bluuebunny/crossref_metadata_2025_split huggingface dataset:
Water vapor absorption and permeability of films based on chitosan and sodium caseinate
Authors: Pereda Mariana , Aranguren Mirta I. , Marcovich Norma E. 
Published: December 2008

AbstractThe objective of this work was to characterize the moisture sorption and water vapor permeation behavior of edible films made from sodium caseinate and chitosan for future applications as protective layers on foods. Glycerol was used as a plasticizer, and the films were obtained by a casting/solvent‐evaporation method. The moisture sorption kinetics and water vapor permeability (WVP) were investigated. The effect of the addition of glycerol on the WVP characteristics of the films was determined at 25°C with a relative humidity (RH) gradient of 0–64.5% (internal to external). Experimental data were fitted with an exponential function with two fitting parameters. WVP increased with increasing glycerol content in both films, chitosan samples being much more permeable than caseinate ones at any glycerol content. WVPs of sodium caseinate, chitosan, and chitosan/caseinate films with 28 wt % glycerol were also determined for two RH gradients, 0 to 64.5% and 100 to 64.5%, higher WVPs being measured at higher RHs. The moisture sorption kinetics of caseinate films prepared with various glycerol contents were determined by the placement of the films in environments conditioned at 20°C and 75% RH. Peleg's equation and Fick's second law were used to predict the moisture sorption behavior over the entire time period. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
Synthesis of N‐β‐aminoethyl‐γ‐aminopropyl polydimethyl‐co‐polydiphenylsiloxane and its film morphology and orientation
Authors: Li Mingtao , An Qiufeng , Huang Liangxian , Yang Gang , Wang Qianjin 
Published: December 2008

AbstractA fabric softener, N‐β‐aminoethyl‐γ‐aminopropyl polydimethyl‐co‐polydiphenylsiloxane (PASO), was synthesized by the polymerization of octamethyl cyclotetrasiloxane with an amino‐functional silane and dimethyldiphenylsilane. The chemical structure of the synthesized polysiloxane was characterized by Fourier transform infrared and 1H‐NMR spectra. The morphology, composition, and hydrophobic properties of the PASO film were investigated by X‐ray photoelectron spectroscopy, atomic force microscopy, contact angle measurement, and other measurements. The experimental results indicate that on the silicon wafer surface, PASO formed a hydrophobic, nonhomogeneous structural film. In addition, the atomic force microscopy results show that the PASO film deposited on the silicon wafer seemed to be slightly rougher than the film of the control, the N‐β‐aminoethyl‐γ‐aminopropyl polydimethylsiloxane. As a result, an orientation model of PASO is proposed on the basis of the characterization of the PASO film properties. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
Comparison of Dentoalveolar Morphology in WT and P2X7R KO Mice for the Development of Biomechanical Orthodontic Models
Authors: Viecilli Rodrigo , Katona Thomas , Chen Jie , Roberts Eugene , Hartsfield James 
Published: December 2008

AbstractIt has been suggested that the absence of the P2X7 receptor affects long bone morphology, and that one of the cytokines dependent on its activation may also affect tooth morphology. P2X7R KO (knockout) were compared with C57B/6 WT mice (background strain) to identify differences in a maxillary molar and surrounding bone. Nineteen WT and 12 KO mouse maxillae were scanned and 3D‐reconstructed using microCT. Tooth dimensions were measured and 3D bone morphometry was conducted. A finite element model was constructed based on the results. No statistically significant differences were found in dentoalveolar characteristics between the two mouse types. A single finite element model of the tooth can be used to mechanically represent both strains. P2X7R does not have a major effect on alveolar bone or tooth morphology. The P2X7R effects are site‐specific. Anat Rec, 2009. © 2008 Wiley‐Liss, Inc.
Optimal designs for parameter estimation of the Ornstein–Uhlenbeck process
Authors: Zagoraiou Maroussa , Baldi Antognini Alessandro 
Published: December 2008

AbstractThis paper deals with optimal designs for Gaussian random fields with constant trend and exponential correlation structure, widely known as the Ornstein–Uhlenbeck process. Assuming the maximum likelihood approach, we study the optimal design problem for the estimation of the trend µ and the correlation parameter θ using a criterion based on the Fisher information matrix. For the problem of trend estimation, we give a new proof of the optimality of the equispaced design for any sample size (see Statist. Probab. Lett. 2008; 78:1388–1396). We also show that for the estimation of the correlation parameter, an optimal design does not exist. Furthermore, we show that the optimal strategy for µ conflicts with the one for θ, since the equispaced design is the worst solution for estimating the correlation. Hence, when the inferential purpose concerns both the unknown parameters we propose the geometric progression design, namely a flexible class of procedures that allow the experimenter to choose a suitable compromise regarding the estimation's precision of the two unknown parameters guaranteeing, at the same time, high efficiency for both. Copyright © 2008 John Wiley & Sons, Ltd.
Temporal aggregation of Markov‐switching financial return models
Authors: Chan Wai‐Sum , Zhang Li‐Xin , Cheung Siu Hung 
Published: December 2008

AbstractIn this paper we investigate the effects of temporal aggregation of a class of Markov‐switching models known as Markov‐switching normal (MSN) models. The growing popularity of the MSN processes in modelling financial returns can be attributed to their inherited flexibility characteristics, allowing for heteroscedasticity, asymmetry and excess kurtosis. The distributions of the process described by the basic MSN model and the model of the corresponding temporal aggregate data are derived. They belong to a general class of mixture normal distributions. The limiting behaviour of the aggregated MSN model, as the order of aggregation tends to infinity, is studied. We provide explicit formulae for the volatility, autocovariance, skewness and kurtosis of the aggregated processes. An application of measuring solvency risk with MSN models for horizons larger than 1 year and up to 10 years from the baseline U.S. S&P 500 stock market total return time series spanning about 50 years is given. Copyright © 2008 John Wiley & Sons, Ltd.
Vom Hofbräuhaus zum Deutschen Museum – Münchner Bauten aus Eisenbeton 1890 bis 1914 (2)
Authors: Schmidt Hartwig 
Published: December 2008

AbstractIn diesem Jahr (2008) feiert München sein 850‐jähriges Stadtjubiläum, und in den dazu erscheinenden Publikationen bemühen sich die Autoren, das speziell Münchnerische herauszuarbeiten. Wenig Beachtung findet dabei ein besonderes Kapitel der Münchner Baugeschichte – der Beginn des Bauens mit Eisenbeton um 1900. München kann für sich in Anspruch nehmen, diejenige Stadt gewesen zu sein, in der die neue Bautechnik erprobt wurde und schon früh bedeutende Bauten in Eisenbeton entstanden. Leider ist diese außergewöhnliche architektonische und bautechnische Entwicklung heute weitgehend in Vergessenheit geraten.
Plasma pharmacokinetics and tissue distribution of [6]‐gingerol in rats
Authors: Jiang Su‐zhen , Wang Ning‐sheng , Mi Sui‐qing 
Published: December 2008

Abstract[6]‐Gingerol is one of the pungent components in ginger which has been found to possess various pharmacological effects. However, there is insufficient information on the properties of [6]‐gingerol based on controlled pharmacokinetic studies. The aim of this study was to clarify distribution profiles of [6]‐gingerol in blood and biological tissues of experimental rats. Rats were administered a 240 mg/kg dose of Gs (a ginger extract, containing 53% [6]‐gingerol) by oral ingestion. Plasma samples were collected at 2.5, 5, 7.5, 10, 15, 20, 30, 45 min, and 1, 1.5, 2, 3, 4 h after dosing (eight samples per time point), and brain, heart, lung, spleen, liver, kidney, stomach and small intestine tissues were collected at 5, 15, 30 min and 1, 2, 4 h after dosing (five animals per time point). Samples were prepared by a liquid‐liquid extraction procedure and the extracts were assayed by HPLC‐UV. After per oral application, [6]‐gingerol was absorbed rapidly into the plasma, and the maximal concentration (4.23 µg/ml) was reached after 10 min post dosing. [6]‐Gingerol plasma concentrations declined with time in a biexponential pattern. The elimination half‐time at the terminal phase was 1.77 h and the apparent total body clearance was 40.8 l/h. When administered orally, [6]‐gingerol was well distributed to the tissues examined, with the highest concentrations found in the gastrointestinal tract. Maximal concentrations of [6]‐gingerol were reached in most tissues at 0.5 h post‐dosing. The concentrations of [6]‐gingerol in tissues all were higher than in plasma with corresponding tissue to plasma ratios greater than 1 after 0.25 h post‐dose, showing high tissue partitioning and extensive distribution. Copyright © 2008 John Wiley & Sons, Ltd.
X‐ray‐induced apoptosis of BEL‐7402 cell line enhanced by extremely low frequency electromagnetic field in vitro
Authors: Jian Wen , Wei Zhao , Zhiqiang Cheng , Zheng Fang 
Published: December 2008

AbstractThis study was designed to test whether extremely low frequency electromagnetic field (ELF‐EMF) could enhance the apoptosis‐induction effect of X‐ray radiotherapy on liver cancer cell line BEL‐7402 in vitro. EMF exposure was performed inside an energized solenoid coil. X‐ray irradiation was performed using a linear accelerator. Apoptosis rates of BEL‐7402 cells were analyzed using Annexin V‐Fit Apoptosis Detection kit. Apoptosis rates of EMF group and sham EMF group were compared when combined with X‐ray irradiation. Our results suggested that the apoptosis rate of BEL‐7402 cells exposed to low doses of X‐ray irradiation could be significantly increased by EMF. More EMF exposures obtain significantly higher apoptosis rates than fewer EMF exposures when combined with 2 Gy X‐ray irradiation. These findings suggested that ELF‐EMF could augment the cell apoptosis effects of low doses of X‐ray irradiation on BEL‐7402 cells in a synergistic and cumulative way. Bioelectromagnetics 30:163–165, 2009. © 2008 Wiley‐Liss, Inc.
Effects of 100 GHz radiation on alkaline phosphatase activity and antigen–antibody interaction
Authors: Homenko A. , Kapilevich B. , Kornstein R. , Firer M.A. 
Published: December 2008

AbstractEquipment that generates microwave radiation (MWR) spanning the frequency range of 300 MHz–100 GHz is becoming more common. While MWR lacks sufficient energy to break chemical bonds, the disagreement as to whether MWR exposure is detrimental to cellular dysfunction may be difficult to clarify using complex systems such as whole animals, cells, or cell extracts. Recently, the high frequency range of terahertz (THz) radiation has been explored and sources of radiation and its detectors have been developed. THz radiation is associated with the frequency interval from 100 GHz to 20 THz and constitutes the next frontier in imaging science and technology. In the present study, we investigated the effect of radiation in the low frequency THz range (100 GHz) on two defined molecular interactions. First, the interaction of soluble or immobilized calf alkaline phosphatase with the substrate p‐nitrophenylphosphate and second, the interaction between an antibody (mouse monoclonal anti‐DNP) and its antigen (DNP). Irradiation of enzyme either prior to addition of substrate or during the enzymatic reaction resulted in small but significant reductions in enzyme activity. These differences were not observed if the enzyme had previously been immobilized onto plastic microwells. Exposure of immobilized antigen to radiation did not influence the ability of the antigen to interact with antibody. However, irradiation appeared to decrease the stability of previously formed antigen–antibody complexes. Our data suggest that 100 GHz radiation can induce small but statistically significant alterations in the characteristics of these two types of biomolecular interactions. Bioelectromagnetics 30:167–175, 2009. © 2008 Wiley‐Liss, Inc.
Teaching students with ASD: Does teacher enthusiasm make a difference?
Authors: Natof Tammy Hammond , Romanczyk Raymond G. 
Published: December 2008

AbstractThere is a general belief that students perform better in an environment in which teachers exude enthusiasm. In elementary, secondary, and college settings, the display of teacher enthusiasm is associated with positive attitudes toward teachers, recall of information, and improved classroom behavior. Although the assumption that students perform better when teachers are enthusiastic is frequently extended to individuals diagnosed with autism spectrum disorder (ASD), there is currently no published research on the topic. Research on social avoidance suggests that individuals with ASD may have no reaction or even respond negatively to teacher enthusiasm and thus perform better in conditions of low teacher attention. The current study was conducted to examine the effects of teacher enthusiasm on task performance for 12 students diagnosed with ASD. For each participant, performance on a matching task was measured during a high attention condition and during a low attention condition. Inspection of performance data indicated that out of 12 participants, only one demonstrated better performance under high teacher attention and one demonstrated better performance under low teacher attention. Interestingly, when experimenters who served as teachers in the study were asked to judge student performance, they stated that all students performed better with high teacher attention. Based on the findings of the current study, educators and parents of children with ASD are cautioned against attributing differences or changes in student performance to type and intensity of social attention provided during task instruction in the absence of conducting a functional analysis. Implications from the current study serve as a reminder to avoid oversimplifying the complex learning challenges of children with autism and reiterate the importance of obtaining continuous objective performance data. Copyright © 2008 John Wiley & Sons, Ltd.
Neutral Nickel(II) and Copper(II) Tetraazamacrocyclic Complexes as Molecular Rods Attached to Gold Electrodes
Authors: Wawrzyniak Urszula E. , Woźny Mateusz , Kowalski Jarosław , Domagała Sławomir , Maicka Elwira , Bilewicz Renata , Woźniak Krzysztof , Korybut‐Daszkiewicz Bohdan 
Published: December 2008

AbstractNew dithiolated derivatives of neutral CuIIand NiIItetraazamacrocyclic complexes have been synthesized and characterized by spectroscopic and diffractional methods. These rod‐shaped molecules were assembled in monocomponent and mixed monolayers on gold electrodes. In the mixed monolayers, the active molecules were embedded in a hexanethiol matrix. The dithiolated complexes are oriented perpendicularly to the electrode, and reveal faster kinetics of electron transfer than those assembled in a single‐component monolayer. They appear as protrusions, which are easily addressed by using the STM method. In the presence of a suitable electron acceptor in the solution, the donor properties of the anchored Cu complex were weakened, which revealed donor–acceptor interactions with the monolayer. The peak position in the voltammogram indicates a stronger interaction of the solution‐based acceptor with the reduced CuIIform than with the CuIIIcomplex. This suggests the possibility of switching the association on or off by applying an appropriate potential.
Highly Productive CNN Pincer Ruthenium Catalysts for the Asymmetric Reduction of Alkyl Aryl Ketones
Authors: Baratta Walter , Chelucci Giorgio , Magnolia Santo , Siega Katia , Rigo Pierluigi 
Published: December 2008

AbstractChiral pincer ruthenium complexes of formula [RuCl(CNN)(Josiphos)] (2–7; Josiphos=1‐[1‐(dicyclohexylphosphano)ethyl]‐2‐(diarylphosphano)ferrocene) have been prepared by treating [RuCl2(PPh3)3] with (S,R)‐Josiphos diphosphanes and 1‐substituted‐1‐(6‐arylpyridin‐2‐yl)methanamines (HCNN; substituent=H (1 a), Me (1 b), and tBu (1 c)) with NEt3. By using 1 b and 1 c as a racemic mixture, complexes 4–7 were obtained through a diastereoselective synthesis promoted by acetic acid. These pincer complexes, which display correctly matched chiral PP and CNN ligands, are remarkably active catalysts for the asymmetric reduction of alkyl aryl ketones in basic alcohol media by both transfer hydrogenation (TH) and hydrogenation (HY), achieving enantioselectivities of up to 99 %. In 2‐propanol, the enantioselective TH of ketones was accomplished by using a catalyst loading as low as 0.002 mol % and afforded a turnover frequency (TOF) of 105–106 h−1 (60 and 82 °C). In methanol/ethanol mixtures, the CNN pincer complexes catalyzed the asymmetric HY of ketones with H2 (5 atm) at 0.01 mol % relative to the complex with a TOF of ≈104 h−1 at 40 °C.
ChemInform Abstract: Crystal Structures and Polymorphism in Compounds Bi6+xT1‐xP2O15+y T = First Row Transition Metals and Pb.
Authors: Arumugam Nachiappan , Lynch Vincent , Steinfink Hugo 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Hydrothermal Synthesis of Antimony Oxychloride and Oxide Nanocrystals: Sb4O5Cl2, Sb8O11Cl2, and Sb2O3.
Authors: Chen Xiang Ying , Huh Hyun Sue , Lee Soon W. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Alkynyl Halides in Ruthenium(II)‐Catalyzed [2 + 2] Cycloadditions of Bicyclic Alkenes.
Authors: Allen Anna , Villeneuve Karine , Cockburn Neil , Fatila Elisabeth , Riddell Nicole , Tam William 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Sterically Biased 3,3‐Sigmatropic Rearrangement of Chiral Allylic Azides: Application to the Total Syntheses of Alkaloids.
Authors: Lauzon Sophie , Tremblay Francois , Gagnon David , Godbout Cedrickx , Chabot Christine , Mercier‐Shanks Catherine , Perreault Stephane , DeSeve Helene , Spino Claude 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Direct Aromatization of Chlorohydroazulenones with Triflic Anhydride: Access to Chloroazulenyl Triflates.
Authors: Carret Sebastien , Depres Jean‐Pierre 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Phosphine‐Free Cp*Ru(Diamine) Catalysts in the Hydrogenation of Imines.
Authors: Cheruku Pradeep , Church Tamara L. , Andersson Pher G. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A General Synthesis of 2‐Alkoxy‐2‐phenylpropanoic Acids.
Authors: Monk Keith A. , Duncan Nathan C. , Bauch Eric A. , Garner Charles M. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Concise Synthesis of Spirocyclic, Bridged γ‐Butyrolactones via Stereospecific, Dyotropic Rearrangements of β‐Lactones Involving 1,2‐Acyl and δ‐Lactone Migrations.
Authors: Purohit Vikram C. , Matla Andrea S. , Romo Daniel 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Preparation of Pyridinyl Aryl Methanol Derivatives by Enantioselective Hydrogenation of Ketones Using Chiral Ru(diphosphine)(diamine) Complexes. Attribution of Their Absolute Configuration by 1H NMR Spectroscopy Using Mosher′s Reagent.
Authors: Maerten Eddy , Agbossou‐Niedercorn Francine , Castanet Yves , Mortreux Andre 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Potential Rho‐kinase Inhibitors Based on the Chemistry of an Original Heterocycle: 4,4‐Dimethyl‐3,4‐dihydro‐1H‐quinolin‐2‐one.
Authors: Letellier Marie‐Anne , Guillard Jerome , Caignard Daniel‐Henri , Ferry Gilles , Boutin Jean A. , Viaud‐Massuard Marie‐Claude 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Versatile Cyclodehydration Reaction for the Synthesis of Isoquinoline and β‐Carboline Derivatives.
Authors: Movassaghi Mohammad , Hill Matthew D. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New and Efficient Palladium(0)‐Mediated Microwave‐Assisted Direct C3 Alkenylation of Imidazo[1,2‐a]pyridines.
Authors: Koubachi Jamal , El Kazzouli Said , Berteina‐Raboin Sabine , Mouaddib Abderrahim , Guillaumet Gerald 
Published: December 2008

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