gebhart/patrepeval huggingface dataset:
A new class of highly-conducting polymer electrolyte membranes: Aromatic ABA triblock copolymers (2011)

Highly proton-conducting polymer electrolyte membrane (PEMs) materials are presented as alternatives to state-of-the-art perfluorinated polymers such as Nafion®. To achieve stable PEMs with efficient ionic nanochannels, novel fully aromatic ABA triblock copolymers (SP3O-b-PAES-b-SP3O) based on sulfonated poly(2,6-diphenyl-1,4-phenylene oxide)s (A, SP3O) and poly(arylene ether sulfone)s (B, PAES) were synthesized. This molecular design for a PEM was implemented to promote the nanophase separation between the hydrophobic polymer chain and hydrophilic ionic groups, and thus to form well-connected hydrophilic nanochannels that are responsible for the water uptake and proton conduction. Relative to other hydrocarbon-based PEMs, the triblock copolymer membranes showed a dramatic enhancement in proton conductivity under partially hydrated conditions, and superior thermal, oxidative and hydrolytic stabilities, suggesting that they have the potential to be utilized as alternative materials in applications operating under partly hydrated environments.
Pseudo-DNA damage response in senescent cells (2009)

Cellular senescence is currently viewed as a response to DNA damage. In this report, we showed that non-damaging agents such as sodium butyrate-induced p21 and ectopic expression of either p21 or p16 cause cellular senescence without detectable DNA breaks. Nevertheless, senescent cells displayed components of DNA damage response (DDR) such as gammaH2AX foci and uniform nuclear staining for p-ATM. Importantly, there was no accumulation of 53BP1 in gammaH2AX foci of senescent cells. Consistently, comet assay failed to detect DNA damage. Rapamycin, an inhibitor of mTO R, which was shown to suppress cellular senescence, decreased gammaH2AX foci formation. Thus, cellular senescence leads to activation of atypical DDR without detectable DNA damage. Pseudo-DDR may be a marker of general over-activation of senescent cells.
Upconversion Nanoparticles in Bioassays, Optical Imaging and Therapy (2014)

Rare-earth doped nanoparticle (RE), termed upconversion nanoparticle (UCNP), is a new generation of phosphorescence which has recently attracted significant research interest. Due to the unique upconversion properties, UCNP has been considered to be an excellent alternative for conventional fluorescence. Since its first emergence in mid-1960s, UCNPs have been studied in a wide range of fields, including those in biological applications. Owing to its suitable size distribution and biocompatibility, UCNP could be conjugated with various kinds of biomolecules, resulting in the development of numerous biological platforms such as biodetection assays and therapeutic modalities. The unique optical properties of UCNP such as prominent luminescence, deep penetration to biological tissues without damaging the cells, low background and high resistance to photo-bleaching enhance UCNP prospects as an excellent contrast agent in both in vitro and in vivo. In this review, we discuss the recent developments of UCNP in bioassays, optical imaging, and therapy, also the prospects and challenges of UCNP-based detection in the development of biomedical science.
Secondary Reactions in a Gas Discharge (1960)

The pressure variations of H+, H2+, H3+, He+, and HeH+ ions emanating from an electrodeless discharge in pure hydrogen and in mixtures of hydrogen and helium have been measured. Mass analysis was accomplished with a ``strong-focusing'' mass spectrometer. The analysis of the results in hydrogen are discussed, as well as the alternative mechanisms for hydrogen dissociation. From the results in hydrogen-helium mixtures, a value of 0.37±0.15 has been obtained for the ratio k2′/k1′; where k2′ is the rate constant for reaction He++H2→HeH++Hand k1′ is the rate constant for the reaction H2++H2→H3++H.In addition, a value of 0.016±0.013 has been obtained for the ratio k3′/k2′, where k3′ is the rate constant for the reaction H2++He→HeH++H.
Liquid, Gas, and Dense Fluid Viscosity of Ethane. (1962)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid, Gas, and Dense Fluid Viscosity of Ethane.B. E. Eakin, K. E. Starling, J. P. Dolan, and R. T. EllingtonCite this: J. Chem. Eng. Data 1962, 7, 1, 33–36Publication Date (Print):January 1, 1962Publication History Published online1 May 2002Published inissue 1 January 1962https://pubs.acs.org/doi/10.1021/je60012a010https://doi.org/10.1021/je60012a010research-articleACS PublicationsRequest reuse permissionsArticle Views584Altmetric-Citations33LEARN 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
Responsiveness to melatonin and its receptor expression in the aging circadian clock of mice (1997)

This study determined the effect of age on the efficacy of melatonin treatment to phase shift circadian activity rhythms and on melatonin receptor expression in the suprachiasmatic nucleus (SCN) and paraventricular nucleus of the thalamus (PVNT) of C3H/HeN mice. The circadian rhythm of 2-[125I]iodomelatonin binding, assessed at three times of the day [circadian times (CT) 2, 10, and 18], showed a modest age-related decrease in the SCN but not the PVNT of old C3H/HeN mice (24 mo). There was a tendency for age to reduce Mel1a melatonin receptor mRNA expression in the suprachiasmatic nucleus during the day, but not during the night. The magnitude of phase shifts of circadian activity rhythms (advances or delays) induced by administration of melatonin at CT 10 or CT 2 was identical in young and old C3H/HeN mice. Together, these results suggest that the decrease in melatonin receptor expression in the SCN had little effect on melatonin-induced phase shifts of circadian activity rhythms. We conclude that the responsiveness of the circadian timing system to melatonin administration does not decrease with age.
Antibacterial activity of native plants from Northwest Argentina against phytopathogenic bacteria (2018)

Extracts from aerial parts of medicinal plants from northwest Argentina were screened for antibacterial activity against the phytopathogenic strains namely CECT 124 (<i>Pseudomonas corrugata</i>), CECT 126 (<i>P. syringae</i> pv. <i>tomato</i>), CECT 225 (<i>Erwinia carotovora</i> var. <i>carotovora</i>), CECT 472 (<i>Agrobacterium tumefaciens</i>) and CECT 792 (<i>Xanthomonas campestres</i> pv. <i>vesicatoria</i>). Leaves and stems of <i>Aspidosperma quebracho-blanco</i>, <i>Schinus fasciculatus</i>, <i>S. gracilipes</i>, <i>Amphilophium cynanchoides</i> and <i>Tecoma stans</i> were separately extracted with solvents of increasing polarity to obtain the dichloromethane (fCH<sub>2</sub>Cl<sub>2</sub>), ethyl acetate (fEtAc) and methanol extracts (fMeOH), respectively. Among the thirty extracts tested, only fEtAc from leaves and stems of <i>S. fasciculatus</i> reached the IC<sub>50</sub> against the five bacterial strains tested (IC<sub>50</sub> = 0.9 mg/ml). The fEtAc from the leaves contained kaempferol, quercetin and agathisflavone which had moderate to strong antibacterial activity. This extract and its identified flavonoids showed synergic (CECT 124,126 and 792) or additive effects (CECT 472 and 225) in mixtures with Kocide 3000.
Effect of Response Shape Versus Mode Shape on Prediction of Fluidelastic Instability of Tubes Partially Exposed to Crossflow: A Brief Note (2003)

Critical velocities for fluidelastic instabilities for tubes exposed to crossflow are typically predicted based on the normal vibratory mode shapes and frequencies. If the analysis is based on vibratory response shapes rather than mode shapes, significant differences can be shown to exist in the prediction for some cases. These differences tend to be more pronounced in cases of partial exposure of tubes to crossflow or non-uniform spacing of tube supports and at higher damping. A brief assessment and evaluation with two sample problems is given.
DEPENDENCE OF PULSE AMPLITUDE AND POLARITY ON POSITION OF ENTRY IN A SOLID-STATE PARTICLE DETECTOR. (1966)

The dependence of pulse height and polarity on the point of entry by an incident energetic particle on a P-N type silicon solid-state radiation detector was investigated. It is shown that the application of an external bias across the base material (P type) alters the charge carrier collection characteristics of the solid-state radiation detector sufficiently to produce these observed changes in the recorded signal. This effect is attributed to the difference in mobilities between holes and electrons generated by the incident energetic particle and the influence of injected carriers on the space charge region. It is also shown that the collection time of charge carriers within the space charge region is not dependent on position of entry by the incident particle while the collection time of charge carriers outside the space charge region is position dependent. (Author)
Single-frequency operation of a diode-pumped YbrSVAP laser tunable from 1104nmtoll28nm (2002)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text A. K. Hankla, G. J. Wagner, T. J. Carrig, N. A. Brilliant, and C. A. Denman, "Single-frequency operation of a diode-pumped YbrSVAP laser tunable from 1104nmtoll28nm," in Advanced Solid-State Lasers, M. Fermann and L. Marshall, eds., Vol. 68 of Trends in Optics and Photonics Series (Optica Publishing Group, 2002), paper WB8. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Estimation of amorphous fraction in multilevel phase change memory cells (2009)

The effective thickness of the amorphous chalcogenide part within the active element of a phase change memory (PCM) cell is estimated through electrical measurements. Current-voltage characteristics obtained at various intermediate cell states are fitted with the trap-limited subthreshold transport model and the amorphous part thickness is then extracted. Several cell electrical measures, such as the resistance and the threshold voltage, are shown to closely relate to the estimated parameter. The results serve to further validate the trap-limited conduction model, as well as the series phase distribution hypothesis in the active layer of a PCM cell.
On the Usage of Quasi-Cyclic Low-Density Parity-Check Codes in the McEliece Cryptosystem (2006)

We consider possible inclusion of quasi-cyclic low-density parity-check codes in the McEliece cryptosystem, in order to verify the joined security/error control action that this scheme can potentially achieve. As the linearity of the transformation from the private key to the public key exposes the system to the risk of a total break attack, suitable conditions tailored for this class of codes are presented and discussed.
Efficient retrovirus-mediated gene transduction into murine hematopoietic stem cells and long-lasting expression using a Transwell coculture system (1994)

The neomycin phosphotransferase (neo) gene was transduced into murine hematopoietic stem cells by culturing a recombinant retrovirus- producing cell line in a Transwell (Costar, Cambridge, MA) (bottomed with a porous membrane) hung into a Dexter-type long-term bone marrow (BM) culture. Gene transduction into stem cells retaining long-term reconstitution ability was successfully performed by using protocols of total 15 to 18 days of culture including establishment of the Dexter culture, transduction, and G418 selection. In the irradiated recipients of these cells, a large majority of the BM, thymus, and spleen cells as well as peripheral blood (PB) leukocytes were of donor origin and the neo gene was present in these organs up to 21 weeks after cell transfer. One third to two thirds of the in vitro colony-forming cells in the BM of the recipient mice were resistant to cultivation with G418. It was further found that the hematopoietic system of secondary recipients given BM cells from a primary recipient mouse was predominated by original donor-type cells. The transduced neo gene was detected in the PB, BM, thymus, and spleen cells of these secondary recipients. These results indicate that our procedure of retroviral vector-mediated gene transfer is highly effective in safely introducing a gene into pluripotent hematopoietic stem cells.
<i>In situ</i>Evidence for the role of Glucose oxidase in the biocontrol of verticillium wilt by<i>Talaromyces flavus</i> (1991)

Two lines of evidence are presented that support the theory of glucose oxidase involvement in the biocontrol of Verticillium wilt of eggplant by Talaromyces flavus isolate Tf‐1. Purified glucose oxidase from Tf‐1 significantly reduced the growth rate of Verticillium dahliae in the presence, but not in the absence, of eggplant roots. This suggested that glucose from the roots was metabolized by glucose oxidase to form hydrogen peroxide which is toxic to V. dahliae. Isolate Tf‐1‐np, a single‐spore variant of isolate Tf‐1 (which produced 2% of the level of glucose oxidase activity produced by Tf‐1), did not control Verticillium wilt of eggplant in a greenhouse experiment using non‐sterile field soil. In contrast, isolate Tf‐1 significantly reduced the incidence of wilt.
Jena (2004)

The new Semantic Web recommendations for RDF, RDFS and OWL have, at their heart, the RDF graph. Jena2, a second-generation RDF toolkit, is similarly centered on the RDF graph. RDFS and OWL reasoning are seen as graph-to-graph transforms, producing graphs of virtual triples. Rich APIs are provided. The Model API includes support for other aspects of the RDF recommendations, such as containers and reification. The Ontology API includes support for RDFS and OWL, including advanced OWL Full support. Jena includes the de facto reference RDF/XML parser, and provides RDF/XML output using the full range of the rich RDF/XML grammar. N3 I/O is supported. RDF graphs can be stored in-memory or in databases. Jena's query language, RDQL, and the Web API are both offered for the next round of standardization.
A study of spread code in the 2.4‐GHz‐band DS‐SS wireless LAN system (2004)

Abstract The CCK scheme is often used in the 2.4‐GHz‐band DS‐SS wireless LAN system, but the degradation of the transmission quality due to the noise emphasis is a problem, since a hard‐decision decoding is applied to the decoding of information. As another aspect, few studies in the wireless LAN system have evaluated the co‐channel interference characteristics considering the cell allocation. Consequently, this study intends to improve the quality of the wireless LAN system. The maximum‐likelihood decoding is applied to MBOL system of spread code length 4, 8, and 16, and the proposed system using a spread code (code length 12). BER performance is evaluated. In addition, the spectrum efficiency is evaluated as dependent on the cell allocation, considering the interference characteristics. It is verified as a result of simulation that the system using the proposed spread code (code length 12, 16 kinds and minimum distance 6) is effective in terms of the BER performance and the spectrum efficiency. © 2004 Wiley Periodicals, Inc. Electron Comm Jpn Pt 3, 88(1): 48–57, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecjc.20077
ChemInform Abstract: Energetics of Dysprosia‐Stabilized Bismuth Oxide Electrolytes. (2013)

Abstract Dysprosia‐stabilized bismuth oxides Dy x Bi 1‐x O 1.5 (x = 0.11—0.45) are prepared by solid state reaction of appropriate amounts of BiO 1.5 and DyO 1.5 (alumina crucible, 850—950 °C, 12 h) and their energetics are characterized by drop solution calorimetry in molten 3Na 2 O·4MoO 3 at 702 °C.
Approximate connectivity graph generation in mobile ad hoc radio networks (2003)

Simulation is a widely used technique in the design and evaluation of mobile ad-hoc networks. However time and space constraints can often limit the extent of the size, complexity and detail of the networks that can be simulated. Approximations in the system model can possibly alleviate this problem, but we need to be careful about how much accuracy is compromised when employing them. This paper specifically focuses on one aspect of simulation cost that is incurred in the computation of the connectivity graph that is used to describe what mobile nodes can communicate with whom. Since such a graph is recomputed frequently during the simulation, we explore alternatives to computing this graph exactly and their accuracy in capturing the actual graph properties. We investigate three approximation alternatives to compute graph connectivity, and propose metrics for expressing their deviations from the actual graph. In addition, the graphs generated by these approximations are compared to the original by examining two previously proposed graph measures - the degree and clustering coefficient distributions. Results indicate that these approximations can be quite effective in avoiding repeated calculation of exact graph connectivity.
The Ages and Stages Questionnaires: feasibility of use as a screening tool for children in Canada. (2008)

The ASQ is feasible, inexpensive, easy to use, and was appreciated by the parents. It is a sufficiently sensitive and specific monitoring tool that its use in cardiac follow-up programs and in community programs for healthy children is warranted. Although this tool should not be used to replace clinical assessment, it can be used to rationalize access to specialist developmental assessment services.
Fully analytical description of adiabatic compression in dissipative polaritonic structures (2012)

We have theoretically modeled and experimentally fabricated a nanoscale adiabatic (conical) metallic structure that is suitable for high-resolution Raman spectroscopy. We report on a fully complex analytical description of the adiabatic compression phenomenon which is investigated in terms of both geometrical and optical parameters. An explicit analytical description of adiabatic compression is provided together with the physical role played by the complex effective refractive index of the polaritonic adiabatic mode. In particular, we have examined the role of absorption on the field enhancement. Finally, we demonstrate how such a device can experimentally enhance the Raman signal coming from nanosamples such as a bead of SiO${}_{x}$ and a monolayer of benzenethiol.
Fabrication of holographic grating on spherical surface using 5-axis ultrahigh precision machine tool (2002)

A holographic grating was fabricated on a spherical surface using 5 axis ultrahigh precision machine tool. The fabrication of holographic grating have been carreid out with burnishing method. but it was not always possible to obtain deep blazed cross section or curved grooves. The authors here adopt ultraprecision cutting method with V-shaed single crystalline diamond cutting tool to overcome those limitations. A sample grating on a SR1000 sphere was successfully fabricated by this method.
Influence of crown design and material on chipping-resistance of all-ceramic molar crowns: An in vitro study (2018)

The use of LDGC as a monolithic molar crown and as a veneer over a zirconia core resulted in superior resistance to cuspal chipping.
Synthesis of a novel poly(p-phenylene-vinylene) derivative and its application in chemiresistive sensors for electronic noses with an unusual response to organic vapours (2004)

Abstract We report the synthesis of a novel poly( p -phenylene-vinylene) derivative bearing dodecanoylsulfanyl side-groups (12COS-PPV). Good solubility in organic solvents was achieved. The average molecular weight was around 30 000, the energy gap 2.8 eV and the thermal stability up to 130°C. Doping with iodine vapours rose conductivity to 2·10 -6 S/cm. Gas sensors made from FeCl3-doped 12COS-PPV showed an unusual behaviour responding to only four of the eight different organic solvent vapours tested. Recoveries from the responses are not complete, but are reproducible and can be used to discriminate between the four solvents. Quantitative analyses are also possible since there is a good linear correlation between relative response and concentration.
Recherche de nouveaux catalyseurs isospécifiques destinés à la polymérisation du propylène (catalyse Ziegler-Natta et métallocène) (2000)

Texte intégral accessible uniquement aux membres de l'Université de Lorraine
Redistribution of Zn in GaAs-AlGaAs heterojunction bipolar transistor structures (1990)

The redistribution of Zn in the base region of GaAs-AlGaAs heterojunction bipolar transistor structures during growth by organometallic vapor phase epitaxy has been examined with respect to the presence of Si doping in the emitter-contact, emitter, and collector/subcollector layers, and as a function of Zn doping concentration and Si counterdoping level in the p+ base. For a growth temperature of 675 °C the Zn shows no significant redistribution up to concentrations of 3×1019 cm−3 without Si doping. The addition of Si to the adjacent AlGaAs emitter and collector/subcollector layers causes substantial diffusion of Zn from the base, while Si doping of the GaAs emitter contact results in even greater Zn redistribution. Under these conditions, the Zn concentration in the base attains a maximum value of ∼7×1018 cm−3. Silicon counterdoping in the base region retards the Zn diffusion, while strain introduced by an InGaAs cap layer has no effect on the Zn redistribution.
Sulfonamide-Functionalized Gadolinium DTPA Complexes as Possible Contrast Agents for MRI: A Relaxometric Investigation (2000)

A novel Gd-DTPA derivative with a built-in sulfonamide (SA) was synthesized as a contrast agent for MRI. The complex was designed to selectively target the enzyme carbonic anhydrase. It is shown that the longitudinal relaxation rates of aqueous solutions of Gd-DTPA-SA in the presence of carbonic anhydrase increase significantly. The binding constant is determined to be 15,000 ± 5,000 M–1. This value ensures substantial formation of the carbonic anhydrase adduct at imaging concentrations of Gd-DTPA-SA. The complex interacts with erythrocytes, presumably due to a high affinity for the carbonic anhydrase present on the outer surface of the latter. This takes place even though the enzyme has a low abundance and is easily saturated by small amounts of Gd-DTPA-SA. The interaction of Gd-DTPA-SA with serum proteins is negligibly small. Therefore, the complex could potentially be tested as a selective contrast agent for compartments outside the blood pool.
Current status of ambulatory oral and maxillofacial surgery. (2001)

Our experience with ambulatory oral and maxillofacial surgery at Kyoto University Hospital is described. From January through December 2000, 42 patients underwent oral and maxillofacial surgery under general anesthesia at our day surgery unit. The procedures included exodontia, open and closed reduction of mandibular fractures, TMJ surgery, tumor resection, implant surgery, cystectomy, preprosthetic surgery, and removal of salivary stones. All procedures were safely perfomed without complications. Perioperative and postoperative management, including the use of anesthesia is described and discussed.