bluuebunny/crossref_metadata_2025_split huggingface dataset:
Endoscopic management of complications of self-expandable metal stents for treatment of malignant esophageal stenosis and tracheoesophageal fistulas
Authors: Bor Renáta , Fábián Anna , Bálint Anita , Farkas Klaudia , Szűcs Mónika , Milassin Ágnes , Czakó László , Rutka Mariann , Molnár Tamás , Szepes Zoltán 
Published: August 2017

Background: Self-expandable metal stent (SEMS) implantation may rapidly improve the symptoms of malignant esophageal stenosis and tracheoesophageal fistulas (TEF). However, dysphagia often returns subsequently and repeated endoscopic intervention may be necessary. The aims of the study were to identify the risk factors of complications, and the frequency and efficacy of repeated endoscopic interventions; and to provide technical recommendations on appropriate stent selection. Methods: We analyzed retrospectively the clinical data of 212 patients with locally advanced esophageal cancer who underwent SEMS implantation. Results: A total of 238 SEMS implantations were performed with 99.06% technical success and 1.26% procedure-related deaths in the enrolled 212 cases. Complications occurred in 84 patients (39.62%) and in 55 cases (25.94%) repeated endoscopic procedures were required. Early reintervention 24–48 h after the stent implantations was necessary due to stent migration (12 cases), arrhythmia (2 cases), intolerable retrosternal pain (1 case) and dyspnea (1 case). An average of 1.98 repeated gastroscopies (range 1–6; median 2), 13.58 weeks (range 1.5–48; median 11) after the stent implantation were performed during the follow-up period: 37 stent repositions, 23 restent implantations, 15 endoscopic esophageal dilations and 7 stent removals. In 48 cases (87.3%) oral feeding of patients was made possible by endoscopic interventions. Conclusions: In a quarter of SEMS implantations, complications occur that can be successfully managed by endoscopic interventions. Our experiences have shown that individualized stent choice may substantially reduce the complications rate and make repeated endoscopic interventions easier.
Hip Fractures in Elderly People: Surgery or No Surgery? A Systematic Review and Meta-Analysis
Authors: van de Ree Cornelis L. P. , De Jongh Mariska A. C. , Peeters Charles M. M. , de Munter Leonie , Roukema Jan. A. , Gosens Taco 
Published: August 2017

Introduction: Increasing numbers of patients with hip fractures also have advanced comorbidities. A majority are treated surgically. However, a significantly increasing percentage of medically unfit patients with unacceptably high risk of perioperative death are treated nonoperatively. Important questions about patients’ prefracture quality of life (QOL) and future perspectives should be asked before considering different treatment options to assess what kind of treatment is advisable in frail elderly high-risk patients with a hip fracture. Objective: The aim of this review was to provide an overview of differences in mortality, health-related QOL [(HR)QOL], functional outcome, and costs between nonoperative management (NOM) and operative management (OM) of hip fractures in patients above 65 years. Methods: A systematic literature search was performed in EMBASE, OvidSP, PubMed, Cochrane Central, and Web of Science for observational studies and trials. Observational studies and randomized controlled trials comparing NOM with OM in hip fracture patients were selected. The methodological quality of the selected studies was assessed according to the Methodological Index for Nonrandomized Studies (MINORS) or Furlan checklist. Results: Seven observational studies were included with a total of 1189 patients, of whom 242 (20.3%) were treated conservatively. The methodological quality of the studies was moderate (mean: 14.7, standard deviation [SD]: 1.5). The 30-day and 1-year mortalities were higher in the nonoperative group (odds ratio [OR]: 3.95, 95% confidence interval [CI]: 1.43-10.96; OR: 3.84, 95% CI: 1.57-9.41). None of the included studies compared QOL, functional outcome, or health-care costs between the 2 groups. Conclusion: This systematic review and meta-analysis demonstrated that only a few studies with small number of patients comparing NOM with OM were published. A significantly higher 30-day and 1-year mortality was revealed in nonoperatively treated hip fracture patients. No data were found examining (HR)QOL and costs. Further work is needed to enable shared decision-making and to initiate NOM in frail elderly patients with advanced comorbidity and limited life expectancy.
Testing the Hip Abductor Muscle Strength of Older Persons Using a Handheld Dynamometer
Authors: Awwad Daniel H. , Buckley Jonathan D. , Thomson Rebecca L. , O’Connor Matthew , Carbone Tania A. , Chehade Mellick J. 
Published: August 2017

Objective: To investigate the reliability of a clinically applicable method of dynamometry to assess and monitor hip abductor muscle strength in older persons. Design: Bilateral isometric hip abductor muscle strength measured with a handheld dynamometer, patients supine with the contralateral hip positioned directly against a wall for stabilization. Reliability determined by comparing intra-assessor and inter-assessor results and comparison to a criterion standard (stabilized dynamometer with patients in the standing position). Setting: UniSA Nutritional Physiology Research Centre. Participants: Twenty-one patients older than 65 years were recruited from the Royal Adelaide Hospital. Main Outcome Measures: Intraclass correlation coefficients (ICCs), bias, and limits of agreement calculated to determine reliability. Results: Intra-assessor and inter-assessor ICCs were high (0.94 and 0.92-0.94, respectively). There was no intra-assessor bias and narrow limits of agreement (±2.4%). There was a small inter-assessor bias but narrow limits of agreement (0.6%-0.9% and ± 2.3%, respectively). There was a wide variation comparing results to the criterion standard (±5.0%-5.2% limits of agreement), highlighting problems attributed to difficulties that the test population had with the standing position used in the criterion standard test. Conclusions: Testing older persons’ hip abductor muscle strength while in the supine position with optimal pelvic stabilization using a handheld dynamometer is highly reliable. While further studies must be done to assess patients with specific pathologies, this test has potential application to monitor and evaluate the effects of surgical interventions and/or rehabilitation protocols for a variety of conditions affecting hip abductor function such as hip fractures and arthritis.
Lower Quarter Y-Balance Test Scores and Lower Extremity Injury in NCAA Division I Athletes
Authors: Lai Wilson C. , Wang Dean , Chen James B. , Vail Jeremy , Rugg Caitlin M. , Hame Sharon L. 
Published: August 2017

Background: Functional movement tests that are predictive of injury risk in National Collegiate Athletic Association (NCAA) athletes are useful tools for sports medicine professionals. The Lower Quarter Y-Balance Test (YBT-LQ) measures single-leg balance and reach distances in 3 directions. Purpose: To assess whether the YBT-LQ predicts the laterality and risk of sports-related lower extremity (LE) injury in NCAA athletes. Study Design: Case-control study; Level of evidence, 3. Methods: The YBT-LQ was administered to 294 NCAA Division I athletes from 21 sports during preparticipation physical examinations at a single institution. Athletes were followed prospectively over the course of the corresponding season. Correlation analysis was performed between the laterality of reach asymmetry and composite scores (CS) versus the laterality of injury. Receiver operating characteristic (ROC) analysis was used to determine the optimal asymmetry cutoff score for YBT-LQ. A multivariate regression analysis adjusting for sex, sport type, body mass index, and history of prior LE surgery was performed to assess predictors of earlier and higher rates of injury. Results: Neither the laterality of reach asymmetry nor the CS correlated with the laterality of injury. ROC analysis found optimal cutoff scores of 2, 9, and 3 cm for anterior, posteromedial, and posterolateral reach, respectively. All of these potential cutoff scores, along with a cutoff score of 4 cm used in the majority of prior studies, were associated with poor sensitivity and specificity. Furthermore, none of the asymmetric cutoff scores were associated with earlier or increased rate of injury in the multivariate analyses. Conclusion: YBT-LQ scores alone do not predict LE injury in this collegiate athlete population. Sports medicine professionals should be cautioned against using the YBT-LQ alone to screen for injury risk in collegiate athletes.
Arterial branching and basal ganglia lacunes: A study in pure small vessel disease
Authors: Moreton Fiona C , Düring Marco , Phan Thanh , Srikanth Velandai , Beare Richard , Huang Xuya , Jouvent Eric , Chabriat Hugues , Dichgans Martin , Muir Keith W 
Published: August 2017

Introduction Lacunes are defined morphologically by size and location, but radiological characteristics alone may be unable to distinguish small vessel disease aetiology from alternative mechanisms. We investigated the branching order of arterial vessels associated with basal ganglia lacunes in cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), in order to improve the understanding of their pathogenesis in pure cerebral small vessel disease. Patients and methods Adults with a confirmed diagnosis of CADASIL were included. A pilot study was conducted in a Scottish CADASIL cohort. The Paris–Munich CADASIL cohort was used for independent validation. Lacunes identified on T1-weighted magnetic resonance imaging scans were registered to a standard brain template. A microangiographic template of the basal ganglia vasculature was automatically overlaid onto coronal slices, and raters estimated the vessel branching order related to each lacune. Results Of 179 lacunes, 150 (84%) were associated with third-order vessels. In 14 incident lacunes, 11 (79%) were associated with third-order vessels. In the pilot study, lacune volume was significantly lower in lacunes associated with third-order vessels (0.04 ml ± 0.04 ml) compared to second-order vessels (0.48 ± 0.16 ml; p < 0.001). Discussion In this study of CADASIL patients, most lacunes were small and associated with third-order vessel disease. This suggests that these are the vessels primarily affected in cerebral small vessel disease. Microangiographic template techniques could be used to further investigate in a general stroke population whether finding large lacunes originating from higher order vessels indicates an alternative cause of stroke. Conclusion Lacunes in pure small vessel disease are associated with the smallest vessels in the basal ganglia.
Gurimite, Ba3(VO4)2 and
hexacelsian, BaAl2Si2O8 – two new minerals
from schorlomite-rich paralava of the Hatrurim Complex, Negev Desert,
Israel
Authors: Galuskina Irina O. , Galuskin Evgeny V. , Vapnik Yevgeny , Prusik Krystian , Stasiak Marta , Dzierżanowski Piotr , Murashko Mikhail 
Published: August 2017

AbstractTwo new barium-bearing minerals: gurimite,
Ba3(VO4)2 (IMA2013-032) and hexacelsian,
BaAl2Si2O8 (IMA2015-045) were discovered
in veins of paralava cutting gehlenite-flamite hornfels located in the Gurim
Anticline in the Negev Desert, Israel. Gurimite and hexacelsian occur in
oval polymineralic inclusions in paralava and are associated with gehlenite,
pseudowollastonite or wollastonite, rankinite, flamite, larnite,
schorlomite, andradite, fluorapatite, fluorellestadite, kalsilite,
cuspidine, aradite, zadovite and khesinite. Gurimite and hexacelsian form
elongate crystals <10 μm thick. The minerals are colourless and
transparent with a white streak and vitreous lustre, and have (0001)
cleavage, respectively good in gurimite and very good in hexacelsian.
Fracture is irregular. Density calculated using empirical formulas gave
5.044 g cm–3 for gurimite and 3.305 g cm–3 for
hexacelsian. Mean refractive indexes, 1.945 and 1.561, respectively, were
also calculated using the empirical formulas and the Gladstone-Dale
relationship. The minerals are uniaxial and nonpleochroic. The following
empirical crystal chemical formulae were assigned to holotype gurimite:
(Ba2.794K0.092Ca0.084Na0.033Sr0.017)∑3.020(V1.8275+S0.0916+P0.0515+Al0.040Si0.005Fe0.0053+)∑2.017O8,and holotype hexacelsian:
(Ba0.911K0.059Ca0.042Na0.010)∑1.022Al1.891Fe0.0723+Si2.034O8. The Raman spectrum of
hexacelsian is similar to the one of the synthetic disordered
β-BaAl2Si2O8. The Raman spectrum of
gurimite is identical to that of synthetic
Ba3(VO4)2. The electron back-scattered
diffraction (EBSD) pattern of gurimite was fitted to the structure of its
synthetic analogue with the cell parameters of
R3m, a =
5.784(1),c = 21.132(1) Å, V = 612.2(2)
Å3, Z = 3, giving a mean angular deviation =
0.43° (good fit). The Raman spectra of hexacelsian and its EBSD pattern
suggest that natural hexacelsian corresponds to disordered synthetic
β-hexacelsian P63/mcm,
a = 5.2920(4) Å, c = 15.557(2) Å, α = β
= 90°, γ = 120°. We suggest that after relatively fast crystallization of
the main constituents of the paralava, gurimite, hexacelsian and also other
Ba-bearing phases crystallized from residual melt enriched in incompatible
elements that filled interstices between crystals of the main
constituents.
New data on hemihedrite from Arizona
Authors: Lafuente B. , Downs R. T. , Origlieri M. J. , Domanik K. J. , Gibbs R. B. , Rumsey M. S. 
Published: August 2017

AbstractHemihedrite from the Florence Lead-Silver mine in Pinal County, Arizona, USA was first described and assigned the ideal chemical formula Pb10Zn(CrO4)6(SiO4)2F2, based upon a variety of chemical and crystal-structure analyses. The primary methods used to determine the fluorine content for hemihedrite were colorimetry, which resulted in values of F that were too high and inconsistent with the structural data, and infrared (IR) spectroscopic analysis that failed to detect OH or H2O. Our reinvestigation using electron microprobe analysis of the type material, and additional samples from the type locality, the Rat Tail claim, Arizona, and Nevada, reveals the absence of fluorine, while the presence of OH is confirmed by Raman spectroscopy. These findings suggest that the colorimetric determination of fluorine in the original description of hemihedrite probably misidentified F due to the interferences from PO4and SO4, both found in our chemical analyses. As a consequence of these results, the study presented here proposes a redefinition of the chemical composition of hemihedrite to the ideal chemical formula Pb10Zn(CrO4)6(SiO4)2(OH)2. Hemihedrite is isotypic with iranite with substitution of Zn for Cu, and raygrantite with substitution of Cr for S. Structural data from a sample from the Rat Tail claim, Arizona, indicate that hemihedrite is triclinic in space groupP1,a= 9.4891(7),b= 11.4242(8),c= 10.8155(7) Å, α = 120.368(2)°, β = 92.017(3)°, γ = 55.857(2)°,V= 784.88(9) Å3,Z= 1, consistent with previous investigations. The structure was refined from singlecrystal X-ray diffraction data toR1= 0.022 for 5705 unique observed reflections, and the ideal chemical formula Pb10Zn(CrO4)6(SiO4)2(OH)2was assumed during the refinement. Electron microprobe analyses of this sample yielded the empirical chemical formula Pb10.05(Zn0.91Mg0.02)∑ = 0.93(Cr5.98S0.01P0.01)∑ = 6.00Si1.97O34H2.16based on 34 O atoms and six (Cr + S + P) per unit cell.
Mixing of basaltic and andesitic magmas in the Bazman volcanic
field of southeastern Iran as inferred from plagioclase
zoning
Authors: Firouzkouhi Zahra , Ahmadi Ali , Richard Lentz David , Moridi-Farimani Ali-Asghar 
Published: August 2017

AbstractLate Cenozoic basalts of the Bazman volcanic field, Makran volcanic arc of
southern Iran, contain two types of plagioclase feldspar phenocrysts with
significant textural and compositional differences. The most common type is
rather homogeneous with only weak zoning and maximum An content of 83 mol.%.
The less common type of phenocryst exhibits complex zoning and, other than
rims, is close in composition and similar in texture to those of associated
andesites. This type of plagioclase phenocryst is characterized by an
engulfed core with oscillatory zoning, which is overgrown by sieve-textured,
moderately zoned mantle, and a relatively narrow rim. In both rock types,
the An content of the core is between 40 and 63 mol.% with abrupt
fluctuations. No significant correlation between An content and MgO, FeO,
SrO and BaO is apparent in the core of phenocrysts in basalts. Anorthite
content of the core of phenocrysts in andesites inversely correlates with
SrO and BaO. The mantle of plagioclase phenocrysts in both rock types is
characterized by sharp increases of An (up to 41 mol.%), MgO, and FeO, in
the contact with the core. Anorthite correlates positively with MgO and FeO
in the mantle, but correlation between An and SrO and BaO is not evident. It
is assumed that plagioclase phenocrysts originally crystallizing from the
host andesitic magma were interrupted by mixing with a hotter, juvenile
basaltic magma. The resulting changes in temperature, composition, and
H2O content of the surrounding melt caused compositional
zonation, and the development of resorption in the cores and sieve texture
in the mantles. As the An contents of the rims of the phenocrysts resemble
the average An content of the groundmass plagioclases in both rock types, it
is thought that the two involved magmas gained their independent physical
identity before the formation of compositionally-distinct rims of
plagioclase phenocrysts.
Compositional variation of turquoise-group minerals from the historical collection of the Real Museo Mineralogico of the University of Naples
Authors: Rossi Manuela , Rizzi Rosanna , Vergara Alessandro , Capitelli Francesco , Altomare Angela , Bellatreccia Fabio , Saviano Michele , Ghiara Rosaria M. 
Published: August 2017

AbstractFive turquoise samples, belonging to the XVII century historical collection of the Real Museo Mineralogico (University of Naples Federico II), were investigated by a multi-methodological approach based on powder X-ray diffraction, electron microprobe analysis in wavelength-dispersive spectroscopy mode, backscattered electron images from scanning electron microscopy in energy-dispersive spectroscopy mode, laser ablation inductively coupled plasma mass spectrometry, Fourier transform infrared and Raman spectroscopy.The samples originate from Sinai (Egypt), Santa Fè S. Miguel (New Mexico), Saxony (Germany), Montebras Creuse (France) and Nishapur (Khorassan, Iran) and display different mineralogical compositions and various mineral associations. The study has shown the presence of: (1) four minerals of the turquoise group: turquoise, faustite, chalcosiderite and planerite; (2) other phosphates from different groups: wavellite, crandallite, goyazite, gorceixite, variscite, metavariscite, fluorapatite; and (3) other minerals: voltaite, adularia and quartz.The present investigation is intended to show the mineralogical and geochemical variability of the samples with particular attention to the mineralogical parageneses, textural analyses and trace-element concentrations.
Millsite, CuTeO3·2H2O: a new polymorph of teineite from Gråurdfjellet, Oppdal, Norway
Authors: Rumsey Michael S. , Welch Mark D. , Mo Frode , Kleppe Annette K. , Spratt John , Kampf Anthony R. , Raanes Morten P. 
Published: August 2017

ABSTRACTMillsite, CuTeO3·2H2O, is a new mineral from Gråurdfjellet in Oppdal, Norway. It occurs as a minor secondary phase alongside teineite, other copper secondaries and relict primary tellurides in a boulder of quartz-rich granite, which is probably a glacial erratic. Millsite is bright cyan to royal blue in colour. The mineral is transparent to slightly translucent with a vitreous lustre and has a perfect (100) cleavage. It is brittle, has a conchoidal fracture and a pale green streak. Millsite is optically biaxial (+), α = 1.756(5), β = 1.794(5), γ = 1.925calc and 2Vmeas = 60(1)°. Millsite has monoclinic space group P21/c, with a = 7.4049(2) Å, b = 7.7873(2) Å, c = 8.5217(2) Å, β = 110.203(3)°, V = 461.17(2) Å3 and Z = 4. The empirical formula is Cu0.99(Te0.98Se0.02)O3(H2O)2. The five strongest reflections in the powder X-ray diffraction pattern are [dhkl in Å (hkl, Irel%)]: 6.954 (100, 100), 3.558 (012, 64), 2.838 (12$\bar 2$, 47), 2.675 (211, 43) and 3.175 (210, 39). The crystal structure has been determined to R1 = 0.016, wR2 = 0.036 and GooF = 1.049. The diagnostic structural unit of millsite consists of a Cu2O6(H2O)4 dimer that is decorated with four TeO3 groups connecting adjacent dimers and defining (100) heteropolyhedral sheets. These heteropolyhedral sheets are only connected by layers of structurally significant hydrogen bonds and correlate with the (100) cleavage. Millsite is a polymorph of teineite with a unique configuration of the M2O6(H2O)4 dimer that leads to a sheet topology. No isostructural selenium or tellurium analogue exists. The monoclinic polymorph (P21/c) of chalcomenite ‘monoclinic-CuSeO3·2H2O’ hereafter, ahlfeldite and MgSeO3·2H2O have M2O6(H2O)4 dimers, but their configuration differs significantly from that of millsite and leads to a framework topology rather than a sheet. Teineite does not have a dimeric structure and so is fundamentally different from millsite. The sheet topology of millsite appears to be unique among tellurites.
Folvikite, Sb5+Mn3+(Mg,Mn2+)10O8(BO3)4, a new oxyborate mineral from the Kitteln mine, Nordmark ore district, Värmland, Sweden: description and crystal structure
Authors: Cooper Mark A. , Raade Gunnar , Ball Neil A. , Abdu Yassir A. , Hawthorne Frank C. , Rowe Ralph 
Published: August 2017

ABSTRACTFolvikite, Sb5+Mn3+(Mg,Mn2+)10O8(BO3)4, is a new oxyborate mineral from the Kitteln mine, Värmland, Sweden, where it occurs as a primary skarn mineral embedded in calcite. It forms striated prismatic crystals up to 0.3 mm, and is black to dark reddish-brown with submetallic lustre and a reddish-brown streak. It is brittle, has a Mohs hardness of 6, and the calculated density is 4.14 g/cm3. Folvikite is biaxial with indeterminate optic sign due to pervasive twinning. The optic axial angle is 68.9(4)°. Refractive indices were not measured; the calculated mean refractive index is 1.85. Strong pleochroism was observed in plane-polarized light: AB = brown (intermediate), OB = dark brown (maximum) and ON = honey brown (minimum). Folvikite is monoclinic, space group P2, a = 5.3767(10), b = 6.2108(10), c = 10.9389(18) Å, β = 94.399(9)°, V = 364.22(16) Å3 and Z = 1. Chemical analysis by electron microprobe gave Sb2O5 18.15, MgO 24.11, MnO 29.73, Mn2O3 11.62, Al2O3 0.27, Fe2O3 0.45, B2O3 15.27, sum 99.60 wt.%. The B2O3 content was assigned as B = 4 apfu and the Mn2O3 / (MnO + Mn2O3) ratio was determined from the crystal structure. The empirical formula was normalized on the basis of 20 anions pfu: (Sb5+1.02Mn3+1.34Al0.05Fe3+0.05Mg5.46Mn2+3.82□0.26)Σ12O8(BO3)4. A simplified formula may be written as Sb5+Mn3+(Mg,Mn2+)10O8(BO3)4 with Z = 1. The crystal structure was solved by direct methods and refined to an R1 index of 4.1%. Folvikite is a member of the (3 Å) zigzag wallpaper-borate structures in which chains of edge-sharing octahedra extend along the c axis and are cross-linked by BO3 groups. There are five X sites partly occupied by Mn2+ > Mg, one octahedrally coordinated M-site occupied by Sb5+ > Mg, two M sites occupied by Mg ≥ Mn > Sb5+, two M sites occupied by Mn3+ > Mn2+, two M sites occupied by Mg > Mn2+, and one M-site occupied by Mg > □; plus two [3]-coordinated B sites occupied by B. As with the other zigzag borates, the polyhedra are arranged in F-walls, C-walls and S-columns.