bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structural and electronic effects in metallocene catalysts studied by x‐ray techniques
Authors: Silveira Fernando , de Sá Denise Santos , da Rocha Zênis Novais , do Carmo Martins Alves Maria , dos Santos João Henrique Zimnoch 
Published: September 2008

AbstractA series of metallocenes, namely, [Cp2ZrCl2], [(MeCp)2ZrCl2], [(nBuCp)2ZrCl2], [(iBuCp)2ZrCl2], [(tBuCp)2ZrCl2], [Et(Ind)2ZrCl2], [Et(IndH4)2ZrCl2], and [MeSi2(Ind)2ZrCl2)] were analyzed by extended x‐ray absorption fine structure (EXAFS) and x‐ray photoelectron spectroscopy (XPS). Complementary techniques, UV–vis spectroscopy and cyclic and differential pulse voltammetry, were employed to characterize the organometallic complexes. The catalysts were evaluated in ethylene polymerization, having methylaluminoxane (MAO) as the cocatalyst, and the resulting polymers were characterized by gel permeation chromatography. The structural and electronic effects caused by the coordination sphere around the metal center and their effects on the catalytic activity and polymer characteristics are discussed. Copyright © 2008 John Wiley & Sons, Ltd.
Origin of Capacity Fading in Nano-Sized Co3O4Electrodes: Electrochemical Impedance Spectroscopy Study
Authors: Kang Jin-Gu , Ko Young-Dae , Park Jae-Gwan , Kim Dong-Wan 
Published: September 2008

Abstract
Transition metal oxides have been suggested as innovative, high-energy electrode materials for lithium-ion batteries because their electrochemical conversion reactions can transfer two to six electrons. However, nano-sized transition metal oxides, especially Co3O4, exhibit drastic capacity decay during discharge/charge cycling, which hinders their practical use in lithium-ion batteries. Herein, we prepared nano-sized Co3O4with high crystallinity using a simple citrate-gel method and used electrochemical impedance spectroscopy method to examine the origin for the drastic capacity fading observed in the nano-sized Co3O4anode system. During cycling, AC impedance responses were collected at the first discharged state and at every subsequent tenth discharged state until the 100th cycle. By examining the separable relaxation time of each electrochemical reaction and the goodness-of-fit results, a direct relation between the charge transfer process and cycling performance was clearly observed.
Tibial tuberosity fractures in adolescents
Authors: Frey Steven , Hosalkar Harish , Cameron Danielle B. , Heath Aaron , David Horn B. , Ganley Theodore J. 
Published: September 2008

Background Tibial tuberosity fractures in adolescents are uncommon. We retrospectively reviewed all tibial tuberosity fractures in adolescents (10–19) who presented to our level 1 pediatric trauma center over a 7-year period to review fracture morphology, mechanism of injury, fracture management including return to play, as well as complications. Additionally, we present a review of the literature and treatment algorithm. Methods We reviewed the clinical charts and radiographs of consecutive patients with tibial tuberosity fractures between 01 January 2000 and 01 January 2007. Data parameters included the following: patients age and gender, involved side, injury classification, co-morbidities, mechanism of injury, treatment, return to activity and complications. Data were extracted and reviewed, and a treatment algorithm is proposed with some additional insights into the epidemiology of the injury. Nineteen patients met the inclusion criteria. Results There were 19 patients with 20 tibial tuberosity fractures. The mean age was 13.7 years. There were 18 males and 1 female patient. There were nine left-sided injuries and eleven right-sided including one patient with bilateral fractures. Mechanism of injuries included basketball injury (8), running injury (5), football injury (3), fall from a scooter (2), high jump (1) and fall (1). Co-morbidities included three patients with concurrent Osgood–Schlatter disease and one with osteogenesis imperfecta. All were treated with ORIF, including arthroscopic-assisted techniques in two cases. Complications included four patients with pre-operative presentation of compartment syndrome all requiring fasciotomy, one post-operative stiffness and one painful hardware requiring removal. Range of motion was started an average of 4.3 weeks post-operatively and return to play was an average of 3.9 months post-operatively. Conclusion Although uncommon, tibial tuberosity fractures in adolescents are clinically important injuries. Early recognition and treatment (closed or open as appropriate) gives good results. All the patients in our series had surgical fixation as per different indications that have been elaborated. It is important for clinicians to recognize that compartment syndrome remains a significant concern post-injury and in the perioperative period. Close monitoring and timely intervention is recommended. A simple treatment algorithm is presented for clinicians to help manage these injuries.
Sexual violence‐related fistulas in the Democratic Republic of Congo
Authors: Onsrud Mathias , Sjøveian Solbjørg , Luhiriri Roger , Mukwege Dennis 
Published: September 2008

AbstractObjectiveTo determine the magnitude of traumatic gynecologic fistulas caused by sexual violence in the Democratic Republic of Congo.MethodsA retrospective analysis of hospital records from 604 consecutive patients who received treatment for gynecologic fistulas at Panzi Hospital between November 2005 and November 2007.ResultsOf the 604 patients, 24 (4%) reported that their fistulas had been caused by sexual violence; of these, 5 (0.8%) had developed fistulas as a direct result of forced penetration with foreign objects and/or gang rapes. Of the remaining patients, 6 had a fistula before they were raped, 9 developed iatrogenic fistulas following inappropriate instrumentation to manage rape‐induced spontaneous abortion or stillbirth, or after abdominal hysterectomy, and 4 developed fistulas after prolonged and obstructed labor.ConclusionTraumatic fistulas are rare compared to obstetric fistulas. Fistulas indirectly related to sexual violence are likely to be more common than those directly related. All fistulas resulting from sexual violence, whether direct or indirect, should be considered traumatic and special care should be given to these women.
‘THESE LAWS SHOULD BE MADE BY US’: CUSTOMARY MARRIAGE LAW, CODIFICATION AND POLITICAL AUTHORITY IN TWENTIETH-CENTURY COLONIAL GABON
Authors: JEAN-BAPTISTE RACHEL 
Published: September 2008

ABSTRACTThis article analyzes the multiple and failed efforts to codify customary marriage law over the course of the twentieth century in colonial Gabon. It argues that these efforts illuminate the discursive arenas in which the colonial state, the church and African political leaders struggled to demarcate power and control over wealth-in-women. In a time of sociopolitical crisis and change state, chiefs and other elite African men all become involved in attempts to conceptualize, codify and administer customary marriage law. The contested process of codification reveals disjunctures in the articulation of male political authority in colonial Gabon.
NETWORKS OF KNOWLEDGE: CLANSHIP AND COLLECTIVE WELL-BEING IN BUGANDA
Authors: KODESH NEIL 
Published: September 2008

ABSTRACTThis article raises the question of how scholars might make sense of well-known components of social organization in Africa in the absence of the increasingly criticized evolutionary and lineage models that once gave them meaning. In an effort to understand why our earliest glimpses into the distant Ganda past appear in the form of clan histories, the article examines the relationship between clanship, public healing and transformations in agricultural practices. Beginning around the fifteenth and sixteenth centuries, Ganda expanded upon earlier knowledge of banana cultivation to develop a land-intensive banana farming system. This process coincided with the transformation of previously territorial spirits into portable spirits capable of ensuring the health of disconnected groups of people. At the heart of these undertakings stood the ideology and practices of clanship, which furnished the conceptual bridge connecting transformations in agriculture and public healing. The webs of shrines situated on discontiguous clan lands created therapeutic networks that drew together communities whose leaders possessed a variety of skills, thus forging a powerful connection between clanship, collective health and the composition of knowledge.
‘TO NEVER SHED BLOOD’: YACOUBA SYLLA, FÉLIX HOUPHOUËT-BOIGNY AND ISLAMIC MODERNIZATION IN CÔTE D'IVOIRE
Authors: HANRETTA SEAN 
Published: September 2008

ABSTRACTAfter an ill-fated religious revival, the Sufi teacher Yacouba Sylla and his followers became wealthy and politically influential in post-Second World War Côte d'Ivoire. They argued for an understanding of democratization and development that defined both ideas in terms of their community's own mystical experiences and world-historical significance, rather than in terms of modernity. As a way of making sense of their own past and defending their place in an increasingly tense political environment, these efforts achieved their most explicit articulation in a powerful story about Yacouba Sylla's refusal of a gift from Ivoirian President Félix Houphouët-Boigny.
HISTORY, MEMORY AND THE LEGACY OF SAMORI IN SOUTHERN MALI, c. 1880–1898
Authors: PETERSON BRIAN J. 
Published: September 2008

ABSTRACTThis article seeks to situate local oral traditions on Samori Touré within the contexts of both internal African empire building and French colonial conquest. It takes into account the experiences of the vanquished on the periphery of Samori's empire in an effort to reassess his legacy. It argues that local traditions not only provide a corrective to the nationalist historiography on Samori, they also complicate the notion of ‘resistance’ by demonstrating internal dissent and even rebellion against Samorian rule at a time of Samori's vaunted ‘primary resistance’ to French conquest. Finally, this article concludes by providing a contemporary reading of the southern Malian historical landscape, rooting local Samorian history and politics in particular ‘sites of memory’.
POSSIBILITY AND CONSTRAINT: AFRICAN INDEPENDENCE IN HISTORICAL PERSPECTIVE
Authors: COOPER FREDERICK 
Published: September 2008

ABSTRACTOn the fiftieth anniversary of an ambiguous event – the referendum giving French Africans the choice of immediate independence or a new status within a ‘French Community’ – this article points to the alternative forms of political action which opened up at certain moments in African history and how, at other moments, some of those alternatives closed down. It assesses concepts, issues and arguments used in writing the history of Africa, now that the recent African past – spanning the last years of colonial rule and the years of independence – is becoming a focus of historical inquiry.
Magnitude and contributory factors of postnatal depression: a community-based cohort study from a rural subdistrict of Bangladesh
Authors: Gausia K. , Fisher C. , Ali M. , Oosthuizen J. 
Published: September 2008

BackgroundRecent evidence suggests that the prevalence of postnatal depression (PND) is highest in low-income developing countries. This study aimed to estimate the prevalence of PND and its associated risk factors among Bangladeshi women.MethodThe study was conducted in the Matlab subdistrict of rural Bangladesh. A cohort of 346 women was followed up from late pregnancy to post-partum. Sociodemographic and other related information on risk factors was collected on structured questionnaires by trained interviewers at 34–35 weeks of pregnancy at the woman's home. A validated local language (Bangla) version of the Edinburgh Postnatal Depression Scale (EPDS-B) was used to measure depression status at 34–35 weeks of pregnancy and at 6–8 weeks after delivery.ResultsThe prevalence of PND was 22% [95% confidence interval (CI) 17.7–26.7%] at 6–8 weeks post-partum. After adjustment in a multivariate logistic model, PND could be predicted by history of past mental illness [odds ratio (OR) 5.6, 95% CI 1.1–27.3], depression in current pregnancy (OR 6.0, 95% CI 3.0–12.0), perinatal death (OR 14.1, 95% CI 2.5–78.0), poor relationship with mother-in-law (OR 3.6, 95% CI 1.1–11.8) and either the husband or the wife leaving home after a domestic quarrel (OR 4.0, 95% CI 1.6–10.2).ConclusionsThe high prevalence of PND in the study was similar to other countries in the South Asian region. The study findings highlight the need for programme managers and policy makers to allocate resources and develop strategies to address PND in Bangladesh.
Bacterial flagellar motor
Authors: Sowa Yoshiyuki , Berry Richard M. 
Published: September 2008

AbstractThe bacterial flagellar motor is a reversible rotary nano-machine, about 45 nm in diameter, embedded in the bacterial cell envelope. It is powered by the flux of H+or Na+ions across the cytoplasmic membrane driven by an electrochemical gradient, the proton-motive force or the sodium-motive force. Each motor rotates a helical filament at several hundreds of revolutions per second (hertz). In many species, the motor switches direction stochastically, with the switching rates controlled by a network of sensory and signalling proteins. The bacterial flagellar motor was confirmed as a rotary motor in the early 1970s, the first direct observation of the function of a single molecular motor. However, because of the large size and complexity of the motor, much remains to be discovered, in particular, the structural details of the torque-generating mechanism. This review outlines what has been learned about the structure and function of the motor using a combination of genetics, single-molecule and biophysical techniques, with a focus on recent results and single-molecule techniques.
Protein–protein interaction and quaternary structure
Authors: Janin Joël , Bahadur Ranjit P. , Chakrabarti Pinak 
Published: September 2008

AbstractProtein–protein recognition plays an essential role in structure and function. Specific non-covalent interactions stabilize the structure of macromolecular assemblies, exemplified in this review by oligomeric proteins and the capsids of icosahedral viruses. They also allow proteins to form complexes that have a very wide range of stability and lifetimes and are involved in all cellular processes. We present some of the structure-based computational methods that have been developed to characterize the quaternary structure of oligomeric proteins and other molecular assemblies and analyze the properties of the interfaces between the subunits. We compare the size, the chemical and amino acid compositions and the atomic packing of the subunit interfaces of protein–protein complexes, oligomeric proteins, viral capsids and protein–nucleic acid complexes. These biologically significant interfaces are generally close-packed, whereas the non-specific interfaces between molecules in protein crystals are loosely packed, an observation that gives a structural basis to specific recognition. A distinction is made within each interface between a core that contains buried atoms and a solvent accessible rim. The core and the rim differ in their amino acid composition and their conservation in evolution, and the distinction helps correlating the structural data with the results of site-directed mutagenesis andin vitrostudies of self-assembly.
Seabirds as indicators of the marine environment
Authors: Parsons Matt , Mitchell Ian , Butler Adam , Ratcliffe Norman , Frederiksen Morten , Foster Simon , Reid James B. 
Published: September 2008

Abstract
Parsons, M., Mitchell, I., Butler, A., Ratcliffe, N., Frederiksen, M., Foster, S., and Reid, J. B. 2008. Seabirds as indicators of the marine environment. – ICES Journal of Marine Science, 65: 1520–1526. We report on the development of seabird indicators that support the Scottish Biodiversity Strategy. The application of high-quality monitoring data on breeding abundance and productivity in Scotland was explored in three ways: as indicators of seabird status in its own right, as indicators of the “health” of the marine environment, and as indicators of the food supply of vertebrate predators. Data on breeding productivity of seabirds, which responds more immediately to environmental variation than adult abundance, provided a novel supplement to indicators based solely on abundance trends. Grouping of species according to ecological guilds provided indicators of change in particular aspects of the marine environment. The role of seabird indicators in relation to policy frameworks is discussed, with a look to further developments at the UK and regional scales.
Quality indicators for the prevention and management of cardiovascular disease in primary care in nine European countries
Authors: Campbell Stephen M. , Ludt Sabine , Lieshout Jan Van , Boffin Nicole , Wensing Michel , Petek Davorina , Grol Richard , Roland Martin O. 
Published: September 2008

Background With free movement of labour in Europe, European guidelines on cardiovascular care and the enlargement of the European Union to include countries with disparate health care systems, it is important to develop common quality standards for cardiovascular prevention and risk management across Europe. Methods Panels from nine European countries (Austria, Belgium, Finland, France, Germany, Netherlands, Slovenia, United Kingdom and Switzerland) developed quality indicators for the prevention and management of cardiovascular disease in primary care. A two-stage modified Delphi process was used to identify indicators that were judged valid for necessary care. Results Forty-four out of 202 indicators (22%) were rated as valid. These focused predominantly on secondary prevention and management of established cardiovascular disease and diabetes. Less agreement on indicators of preventive care or on indicators for the management of hypertension and hypercholesterolemia in patients without established disease was observed. Although 85% of the 202 potential indicators assessed were rated valid by at least one panel, lack of consensus among panels meant that the set that could be agreed upon among all panels was much smaller. Conclusion Indicators for the management of established cardiovascular disease have been developed, which can be used to measure the quality of cardiovascular care across a wide range of countries. Less agreement on how the quality of preventive care should be assessed was observed, probably caused by differences in health systems, culture and attitudes to prevention.
Is the MacNew quality of life questionnaire a useful diagnostic and evaluation instrument for cardiac rehabilitation?
Authors: Maes Stan , De Gucht Véronique , Goud Rick , Hellemans Irene , Peek Niels 
Published: September 2008

Purpose The MacNew health-related quality of life questionnaire is internationally used as a standard for psychosocial assessment in many cardiac rehabilitation centres. This study investigates its discriminating capacity between diagnostic disease categories, sex and age at entry (T1) and at the end (T2) of cardiac rehabilitation as well as the responsiveness of the MacNew during this period. Method Data were used from 6749 cardiac rehabilitation patients at T1 and 1654 at T2. Results Results show that the global MacNew as well as the three (physical, emotional, social) subscales have high internal consistencies, and differentiate well and in the expected direction at T1 between diagnostic groups (heart surgery, myocardial infarction with and without percutaneous coronary intervention, stable angina with and without percutaneous coronary intervention, implantable cardioverter defibrillator, and heart failure patients), sex and age. The MacNew also proves to be an adequate evaluation instrument for cardiac rehabilitation, as all scales are responsive enough to capture changes from T1 to T2. At T2, however, the MacNew seems to lose some of its discriminating power, partly because of ceiling effects. Conclusion It is suggested to complement the use of the MacNew both at T1 and T2 with a brief anxiety and depression measure, which is valid and responsive for different groups of cardiac rehabilitation patients.
Lipid-lowering treatment for all could substantially reduce the burden of macrovascular complications of diabetes patients in the Netherlands
Authors: Jacobs-van der Bruggen Monique A.M. , Engelfriet Peter M. , Hoogenveen Rudolf T. , van Baal Pieter H.M. , Struijs Jeroen N. , Verschuren Wilhelmina M.M. , Smit Henriette A. , Baan Caroline A. 
Published: September 2008

Background We aimed to quantify the potential health benefits of increased use of lipid-lowering treatment (LLT), according to current guidelines, for the Dutch diabetes population. Design Simulation study. Methods We compared the long-term health outcomes for a scenario in which all diabetes patients received LLT to those in a ‘current practice’ scenario, in which 28% received LLT. The model reflected the Dutch diabetes population 40–80 years of age, in 2003. Sensitivity analyses were performed, using more conservative assumptions. Results Over the lifetime, LLT for all diabetes patients reduced the expected cumulative incidences of coronary heart disease (CHD) and stroke by, respectively, 6 and 9%. Average life expectancy of Dutch diabetes patients would increase by 0.33 years, ranging from 0.14 years for patients aged 70–79 years, to 0.84 years for patients aged 40–49 years at the start of the simulation. Life-long treatment for patients aged 50–59 contributed most to the life years gained (55 000 out of 146 000). With reduced effectiveness of LLT and fewer patients starting LLT, the cumulative incidences of both CHD and stroke would decrease by approximately 2%. The number needed to treat to prevent one incident case of cardiovascular disease over lifetime was 20 for CHD and 44 for stroke. Conclusion This simulation study shows that increased use of LLT can substantially reduce the expected future burden of CHD and stroke in the Dutch diabetes population.
Interaction between income and education in predicting long-term survival after acute myocardial infarction
Authors: Gerber Yariv , Goldbourt Uri , Drory Yaacov ,   for the Israel Study Group on First Acute Myocardial Infarction
Published: September 2008

Background Population-based data on the impact of socioeconomic status (SES) on long-term survival after myocardial infarction (Ml) are lacking. We evaluated the association of income and education with all-cause mortality and cardiac mortality post-MI and assessed income-by-education interaction. Design Prospective cohort study. Methods Between February 1992 and February 1993, 1521 consecutive patients aged 65 years or less (19% women) discharged from all hospitals in central Israel after incident acute MI were enrolled and followed up through December 2005. Data on SES indicators, cardiovascular risk factors, MI characteristics and severity, comorbidities, and acute treatment were assessed at baseline. Results Low SES, as defined by income and education, was associated with older age, female sex, and higher prevalence of risk factors and comorbidities. Further, low SES patients presented with more severe disease and received fewer cardiac procedures and medications. During follow-up, 427 patients died. Income and education strongly interacted ( P = 0.003). The hazard ratio for death associated with income (below average vs. average/above average) was considerably higher for less educated (≤12 years) patients [2.64, 95% confidence interval (CI): 1.92–3.63] than for more educated (≥12 years) patients (1.53, 95% CI: 1.02–2.29). Adjustment for various prognostic indicators attenuated these estimates, yet excess risk persisted for the less educated group (hazard ratio = 1.58, 95% CI: 1.13–2.21). Similar patterns were noted for cardiac mortality. Conclusion Among patients with incident MI, low SES is related to higher risk profile and poorer treatment. Low income is associated with a large increase in mortality risk when accompanied by low education, suggesting a double jeopardy phenomenon.