bluuebunny/crossref_metadata_2025_split huggingface dataset:
Constructive feedback for the growth of laser‐induced periodic surface structures
Authors: Déziel Jean‐Luc , Dumont Joey , Gagnon Denis , Dubé Louis J. , Messaddeq Sandra H. , Messaddeq Younès 
Published: January 2016

AbstractWe study the formation and growth of laser‐induced periodic surface structures (LIPSSs) with the finite‐difference time‐domain (FDTD) method. We use a recently proposed inter‐pulse feedback method to account for the evolution of the surface morphology between each laser pulse sent to the surface of the processed material. This method has been used with an ablation‐like mechanism, by removing material exposed to a light intensity higher than a given threshold.We propose an inverse mechanism, an expansion‐like mechanism, able to grow structures that the ablation‐like process cannot. This allows us to introduce the notions of constructive and destructive feedback and explains a strong contradiction between the standard Sipe‐Drude theory and the experimental observations, i.e. the formation on metals of structures usually linked to wide band gap dielectrics. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Growth of compressively‐strained GaN films on Si(111) substrates with thick AlGaN transition and AlGaN superlattice buffer layers
Authors: Pan Lei , Dong Xun , Ni Jinyu , Li Zhonghui , Yang Qiankun , Peng Daqing , Li Chuanhao 
Published: January 2016

AbstractIn this paper, crack‐free GaN films with step‐graded AlGaN transition layer and AlGaN superlattice layer as buffer layers were grown on Si(111) substrate by metal‐organic chemical vapor deposition(MOCVD). The combination of both buffers effectively improves the properties of GaN layer. With the optimization of the buffer structures, high quality compressively‐strained GaN layers with thickness up to 3.6 μm have been obtained on Si(111) substrates (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Cell-Surface MMP-9 Protein Is a Novel Functional Marker to Identify and Separate Proangiogenic Cells from Early Endothelial Progenitor Cells Derived from CD133+ Cells
Authors: Kanayasu-Toyoda Toshie , Tanaka Takeshi , Kikuchi Yutaka , Uchida Eriko , Matsuyama Akifumi , Yamaguchi Teruhide 
Published: January 2016

Abstract
To develop cell therapies for ischemic diseases, endothelial progenitor cells (EPCs) have been expected to play a pivotal role in vascular regeneration. It is desirable to use a molecular marker that is related to the function of the cells. Here, a quantitative polymerase chain reaction array revealed that early EPCs derived from CD133+ cells exhibited significant expression of MMP-9. Some populations of early EPCs expressed MMP-9 on the cell surface and others did not. We also attempted to separate the proangiogenic fraction from early EPCs derived from CD133+ cells using a functional cell surface marker, and we then analyzed the MMP-9+ and MMP-9− cell fractions. The MMP-9+ cells not only revealed higher invasion ability but also produced a high amount of IL-8. Moreover, the stimulative effect of MMP-9+ cells on angiogenesis in vitro and in vivo was prohibited by anti-IL-8 antibody. These data indicate that MMP-9 is one of the useful cell surface markers for the separation of angiogenic cells. Our treatment of early EPCs with hyaluronidase caused not only a downregulation of cell-surface MMP-9 but also a decrease in invasion ability, indicating that membrane-bound MMP-9, which is one of the useful markers for early EPCs, plays an important role in angiogenesis.
Tetrandrine induces programmed cell death in human oral cancer CAL 27 cells through the reactive oxygen species production and caspase‐dependent pathways and associated with beclin‐1‐induced cell autophagy
Authors: Lien Jin‐Cherng , Lin Meng‐Wei , Chang Shu‐Jen , Lai Kuang‐Chi , Huang An‐Cheng , Yu Fu‐Shun , Chung Jing‐Gung 
Published: January 2016

ABSTRACTTetrandrine, a bisbenzylisoquinoline alkaloid, is extracted from the root of the Chinese herb Radix Stephania tetrandra S Moore. This compound has antitumor activity in different cancer cell types. In this study, the effects of tetrandrine on human oral cancer CAL 27 cells were examined. Results indicated that tetrandrine induced cytotoxic activity in CAL 27 cells. Effects were due to cell death by the induction of apoptosis and accompany with autophagy and these effects were concentration‐ and time‐dependent manners. Tetrandrine induced apoptosis was accompanied by alterations in cell morphology, chromatin fragmentation, and caspase activation in CAL 27 cells. Tetrandrine treatment also induced intracellular accumulation of reactive oxygen species (ROS). The generation of ROS may play an important role in tetrandrine‐induced apoptosis. Tetrandrine triggered LC3B expression and induced autophagy in CAL 27 cells. Tetrandrine induced apoptosis and autophagy were significantly attenuated by N‐acetylcysteine pretreatment that supports the involvement of ROS production. Tetrandrine induced cell death may act through caspase‐dependent apoptosis with Beclin‐1‐induced autophagy in human oral cancer cells. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 329–343, 2017.
Contraction‐based uterine artery Doppler velocimetry: novel approach for prediction of preterm birth in women with threatened preterm labor
Authors: Olgan S. , Celiloglu M. 
Published: January 2016

ABSTRACTObjectiveTo evaluate whether uterine artery (UtA) Doppler velocimetry during peak uterine contraction is a useful marker for the prediction of preterm delivery.MethodsIn this prospective cohort study, 172 patients admitted with preterm (24–35 weeks' gestation) uterine contractions were evaluated by UtA Doppler velocimetry during peak uterine contraction and by common obstetric measurements including cervical length. For UtA Doppler velocimetry, flow‐velocity waveforms during peak uterine contraction (determined visually on tocodynamometry) were recorded during three consecutive heart cycles, and the mean UtA pulsatility index (UtA‐PI) was calculated.ResultsUtA‐PI during the peak of contractions was significantly higher in patients who delivered within 7 days than in those who did not (P < 0.001). On receiver–operating characteristics curve analysis of UtA‐PI on contraction, the areas under the curve for prediction of delivery within 48 h, 7 days or 14 days, ≤ 35 weeks and ≤ 37 weeks were 0.92, 0.88, 0.81, 0.83 and 0.74, respectively. Multiple regression analysis identified UtA‐PI on contraction (P < 0.001) and cervical length (P < 0.001) as predictors of admission‐to‐delivery interval. The corresponding adjusted odds ratios for delivery within 7 days were 16.5 (95% CI, 5.7–47.2) for UtA‐PI on contraction ≥ 1.32, and 14.7 (95% CI, 5.2–41.8) for cervical length ≤ 28 mm.ConclusionUse of UtA Doppler velocimetry during peak uterine contraction for patients exhibiting symptoms of preterm labor might be effective for the identification of pregnant women at risk of preterm delivery. Copyright © 2016 ISUOG. Published by John Wiley & Sons Ltd.
Synthesis, Crystal Structure, and Optical Properties of (CH3NH3)2CoX4 (X = Cl, Br, I, Cl0.5Br0.5, Cl0.5I0.5, Br0.5I0.5)
Authors: Daub Michael , Stroh Regina , Hillebrecht Harald 
Published: January 2016

AbstractThe reaction of methylammonium halides and cobalt halides yielded the organic‐inorganic hybrid compounds of general formula (CH3NH3)2CoX4. By varying the different halides, we were able to synthesize the whole row from Cl to I as well as some mixed halides compounds and to determinate the crystal structures. (CH3NH3)2CoX4 (X = Cl, Br, Cl0.5Br0.5, Br0.5I0.5) crystallize isotypic to (CH3NH3)2HgCl4 in space group P21/c with Z = 4 [X = Cl: a = 7.6483(9), b = 12.6885(18), c = 10.8752(12) Å, β = 96.639(9)°; X = Cl0.5Br0.5: a = 7.8271(9), b = 12.9543(9), c = 11.1007(11) Å, β = 96.320(8)°; X = Br: a = 7.9782(2), b = 13.1673(2), c = 11.2602(2) Å, β = 96.3260(10)° and X = Br0.5I0.5: a = 8.2435(12), b = 13.645(2), c = 11.5856(18) Å, β = 95.54(2)°]. The mixed halides show a statistic distribution in both cases. In (CH3NH3)2CoCl2I2 an ordered variant is realized representing a new structure type [C2/m, Z = 4, a = 18.808(4), b = 7.3604(7), c = 10.4109(17) Å, β = 120.364(13)°]. (CH3NH3)2CoI4 crystallizes again isotypic to the respective mercury compound [(CH3NH3)2HgCl4] [Pbca, Z = 8, a = 10.9265(5), b = 12.1552(5), c = 20.9588(9) Å]. All structures are build up by inorganic tetrahedral [CoX4]2– anions and organic (CH3NH4)+ cations. Additionally the Raman spectra as well as the optical reflectance spectra are discussed.
In Situ Hypothermic Perfusion of the Liver for Complex Hepatic Resection: Surgical Refinements
Authors: Cauchy François , Brustia Raffaele , Perdigao Fabiano , Bernard Denis , Soubrane Olivier , Scatton Olivier 
Published: January 2016

AbstractIntroductionWhile total vascular exclusion (TVE) with veno‐venous bypass and hypothermia may be undertaken to increase liver tolerance for complex liver resection, these procedures are still associated with elevated rates of postoperative complications and mortality. In particular, one of the main issues of this strategy is the management of bleeding after declamping, which is enhanced by both hypothermic state and acidosis. To overcome this high risk of morbidity, several technical refinements might be undertaken and here described (with video).MethodsAll patients, requiring TVE >60 min and liver cooling during hepatectomy, were retrospectively included in this study. Technical key points as (a) patient selection, (b) anesthetic management, (c) two‐surgeon’s technique, (d) preparation for clamping, (e) veno‐venous bypass, (f) cooling of the liver, and (g) parenchymal transection, rewarming, and declamping are described and detailed.ResultsFrom 2011 to 2013, we included 8 cases of liver resection with TVE, veno‐venous bypass, and hypothermia for malignant disease. Due to the technical refinements, median observed overall blood loss of 550 ml (300–900) including 200 ml (50–300) at declamping and transfusion of packed red blood cell (PRBC) units was required in 5 patients with a mean of 1.25 PRBC/patient.ConclusionThe association of TVE, veno‐venous bypass, and liver cooling can reduce the time of transection, and blue dye injection and liver rewarming before declamping can reduce blood loss and coagulopathy. Altogether, limited blood loss can be achieved for these complex procedures and may allow to decreasing morbidity.
Wear characteristics of copper-based surface-level microcomposites and nanocomposites prepared by friction stir processing
Authors: Cartigueyen S. , Mahadevan K. 
Published: January 2016

Abstract
In this study, microsized and nanosized silicon carbide particles (SiCps) were successfully incorporated into commercial pure copper to form a surface metal matrix composite by friction stir processing (FSP) at low-heat-input conditions. A cluster of blind holes on a copper plate was used as particle deposition technique during the fabrication of the composite. Pin-on-disc testing was performed under dry sliding conditions to determine the wear characteristics of prepared composite surfaces. The homogeneity of particle distribution both inside the copper matrix and in the wear scar was determined via microstructural observations. It was observed that both microsized and nanosized SiCps were well distributed and homogenous in a stir zone; particles observed were without defects, and good bonding was observed between SiCps and the copper matrix. Comparisons between Cu/SiCp composite layers and friction stir processed (FSPed) Cu and as-received Cu showed that Cu/SiCp nanocomposite layers exhibited superior microhardness and dry sliding wear characteristics.
Friction between a temperature dependent viscoelastic body and a rough surface
Authors: Heise Rainer 
Published: January 2016

Abstract
In this study, we investigate the friction between a one-dimensional elastomer and a one-dimensional rigid randomly rough surface. Special emphasis is laid on the temperature dependence of the elastomer and its effect on the frictional behavior of the contact. The elastomer is modeled as a Kelvin body in a one-dimensional substitute model in the spirit of the method of dimensionality reduction. The randomly rough surface is a self-affine one-dimensional fractal. We provide a short discussion of a conical indenter pressed in a displacement controlled process into an elastomer. These analytical considerations are taken as a basis for the treatment of the randomly rough counter surface in contact to an elastomer with and without temperature dependent viscosity. We identify dimensionless quantities describing this process, introduce a thermal length scale, and give estimates for the coefficient of friction as function of velocity, indentation and thermal quantities.
Sonographic Diagnosis of Omphalocele in the Second Trimester of Pregnancy
Authors: Diwakar Rajendra Kumar , Chandrakar Karan , Naik Meena , Tiwari Apurva 
Published: January 2016

AbstractOmphaloceles or exomphalos are congenital midline abdominal wall defects at the base of the umbilical cord insertion with herniation of gut and/or liver or occasionally other content, out of the fetal abdomen. Prenatal detection has significantly increased with a wide use of ultrasound and alpha-fetoprotein screening. Omphaloceles detected early in pregnancy and containing only bowel, have increased risk of associated anomalies and chromosomal disorders.
Resveratrol augments therapeutic efficiency of mouse bone marrow mesenchymal stem cell‐based therapy in experimental autoimmune encephalomyelitis
Authors: Wang Dong , Li Shi‐Ping , Fu Jin‐Sheng , Bai Lin , Guo Li 
Published: January 2016

AbstractExperimental autoimmune encephalitis (EAE) is an inflammatory demyelinating disease, which served as a useful model providing considerable insights into the pathogenesis of multiple sclerosis (MS). Mouse bone marrow mesenchymal stem cells (mBM‐MSC) were shown to have neuroprotection capabilities in EAE. Resveratrol is a small polyphenolic compound and possess therapeutic activity in various immune‐mediated diseases. The sensitivity of mBM‐MSCs to resveratrol was determined by an established cell‐viability assay. Resveratrol‐treated mBM‐MSCs were also characterized with flow cytometry using MSC‐specific surface markers and analyzed for their multiple differentiation capacities. EAE was induced in C57BL/6 mice by immunization with MOG35‐55. Interferon gamma (IFN‐γ)/tumor necrosis factor alpha (TNF‐α) and interleukin‐4 (IL‐4)/interleukin‐10 (IL‐10), the hallmark cytokines that direct T helper type 1 (Th1) and Th2 development, were detected with enzyme‐linked immunosorbent assay (ELISA). In vivo efficacy experiments showed that mBM‐MSCs or resveratrol alone led to a significant reduction in clinical scores, and combined treatment resulted in even more prominent reduction. The combined treatment with mBM‐MSCs and resveratrol enhanced the immunomodulatory effects, showing suppressed proinflammatory cytokines (IFN‐γ, TNF‐α) and increased anti‐inflammatory cytokines (IL‐4, IL‐10). The combination of mBM‐MSCs and resveratrol provides a novel potential experimental protocol for alleviating EAE symptoms.
Randomized controlled trial comparing 200 μg and 400 μg sublingual misoprostol for prevention of primary postpartum hemorrhage
Authors: Ugwu Innocent A. , Oluwasola Timothy A. , Enabor Obehi O. , Anayochukwu‐Ugwu Ngozi N. , Adeyemi Abolaji B. , Olayemi Oladapo O. 
Published: January 2016

AbstractObjectiveTo compare efficacy and adverse effects of 200 μg and 400 μg misoprostol for prevention of postpartum hemorrhage (PPH).MethodsIn a randomized control trial, women with term singleton pregnancies in active labor attending University College Hospital, Ibadan, Nigeria, were enrolled between July 2011 and February 2012. Participants were randomly assigned using random numbers (block size four) to receive 200 μg or 400 μg sublingual misoprostol after delivery of the anterior shoulder, alongside intravenous oxytocin. Investigators were masked to group assignment, but participants were not. The primary outcomes were blood loss up to 1 h after delivery, PPH (blood loss ≥ 500 mL), and adverse effects.ResultsOverall, 62 patients were assigned to each group. No significant differences between the 200‐μg and 400‐μg groups were recorded in mean peripartum blood loss (307 ± 145 mL vs 296 ± 151 mL; P = 0.679) and PPH occurrence (5 [8.1%] vs 6 [9.7%] women; P = 0.752). Noticeable adverse effects were reported by 16 (25.8%) women in the 200‐μg group and 42 (67.7%) in the 400‐μg group (P < 0.001). Risk of shivering was significantly lower with 200 μg than 400 μg (relative risk 0.33, 95% confidence interval 0.19–0.58).ConclusionBlood loss and PPH occurrence did not differ by misoprostol dose, but a 200‐μg dose was associated with a reduction in adverse effects.Pan Africa Clinical Trials Registry: PACTR201505001107182
Reproducibility of a web-based FFQ for 13- to 15-year-old Danish adolescents
Authors: Bjerregaard Anne A. , Tetens Inge , Olsen Sjurdur F. , Halldorsson Thorhallur I. 
Published: January 2016

AbstractFFQ are widely used in large-scale studies to assess dietary intake. To aid interpretation of diet–disease associations assessment of validity must be performed. Reproducibility is one aspect of validity focusing on the stability of repeated assessment with the same method which may also reveal problems in instrument design or participant instructions. The aim of the present study was to evaluate the reproducibility of a web-based FFQ targeting Danish adolescents within the Danish National Birth Cohort (DNBC). Data for the present study were obtained from a prospective design nested within the DNBC. Adolescents aged 13 to 15 years old (n48, 60 % girls) completed the FFQ twice 4 weeks apart. The proportion of adolescents consistently classified into the same tertile according to amount of food intake ranged from 45 % (fish) to 77 % (vegetables), whereas classification into opposite tertiles ranged from 0 % (fruit, oils and dressing) to 15 % (beverages). Overall, no significant differences were observed in intake of food groups or nutrients between the two completions of the FFQ. Mean crude Spearman correlation for all food groups was 0·56 and mean intra-class correlation for all food groups was 0·61. In conclusion, the reproducibility of the FFQ for Danish adolescents was acceptable. The study revealed that adolescents aged 13–15 years seemed capable of recalling consistently overall dietary habits and had some difficulties estimating the frequency of consumption of regularly consumed food items.
First Radiocarbon Chronology for Mwoakilloa (Mokil) Atoll, Eastern Caroline Islands, Micronesia
Authors: Poteate Aaron S , Fitzpatrick Scott M , Ayres William S , Thompson Adam 
Published: January 2016

AbstractGiven their sheer number and evidence for long-term prehistoric occupation, atolls occupy a unique position in the peopling of the Pacific. However, they have frequently been overlooked in favor of larger islands due to a host of logistical and other issues. Once viewed as marginal environments, current research is now showing that small islands like these may have been more attractive to settlers than once thought. A new research program in Micronesia is dedicated to examining atolls to better develop baseline chronologies and investigate long-term human adaptations. As part of the initial stage of the project, we present the first radiocarbon dates (n=10) from Mwoakilloa (Mokil) atoll, which support a continuous occupation beginning between 1700–1560 cal BP (2σ). When compared to the settlement of other atoll groups in Micronesia such as the Marshall Islands—along with the nearby high volcanic islands of Pohnpei and Kosrae at approximately 2000–1800 yr ago—the dates from Mwoakilloa suggest a nearly contemporaneous or only slightly later occupation. The recovery of faunal material also demonstrates the translocation of at least two animals (Pacific rat and dog) to the island by humans that was coeval with early settlement. Additionally, there is evidence of landscape transformation in the form of a relatively large artificial mound created by debris and platform accumulation unseen elsewhere in central-eastern Micronesia, but common to atolls. These new dates reinforce the notion that Mwoakilloa and other atolls are integral to understanding prehistoric adaptations across the vast Pacific, though many questions still remain such as to the degree of interaction that occurred with nearby islands and whether settlement was continuous or intermittent through time.
First Radiocarbon Chronology for the Early Iron Age Sites of Central Kazakhstan (Tasmola Culture and Korgantas Period)
Authors: Beisenov Arman Z , Svyatko Svetlana V , Kassenalin Aibar Е , Zhambulatov Kairat А , Duisenbai Daniyar , Reimer Paula J 
Published: January 2016

AbstractWe present the first radiocarbon dates of Early Iron Age sites of central Kazakhstan (in total, 24 dates for 16 recently excavated sites). Archaeologically, the sites have been attributed to the Tasmola culture of the Saka period and later Korgantas phase of the early Hun period. The new accelerator mass spectrometry (AMS) 14C dates suggest that the majority of analyzed Tasmola sites belong to the beginning of the 8th–5th century cal BC, while Korgantas dates to the 4th–2nd century cal BC. This corresponds with the latest archaeological data for the region; however, it is somewhat contrary to the traditional perception of the chronology of the Scythian period in central Kazakhstan. The new dates suggest the beginning of the Early Scythian period in the region in at least the late 9th or 8th century BC rather than 7th century BC according to the traditional approach.
Radiocarbon Dating of Agrarian Terraces by Means of Buried Soils
Authors: Puy Arnald , Balbo Andrea L , Bubenzer Olaf 
Published: January 2016

AbstractSoils buried under terrace fills have been widely used to date the construction of ancient agrarian terraces. The reliability of the obtained radiocarbon dates entirely depends on the degree of preservation and isolation of the Ab horizons and on the amount of embedded older carbon. To assess these caveats, we analyzed 1414C dates (11 on charred material and 3 on the bulk organic fraction) obtained from buried soils under Andalusi terrace fills in Ricote, Spain (AD 711–1492). The preservation of Ab horizons was assessed through bulk analyses [particle size distribution (PSD), carbon analyses, magnetic susceptibility (Mag Sus)] and statistics [Welch’s ANOVA, MANOVA (Wilk’s lambda) and effect size tests]. The effects of older carbon were quantified through the systematic dating of Ab horizons within the earliest terrace cluster of Ricote. Our results show that (1) Ab horizons were not disturbed nor mixed with the terrace fills above; (2) the dates determined from the bulk organic fraction were statistically significantly older than those provided by the charred material, probably due to the higher stability of the microcharcoal fraction; and (3) the earliest dates measured on charcoal clustered reliably around cal AD 989–1210, suggesting that the first Andalusi irrigated terraces of Ricote were built between the end of the 10th and the beginning of the 13th centuries AD.
A Late Roman ‘Hall’ at Batten Hanger, West Sussex
Authors: Kenny James , Lyne Malcolm , Magilton John , Buckland Paul 
Published: January 2016

AbstractExcavation of the latest surviving structures of the villa at Batten Hanger in West Sussex indicates that a large aisled building was demolished in the late fourth or fifth century and replaced by a large hall 31.6 m long by 11.5 m wide, orientated approximately east–west. The survival of pad stones shows this space to have been divided into seven bays, with the more westerly bays screened off by a cross wall. The east wall of the building had collapsed outwards and was largely complete. A coin of Valentinian III suggests that occupation continued at least to the middle of the fifth century. The Supplementary Material available online (http://journals.cambridge.org/bri) contains a detailed presentation of the coin hoard and the pottery assemblages.