bluuebunny/crossref_metadata_2025_split huggingface dataset:
The expression of the Hangenberg Event (latest Devonian) in a relatively shallow-marine succession (Pomeranian Basin, Poland): the results of a multi-proxy investigation
Authors: MATYJA HANNA , SOBIEŃ KATARZYNA , MARYNOWSKI LESZEK , STEMPIEŃ-SAŁEK MARZENA , MAŁKOWSKI KRZYSZTOF 
Published: August 2014

AbstractThe uppermost Famennian – lowermost Tournaisian interval has been analysed in detail using biostratigraphy, sedimentology, magnetic susceptibility and geochemistry in a reference section of the relatively shallow carbonate ramp environment within the Pomeranian Basin. High-resolution biostratigraphic study, based on miospores, allows recognition of the standard western Europeanlepidophyta–nitidus(LN) andverrucosus–incohatus(VI) zones, as well as theConvolutispora majorZone, a local Pomeranian equivalent of the European standardhibernicus–distinctus(HD) Zone. The sedimentary succession and specific phenomena recognized close to the Devonian/Carboniferous boundary, such as fluctuations in water column euxinia, wildfire evidence, relative sea-level changes and perturbations of the carbon cycle reflected by positive carbon excursions, display a pattern partly similar to that observed in many areas in Europe during the Hangenberg Event, although the Hangenberg Black Shale horizon is not developed here. These important microscale environmental perturbations were observed not only within the Famennian LN miospore Zone but in a wide interval between the LN and the lowermost localConvolutispora majormiospore zones ( = lower part of HD standard miospore Zone). It is still uncertain whether the recognized event(s) were connected solely with the Hangenberg Event, which was possibly complex and multi-phased as is sometimes suggested, or whether they represent a succession of regionally limited, post-Hangenberg events. This question needs to be further investigated on broader stratigraphic and geographical scales.
Environmental quality: impact of economic growth
Authors: Bansal Sangeeta 
Published: August 2014

AbstractUsing a vertically differentiated product model, the paper aims to investigate the effects of economic growth on market provision of product quality. The quality attribute considered is the environmental friendliness of products. Economic growth is modeled as a shift in income distribution. It shows that the effect of economic growth depends on the form it takes. A growth in income that is uniform across consumers improves the cleanup levels adopted by both firms. However, a growth in income that is accompanied by changes in income inequality may result in the lowering of one of the two qualities. More specifically, if the growth in income is accompanied by increased disparities in income distribution, the quality of the (environmentally) inferior variant is reduced. This has serious implications for the poor consumers if the product has safety or health hazards. The paper suggests a regulatory measure to prevent such deterioration in the quality of the inferior variant.
Building Confidence in Elections: The Case of Electoral Monitors in Kosova
Authors: Brancati Dawn 
Published: August 2014

AbstractWhile most research on electoral monitors has focused on the effect of electoral monitors on politicians and their behavior in terms of committing electoral fraud, this study examines the effect of electoral monitors on citizens, and their effect, in particular, on people's perceptions of electoral integrity and behavior in terms of turnout at the polls. To examine this relationship, I conducted a field experiment around the 2009/2010 municipal elections in Kosova, which varied the amount of information people had about the responsibilities of monitors in these elections. In the experiment, people who had more information about the monitors' responsibilities believed that the elections were more free and fair than those who had less information, and also believed that the monitors helped make these elections more free and fair, even though they were not more likely to vote as a result.
Thermoelectric Seebeck effect in oxide-based resistive switching memory
Authors: Wang Ming , Bi Chong , Li Ling , Long Shibing , Liu Qi , Lv Hangbing , Lu Nianduan , Sun Pengxiao , Liu Ming 
Published: August 2014

AbstractReversible resistive switching induced by an electric field in oxide-based resistive switching memory shows a promising application in future information storage and processing. It is believed that there are some local conductive filaments formed and ruptured in the resistive switching process. However, as a fundamental question, how electron transports in the formed conductive filament is still under debate due to the difficulty to directly characterize its physical and electrical properties. Here we investigate the intrinsic electronic transport mechanism in such conductive filament by measuring thermoelectric Seebeck effects. We show that the small-polaron hopping model can well describe the electronic transport process for all resistance states, although the corresponding temperature-dependent resistance behaviours are contrary. Moreover, at low resistance states, we observe a clear semiconductor–metal transition around 150 K. These results provide insight in understanding resistive switching process and establish a basic framework for modelling resistive switching behaviour.
Experimental basis for a new allosteric model for multisubunit proteins
Authors: Viappiani Cristiano , Abbruzzetti Stefania , Ronda Luca , Bettati Stefano , Henry Eric. R. , Mozzarelli Andrea , Eaton William A. 
Published: August 2014

Significance
Although the theoretical model of Monod, Wyman, and Changeux (MWC) is one of the most influential and highly cited theoretical models in bioscience, it fails to explain allosteric effects in hemoglobin, the paradigm of allostery, because their model considers only quaternary preequilibria. By using a new kind of laser photolysis experiment, measurements of ligand rebinding kinetics for transient hemoglobin conformations trapped by encapsulation in silica gels support the simplest possible extension of the MWC allosteric model to include tertiary in addition to quaternary conformational preequilibria. While the MWC model provides a qualitative explanation for allostery in many multisubunit proteins, quantitative analysis will most probably require the extension used here to explain our new results.
Association of First-Line and Second-Line Antiretroviral Therapy Adherence
Authors: Ramadhani Habib O. , Bartlett John A. , Thielman Nathan M. , Pence Brian W. , Kimani Stephen M. , Maro Venance P. , Mwako Mtumwa S. , Masaki Lazaro J. , Mmbando Calvin E. , Minja Mary G. , Lirhunde Eileen S. , Miller William C. 
Published: August 2014

Background.  Adherence to first-line antiretroviral therapy (ART) may be an important indicator of adherence to second-line ART. Evaluating this relationship may be critical to identify patients at high risk for second-line failure, thereby exhausting their treatment options, and to intervene and improve patient outcomes.Methods.  Adolescents and adults (n = 436) receiving second-line ART were administered standardized questionnaires that captured demographic characteristics and assessed adherence. Optimal and suboptimal cumulative adherence were defined as percentage adherence of ≥90% and &lt;90%, respectively. Bivariable and multivariable binomial regression models were used to assess the prevalence of suboptimal adherence percentage by preswitch adherence status.Results.  A total of 134 of 436 (30.7%) participants reported suboptimal adherence to second-line ART. Among 322 participants who had suboptimal adherence to first-line ART, 117 (36.3%) had suboptimal adherence to second-line ART compared with 17 of 114 (14.9%) who had optimal adherence to first-line ART. Participants who had suboptimal adherence to first-line ART were more likely to have suboptimal adherence to second-line ART (adjusted prevalence ratio, 2.4; 95% confidence interval, 1.5–3.9).Conclusions.  Adherence to first-line ART is an important predictor of adherence to second-line ART. Targeted interventions should be evaluated in patients with suboptimal adherence before switching into second-line therapy to improve their outcomes.
Seroincidence of Influenza Among HIV-infected and HIV-uninfected Men During the 2009 H1N1 Influenza Pandemic, Bangkok, Thailand
Authors: Garg Shikha , Olsen Sonja J. , Fernandez Stefan , Muangchana Charung , Rungrojcharoenkit Kamonthip , Prapasiri Prabda , Katz Jacqueline M. , Curlin Marcel E. , Gibbons Robert V. , Holtz Timothy H. , Chitwarakorn Anupong , Dawood Fatimah S. 
Published: August 2014

Abstract
Among 368 Thai men who have sex with men with paired serum samples collected before and during the 2009 H1N1 influenza pandemic, we determined influenza A (H1N1)pdm09 seroconversion rates (≥4-fold rise in antibody titers by hemagglutination inhibition or microneutralization assays). Overall, 66 of 232 (28%) participants seroconverted after the first year of A(H1N1)pdm09 activity, and 83 of 234 (35%) participants seroconverted after the second year. Influenza A(H1N1)pdm09 seroconversion did not differ between human immunodeficiency virus (HIV)-infected (55 of 2157 [35%]) and HIV-uninfected (71 of 2211 [34%]) participants (P = .78). Influenza A(H1N1)pdm09 seroconversion occurred in approximately one third of our Thai study population and was similar among HIV-infected and HIV-uninfected participants.
Near‐Infrared Hyperspectral Imaging of Fusarium‐Damaged Oats (Avena sativa L.)
Authors: Tekle Selamawit , Måge Ingrid , Segtnan Vegard H. , Bj⊘rnstad Åsmund 
Published: August 2014

ABSTRACTThe feasibility of hyperspectral imaging (HSI) to detect deoxynivalenol (DON) content and Fusarium damage in single oat kernels was investigated. Hyperspectral images of oat kernels from a Fusarium‐inoculated nursery were used after visual classification as asymptomatic, mildly damaged, and severely damaged. Uninoculated kernels were included as controls. The average spectrum from each kernel was paired with the reference DON value for the same kernel, and a calibration model was fitted by partial least squares regression (PLSR). To correct for the skewed distribution of DON values and avoid nonlinearities in the model, the DON values were transformed as DON* = [log(DON)]3. The model was optimized by cross‐validation, and its prediction performance was validated by predicting DON* values for a separate set of validation kernels. The PLSR model and linear discriminant analysis classification were further used on single‐pixel spectra to investigate the spatial distribution of infection in the kernels. There were clear differences between the kernel classes. The first component separated the uninoculated and asymptomatic from the severely damaged kernels. Infected kernels showed higher intensities at 1,925, 2,070, and 2,140 nm, whereas noninfected kernels were dominated by signals at 1,400, 1,626, and 1,850 nm. The DON* values of the validation kernels were estimated by using their average spectra, and the correlation (R) between predicted and measured DON* was 0.8. Our results show that HSI has great potential in detecting Fusarium damage and predicting DON in oats, but it needs more work to develop a model for routine application.
First Report of Rust Caused by Puccinia psidii on Eucalyptus dunnii in Uruguay
Authors: Pérez C. A. , Reyna R. , Montanari L. , Torres-Dini D. , Nikichuk N. , Simeto S. 
Published: August 2014

Eucalypt rust caused by Puccinia psidii Winter represents a major disease affecting eucalypt production in South America, and is threatening myrtaceous hosts worldwide. In Uruguay, it was first detected infecting Eucalyptus globulus in 2001 (4) and later on E. grandis, Myrrhinium atropurpureum, and Myrcianthes pungens, two myrtaceae hosts native to Uruguay (3). Over the summer 2013, bright orange-yellowish pustules were detected on stock plants of E. dunnii in a nursery located in western Uruguay, province of Paysandú. A severe and explosive epidemic was readily observed. Affected leaves were taken to the laboratory and examined under the microscope. Uredinia and urediniospores were similar with those described previously in Uruguay on other hosts (3,4). Uredioniospores were 18 to 25 × 15 to 21 μm, yellow, unicellular, spherical to elliptical, base truncate, finely and uniformly echinulate with spines up to 1 μm long, with an evident bald patch without spines. To confirm identity of this fungus, genomic DNA was extracted from single-pustule urediniospores, and ITS region was amplified using primers PR1 and PR2 (1) with PCR conditions previously described (3). Forward and reverse sequences from three single pustules were obtained, assembled, and compared with those available in GenBank using BLAST searches. Obtained sequences showed to be identical to those analyzed by Pérez et al. (2011) collected from E. grandis and E. globulus, with no variation found in the analyzed region. A 100% identity was found with isolates UY1374 and UY1375 obtained from E. globulus, and with isolate UY1731 obtained from E. grandis (FJ710805, FJ710806, and FJ710807, respectively). Sequences were deposited in GenBank with accession numbers KM083129, KM083130, and KM083131. Even though this pathogen is known to occur in a wide variety of myrtaceous species, to our knowledge, this is the first natural infection record of P. psidii on E. dunnii in Uruguay and worldwide. This report confirms previous studies that indicated the susceptibility of E. dunnii when inoculated under controlled conditions (2,5). E. dunnii is being widely planted in Uruguay, eastern Argentina, and southern Brazil, with increasing significance to the pulp industry. Although the consequences of this finding have yet to be realized, scouting plantations is essential to estimate the real impact of this pathogen on this tree species. Our study contributes to expand the host range known for this globally important pathogen. References: (1) S. R. H. Langrell et al. Plant Pathol. 57:687, 2008. (2) L. Morin et al. PLoS ONE 7:e35434, 2012. (3) C. A. Pérez et al. Mycol. Progress 10:273, 2011. (4) N. Telechea et al. Plant Pathol. 52:427, 2003. (5) E. A. V. Zauza et al. Australas. Plant Pathol. 39:406, 2010.
Mixtures as a Fungicide Resistance Management Tactic
Authors: van den Bosch Frank , Paveley Neil , van den Berg Femke , Hobbelen Peter , Oliver Richard 
Published: August 2014

We have reviewed the experimental and modeling evidence on the use of mixtures of fungicides of differing modes of action as a resistance management tactic. The evidence supports the following conclusions. 1. Adding a mixing partner to a fungicide that is at-risk of resistance (without lowering the dose of the at-risk fungicide) reduces the rate of selection for fungicide resistance. This holds for the use of mixing partner fungicides that have either multi-site or single-site modes of action. The resulting predicted increase in the effective life of the at-risk fungicide can be large enough to be of practical relevance. The more effective the mixing partner (due to inherent activity and/or dose), the larger the reduction in selection and the larger the increase in effective life of the at-risk fungicide. 2. Adding a mixing partner while lowering the dose of the at-risk fungicide reduces the selection for fungicide resistance, without compromising effective disease control. The very few studies existing suggest that the reduction in selection is more sensitive to lowering the dose of the at-risk fungicide than to increasing the dose of the mixing partner. 3. Although there are very few studies, the existing evidence suggests that mixing two at-risk fungicides is also a useful resistance management tactic. The aspects that have received too little attention to draw generic conclusions about the effectiveness of fungicide mixtures as resistance management strategies are as follows: (i) the relative effect of the dose of the two mixing partners on selection for fungicide resistance, (ii) the effect of mixing on the effective life of a fungicide (the time from introduction of the fungicide mode of action to the time point where the fungicide can no longer maintain effective disease control), (iii) polygenically determined resistance, (iv) mixtures of two at-risk fungicides, (v) the emergence phase of resistance evolution and the effects of mixtures during this phase, and (vi) monocyclic diseases and nonfoliar diseases. The lack of studies on these aspects of mixture use of fungicides should be a warning against overinterpreting the findings in this review.
A Secreted Protein with Plant-Specific Cysteine-Rich Motif Functions as a Mannose-Binding Lectin That Exhibits Antifungal Activity
Authors: Miyakawa Takuya , Hatano Ken-ichi , Miyauchi Yumiko , Suwa You-ichi , Sawano Yoriko , Tanokura Masaru 
Published: August 2014

AbstractPlants have a variety of mechanisms for defending against plant pathogens and tolerating environmental stresses such as drought and high salinity. Ginkbilobin2 (Gnk2) is a seed storage protein in gymnosperm that possesses antifungal activity and a plant-specific cysteine-rich motif (domain of unknown function26 [DUF26]). The Gnk2-homologous sequence is also observed in an extracellular region of cysteine-rich repeat receptor-like kinases that function in response to biotic and abiotic stresses. Here, we report the lectin-like molecular function of Gnk2 and the structural basis of its monosaccharide recognition. Nuclear magnetic resonance experiments showed that mannan was the only yeast (Saccharomyces cerevisiae) cell wall polysaccharide that interacted with Gnk2. Gnk2 also interacted with mannose, a building block of mannan, with a specificity that was similar to those of mannose-binding legume lectins, by strictly recognizing the configuration of the hydroxy group at the C4 position of the monosaccharide. The crystal structure of Gnk2 in complex with mannose revealed that three residues (asparagine-11, arginine-93, and glutamate-104) recognized mannose by hydrogen bonds, which defined the carbohydrate-binding specificity. These interactions were directly related to the ability of Gnk2 to inhibit the growth of fungi, including the plant pathogenic Fusarium spp., which were disrupted by mutation of arginine-93 or the presence of yeast mannan in the assay system. In addition, Gnk2 did not inhibit the growth of a yeast mutant strain lacking the α1,2-linked mannose moiety. These results provide insights into the molecular basis of the DUF26 protein family.
Understanding the rise of African business
Authors: Tvedten Kaja , Wendelboe Hansen Michael , Jeppesen Søren 
Published: August 2014

Purpose– In light of recent enthusiasm over African private sector development, the purpose of this paper is to review the business literature on African enterprise development with a view of identifying lacunas in the literature and of developing an analytical framework that may guide future research on this issue.Design/methodology/approach– The paper provides a review of the extant literature on African enterprise development by juxtaposing the traditional pessimistic view of African business performance with more recent, optimistic accounts. Based on the literature review, lacunas in the literature are identified and an integrative framework for analysing African enterprise development is developed. The framework is used to provide an overview of the received literature on African enterprise development, to identify voids and lacunas and to identify new research agendas.Findings– While a growing number of studies suggest profound improvements in the performance of African enterprises, data limitations, conceptual ambiguities and absence of comprehensive studies still cautions against sweeping generalizations. The paper reviews the literature on factors shaping the performance of African enterprises, observing that while much research is focusing on the role of the African business environments for enterprise development, much less attention has been devoted to the role of firm-specific capabilities, strategies and management. The paper concludes by advocating a contingency approach to research on African enterprise development that emphasizes the interplay between firm-specific factors and the specificities of the African business environment.Originality/value– The paper provides a comprehensive literature review on African enterprise development and presents a novel framework for understanding African enterprise development from a business perspective.
The impact of the GST on mortgage pricing of Australian credit unions
Authors: Liu Benjamin , Huang Allen , Freudenberg Brett 
Published: August 2014

Purpose– The purpose of this paper is to investigate the impact of the Goods and Services Tax (GST) on mortgage pricing and to measure the GST shifting ratio of Australian credit unions.Design/methodology/approach– Using the proprietary data from 79 credit unions in Australia, we perform multivariate regression analysis on the effect of the GST on mortgage effective yield spreads and interest margins, respectively. We also introduce a model that is used to measure the GST shifting ratio.Findings– We document that the introduction of the GST in July 2000 led to the substantial rise in mortgage costs charged by credit unions in the post-GST periods. Overall, the GST alone contributed to the increase of effective yield spreads and interest margin by 65.3 and 70.1 basis points, respectively. As measured by the GST-shifting ratio, credit unions passed more than twice of the GST rate. This suggests GST over-shifting, and it is generally consistent with tax over-shifting literature.Originality/value– This is the first time the GST shifting ratio has been robustly measured with the use of multivariate models on mortgage costs.
Assessing the risk of non-compliance in UK organic agriculture
Authors: Zanoli Raffaele , Gambelli Danilo , Solfanelli Francesco , Padel Susanne 
Published: August 2014

Purpose
– The purpose of this paper is to provide an analysis of the risk factors influencing non-compliance in UK organic farming.

Design/methodology/approach
– The paper uses a formal econometric model of risk analysis to provide empirical evidence on the determinants of non-compliance in organic farming. A panel of data from the archives of the largest control body in the UK for 2007-2009 is used, and specific analyses are performed for two types of non-compliances. A zero inflated count data model is used for the estimation, taking into account the fact that the occurrences of non-compliance are very sparse.

Findings
– Results show the existence of strong co-dependence of non-compliant behaviours (i.e. the occurrence of major and critical non-compliance increases the probability of occurrence of the minor one; similarly the probability of occurrence of major non-compliance increases when minor non-compliance occur). Besides, livestock production and farm size are relevant risk factors.

Research limitations/implications
– Albeit highly representative, the findings are based on Soil Association data only and not on all UK organic farms.

Practical implications
– The paper provides practical indications for control bodies, concerning aspects that could be strengthened for more efficient risk-based inspections. The paper advocates the use of financial information like turnover or capital stock, and of data concerning the characteristics of the farmers, that could substantially improve the probability of detecting the most severe non-compliances.

Social implications
– Certification is essential for organic farming, and an improvement of inspection procedures through a risk-based approach could add efficiency and effectiveness to the whole organic food system, with obvious advantages for consumers and the society as a whole.

Originality/value
– This paper provides for the first time empirical evidence concerning the implementation of the organic certification system in the UK.