bluuebunny/crossref_metadata_2025_split huggingface dataset:
Maternal mental health and faltering growth in infants
Authors: Dunne Laura , Sneddon Helga , Iwaniec Dorota , Stewart Moira C. 
Published: October 2007

AbstractThis study reports on the first phase of a large‐scale, longitudinal, multidisciplinary community study examining the growth, learning and development of young children with a particular focus on failure to thrive without organic cause. However, the group identified in this study may be better described as weight faltering. This paper examines the psychological data collected using the Parenting Stress Index, Rosenberg Self‐Esteem and the General Health Questionnaire in relation to child growth. There were no significant differences between the mothers of the weight faltering and control children in terms of parenting stress, maternal depression, maternal perceptions of their parenting competence or maternal self‐esteem. Maternal sensitivity to comments about child size, regardless of direction, had a negative impact on mood. Copyright © 2007 John Wiley & Sons, Ltd.
Bayesian latent variable regression via Gibbs sampling: methodology and practical aspects
Authors: Chen Hongshu , Bakshi Bhavik R. , Goel Prem K. 
Published: October 2007

AbstractBayesian latent variable regression (BLVR) aims to utilize all available information for empirical modeling via a Bayesian framework. Such information includes prior knowledge about the underlying variables, model parameters and measurement error distributions. This paper improves upon the existing optimization‐based BLVR (BLVR‐OPT) method [1] by developing a sampling‐based Bayesian latent variable regression (BLVR‐S) method that relies on Gibbs sampling. Use of the sampling‐based framework not only provides point estimates, but its ability to generate samples that represent the posterior distribution of the unknown variables, also readily provides error bounds. Features and advantages of this method are demonstrated via examples based on simulated data and real Near‐Infrared (NIR) spectroscopy data. Practical aspects of Bayesian modeling such as determining when the extra computation may be worth the effort are addressed by an empirical study of the effects of the amount of training data and signal to noise ratio (SNR). The benefits of BLVR seem to be most significant when the number of measurements is limited and when noise in output variables is relatively large. Copyright © 2007 John Wiley & Sons, Ltd.
Inclusion Complexes for Use in Room‐Temperature Gas‐Sensor Design
Authors: Mi Liwei , Hou Hongwei , Xu Jiaqiang , Xu Hong , Song Zhiyong , Tang Mingsheng , Fan Yaoting 
Published: October 2007

AbstractThe inclusion complex [{Co(bpy)(H2O)4}·(fcds)]n (1), which has been constructed using the guest molecule ferrocene‐1,1′‐disulfonate (fcds), the bridging ligand 4,4′‐bipyridine (bpy) and d7 Co2+, contains an infinite zigzag chain formed by the central CoII ion and the bridging bpy ligand. Guest fcds molecules lie between two adjacent zigzag chains. The highly conjugated structure of complex 1 means that it can be used as a metal‐organic semiconductor, and it also shows a high response to liquefied petroleum gas (LPG) and ethanol/petroleum ether (EP) at room temperature. The inclusion complexes [{Co(bpp)2(H2O)2}·(fcds)·4H2O]n [2; bpp = 1,3‐bis(4‐pyridyl)propane] and [{Zn(bpy)(H2O)4}·(fcds)]n (3), on the other hand, cannot be employed as room‐temperature gas sensors because they are insulators. The electrical resistivity of inclusion complex [{Ni(bpy)(H2O)4}·(fcds)]n (4) is 621 MΩ, whereas that of [{Co(bpy)(H2O)4}SO4·(4‐abaH)2·3H2O]n (5) (4‐abaH = 4‐aminobenzoic acid) is only 137 MΩ. This means that the semi‐conducting properties of such inclusion complexes depend on both the conjugated structure and the central metal ions. Furthermore, conjugated inclusion complexes with an odd number of electrons could be useful for the design of highly selective room‐temperature gas sensors.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Tetranuclear Nickel(II) Complexes Composed of Pairs of Dinuclear LNi2 Fragments Linked by Acetylenedicarboxylate, Terephthalate, and Isophthalate Dianions: Synthesis, Structures and Magnetic Properties
Authors: Klingele Julia , Klingele Marco H. , Baars Oliver , Lozan Vasile , Buchholz Axel , Leibeling Guido , Plass Winfried , Meyer Franc , Kersting Berthold 
Published: October 2007

AbstractThe tetranuclear nickel(II) complexes [(LNiII2)2(acetylenedicarboxylate)][BPh4]2 (2[BPh4]2), [(LNiII2)2(terephthalate)][BPh4]2 (3[BPh4]2), and [(LNiII2)2(isophthalate)][BPh4]2(4[BPh4]2), where L2– represents a macrocyclic hexaaza‐dithiophenolate ligand, have been synthesized and characterised by UV/Vis spectroscopy, IR spectroscopy, X‐ray crystallography, and magnetic susceptibility measurements. Each dicarboxylate dianion acts as a quadridentate bridging ligand linking two bioctahedral LNi2 units via μ1,3‐bridging carboxylate functions to generate discrete [(LNiII2)2(dicarboxylate)]2+ dications with a central LNi2(O2C–R–CO2)Ni2L core. The structures differ mainly in the distance between the center of the Ni···Ni axes of the isostructural LNi2 units (8.841(1) Å in 2[BPh4]2, 10.712(1) in 3[BPh4]2, and 9.561(1) in 4[BPh4]2) and the tilting angle between the two Ni2O2 planes (86.3° in 2[BPh4]2, 58.2° in 3[BPh4]2, 20.9° in 4[BPh4]2). Magnetic susceptibility measurements on the complexes over the range 2.0–295 K reveal the presence of weak ferromagnetic exchange interactions between the NiII ions within the dinuclear subunits with values for the magnetic exchange constant J1 of 23.1(5), 18.1(5), and 14.2(5) cm–1 for 2[BPh4]2, 3[BPh4]2, and 4[BPh4]2, respectively (H = –2JS1S2). The magnitude of the exchange interaction J2 across the dicarboxylate bridges is in all cases less than 0.1 cm–1, suggesting that no significant interdimer exchange coupling occurs in 2[BPh4]2–4[BPh4]2. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Aggregation Phenomena of Long α‐ and α,ω‐Substituted Oligothiophenes – the Effect of Branched vs. Linear End‐Groups
Authors: Ellinger Stefan , Kreyes Andreas , Ziener Ulrich , Hoffmann‐Richter Carola , Landfester Katharina , Möller Martin 
Published: October 2007

AbstractFive homologous series of α‐ and α,ω‐substituted oligothiophenes up to an undecamer with branched and linear alkyl chains, respectively, are presented. These series are compared with respect to self‐organisation in solution and in solid state. UV/Vis absorption data for the long disubstituted branched oligothiophenes indicate the formation of aggregates in solution, expressed by a bathochromic shift of the absorption maximum and the appearance of shoulders. These changes in the spectra are obtained by variation of the solvent quality and/or the temperature. Contrary, the linear disubstituted oligothiophenes exhibit the formation of H‐aggregates in solution indicated by a hypsochromic shift in the UV/Vis spectra. Results from fluorescence spectroscopy support the existence of aggregates. No aggregation phenomena were found for the monoalkylated branched oligothiophenes. In contrast, H‐aggregation is found for the monoalkylated linear oligomers. This unexpected influence of the branching of the alkyl end groups on the aggregation behaviour in solution is discussed with the aid of mixed substituted oligothiophenes. Further information on shape and size of the aggregates present in solution is found by AFM measurements revealing that the linear substituents rather provoke the formation of anisotropic structures whereas the branched alkyl chains lead to spherical nanoobjects. Investigations of the thermal behaviour in solid state show that some of the oligomers exhibit thermotropic liquid crystalline phases. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
One‐Step Addition of Sulfonic Acids to Acetylene Derivatives: An Alternative and Stereoselective Approach to Vinyl Triflates and Fluorosulfonates
Authors: Vasilyev Aleksander V. , Walspurger Stéphane , Chassaing Stefan , Pale Patrick , Sommer Jean 
Published: October 2007

AbstractAcetylenic acids and esters as well as acetylenic ketones were efficiently and stereoselectively converted in one step to the corresponding vinyl triflates or fluorosulfonates in triflic or fluorosulfonic acids. Depending on the reaction conditions the E or the Z isomer can be obtained very conveniently in high isolated yields. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Decadal changes in distribution and frequency of wood in a free meandering river, the Ain River, France
Authors: Lassettre Neil S. , Piégay Hervé , Dufour Simon , Rollet Anne‐Julia 
Published: October 2007

AbstractThis study examined the temporal dynamics and longitudinal distribution of wood over a multi‐decadal timescale at the river reach scale (36 km) and a meander bend scale (300–600 m) in the Ain River, a large gravel‐bed river flowing through a forested corridor, and adjusting to regulation and floodplain land‐use change.At the 36 km scale, more wood was recruited by bank erosion in 1991–2000 than since the 1950s. The longitudinal distribution of accumulations was similar between 1989 and 1999, but in both years individual pieces occurred homogeneously throughout the reach, while jam distribution was localized, associated with large concave banks. A relationship between the mean number of pieces and the volume recruited by bank erosion (r2= 0·97) indicated a spatial relationship between areas of wood production and storage.Wood mass stored and produced and channel sinuosity increased from 1993 to 2004 at three meander bends. Sinuosity was related to wood mass recruited by bank erosion during the previous decade (r2= 0·73) and both of these parameters were correlated to the mean mass of wood/plot (r2= 0·98 and 0·69 respectively), appearing to control wood storage and delivery at the bend scale. This suggests a local origin of wood stored in channel, not input from upstream trapped by preferential sites.The increase in wood since 1950 is a response to floodplain afforestation, to a change from braided to meandering channel pattern in response to regulation, and to recent large floods. We observed temporal stability of supply and depositional sectors over a decade (on a reach scale). Meander bends were major storage sites, trapping wood with concave banks, also delivering wood. These results, and the link between sinuosity and wood frequency, establish geomorphology as a dominant wood storage and recruitment control in large gravel‐bed rivers. Copyright © 2007 John Wiley & Sons, Ltd.
Modelling volatility clustering in electricity price return series for forecasting value at risk
Authors: Karandikar R. G. , Deshpande N. R. , Khaparde S. A. , Kulkarni S. V. 
Published: October 2007

AbstractModelling of non‐stationary time series using regression methodology is challenging. The wavelet transforms can be used to model non‐stationary time series having volatility clustering. The traditional risk measure is variance and now a days Value at Risk (VaR) is widely used in finance. In competitive environment, the prices are volatile and price risk forecasting is necessary for the market participants. The forecasting period may be 1 week or higher depending upon the requirement. In this paper, a model is developed for volatility clustering in electricity price return series and its application for forecasting VaR is demonstrated. The first model is using GARCH (1, 1). The VaR of variance rate series, that is worst‐case volatility is calculated using variance method using wavelet transform. The model is used to forecast variance rate (volatility) for a sample case of 1‐week half‐hourly price return series. The second model developed is for forecasting VaR for price return series of 440 days. This model is developed using waveletsviamulti‐resolution analysis and uses regime‐switching technique. The historical data of daily average prices is obtained from 100% pool type New South Wales (NSW), a zonal market of National Electricity Market (NEM), Australia. Copyright © 2007 John Wiley & Sons, Ltd.
An upwind finite‐volume element scheme and its maximum‐principle‐preserving property for nonlinear convection–diffusion problem
Authors: Gao Fuzheng , Yuan Yirang , Yang Danping 
Published: October 2007

AbstractFor a class of nonlinear convection–diffusion equation in multiple space dimensions, a kind of upwind finite‐volume element (UFVE) scheme is put forward. Some techniques, such as calculus of variations, commutating operators and prior estimates, are adopted. It is proved that the UFVE scheme is unconditionally stable and satisfies maximum principle. Optimal‐order estimates in H1‐norm are derived to determine the error in the approximate solution. Numerical results are presented to observe the performance of the scheme. Copyright © 2007 John Wiley & Sons, Ltd.
Lack of correlation between synaptopodin expression and the ability to induce LTP in the rat dorsal and ventral hippocampus
Authors: Vlachos Andreas , Maggio Nicola , Segal Menahem 
Published: October 2007

AbstractSynaptopodin (SP), an actin binding protein associated with the spine apparatus, has been proposed to affect the ability of neurons to undergo synaptic plasticity. In the present study, we compared the density of SP puncta in stratum radiatum of the dorsal hippocampus (DH) with that of the ventral hippocampus (VH), a region that expresses only small and short lived LTP. Surprisingly, the VH contains significantly higher density of SP puncta than the DH. Following exposure to an acute stress, LTP was enhanced in the VH and suppressed in the DH. While SP density did change following stress, no similar trends were seen in the two sectors of the hippocampus. Thus, our results indicate a lack of clear interrelation between the density of SP and the ability to express LTP in the hippocampus. © 2007 Wiley‐Liss, Inc.
Removal of dentin matrix proteoglycans by trypsin digestion and its effect on dentin bonding
Authors: Bedran‐Russo Ana Karina B. , Pereira Patricia N. R. , Duarte Wagner R. , Okuyama Katsushi , Yamauchi Mitsuo 
Published: October 2007

AbstractThe aim of this study was to investigate the effect of trypsin digestion on removal of chondroitin sulfate proteoglycans (CS‐PGs) in demineralized dentin, and subsequent dentin bonding. Bovine dentin fragments were demineralized, treated with or without trypsin, stained with cupromeronic blue, and observed under transmission electron microscopy. Demineralized sections with or without trypsin digestion were also subjected to immunohistochemical analysis with anti‐chondroitin‐4‐sulfate (C4S) monoclonal antibody, 2‐B‐6. The presence of galactosamine and glucosamine in the trypsin digest was confirmed by amino acid analysis. Bond strength testing was performed on trypsin treated and control specimens where samples were either kept moist or dried and re‐wet, then bonded. Bond strength significantly decreased after trypsin treatment (p < 0.05). TEM, immunohistochemical, and amino acid analyses demonstrated that trypsin digestion efficiently removed C4S‐PGs from demineralized dentin matrix. This study indicates that the detrimental effects observed on dentin bonding by trypsinization may be due in part to the removal/cleavage of the C4S‐PGs, and further underscore the importance of C4S‐PGs on dentin bonding. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2008
Evaluation of the antimicrobial activity of ebselen: Role of the yeast plasma membrane H+‐ATPase
Authors: Chan Grace , Hardej Diane , Santoro Michelle , Lau‐Cam Cesar , Billack Blase 
Published: October 2007

AbstractEbselen (2‐phenyl‐1,2‐benzisoselenazol‐3(2H)‐one) is a selenium‐containing antioxidant demonstrating anti‐inflammatory and cytoprotective properties in mammalian cells and cytotoxicity in lower organisms. The mechanism underlying the antimicrobial activity of ebselen remains unclear. It has recently been proposed that, in lower organisms like yeast, the plasma membrane H+‐ATPase (Pma1p) could serve as a potential target for this synthetic organoselenium compound. Using yeast and bacteria, the present study found ebselen to inhibit microbial growth in a concentration‐ and time‐dependent manner, and yeast and Gram‐positive bacteria to be more sensitive to this action (IC50 ∼ 2–5 μM) than Gram‐negative bacteria (IC50 < 80 μM). Washout experiments and scanning electron microscopic analysis revealed ebselen to possess fungicidal activity. In addition, ebselen was found to inhibit medium acidification by PMA1‐proficient haploid yeast in a concentration‐dependent manner. Additional studies comparing PMA1 (+/−) and PMA1 (+/+) diploid yeast cells revealed the mutant to be more sensitive to treatment with ebselen than the wild type. Ebselen also inhibited the ATPase activity of Pma1p from S. cerevisae in a concentration‐dependent manner. The interaction of ebselen with the sulfhydryl‐containing compounds L‐cysteine and reduced glutathione resulted in the complete and partial prevention, respectively, of the inhibition of Pma1p ATPase activity by ebselen. Taken together, these results suggest that the fungicidal action of ebselen is due, at least in part, to interference with both the proton‐translocating function and the ATPase activity of the plasma membrane H+‐ATPase. © 2007 Wiley Periodicals, Inc. J Biochem Mol Toxicol 21:252–264, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/jbt.20189
Lead‐induced alterations of apoptosis and neurotrophic factor mRNA in the developing rat cortex, hippocampus, and cerebellum
Authors: Chao Shirley L. , Moss Jason M. , Harry G. Jean 
Published: October 2007

AbstractPrevious reports have recently shown the prototypic neurotoxicant, lead, to induce apoptosis in the brains of developing organisms. In the current study, timed‐pregnant rats were exposed to lead acetate (0.2% in the drinking water) 24 h following birth at postnatal day 1 (PND 1). Dams and pups were continuously exposed to lead through the drinking water of the dam until PND 20. Postnatal exposure in the pups resulted in altered mRNA levels of the following apoptotic and neurotrophic factors: caspase 2 and 3, bax, bcl‐x, brain‐derived neurotrophic factor (BDNF). Ribonuclease protection assays were conducted to measure the factors simultaneously at the following postnatal time points: 9, 12, 15, 20, 25, days. Our results suggest a brain region‐ and time‐specific response following lead acetate exposure. The region most vulnerable to alterations occurs in the hippocampus with alterations beginning at PND 12, in which caspase 3, bcl‐x, BDNF increase with lead exposure. Significant treatment effects were not observed for both the cortex and cerebellum. © 2007 Wiley Periodicals, Inc. J Biochem Mol Toxicol 21:265–272, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/jbt.20191
Deregulation of cofactor of BRCA1 expression in breast cancer cells
Authors: Sun Jianlong , Watkins Gareth , Blair Ashley L. , Moskaluk Christopher , Ghosh Sagar , Jiang Wen G. , Li Rong 
Published: October 2007

AbstractCofactor of BRCA1 (COBRA1) is an integral component of the human negative elongation factor (NELF), a four‐subunit protein complex that inhibits transcription elongation. Previous in vivo work indicates that COBRA1 and the rest of the NELF complex repress estrogen‐dependent transcription and the growth of breast cancer cells. In light of the COBRA1 function in breast cancer‐related gene expression, we sought to examine regulation of COBRA1 expression in both established breast cancer cell lines and breast carcinoma tissues. We found that COBRA1 expression was inversely correlated with breast cancer progression, as tumor samples of patients who had distant metastasis and local recurrence expressed very low levels of COBRA1 mRNA when compared to those who were disease free for over 10 years (P = 0.0065 and 0.0081, respectively). Using both breast and prostate cancer cell lines, we also explored the possible mechanisms by which COBRA1 expression is regulated. Our results indicate that the protein abundance of COBRA1 and the other NELF subunits are mutually influenced in a tightly coordinated fashion. Small interfering RNA (siRNA) that targeted at one NELF subunit dampened the protein levels of all four subunits. Conversely, ectopic expression of COBRA1 in the knockdown cells partially rescues the co‐depletion of the NELF subunits. In addition, our study suggests that a post‐transcriptional, proteasome‐independent mechanism is involved in the interdependent regulation of the NELF abundance. Furthermore, a lack of COBRA1 expression in breast carcinoma may serve as a useful indicator for poor prognosis. J. Cell. Biochem. 103: 1798–1807, 2008. © 2007 Wiley‐Liss, Inc.
Biodegradation kinetics of the soluble slowly biodegradable substrate in polyamide carpet finishing wastewater
Authors: Yildiz Günay , Insel Güçlü , Cokgor Emine Ubay , Orhon Derin 
Published: October 2007

AbstractBACKGROUND: Carpet manufacturing and finishing with purely synthetic fibers has received relatively little attention, compared to other textile processing types. This study evaluates the biodegradation kinetics of organic compounds generated from polyamide‐based carpet manufacturing.RESULTS: Experiments were conducted on pre‐washing and dyeing/softening wastewater effluents. Model evaluation of oxygen uptake rate profiles with dual hydrolysis kinetics revealed that the soluble slowly hydrolysable chemical oxygen demand (COD) was the major fraction, constituting nearly 97% of the biodegradable COD and 78% of total COD content. Degradation of the slowly hydrolysable COD fraction was characterized with a rate coefficient of 0.72 day−1, a significant rate limiting step for substrate utilization. Model simulation of system performance indicated that an unusually long hydraulic retention time was required for an activated sludge system to reduce the effluent COD concentration.CONCLUSION: Compared to domestic wastewater, two additional hydrolysable COD fractions with different degradation kinetics were characterized. The dyeing and softening step had the highest slowly biodegradable organic matter content, with the lowest degradation rate. Simulation results showed that soluble slowly hydrolysable COD degradation did not cause any problem in terms of effluent quality. With the system operated under reduced solids retention time, the effluent COD quality was significantly influenced by the slow hydrolysis rate of soluble hydrolysable matter. Copyright © 2007 Society of Chemical Industry