bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Monte Carlo method for assessing color rendering quality with possible application to color rendering standards
Authors: Whitehead Lorne A. , Mossman Michele A. 
Published: November 2010

AbstractThe lighting industry has been increasingly challenged to reduce electrical energy consumption while providing illumination with sufficient color rendering quality. As a result, the problem of accurately assessing color rendering quality has gained increased prominence and the introduction of efficient narrow band light emitting diode (LED) sources has further intensified the debate. This study argues that there is a basic problem with the traditional method of quantifying color quality color rendering index (CRI), one that cannot be solved through minor improvements. The CRI relies on a determination of the degree of color distortion that a test source produces for a small number of test samples of specified spectral reflectance distribution, but there is no clear objective rationale for selecting these few samples. Also, any such arbitrary scoring scheme lacks an objective argument for what constitutes an acceptable score. This study proposes a new method for color rendering assessment that determines the color shift of one thousand, or more, representative reflection spectra that span the full multidimensional range of possible spectral distributions and colors. This broad sampling eliminates the intrinsic selection bias of the CRI calculation and its variants and it is compatible with a more objective standard for a color quality score, one that is statistically based on the fraction of the test spectra that experience color shifts that are less than a just noticeable difference (JND), or an agreed upon multiple of it. Since the concept of JNDs in color has been reproducibly quantified, it is hoped that this approach will be widely acceptable. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2012
Reversible Carrier‐Type Transitions in Gas‐Sensing Oxides and Nanostructures
Authors: Arulsamy Andrew D. , Eleršič Kristina , Modic Martina , Cvelbar Uroš , Mozetič Miran 
Published: November 2010

AbstractDespite many important applications of α‐Fe2O3 and Fe doped SnO2 in semiconductors, catalysis, sensors, clinical diagnosis and treatments, one fundamental issue that is crucial to these applications remains theoretically equivocal—the reversible carrier‐type transition between n‐ and p‐type conductivities during gas‐sensing operations. Herein, we present an unambiguous and rigorous theoretical analysis in order to explain why and how the oxygen vacancies affect the n‐type semiconductors α‐Fe2O3 and Fe‐doped SnO2, in which they are both electronically and chemically transformed into a p‐type semiconductor. Furthermore, this reversible transition also occurs on the oxide surfaces during gas‐sensing operation due to physisorbed gas molecules (without any chemical reaction). We make use of the ionization energy theory and its renormalized ionic displacement polarizability functional to reclassify, generalize and explain the concept of carrier‐type transition in solids, and during gas‐sensing operation. The origin of such a transition is associated with the change in ionic polarizability and the valence states of cations in the presence of oxygen vacancies and physisorped gas molecules.
Equilibrium coefficients of co‐crystallization of M2+ ions with MgSeO4·6H2O and their dependences on various physicochemical factors
Authors: Smolik M. , Kowalik A. 
Published: November 2010

AbstractEquilibrium co‐crystallization coefficients of low amounts of M2+ions (M2+ = {Ni2+, Cu2+, Co2+, Zn2+, Mn2+, Cd2+}) with MgSeO4·6H2O at 25 °C have been determined. Their values are comprised in the range: 0.058 (for Cd) < keq < 1.57 (for Co) and depend on some physicochemical and crystal chemical properties of both: co‐crystallizing salts (MSeO4·nH2O) and co‐crystallizing ions (M2+). These dependences are sometimes such strong, that they make it possible to derive simple formulae permitting estimation of keq coefficients at average error not exceeding 17%. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Synthesis and Characterization of Hierarchically Structured La2O2M@C:Eu3+ (M = S, Se) Microflowers by a Single‐Step RAPET Method
Authors: Kalai Selvan Ramakrishnan , Gedanken Aharon 
Published: November 2010

AbstractHierarchically structured La2O2M@C:Eu3+ (M = S, Se) microflowers have been successfully prepared by a facile one‐pot synthesis at a low temperature of 950 °C by the reaction under autogenic pressure at elevated temperature (RAPET) technique. The X‐ray diffraction patterns reveal the single‐phase formation of hexagonally structured La2O2M and La2O2M:Eu3+ (M = S, Se) microstructures. The optimization of reaction parameters, such as temperature and the molar concentrations of the precursors, for the preparation ofmonophasic La2O2M was evaluated by XRD measurements. Raman spectroscopy measurements allowed for the elucidation of the formation of La2O2M (M = S, Se) through examination of the active vibrational modes, and also proved the presence of carbon in the compounds. The field emission scanning electron microscopy (FESEM) and TEM images clearly show the micron‐sized rose‐like morphology, as well as the nanoflake‐like structure of the final products. The high resolution transmission electron microscopy (HRTEM) images reveal well‐defined lattice fringes indicating the highly crystalline nature of the products. The selected area electron diffraction (SAED) pattern indicates the single‐ and polycrystalline nature of the products. The optical properties of the materials have been studied by UV/Vis spectroscopy.
New Chlorido(dimethyl sulfoxide)iridium(III) Complexes with N6‐Substituted Adenines – Kinetic N(7) versus Thermodynamic N(9) Coordinated Adenine Isomers
Authors: García‐Raso Angel , Fiol Juan J. , Albertí Francisca M. , Lagos Yolanda , Torres Marta , Barceló‐Oliver Miquel , Prieto María J. , Moreno Virtudes , Mata Ignasi , Molins Elies , Estarellas Carolina , Frontera Antonio , Quiñonero David , Deyà Pere M. 
Published: November 2010

AbstractNew chlorido(dimethyl sulfoxide)iridium(III) complexes with N6‐substituted adenine derivatives: [IrIIICl4(DMSO‐κS){H‐AdeCx–κN(7)}]·nH2O [x = 3, n = 3 for 1; x = 4, n = 0.5 and 3 for 2a and 2b, respectively; x = 5, n = 0 for 3; x = 10, n = 0.33 for 4] and [IrIIICl4(DMSO‐κS){H‐AdeCx–κN(9)}] [x = 3 for 5; x = 4 for 6, x = 5 for 7; x = 10 for 8] have been synthesized and characterized by spectroscopic techniques and by single‐crystal X‐ray diffraction studies (1, 2b and 5). In all cases, iridium shows octahedral geometry and is coordinated to four chlorido ligands and one S atom from dimethyl sulfoxide (DMSO‐κS). The coordination sphere of the metal is completed by the N6‐substituted adenine molecule. Two different coordination modes are observed: (i) the ligand is protonated at N(1) and coordinated through N(7) (complexes 1–4); (ii) the adenine is protonated at N(3) and coordinated through N(9) (complexes 5–8). The kinetic/thermodynamic mechanisms that yield the different coordination products have been studied by using DFT calculations. Electrophoretic mobility studies and atomic force microscopy (AFM) investigation of the interaction between complexes 1, 5, 8 and plasmid pBR322 DNA have been performed.
Macrocyclisation of Macrodiolide with Dimethylaluminium Methaneselenolate
Authors: Shen Liu‐Lan , Mun Han‐Seo , Jeong Jin‐Hyun 
Published: November 2010

AbstractDimethylaluminium methaneselenolate (Me2AlSeMe, 1) acts as an acyl transfer agent for esterification. In cases of direct macrolactonisation (n = 10–12), this selenium–aluminium complex preferentially creates symmetric macrodiolides rather than macrolides. The factors determining macrodilactonisation were investigated and applied toward the total synthesis of norpyrenophorin, which result in a macrodilactonisation yield of 64 %.
The Absolute Configuration of Dibromopalau'amine
Authors: Reinscheid Uwe M. , Köck Matthias , Cychon Christine , Schmidts Volker , Thiele Christina M. , Griesinger Christian 
Published: November 2010

AbstractWe determined the ensemble of conformations and therelative configuration of dibromopalau'amine by using NMR parameters such as 3J couplings, ROEs and residual dipolar couplings. Based on the ensemble electronic circular dichroism (ECD) and optical rotatory dispersion (ORD) spectra were calculated using DFT and compared to experiment. By this method the absolute configuration of natural (–)‐dibromopalau'amine was determined as 6S,10R,11S,12S,16R,17S,18S,20S.
Metal removal efficiency and ecotoxicological assessment of field-scale passive treatment biochemical reactors
Authors: Butler Barbara A , Smith Mark E , Reisman David J , Lazorchak James M 
Published: November 2010

AbstractAnaerobic biochemical reactors (BCRs) are useful for removing metals from mining-impacted water at remote sites. Removal processes include sorption and precipitation of metal sulfides, carbonates, and hydroxides. A question of interest is whether BCRs remove aquatic toxicity. Influent and effluent samples from the Luttrell Repository and Peerless Jenny King, both in Montana, USA; Park City, Utah, USA; and Standard Mine, Colorado, USA, were examined and compared for removal of metals and aquatic toxicity. Effluent samples from Standard Mine included those having solely BCR treatment and those having BCR treatment followed by aeration in a polishing cell. Metal removal for all sites was &gt;90%. All influent samples were acutely toxic to Ceriodaphnia dubia and Pimephales promelas; toxicity was removed following treatment, except in the Luttrell Repository and Standard Mine BCR samples. Laboratory aeration of undiluted samples eliminated (Standard Mine BCR) or significantly reduced (Luttrell Repository, 65% survival) acute toxicity, most likely through removal of hydrogen sulfide. A toxicity identification evaluation suggested that metals also might be contributing to toxicity in the Luttrell Repository effluent samples; metals other than Mn were either not detected or very low (Fe and Pb) in the Standard Mine BCR samples. Field-aerated samples were not acutely toxic, and only the Luttrell Repository and Standard Mine samples showed short-term subchronic toxicity. Overall, results indicated BCR treatment had high metal removal efficiency and that inclusion of in-field aeration was beneficial in removal of acute and short-term subchronic toxicity. Environ. Toxicol. Chem. 2011;30:385–392. © 2010 SETAC
A randomized clinical trial of a writing workshop intervention to improve autobiographical memory and well‐being in older adults
Authors: de Medeiros Kate , Mosby Amanda , Hanley Kathryn B. , Pedraza Maria Suarez , Brandt Jason 
Published: November 2010

AbstractBackgroundDespite much research on methods to improve new learning and memory in old age, there is virtually no literature on the improvement of autobiographical memory (AM). The present study assessed the effectiveness of a structured autobiographical writing workshop for improving AM, mood and self‐concept in older adults.MethodsFifty‐one nondemented older adults (67–96 years) participated. AM was assessed with the Autobiographical Memory Interview (AMI) and the Remote Memory Word Association Task (RMWAT). After completing baseline (BL) testing, participants were randomized to a structured autobiographical writing workshop, a reminiscence group (active control condition) or a no‐treatment control group. Follow‐up testing was completed at 8 and 34 weeks after BL.ResultsRepeated measures ANOVAs failed to reveal a group‐by‐time interaction for any of the autobiographical memory (AM) measures. Across groups, there was a decrease in number of mid‐ and late‐life events reported (on the AMI), and memories tended to be less detailed (on the RMWAT) although more pleasant memories were reported with repeated testing. Mood remained unchanged; ratings of self‐concept improved across all groups.ConclusionsThis is the first study of its kind to use a randomized group design to test an intervention for AM in older adults. In general, our specific intervention was ineffective for increasing recall from one's life story, mood or self‐concept. Methodological limitations and suggestions for future investigation are discussed. Copyright © 2010 John Wiley & Sons, Ltd.
Altered functional adaptation to attention and working memory tasks with increasing complexity in relapsing‐remitting multiple sclerosis patients
Authors: Amann Michael , Dössegger Lea Sybil , Penner Iris‐Katharina , Hirsch Jochen Gunther , Raselli Carla , Calabrese Pasquale , Weier Katrin , Radü Ernst‐Wilhelm , Kappos Ludwig , Gass Achim 
Published: November 2010

AbstractAs attention, processing speed, and working memory seem to be fundamental for a broad range of cognitive performance, the present study on patients with mild forms of relapsing‐remitting multiple sclerosis (RR‐MS) focused on these domains. To explore subtle neuropsychological changes in either the clinical or fMRI domain, we applied a multistep experimental design with increasing task complexity to investigate global brain activity, functional adaptation, and behavioral responses to typical cognitive processes related to attention and working memory. Fifteen patients with RR‐MS (mean age 38 years, 22–49 years, 9 females, mean disease duration 5.9 years (SD = 3.6 years), mean Expanded Disability Status Scale score, 2.3 (SD = 1.3) but without reported cognitive impairment), and 15 age‐matched healthy controls (HC; mean age, 34 years, 23–50 years, 6 women) participated. After a comprehensive neuropsychological assessment, participants performed different fMRI experiments testing attention and working memory. In the neuropsychological assessment, patients showed only subtle reduction in learning and memory abilities. In the fMRI experiments, both groups activated the brain areas typically involved in attention and working memory. HC showed a linear in‐ or decrease in activation paralleling the changing task complexity. Patients showed stronger activation change at the level of the simple tasks and a subsequent saturation effect of (de‐)activation at the highest task load. These group/task interaction differences were found in the right parahippocampal cortex and in the middle and medial frontal regions. Our results indicate that, in MS, functional adaptation patterns can be found which precede clinical evidence of apparent cognitive decline. Hum Brain Mapp, 2010. © 2010 Wiley‐Liss, Inc.
Outcomes after the use of gastrostomy tubes in patients whose head and neck cancer was managed with radiation therapy
Authors: Ames Julie A. , Karnell Lucy Hynds , Gupta Anjali K. , Coleman Todd C. , Karnell Michael P. , Van Daele Douglas J. , Funk Gerry F. 
Published: November 2010

AbstractBackgroundThe purpose of this study was to examine the effect of continued oral intake and duration of gastrostomy tube placement on posttreatment nutritional outcomes in patients being irradiated for head and neck cancer.MethodsFactors associated with continued oral intake and its association with posttreatment outcomes were analyzed.ResultsPatients with no oral intake (39.6% of 91) were more likely to have laryngeal tumors, advanced disease, and pretreatment gastrostomy tube placement. Of the 55 patients whose gastrostomy tubes had been removed, those with continued oral intake and shorter gastrostomy tube placement were more likely to maintain their weight and report eating scores in the higher‐functioning category, but have more restricted diets. Observed survival was significantly better for the continued‐oral‐intake group (p = .001).ConclusionThe beneficial effects of continued oral intake and shorter gastrostomy tube placement on posttreatment outcomes shown in this study suggest that clinicians involved in these patients' care should emphasize oral intake during treatment. © 2010 Wiley Periodicals, Inc. Head Neck, 2011
Surgical site infection after preoperative neoadjuvant chemotherapy in patients with locally advanced oral squamous cell carcinoma
Authors: Liu Shih‐An , Wong Yong‐Kie , Wang Ching‐Ping , Wang Chen‐Chi , Jiang Rong‐San , Ho Hui‐Ching , Lin Jin‐Ching 
Published: November 2010

AbstractBackgroundWe investigated whether preoperative neoadjuvant chemotherapy is associated with increased surgical site infection (SSI) rate in patients with locally advanced oral cancer.MethodsIn this hospital‐based study, we retrospectively reviewed over 2000 chart records of patients with oral cavity cancer from March 1994 to December 2007. Those who received neoadjuvant chemotherapy were identified and matched for age, sex, tumor classification, primary site, and reconstruction methods to hospitalized patients who did not receive chemotherapy. Data were analyzed for the relationship between chemotherapy and SSI.ResultsA total of 306 patients were enrolled for final analyses. The overall postoperative SSI rate was 31.0%. The SSI rate in patients after neoadjuvant chemotherapy was similar to that in patients who did not receive the chemotherapy (33.3% vs 29.9%, p = .631).ConclusionsPreoperative neoadjuvant chemotherapy was not associated with increased SSI rate in patients with locally advanced oral cancer. © 2010 Wiley Periodicals, Inc. Head Neck, 2011
Prognostic factors for T1–T2 squamous cell carcinomas of the mobile tongue: A retrospective cohort study
Authors: Bonnardot Laurent , Bardet Etienne , Steichen Olivier , Cassagnau Elisabeth , Piot Benoit , Salam Alex P. , Campion Loïc , Ferron Christophe , Beauvillain de Montreuil Claude , Malard Olivier 
Published: November 2010

AbstractBackgroundThe aim of this study was to identify factors predicting poor prognosis at the time of early oral tongue carcinoma diagnosis.MethodsA retrospective cohort study was carried out on 70 patients with T1 or T2 squamous cell carcinoma of the mobile tongue treated with primary surgical treatment.ResultsIn all, 47% of patients received adjuvant treatment. Local recurrence was observed in 29% and regional recurrence in 26%. With a median follow‐up of 7.3 years for living patients, 5‐year actuarial overall, disease‐specific, and disease‐free survival rates were 48%, 61%, and 42%, respectively. The presence of poor histological differentiation increased the overall risk of death. Tumor thickness and posterior lingual location independently increased overall and disease‐specific risk of death. Concurrent or previous diagnosis of oral lichen significantly increased the risk of disease‐specific death and disease recurrence.ConclusionsThis study corroborates several known prognostic factors and indicates that diagnosis of oral lichen planus may be a risk factor for disease recurrence. © 2010 Wiley Periodicals, Inc. Head Neck, 2011
A Three‐Component One‐Pot Synthesis of Functionalized 5,5‐Dicyanocyclopenta‐1,3‐dienes from Arylidene­malononitriles, Activated Acetylenes, and KCN or KSCN
Authors: Yavari Issa , Sirouspour Mehdi , Souri Sanaz 
Published: November 2010

AbstractThe reaction of dialkyl acetylenedicarboxylates with arylidenemalononitriles in the presence of KSCN in MeCN led to a mixture of dialkyl (3E)‐4‐aryl‐3‐(arylideneamino)‐5,5‐dicyanocyclopenta‐1,3‐diene‐1,2‐dicarboxylates and dialkyl 4‐aryl‐5‐cyanothiophene‐2,3‐dicarboxylates. When these reactions were performed in the presence of KCN, only the functionalized 5,5‐dicyanocyclopenta‐1,3‐dienes were obtained.
Interleukin‐6 promotes tumorigenesis by altering DNA methylation in oral cancer cells
Authors: Gasche Jacqueline A. , Hoffmann Jürgen , Boland C. Richard , Goel Ajay 
Published: November 2010

AbstractWorldwide oral squamous cell carcinoma (OSCC) accounts for more than 100,000 deaths each year. Chronic inflammation constitutes one of the key risk factors for OSCC. Accumulating evidence suggests that aberrant DNA methylation may contribute to OSCC tumorigenesis. This study investigated whether chronic inflammation alters DNA methylation and expression of cancer‐associated genes in OSCC. We established an in vitro model of interleukin (IL)‐6 mediating chronic inflammation in OSCC cell lines. Thereafter, we measured the ability of IL‐6 to induce global hypomethylation of long interspersed nuclear element‐1 (LINE‐1) sequences, as well as CpG methylation changes using multiple methodologies including quantitative pyrosequencing, methylation‐specific multiplex ligation‐dependent probe amplification and sensitive melting analysis after real‐time—methylation‐specific polymerase chain reaction (PCR). Gene expression was investigated by quantitative reverse transcriptase‐PCR. IL‐6 induced significant global LINE‐1 hypomethylation (p = 0.016) in our in vitro model of inflammatory stress in OSCC cell lines. Simultaneously, IL‐6 induced CpG promoter methylation changes in several important putative tumor suppressor genes including CHFR, GATA5 and PAX6. Methylation changes correlated inversely with the changes in the expression of corresponding genes. Our results indicate that IL‐6‐induced inflammation promotes tumorigenesis in the oral cavity by altering global LINE‐1 hypomethylation. In addition, concurrent hypermethylation of multiple tumor suppressor genes by IL‐6 suggests that epigenetic gene silencing may be an important consequence of chronic inflammation in the oral cavity. These findings have clinical relevance, as both methylation and inflammation are suitable targets for developing novel preventive and therapeutic measures.
High Archaea diversity in Varvara hot spring, Bulgaria
Authors: Ivanova Iva , Atanassov Ivan , Lyutskanova Dimitrina , Stoilova‐Disheva Margarita , Dimitrova Desislava , Tomova Iva , Derekova Anna , Radeva Galina , Buchvarova Velina , Kambourova Margarita 
Published: November 2010

AbstractThe phylogeny of the latest recognized domain, Archaea, is still complicated and it is largely based on environmental sequences. A culture independent molecular phylogenetic analysis revealed high Archaea diversity in a terrestrial hot spring, village Varvara, Bulgaria. A total of 35 archaeal operational taxonomic units (OTUs) belonging to three of the classified five Archaea phyla were identified. Most of the sequences were affiliated with the phylum Crenarchaeota (23), grouped in four branches. The rest of the sequences showed highest similarity to the unidentified archaeal clones (9), Euryarchaeota (2), and “Korarchaeota ” (1). Eight (23%) of the sequenced 16S rDNAs didn't have known close relatives and represented new and diverse OTUs, four of them forming a new archaeal subgroup without close described sequences or culturable relatives. A sequence affiliated with “Korarchaeota ” showed low similarity (90%) to the closest neighbor and both sequences formed unique branch in this phylum. Consequently, the constructed archaeal libraries are characterized by (1) high proportion of OTUs representing uncultivated archaeal phylogroups, (2) the abundance of novel phylotype sequences, (3) the presence of high proportions of Crenarchaeota phylotypes unrelated to cultivated organisms and (4) the presence of a sequence only distantly related to “Korarchaeota ” phylum. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)