gebhart/patrepeval huggingface dataset:
Chiral Organolanthanides Designed for Asymmetric Catalysis. A Kinetic and Mechanistic Study of Enantioselective Olefin Hydroamination/Cyclization and Hydrogenation by C1-Symmetric Me2Si(Me4C5)(C5H3R*)Ln Complexes where R* = Chiral Auxiliary (1994)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChiral Organolanthanides Designed for Asymmetric Catalysis. A Kinetic and Mechanistic Study of Enantioselective Olefin Hydroamination/Cyclization and Hydrogenation by C1-Symmetric Me2Si(Me4C5)(C5H3R*)Ln Complexes where R* = Chiral AuxiliaryMichael A. Giardello, Vincent P. Conticello, Laurent Brard, Michel R. Gagne, and Tobin J. MarksCite this: J. Am. Chem. Soc. 1994, 116, 22, 10241–10254Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue 1 November 1994https://pubs.acs.org/doi/10.1021/ja00101a048https://doi.org/10.1021/ja00101a048research-articleACS PublicationsRequest reuse permissionsArticle Views1720Altmetric-Citations309LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
MIDGUT VOLVULUS IN A PATIENT WITH ULCERATIVE COLITIS (2003)

s Submitted for the 68th Annual Scientific Meeting of the American College of Gastroenterology October 10-15, 2003, Baltimore, Maryland: CLINICAL VIGNETTES: PDF Only
Phase transition mastering for Blu-ray ROM disc (2003)

Recentry, the next generation optical disc system, Blu-ray disc system1) has been developed. The capacity of Blu-ray disc system is 25 GB with a 120 mm disc using 405 nm laser diode, 0.85 NA and 0.1 mm cover. The Blu-ray rewritable disc system will be soon in a market using a phase change medea for the application of high-definition video recording. As a derivertive system, Blu-ray ROM disc system is expected for the application of high-definition video contents distribution. The 25 GB Blu-ray ROM disc, however, can not be mastered using conventional mastering method.
A Focus Honoring Carol Robinson’s Election to the National Academy of Sciences (2018)

ADVERTISEMENT RETURN TO ISSUEResearch ArticleNEXTADDITION / CORRECTIONThis article has been corrected. View the notice.A Focus Honoring Carol Robinson's Election to the National Academy of SciencesJennifer S. BrodbeltJennifer S. BrodbeltDepartment of Chemistry, University of Texas at Austin, Austin, TX, USAMore by Jennifer S. Brodbelt and David H. RussellDavid H. RussellDepartment of Chemistry, Texas A&M University, College Station, TX, USAMore by David H. RussellCite this: J. Am. Soc. Mass Spectrom. 2019, 30, 1, 1–3Publication Date (Web):November 14, 2018Publication History Published online14 November 2018Published inissue 1 January 2019https://pubs.acs.org/doi/10.1007/s13361-018-2096-6https://doi.org/10.1007/s13361-018-2096-6research-articleACS PublicationsCopyright © 2018 © American Society for Mass Spectrometry 2018Request reuse permissionsArticle Views63Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts
Synthesis of 3,3-diarylpyrrolidines from diaryl ketones (2003)

3,3-Diarylsuccinic acids 4 were prepared from diaryl ketones by the Knoevenagel condensation with ethyl cyanoacete followed by KCN addition and hydrolysis. These were cyclised using primary amines to the respective diarylpyrrolidones 7, which were finally reduced to 3,3diarylpyrrolidines using BH 3 . THF.
Cross-Classification Clustering: An Efficient Multi-Object Tracking Technique for 3-D Instance Segmentation in Connectomics (2019)

Pixel-accurate tracking of objects is a key element in many computer vision applications, often solved by iterated individual object tracking or instance segmentation followed by object matching. Here we introduce cross-classification clustering (3C), a technique that simultaneously tracks complex, interrelated objects in an image stack. The key idea in cross-classification is to efficiently turn a clustering problem into a classification problem by running a logarithmic number of independent classifications per image, letting the cross-labeling of these classifications uniquely classify each pixel to the object labels. We apply the 3C mechanism to achieve state-of-the-art accuracy in connectomics - the nanoscale mapping of neural tissue from electron microscopy volumes. Our reconstruction system increases scalability by an order of magnitude over existing single-object tracking methods (such as flood-filling networks). This scalability is important for the deployment of connectomics pipelines, since currently the best performing techniques require computing infrastructures that are beyond the reach of most laboratories. Our algorithm may offer benefits in other domains that require pixel-accurate tracking of multiple objects, such as segmentation of videos and medical imagery.
Combinatorial Development of Sensing Materials (2010)

This chapter contains sections titled: Introduction General Principles of Combinatorial Materials Screening Opportunities for Sensing Materials Designs of Combinatorial Libraries of Sensing Materials Discovery and Optimization of Sensing Materials Using Discrete Arrays Optimization of Sensing Materials Using Gradient Arrays Emerging Wireless Technologies for Combinatorial Screening of Sensing Materials Summary and Outlook References
Response of Corn Hybrids to Nitrogen Fertilizer (1990)

Current economic pressure, combined with growing public concern over nitrates in groundwater, has resulted in increased interest in managing N fertilizer in corn ( Zea mays L.) production. The response of modern corn hybrids to N in a number of different field environments was investigated. Twelve elite hybrids were grown in 13 field environments and a number of other hybrids were evaluated in five additional environments. All locations were in the U.S. Corn Belt. Results indicated a statistically significant response of corn hybrid yield to N. The hybrids differed in average yield, however no consistent hybrid × N rate interaction was found in any of the experiments. This indicates that the hybrids responded to N in a similar way when averaged across the environments. While there may be differences in hybrid response in a particular type of environment, responses were not predictable across different weather patterns and soil types. Agronomic traits and leaf N were also measured and are discussed. Based on these findings, farmers should manage their N program in a similar manner for all hybrids, by efficiently applying an optimal rate of N and minimizing the possibility of nitrates leaching into groundwater.
Fabrication of Multi Color Polymer EL Devices using the Photo-bleaching Method. (2001)

Several kinds of multi color polymer EL devices were fabricated by means of the photo-bleaching method. Poly(N-vinylcarbazole)(PVK) was dispersed with photo-bleaching dopants having green or yellow fluorescent colors. In order to tune the emission Dolor and pattern the device, the PVK emitter layer was exposed to specific lights after formed by spin coating so that a specific dye is photo-bleached and becomes non-emissive. Green and blue (G-B), two color and yellow, green and blue (Y-G-B), three color devices were fabricated successfully.
Density Functional Theory-Assisted 31P and 23Na Magic-Angle Spinning Nuclear Magnetic Resonance Study of the Na3V2(PO4)2F3–Na3V2(PO4)2FO2 Solid Solution: Unraveling Its Local and Electronic Structures (2019)

The local and electronic structures of Na3V2(PO4)2F3–Na3V2(PO4)2FO2 electrode materials have been investigated by a combination of 23Na and 31P magic-angle spinning NMR spectroscopy and density functional theory calculations. The spin distributions and the 31P NMR Fermi contact shifts in these materials are calculated based on the projector augmented wave approach implemented in the VASP code. Upon oxygen substitution, V4+ ions are formed and involved in highly covalent vanadyl bonds. We show that they exhibit a very specific electronic structure with a single electron on the 3dxy orbital perpendicular to the bi-octahedra axis. The V3+ ions, on the other hand, exhibit a partial occupation of the t2g orbitals by two electrons. The peculiar electronic structure of the V ions is at the origin of the complex spin transfer mechanisms observed in the Na3V2(PO4)2F3–Na3V2(PO4)2FO2 materials and results in the existence of several 23Na and 31P MAS NMR resonances. Owing to the proper signal assignment achieved using DFT calculations, we could estimate the degree of oxygen substitution for fluorine in the materials and discuss the local distribution of V3+/V4+ ions. Furthermore, through the 31P NMR study on the Na3V2(PO4)2FO2 composition, we here demonstrate that a 31P NMR resonance close to 0 ppm can also be observed in paramagnetic materials if there is no proper orbital overlap for the electron spin transfer to occur.
Real-Time Microseismic Monitoring of Hydraulic Fracture Treatment: A Tool to Improve Completion and Reservoir Management (2007)

Abstract A considerable amount of gas is currently produced from unconventional Mississippian organic-rich shale gas fields such as the Barnett, the Fayetteville or the Bakken formations. Several tight-gas sand formations (e.g., Bossier, Cotton Valley, Lobo, Vicksburg, etc.) also provide valuable resources to be exploited. These formations are extremely low porosity and permeability reservoirs. They must be effectively and efficiently hydraulically fracture stimulated to produce at commercially economic production rates. Understanding the location and geometry of the created fractures and the area of pay affected by the fracture treatment is key to maximizing the value of the completion and reservoir management program. Technology has progressed to the point that microseismic monitoring of hydraulic fracture stimulation can efficiently provide extensive diagnostic information on fracture development and geometry. Furthermore, an acquisition system coupled to a real-time processing software linked to a fit-for-purpose visualization package enables true real-time microseismic monitoring of hydraulic fracture treatments. Firstly, this paper briefly discusses critical elements of a typical microseismic monitoring system including both hardware (e.g., quality of the downhole geophones, coupling to formation) and processing (e.g., velocity modeling, anisotropy). Secondly, we highlight some of the issues associated with manual picking of microseismic events and discuss an automatic processing technique that enables real-time determination of microseismic event locations. Thirdly, we discuss the value of real-time microseismic monitoring and the benefits it represents as an additional tool available to the stimulation engineer fracture analysis (e.g., hydraulic fracture containment, stage overlapping).
Beurteilbarkeit von Koronarstents mit der Flächendetektor CT: in-vitro Ergebnisse (2004)

Ziele: Die erschwerte Beurteilbarkeit von Koronarstents ist eine wesentliche Einschränkung der kardialen MSCT. Vorangegangene Studien haben unter anderem die örtliche Auflösung als limitierenden Faktor identifiziert. Ziel war es daher die Möglichkeiten der Flächendetektor-CT (FCT) mit optimierter örtlicher Auflösung und isotropen Voxeln für die Beurteilung von Koronarstents zu evaluieren. Methode: Acht verschiedene Koronarstents mit einem Durchmesser von jeweils 3mm wurden mit dem Prototypen eines F-CT (Siemens, Forchheim) untersucht und mit den Ergebnissen eines kommerziell erhältlichen 16-Schicht MSCT (Sensation 16, Siemens, Forchheim) verglichen. Die Bilder wurden jeweils mit einem Bildausschnitt von 100×100mm und einer 512×512 Bildmatrix unter Verwendung eines für die Stentdarstellung optimierten Rekonstruktionskern berechnet. Die effektive Schichtdicke betrug 0,2mm beim Flächendetektor CT und 1mm bei der 16-Schicht MSCT bei einem Rekonstruktionsinkrement von jeweils 0,2mm. Die Bildqualität wurde visuell mit einer 5-stufigen Skala verglichen. Das sichtbare Stentlumen wurde gemessen und mittels einer Multivarianzanalyse verglichen. Ergebnis: Die artifizielle Lumenreduktion war bei Verwendung der F-CT deutlich geringer als mit der MSCT. Die durchschnittliche artifizielle Lumenreduktion betrug hier 25% während sie in der MSCT bei 53% lag. Die visuell ermittelte Bildqualität der F-CT war deutlich besser als die der MSCT. Die F-CT erlaubte die Abgrenzung einzelner Stentstreben. Schlussfolgerung: Die F-CT ist der MSCT bei der Beurteilung von Koronarstents überlegen. Die verbesserte örtliche Auflösung erlaubt eine zuverlässige Beurteilung des Stentlumen.
Measurement of the cross-section and charge asymmetry of W bosons produced in proton–proton collisions at $$\sqrt{s}=8~\text {TeV}$$ with the ATLAS detector (2019)

Abstract This paper presents measurements of the $$W^+ \rightarrow \mu ^+\nu $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>W</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mi>ν</mml:mi></mml:mrow></mml:math> and $$W^- \rightarrow \mu ^-\nu $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>W</mml:mi><mml:mo>-</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>μ</mml:mi><mml:mo>-</mml:mo></mml:msup><mml:mi>ν</mml:mi></mml:mrow></mml:math> cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton–proton collisions at a centre-of-mass energy of 8 $$\text {TeV}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mtext>TeV</mml:mtext></mml:math> with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of $$20.2~\text{ fb }^{-1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>20.2</mml:mn><mml:mspace/><mml:mspace/><mml:mtext>fb</mml:mtext><mml:msup><mml:mspace/><mml:mrow><mml:mo>-</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> . The precision of the cross-section measurements varies between 0.8 and 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.
Canonical Training is Bad for Reconfigurable Intelligent Surfaces (2022)

Channel training in reconfigurable intelligent surfaces (RIS) is different from MIMO; in addition to pilots, it also requires setting RIS training states. Several RIS training schemes are studied in the literature, but the effect of training overhead and accuracy on capacity has not received the deserved attention. This is necessary for guiding the choice of RIS dimensionality and the parameters of modulation and coding. The present work fills this gap and shows that the spectral efficiency of RIS with DFT training (that uses the columns of DFT matrix for the RIS training states) is higher than that with the canonical training (that uses the canonical basis for RIS training states). Specifically, with 32 RIS elements, DFT training achieves a 2 bits/s/Hz gain compared to canonical training when the coherence interval is 150 time slots. Our results also reveal that beyond a certain critical RIS array size, further increase in size is not beneficial and that the optimal array size goes down with increase in SNR.
Phase locking of vortex based spin transfer oscillators to a microwave current (2011)

Phase locking experiments on vortex based spin transfer oscillators with an external microwave current are realized. We present clear evidence of synchronization, i.e., phase locking, frequency pulling, as well as fractional synchronization in this system with a minimum peak linewidth of only 3 kHz in the locked state. Large locking ranges are achieved (up to 1/3 of the oscillator frequency) allowing us to demonstrate the simultaneous phase locking of two independent oscillators connected in series with the external source.
Characterization of Hydrogels Made of a Novel Spider Silk Protein eMaSp1s and Evaluation for 3D Printing (2017)

Recombinantly produced spider silk proteins have high potential for bioengineering and various biomedical applications because of their biocompatibility, biodegradability, and low immunogenicity. Here, the recently described small spider silk protein eMaSp1s is assembled into hydrogels, which can be 3D printed into scaffolds. Further, blending with a recombinantly produced MaSp2 derivative eADF4(C16) alters the mechanical properties of the resulting hydrogels. Different spider silk hydrogels also show a distinct recovery after a high shear stress deformation, exhibiting the tunability of their features for selected applications.
Fluorinated Vesicles (1994)

Stable fluorinated vesicles--i.e. vesicles with a hydrophobic and lipophobic fluorinated film within their bilayer membranes--have been obtained from a variety of neutral, zwitterionic or anionic fluorinated amphiphiles, including single chain phosphocholine derivatives, double-chain phospholipids, glycolipids and glycophospholipids, as well as from combinations of standard phospholipids with amphiphilic mixed fluorocarbon/hydrocarbon compounds. The strong hydrophobic interactions developed by perfluoroalkyl chains result in increased membrane stability, as strikingly illustrated by the fact that even short single-chain fluorinated amphiphiles can form stable, heat-sterilizable vesicles without the need for any additive. They also result in increased versatility in the aggregation behavior of fluorinated surfactants, as shown by the formation, depending on molecular structure and experimental conditions, of a range of supramolecular assemblies other than vesicles, including disks, helical tubules and fibers, for example from fluorinated glycolipids. The more impermeable, adjustable fluorinated core within the liposomal membrane confers to liposomes added drug and probe encapsulation stability as compared to their hydrogenated analogs, whether in buffer or in serum. Fluorinated vesicles made from perfluoroalkylated phospholipids were also found to have 3 to 6 times longer circulation half-lives in mice than similarly sized conventional DSPC/cholesterol liposomes. Finally, the incorporation of mixed fluorocarbon/hydrocarbon alkanes or alkenes into standard liposomes may provide an alternative, straightforward and cost efficient approach to fluorinated vesicles.
Gut microbiota bacterial strain richness is species specific and limits therapeutic engraftment (2022)

Abstract Despite the fundamental role of strain variation in gut microbiota function, the number of unique strains of a species that can stably colonize the human gut is still unknown. In this work, we determine the strain richness of common gut species using thousands of sequenced bacterial isolates and metagenomes. We find that strain richness varies across species, is transferable by fecal microbiota transplantation, and is low in the gut compared to other environments. Therapeutic administration of supraphysiologic numbers of strains per species only temporarily increases recipient strain richness, which subsequently converges back to the population average. These results suggest that properties of the gut ecosystem govern the number of strains of each species colonizing the gut and provide a theoretical framework for strain engraftment and replacement in fecal microbiota transplantation and defined live biotherapeutic products.
Assessment of health claims in the field of bone: a view of the Group for the Respect of Ethics and Excellence in Science (GREES) (2011)

The consensus reached is that the level of health claim may differ according to the surrogate endpoint used and on additional animal studies provided to support the claim.
Supplementary Table 2 from Network Analysis Identifies an HSP90-Central Hub Susceptible in Ovarian Cancer (2023)

&lt;p&gt;XLSX file - 22KB, Table of 130 proteins in expanded sensitization network with reported drug inhibitors, based on data reported in DrugBank and Ingenuity.&lt;/p&gt;
A Self-Paired Comparison of Perioperative Outcomes Before and After Implementation of a Clinical Pathway in Patients Undergoing Total Knee Arthroplasty (2013)

Our findings demonstrated that the use of a standardized clinical pathway reduced hospital LOS, improved clinical outcomes and patient satisfaction while reducing costs for identical surgical procedures.
Hydroxylation of Indole by PikC Cytochrome P450 from Streptomyces venezuelae and Engineering Its Catalytic Activity by Site-Directed Mutagenesis (2006)

The cytochrome P450 monooxygenase from the pikromycin biosynthetic gene cluster in Streptomyces venezuelae, known as PikC, was observed to hydroxylate the unnatural substrate indole to indigo. Furthermore, the site-directed mutagenesis of PikC monooxygenase led to the mutant enzyme F171Q, in which Phe171 was altered to Gln, with enhanced activity for the hydroxylation of indole. From enzyme kinetic studies, F171Q showed an approximately five-fold higher catalytic efficiency compared with the wild-type PikC. Therefore, these results demonstrate the promising application of P450s originating from Streptomyces, norinally involved in polyketide biosynthesis, to generate a diverse array of other industrially useful compounds.