinitroformaldehyde from N,N-Disubstituted Hydrazines, a Dialkyl Nitroxide, and Tetranitromethane
Authors: Krishnan Ashwin M , Wolford Lionel T , Boyer Joseph H 
Published: May 2006

Abstract
N,N-Disubstituted hydrazines reacted with a mixture of a dialkylnitroxide and tetranitromethane to give nitrosamines and small amounts of hydrazones of dinitroformaldehyde.
Synthesis of Pyrazole Carboxylic Acid via Cobalt-Catalyzed Liquid Phase Oxidation
Authors: Tanaka Norio , Shinke Shuzo , Takigawa Shinichiro 
Published: May 2006

Abstract
In the presence of catalytic amount of cobalt acetate(II), manganese acetate(II) and bromide ion, the selective oxidation of 3,5-dichloro-1,4-dimethylpyrazole with molecular oxygen afforded 3,5-dichloro-1-methylpyrazole-4-carboxylic acid in more than 95% yield.
Regioselective Mono- and Di-C-acylation of Tungsten Diazoalkane Complexes via Alkenyldiazenido Complexes
Authors: Miyagi Hidekazu , Ishii Youichi , Aoshima Takayuki , Mizobe Yasushi , Hidai Masanobu 
Published: May 2006

Abstract
Tungsten alkenyldiazenido complexes reacted with isocyanates, isothiocyanate, and diphenylketene to give regioselectively α-acylated diazoalkane complexes after protonation. In the reaction of trans-[WF(NNCMe=CH2)(dpe)2] (dpe = Ph2PCH2CH2PPh2) with excess aryl isocyanates, α,α-diacylated diazoalkane complexes such as trans-[WF{NN=CMeCH(CONHPh)2}(dpe)2][BF4] were obtained, whose structure was determined by the X-ray analysis.
Preparation of Porous Supports in the SiO2–ZrO2–Na2O System
Authors: Tsurita Yasushi , Wada Keisuke 
Published: May 2006

Abstract
A new method of preparation of porous supports with SiO2–ZrO2–Na2O composition was investigated by heating the sol-gel derived SiO2 gel together with NaCl and ZrOCl2 at 760 °C. In the presence of ZrOCl2, crystallization of the SiO2 gel was suppressed and incorporation of Na2O into composition was identified. The microspherical porous supports, thus formed, possessed porous glass like texture and their pore size was about 500 Å in radius.
Novel Negative Solvatochromic Betaine Dyes, 5-(2,4,6-Triphenyl-N-pyridinio)tropolonates. Synthesis and Characterization
Authors: Takeshita Hitoshi , Mori Akira , Kato Nobuo , Wada Eiji , Kanemasa Shuji , Mori Akira , Fujimoto Etsuo , Nishiyama Nobuaki 
Published: May 2006

Abstract
5-(2,4,6-Triphenyl-N-pyridinio)tropolonates, troponoid betaine dyes, were prepared. These dyes were negatively solvatochromic and more blue-shifted than ET 30 in all of the solvents. The dihedral angle between the pyridinium and the tropolonate rings was larger than that of ET 30.
Versatile Dehydrogenative Aromatization of α,β-Unsaturated Cyclohexenones with VO(OEt)Cl2-Me3SiOTf
Authors: Hirao Toshikazu , Mori Makoto , Ohshiro Yoshiki 
Published: May 2006

Abstract
An oxovanadium compound obtained from VO(OEt)Cl2 and AgOTf or MesSiOTf efficiently induced dehydrogenative aromatization of α,β-unsaturated cyclohexenones to give aryl ethyl ethers in good yields.
Stereoselectivity in the Polarographic Reduction of Chromium(III) Complexes with L-α-Amino Acids
Authors: Oki Hisaya , Gessoh Hideya , Nakata Ryuji 
Published: May 2006

Abstract
Polarographic reduction behaviors of fac-[Cr(AA)3] complexes, where AA is an L-α-amino acidato ligand, have been studied in Me2SO. These complexes showed two reduction waves at mercury electrode and the first corresponded to Cr(III) → Cr(II). This reduction potential was found to be more positive for the (+)546-isomer than for the corresponding (−)546-isomer in the presence of Et4N+.
Radical Polyaddition of Dithiols to 1,4 -Bis(allenyloxy)xylylene. Synthesis of Functional Polymer Containing Reactive Carbon-Carbon Double Bonds in the Backbone
Authors: Yokozawa Tsutomu , Sato Eiichi , Endo Takeshi 
Published: May 2006

Abstract
Radical polyadditions of 1,4-benzenedithiol or bis(4-mercaptophenyl)sulfide to 1,4-bis(allenyloxy)xylylene were described. Thiol groups added to the terminal double bonds of allenyloxy groups selectively to give polymers containing both reactive carbon-carbon double bonds in the main chain and methyl groups in the side chain. The obtained polymers easily underwent crosslinking by the reaction of the double bonds in the backbone with Lewis acid.
The Synthesis of a New Ring System, Germatrisilacyclobutane [R2Si]3GeR′2 and Its Molecular Structure
Authors: Suzuki Hideo , Fukuda Yoko , Sato Norikazu , Ohmori Hideki , Goto Midori , Watanabe Hamao 
Published: May 2006

Abstract
A new type of ring system, the first germatrisilacyclobutane [R2Si]3GeR′2 (R = iPr, tBuCH2; R′ = Me3SiCH2) was synthesized and characterized. The X-ray structure analysis revealed that the both Si3Ge rings are nonplanar, and that the Si–Si and Si–Ge bond distances are considerably longer than those of the corresponding normal ones, respectively. The ring strain energy was estimated to be ca. 25 kcal/mol.
Preparation of Ruthenium(II) Complex-Containing Polymer Monolayers and Langmuir–Blodgett Films
Authors: Miyashita Tokuji , Saito Hidenao , Matsuda Minoru 
Published: May 2006

Abstract
The copolymers of [Ru(bpy)2(Vbpy)]2+ and N-dodecylacrylamide (DDA) form a stable condensed monolayer on a water surface and the monolayers could be transferred onto solid supports, yielding the Y-typed (bilayer type) ruthenium(II) complex-containing polymer Langmuir–Blodgett (LB) films.
Suppression of the Metal Instability and Continuous Change of the Carrier Density in (MeBr-DCNQI)2Cu1−xLix
Authors: Kobayashi Hayao , Miyamoto Akihito , Moriyama Hiroshi , Kato Reizo , Kobayashi Akiko 
Published: May 2006

Abstract
Electrical resistivities and IR spectra of new mixed cation (Cu/Li)-DCNQI systems were examined. (MeBr-DCNQI)2Cu1−xLix (0.25 &lt; x &lt; 0.5) remains in the metallic state down to 4 K. The stretching frequency of C=N(imine) of DCNQI shows a linear dependence on the charge of DCNQIf which is consistent with the mixed valency of Cu (Cu+1.3).
Cooperative Binding of Porphyrin by Anti-Porphyrin Antibodies
Authors: Harada Akira , Okamoto Kazutake , Kamachi Mikiharu 
Published: May 2006

Abstract
One of the monoclonal antibodies specific for MESO-tetrakis(4-carboxyphenyl)porphine (TCPP) causes a large shift of the Soret band of TCPP to a longer wavelength and large induced Cotton effects (ICD) on TCPP. Quantitative analyses of the binding of TCPP to the antibody by ICD show that not only one-to-one binding but two-to-one (binding site: TCPP) binding occurs in excess of the antibody over TCPP.
Photochemical Control of Ionic Conduction by Crowned Spirobenzopyran
Authors: Kimura Keiichi , Yamashita Takashi , Yokoyama Masaaki 
Published: May 2006

Abstract
Ionic conduction in composite films incorporating a crowned spirobenzopyran and LiClO4 was controlled photochemically. UV light irradiation, which promotes the isomerization of spirobenzopyran to its corresponding merocyanine form, depressed Li+ conduction due to its enhanced Li+ complexation, while visible light irradiation restored the initial ionic conduction.
Observation of Two 4-Coordinated Al Sites in Montmorillonite using High Magnetic Field Strength 27Al MQMAS NMR
Authors: Ohkubo Takahiro , Kanehashi Koji , Saito Koji , Ikeda Yasuhisa 
Published: May 2006

AbstractAnalyses of the layer structure of Na-montmorillonite have been performed using 27Al MAS and 27Al MQMAS NMR techniques. Results of 27Al MAS NMR measurements at higher magnetic field strength (16.4 T) suggest that the 4-coordinated Al site in Na-montmorillonite has two different structures. This was confirmed by the fact that two peaks corresponding to 4-coordinated Al are observed in the 27Al MQMAS NMR at high magnetic field strength. The ratio of two 4-coordinated Al sites was found to be affected by water in the interlayer space because the area ratio of cross peaks corresponding to two 4-coordinated Al sites changes with the water content.
Soil Mineralogy Evolution in the INRA 42 Plots Experiment (Versailles, France)
Authors: Pernes-Debuyser A. , Pernes M. , Velde B. , Tessier D. 
Published: May 2006

AbstractNatural soils change by long-term pedogenetic mechanisms, but tillage effects can also strongly affect the evolution of soils, mainly their physicochemical properties. The present paper describes the impact of fertilizers and amendments on soil mineralogy in experimental plots, without plant interaction.The soils of the 42 plots experiment at the INRA experimental station in Versailles (France) have been managed with fertilizers without plant growth since 1929. Strong changes in pH were observed and cation exchange capacities doubled between low and high pH (from 3.6 to 8.2). Strong acidification caused more evolution in the clay particle distribution without selective action on the clay composition.While the clay content varied only slightly, the organic matter content changed considerably, decreasing with non-organic treatment and increasing in the plot with manure treatment. The major clay minerals in the experimental plots are two disordered illite-smectite mixed-layer minerals, with minor amounts of illite/mica and kaolinite. Most treatments effected only minor changes in clay mineralogy. However the illite (non-expandable mineral) content increased in plots with K addition either as KCl treatment or in manure amendments by increasing the illite content and the illite (non-expandable layer) content of the I-S minerals. Manure changed the I-S mineral to a greater extent.
Behavior of Smectite in Strong Salt Brines under Conditions Relevant to the Disposal of Low- to Medium-Grade Nuclear Waste
Authors: Hofmann Heiko , Bauer Andreas , Warr Laurence N. 
Published: May 2006

AbstractTwo industrial bentonites, IBECO SEAL-80 and TIXOTON TE, have been proposed as potential backfill material in the German Asse salt dome, a test field for the disposal of low- to medium-grade active nuclear waste. Considering the unlikely but possible case of a barrier breakdown with infiltration of a highly concentrated salt brine, the physicochemical stability and material behavior of these bentonites in a saturated salt brine (predominantly MgCl2) at 25°C were studied over the time period of 150 days. The results show that no mineral transformations occurred throughout the duration of the experiments and minor dissolution was only active during the first days. Some chemical properties, namely sorption capability and swelling, were reduced during contact with the salt brine, but could be reversed by removing the salt after treatment. Despite restriction of the CEC in the presence of salt solution, interlayer cation exchange reactions are still active in this environment. The long-term chemical stability of smectite in salt brine is predicted under these low-temperature conditions, but the increased permeability during aggregate formation could lead to physical breakdown of the backfill component.
Mass Changes during Adsorption of Metal Bipyridyl Complexes by Clay Films Monitored with an Electrochemical Quartz Crystal Microbalance
Authors: Sun Laisheng , Villemure Gilles 
Published: May 2006

AbstractThe adsorption of [M(bpy)3]2+ ions (M = Ru or Os) by clay films immersed in pure water and in electrolyte solutions was investigated by electrochemical quartz crystal microbalance (EQCM), UV-visible spectroscopy and powder X-ray diffraction. In water, the adsorption of the cations resulted in a decrease in the mass of the films. This decrease in mass is attributed to the expulsion of some 50 water molecules from the clay interlayer spaces for each cation adsorbed. Water is lost to make room for the large metal complex cations in the interlayer spaces, and because of decreases in the volume of the interlayer spaces during adsorption of the cations. In 0.05 M NaCl or 0.05 M Na2SO4, UV-visible measurements show a rapid initial adsorption of the cations by ion exchange, followed by a slower additional adsorption of the cations above the clay’s CEC, presumably as ion pairs with the electrolyte counter ions. The EQCM show initial reductions in the mass of the films that were two to three times larger in pure water. These initial mass decreases were followed by smaller mass ‘re-increases’ at longer times that were not observed in water. The larger initial mass losses are attributed to the loss of more water from the clay interlayer spaces. In 0.5 M Na2SO4 or 1.0 M NaCl, adsorption of the cations never exceeded the clay’s CEC. The initial decreases in mass upon addition of the cations all but disappeared, leaving only the smaller positive mass changes at longer times.
Insight into the Binding of Divalent Cations to Sepia Eumelanin from IR Absorption Spectroscopy
Authors: Hong Lian , Simon John D. 
Published: May 2006

ABSTRACTIR absorption spectroscopy is used to examine the binding of the divalent cations Mg(II), Za(II), Zn(II) and Cu(II) to melanin granules isolated from the ink sacs of Sepia officinalis. The functional groups of the melanin granules interacting with the bound metal ions are deduced by examining the effect of metal concentration on transition frequencies associated with the COOH, NH and OH moieties of the pigment. The coordinating groups vary with metal ion and with concentration. For the experimental conditions used (initial solution pH of 4, ionic strength of 100 mM and a melanin concentration of 1 mg mL−1) Mg(II), Ca(II) and Zn(II) bind to carboxylate groups and Cu(II) binds predominantly to phenolic (catechol) groups However, at a concentration of 10 mM Cu(II) also shows evidence of binding to carboxylate and amine groups, reflecting a secondary binding site that becomes populated as the catechol sites are depleted.
Adverse pregnancy outcomes in offspring of fathers working in biomedical research laboratories
Authors: Magnusson Linda L. , Bodin Lennart , Wennborg Helena 
Published: May 2006

AbstractBackgroundLaboratory work may constitute a possible health hazard for workers as well as for their offspring, and involves a wide range of exposures, such as organic solvents, carcinogenic agents, ionizing radiation, and/or microbiological agents. Adverse pregnancy outcomes in the offspring of male employees in biomedical research laboratories are examined.MethodsOffspring to males employed 1970–1989 at four Swedish universities were identified via the Medical Birth Register (MBR), along with other pregnancy parameters. Offspring of fathers with laboratory work (n = 2,281) is considered exposed, and of non‐laboratory employees unexposed (n = 1,909). Exposure data were obtained by questionnaires to research group leaders. Logistic regression analysis estimated odds ratios (ORs) and 95% confidence intervals (CIs).ResultsPaternal laboratory work in general showed no statistically significant increased ORs concerning birth weight and/or gestational age, but work specifically with radioactive isotopes gave OR 1.8 (CI 1.0–3.2) for high birth weight and a relative risk of 1.2 (CI 1.0–1.4) for sex ratio (male/female).ConclusionsThere was no clear association between periconceptional paternal laboratory work and adverse reproductive outcomes, but use of radioactive isotopes showed increased OR for high birth weight in offspring. Am. J. Ind. Med. 49:468–473, 2006. © 2006 Wiley‐Liss, Inc.
A new case of Grange syndrome without cardiac findings
Authors: Wallerstein Robert , Augustyn Ann Marie , Wallerstein Donna , Elton Leslie , Tejeiro Beatriz , Johnson Valerie , Lieberman Kenneth 
Published: May 2006

AbstractGrange syndrome comprises arterial stenoses with hypertension, brachysyndactyly, bone fragility, learning disability, and cardiac defects. To date, we know of two reported families with five affected individuals. We report on one of the youngest cases, in a third family, a 3‐year‐old girl with brachysyndactyly, renal artery stenosis with hypertension, and bone fragility. She does not have apparent cardiac disease, suggesting cardiac anomalies may not be an obligatory finding in this syndrome. © 2006 Wiley‐Liss, Inc.
Metaphyseal dysplasia of Braun–Tinschert type: Report of a Japanese girl
Authors: Takata Shinjiro , Nishimura Gen , Ikegawa Shiro , Kuroda Yasuhiro , Nishino Mizuho , Matsui Yoshito , Yasui Natsuo 
Published: May 2006

AbstractWe report on a 7‐year‐old Japanese girl with metaphyseal dysplasia (MD) of Braun–Tinschert type, a recently recognized, autosomal dominant sclerosing bone dysplasia. All individuals with the disorder from four families in the literature originated from a small town in Bohemia or its vicinity. The occurrence of the disorder in a Japanese girl indicates that it is not restricted to Germans. The radiographic hallmarks of the disorder include metaphyseal undermodeling (Erlenmeyer‐flask deformity); osteosclerosis of the chondroosseous junctions, metaphyseal cortices, and epiphyseal margins; and exostosis‐like bone excrescences at the metaphyseal‐diaphyseal junctions. In the girl we described, the latter two findings were conspicuous at age 4 years, but became less prominent with increasing age. The metaphyseal trabeculae were somewhat coarse. The humeri exhibited varus deformity, and the ulnae and fibulae mild bowing. The mean bone mineral density of the lumbar spine was lower than that of age‐matched controls. The patient exhibited premature loss of primary teeth, likely to be a sign of increased periodontal bone resorption. Markers of bone formation and resorption were both increased, an indication of a high rate of bone turnover. © 2006 Wiley‐Liss, Inc.
Nablus mask‐like facial syndrome is caused by a microdeletion of 8q detected by array‐based comparative genomic hybridization
Authors: Shieh Joseph T.C. , Aradhya Swaroop , Novelli Antonio , Manning Melanie A. , Cherry Athena M. , Brumblay Janet , Salpietro Carmelo D. , Bernardini Laura , Dallapiccola Bruno , Hoyme H. Eugene 
Published: May 2006

AbstractIn 2000, Teebi reported on a 4‐year‐old boy with a distinctive pattern of malformation, which he termed the “Nablus mask‐like facial syndrome” (OMIM# 608156). Characterization of this syndrome has been difficult because of the paucity of patients described in the medical literature and its unknown etiology and pathogenesis. We present two patients with Nablus mask‐like facial syndrome who both display a microdeletion in the 8q21‐8q22 region detected by array‐based comparative genomic hybridization. Patient 1, a boy, has a distinct facial appearance characterized by severe blepharophimosis, tight‐appearing glistening facial skin, sparse and unruly hair, a flat and broad nose, and distinctive ears that are triangular in shape with prominent antihelices. He also demonstrates camptodactyly, contractures, unusual dentition, cryptorchidism, mild developmental delay, and a happy demeanor. Patient 2, a girl with a strikingly similar phenotype, was previously described in a report by Salpietro et al. 2003. She has distinctive ears, dental anomalies, and developmental delay. The etiology of her pattern of malformation was not identified at that time. Although high‐resolution chromosome and subtelomeric FISH analyses were normal, array‐based comparative genomic hybridization revealed an approximately 4 Mb deletion involving the 8q21.3‐8q22.1 region in both patients. This region encompasses a number of genes that may contribute to this unique phenotype. These results demonstrate a chromosomal microdeletion as the etiology of Nablus mask‐like facial syndrome and emphasize the diagnostic utility of array‐based comparative genomic hybridization in the evaluation of multiple malformation syndromes of previously unrecognized causation. © 2006 Wiley‐Liss, Inc.
Pattern of p63 mutations and their phenotypes—update
Authors: Rinne Tuula , Hamel Ben , Bokhoven Hans van , Brunner Han G. 
Published: May 2006

AbstractHeterozygous mutations in the transcription factor gene p63 cause at least six different syndromes with various combinations of ectodermal dysplasia, orofacial clefting and limb malformations. Here we will present an update of mutations in the p63 gene together with a comprehensive overview of the associated clinical features in 227 patients. These data confirm the previously recognized genotype–phenotype associations. Moreover, we report that there is a large degree of clinical variability in each of the p63‐associated disorders. This is illustrated by the different phenotypes that are seen for the five‐hotspot mutations that explain almost 90% of all EEC syndrome patients. © 2006 Wiley‐Liss, Inc.
Overgrowth with severe developmental delay following IVF/ICSI: A newly recognized syndrome?
Authors: Shah Prakesh S. , Weksberg Rosanna , Chitayat David 
Published: May 2006

AbstractWe report on a child with postnatal overgrowth, noted from 3 months of age, associated with severe developmental delay and refractory seizures. The patient was conceived using in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI). The patient's features do not resemble any reported overgrowth syndromes reported so far. We propose that this is a previously unrecognized disorder. The potential role of ICSI/IVF in the pathogenesis of this condition is unknown. No imprinting defect at chromosome 11p15 was identified. © 2006 Wiley‐Liss, Inc.
PHOX2B analysis in non‐syndromic neuroblastoma cases shows novel mutations and genotype–phenotype associations
Authors: McConville Carmel , Reid Sarah , Baskcomb Linda , Douglas Jenny , Rahman Nazneen 
Published: May 2006

AbstractNeuroblastoma (NB) is an embryonal tumor originating from neural crest cells and is one of the most common solid tumors of childhood. Recently, constitutional mutations in PHOX2B have been shown to confer an increased risk of NB. To date, mutations predisposing to neural crest tumors have been reported in 20 individuals from 16 families. These families included additional clinical features such as Hirschsprung (HSCR) disease or congenital central hypoventilation syndrome, either in the index case or relatives. The contribution of PHOX2B mutations to NB cases without additional features is unclear. To address this we sequenced PHOX2B in constitutional DNA from 86 individuals with non‐syndromic NB (4 cases had a family history of NB). We identified two mutations, 600delC, a frameshift mutation in an individual with isolated, unifocal NB and G197D, a missense mutation that was present in a family with multiple individuals with NB but no evidence of autonomic dysfunction. These data demonstrate that PHOX2B mutations are a rare cause of non‐syndromic NB. The mutations we identified are outside the domains typically mutated in PHOX2B syndromes. This provides further evidence that the underlying PHOX2B mutational mechanism influences tumor risk and suggests that the position of missense mutations may influence the resulting phenotype. © 2006 Wiley‐Liss, Inc.