gebhart/patrepeval huggingface dataset:
Inverse gas chromatography studies of poly(dimethylsiloxane)-polycarbonate copolymers and blends (1981)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInverse gas chromatography studies of poly(dimethylsiloxane)-polycarbonate copolymers and blendsT. C. Ward, D. P. Sheehy, J. E. McGrath, and J. S. RiffleCite this: Macromolecules 1981, 14, 6, 1791–1797Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published inissue 1 November 1981https://pubs.acs.org/doi/10.1021/ma50007a035https://doi.org/10.1021/ma50007a035research-articleACS PublicationsRequest reuse permissionsArticle Views202Altmetric-Citations36LEARN 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
Luciferine, bioluminescierende Substanzen (1968)

Die Bioluminescenz des amerikanischen Leuchtkäfers Photinus beruht auf der Reaktion von 2-(6-Hydroxybenzthiazol-2-yl)-Δ2-1,3-thiazolin-4-carbonsäure („Photinus-Luciferin”︁) mit dem Enzym Luciferase in Gegenwart von ATP und Magnesium-Ionen. Im Muschelkrebs Cypridina wird die Bioluminescenz dagegen durch die Reaktion einer Luciferase mit 8-(3-Guanidino-propyl)-6-indol-3-yl-2-(1-methyl-propyl)-3,7-dihydroimidazo[1,2-a]-pyrazin-3-on („Cypridina-Luciferin”︁) hervorgerufen. Latia-Luciferin ist 1,3,3-Trimethyl-2-(4-formyloxy-3-methyl-3-butenyl)-1-cyclohexen. Das Luciferin der Federkoralle Renilla ist ein noch nicht genau identifiziertes Tryptaminderivat; die Luciferine anderer leuchtender Organismen sind noch unbekannt. — Vorstellungen über den Ablauf der Luciferin-Luciferase-Reaktion und zahlreiche Spektren runden diese Übersicht ab.
An Experimental Investigation of the Patterns of International Trade (2001)

AbstractThis paper studies a laboratory economy with some of the prominent features of an international economic system. The patterns of trade and output predicted by the law of comparative advantage are observed evolving within the experimental markets. Market prices and quantities move in the direction of the competitive equilibrium, but the quantitative predictions of the (risk-neutral) competitive equilibrium are rejected. Considerable amounts of economic activity occur as disequilibria. Factor-price equalization is observed, but there is a universal tendency for factors of production to trade at prices below their marginal products.
Spasmolytic Effect of the NK2-Receptor-Selective Antagonist MEN 10,627 in Rat Small Intestine (1994)

The effect of activation of tachykinin NK2-receptors on gastrointestinal propulsion was studied in vivo in conscious rats. The selective NK2-receptor agonist [βAla8]NKA-(4-10) produced an atropine-resistant specific increase of the small intestinal transit measured by the charcoal method. This effect was restricted to the small intestine since gastric emptying was not affected by [βAla8]NKA-(4-10). The newly developed polycyclic peptide NK2-receptor antagonist MEN 10,627 produced a dose-dependent inhibition of this stimulated transit. The spasmolytic effect of MEN 10,627 was highly selective because it did not affect stimulated intestinal transit induced by equieffective doses of carbachol and reserpine. These findings indicate that MEN 10,627 is a valuable tool for assessing the role of NK2-receptors in intestinal propulsive activity.
Drain-voltage dependency of memory effects in W-CDMA base station digital predistortion linearizers with compound semiconductor power amplifiers (2005)

With regard to wideband predistortion type power amplifiers, such as shared amplifiers used in W-CDMA base stations, the memory effects associated with RF power amplifiers degrade power efficiency. Aiming to solve this problem, we find that a high-voltage compound semiconductor device has sufficient ACLR performance to mitigate these memory effects. We tested two kinds of compound-semiconductor devices, namely, a GaAs FET and a GaN HEMT. The GaAs FET, with an operating voltage (Vop) of 12 V, a saturation output of 240 W, and a push–pull configuration, was used as a low-voltage device. The GaN HEMT, with Vop of 50 V, a saturation output of 200 W, and a push–pull configuration as well, was used as a high-voltage device. The test results for these devices in a predistortion linearizer configuration show that the high-voltage device (the GaN HEMT) achieved excellent characteristics in terms of distortion suppression and drain efficiency in four-carrier W-CDMA applications. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 551–554, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20876
Pretreatment with Intravitreal Triamcinolone before Laser for Diabetic Macular Edema: 6-Month Results of a Randomized, Placebo-Controlled Trial (2010)

Visual results and the need for further laser treatment at 6 months were no better in the IVTA group than in the laser-alone group, despite a better anatomic outcome reflected by reduction in mean central macular thickness. This study found no evidence of a synergistic effect of IVTA and laser photocoagulation for DME. (ClinicalTrials.gov number, NCT00148265).
Synthesis and Characterization of 2,6-Di(quinolin-8-yl)pyridines. New Ligands for Bistridentate RuII Complexes with Microsecond Luminescent Lifetimes (2007)

The synthesis of 4-substituted and 4-aryl-substituted 2,6-di(quinolin-8-yl)pyridines is described. The tridentate ligands were prepared via a palladium-catalyzed Suzuki-Miyaura cross-coupling reaction or via a one-step ring-forming reaction generating the central pyridine ring. X-ray crystal structures and 1H NMR shifts are discussed and compared to the corresponding data for a RuII bistridentate complex. Intramolecular stacking of two quinoline units in the RuII complex is suggested by 1H NMR data and also observed in the X-ray structure.
Stored Waveform Inverse Fourier Transform (SWIFT) (2016)

This document contains recommendations for terminology in mass spectrometry. Development of standard terms dates back to 1974 when the IUPAC Commission on Analytical Nomenclature issued recommendations on mass spectrometry terms and definitions. In 1978, the IUPAC Commission on Molecular Structure and Spectroscopy updated and extended the recommendations and made further recommendations regarding symbols, acronyms, and abbreviations. The IUPAC Physical Chemistry Division Commission on Molecular Structure and Spectroscopy’s Subcommittee on Mass Spectroscopy revised the recommended terms in 1991 and appended terms relating to vacuum technology. Some additional terms related to tandem mass spectrometry were added in 1993 and accelerator mass spectrometry in 1994. Owing to the rapid expansion of the field in the intervening years, particularly in mass spectrometry of biomolecules, a further revision of the recommendations has become necessary. This document contains a comprehensive revision of mass spectrometry terminology that represents the current consensus of the mass spectrometry community.
Les bases de données tribologiques (2002)

Une base de données tribologiques a été développée avec 15 000 fichiers. Celte base stocke les données dans un format uniforme et permet ainsi de consulter à la fois des données existantes pour rechercher des solutions et/ou des données sur le comportement d'un couple spécifique. La base de données met les utilisateurs dans la position de rechercher d'une manière simple et rapide des matériaux potentiels et d’obtenir des données fiables sur le comportement tribologique de matériaux, revêtements et lubrifiants dans un tribosystème fermé. Elle répond aux besoins des consultants, scientifiques, bureaux d'études, projeteurs et ingénieurs, ainsi qu’à ceux des producteurs de matériaux et revêtements. Tous les paramètres sont normalisés et peuvent être comparés, puisqu'ils sont stockés dans le même format. L'étendue de la base couvre un très grand nombre de tribomètres et bancs d'essais en utilisation
Subband processing of finite length signals without border distortions (1992)

New equations are derived for the perfect reconstruction of the boundary regions of a subband processed image. These equations are valid for filter banks with an arbitrary number of filters, having arbitrary nonlinear phase, and allowing any border extension method in the analysis section. The filter bank is maximally decimated in a wide sense, i.e., the sum of samples among the subbands is equal to the sum of the image samples, without having to store extended subband signals.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Nano contact formation in a simple mems device for the conductance measurements of nano objects (2005)

In this paper we propose a method for formation of nano contacts between metallic ,nano wires for conductance measurement of nano scale objects. Nan0 scale lateral displacement of cantilevers during vertical motion is used to bring two parallel nano wires in to contact. This method is advantageous not only because of its simplicity but also it is capability of controlling extremely small lateral displacements (10s of nm) by using large vertical displacement (few microns). Ohmic behavior between wires is confirmed at room temperature I-V measurements. By comparing the measured resistance with a nano wire having similar dimensions, contact resistance between wires is estimated.
ChemInform Abstract: New Radical Allylation Reaction. (1996)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Joint sampling-time error and channel skew calibration of time-interleaved ADC in multichannel fiber optic receivers (2012)

A joint sampling-time error and channel skew background calibration technique for time interleaved analog to digital converters (TI-ADC) is presented. The technique is aimed at applications in dual-polarization QPSK/QAM receivers for coherent optical communications at high data rates (e.g., 40Gb/s and beyond). Unlike previous proposals, the calibration algorithm introduced here is used to jointly compensate for sampling-time and channel skew errors. Estimates of the gradient of the mean squared error (MSE) or the bit error rate (BER) with respect to the sampling phases of the different signal lanes and interleaves are computed and used to iteratively minimize a cost function (i.e., MSE or BER). Computer simulations demonstrate the excellent behavior of the proposed compensation technique. The calibration algorithm can be implemented with minimal hardware requirements and with a slow clock. This allows power dissipation in a CMOS VLSI implementation to be minimized.
Supramolecular Structures of Inclusion Complexes of C70 and Cyclic Porphyrin Dimers (2011)

Abstract Cyclic nickel and free-base porphyrin dimers (Ni2-CPDPy and H4-CPDPy) include fullerene C70 both in solution and in the crystals. Based on the 13C NMR spectra in solution, the included C70 molecule inside the cavity of Ni2-CPDPy shows both end-on and side-on orientations, whereas the C70 molecule within H4-CPDPy has only a side-on orientation toward the porphyrin rings. X-ray crystallography revealed both “end-on” and “side-on” orientations of C70 in the crystal structure of the inclusion complex of Ni2-CPDPy and C70. This is the first example of an X-ray crystallographic determination for an end-on orientation of C70 cocrystallized with porphyrins. On the other hand, only a side-on orientation of C70 was observed in the crystal structure of the complex of H4-CPDPy and C70. Further, a zigzag array of C70 molecules through van der Waals contacts with each other is formed along the monoclinic b axis in the latter crystal.
A novel approach to the antimicrobial activity of maggot debridement therapy (2010)

The TAST results did not reveal any highly secreted compounds with putative antimicrobial activity, implying an alternative antimicrobial activity of MDT. Lucifensin showed antimicrobial activities comparable to other defensins and could have potential as a future drug candidate scaffold, for redesign for other applications besides the topical treatment of infected wounds.
High Duty Cycle (HDC) sonar processing interval and bandwidth effects for the TREX'13 dataset (2015)

Unlike conventional Pulsed Active Sonar (PAS), which listens for target echoes in between short-burst transmissions, High Duty Cycle (HDC) sonar attempts to detect echoes amidst the continual interference from source(s) transmitting with nearly 100% duty cycle. HDC sonar presents an additional processing parameter, not available with PAS, which is the processing interval. The processing interval is a selectable subset of time within a CAS repetition cycle used for coherent processing. Hence, the choice of processing interval may be used to tune the performance of the sonar to local environmental conditions and to the operational scenario. Theoretically, increasing the processing interval increases target detectability, but in practice other factors should also be considered. In real acoustic environments, sound propagation is subject to temporal and spectral spreading effects, and these may limit the processing gains to lower levels than expected. Target Doppler can also become a more significant issue with longer processing intervals. Shorter processing intervals provide an increased number and rate of detection opportunities, which can be a significant advantage, leading to improved target holding, localization, tracking, and classification. This paper describes the various expected effects of the processing interval on performance for continuous-time LFM signals. It presents an analysis conducted on the TREX'13 sea trial dataset, and shows various results achieved as a function of processing interval. The results are explained and compared with theoretical expectations, and show the complicating effects of a real acoustic environment. In particular, we see the limitation on performance gains with increasing the processing interval due to acoustic environmental spreading effects, the target's physical extent and Doppler effects. Comparisons are shown between echoes from three different targets: mobile compact, mobile extended, and fixed. The evaluation describes performance using the quantities of Received Level, SNR, echo time-extent, and delay bias.
Energy Efficiency of Rate-Splitting Multiple Access for Multibeam Satellite System (2023)

Energy efficiency (EE) problem has become an important and major issue in satellite communications. In this paper, we study the beamforming design strategy to maximize the EE of rate-splitting multiple access (RSMA) for the multibeam satellite communications by considering imperfect channel state information at the transmitter (CSIT). We propose an expectation-based robust beamforming algorithm against the imperfect CSIT scenario. By combining the successive convex approximation (SCA) with the penalty function transformation, the nonconvex EE maximization problem can be solved in an iterative manner. The simulation results demonstrate the effectiveness and superiority of RSMA over traditional space division multiple access (SDMA). Moreover, our proposed beamforming algorithm can achieve better EE performance than the conventional beamforming algorithm.
Cardiac Image Registration: Rotational Error Correction and Gated Stabilization for Cardiac Motion. (2011)

<b>Background:</b> Dynamic motion of the heart due to cardiac and respiratory cycles, and rotation from varying patient positions between imaging modalities, can cause errors during cardiac image registration. This study used phantom, patient and animal models to assess and correct these errors. <b>Methods and Results:</b> Rotational errors were identified and corrected using different phantom orientations. ECG-gated fluoro images were aligned with similarly gated CT images in 9 patients, and accuracy assessed during atrial fibrillation (AF) and sinus rhythm. A tracking algorithm corrected errors due to respiration; 4 independent observers compared 25 respiration sequences to an automated method. Following correction of these errors, target registration error was assessed. At 20 mm and 30 mm from the phantom model's center point with an in-plane rotation of 8 degrees, measured error was 2.94 mm and 5.60 mm, respectively, and the main error identified. A priori method accurately predicted ECG location in only 38% (p=0.0003) of 313 R-R intervals in AF. A posteriori method accurately gated the ECG during AF and sinus rhythm in 97% and 98% of 375 beats evaluated, respectively (p=NS). Tracking algorithm for ECG-gated motion compensation was identified as good or fair 96% of the time, with no difference between observers and automated method (chi-square=25; p=NS). Target registration error in phantom and animal models was 1.75±1.03 mm and 0 to 0.5 mm, respectively. <b>Conclusions:</b> Errors during cardiac image registration can be identified and corrected. Cardiac image stabilization can be achieved using ECG gating and respiration.
Antisense oligonucleotide-mediated Dnm2 knockdown prevents and reverts myotubular myopathy in mice (2017)

Centronuclear myopathies (CNM) are non-dystrophic muscle diseases for which no effective therapy is currently available. The most severe form, X-linked CNM, is caused by myotubularin 1 (MTM1) loss-of-function mutations, while the main autosomal dominant form is due to dynamin2 (DNM2) mutations. We previously showed that genetic reduction of DNM2 expression in Mtm1 knockout (Mtm1KO) mice prevents development of muscle pathology. Here we show that systemic delivery of Dnm2 antisense oligonucleotides (ASOs) into Mtm1KO mice efficiently reduces DNM2 protein level in muscle and prevents the myopathy from developing. Moreover, systemic ASO injection into severely affected mice leads to reversal of muscle pathology within 2 weeks. Thus, ASO-mediated DNM2 knockdown can efficiently correct muscle defects due to loss of MTM1, providing an attractive therapeutic strategy for this disease.
Pattern of Cardiorespiratory Afferent Convergence to Solitary Tract Neurons Driven by Pulmonary Vagal C-Fiber Stimulation in the Mouse (1998)

The central integration of signals from pulmonary vagal C-fibers (or type-J receptors) with those arising from cardiac, peripheral chemoreceptor, and baroreceptor afferents to neurons within the nucleus of the solitary tract (NTS) was studied in an arterially perfused working heart-brain stem preparation of adult mouse. Pulmonary vagal C-fibers were excited by right atrial injection of phenylbiguanide (PBG) while cardiac receptors were stimulated by left ventricular injection of veratridine (1-3 micrograms/kg) or mechanically by distension of the left ventricle (20-50 microl perfusate) using an indwelling cannula. Carotid body chemoreceptors were activated by aortic injection of Na cyanide, whereas baroreceptors were stimulated by increasing arterial perfusion pressure. Stimulation of pulmonary C-fibers and cardiac, chemo-, and baroreceptors all produced a reflex bradycardia (23-133 bpm). Central respiratory activity, as recorded from the phrenic nerve, was depressed by stimulating pulmonary C-fibers and cardiac and baroreceptors but enhanced in amplitude and frequency during chemoreceptor stimulation. Twenty-seven NTS neurons were excited and three were inhibited after pulmonary C-fiber stimulation displaying decrementing discharges with a peak firing frequency of up to 42 Hz (15 +/- 2.2 Hz, mean +/- SE) that lasted for 8.8 +/- 0.9 s. These responses occurred <1 s from the end of the PBG injection that was within the pulmonary circulation time. None of these cells responded to increases in right atrial pressure. All cells excited by PBG were also driven synaptically after electrical stimulation of the ipsilateral cervical vagus nerve at a latency of 32.9 +/- 3.2 ms (range 20-62 ms). None of these neurons had ongoing activity related to central respiratory activity. Convergence from cardiorespiratory afferents to 21 neurons driven by pulmonary C-fibers was tested. Twenty-five percent of cells were selectively excited by chemical stimulation of cardiac receptors alone, 19% were driven by peripheral chemoreceptors, and 38% responded to both cardiac and chemoreceptor activation. In contrast, only 13% of the cells activated by PBG injection responded to stimulation of baroreceptors and only 6% to cardiac mechanoreceptor stimulation. None of these neurons were activated by increasing right atrial pressure. The data indicate a high proportion of afferent convergence from pulmonary C-fibers, cardiac receptors, and peripheral chemoreceptors in the NTS. However, these neurons appear not to integrate inputs from cardiovascular mechanoreceptors. The significance of the data is discussed in relation to pathological disease states such as pulmonary congestion and cardiac failure.
In-Situ Contamination Monitoring and GOR Measurement of Formation Fluid Samples (2002)

Abstract Formation fluid sampling early in the life of a well ensures that vital information is available for timely input to field planning decisions. Particularly in subsea wells, flow assurance is a major concern, and formation fluid samples from openhole logging help operators optimize investment in both upstream and downstream facilities. Oils have different color due to the amount of large, complex aromatic compounds they contain. Since synthetic and oil-base drilling muds contain simple aliphatic compounds, they absorb little in the shorter wavelength color channels. The Oil-Base Contamination Monitoring (OCM) technique uses optical means to monitor the buildup of color during sampling. The technique provides real-time analysis of sample contamination, as well as prediction of how long it will take to achieve an acceptably low level of contamination. As reservoir fluid replaces filtrate in the flow line, the optical density (OD) of the methane signal also increases, in proportion to the oil's methane content. Methane detection is essential for condensates and for lightly colored crude oils. For such fluids, the color buildup becomes difficult to detect; however, the high methane content of these fluids makes possible a reliable methane-based OCM algorithm. Furthermore, the methane content can be used to determine the gas/oil ratio (GOR) of the sample. When these methane-based techniques are applied for darker oils, the color absorption of the crude extends to the near infrared region and covers the methane molecular vibration peak, resulting in a higher methane signal optical magnitude. If uncorrected for, this would result in errors in the methane-based contamination prediction and GOR determination. In this paper, we show how to measure GOR downhole during sampling using the OD of the methane signal. We also describe a decolorization algorithm to remove the color effect from the methane optical channel. The algorithm is based on the exponential decay of color absorption toward the high wavelengths in the near infrared region. After decolorization, the methane channel contains only methane molecular vibration absorption, which is then used to derive an accurate crude oil contamination value and GOR.