bluuebunny/crossref_metadata_2025_split huggingface dataset:
Basis set dependence of solute–solvent interaction energy of benzene in water: A HF/DFT study
Authors: Bondesson Laban , Rudberg Elias , Luo Yi , Sałek Paweł 
Published: February 2008

AbstractSolute–solvent interaction energies for the benzene molecule dissolved in water are computed using Hartree‐Fock and B3LYP density functional theories. Explicit solvent molecules up to 14‐Å away from the dissolved benzene molecule are included in the calculation of interaction energies. Both basis set dependence and basis set superposition errors are carefully examined. It is found that the use of a larger basis set for the region near the solute together with a smaller basis set for the outer region gives results very close to what would have been obtained if the larger basis set had been used for the whole system. It is also shown that a correction for the basis set superposition error is a necessary component in this kind of calculations. With this correction, results obtained with different tested basis sets converge to within 1 kcal/mol. © 2008 Wiley Periodicals, Inc. J Comput Chem, 2008
Drying method and origin of standard affect condensed tannin (CT) concentrations in perennial herbaceous legumes using simplified butanol‐HCl CT analysis
Authors: Wolfe Richard M , Terrill Thomas H , Muir James P 
Published: February 2008

AbstractBACKGROUND: Several factors affect condensed tannin (CT) levels in plants and accuracy of the butanol‐HCl assay for total CT. Six native, perennial, herbaceous legumes from Texas were harvested at three stages of growth over a growing season; young vegetation, initial flowering, and late season. The samples were subjected to oven‐drying and freeze‐drying and analyzed for extractable (ECT), protein‐bound (PBCT), and fiber‐bound (FBCT) CT using a butanol‐HCl procedure, comparing several types of purified CT as standards.RESULTS: There was a wide range of CT concentration in the legumes, but little change in ECT and total (TCT) tannin concentrations over the growing season. Oven‐drying decreased (P < 0.05) ECT and increased (P < 0.05) PBCT and FBCT concentrations compared with freeze‐drying, but both methods ranked the forages similarly throughout the growing season relative to TCT. Quebracho tannin as a standard increased CT values for the forages compared with purified legume CT standards, but all standards ranked the forages similarly relative to tannin concentration. Modifications to the procedure increased speed and ease of using the CT analysis method.CONCLUSION: Quantitative CT values have limited value except to allow a relative ranking of forages. Selection of appropriate standards is important in providing realistic CT values. Improvements in the total (extractable + bound) CT analysis method will allow wider use of this procedure. Although ECT and TCT values changed little in native legumes over a growing season, biological activity and potential nutritional/medicinal benefits of CT in these plants needs further evaluation. Copyright © 2008 Society of Chemical Industry
Simultaneous determination of non‐volatile, semi‐volatile, and volatile organic acids in tobacco by SIM–Scan mode GC–MS
Authors: Wang Baoxing , Yang Shihua , Chen Guohui , Wu Yi , Hou Ying , Xu Guowang 
Published: February 2008

AbstractA method for simultaneous determination of seven nonvolatile organic acids (NVOAs), five semivolatile organic acids (SVOAs), and twelve volatile organic acids (VOAs) in tobacco by synchronous SIM (Selected Ion Monitoring)‐scan mode GC–MS was developed. The collection of NVOAs and SVOAs data was performed in full‐scan mode, and that of VOAs data was carried out with SIM. Recoveries of NVOAs and SVOAs varied from 90.0 to 103.0%, and RSDs were less than 4.0%; recoveries of VOAs ranged from 89.5 to 99.3%, and their RSDs were less than 3.0%. Twelve tobacco samples were analyzed by the described method, and the results show that the method is applicable for the simultaneous determination of VOAs, NVOAs, and SVOAs in tobacco.
The orthogonal character of stationary phases for gas chromatography
Authors: Poole Salwa K. , Poole Colin F. 
Published: February 2008

AbstractA database of system constants for 32 open‐tubular columns at 100°C is used to identify stationary phases for obtaining a wide selectivity space in comprehensive GC. Three parameters based on the Euclidean distance (D‐parameter) or vectors (d‐parameter and cosθ) in hyperspace are used to establish the chemical similarity and retention correlation as an inverse scale of selectivity differences. It is shown that the poly(methyloctylsiloxane) stationary phase is the best candidate for a low‐selectivity stationary phase and affords a wider selectivity space when combined with a selective polar stationary phase than poly(dimethylsiloxanes). The most suitable polar stationary phases are poly(ethylene glycols) or bis(cyanopropylsiloxane‐co‐silarylenes and to a lesser extent poly(methyltrifluoropropylsiloxanes). No systems are truly orthogonal but angles between individual stationary phase vectors of about 75° are possible by choosing the correct combination of stationary phases.
A process‐based classification of knowledge maps and application examples
Authors: Eppler Martin J. 
Published: February 2008

AbstractThis paper discusses pragmatic ways of classifying knowledge maps to give an overview of their application contexts and formats. In the paper, we show where and how the term knowledge map has been previously used and what criteria must be met in a sound and useful knowledge map classification that can support knowledge management processes. Various classification principles are presented and discussed. A table then matches map formats to knowledge management purposes and knowledge‐related contents in order to serve as a selection and organizing framework. Examples of some of the main types of knowledge maps are presented to illustrate the varieties of knowledge mapping present in the classification. The paper concludes by discussing its limitations and future research questions in the area of knowledge mapping. Copyright © 2008 John Wiley & Sons, Ltd.
Laser Direct Machining – Diversity is Key
Authors: Schulze Matthias , Venkat Sri 
Published: February 2008

AbstractLasers are now used to directly machine microstructures and surface patterns in a wide range of materials including plastics, metals and semiconductors. The laser is chosen because it often reduces the number of production steps, delivers superior results, or enables greener processes – making it an ideal tool for volume manufacturing in an increasingly environmentally sensitive world. This article examines just a few representative laser‐based processes and outlines the key laser characteristics for each.
The G389R mutation in the MAPT gene presenting as sporadic corticobasal syndrome
Authors: Rossi Giacomina , Marelli Cecilia , Farina Laura , Laurà Matilde , Maria Basile Anna , Ciano Claudia , Tagliavini Fabrizio , Pareyson Davide 
Published: February 2008

AbstractA few patients with mutations in the microtubule‐associated protein tau gene (MAPT), affected by frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP‐17T), may clinically present with a corticobasal syndrome (CBS). We report a case of apparently sporadic CBS bearing a mutation in the MAPT gene so far associated with frontotemporal dementia (FTD) phenotype. The patient is a 41‐year‐old man with progressive asymmetric signs of cortical and basal ganglia involvement consistent with CBS. Magnetic resonance imaging showed asymmetric cortical atrophy and unusual corticospinal tract hyperintensity in T2‐weighted images. Genetic testing revealed a heterozygous G to C mutation at the first base of codon 389 of the MAPT gene, changing glycine to arginine (G389R), in the patient and his unaffected elderly father. In conclusion, the MAPT G389R mutation shows phenotypic variability resulting in both FTD and CBS. The mutation also demonstrates incomplete penetrance. Corticospinal tract degeneration is an exceptional finding. © 2008 Movement Disorder Society
The mammalian target of rapamycin pathway and its role in molecular nutrition regulation
Authors: Lian Jun , Yan Xiang‐Hua , Peng Jian , Jiang Si‐Wen 
Published: February 2008

AbstractMammalian target of rapamycin (mTOR) is a protein serine‐threonine kinase that functions as a central element in signaling pathway involved in control of cell growth and proliferation. mTOR exists in at least two distinct multi‐protein complexes, mTORC1 and mTORC2. mTOR kinase controls the translation machinery, in response to nutrients and growth factors, via activation of p70 ribosomal S6 kinase and inhibition of eukaryotic initiation factor‐4E‐binding protein. In this report, we review the mTOR signaling pathway and its interaction with food intake, insulin resistance, lifespan and adipogenic regulation during the molecular nutrition regulation.
Magnetic microparticle aggregation for viscosity determination by MR
Authors: Hong Rui , Cima Michael J. , Weissleder Ralph , Josephson Lee 
Published: February 2008

AbstractMicron‐sized magnetic particles were induced to aggregate when placed in homogeneous magnetic fields, like those of MR imagers and relaxometers, and then spontaneously returned to their dispersed state when removed from the field. Associated with the aggregation and dispersion of the magnetic particles were time‐dependent increases and decreases in the spin–spin relaxation time (T2) of the water. Magnetic nanoparticles, with far smaller magnetic moments per particle, did not undergo magnetically induced aggregation and exhibited time‐independent values of T2. The rate of T2 change associated with magnetic microparticle aggregation was used to determine the viscosity of liquid samples, providing a method that can be of particular advantage for determining the viscosity of small volumes of potentially biohazardous samples of blood or blood plasma. Magn Reson Med 59:515–520, 2008. © 2008 Wiley‐Liss, Inc.
MR imaging of adventitial vasa vasorum in carotid atherosclerosis
Authors: Kerwin W.S. , Oikawa M. , Yuan C. , Jarvik G.P. , Hatsukami T.S. 
Published: February 2008

AbstractVasa vasorum in the adventitia of atherosclerotic arteries may play a role in plaque progression. In this investigation, a method for characterizing vasa vasorum in the carotid artery is proposed, in which the perfusion properties of the adventitia are probed via dynamic contrast‐enhanced (DCE) MRI. A parametric “vasa vasorum image” is automatically generated that depicts the plasma volume (vp) and transfer constant (Ktrans). The average Ktrans within the adventitia is proposed as a quantitative measurement related to the extent of the vasa vasorum. In 25 subjects with lesions meeting the requirements for carotid endarterectomy (CEA) significantly higher adventitial Ktrans of 0.155 ± 0.045 min–1 was observed, compared to 0.122 ± 0.029 min–1 in the remaining 20 subjects with moderate disease (P < 0.01). In the 25 subjects with endarterectomy specimens, histological evaluation showed that adventitial Ktrans was significantly correlated with the amount of neovasculature (R = 0.41; P = 0.04) and macrophages (R = 0.49; P = 0.01) in the excised plaque. In the remaining 20 subjects without histology, elevated adventitial Ktrans was significantly correlated with the log of C‐reactive protein (CRP) levels (R = 0.57; P = 0.01) and was elevated in active smokers compared to nonsmokers (0.141 ± 0.036 vs. 0.111 ± 0.017 min–1; P = 0.02). Because these factors are all associated with higher risk of atherosclerotic complications, these results suggest that adventitial Ktrans may be a marker of risk as well. Magn Reson Med 59:507–514, 2008. © 2008 Wiley‐Liss, Inc.
School refusal behavior associated with separation anxiety disorder: A cognitive‐behavioral approach to treatment
Authors: Doobay Alissa F. 
Published: February 2008

AbstractSchool refusal behavior can lead to disruptions in both educational attainment and social development. One of the common causes of school refusal behavior is separation anxiety disorder (SAD). Research suggests that children with SAD and school refusal behavior show an increased rate of psychiatric consultation and a decreased likelihood of becoming parents in adulthood, likely indicating limited social skills (Flakierska‐Praquin, Lindström, & Gillberg, 1997). This article provides a brief overview of the current literature on the association between SAD and school refusal behavior, as well as a proposed treatment for school refusal behavior associated with SAD based on cognitive‐behavioral theory. © 2008 Wiley Periodicals, Inc.
Spectrum and outcome of prenatally diagnosed fetal tumors
Authors: Kamil D. , Tepelmann J. , Berg C. , Heep A. , Axt‐Fliedner R. , Gembruch U. , Geipel A. 
Published: February 2008

AbstractObjectiveTo describe the spectrum of prenatally diagnosed fetal tumors, and the course and fetal outcome in affected pregnancies.MethodsThis was a retrospective study in two German tertiary referral centers of 84 fetuses with tumors diagnosed in the prenatal period. The tumors were classified according to their location and histology.ResultsThe most common site of origin was the heart (20/84, 23.8%), followed by the face and neck region (19/84, 22.6%) and the abdomen (16/84, 19%). Lymphangiomas (21/84, 25%) and rhabdomyomas (19/84, 22.6%) comprised half of the tumor histology. Less frequently, teratomas (14/84, 16.6%) and hemangiomas (12/84, 14.2%) were seen. Complications included arrhythmia in cases with rhabdomyoma (8/19, 42%) and signs of heart failure in cases with hemangioma (4/12, 33%) and teratoma (4/14, 28.6%). The overall survival rate was 75%. Cases with either a histological diagnosis of teratoma or tumor located in the brain had the worst prognosis.ConclusionThe combination of sonographic features and their location allows reliable prediction of the histological type in the vast majority of fetal tumors. Malignancy, associated malformations and aneuploidy are observed infrequently. Knowledge of the presence of a fetal tumor facilitates close surveillance by a specialized team, which might lead to early recognition of problems and improve perinatal outcome. Copyright © 2008 ISUOG. Published by John Wiley & Sons, Ltd.
Error‐resistant RFID‐assisted wireless sensor networks for cardiac telehealthcare
Authors: Hu Fei , Celentano Laura , Xiao Yang 
Published: February 2008

AbstractWireless transmission of a patient's electrocardiogram (ECG) signals can be used to reduce cardiac healthcare cost. However, wireless transmissions have high error rates due to radio interference. The ECG signal, where every second of data could mean abnormal patterns, cannot tolerate such losses. Due to this healthcare crisis, the ability for a device to remotely monitor a patient's medication intake and transmit accurate ECG readings, while being cost efficient, is a major innovation. In this research, we integrate a multi‐hop wireless sensor network (WSN) with radio frequency identification (RFID) readers. Our system has two distinct features: (1) remotely supervise patient medication intakeviaRFID technology, and (2) accurately and remotely transmitting a patient's ECG by adopting extended Kalman filter (EKF) for wireless error recovery. Copyright © 2008 John Wiley & Sons, Ltd.
Ultrastructural features of hepatocytes in cultured Eurasian perch (Perca fluviatilisL.) as affected by nutritional and husbandry conditions
Authors: Blanchard Gersande , Gardeur Jean N. , Mathis Nicolas , Brun-Bellut Jean , Kestemont Patrick 
Published: February 2008

A wide range of factors can be attributed to the syndrome of fatty liver observed in some cultured fish species. The objective of the study was therefore to quantify different hepatocyte ultrastructural features as potentially influenced by twelve nutritional and husbandry factors, in order to discriminate the most influent factors in Eurasian perch (Perca fluviatilis), a typical carnivorous temperate fish species. Twenty-four groups of juveniles (initial weight 57·6 (sd14·4) g) were intensively reared for 116 d and fed sixteen different isoproteic diets. The distribution of the experimental treatments was based on a multivariate fractional factorial design (L24212) with either high (+1) or low ( − 1) level of each of the following factors: diet (lipid and protein sources, lipid content, astaxanthin enrichment), feeding level, daily and weekly distribution frequency, fish density, initial weight heterogeneity, temperature, photoperiod, and light spectrum. Liver lipid droplets, glycogen, mitochondria and rough endoplasmic reticulum (RER) were semi-quantified and analysed by a soft imaging system using transmission electronic microscopy photographs. Important variability of hepatocyte ultrastructural features was observed. The present study confirms that the rearing temperature, through its influences in the general metabolic activity, seems to be the main factor modifying mainly lipid droplet accumulation and RER development. However, factors that could be pooled under the designation of factors leading to food accessibility and lipid and protein quality intensify or compensate the effect of temperature.
Small-amplitude analysis of a non-thermal variable charge dust soliton
Authors: TRIBECHE MOULOUD 
Published: February 2008

AbstractSmall-amplitude electrostatic solitary waves are investigated in an unmagnetized dusty plasma with hot variable charge non-thermal dust grains. These nonlinear localized structures are small-amplitude self-consistent solutions of the Vlasov equation in which the dust response is non-Maxwellian. Localized solitary structures that may possibly occur are discussed and the dependence of their characteristics on physical parameters is traced. Our investigation may be taken as a prerequisite for the understanding of the electrostatic solitary waves that may occur in space dusty plasmas.
Mediterranean‐type diet and risk of preterm birth among women in the Norwegian Mother and Child Cohort Study (MoBa): a prospective cohort study
Authors: HAUGEN MARGARETHA , MARGRETE MELTZER HELLE , LISE BRANTSÆTER ANNE , MIKKELSEN TINA , LOUISE ØSTERDAL MARIE , ALEXANDER JAN , OLSEN SJURDUR F. , BAKKETEIG LEIV 
Published: February 2008

AbstractBackground. Mediterranean diet has been shown to reduce the incidence of preterm birth. We wanted to investigate whether a Mediterranean‐type diet (MD) could be associated with a lower risk of preterm birth in the Norwegian Mother and Child Cohort Study (MoBa). Methods. The data collection was conducted as part of MoBa at the Norwegian Institute of Public Health. In MoBa, women answer a Food Frequency Questionnaire (FFQ) at week 18–22 of pregnancy. The MD criteria were intake of fish ≥2 times a week, fruit and vegetables ≥5 times a day, use of olive/canola oil, red meat intake ≤ times 2 a week, and ≤2 cups of coffee a day. Results. A total of 569 women (2.2%) met the MD criteria, 25,397 women (97.2%) met 1–4 criteria, and 159 women (0.01%) met none of the MD criteria. The number of preterm births in the MD group was 26 (4.6%), in those who met 1–4 criteria it was 1,148 (4.5%), and in those who met none of the criteria it was 10 (6.3%). The women who met the MD criteria did not have reduced risk of preterm birth compared with women meeting none of the MD criteria (OR: 0.73; 95% CI: 0.32, 1.68). Intake of fish twice or more a week was associated with a lower risk of preterm birth (OR: 0.84; 95% CI: 0.74, 0.95). Conclusions. The women who fulfilled the criteria of a MD did not have a reduced risk of preterm birth.
Oxidative Pentose Phosphate Pathway-Dependent Sugar Sensing as a Mechanism for Regulation of Root Ion Transporters by Photosynthesis
Authors: Lejay Laurence , Wirth Judith , Pervent Marjorie , Cross Joanna Marie-France , Tillard Pascal , Gojon Alain 
Published: February 2008

AbstractRoot ion transport systems are regulated by light and/or sugars, but the signaling mechanisms are unknown. We showed previously that induction of the NRT2.1 NO3 − transporter gene by sugars was dependent on carbon metabolism downstream hexokinase (HXK) in glycolysis. To gain further insights on this signaling pathway and to explore more systematically the mechanisms coordinating root nutrient uptake with photosynthesis, we studied the regulation of 19 light-/sugar-induced ion transporter genes. A combination of sugar, sugar analogs, light, and CO2 treatments provided evidence that these genes are not regulated by a common mechanism and unraveled at least four different signaling pathways involved: regulation by light per se, by HXK-dependent sugar sensing, and by sugar sensing upstream or downstream HXK, respectively. More specific investigation of sugar-sensing downstream HXK, using NRT2.1 and NRT1.1 NO3 − transporter genes as models, highlighted a correlation between expression of these genes and the concentration of glucose-6-P in the roots. Furthermore, the phosphogluconate dehydrogenase inhibitor 6-aminonicotinamide almost completely prevented induction of NRT2.1 and NRT1.1 by sucrose, indicating that glucose-6-P metabolization within the oxidative pentose phosphate pathway is required for generating the sugar signal. Out of the 19 genes investigated, most of those belonging to the NO3 −, NH4 +, and SO4 2− transporter families were regulated like NRT2.1 and NRT1.1. These data suggest that a yet-unidentified oxidative pentose phosphate pathway-dependent sugar-sensing pathway governs the regulation of root nitrogen and sulfur acquisition by the carbon status of the plant to coordinate the availability of these three elements for amino acid synthesis.
Global Transcript Levels Respond to Small Changes of the Carbon Status during Progressive Exhaustion of Carbohydrates in Arabidopsis Rosettes
Authors: Usadel Björn , Bläsing Oliver E. , Gibon Yves , Retzlaff Kristin , Höhne Melanie , Günther Manuela , Stitt Mark 
Published: February 2008

AbstractThe balance between the supply and utilization of carbon (C) changes continually. It has been proposed that plants respond in an acclimatory manner, modifying C utilization to minimize harmful periods of C depletion. This hypothesis predicts that signaling events are initiated by small changes in C status. We analyzed the global transcriptional response to a gradual depletion of C during the night and an extension of the night, where C becomes severely limiting from 4 h onward. The response was interpreted using published datasets for sugar, light, and circadian responses. Hundreds of C-responsive genes respond during the night and others very early in the extended night. Pathway analysis reveals that biosynthesis and cellular growth genes are repressed during the night and genes involved in catabolism are induced during the first hours of the extended night. The C response is amplified by an antagonistic interaction with the clock. Light signaling is attenuated during the 24-h light/dark cycle. A model was developed that uses the response of 22K genes during a circadian cycle and their responses to C and light to predict global transcriptional responses during diurnal cycles of wild-type and starchless pgm mutant plants and an extended night in wild-type plants. By identifying sets of genes that respond at different speeds and times during C depletion, our extended dataset and model aid the analysis of candidates for C signaling. This is illustrated for AKIN10 and four bZIP transcription factors, and sets of genes involved in trehalose signaling, protein turnover, and starch breakdown.