bluuebunny/crossref_metadata_2025_split huggingface dataset:
An in vitro evaluation on the percutaneous sites of MAO‐treated implants
Authors: Wang Xiaojing , Chen Faming , Wang Guowei , Ma Wei , Zhao Yimin 
Published: June 2008

AbstractMicroarc oxidation (MAO) was considered to be one of the most effective surface coating techniques to improve the osseointegration of the implants. However, the influences of such coating on the skin epithelium interface still gained less attention in present literatures. Clinical data showed that 15–20% of patients might have an infection following prosthetic rehabilitation because of the percutaneous problems. Epithelial downgrowth around transcutaneous implants associated with infections can occur due to the inappropriate materials and surface structures of the implants. Aimed at evaluating the biological properties of the percutaneous sites of the MAO‐treated titanium implants, the behavior of human skin epithelial cell (HSEC) and the Staphylococcus aureus (S. aureus) on the MAO‐treated and the untreated titanium (Un_Ti) surfaces were evaluated using in vitro models. Our results showed that MAO‐treated titanium surfaces did not well support the growth, adhesion, and proliferation of HSEC. Additionally, they were much more susceptible to S. aureus when compared with untreated titanium (Un_Ti) surfaces. Analysis of our data, taken together, revealed that MAO‐treated titanium surfaces may not be suited for the interfacing devices with human skin epithelium. Un_Ti surfaces showed a more satisfactory biocompatibility to the HSEC, as well as better in the prevention of S. aureus adhesion and multiplication. Therefore, we suggest that MAO treatment on the “percutaneous sites” should be carefully reconsidered in the next generation of MAO‐treated implants. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2008
Discretization techniques for the efficient solution of the eigenvalue problem in heterostructures
Authors: Kougianos Elias , Mohanty Saraju P. 
Published: June 2008

AbstractA systematic development of efficient discretization schemes for the numerical evaluation of the eigenvalues of the single‐band effective mass equation that describes the motion of electrons in an ideal periodic crystal is presented. The approach presented makes use of the translational symmetry of the crystal lattice and utilizes the quantum mechanical properties of the momentum operator as the generator of spatial translation. Boundary conditions satisfied at the heterointerfaces are explicitly incorporated in the discretization procedure and the effects of this approach in overall accuracy are evaluated by studying a prototype quantum well heterostructure. Copyright © 2008 John Wiley & Sons, Ltd.
Some non‐local problems for the parabolic‐hyperbolic type equation with complex spectral parameter
Authors: Karimov E. T. 
Published: June 2008

AbstractIn the present paper the unique solvability of two non‐local problems for the mixed parabolic‐hyperbolic type equation with complex spectral parameter is proved. Sectors for values of the spectral parameter where these problems have unique solutions are shown. Uniqueness of the solution is proved by the method of energy integral and existence is proved by the method of integral equations. In particular cases, eigenvalues and corresponding eigenfunctions of the studied problems are found. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Asymptotic Dirichlet problem for the Schrödinger operator on negatively curved manifolds
Authors: Kim Seok Woo , Lee Yong Hah 
Published: June 2008

AbstractIn this paper, we consider the asymptotic Dirichlet problem for the Schrödinger operator on a Cartan–Hadamard manifold with suitably pinched curvature. With potentials satisfying a certain decay rate condition, we give the solvability of the asymptotic Dirichlet problem for the Schrödinger operator. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Equations of Hurwitz schemes in the infinite Grassmannian
Authors: Muñoz Porras José M. , Plaza Martín Francisco J. 
Published: June 2008

AbstractThe main result proved in the paper is the computation of the explicit equations defining the Hurwitz schemes of coverings with punctures as subschemes of the Sato infinite Grassmannian. As an application, we characterize the existence of certain linear series on a smooth curve in terms of soliton equations. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Lp ‐estimates for the Bergman projection on strictly pseudoconvex nonsmooth domains
Authors: Ehsani Dariush , Lieb Ingo 
Published: June 2008

AbstractWe consider the Bergman projection on Henkin–Leiterer domains, bounded strictly pseudoconvex domains which have defining functions whose gradient is allowed to vanish. Our result describes the mapping properties of the Bergman projection between weighted Lp spaces, with the weights being powers of the gradient of the defining function. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Exercise and dietary change after diagnosis and cancer‐related symptoms in long‐term survivors of breast cancer: CALGB 79804
Authors: Alfano Catherine M. , Day Jeannette M. , Katz Mira L. , Herndon James E. , Bittoni Marisa A. , Oliveri Jill M. , Donohue Kathleen , Paskett Electra D. 
Published: June 2008

AbstractObjective: Improving diet and exercise can reduce survivors' risk of cancer‐related fatigue, poor physical functioning, and potential recurrence. A cancer diagnosis can represent a ‘teachable moment’, leading survivors to make positive changes in diet and exercise behaviors; however, little is known about how often this occurs or about factors that enhance or limit survivors' ability to make these changes. This cross‐sectional descriptive study investigated both the prevalence and clustering of self‐reported changes in diet and exercise and how these changes related to ongoing cancer‐related symptoms, social support, and stressful life events among long‐term breast cancer survivors.Methods: Survivors (n=227, response rate=72%) of a prior Cancer and Leukemia Group B treatment trial, on average 12 years post‐diagnosis, completed a mailed survey assessing health behavior changes since diagnosis and current symptoms, social support, and stressful life events.Results: Over half of survivors reported making positive exercise or diet changes since diagnosis: over 25% reported making exercise and diet changes. Analyses of covariance models showed that survivors who reported increasing their exercise also reported lower fatigue. Trends were also found between increased fruit and vegetable intake and decreased fatigue and between increased exercise and increased social support.Conclusions: These results underscore the need for health promotion efforts among survivors. Exercise promotion is especially needed since more survivors attempted to change dietary behaviors than exercise on their own. Further, fatigue may limit survivors' ability to change their health behaviors; alternatively, survivors who increase their exercise may experience less fatigue. Copyright © 2008 John Wiley & Sons, Ltd.
Deciphering the role of the electrostatic interactions in the α‐tropomyosin head‐to‐tail complex
Authors: Corrêa Fernando , Salinas Roberto Kopke , Bonvin Alexandre M. J. J. , Farah Chuck S. 
Published: June 2008

AbstractSkeletal α‐tropomyosin (Tm) is a dimeric coiled‐coil protein that forms linear assemblies under low ionic strength conditions in vitro through head‐to‐tail interactions. A previously published NMR structure of the Tm head‐to‐tail complex revealed that it is formed by the insertion of the N‐terminal coiled‐coil of one molecule into a cleft formed by the separation of the helices at the C‐terminus of a second molecule. To evaluate the contribution of charged residues to complex stability, we employed single and double‐mutant Tm fragments in which specific charged residues were changed to alanine in head‐to‐tail binding assays, and the effects of the mutations were analyzed by thermodynamic double‐mutant cycles and protein–protein docking. The results show that residues K5, K7, and D280 are essential to the stability of the complex. Though D2, K6, D275, and H276 are exposed to the solvent and do not participate in intermolecular contacts in the NMR structure, they may contribute to head‐to‐tail complex stability by modulating the stability of the helices at the Tm termini. Proteins 2008. © 2008 Wiley‐Liss, Inc.
A robust approach for analyzing a heterogeneous structural ensemble
Authors: Lowry David F. , Hausrath Andrew C. , Daughdrill Gary W. 
Published: June 2008

AbstractIntrinsically unstructured proteins (IUP) are widespread in eukaryotes and participate in numerous cellular processes, but a structural explanation of the mechanisms they use to recognize and bind their diverse targets has proved elusive. Transcriptional activator domains are one class of IUP that function by recruiting other factors into basal transcription complexes. Transcriptional activator domains are known to use electrostatic interactions for recognition, but it is unclear how this could be accomplished by a structurally heterogeneous ensemble. To investigate this question, we performed principal component analysis on the atomic contact maps of an experimentally restrained ensemble of the human p53 transcriptional activator domain. This analysis revealed that the ensemble is conspicuously nonrandom and permitted a straightforward identification of persistent structural features and their relative probabilities. It was observed that six predominant long‐range contacts are combinatorially arranged in 13 clusters of structures. Potential surfaces of the aligned clusters showed that these contacts uniformly organize the negative charges of the highly acidic p53 transcriptional activator domain on one face of the clusters. This observation provides a structural basis for the recruitment of other factors into basal transcription complexes and further supports the hypothesis that the structural ensembles of IUPs are not random and instead have evolved under selection to maintain specific structural features. Proteins 2008. © 2008 Wiley‐Liss, Inc.
Highly efficient near‐infrared to visible upconversion luminescence in transparent glass ceramics containing Yb3+/Er3+:NaYF4 nanocrystals
Authors: Huang Ping , Liu Feng , Chen Daqin , Wang Yuansheng , Yu Yunlong 
Published: June 2008

AbstractThe frequency upconversion emissions of NaYF4 nanocrystals embedded in transparent glass ceramics codoped with Yb3+/Er3+, prepared by melt quenching and subsequent heating, were investigated. It was found that, compared with that of the sample singly doped with 0.5Er3+, the intensities of the green and red upconversion luminescence increased by about 30 and 150 times, respectively, for the sample codoped with 0.5Er3+/1.0Yb3+, attributed to the efficient energy transfer from Yb3+ with high absorption cross section to Er3+ (both of them were concentrated in the NaYF4 nanocrystals). The intense visible upconversion luminescence and the convenient, low‐cost synthesis of the glass ceramic make it an excellent substitutional material for the unobtainable bulk NaYF4 crystals potentially applicable in many fields. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Near‐field second‐harmonic generation from gold nanoellipsoids
Authors: Celebrano M. , Biagioni P. , Finazzi M. , Duò L. , Zavelani‐Rossi M. , Polli D. , Labardi M. , Allegrini M. , Grand J. , Adam P.‐M. , Royer P. , Cerullo G. 
Published: June 2008

AbstractThe cover picture of this issue of physica status solidi (c) has been taken from the article [1]. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Do science and money go together? The case of the French biotech industry
Authors: Durand Rodolphe , Bruyaka Olga , Mangematin Vincent 
Published: June 2008

AbstractDeveloping technological applications, entering exploitation alliances, and choosing between research‐ or service‐focused strategic orientations are decisions that high‐tech firms must manage concurrently. This article explores systematically the contrasting effects of these strategic determinants on rent generation and rent appropriation using the entire population of French biotech firms (1994–2002). Findings indicate that science and money do not unconditionally go together–the direct relationship between rent‐accruing resources (e.g., patents or articles) and rent appropriation varies depending on the type of resources and the strategic orientation. Moreover, the effects of strategic determinants differ for rent generation vs. rent appropriation: 1) technological application diversity undermines a firm's capacity to appropriate rents–in particular for research‐oriented firms; 2) exploitation alliances favor rent generation but hinder rent appropriation; 3) service‐oriented firms exhibit significantly better performance than research‐oriented firms. Such evidence challenges the emergence in the biotechnology industry of a ‘one‐best’ strategic trajectory, as represented by research‐intensive start‐ups funded by private money engaged in publishing and patenting races. Copyright © 2008 John Wiley & Sons, Ltd.
Ultrasound assessment of fetal head–perineum distance before induction of labor
Authors: Eggebø T. M. , Heien C. , Økland I. , Gjessing L. K. , Romundstad P. , Salvesen K. Å. 
Published: June 2008

AbstractObjectivesTo evaluate fetal head–perineum distance measured by ultrasound imaging as a predictive factor for induction of labor, and to compare this distance with maternal factors, the Bishop score and ultrasound measurements of cervical length, cervical angle and occiput position.MethodsThe study included 275 women admitted for induction of labor. The fetal head–perineum distance was measured by transperineal ultrasound imaging as the shortest distance from the outer bony limit of the fetal skull to the skin surface of the perineum. Cervical length and angle was measured by transvaginal ultrasound examination, and fetal head position was assessed by transabdominal ultrasound imaging. The Bishop score was assessed without knowledge of ultrasound measurements. Receiver–operating characteristics (ROC) curves were used for evaluation of the probability of a successful vaginal delivery. The time from induction to delivery was tested using Cox regression analysis with ultrasound measurements, parity and body mass index (BMI) as possible predictive factors.ResultsAreas under the ROC curve for prediction of vaginal delivery were 62% (95% CI, 52–71%) for fetal head–perineum distance (P = 0.03), 61% (95% CI, 51–71%) for cervical length (P = 0.03), 63% (95% CI, 52–74%) for cervical angle (P = 0.02), 61% (95% CI, 52–70%) for Bishop score (P = 0.03) and 60% (95% CI, 51–69%) for BMI (P = 0.05). The Cesarean delivery rate was 22% among nulliparous and 5% among parous women (P < 0.01). Parity, fetal head–perineum distance, cervical length and cervical angle were contributing factors predicting vaginal delivery within 24 h in a Cox regression model. Occiput posterior position had no significant predictive value.ConclusionsFetal head–perineum distance measured by transperineal ultrasound examination can predict vaginal delivery after induction of labor, with a predictive value similar to that of ultrasonographically measured cervical length and the Bishop score. However, we judge none of these methods used alone to be good enough in a clinical setting. Copyright © 2008 ISUOG. Published by John Wiley & Sons, Ltd.
Cholesterol oxides in swedish foods and food ingredients: Butter and cheese
Authors: Nourooz‐Zadeh Jaffar , Appelqvist Lars‐Åke 
Published: June 2008

AbstractFresh butter manufactured by batch or continuous technologies in Sweden contained only traces of 7‐ketocholesterol at the detection limit (0.1 ppm in the lipids) and no detectable levels of other common cholesterol oxides. Storage at 4°C for up to four mo caused an increase in the levels of the isomeric 5,6‐epoxycholestanols, the epimeric 7‐hydroxycholesterols, 20α‐hydroxycholesterol and 7‐ketocholesterol as revealed by Lipidex chromatography, TEAP‐Lipidex chromatography and GLC. Heating of butter for 10 min at the temperature interval 150–200°C under conditions similar to that in shallow‐pan kitchen frying caused a gradual increase in the total amount of cholesterol oxides from 0 to 2.5 ppm, while at 200°C the total amount of cholesterol oxides was 1.6 ppm. Butter heated five min at 200°C also had less cholesterol oxides than that heated at 190°C for 10 min. Industrially manufactured butter oil and cream oil contained only low levels of some of the cholesterol oxides. Further, three types of processed cheese (soft‐melted, hard‐melted and grated cheese) were investigated. The soft‐melted and the hard‐melted cheese types contained only traces of some of the oxides, while the grated cheese samples had 0.5–2.2 ppm of the total cholesterol oxides in the lipids.
Effect of electrolytes on foaming of nonionic surfactant solutions
Authors: Schott Hans 
Published: June 2008

AbstractThe effect of electrolytes and other additives on the foaming of solutions of the nonionic surfactant octoxynol 9 (Triton X‐100) was investigated and correlated with their effect on the cloud point. Foams were generated by pouring solutions as a thin stream into a vertical tube. The height of the generally fast‐draining foam columns was measured as a function of time, and their stability was rated according to the damage sustained within 13 min. The surfactant concentrations used, 0.050, 0.100 and 2.00%, were above the critical micelle concentration. Increasing concentrations increased foam height but not foam stability.The electrolytes NaCl and Na2SO4 salted the surfactant out. They reduced its cloud point in proportion to their concentration. They also reduced the foam height, albeit to a lesser extent than the cloud point, but hardly reduced the foam stability below the cloud point.Electrolytes which salted the surfactant in, raising its cloud point by complexation of their cations with the ether oxygens of the surfactant, namely HCl, H2SO4 and Mg(NO3)2, produced no major changes in either foam height or foam stability. The exception was Al(NO3)3, which reduced the foam height by increasing the viscosity of the solutions. Urea and NaSCN, which raised the cloud point by breaking the structure of water, and to a lesser extent citric acid, reduced the foam stability but produced no major changes in foam height.Heating the solutions below their cloud point reduced the stability of all foams, especially of those which were the least stable at the lower temperatures. When the cloud point was exceeded by 5 C through a combination of added NaCl and heating, foam height and foam stability decreased significantly. At 10 C above the cloud point, the foam height was reduced to 1/6 of that at 12 C below the cloud point, but the former foam was slow draining and rather stable.
Interaction of lodine with nonionic surfactant and polyethylene glycol in aqueous potassium lodide solution
Authors: Chang Jung‐Hung , Ohno Makoto , Esumi Kunio , Meguro Kenjiro 
Published: June 2008

AbstractWhen a nonionic surfactant, such as hexaoxyethylene glycol dodecyl ethers (6ED) is added to an aqueous iodine solution in the presence of potassium iodide, some spectral changes corresponding to the interaction of iodine‐potassium iodide mixture with 6ED are found above the critical micelle concentration (CMC) of 6ED. The absorption maximum bands of complexes formed between 6ED and iodine are significantly different from those formed between 6ED and iodine‐potassium iodide mixture in aqueous solution. The complexes of iodic compounds (such as iodine, triiodide ion and polyiodide ion) with 6ED show absorption bands at 390 nm, 370 nm and 385 nm which are assigned to an interaction between iodine‐6ED, triiodide ion‐6ED and polyiodide ion‐6ED, respectively.When the concentration of polyethylene glycol (PEG, MW=200–600) becomes high in aqueous triiodide ion solution, the maximum absorption wavelength of triiodide ion solution also shifts toward 370 nm, similar to that of the triiodide ion‐6ED complex.If it is assumed that the absorbance between I3− and the EO chain in 6ED is the same as that between I3− and the EO chain of PEG, the concept of effective EO number can be applied to explain the behavior in the absorption spectra among I3−, 6ED and PEG. Here, the effective EO number is defined as the product of EO chain length and concentration of each 6ED and PEG in the complexes.The effective EO number and concentration of PEG decrease in the triiodide ion‐PEG complex as the molecular weight of PEG becomes large. Moreover, the effective EO number and concentration of 6ED are lower than those of PEG at all maximum absorption wavelengths.
Biodegradation of nonionic surfactants containing propylene oxide
Authors: Naylor Carter G. , Castaldi Frank J. , Hayes Barbara J. 
Published: June 2008

AbstractInsertion of oxypropylene groups into the polyoxyethylene chain of fatty and oxo alcohol ethoxylates decreased the rate and extent of biodegradation. The magnitude of the effects was proportional to the PO‐block size and the extent of branching in the alcohol. Data are presented from a series of PO‐containing nonionic surfactants in semi‐continuous activated sludge reactors over test periods of up to 12 weeks. Bioassays performed on effluents from the SCAS units showed little or no toxicity due to residual degradation metabolities towardPimephales promelas andDaphnia pulex and a stimulatory effect onSelenastrum capricornutum growth rate.
Kidney disease in nail–patella syndrome
Authors: Lemley Kevin V. 
Published: June 2008

AbstractNail–patella syndrome (NPS) is a pleiotropic autosomal-dominant disorder due to mutations in the gene LMX1B. It has traditionally been characterized by a tetrad of dermatologic and musculoskeletal abnormalities. However, one of the most serious manifestations of NPS is kidney disease, which may be present in up to 40% of affected individuals. Although LMX1B is a developmental LIM-homeodomain transcription factor, it is expressed in post-natal life in the glomerular podocyte, suggesting a regulatory role in that cell. Kidney disease in NPS seems to occur more often in some families with NPS, but it does not segregate with any particular mutation type or location. Two patterns of NPS nephropathy may be distinguished. Most affected individuals manifest only an accelerated age-related loss of filtration function in comparison with unaffected individuals. Development of symptomatic kidney failure is rare in this group, and proteinuria (present in approximately one-third) does not appear to be progressive. A small minority (5–10%) of individuals with NPS develop nephrotic-range proteinuria as early as childhood or young adulthood and progress to end-stage kidney failure over variable periods of time. It is proposed that this latter group reflects the effects of more global podocyte dysfunction, possibly due to the combination of a mutation in LMX1B along with an otherwise innocuous polymorphism or mutation involving any of several genes expressed in podocytes (e.g.NPHS2,CD2AP), the transription of which is regulated by LMX1B.