bluuebunny/crossref_metadata_2025_split huggingface dataset:
Complexation of Surfactant/β‐Cyclodextrin to Inhibit Surfactant Adsorption onto Sand, Kaolin, and Shale for Applications in Enhanced Oil Recovery Processes. Part II: Dynamic Adsorption Analysis
Authors: Kittisrisawai Sirinthip , Romero‐Zerón Laura Beatriz 
Published: June 2015

AbstractSurfactant adsorption onto solid surfaces is problematic in some industrial processes, such as in surfactant flooding for enhanced oil recovery. In this work, it was hypothesized that the use of a surfactant delivery system could prevent surfactant adsorption onto solid surfaces. Therefore, the encapsulation of sodium dodecyl sulfate (SDS) into the hydrophobic core of β‐cyclodextrin (β‐CD) to generate a surfactant delivery system (SDS/β‐CD) was evaluated in this work. This complexation was characterized using optical and scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT‐IR). Dynamic adsorption evaluation was applied to determine the effectiveness of the complexation in inhibiting surfactant adsorption onto a variety of solid adsorbents including sand, and mixtures of sand–kaolin and sand–shale. Surfactant adsorption was also evaluated applying the quartz crystal microbalance technology (QCM‐D). The formation and morphology of the complexation was confirmed by optical microscopy, SEM, and FT‐IR. Dynamic adsorption tests demonstrated the effectiveness of the surfactant delivery approach in preventing the adsorption of surfactant (up to 74 % adsorption reduction). The QCM‐D technology confirmed these observations. Several mechanisms were proposed to explain the inhibition of surfactant adsorption including steric hindrance, self‐association of inclusion complexes, hydrophilicity increase, and disruption of hemimicelles formation.
Dega osteotomy for the management of developmental dysplasia of the hip in children aged 2–8 years: Results of 58 consecutive osteotomies after 13–25 years of follow-up
Authors: El-Sayed Mohamed M. H. , Hegazy Mohamed , Abdelatif Nasef M. , ElGebeily Mohamed A. , ElSobky Tamer , Nader Sean 
Published: June 2015

Purpose Developmental dysplasia of the hip (DDH) is a term used to cover a broad spectrum of anomalies ranging from mild dysplasia to high-riding dislocations. We report the management of DDH in children using the Dega osteotomy and their long-term follow-up. Methods Fifty-eight hips from 48 children younger than 8 years treated using the Dega osteotomy between January 1988 and October 2000 were included in this multcenter study. Both prospective (41 hips) and retrospective (17 hips) cases were included, and follow-up was for a minimum of 13 years. Radiographs were made preoperatively, immediately postoperatively, after 6 weeks or at removal of the spica cast if any, at 6-month intervals and/or as indicated for 3 years postoperatively and then on annual basis until the last follow-up. A single-cut computed tomographic scan was performed for all prospective patients. Special attention was paid to the predictive measures of hip arthrosis and the survival of the hip after Dega osteotomy. Results The final clinical outcome was favorable in 44 hips (75.9 %). Eleven hips needed a second surgery (acetabuloplasty and/or arthroplasty) during the follow-up period. Conclusions In our pediatric patient population the Dega osteotomy proved to be an adequate measure for the management of this complex condition. The worst complication was avascular necrosis, and all of the affected hips ended with failure (pain, another surgery, or both).
Predictive factors of successful sperm retrieval on microdissection testicular sperm extraction in Japanese men
Authors: Enatsu Noritoshi , Miyake Hideaki , Chiba Koji , Fujisawa Masato 
Published: June 2015

AbstractPurposeTo evaluate retrospectively the outcomes of microdissection testicular sperm extraction (micro‐TESE) in men with nonobstructive azoospermia (NOA) and to identify the parameters predicting successful sperm retrieval in this cohort of patients.MethodsAfter excluding patients with normal testicular volume and serum follicle‐stimulating hormone (FSH) level who received conventional TESE, this study included 329 consecutive NOA patients undergoing micro‐TESE at our institution. The significance of several factors, including age, testicular volume, etiology and serum levels of FSH, luteinizing hormone (LH) and serum testosterone (T), as predictors of successful sperm retrieval, was evaluated.ResultsOf the 329 men included in this series, 246 (74.8 %), 40 (12.2 %), and 43 (13.1 %) were pathologically diagnosed with Sertoli cell only, maturation arrest, and hypospermatogenesis, respectively. Spermatozoa were retrieved in 97 (29.5 %) of these 329 men by micro‐TESE. Older age and non‐idiopathic etiology were significantly associated with the probability of successful sperm retrieval; however, there were no significant effects of testicular volume as well as serum levels of FSH, LH, and T on sperm retrieval outcome. Furthermore, Johnsen score of the micro‐TESE specimen showed a significant association with whether spermatozoa were successfully retrieved. Univariate analysis of preoperative parameters identified older age and non‐idiopathic etiology as significant predictors of successful sperm retrieval, of which only etiology appeared to be independently related to successful sperm retrieval on multivariate analysis.ConclusionsSpermatozoa are significantly less likely to be successfully retrieved by micro‐TESE in men with idiopathic azoospermia.
Comparison of management and outcomes of ED patients with acute decompensated heart failure between the Canadian and United States’ settings
Authors: Lai Anita , Tenpenny Elliott , Nestler David , Hess Erik , Stiell Ian G. 
Published: June 2015

AbstractIntroductionThe objective of this study was to compare the emergency department (ED) management and rate of admission of acute decompensated heart failure (ADHF) between two hospitals in Canada and the United States and to compare the outcomes of these patients.MethodsThis was a health records review of adults presenting with ADHF to two EDs in Canada and the United States between January 1 and April 30, 2010. Outcome measures were admission to the hospital, myocardial infarction (MI), and death or relapse rates to the ED. Data were analysed using descriptive, univariate and multivariate analyses.ResultsIn total, 394 cases were reviewed and 73 were excluded. Comparing 156 Canadian to 165 U.S. patients, respectively, mean age was 76.0 and 75.8 years; male sex was 54.5% and 52.1%. Canadian and U.S. ED treatments were noninvasive ventilation 7.7% v. 12.8% (p=0.13); IV diuretics 77.6% v. 36.0% (p<0.001); IV nitrates 4.5% v. 6.7% (p=0.39). There were significant differences in rate of admission (50.6% v. 95.2%, p<0.001) and length of stay in ED (6.7 v. 3.0 hours, p<0.001). Proportion of Canadian and U.S. patients who died within 30 days of the ED visit was 5.1% v. 9.7% (p=0.12); relapsed to the ED within 30 days was 20.8% v. 17.5% (p=0.5); and had MI within 30 days was 2.0% v. 1.9% (p=1.0).ConclusionsThe U.S. and Canadian centres saw ADHF patients with similar characteristics. Although the U.S. site had almost double the admission rate, the outcomes were similar between the sites, which question the necessity of routine admission for patients with ADHF.
Leadership During the Boston Marathon Bombings: A Qualitative After-Action Review
Authors: Goralnick Eric , Halpern Pinchas , Loo Stephanie , Gates Jonathan , Biddinger Paul , Fisher John , Velmahos George , Chung Sarita , Mooney David , Brown Calvin , Barnewolt Brien , Burke Peter , Gupta Alok , Ulrich Andrew , Hojman Horacio , McNulty Eric , Dorn Barry , Marcus Leonard , Peleg Kobi 
Published: June 2015

AbstractObjectiveOn April 15, 2013, two improvised explosive devices (IEDs) exploded at the Boston Marathon and 264 patients were treated at 26 hospitals in the aftermath. Despite the extent of injuries sustained by victims, there was no subsequent mortality for those treated in hospitals. Leadership decisions and actions in major trauma centers were a critical factor in this response.MethodsThe objective of this investigation was to describe and characterize organizational dynamics and leadership themes immediately after the bombings by utilizing a novel structured sequential qualitative approach consisting of a focus group followed by subsequent detailed interviews and combined expert analysis.ResultsAcross physician leaders representing 7 hospitals, several leadership and management themes emerged from our analysis: communications and volunteer surges, flexibility, the challenge of technology, and command versus collaboration.ConclusionsDisasters provide a distinctive context in which to study the robustness and resilience of response systems. Therefore, in the aftermath of a large-scale crisis, every effort should be invested in forming a coalition and collecting critical lessons so they can be shared and incorporated into best practices and preparations. Novel communication strategies, flexible leadership structures, and improved information systems will be necessary to reduce morbidity and mortality during future events. (Disaster Med Public Health Preparedness. 2015;9:489–495)
Microbiologic Surveillance of Duodenoscope Reprocessing at the Vienna University Hospital From November 2004 Through March 2015
Authors: Paula Helga , Presterl Elisabeth , Tribl Barbara , Diab-Elschahawi Magda 
Published: June 2015

Bacterial contamination of duodenoscopes is attributed to difficulties with reprocessing the Albarran lever. Routine microbiologic surveillance data of endoscopes with Albarran lever retrospectively collected from November 2004 through March 2015 revealed no growth of microorganism at this specific site. Transmission of endoscope-associated infection is avoidable by following validated reprocessing procedures.Infect Control Hosp Epidemiol 2015;36(10):1233–1235
Against Negation: Suicide, Self-Consciousness, and Jibanananda Das’s Poem, “One Day Eight Years Ago”
Authors: Ray Manas 
Published: June 2015

AbstractJibanananda Das (1899–1954) is widely revered as the preeminent poet of post-Tagore Bengali literature. His oeuvre is unremittingly autobiographical, narrating desultory journeys into a vulnerable yet stoic, companionless life. The poem that the paper analyses is one of his most well known. Two streaks of narrative run parallel in the poem: the protagonist’s act of suicide without any apparent reason and the ceaseless brutality of nature as a way of life. The poem has occasioned a large body of critical literature. As against the prevalent interpretation of the poem, which privileges self-consciousness and a dialectical scheme of interpretation, we set off a Foucauldian, archeo-genealogical reading. In our reading, the poem is a theater of many voices constituting a matrix of language, which, strictly speaking, is a nonlanguage—articulations that perfectly fold back against one another to implicate in a tautological bind the originary meaninglessness of living and of life’s constitutive cruelty. Here negation is uncontainable and illimitable, always spilling over, always open to possibilities of being otherwise, its trail running in negating—almost inevitably—negation itself and thus gesturing an aleatory renewal of a space for the political.
SEQUENTIAL EFFECTS OF MINIMUM TILLAGE, SEED PRIMING, FERTILIZER MICRODOSING AND MULCHING IN MAIZE, SEMIARID CENTRAL RIFT VALLEY OF ETHIOPIA
Authors: SIME GETACHEW , AUNE JENS B. 
Published: June 2015

SUMMARYIntensification of maize production is imperative to improve food security for the rising population in the central rift valley (CRV) of Ethiopia, whose livelihood is principally based on rainfed maize that operates under shrinking landholding and high seasonal rainfall variability. This study examined different levels of intensification options in maize production by sequentially introducing minimum tillage and seed priming, phosphorus (P) fertilizer microdosing, surface mulching and nitrogen (N) fertilizer microdosing. Field experiments were conducted with five treatments, steps or levels consisting of conventional tillage (farmers practice as a control); minimum tillage + seed priming, unfertilized (step 1); step 1 + microdosing 53 kg ha−1 P (step 2); step 2 + 4 ton ha−1 maize stover as surface mulch (step 3) and step 3 + 53 kg ha−1 N (step 4). These steps represented increasing levels of intensification. Except at the lowest level (step 1), agronomic and economic responses improved with increasing levels of inputs. Relative to the very high and increasing gross margin, production costs were low but slowly increased with increasing levels of inputs. Except at the lowest level, the value cost ratio was above 4 even at the highest levels of inputs, demonstrating that such kind of intensification can be achieved with low risk. Likewise, the fertilizer use efficiency was quite high even at the highest of levels of inputs signifying the efficiency of the pocket application of fertilizer through the microdosing method. The improvement in maize establishment and yield and the reduction in the days to maturity could contribute to make maize production more adaptive to the existing seasonal rainfall variability. Depending on the affordability to the external inputs and their feasibilities, the different technology packages in the intensification ladder may give different choices for the farmers to improve maize production in the CRV of Ethiopia.
Effect of breed and pasture type on methane emissions from weaned lambs offered fresh forage
Authors: FRASER M. D. , FLEMING H. R. , THEOBALD V. J. , MOORBY J. M. 
Published: June 2015

SUMMARYTo investigate the extent to which enteric methane (CH4) emissions from growing lambs are explained by simple body weight and diet characteristics, a 2 × 2 Latin square changeover design experiment was carried out using two sheep breeds and two fresh pasture types. Weaned lambs of two contrasting breed types were used: Welsh Mountain (WM, a small, hardy hill breed) and Welsh Mule × Texel (TexX, prime lamb) (n = 8 per breed). The lambs were zero-grazed on material cut from recently reseeded perennial ryegrass and extensively managed permanent pasture. In each experimental period, individual ad libitum dry matter intake (DMI) was determined indoors following an adaptation period of 2 weeks, and CH4 emissions were measured individually in open-circuit respiration chambers over a period of 3 days. Although total daily CH4 emissions were lower for the WM lambs than for the TexX lambs (13·3 v. 15·7 g/day, respectively) when offered fresh forage, the yield of CH4 per unit DMI was similar for the two breed types (16·4 v. 17·7 g CH4/kg DMI). Total output of CH4 per day was higher when lambs were offered ryegrass compared with permanent pasture (16·1 v. 12·9 g/day, respectively), which was probably driven by differences in DMI (986 v. 732 g/day). Methane emissions per unit DMI (16·4 v. 17·7 g CH4/kg DMI) and proportion of gross energy intake excreted as CH4 (0·052 v. 0·056 MJ/MJ) were both higher on the permanent pasture. No forage × breed type interactions were identified. The results indicate that forage type had a greater impact than breed type on CH4 emissions from growing weaned lambs. It can be concluded that when calculating CH4 emissions for inventory purposes, it is more important to know what forages growing lambs are consuming than to know what breeds they are.
The regional connections of the 1728 Musin Rebellion (戊申亂)
Authors: Jackson Andrew David 
Published: June 2015

AbstractMany scholars have stressed that regional dynamics led to the outbreak of the Musin Rebellion, the largest rebellion in eighteenth-century Korea. Scholars have examined the economic and political situation leading up to the violence and concluded that political marginalization caused Kyŏngsang Province elites (from the Southerner faction) to launch the rebellion. This paper analyses evidence from official sources about rebel motivations, rebel geographical associations and the court view of the causes. Although post-rebellion government statements acknowledge tensions between the court and many Kyŏngsang Province elites, rebel testimony showed no evidence of any anger about discrimination against elites from a single region. There is also inconsistent evidence of regional concerns in the membership of the rebel organization, which was drawn from three southern provinces and mainly concentrated around the capital. My findings challenge the conclusions of regionalist scholars and place the Musin Rebellion in a trajectory of late Chosŏn rebellion that was attempting to redress factional political discrimination and was not caused by regional concerns.
Restrictive right ventricular performance assessed by cardiac magnetic resonance after balloon valvuloplasty of critical pulmonary valve stenosis
Authors: Massoud Ikram , Botros Nader , Yehia Atef , Abdelghafoor Hassan , Donya Mohamed , Samir Ahmd , Serag Heba , Mohamed Elham 
Published: June 2015

AbstractBackgroundLittle data are published about right ventricular diastolic performance in patients with critical pulmonary valve stenosis after balloon pulmonary valvuloplasty thus far.MethodsA total of 44 patients with isolated critical pulmonary valve stenosis who had undergone balloon valvuloplasty with haemodynamic recordings were enrolled to the study; 33 patients who came for follow-up underwent further imaging by echocardiography after 6 months and their right ventricular functional parameters were compared with 33 control patients of the same age and sex. Out of 33 patients, 21 underwent cardiac MRI with late gadolinium enhancement to assess the presence of right ventricular fibrosis.ResultsThe right ventricular systolic pressure (p<0.0001) and right ventricular outflow tract gradient (p<0.0001) decreased acutely (p<0.0001) after balloon valvuloplasty. During follow-up, M-mode left ventricular end diastolic dimension (p<0.001) and end systolic dimension increased (p<0.001), whereas right ventricular end diastolic dimension decreased (p<0.001). Compared with controls, patients (n=33) had significantly reduced tricuspid annular Ea and higher E/Ea (p<0.001). Right ventricular systolic dysfunction was also suggested by reduced tricuspid annular systolic velocity (p<0.001). Late gadolinium enhancement was demonstrated in 13 out of 21 patients with restrictive physiology, which involves the anterior right ventricular outflow tract, anterior wall, and inferior wall. The right ventricular late gadolinium enhancement score correlated positively with age (r=0.7, p<0.001) and right ventricular mass index (r=0.52, p<0.001).ConclusionThe persistence of right ventricular diastolic dysfunction after relief of chronic pressure overload of critical pulmonary valve stenosis suggests that a factor – other than increase in afterload – is involved in this physiology. Fibrosis is the most likely factor responsible for persistence of restrictive physiology as documented by late gadolinium enhancement.
Aortico-left ventricular tunnel and left ventricular non-compaction: a case series
Authors: Smith Brandon M. , Cochran Clinton D. , Owens Sonal T. 
Published: June 2015

AbstractAortico-left ventricular tunnel and left ventricular non-compaction are rare congenital cardiac anomalies with varied clinical presentations and sparsely described co-existence in the medical literature. Owing to the limited information about these diagnoses in tandem, we present four cases of aortico-left ventricular tunnel and left ventricular non-compaction from our institution and discuss the clinical presentation, management, and follow-up.
Acute myocardial infarction caused by embolisation of an intra-cardiac tumour
Authors: Mostafa Ashraf , Briasoulis Alexandros , Schreiber Theodore 
Published: June 2015

AbstractThis report describes a rare case of left main coronary artery occlusion caused by embolisation of an intra-cardiac tumour in an 11-year-old patient. The patient presented with severe chest pain with ST-segment depression in the inferolateral leads with evidence of decreased left ventricular function, anterior-apical hypokinesis, and a pedunculated mass attached to the mitral valve. An urgent cardiac catheterisation was performed, which revealed near-complete obstruction of the left anterior descending coronary artery. Transcatheter aspiration of the embolic material was successfully performed. The final pathological examination revealed an inflammatory myofibroblastic tumour, which is a rare benign tumour, characterised by the proliferation of myofibroblasts and inflammatory cell infiltration.
Breastfeeding practices and policies in WHO European Region Member States
Authors: Bagci Bosi Ayse Tulay , Eriksen Kamilla Gehrt , Sobko Tanja , Wijnhoven Trudy MA , Breda João 
Published: June 2015

AbstractObjectiveTo provide an update on current practices and policy development status concerning breastfeeding in the WHO European Region.DesignNational surveys and studies conducted by national health institutions were prioritized. Sub-national data were included where no national data or studies existed. Information on national breastfeeding policies was collected mainly from the WHO Seventh Meeting of Baby-Friendly Hospital Initiative Coordinators and European Union projects. Owing to the different data sources and methods, any comparisons between countries must be made with caution.SettingWHO European Member States.ResultsData from fifty-three WHO European Member States were investigated; however, a large proportion had not reported any data. Rates of early initiation of breastfeeding, exclusive breastfeeding and continued breastfeeding to 1 year all varied considerably within the WHO European Region. Exclusive breastfeeding rates declined considerably after 4 months, and were low in infants under 6 months and at 6 months of age. The majority of the countries with existing data reported having a national infant and young child feeding policy and the establishment of a national committee on breastfeeding or infant and young child feeding. The majority of the countries with existing data reported having baby-friendly hospitals, although the proportion of baby-friendly hospitals to the total number of national hospitals with maternity units was low in most countries.ConclusionsBreastfeeding practices within the WHO European Region, especially exclusive breastfeeding rates, are far from complying with the WHO recommendations. There are marked differences between countries in breastfeeding practices, infant and young child feeding policy adoption and proportion of baby-friendly hospitals.