gebhart/patrepeval huggingface dataset:
Transmission Electron Microscopy Observation of MgB2 Superconducting Materials with Inhomogeneous Microstructure: Influences of Specimen Preparation Methods (2008)

Transmission electron microscopy (TEM) observation of microstructure in MgB2 superconducting materials was carried out using different TEM specimen preparation methods. When a focused ion beam microsampling (FIB-MS) technique was applied to prepare thin foil specimens, TEM observation revealed inhomogeneous microstructure in MgB2 tapes fabricated by an in situ powder-in-tube (PIT) process: the microstructure composed of a densely crystallized MgB2 area, a partially crystallized area containing amorphous phases, micro-meter sized holes, etc. It was also revealed that doping with SiC in the PIT process makes distribution of the crystallized and partially crystallized areas uniform. On the other hand, when a conventional TEM specimen preparation, pulverizing the specimen into powders and thinning the powders with an Ar ion mill was performed, the microstructural characters of the MgB2 tapes described above were hardly recognized.
Parvovirus B19 Detection by PCR in Patients with Chronic Renal Failure and Resistance to Erythropoietin: An Interim Report. (2007)

Abstract Introduction: The human parvovirus B19 (pvB19) is well known as a cause of chronic anemia and red cell aplasia, this due to the high tropism for the erythroid progenitor cells where it replicates. Some reports have suggested that the infection of this virus is related to an erythropoietin resistance in patients with chronic anemia and kidney failure. The most frequent causes of erythropoietin resistance are iron deficiency, chronic inflammation process, vitamin deficiency, hyperparathyroidism and malignancies among others. The aim of this study was to detect the viral DNA of PvB19 and its correlation with hemoglobin levels and human erythropoietin dosage in patients with kidney failure under hemodialysis treatment. Patients and Methods: All patients had chronic renal failure and were undergoing hemodialysis. The detection of the viral DNA was performed by qualitative polymerase chain reaction (PCR). The PCR reaction was carried out using one specifically designed primer set for PvB19 that encoded for a structural capsid protein (VP1). Erythropoietin resistance (ER) was diagnosed using the European Best practice Guidelines as stated by Hay N (Nephrology, 2002). Results: A total of 58 samples of peripheral blood were obtained from patients with chronic kidney failure. Mean age was 59.41 (23 to 85 years) and mean Hemoglobin levels were 10.1 g/dL (7–14). Iron was normal in all patients and no patient had active infections. Fifty two patients (89.65%) were receiving recombinant erythropoietin. Among all the samples, 3 cases met ER criteria but only in 1 of them did we find the viral DNA (1.72%). Three cases (5.17%) positive to the viral DNA were found in the non erythropoietin resistance group. Conclusion: Although ours is a small group and we are still gathering samples, up until now, no relation appears to exist between the presence of PvB19 genetic material and ER.
Thermal isomerization of homoazocines (1978)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal isomerization of homoazocinesGary D. Ewing, Steven V. Ley, and Leo A. PaquetteCite this: J. Am. Chem. Soc. 1978, 100, 9, 2909–2911Publication Date (Print):April 1, 1978Publication History Published online1 May 2002Published inissue 1 April 1978https://pubs.acs.org/doi/10.1021/ja00477a066https://doi.org/10.1021/ja00477a066research-articleACS PublicationsRequest reuse permissionsArticle Views69Altmetric-Citations5LEARN 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
“Inorganic and Organometallic Clusters and Polymers: Syntheses and Applications” Symposium (2004)

Abstract Conference Reports: This section contains reports on topical conferences. Reports are usually written at the request of the editorial office, but unsolicited contributions are also welcome. Suggestions should be sent to the editorial office of the Macromolecular journals, preferably by E‐mail to macromol@wiley‐vch.de.
Alterações dentárias na síndrome de waardenburg (2014)

Sindrome de Waardenburg (SW; MIM # 193500) e uma doenca autossomica dominante caracterizada pela perda auditiva neurossensorial congenita, distopia canthorum e despigmentacao do cabelo (topete branco), pele e iris. Alem disso, alteracoes musculoesqueleticas, doenca de Hirschsprung e defeitos neurologicos podem ser observados. Manifestacoes orais como agenesia dentaria, fissura do labio e/ou palato, malformacoes de esmalte e lingua fissurada foram descritas em associacao a SW. Este trabalho relata um caso de paciente afetada por WS, com presenca de alteracoes dentarias. Paciente DSA, sexo feminino, 16 anos de idade, foi encaminhada para a Clinica de Estomatologia da Universidade Estadual de Montes Claros, Minas Gerais, Brasil, com queixa principal de ausencia dentaria. Exame fisico revelou presenca de topete branco, manchas acromaticas na regiao abdominal e dos membros inferiores e alteracoes na cor dos olhos. Exame intra bucal revelou dentes conicos, oligodontia e taurodontismo. Avaliacao foi solicitada ao Departamento de Dermatologia e Oftalmologia da Unimontes, que culminou com o diagnostico de SW. Demais membros da familia foram avaliados e dos 29 investigados, 16 apresentaram caracteristicas de SW. Anomalias dentarias, como a agenesia dentaria, dentes conicos e taurodontismo, foram identificadas em outros dois individuos da familia. A presenca de alteracoes dentarias resultou em consideravel impacto estetico em individuos afetados, o que exigiu uma abordagem multidisciplinar. A paciente e seus familiares afetados sao acompanhados pelo Departamento de Odontologia da Unimontes.O diagnostico precoce das alteracoes clinicas nesses casos pode contribuir para melhorar a qualidade de vida dos pacientes afetados. Avaliacoes de mais casos clinicos e familias afetadas sao necessarias para compreensao dos mecanismos envolvidos nas manifestacoes dentarias dessa condicao.
Study of the glow curve structure of the minerals separated from black pepper ( <i>Piper nigrum</i> L.) (2011)

The inorganic mineral fraction extracted from black pepper (Piper nigrum L.) has been analysed using a thermoluminescence (TL) method, investigating the glow curve structure, including an evaluation of the kinetic parameters. Different grain sizes, i.e. 10, 74, and 149 μm, were selected from commercial black pepper. The X-ray diffraction of the inorganic fraction shows that quartz is the main mineral present in it. The samples were exposed to 1–25 kGy doses by gamma rays of 60Co in order to analyse the thermally stimulated luminescence response as a function of the delivered dose. The glow curves show a complex structure for different grain sizes of the pepper mineral samples. The fading of the TL signal at room temperature was obtained after irradiation, and it was observed that the maximum peaks of the glow curves shift towards higher values of the temperature when the elapsed time from irradiation increases. It seems that the fading characteristic may be related to a continuous trap distribution responsible for the complex structure of the glow curve. Similar glow curves structure behaviour was found under ultraviolet irradiation of the samples. The activation energy and the frequency factor were determined from the glow curves of different grain sizes using a deconvolution programme because of the evident complexity of the structure.
Randomized Beamforming With Generalized Selection Transmission for Security Enhancement in MISO Wiretap Channels (2018)

Transmit beamforming (TBF) has been proposed as an effective approach to enhance the security performance of multiple-input single-output (MISO) wiretap channels. However, this secrecy enhancement comes at some expenses, such as power consumption and the amount of signal processing. In addition, in block fading channels, TBF fails to deliver secure communication against intelligent eavesdroppers equipped with advanced channel estimation techniques. Considering these issues associated with TBF, we propose and study randomized beamforming with generalized selection transmission (RBF/GST) to enhance physical layer security in MISO wiretap channels. With GST, Q antennas out of N antennas are selected at the transmitter to maximize the signal to noise ratio at the legitimate receiver. Moreover, RBF is responsible for delivering secure communications in the presence of advanced eavesdroppers. We characterize the physical layer secrecy of RBF/GST under passive and active eavesdropping scenarios, via our closedform expressions for the ergodic secrecy rate and the exact and asymptotic secrecy outage probabilities. We demonstrate that RBF/GST can effectively improve communication secrecy with a reasonable amount of signal processing and power consumption.
Use of the rumen simulation technique (rusitec) to provide micro-organisms for assessing the rate of fermentation. <i>in vitro</i>, of forages. (1993)

In vitro forage-digestion techniques, such as Tilley & Terry (1963) and the recent Pressure Transducer Technique (PTT) of Theodorou et al (1992), rely on rumen-fistulated animals to provide the microbial inoculum. The present study aimed to minimise reliance on rumen-fistulated animals by using the vessel or effluent fluids from the in vitro rumen simulation technique (RUSITEC) of Czerkawski & Breckenridge (1977) as sources of inocula for assessing rate of fermentation of forages using the PTT. A previous study (Owen et al 1991) demonstrated the feasibility of using RUSITEC effluent as a source of micro-organisms for the Tilley and Terry (1963) technique.
<title>On signal/image processing for concealed weapon detection from stand-off range (Invited Paper)</title> (2005)

We present an overview of signal and image processing techniques developed for the concealed weapon detection (CWD) application. The signal/image processing chain is described and the tasks include image denoising and enhancement, image registration and fusion, object segmentation, shape description, and weapon recognition. Finally, a complete CWD example is presented for illustration.
Effects of c-Fos antisense and mis-sense oligonucleotides on Fos expression in the vestibular nucleus and vestibular compensation following unilateral labyrinthectomy (2000)

The aim of the present study was to investigate the effects of an antisense ologodeoxynucleotide (AS-ODN), complementary to the initiation codon of rat c-fos mRNA, on Fos protein expression in the medial vestibular nuclei (MVN) and behavioural recovery ('vestibular compensation') following unilateral labyrinthectomy (UL) in guinea pig. The AS-ODN (1 mM), which was infused into the IVth ventricle close the the MVN beginning at 1 h pre-UL and continuing to 5 h post-UL, inhibited expression of the Fos protein in the MVN; however, a mis-sense ODN (MS-ODN) had a similar effect, suggesting a non-sequence-specific mechanism of action. Neither the AS-ODN nor the MS-ODN had any significant effect on vestibular compensation relative to vehicle controls.
The primary plasminogen-activator inhibitors in endothelial cells, platelets, serum, and plasma are immunologically related. (1985)

Monospecific antiserum to an unusually stable Mr 50,000 plasminogen-activator inhibitor (PAI) purified from cultured bovine aortic endothelial cells was employed in conjunction with reverse fibrin autography to determine whether human platelets, serum, and plasma contain immunologically related inhibitors. Reverse fibrin autography revealed the presence of a Mr 50,000 inhibitor in the platelet and serum samples but not in normal plasma. However, a Mr 50,000 inhibitor was detected in plasma obtained from individuals with increased PAI activity. In each case, treatment of the sample with the anti-inhibitor serum removed the Mr 50,000 inhibitor. The inhibitor present in each sample neutralized exogenously added tissue-type plasminogen activator in a rapid manner. Inhibition was associated with the formation of a NaDodSO4-resistant enzyme-inhibitor complex of Mr 120,000. Again, treatment of the samples with the anti-inhibitor serum removed both the inhibitory activity and the component in these samples that binds to tissue-type plasminogen activator. Thus, the rapidly acting PAI present in human platelets, serum, and patient plasma is immunologically related to the PAI synthesized by cultured bovine aortic endothelial cells. This molecule may be the physiologically relevant inhibitor of plasminogen activator in the vascular system and, as such, may serve an important role in regulating the initiation of vascular fibrinolysis.
Temporal integration, multiple looks, and signal uncertainty (1994)

Viemeister and Wakefield [J. Acoust. Soc. Am. 90, 858–865 (1991)] presented experimental results that challenged the notion of temporal integration as some form of decision process characterized by a long time constant. When the signal consists of brief temporal pulses, detection thresholds vary with the square root of duration, which is consistent with a multiple-look observer. However, when the signal is a continuous sinusoid, detection thresholds vary linearly with duration. The present paper introduces a multiple-look observer in which signal uncertainty and sequential estimation are incorporated. The general form of this observer involves a sequential refinement of the alternative and null hypotheses (from highly uncertain to highly certain stimulus conditions) during the observation interval. Several simplifying assumptions yield an ideal observer whose performance, which can be evaluated analytically, predicts the form of temporal integration for a variety of signals including sinusoids, wideband noise, and pulse sequences. The generality of the theoretical results and experimental verification of the sequential nature of the observer are discussed. [Work supported by grants from NIH.]
In Vivo and In Vitro Corrosion Products of Dental Amalgam (1975)

Corrosion products of amalgam produced in Ringer's solution were compared with products formed in vivo using scanning electron microscopy, X-ray microanalysis, and potentiostatic anodic polarization. The corrosion products in an old amalgam were probably a mixture of tin-oxide and tin oxychloride. In vitro corrosion of fresh amalgam resulted in the buildup of similar products.
Acutely-induced Dietary Hypercholesterolemia in the Rat (1972)

Studies were made on the rapid dietary induction of hypercholestereolemia in rats, with a view to employing experimental conditions thereof in our first screening of orally active hypocholesterolemic agents. The experimental results confirmed that the sex differences had no influence, but the strain, age, body weight of the animals, and diet had a great effect on elevation of serum cholesterol levels. Marked hypercholesterolemia was induced when such strains of rats as showing a high sensitivity to exogenous cholesterol were fed a high fat diet containing 2% cholesterol and 1% cholic acid for a period of 3 days. The hypocholesterolemic activity of natural and synthetic substances was determined in the 3-day oral assay. The most active compound was diethylstilbestrol, followed by L-thyroxine, eritadenine, and β-estradiol. Nicotinic acid, clofibrate, and fradiomycin proved active when given in large doses.
Polymeric Materials for Aerospace Power and Propulsion-NASA Glenn Overview (2008)

Use of lightweight materials in aerospace power and propulsion components can lead to significant reductions in vehicle weight and improvements in performance and efficiency. Polymeric materials are well suited for many of these applications, but improvements in processability, durability and performance are required for their successful use in these components. Polymers Research at NASA Glenn is focused on utilizing a combination of traditional polymer science and engineering approaches and nanotechnology to develop new materials with enhanced processability, performance and durability. An overview of these efforts will be presented.
[Search for clinician-researchers]. (2005)

One of the goals in dental education is to teach students the principles of evidence-based dentistry. This requires the input of scientifically trained clinical staff. It is important to explore and find ways that will invite young and ambitious clinicians to choose for an academic career in which they combine clinical excellence with commitment to science. Various options are discussed that might seduce young clinicians to enter academia and help create a climate in which the dental student of tomorrow will be educated as a critically thinking scientifically trained dentist who is prepared for life-long learning.
ChemInform Abstract: STUDIES ON KETENE AND ITS DERIVATIVES. XCIV. REACTION OF DIKETENE WITH DIAZOACETONE AND 2‐DIAZO ESTERS (1979)

Abstract Beim Bestrahlen reagiert Diazoaceton (I) mit Diketen (II) zum trans‐Spirolacton (III).
Longissimus muscle transcriptome profiles related to carcass and meat quality traits in fresh meat Piétrain carcasses1 (2010)

High quality pork is consumed as fresh meat, whereas other carcasses are used in the processing industry. Meat quality is determined measuring technical muscle variables. The objective of this research was to investigate the molecular regulatory mechanisms underlying meat quality differences of pork originating from genetically different Piétrain boars. Piétrain boars were approved for high meat quality using a DNA marker panel. Other Piétrain boars were indicated as average. Both groups produced litters in similar Piétrain sows. The LM were sampled from 9 carcasses produced by approved boars and 8 carcasses of average boars. Total RNA was isolated, and an equal portion of each sample was pooled to make a reference sample representing the mean of all samples. Each sample was hybridized on microarrays against the reference in duplicate using a dye swaps design. After normalization and subtraction of 2 times the background, only genes expressed in at least 5 carcasses were analyzed. For all analyses the mean of the M-values relative to the reference (i.e., fold change), were used. Sixteen genes showed significant linear or quadratic associations between gene expression and meat color (Minolta a* value, Minolta L* value, reflection, pH 24 h) after Bonferroni correction. All these genes had expression levels similar to the reference in all carcasses. Studying association between gene expression levels and meat quality using only genes with expression statistically differing from the reference in at least 5 carcasses revealed 29 more genes associating with the technological meat quality variables, again with meat color as a main trait. These associations were not significant after Bonferroni correction and explained less of the phenotypic variation in the traits. Bioinformatics analyses with The Database for Annotation, Visualization and Integrated Discovery (DAVID) using the list of genes with more than 2-fold changed expression level revealed that these genes were mainly found in muscle-specific processes, protein complexes, and oxygen transport, and located to muscle-specific cellular localizations. Pathway analysis using the Kyoto Encyclopedia of Genes and Genomes (KEGG) database revealed pathways related to protein metabolism, cellular proliferation, signaling, and adipose development differing between the 2 groups of carcasses. Approved meat carcasses showed less variation in gene expression. The results highlight biological molecular mechanisms underlying the differences between the high meat quality approved and average boars.
Simulation study of a positive ionospheric storm phase observed at Millstone Hill (2006)

Simulation results from the NRL ionospheric model SAMI2 indicate that the changes in the F‐region over Millstone Hill during the geomagnetic storm beginning on 3 April 2004 are primarily due to the influence of a long‐lasting eastward electric field, as was previously suggested by C. Huang et al. [2005]. A simulation of the storm day agrees well with the observational data and shows that, compared with the ionosphere of the previous quiet day, the peak electron density in the F‐region ( N m F 2 ) increased by a factor of ≈2, the altitude of the peak density ( h m F 2 ) rose by ≈80 km, and the F‐region electron temperature decreased by ≈1000 K. Further simulations in which either the neutral atmosphere and winds or the electric field were replaced by their quiet day counterparts clearly suggest that the electric field played the dominant, although not exclusive, role in producing these effects.
Locating the Warm–Hot Intergalactic Medium in the Simulated Local Universe (2004)

Abstract We present an analysis of mock spectral observations of warm–hot intergalactic medium (WHIM) using a constrained simulation of the local universe. The simulated map of oxygen emission lines from local WHIM well reproduces the observed structures traced by galaxies in the real local universe. We further attempt to perform mock observation of the outer parts of the simulated Coma cluster and A 3627 adopting the expected performance of DIOS (Diffuse Intergalactic Oxygen Surveyor), which is proposed as a dedicated soft X-ray mission to search for cosmic missing baryons. We find that WHIMs surrounding nearby clusters are detectable with a typical exposure time of one day, and thus constitute realistic and promising targets for DIOS. We also find that an X-ray emitting clump in front of Coma cluster, recently reported in the XMM-Newton observation, has a counterpart in the simulated local universe, and its observed spectrum can be well reproduced in the simulated local universe if the gas temperature is set to the observationally estimated value.