bluuebunny/crossref_metadata_2025_split huggingface dataset:
Different contrast information obtained from CARS and nonresonant FWM images
Authors: Akimov Denis , Chatzipapadopoulos Susana , Meyer Tobias , Tarcea Nicolae , Dietzek Benjamin , Schmitt Michael , Popp Jürgen 
Published: February 2009

AbstractWe demonstrate that coherent anti‐Stokes Raman scattering (CARS) microscopy can be used not to obtain vibrational contrast related to a particular chemical species only, but furthermore, it directly yields topological contrast. Topological contrast is due to the spatially dependent refractive index of the sample and a number of linear effects as interference, refraction and absorption contribute to the topological contrast inherent to CARS images. In order to distinguish between different contrast mechanisms we propose an image correction method based on the analysis of the nonresonant four‐wave mixing (FWM) signal distribution. Copyright © 2009 John Wiley & Sons, Ltd.
Analysis of marine biogenic sulfur compounds using Raman spectroscopy: dimethyl sulfide and methane sulfonic acid
Authors: Barletta Robert E. , Gros Brittney N. , Herring Michael P. 
Published: February 2009

AbstractBiogenic sulfur compounds, such as dimethyl sulfide (DMS), dimethyl sulfoniopropionate (DMSP), dimethyl sulfoxide (DMSO), and methane sulfonic acid (MSA), are important components of the global sulfur cycle and, as contributors to the formation of non‐anthropogenic aerosols, impact global climate. In general, these chemicals are found in the marine environment in extremely low concentrations (nM), but under certain circumstances, e.g. intracellular accumulations and inclusions in glacial ice, they can be found with concentration orders of higher magnitude (µM or greater). Current analytical methods, which are designed to measure concentrations in the nM range, do so by sacrificing detailed knowledge of the chemical environment and spatial distribution of these compounds. An alternative approach to the quantitative measurement of biogenic sulfur compounds directly (i.e. without pre‐processing) has been investigated in de‐ionized water and artificial seawater. The detection limits for the measurement of DMSO and MSA using Raman spectroscopy with both visible and UV excitation have been measured. For DMSO, a sensitivity of < 10 mM has been determined. For MSA, concentrations as low as 3 mM can be detected. It has been determined that, for aqueous solutions, the use of water as an internal standard for quantitative measurement appears to be adequate for measurement with high linearity over several decades of concentration. For DMSO and MSA, the measured sensitivities for quantitative Raman detection are adequate to address important issues in the biogeochemistry of these compounds. Moreover, for MSA it was determined that, based on measured band positions, previous studies of MSA in glacial ice have incorrectly attributed the species to solid salt rather than the, more likely, free ion in concentrated aqueous solution. In addition to sensitivity measurements, resonance/pre‐resonance enhancement of the Raman spectrum of DMSO and MSA, respectively, has been found with 248 nm excitation. Finally, the previously unreported Raman spectrum of Mg(MSA)2 has been measured. Copyright © 2009 John Wiley & Sons, Ltd.
Excited‐state structural dynamics and vibronic coupling of 1,3‐dithiole‐2‐thione—resonance Raman spectroscopy and density functional theory calculation study
Authors: Wang Huigang , Liu Bo , Wan Junmin , Xu Jun , Zheng Xuming 
Published: February 2009

Abstract1,3‐Dithiole‐2‐thione (DTT) was synthesized and characterized using NMR, FT‐Raman, FT‐IR, UV spectroscopies. Resonance Raman spectra (RRs) were obtained with 341.5, 354.7 and 368.9 nm excitation wavelengths and density functional calculations were done to elucidate the electronic transitions and the RRs of DTT in cyclohexane solution. The RRs indicate that the Franck‐Condon region photodynamics is predominantly along the CS stretch+ H‐CC‐H scissor υ4, accompanied by the H‐CC‐H scissor υ3, S‐C‐S symmetric stretch υ6, CC stretch υ2, and overtone of the non‐totally symmetric SC‐S2 out‐of‐plane deformation 2υ11. The excited‐state dynamics and the force constant of CS stretch calculated by the RRs were discussed. Copyright © 2009 John Wiley & Sons, Ltd.
Synthesis and vibrational analysis of N‐(2′‐Furyl)‐Imidazole
Authors: Ledesma A. E. , Zinczuk J. , Ben Altabef A. , López González J. J. , Brandán S. A. 
Published: February 2009

AbstractThe N‐(2′‐furyl)‐imidazole (1) has been prepared and characterized using infrared, Raman and multidimensional nuclear magnetic resonance spectroscopies. Theoretical calculations have been carried out by employing the Density Functional Theory (DFT) method, in order to optimize the geometry of their two conformers in the gas phase and to support the assignments of the vibrational bands of1to their normal modes. For a complete assignment of the compound, DFT calculations were combined with Scaled Quamtum Mecanic Force Field (SQMFF) methodology in order to fit the theoretical wavenumber values to the experimental one. Furthermore, Natural Bond Orbital (NBO) and topological properties by Atoms In Molecules (AIM) calculations were performed to analyze the nature and magnitude of the intramolecular interactions. The result reveals that two conformers are expected in liquid phase. Copyright © 2009 John Wiley & Sons, Ltd.
Theoretical and vibrational spectral investigation of sodium salt of acenocoumarol
Authors: Joe I. Hubert , Kostova Irena , Ravikumar C. , Amalanathan M. , Cîntǎ Pînzaru Simona 
Published: February 2009

AbstractThe FT‐IR and FT‐Raman spectra of sodium salt of 4‐hydroxy‐3[1‐(4‐nitrophenyl)‐3‐oxobutyl]‐2H‐1‐benzopyran‐2‐one (acenocoumarol sodium salt) in solid phase have been recorded and analyzed. The optimization geometry, intramolecular hydrogen bonding, and harmonic vibrational wavenumbers of acenocoumarol sodium salt have been investigated with the help of B3LYP density functional theory (DFT) methods. The infrared and Raman spectra were predicted theoretically from the calculated intensities. Natural bond orbital (NBO) analysis indicates the presence of CH···O hydrogen bonding in the molecule. The first static hyperpolarizability of the molecule has been computed. Copyright © 2009 John Wiley & Sons, Ltd.
Lymph node assessment in cervical cancer: Prognostic and therapeutic implications
Authors: Gien L.T. , Covens A. 
Published: February 2009

AbstractLymph node status is not part of the staging system for cervical cancer, but provides important information for prognosis and treatment. This article reviews the incidence and patterns of lymph node metastasis, and the issues surrounding surgical assessment of lymph nodes. The preoperative assessment of lymph nodes by imaging, as well as the intraoperative assessment by sentinel nodes will be discussed. Finally, the prognostic and therapeutic implications of lymphadenectomy in cervical cancer will be reviewed. J. Surg. Oncol. 2009;99:242–247. © 2008 Wiley‐Liss, Inc.
Lymph node assessment and lymphadenectomy in bladder cancer
Authors: Sharir Sharon , Fleshner Neil E. 
Published: February 2009

AbstractLymph node status is a key prognostic indicator in patients with bladder cancer, so lymphadenectomy is important for accurate staging. Moreover, lymphadenectomy is curative for some patients with nodal metastases. Although there is evidence that the quality of regional node dissection is associated with oncologic outcome, controversy exists because other factors may also explain this observation. Consequently, there is no consensus regarding the optimal extent of lymphadenectomy and number of nodes that should be assessed. J. Surg. Oncol. 2009;99:225–231. © 2009 Wiley‐Liss, Inc.
Surgery after neoadjuvant chemotherapy for colorectal liver metastases is safe and feasible in elderly patients
Authors: Tamandl Dietmar , Gruenberger Birgit , Herberger Beata , Kaczirek Klaus , Gruenberger Thomas 
Published: February 2009

AbstractBackgroundSurgery for colorectal liver metastases is part of the endeavor to cure metastatic colorectal cancer (mCRC). Neoadjuvant chemotherapy increases progression free survival in resectable patients. The safety and feasibility of this concept has not been investigated in elderly patients.MethodsWe performed a comparative analysis of data from 244 patients who were resected for colorectal liver metastases between 1999 and 2004 at our institution. Seventy patients were aged 70 or older; they form the basis of this analysis.ResultsTwenty‐nine patients received neoadjuvant chemotherapy (oxaliplatin‐based chemotherapy (XELOX), 19; 5‐fluorouracil (5‐FU), 10) prior to surgery. XELOX was associated with higher response rates to chemotherapy (CR + PR: XELOX 68% vs. 5‐FU 0%, P = 0.001), and responding patients had a better overall (OS, P < 0.001) and recurrence free survival (RFS, P < 0.001) compared to others. Response to neoadjuvant chemotherapy was the only factor on multivariate analysis predicting longer OS and RFS (P = 0.01 and P = 0.001).ConclusionNeoadjuvant chemotherapy can be administered safely in patients older than 70 years and appears to be effective in prolonging long‐term outcome. Patients responding to neoadjuvant treatment have a significantly better prognosis after liver resection. J. Surg. Oncol. 2009;100:364–371. © 2009 Wiley‐Liss, Inc.
Losing a loved one to homicide: Prevalence and mental health correlates in a national sample of young adults
Authors: Zinzow Heidi M. , Rheingold Alyssa A. , Hawkins Alesia O. , Saunders Benjamin E. , Kilpatrick Dean G. 
Published: February 2009

AbstractThe present study examined the prevalence, demographic distribution, and mental health correlates of losing a loved one to homicide. A national sample of 1,753 young adults completed structured telephone interviews measuring violence exposure, mental health diagnoses, and loss of a family member or close friend to a drunk driving accident (vehicular homicide) or murder (criminal homicide). The prevalence of homicide survivorship was 15%. African Americans were more highly represented among criminal homicide survivors. Logistic regression analyses found that homicide survivors were at risk for past year posttraumatic stress disorder (OR = 1.88), major depressive episode (OR = 1.64), and drug abuse/dependence (OR = 1.77). These findings highlight the significant mental health needs of homicide survivors.
Evidence for a curvilinear relationship between posttraumatic growth and posttrauma depression and PTSD in assault survivors
Authors: Kleim Birgit , Ehlers Anke 
Published: February 2009

AbstractTwo studies of assault survivors (Ns = 180, 70) examined associations between posttraumatic growth (PTG) and posttrauma psychopathology. Both studies found significant curvilinear associations between PTG and posttraumatic stress disorder, whereas only Study 1 found a curvilinear association between PTG and depression symptom severity. Survivors with no or high growth levels reported fewer symptoms than those who reported moderate growth. Study 1 also investigated potential PTG predictors. Non‐Caucasian ethnicity, religiousness, peritraumatic fear, shame, and ruminative thinking style, assessed at 2 weeks, predicted growth at 6 months. Posttraumatic growth may thus be most relevant in trauma survivors who attach enduring significance to the trauma for their lives and show initial distress. Moderate levels of PTG do not seem to ameliorate posttrauma psychopathology.
Test of the role of nicotine dependence in the relation between posttraumatic stress disorder and panic spectrum problems
Authors: Feldner Matthew T. , Smith Rose C. , Babson Kimberly A. , Sachs‐Ericsson Natalie , Schmidt Norman B. , Zvolensky Michael J. 
Published: February 2009

AbstractPosttraumatic stress disorder (PTSD) frequently co‐occurs with panic spectrum problems. Relatively little empirical work has tested possible mechanisms accounting for this association. Nicotine dependence often ensues subsequent to PTSD onset and research suggests smoking high numbers of cigarettes daily may lead to panic problems. The current study tested the hypotheses that nicotine dependence partially mediates the relations between PTSD and both panic attacks and panic disorder within a nationally representative sample of 5,692 (3,020 women; MAge = 45, SD = 18) adults from the National Comorbidity Survey–Replication. Results were consistent with hypotheses. These findings support the theory suggesting smoking among people with PTSD may be involved in the development of panic problems.
Sexual harassment in the Marines, posttraumatic stress symptoms, and perceived health: Evidence for sex differences
Authors: Shipherd Jillian C. , Pineles Suzanne L. , Gradus Jaimie L. , Resick Patricia A. 
Published: February 2009

AbstractSex differences and pretrauma functioning have been understudied in examinations of posttraumatic stress symptoms (PSS) and health. This study examined relationships between sexual harassment and assault in the military (MST), PSS, and perceived physical health when accounting for pre‐MST PSS, pre‐MST health, and current depression. Relationships were examined separately in 226 female and 91 male Marines endorsing recent MST (past 6 months). MST predicted increased PSS for women and especially men. For men, higher levels of MST were associated with worse perceived physical health, whereas for women, lower levels of MST were associated with worse perceived health. For men with MST, there was some evidence for the association being partially mediated by PSS, but no mediation was found in women.
Meta‐abilities and outsourcing: an individual based conceptual framework
Authors: Choudrie Jyoti , Grey Susan , Selamat Mohamad Hisyam 
Published: February 2009

AbstractOutsourcing is a strategy being considered appropriate to cope with the current turbulent times. In the information systems (IS) area, outsourcing has fastly become an essential part of an organization's IS strategy. By signing outsourcing agreements, firms expect to reduce their overall information technology (IT) costs, focus on their core competencies, and gain superior technical resources. This paper offers a conceptual model for the area of outsourcing, which is based primarily on the concept of meta‐abilities. The principal argument offered by this paper is that organizations need to develop meta‐abilities in order to facilitate the process of outsourcing. Copyright © 2009 John Wiley & Sons, Ltd.
Project‐based company's vital condition: structural coupling. An autopoietic view
Authors: Koskinen Kaj U. 
Published: February 2009

AbstractThis conceptual paper describes, with the help of autopoietic epistemology, the phenomenon of structural coupling in project‐based companies. First the concept of project‐based company is described. Then the discussion deals with the epistemological assumptions with the goal of getting a better understanding of the nature of knowledge and how it develops. This is followed by a brief illustrations of autopoietic and allopoietic systems. After that the concepts of structural determinism and coupling are highlighted. Then follow descriptions of the knowledge creation at both the individual and organizational levels. Also three factors (i.e. absorptive capacity, creative tension and resistance to change) that either foster or weaken possibilities to achieve structural coupling are illustrated. The paper's end concludes with a discussion concerning why structural coupling is necessary for project‐based companies, since because without it the company—in other words, an autopoietic system—disintegrates and the company's activities come to an end. Copyright © 2009 John Wiley & Sons, Ltd.
Applying wikis to managing knowledge—A socio‐technical approach
Authors: Kosonen Miia , Kianto Aino 
Published: February 2009

AbstractAs organizations are increasingly moving towards geographically dispersed and virtual forms of collaboration, knowledge sharing through social software such as wikis is widely acknowledged as an important area of research and practice. However, social software remains an under‐investigated issue in the literature on knowledge management (KM), and there is a lack of studies demonstrating how organizations can successfully incorporate these technologies into their everyday operations. To bridge this gap, our paper examines a case of successful wiki implementation. We claim that understanding the implementation of wikis requires a socio‐technical perspective focusing on the organizational context and activity system in which they are implemented rather than on their technological proficiency. Furthermore, we claim that their implementation brings about change in existing social systems, and results in new kinds of social constellations, interactions, and identities, which are manageable and controllable only to a limited extent. Copyright © 2009 John Wiley & Sons, Ltd.
Microphase‐Separated Poly(vinylpyridine) Block Copolymer Prepared with a Novel Bifunctional Initiator
Authors: Shoji Masami , Eguchi Masao , Layman John M. , Cashion Matthew P. , Long Timothy E. , Nishide Hiroyuki 
Published: February 2009

AbstractA vinylpyridine block copolymer was prepared by stepwise controlled/living radical polymerization with a novel bifunctional initiator, 4‐(2‐bromopropanoyloxy)‐N‐(p‐methylbenzyloxy)‐2,2,6,6‐tetramethylpiperidine. The initiator was synthesized in a facile manner using commercially available p‐xylene and 4‐hydroxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl (4‐hydroxy TEMPO). Through stepwise atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) and nitroxide‐mediated radical polymerization (NMRP) of 4‐vinylpyridine (4VP), the PMMA‐b‐P4VP copolymer was prepared with a wide range of the copolymer compositions. Microphase‐separation was demonstrated in cross sectional TEM images of self‐standing block copolymer membranes.magnified image
Biocomposites of Cellulose Acetate Butyrate with Modified Hemp Cellulose Fibres
Authors: Ouajai Sirisart , Shanks Robert A. 
Published: February 2009

AbstractCellulose acetate butyrate biocomposites, plasticized with tributyl citrate at volume fraction Vf = 0.1–0.3, were prepared with modified hemp. Inclusion of modified hemp fibres at Vf = 0.4 enhanced the modulus and strength of the flexible plasticized cellulose acetate butyrate. Composites containing pectate lyase enzyme treated fibres showed a modulus greater than untreated or alkali treated fibres, when compared at a similar fibre length of 100 µm. Composites containing the shortest alkali treated fibres of 45 µm gave the greatest property improvement, while 500 µm fibres showed worsened properties. Ball‐milled fibres provided reduced values of properties due to cellulose structural disruption, while compression moulding gave better compaction by removing voids.magnified image
ROCK inhibition enhances the recovery and growth of cryopreserved human embryonic stem cells and human induced pluripotent stem cells
Authors: Claassen David A. , Desler Michelle M. , Rizzino Angie 
Published: February 2009

AbstractPoor recovery of cryopreserved human embryonic stem (hES) cells and induced pluripotent stem (iPS) cells is a significant impediment to progress with pluripotent stem cells. In this study, we demonstrate that Y‐27632, a specific inhibitor of Rho kinase (ROCK) activity, significantly enhances recovery of hES cells from cryopreserved stocks when cultured with or without a growth inactivated feeder layer. Furthermore, treatment with the ROCK inhibitor for several days increased the number of colonies and colony size of hES cells compared to shorter exposures. Remarkably, hES cells that had formed relatively few colonies 5 days after thawing exhibited rapid growth upon addition of Y‐27632. Additionally, we determined that Y‐27632 significantly improves the recovery of cryopreserved human iPS cells and their growth upon subculture. Thus, Y‐27632 provides a means to “kick‐start” slow‐growing human pluripotent stem cells, especially after being thawed from frozen stocks. Together, these results argue that Y‐27632 is a useful tool in overcoming obstacles to studies involving the cultivation of both hES cells and human iPS cells. Mol. Reprod. Dev. 76: 722–732, 2009. © 2009 Wiley‐Liss, Inc.
On the cycle polytope of a directed graph and its relaxations
Authors: Balas Egon , Stephan Rüdiger 
Published: February 2009

AbstractWe continue the investigation of the cycle polytope of a digraph begun by Balas and Oosten (Networks 36 (2000), 34–46) and derive a rich family of facets that cut off the origin and are not related to facets of the traveling salesman polytope. This disproves a claim in (Balas and Oosten 36 (2000), 34–46) that the only such facets are those defined by the linear ordering inequalities. After examining the relationship between the cycle polytope, its dominant, and the upper cycle polyhedron, we turn to the polar relationship between cycles and permutations or transitive tournaments. Our central result is a characterization of the relationship between facets of the dominant of the cycle polytope, facets of the cycle polytope that cut off the origin, and vertices of the linear relaxation of the transitive tournament polytope. © 2009 Wiley Periodicals, Inc. NETWORKS, 2009
Ionic conductivity in poly (L‐leucine)1,3‐diamino propane–lithium iodide solid polymer electrolyte
Authors: Kaus N. H. , Lahazan N. , Ahmad A. H. 
Published: February 2009

AbstractThe pelletized Poly(L‐Leucine)‐1,3‐diamino propane–lithium iodide (LiI) samples have been prepared by using a low temperature sintering method. Results from impedance spectroscopy have proven this mixture to be a superionic material with maximum conductivity obtained in the range of 10−3 S/cm for the samples containing 50 wt% LiI. The high ionic conductivity achieved was due to the increased number of charge carrier from LiI. Improved conductivity could also be due to hopping of lithium ion through the side chain of polymer. Infrared spectroscopy showed that both LiI and poly amino acid may co‐exist together. From the spectra it is revealed that the CO band at 1643 cm−1 shifted to higher wave number indicating that chelation of Li+ may have occurred at oxygen atom. Results from X‐ray diffraction show that the prepared samples were partially crystalline in nature. Some of the peaks have disappeared and this confirmed that some complexation has occurred within the sample. Copyright © 2009 John Wiley & Sons, Ltd.