gebhart/patrepeval huggingface dataset:
Circularly Polarized Transmitarray Antenna for CubeSat Intersatellite Links in <i>K</i>-Band (2020)

A circularly polarized transmitarray antenna based on aperture-coupled patches is presented for CubeSat intersatellite-link applications in K-band. The concept of aperture coupling simplifies the design of transmitarray elements, as it omits the need for metallized vias. Compared to a five-layer element geometry previously proposed in the literature, the total number of metallic layers is reduced to three metallic layers, as a result of a simple modification in the shape of the crossed coupling slot. The new element has a total profile of 0.13 λ0 at 24.6 GHz and exhibits a stable performance over a range of incidence angles. The element is incorporated in a 900-element offset-fed transmitarray antenna. The antenna prototype exhibits a gain of 31.6 dBi with a maximum efficiency of 57% and a 1 dB gain bandwidth of 5.7%. The measured axial ratio is below 0.6 dB across the entire gain bandwidth.
The Ulp2 SUMO Protease Is Required for Cell Division following Termination of the DNA Damage Checkpoint (2007)

Eukaryotic genome integrity is maintained via a DNA damage checkpoint that recognizes DNA damage and halts the cell cycle at metaphase, allowing time for repair. Checkpoint signaling is eventually terminated so that the cell cycle can resume. How cells restart cell division following checkpoint termination is poorly understood. Here we show that the SUMO protease Ulp2 is required for resumption of cell division following DNA damage-induced arrest in Saccharomyces cerevisiae, although it is not required for DNA double-strand break repair. The Rad53 branch of the checkpoint pathway generates a signal countered by Ulp2 activity following DNA damage. Interestingly, unlike previously characterized adaptation mutants, ulp2Delta mutants do not show persistent Rad53 phosphorylation following DNA damage, suggesting checkpoint signaling has been terminated and no longer asserts an arrest in these cells. Using Cdc14 localization as a cell cycle indicator, we show that nearly half of cells lacking Ulp2 can escape a checkpoint-induced metaphase arrest despite their inability to divide again. Moreover, half of permanently arrested ulp2Delta cells show evidence of an aberrant mitotic spindle, suggesting that Ulp2 is required for proper spindle dynamics during cell cycle resumption following a DNA damage-induced cell cycle arrest.
The mechanism for the oxidative polymerization of <i>p</i>‐phenylenediamine in aqueous solution of iron chelate (1970)

Abstract p ‐Phenylenediamine (PD) was oxidatively polymerized in an aqueous solution of iron chelates, e.g. , the Fe(III)‐salt of ethylenediaminetetraacetic acid; poly(azophenylene) was formed as a black powder. The ferric chelate is effective for the polymerization, and the polymer yield is proportional to the oxygen consumption. As a rule, the rate of polymerization reaches a maximum at pH 7–8. The electrochemical potential of the system changes rapidly during the initial stage of the polymerization and reaches an equilibrium value within several minutes. This shows that the polymerization proceeds while the equilibrium of ferric and ferrous chelates is maintained. The mechanism of the polymerization is considered to involve an equimolar coordination of the unprotonated species of PD to the ferric chelate, thus forming a mixed complex. PD is activated by electron transfer to the ferric ion which is thereby reduced to the ferrous ion, and the activated PD molecules couple with each other. The ferrous chelate is then oxidized by oxygen to the ferric chelate and may act as a catalyst again. The rate‐determining step of the polymerization is the oxidation reaction of ferrous to ferric chelate by oxygen. However, the rate of the polymerization is also affected by the equilibrium between the iron chelate and PD in the polymerization system.
NEPH2 Is Located at the Glomerular Slit Diaphragm, Interacts with Nephrin and Is Cleaved from Podocytes by Metalloproteinases (2005)

The NEPH family comprises three transmembrane proteins of the Ig superfamily interacting with the glomerular slit diaphragm proteins podocin and ZO-1. NEPH1 binds to nephrin, another component of the slit diaphragm, and loss of either partner causes heavy proteinuria. NEPH2, which is strongly conserved among a large number of species, is also expressed in the kidney; however, its function is unknown. The authors raised NEPH2 antisera to demonstrate NEPH2 expression in a variety of mouse tissues, including the kidney and a podocyte cell line. The authors localized the expression of NEPH2 to the glomerular slit diaphragm by electron microscopy and show NEPH2 homodimerization and specific interactions with the extracellular domain of nephrin in vitro and in vivo. NEPH1, however, failed to interact with NEPH2. The authors detected immunoreactive NEPH2 in urine of healthy subjects, suggesting that the extracellular domain is cleaved under physiologic conditions. These findings were confirmed in vitro in podocyte cell culture. Shedding is increased by tyrosine phosphatase inhibitors and diminished by GM6001, an inhibitor of metalloproteinases. Overexpression experiments indicate an involvement of the MT1-matrix metalloproteinase. The results suggest a role for NEPH2 in the organization and/or maintenance of the glomerular slit diaphragm that may differ from the functions of NEPH1 and nephrin.
Status of the W.M. Keck Adaptive Optics Facility (1998)

We will review the status of the natural/laser guide star adaptive optics facility that is being constructed for the Keck II telescope.
Wavefront Aberration Measurements of the Human Eye. (2001)

Wavefront sensing in the human eye recently has been extensively studied, because Liang used a Hartmann-Shack wavefront sensor to successfully measure the aberrations in the human eye. In this article, the basicmethods of a Hartmann-Shack wavefront sensor for the eye and several clinical applications will be described. The benefits of wavefront sensing will be observed in many clinical situations, such as in patients with keratoconusor cataract and in those undergoing intraocular lens implantation or corneal refractive surgery.
ANISOTROPIE DES CORRÉLATIONS DE POSITION DANS LE TELLURE LIQUIDE (1971)

La structure locale du tellure liquide est le résultat d'une compétition entre : - des effets de potentiel, qui favorisent des configurations locales assez anisotropes - des effets entropiques, qui stabilisent des configurations plus isotropes. A basse température (liquide surfondu), les effets de potentiel dominent, et imposent des interactions fortement anisotropes entre les atomes du liquide. La structure locale est caractérisée par des corrélations fortes avec 2 voisins seulement, et faibles avec 4 autres. On observe donc une tendance des corrélations à être plutôt unidimensionnelles ; dans la limite (hypothétique) des basses températures, cette tendance aboutirait à la formation de chaînes. A des températures plus élevées, on assiste à un branchement progressif des chaînes, qui conduit à la formation d'une structure localement bidimensionnelle ; plus précisément, on a des interactions fortes avec 3 plus proches voisins définissant localement un feuillet, faibles avec 3 autres appartenant au feuillet voisin. Cette structure est dominante dans toute la gamme de températures où le liquide est stable. Enfin à très haute température, les corrélations deviennent encore plus isotropes : chaque atome a sa première sphère de coordination formée de 6 voisins équidistants (configuration cubique simple). Ces transformations sont évidemment liées à une augmentation de l'entropie (c. a. d. du désordre) du liquide, mais la nature de ce désordre n'est pas claire au premier abord. Une analyse en modes du désordre du liquide montre que l'évolution en température de l'entropie est dominée par les modes à très courte longueur d'onde (essentiellement des cisaillements locaux). De ce point de vue, le problème est assez semblable à celui du désordre de vibration dans certains semi-métaux solides (étain gris par exemple), et pourrait être interprété d'une manière plus quantitative par un calcul des constantes élastiques et des énergies de cohésion pour les différentes configurations locales.
Steroid recognition and engineering of catalysis in mammalian aldo-keto reductases (1998)

Of the steroid transforming aldo-keto reductases (AKRs), rat liver 3$\\alpha$-hydroxysteroid dehydrogenase (3$\\alpha$-HSD) is the best studied and provides a model for understanding protein-steroid interactions. Initially the location of the steroid binding site in rat liver 3$\\alpha$-HSD was unknown. Through site-directed mutagenesis of the tryptophans in 3$\\alpha$-HSD and analysis of the mutants by steady-state kinetics and protein fluorescence, we proposed that Trp86 and Trp227 form opposite sides of the binding site. Based on this study, a model for steroid binding in 3$\\alpha$-HSD was proposed and subsequently confirmed when the structure of the 3$\\alpha$-HSD$\\cdot$NADP$\\sp+\\cdot$testosterone ternary complex was determined. This model may be applicable to other steroid transforming AKRs, including other 3$\\alpha$-, 17$\\beta$-, and 20$\\alpha$-HSDs and the $\\Delta\\sp4$-3-ketosteroid-5$\\beta$-reductases. Using both structural and sequence comparisons as a guide, $\\Delta\\sp4$-3-ketosteroid-5$\\beta$-reductase activity was engineered into rat liver 3$\\alpha$-HSD by mutating His117 of the catalytic tetrad into a glutamic acid. Our results demonstrate that the AKRs use the same general acid (Tyr55) for catalyzing the reduction of both ketones and carbon-carbon double bonds. The identity of amino acid 117 can determine if an AKR functions as an oxidoreductase and/or a double bond reductase. This result has implications for how Nature evolves new enzymatic activities. In endocrine target tissues, 3$\\alpha$-HSD may function as a molecular switch by interconverting active steroid hormones with their cognate inactive metabolites. We cloned, expressed, and characterized the type 2 3$\\alpha$-HSD isoform from a human prostate cDNA library. The identification of dual 3$\\alpha$-/17$\\beta$-HSD activity in this enzyme demonstrates that the steroid binding site accommodates substrate in two orientations. Also, the bifunctional activity allows this enzyme to remove the potent androgen 5$\\alpha$-DHT from the prostatic androgen pool. However, it cannot catalyze the formation of 5$\\alpha$-DHT and does not act as a molecular switch. This work suggests that different 3$\\alpha$-HSD isoforms may have distinct roles in controlling androgen levels in the prostate.
Chitosan-Enriched Solution Blow Spun Poly(Ethylene Oxide) Nanofibers with Poly(Dimethylsiloxane) Hydrophobic Outer Layer for Skin Healing and Regeneration (2022)

Chitosan (CS)/poly(ethylene oxide) (PEO)-based nanofiber mats have attracted particular attention as advanced materials for medical and pharmaceutical applications. In the scope of present studies, solution blow spinning was applied to produce nanofibers from PEO and CS and physicochemical and biopharmaceutical studies were carried out to investigate their potential as wound nanomaterial for skin healing and regeneration. Additional coating with hydrophobic poly(dimethylsiloxane) was applied to favor removal of nanofibers from the wound surface. Unmodified nanofibers displayed highly porous structure with the presence of uniform, randomly aligned nanofibers, in contrast to coated materials in which almost all the free spaces were filled in with poly(dimethylsiloxane). Infrared spectroscopy indicated that solution blow technique did not influence the molecular nature of native polymers. Obtained nanofibers exhibited sufficient wound exudate absorbency, which appears beneficial to moisturize the wound bed during the healing process. Formulations displayed greater tensile strength as compared to commercial hydrofiber-like dressing materials comprised of carboxymethylcellulose sodium or calcium alginate, which points toward their protective function against mechanical stress. Coating with hydrophobic poly(dimethylsiloxane) (applied to favor nanofiber removal from the wound surface) impacted porosity and decreased both mechanical properties and adherence to excised human skin, though the obtained values were comparable to those attained for commercial hydrofiber-like materials. In vitro cytotoxicity and irritancy studies showed biocompatibility and no skin irritant response of nanofibers in contact with a reconstituted three-dimensional human skin model, while scratch assay using human fibroblast cell line HDFa revealed the valuable potential of CS/PEO nanofibers to promote cell migration at an early stage of injury.
In vitro degradation kinetics of four carbohydrates using ileal and faecal inocula from suckling piglets (2003)

Exposure to a solid diet at weaning can lead to changes of gastro-intestinal tract (GIT) fermentation processes which can affect the intra-lumen conditions and the health status of piglets. Fermentation can be manipulated by including fermentable carbohydrates in the diet (Williams et al., 2001). Different substrates are fermented in different ways and rates in the various tracts of the intestine. This preliminary study aimed to evaluate in vitro, the kinetics of gas production and other fermentation parameters of four almost indigestible carbohydrates sources when incubated with two inocula based on ileal contents (small intestine) and faeces (large intestine) of suckling piglets.
The Patient With Chronic Epididymitis: Characterization Of An Enigmatic Syndrome (2002)

This comprehensive clinical survey of men diagnosed with chronic epididymitis is the first step for defining and characterizing this particular population. Development of a classification system and symptom assessment index may direct further studies in the etiology, epidemiology and management of chronic epididymitis.
Multi-frequency Class-D inverter for rectifier characterisation in high frequency inductive power transfer systems (2016)

This paper presents the development and utilisation of a voltage source multi-frequency Class-D inverter in a cost-effective test rig for rectifiers in 6.78 MHz to 13.56 MHz inductive power transfer (IPT) systems without the need of the magnetic link. Apart from the inverter, the rig compromises a tuned receiving (Rx) coil of the IPT system and a rectifier under test. With the inverter emulating a magnetically induced voltage in an Rx coil, rectifiers experience IPT conditions while they are isolated from the rest of the system. Therefore, they are accurately analysed with commercially available instruments, without affecting other parts of the IPT system. The Class-D inverter was implemented with Si MOSFETs and is capable of delivering power greater than 200 W with efficiencies higher than 80 %.
Mechanism of free-radical formation in metal carbonyl + halide systems. Solvent effects. Part 1 (1965)

C. H. Bamford, R. Denyer and G. C. Eastmond, Trans. Faraday Soc., 1965, 61, 1459 DOI: 10.1039/TF9656101459
Use of gas-phase ethanol to mitigate extreme UV/water oxidation of extreme UV optics (2004)

A technique is described that uses a gas-phase species to mitigate the oxidation of a Mo/Si multilayer optic caused by either extreme UV (EUV) or electron-induced dissociation of adsorbed water vapor. It is found that introduction of ethanol (EtOH) into a water-rich gas-phase environment inhibits oxidation of the outermost Si layer of the Mo/Si EUV reflective coating. Auger electron spectroscopy, sputter Auger depth profiling, EUV reflectivity, and photocurrent measurements are presented that reveal the EUV/water- and electron/water-derived optic oxidation can be suppressed at the water partial pressures used in the tests (∼2×10−7–2×10−5 Torr). The ethanol appears to function differently in two time regimes. At early times, ethanol decomposes on the optic surface, providing reactive carbon atoms that scavenge reactive oxygen atoms before they can oxidize the outermost Si layer. At later times, the reactive carbon atoms form a thin (∼5 Å), possibly self-limited, graphitic layer that inhibits water adsorption on the optic surface.
Autocorrelation of femtosecond pulses from 415-630 nm using a GaN laser diode (2002)

Summary form only given. Using a 393 nm Nichia NLHV500 laser diode as a photodetector we present results demonstrating a strong two-photon response across a 200 nm range of visible wavelengths which enables sensitive measurement of intensity and interferometric second-order autocorrelations. The single-photon and two-photon response of the laser diode was found at several wavelengths. The modelocked sources were based on a 100 fs Ti:sapphire laser with a repetition rate of 85 MHz which synchronously pumped a periodically poled LiNbO/sub 3/ optical parametric oscillator (OPO).
Mixed-donor and monomeric N-donor adducts of alane (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMixed-donor and monomeric N-donor adducts of alaneJerry L. Atwood, Kirk W. Butz, Michael G. Gardiner, Cameron Jones, George A. Koutsantonis, Colin L. Raston, and Kerry D. RobinsonCite this: Inorg. Chem. 1993, 32, 16, 3482–3487Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published inissue 1 August 1993https://pubs.acs.org/doi/10.1021/ic00068a017https://doi.org/10.1021/ic00068a017research-articleACS PublicationsRequest reuse permissionsArticle Views388Altmetric-Citations41LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
Dilute-Nitride GaPN Alloys Grown on GaP for Red-Orange Light Emitting Diode Materials. (2020)

Abstract not provided.
The Linkage Isomerism of Bridging Thiocyanate in Binuclear Complexes (1972)

ADVERTISEMENT RETURN TO ISSUEPREVArticleThe Linkage Isomerism of Bridging Thiocyanate in Binuclear ComplexesR C. Buckley and J G. WardeskaCite this: Inorg. Chem. 1972, 11, 12, 3152Publication Date (Print):December 1, 1972Publication History Published online20 December 2002Published inissue 1 December 1972https://pubs.acs.org/doi/10.1021/ic50118a604https://doi.org/10.1021/ic50118a604research-articleACS PublicationsRequest reuse permissionsArticle Views40Altmetric-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 optionsGet e-Alertsclose Get e-Alerts
No reflow was caught red handed in a patient with acute anterior myocardial infarction undergoing rescue angioplasty (2004)

Objective: To analyse the relation between restrictive mitral pattern, amino-terminal propeptide of type III procollagen (PIIINP), and prognosis in patients with dilated cardiomyopathy. Design: Prospective cohort study of 106 patients with dilated cardiomyopathy. Setting: Tertiary care centre. Main outcome measures: PIIINP concentration, echocardiographic variables, oxygen consumption, hospitalisation for heart failure, and cardiac mortality were evaluated in patients grouped by the presence of non-restrictive (group 1), reversible (group 2), and irreversible restrictive mitral pattern (group 3). Results: Groups differed regarding left ventricular ejection fraction (group 1, mean (SD) 36 (6)%, group 2, 29 (8)%, group 3, 25 (6)%; p = 0.0001), left atrial ejection fraction (group 1, 0.47 (0.1)%, group 2, 0.43 (0.2)%, group 3, 0.26 (0.1)%; p , 0.0001), and PIIINP (p = 0.001). Multivariate analysis showed that PIIINP was related to mitral pattern (odds ratio 0.8, 95% confidence interval 0.23 to 1.4, p = 0.006) independently of left atrial and ventricular ejection fractions. After 21 months, survival was 88% and 34% (p = 0.0001) in patients with non-restrictive and irreversible restrictive mitral patterns, respectively. Conclusion: In patients with dilated cardiomyopathy, restrictive mitral pattern is associated with higher PIIINP and worse prognosis.
Photoinduced Multiple Spectral Changes of Single Plasmonic Gold Nanospheres by the Aid of Coordination (2014)

Abstract One or both of two localized surface plasmon modes (full-surface mode and interface mode) of a commercially available single Au nanosphere on TiO2 are excited, and the corresponding spectral changes are induced in the presence of thiocyanate. Similar spectral changes can be simulated by assuming site-selective oxidation of the Au nanosphere by plasmon-induced charge separation (PICS).
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>Rb</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:msub><mml:mi>He</mml:mi><mml:mi>n</mml:mi></mml:msub></mml:mrow></mml:math>exciplexes in solid<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mi>He</mml:mi><mml:none/><mml:none/><mml:mprescripts/><mml:none/><mml:mn>4</mml:mn></mml:mmultiscripts></mml:mrow></mml:math> (2006)

We report the observation of emission spectra from ${\mathrm{Rb}}^{*}{\mathrm{He}}_{n}$ exciplexes in solid $^{4}\mathrm{He}$. Two different excitation channels were experimentally identified, viz., exciplex formation via laser excitation to the atomic $5{P}_{3∕2}$ and to the $5{P}_{1∕2}$ levels. While the former channel was observed before in liquid helium, on helium nanodroplets, and in helium gas by different groups, the latter creation mechanism occurs only in solid helium or in gaseous helium above $10\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The experimental results are compared to theoretical predictions based on the extension of a model, used earlier by us for the description of ${\mathrm{Cs}}^{*}{\mathrm{He}}_{n}$ exciplexes. We also report the observation of fluorescence from atomic rubidium in solid helium, and discuss striking differences between the spectroscopic features of $\mathrm{Rb}\text{\ensuremath{-}}\mathrm{He}$ and $\mathrm{Cs}\text{\ensuremath{-}}\mathrm{He}$ systems.