bluuebunny/crossref_metadata_2025_split huggingface dataset:
A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging
Authors: Strother Stephanie L. , Salzmann Ulrich , Sangiorgi Francesca , Bijl Peter K. , Pross Jörg , Escutia Carlota , Salabarnada Ariadna , Pound Matthew J. , Voss Jochen , Woodward John 
Published: April 2017

Abstract. Antarctic palaeoclimate evolution and vegetation history after the formation of a continent-scale cryosphere at the Eocene–Oligocene boundary, 33.9 million years ago, has remained a matter of controversy. In particular, the reconstruction of terrestrial climate and vegetation has been strongly hampered by uncertainties in unambiguously identifying non-reworked as opposed to reworked sporomorphs that have been transported into Antarctic marine sedimentary records by waxing and waning ice sheets. Whereas reworked sporomorph grains over longer non-successive geological timescales are easily identifiable within younger sporomorph assemblages (e.g. Permian sporomorphs in Pliocene sediments), distinguishing non-reworked from reworked material in palynological assemblages over successive geological time periods (e.g. Eocene sporomorphs in Oligocene sediments) has remained problematic. This study presents a new quantitative approach to identifying non-reworked pollen assemblages in marine sediment cores from circum-Antarctic waters. We measured the fluorescence colour signature, including red, green, and blue fluorescence; brightness; intensity; and saturation values of selected pollen and spore taxa from Eocene, Oligocene, and Miocene sediments from the Wilkes Land margin Site U1356 (East Antarctica) recovered during Integrated Ocean Drilling Program (IODP) Expedition 318. Our study identified statistically significant differences in red-fluorescence values of non-reworked sporomorph taxa against age. We conclude that red fluorescence is a reliable parameter for identifying the presence of non-reworked pollen and spores in Antarctic marine sediment records from the circum-Antarctic realm that are influenced by glaciation and extensive reworking. Our study provides a new tool to accurately reconstruct Cenozoic terrestrial climate change on Antarctica using fossil pollen and spores.
Restless legs syndrome in adolescents: relationship with sleep quality, cardiorespiratory fitness and body fat
Authors: Giannaki Christoforos D. , Hadjigeorgiou Georgios M. , Aphamis George , Pantzaris Marios , Sakkas Giorgos K. 
Published: April 2017

Abstract
Objective The aim of the current study was to investigate the relationship between restless legs syndrome (RLS) and cardiorespiratory fitness, body composition and sleep quality in a sample of adolescents.
Methods One hundred fifty seven volunteer adolescents (16.6 ± 0.7 yrs) participated in the study. Sleep quality was assessed by the Pittsburg sleep quality index. Cardiorespiratory fitness was assessed by the 20 m shuttle run test and body composition by bioelectrical impedance analysis.
Results The prevalence of RLS was 5.1%. The adolescents with RLS were found to exhibit significantly higher body fat levels (p=0.019) and poorer sleep quality score (p=0.000) compared with their free-RLS counterparts.
Conclusions Adolescents with RLS are subjects of higher body fat and impaired sleep quality compared with adolescents without RLS. Early diagnosis and appropriate management of RLS is essential in the adolescents.
Sonar observation of diffuse hydrothermal flows
Authors: Jackson D. R. , Ivakin A. N. , Xu G. , Bemis K. G. 
Published: April 2017

AbstractPrevious studies have used multibeam sonar data to map diffuse hydrothermal flows by exploiting the decorrelation of successive seafloor echoes caused by temperature fluctuations. The present work extends this approach to quantify temperature fluctuations integrated along the sonar line of sight. The method is illustrated using data from the Cabled Observatory Vent Imaging Sonar deployed at the Grotto Vent complex on the Endeavour Segment of the Juan de Fuca Ridge. Inversion results are presented in the form of the structure function for integrated temperature fluctuations. A three‐parameter fit to the structure function provides time series encapsulating statistics of these fluctuations.
Maternal metabolic adaptations to pregnancy among young women in Cebu, Philippines
Authors: Fried Ruby L. , Mayol Nanette L. , McDade Thom W. , Kuzawa Christopher W. 
Published: April 2017

AbstractObjectivesEvidence that fetal development has long‐term impacts on health has increased interest in maternal‐fetal nutrient exchange. Although maternal metabolism is known to change during gestation to accommodate fetal nutrient demands, little is known about these modifications outside of a Western, clinical context. This study characterizes maternal metabolic adaptations to pregnancy, and their associations with offspring birth weight (BW), among women living in the Philippines.METHODSFasting glucose, triglycerides, insulin, leptin, and adiponectin were assessed in 808 participants in the Cebu Longitudinal Health and Nutrition Survey (Metropolitan Cebu, Philippines). Cross‐sectional relationships between metabolites and hormones and gestational and lactational status were evaluated. Among the subset of currently pregnant women, associations between maternal glucose and triglycerides and offspring BW were also examined.RESULTSWomen in their second and third trimesters had significantly lower fasting glucose and adiponectin compared to nulliparous women, and leptin levels and triglyceride levels were notably higher late in pregnancy (all P < .05). Among pregnant women, fasting glucose was a positive predictor of offspring BW, but only in males (P = .012, R2 = .28). Hormones and metabolites in post‐partum women trend back toward levels found in nulliparous women, with some differences by breastfeeding status.CONCLUSIONSWe find evidence for marked changes in maternal lipid and carbohydrate metabolism during pregnancy, consistent with known adaptations to support fetal growth. The finding of sex‐specific relationships between maternal glucose and offspring BW adds to evidence for greater impacts of the maternal‐gestational environment on biology and health in male offspring.
Design of Boronic Acid–Base Complexes as Reusable Homogeneous Catalysts in Dehydrative Condensations between Carboxylic Acids and Amines
Authors: Lu Yanhui , Wang Ke , Ishihara Kazuaki 
Published: April 2017

AbstractTwo novel boronic acid–base complexes were developed as reusable homogeneous catalysts for amide condensation. First, quaternary ammonium resin‐bound boronates were shown to be effective catalysts that might release free boronic acids during reactions and could be regenerated afterwards. Next, a 1:1 mixture of 3,5‐dinitro‐4‐tolueneboronic acid and 4‐(N,N‐dimethylamino)pyridine N‐oxide (DMAPO) or 4‐(N,N,‐dimethylamino)pyridine (DMAP) cooperatively promoted amide formation and precipitated as an acid–base solid complex after cooling. These inexpensive and reusable complexes may be useful in large‐scale process chemistry.
Mo2B4O9—Connecting Borate and Metal‐Cluster Chemistry
Authors: Schmitt Martin K. , Janka Oliver , Pöttgen Rainer , Benndorf Christopher , de Oliveira Marcos , Eckert Hellmut , Pielnhofer Florian , Tragl Amadeus‐Samuel , Weihrich Richard , Joachim Bastian , Johrendt Dirk , Huppertz Hubert 
Published: April 2017

AbstractWe report on the first thoroughly characterized molybdenum borate, which was synthesized in a high‐pressure/high‐temperature experiment at 12.3 GPa/1300 °C using a Walker‐type multianvil apparatus. Mo2B4O9 incorporates tetrahedral molybdenum clusters into an anionic borate crystal structure—a structural motif that has never been observed before in the wide field of borate crystal chemistry. The six bonding molecular orbitals of the [Mo4] tetrahedron are completely filled with 12 electrons, which are fully delocalized over the four molybdenum atoms. This finding is in agreement with the results of the magnetic measurements, which confirmed the diamagnetic character of Mo2B4O9. The two four‐coordinated boron sites can be differentiated in the 11B MAS‐NMR spectrum because of the strongly different degrees of local distortions. Experimentally obtained IR and Raman bands were assigned to vibrational modes based on DFT calculations.
A Boat‐Shaped Tetracationic Macrocycle with a Semiconducting Organic Framework
Authors: Nguyen Minh T. , Krzyaniak Matthew D. , Owczarek Magdalena , Ferris Daniel P. , Wasielewski Michael R. , Stoddart J. Fraser 
Published: April 2017

AbstractWe report the synthesis of a tetracationic macrocycle which contains two N,N′‐bis(methylene)naphthalenediimide units inserted in between the pyridinium rings of the bipyridinium units in cyclobis(paraquat‐p‐phenylene) (CBPQT4+ or “blue box”) and describe the investigation of its potential use in materials for organic electronics. The incorporation of the two naphthalenediimide (NDI) units into the constitution of CBPQT4+, not only changes the supramolecular properties of the tetracation in the solid state, but also has a profound influence on the electrochemical and electronic behavior of the resulting tetracationic macrocycle. In particular, the solid‐state (super)structure, investigated by single‐crystal X‐ray diffraction, reveals the formation of a three‐dimensional (3D) supramolecular framework with ca. 2.8 nm diameter one‐dimensional (1D) hexagonal channels. Electrochemical studies on solid‐state thin films of the macrocycle show that they exhibit semiconducting properties with a redox‐conductivity of up to 7.6×10−4 S m−1. Moreover, EPR and ENDOR spectroscopies show that charge is equally shared between the NDIs within the one‐electron reduced state of the NDI‐based macrocycle on the time scale of these techniques.
A Modular Approach to Inorganic Phosphazane Macrocycles
Authors: Plajer Alex J. , García‐Rodríguez Raúl , Benson Callum G. M. , Matthews Peter D. , Bond Andrew D. , Singh Sanjay , Gade Lutz H. , Wright Dominic S. 
Published: April 2017

AbstractInorganic macrocycles, based on non‐carbon backbones, present exciting synthetic challenges in the systematic assembly of inorganic molecules, as well as new avenues in host–guest and supramolecular chemistry. Here we demonstrate a new high‐yielding modular approach to a broad range of trimeric and hexameric S‐ and Se‐bridged inorganic macrocycles based on cyclophosphazane frameworks, using the building blocks [S=(H)P(μ‐NR)]2. The method involves the in situ generation of the key intermediate [E
(S
)P(μ‐NR)]22−(E=S, Se) dianion, which can be reacted with electrophilic [ClP(μ‐NR)]2 to give PIII/PV hexameric rings or reacted with I2 to give trimeric PV variants. Important issues which are highlighted in this work are the competitive bridging ability of S versus Se in these systems and the synthesis of the first air‐stable and chiral inorganic macrocycles.
A Strong cis‐Effect in an Imidazole‐Imidazolium‐Substituted Alkene
Authors: Georgiou Dayne C. , Haghighatbin Mohammad A. , Hogan Conor F. , Scholz Michael S. , Bull James N. , Bieske Evan J. , Wilson David J. D. , Dutton Jason L. 
Published: April 2017

AbstractWe report the first example of an alkene with two carbon‐bound substituents (imidazole and imidazolium rings) where the Z‐isomer has a greater thermodynamic stability than the E‐isomer which persists in both the gas phase and in solution. Theoretical calculations, solution fluorescence spectroscopy and gas‐phase ion mobility mass spectrometry studies confirm the preference for the Z‐isomer, the stability of which is traced to a non‐covalent interaction between the imidazole lone pair and the imidazolium ring.
Facile one‐pot synthesis of a series of 7‐aryl‐8H‐benzo[h]indeno[1,2‐b]quinoline‐8‐one derivatives catalyzed by cellulose‐based magnetic nanocomposite
Authors: Maleki Ali , Nooraie Yeganeh Narges 
Published: April 2017

A sulfonated magnetic cellulose‐based nanocomposite was applied as an efficient, inexpensive and green catalyst for the one‐pot three‐component synthesis of 7‐aryl‐8H‐benzo[h]indeno[1,2‐b]quinoline‐8‐ones starting from 1,3‐indanedione, aromatic aldehydes and 1‐naphthylamine under solvent‐free conditions in high yields (79–98%) within short reaction times (2–5 min). The nanobiostructure catalyst can be easily separated from the reaction mixture by using an external magnet and reused several times.
Combined soft lithographic transfer‐printing and patterning method of highly fluorinated polymers as a facile surface treatment protocol
Authors: Lee Da‐Hyeok , Jung Seok‐Heon , Kwon O Jun , Kim Myoung‐Soo , Park Jin‐Seok , Lee Eunhye , Jung Byung Jun , O Beom‐Hoan , Park Se‐Geun , Lee Jin‐Kyun 
Published: April 2017

ABSTRACTA combined soft lithographic transfer‐printing and patterning method of highly fluorinated polymers was investigated aiming to establish a facile surface treatment protocol for various substrates. Spin‐coated layers of poly(1H,1H,2H,2H‐perfluorodecyl methacrylate) (PFDMA) on patterned polydimethylsiloxane (PDMS) molds were transfer‐printed successfully on silicon, glass, aluminum substrates, resulting in the well‐controlled production of nano to micrometer‐scale periodic structures. With careful optimization of the dimension and density of the PFDMA patterns, it was possible to achieve a water contact angle as high as 175° on the transfer‐printed highly fluorinated polymer film. One of the advantages of the transfer‐patterning method is that highly fluorinated polymer films can be printed on curved surfaces while retaining their superhydrophobic and corrosion‐prevention character. In addition, the transfer‐printed PFDMA layers on the glass plates showed enhanced light transmission, which led to the extraction of 10% more light when they were applied to the emitting side of green organic light‐emitting devices. The micro‐patterned PFDMA surfaces also exhibited a significantly reduced level of bacterial adhesion when they were incubated in human bile juice. These results strongly suggest that the proposed facile transfer‐patterning protocol of highly fluorinated polymer films can be a suitable surface‐treatment technique for implantable electronic devices that exhibit improved device performance and anti‐biofouling nature. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45184.
Teaching neuroanatomy using computer‐aided learning: What makes for successful outcomes?
Authors: Svirko Elena , Mellanby Jane 
Published: April 2017

Computer‐aided learning (CAL) is an integral part of many medical courses. The neuroscience course at Oxford University for medical students includes CAL course of neuroanatomy. CAL is particularly suited to this since neuroanatomy requires much detailed three‐dimensional visualization, which can be presented on screen. The CAL course was evaluated using the concept of approach to learning. The aims of university teaching are congruent with the deep approach—seeking meaning and relating new information to previous knowledge—rather than to the surface approach of concentrating on rote learning of detail. Seven cohorts of medical students (N = 869) filled in approach to learning scale and a questionnaire investigating their engagement with the CAL course. The students' scores on CAL‐course‐based neuroanatomy assessment and later university examinations were obtained. Although the students reported less use of the deep approach for the neuroanatomy CAL course than for the rest of their neuroanatomy course (mean = 24.99 vs. 31.49, P < 0.001), deep approach for CAL was positively correlated with neuroanatomy assessment performance (r = 0.12, P < 0.001). Time spent on the CAL course, enjoyment of it, the amount of CAL videos watched and quizzes completed were each significantly positively related to deep approach. The relationship between deep approach and enjoyment was particularly notable (25.5% shared variance). Reported relationships between deep approach and academic performance support the desirability of deep approach in university students. It is proposed that enjoyment of the course and the deep approach could be increased by incorporation of more clinical material which is what the students liked most. Anat Sci Educ 10: 560–569. © 2017 American Association of Anatomists.
Vanadium(V)‐Induced Oxidative Cross‐Coupling of Various Boron and Silyl Enolates
Authors: Amaya Toru , Osafune Yuma , Maegawa Yusuke , Hirao Toshikazu 
Published: April 2017

AbstractIntermolecular oxidative cross‐coupling of two different enolates is one of the most useful reactions to synthesize unsymmetrical 1,4‐dicarbonyl compounds. In this study, the oxovanadium(V)‐induced intermolecular oxidative cross‐coupling of enolates afforded unsymmetrical 1,4‐dicarbonyl compounds. Various boron and silyl enolates underwent the formation of ketone–ester, ester–ketone, ester–ester, amide–ketone and amide–ester coupling products . These results clearly show the versatility of the present oxidative cross‐coupling protocol.
Connected Parking
Authors: Müller Miriam 
Published: April 2017

AbstractMit Connected Parking bietet das Technologie‐ und Dienstleistungsunternehmen Bosch smarte Services, um die Parkplatzsuche zu vereinfachen und die daraus resultierenden Folgen zu entschärfen. So wird künftig mit der Hilfe der Services „Aktives Parkraum‐Management” und „Community‐based Parking” ein Blick auf das Navigationsgerät oder das Smartphone genügen, um den nächstgelegenen freien Parkplatz am Straßenrand, auf Parkplätzen oder im Parkhaus zu finden. Ermöglicht wird dies durch größtenteils bereits serienmäßig installierte Fahrzeugsensorik sowie infrastrukturseitig verbaute Bodensensoren, die freie Stellplätze erkennen und zentral sammeln. Parkplatzsuchende erhalten die Informationen über Parklücken in Echtzeit und können so direkt und ohne Umwege zu freien Stellplätzen geführt werden. Hierdurch werden die Parkprobleme im innerstädtischen Raum deutlich vermindert und die Lebensqualität erhöht. Gleichzeitig wird durch die Minderung des Parksuchverkehrs durch die Connected‐Parking‐Services der Ausstoß von Fahrzeugemissionen in der Stadt reduziert.Im Zuge des „Automated Valet Parking” erfolgt der Einparkvorgang voll automatisiert und fahrerlos. Der Parkplatzsuchende gibt hierbei sein Auto an der Einfahrt zu Parkplätzen oder Parkhäusern ab und lässt es mithilfe der intelligenten Infrastruktur selbstständig zum freien Parkplatz fahren und parken. Hiervon profitieren zudem die Parkraumbetreiber durch die Effizienzsteigerung der vorhandenen Parkräume, da signifikant mehr Fahrzeuge auf derselben Fläche untergebracht werden können.
Anwendung von reaktiven Brandschutzsystemen im Stahlbau
Authors: Schaumann Peter , Tabeling Florian , Weisheim Waldemar 
Published: April 2017

AbstractIm Bestreben nach schlanken und architektonisch ansprechenden Konstruktionen finden reaktive Brandschutzsysteme eine stetig zunehmende Anwendung im Stahlbau. Durch ihre geringen Beschichtungsdicken ermöglichen die Brandschutzsysteme das Aufrechterhalten des filigranen Erscheinungsbilds der Stahlkonstruktionen bei gleichzeitiger Einhaltung der Brandschutzanforderungen. Während noch vor einigen Jahren die Anwendung der Brandschutzsysteme ausschließlich auf Druckstäbe und biegebeanspruchte Bauteile beschränkt war, haben aktuelle Forschungsarbeiten national zu einer Erweiterung des Anwendungsbereichs geführt. Da die Verwendbarkeit der reaktiven Brandschutzsysteme derzeit in Deutschland durch nationale und europäische Zulassungen geregelt ist, stehen den Herstellern unterschiedliche Optionen zur Verfügung, ihre Produkte dem Markt zugänglich zu machen. Im vorliegenden Artikel werden die Unterschiede der beiden Zulassungsmöglichkeiten aufgezeigt und eine Übersicht über die Nachweismöglichkeiten für mit reaktiven Brandschutzsystemen beschichteten Stahlbauteilen im Brandfall gegeben, die im Eurocode 3 Teil 1‐2 geregelt sind.
Fluorescence‐based sensor for selective and sensitive detection of amoxicillin (Amox) in aqueous medium: Application to pharmaceutical and biomedical analysis
Authors: Pawar Samadhan P. , Walekar Laxman S. , Gunjal Dattatray B. , Dalavi Dattatray K. , Gore Anil H. , Anbhule Prashant V. , Patil Shivajirao R. , Kolekar Govind B. 
Published: April 2017

AbstractWe here for the first time demonstrate an analytical approach for the highly selective and sensitive detection of amoxicillin (Amox) in aqueous medium based on the fluorescence quenching of quantum dots (QDs). The change in fluorescence intensity of mercaptopropionic acid‐capped cadmium sulphide (MPA‐CdS) QDs is attributed to the increasing concentration of Amox. The results show that the fluorescence quenching of QDs by Amox takes place through both static and dynamic types of quenching mechanism. The fluorescence quenching of QDs with increase in concentration of Amox shows the linear range between 5 μg ml−1 and 30 μg ml−1 and the limit of detection (LOD) is 5.19 μg ml−1. There is no interference of excipients, which are commonly present in pharmaceutical formulation and urine samples. For the practical application approach, the developed method has been successfully applied for the determination of Amox in pharmaceutical formulations and urine samples with acceptable results.
Highly sensitive HPLC method for the determination of galantamine in human plasma and urine through derivatization with dansyl chloride using fluorescence detector
Authors: Özdemir Elif , Tatar Ulu Sevgi 
Published: April 2017

AbstractA new method based on fluorescence derivatization with 5‐(dimethylamino) naphthalene‐1‐sulfonyl chloride (dansyl chloride) was developed for the quantitative determination of galantamine in human plasma and urine using high‐performance liquid chromatography. The reaction between galantamine and dansyl chloride was optimally realized in 30 min at room temperature and pH 10.5, with a reagent to galantamine molar ratio of 2.13. The derivative was extracted with dichloromethane, and the extract was dried under a nitrogen stream and dissolved in the mobile phase. Chromatographic analysis was performed with an Inertsil C18 column and a mobile phase comprising 40% acetonitrile and 60% 10 mM o‐phosphoric acid, 1.2 ml/min. The injection volume was 20 μl. The derivatives were detected with a fluorescence detector (excitation 375 nm/emission 537 nm). The retention time for the dansyl derivative of galantamine was 16.8 min. Linearity was observed between 125 and 2000 ng/ml in water, urine and plasma. The limit of detection and limit of quantification for the developed method were 6.27–70.99 and 18.81–212.97 ng/ml, respectively. Per cent recovery was calculated as 95.15 for urine and 95.78 for plasma. Interday repeatability values for urine and plasma samples (n = 6) at three different concentrations were calculated as a per cent relative standard deviation of 0.24–0.59 and 0.35–0.56. The corresponding per cent relative standard deviation values for intraday repeatability were 0.13–0.51 and 0.04–0.15, respectively.