gebhart/patrepeval huggingface dataset:
Vitamin C and Acute Illness in Navajo Schoolchildren (1976)

To evaluate earlier observations, including our own, showing usefulness of vitamin C for managing the common cold, we performed a double-blind trial of vitamin C versus placebo in 868 children. There was no difference in number becoming ill (133 versus 129), number of episodes (166 versus 159) or mean illness duration (5.5 versus 5.8 days) between the groups. Children receiving vitamin C had fewer throat cultures yielding beta-hemolytic streptococcus (six versus 13, P less than 0.10), but no difference in overall complicated illness rate (24 versus 25). Plasma ascorbic acid levels were higher in the vitamin group 24 to 26 hours after supplementation (1.28 versus 1.04 mg per 100 ml, P less than 0.01). Children with high plasma ascorbic acid concentrations had longer mean illness (6.8 versus 4.0 days, P less than 0.05) than those with low levels. Vitamin C does not seem to be an effective prophylactic or therapeutic agent for upper respiratory illness.
Electronic structure and spectroscopy of luminescent heterobimetallic platinum(II)-rhodium(I), gold(I)-Rh(I), and silver(I)-Rh(I) complexes (1993)

The spectroscopic and luminescent properties of the heterobimetallic [PtRh (dppm)2(CN)2(CN-t-Bu)2] ClO4, [AuRh(dppm)2(CN-t-Bu)2] (ClO4)2, and [AgRh(dppm)2(CN-t-Bu)2](ClO4)2 complexes were investigated. All the three complexes display an intense 1(dσ* → pσ) transition at 473 nm (εmax = 1.34 × 104 M- cm-1), 455 nm (εmax = 2.40 × 104 M-1 cm-1), and 425 nm (εmax = 1.68 × 104 M-1 cm-1), respectively. A molecular orbital calculation on the model complex [PtRh(dmpm)2(CN)2(CN-t-Bu)2]+ (dmpm = bis(dimethylphosphino)methane) suggests that the dσ* orbital is mainly derived from the 4dz2 of Rh and the pσ is made up of π* of isocyanide and 5pz of Rh. In each case, the 1(dσ* → pσ) transition has substantial Rh → π*(isocyanide, phosphine) charge-transfer character. Excitation of solid samples of the complexes leads to phosphorescence derived from the 3(dσ*pσ) excited state. © 1993 American Chemical Society.
Stability of TiN Films Prepared by Chemical Vapor Deposition Using Tetrakis‐dimethylamino Titanium (1996)

The effect of in situ plasma post‐treatment on the stability of TDMAT‐based CVD TiN films was studied. Post‐treatment greatly improves the film stability in air regardless of conditions of the plasma treatment. Among the tested variables, the plasma exposure time strongly affects the resistivity and carbon content of the deposits. Longer treatment results in reduced carbon content and enhanced stability in air. With increasing treatment time, the resistivity decreased exponentially and then finally saturated at a certain value. At a fixed time for plasma treatment, increasing the ratio provides better film stability compared to increasing RF power. However, no noticeable difference of carbon content in the film was observed with variation of RF power and the ratio of at a fixed treatment time. An enhancement of film crystallinity was observed as plasma post‐treatment.
Tuning the Electrocatalytic Efficiency of Heme-Protein Films by Controlled Immobilization on Pyrene-Functionalized Nanostructure Electrodes (2013)

We report here the comparative electrochemistry of differentially attached heme-protein films on porous '3D' nanostructured-pyrene modified electrodes with the corresponding physisorbed protein films on influencing the direct electron transfer (ET) and electrocatalytic kinetics, for the first time. High purity graphite electrodes were coated with specific π-π stacked multiwall carbon nanotube-pyrenyl nanostructures [MWNT/Py-x or MWNT/Py-y, where x = −(CH2)4-NH2; y = −(CH2)3-COOH]. The carboxylic acid groups of glutamic and aspartic acids in myoglobin (Mb) were covalently attached to the pyrenyl amine groups of MWNT/Py-x electrodes (Mb-Asp/Glucov). Similarly, the surface lysines of Mb were covalently attached to the pyrenyl carboxylic acid groups of MWNT/Py-y modified electrodes (Mb-Lyscov). The corresponding electrostatically adsorbed films, Mb-Asp/Gluads and Mb-Lysads, were constructed for comparison. The electron transfer (ET) rate constants of these Mb films were in the following order (ks, s−1): Mb-Lyscov > Mb-Lysads ≈ Mb-Asp/Glucov > Mb-Asp/Gluads. The catalytic efficiency toward peroxide reduction (kcat / KM) was determined to follow the same order as of the ET rates. The observed electrocatalytic features suggest the prospects to favorably enhance the ET and catalytic efficiency of redox protein films by directed covalent immobilization via specific amino acids on suitably designed nanostructure-pyrene modified electrodes.
Mutant p53, EGF receptor and c-erbB-2 expression in human breast cancer. (1991)

p53 expression was studied in 111 primary breast cancers with a monoclonal antibody (PAb240) that reacts with an epitope in mutant p53. Epidermal growth factor receptors (EGFr) and oestrogen receptors (ER) measured by ligand binding, c-erbB-2 expression assessed by immunochemistry and lymph node status were compared with p53 staining. Fifty-nine tumours (53%) were positive for p53, and this correlated with EGFr expression (P less than 0.02), which is a known poor prognostic factor. Eighteen out of 59 p53+ tumours expressed c-erbB-2 versus 4 out of 52 p53- tumours assessed on paraffin sections. However, assessing c-erbB-2 by Southern blotting and immunochemistry on frozen sections showed that 20 out of 59 p53+ tumours overexpressed or had amplified c-erbB-2 compared with 15 out of 52 p53- tumours (not significant). Mean EGFr concentration in p53+ tumours was 31 fmol per mg of membrane protein versus 14 fmol mg-1 in p53- tumours. Cytoplasmic staining was the most frequent pattern found for p53, but some cases showed cytoplasmic plus nuclear staining, or focal cells with predominantly nuclear staining. Thus, abnormal p53 is the commonest oncogene abnormality described in breast cancer. The association with EGFr expression suggests that these oncogenes interact in the pathogenesis of breast cancer.
Seyfert Galaxies in the IRAS Survey and JHKL Photometry (1985)

The near- to far-infrared properties of an optically selected sample of ordinary spiral galaxies, H2 (starburst) galaxies and Seyferts types 1 and 2 are summarized. The spectral indices between 1 and 100ym are shown to be almost independent of galaxy type. New JHKL photometry for a sample of Seyferts found from IRAS data by de Grijp et al. (1985) is given. No essential differences are found in the near-infrared behaviour of Seyferts selected by the two different methods. The de Grijp et al. criteria are shown to exclude many Seyfert galaxies known from optical work.
Expression of Progenitor Cell Markers During Expansion of Sorted Human Pancreatic Beta Cells (2005)

Functional pancreatic beta cell mass is dynamic and although fully differentiated, beta cells are capable of reentering the cell cycle upon appropriate stimuli. Stimulating regeneration-competent cells in situ is clearly the most desirable way to restore damaged tissue. Regeneration by dedifferentiation and transdifferentiation is a potential source of cells exhibiting a more developmentally immature phenotype and a wide differentiation potential. In this context and to gain a better understanding of the transformation induced in human beta cells during forced in vitro expansion, we focused on identifying differences in gene expression along with phenotypical transformation between proliferating and quiescent human beta cells. FACS-purified beta cells from three different human pancreata were cultured during 3-4 months (8-10 subcultures) on HTB-9 cell matrix with hepatocyte growth factor. Gene expression profiling was performed on cells from each subculture on "in-house" pancreas-specific microarrays consisting of 218 genes and concomitant morphological transformations were studied by immunocytochemistry. Immunocytochemical studies indicated a shift from epithelial to neuroepithelial cell phenotype, including progenitor cell features such as protein gene product 9.5 (PGP 9.5), Reg, vimentin, and neurogenin 3 protein expression. The expression of 49 genes was downregulated, including several markers of endocrine differentiation while 76 were induced by cell expansion including several markers of progenitor cells. Their pattern also argues for the transdifferentiation of beta cells into progenitor cells, demonstrating neuroepithelial features and overexpressing both PBX1, a homeodomain protein that can bind as a heterodimer with PDX1 and could switch the nature of its transcriptional activity, and neurogenin 3, a key factor for the generation of endocrine islet cells. Our study of the machinery that regulates human beta cell expansion and dedifferentiation may help elucidate some of the critical genes that control the formation of adult pancreatic progenitor cells and hence design targets to modify their expression in view of the production of insulin-secreting cells.
Aggregation behavior of aqueous cellulose nanocrystals: the effect of inorganic salts (2016)

Natural anisotropic building-blocks such as cellulose nanocrystals (CNCs) have attracted considerable attention due to their biodegradability and nanometer-size. In this work the colloidal behavior of CNCs, obtained from sulfuric acid hydrolysis of microcrystalline cellulose, has been studied in presence of salts of different valences. The influence on the colloidal stability and nature of aggregates has been investigated for monovalent salts (LiCl, NaCl, KCl, CsCl), divalent salts (CaCl 2 and MgCl 2 ), and a trivalent salt (AlCl 3 ), both experimentally by means of turbidity and small angle X-ray scattering (SAXS) measurements, as well as by Monte Carlo simulations using a simple coarse-grained model. For the entire salt series, a critical aggregation concentration (CAC) could be determined by turbidity measurements, as a result of the reduction of effective Coulomb repulsions due to the presence of sulfate groups on the CNC surface. The CACs also followed the Schulze-Hardy law, i.e. the critical aggregation concentration decreased with increasing counterion valence. For the monovalent ions, the CACs followed the trend Li ? [ Na ? [ K ? [ Cs ? , which could be rationalized in terms of matching affinities between the cation and the sulfate groups present at the surface of CNCs. From the SAXS measurements it was shown that the density of the aggregates increased with increasing salt concentration and ion valence. In addition, these findings were rationalized by means of simulation, which showed a good correlation with experimental data. The combination of the experimental techniques and the simulations offered insight into interactionaggregation relationship of CNC suspensions, which is of importance for their structural design applications.
Apres Joh, Le Deluge (1988)

It all had a touch of high tragic drama about lt. Storms swept Brisbane; Macbeth and King Lear were Invoked; and there was much wailing and gnashing of teeth as the tribune of the Moral Right, Rona Joyner, warned of an imminent "wave of lmmorality" In the wake of the demise of Joh Bjelke Petenen ·after 19 years as Premier.
Soviet Historiography and America's Role in the Intervention (1960)

THE postwar years, and particularly the last decade, have witnessed the appearance in Russia of a considerable body of historical literature devoted either directly or indirectly to Soviet-American relations in the initial period of Soviet power. T'his literature has been concerned primarily with the role of the United States in the Allied intervention and in the Russian civil war. The attention given to this subject by Soviet historians over the period in question, in fact, has considerably exceeded that which the subject has received in the West during the same years. While there are significant variations in the degree of ideological coloration, all of this material is written in Communist terms and involves frequent use of expressions that would not be accepted in Western scholarly circles as having any clearly established scientific meaning. Though this naturally complicates the use of the material by Western historians and impedes the normal process of international scholarly discussion, it would not, in itself, constitute an insuperable barrier to the achievement of a certain community of effort, designed to develop at least a body of factual material on which both sides could agree as a starting point for interpretation. But for this there would also be necessary something like a common standard in the treatment and use of historical evidence, and in particular a common willingness to respect not only the individual fact but the preponderant and obvious weight of available factual evidence as the supreme arbiter of historical controversy. It is this common standard that seems frequently to be lacking. Occasionally, in the perusal of Soviet historical material, one does indeed seem to feel himself in the presence of people from whom he is divided by no
A full digital self-timed clock generation scheme (2002)

A full digital self-timed clock generation scheme is developed, where multiple internal clocks are self-generated for each external request. The internal clock period is designed to be the critical path delay of the internal system at all operating environments. This scheme can be applied to time-multiplexed implementations, self-timed operation, and low-power applications.
Einfluss des Leistungsbedarfs von Flugzeugsystemen auf den Kraftstoffverbrauch (2004)

Durch den zunehmenden Leistungsbedarf von Flugzeugsystemen bekommt die Leistungsentnahme in Form von Wellenleistung (Generatoren, Pumpen) und Zapfluft (Klimaanlage, Enteisung) eine wachsende Bedeutung für den Kraftstoffbedarf. Durch die Entwicklung neuer Systemtechnologien werden hydraulisch und pneumatisch versorgte Systeme zunehmend durch elektrisch versorgte ersetzt. Der vorliegende Artikel stellt Teilergebnisse eines im Arbeitsbereich Flugzeug-Systemtechnik durchgeführten Forschungsprogramms zum Einfluss von Systemleistungsbedarf auf den Kraftstoffverbrauch vor. Er analysiert qualitativ und quantitativ den Einfluss des Systemleistungsbedarfs auf den Kraftstoffverbrauch und bringt die Systemparameter Systemmasse, Wellenleistungsbedarf, Zapfluftbedarf und Widerstandserhöhung (beispielsweise durch zusätzlich benötigte Lufteinläufe) miteinander in Zusammenhang. Weiterhin wird der Einfluss verschiedener Flugmissionen aufgezeigt.
Lateral fluoro substituted 4-alkyl-4″-chloro-1,1′:4′,1″-terphenyls and derivatives. Useful high birefringence, high stability liquid crystals (1993)

Abstract By modification of the basic 4-alkyl-4″-chloro-1,1′:4′,1″-terphenyl structure with lateral fluoro substituents and ethyl linking groups, a wide range of mesogens has been synthesized. Control over the phase behaviour, especially optimization of nematic properties, can be achieved by the degree and position of lateral fluoro substitution and/or the presence and position of an ethyl linking group. The effect of these changes on the physical properties such as dielectric anisotropy (Δε) and birefringence (Δn) has also been studied. Compounds of low melting point, wide nematic range and high birefringence (>0·2) have been made. These materials are suitable for active matrix display applications where high chemical and photostability are necessary.
Antibacterial Constituents of the Diatom Navicula delognei (1984)

The novel ester (E)-phytol (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoate++ + (1); (6Z,9Z,12Z,15Z)-hexadecatetraenoic acid; (6Z,9Z,12Z,15Z)-octadecatetraenoic acid; and (6Z,9Z,12Z)-hexadecatrienoic acid isolated from the diatom Navicula delognei f. elliptica, show significant antibacterial activity against Staphylococcus aureus, Staphylococcus epidermidis, Salmonella typhimurium, and Proteus vulgaris. beta-Carotene, alpha-cryptoxanthin, fucoxanthin, lutein, trans-phytol, and plastoquinone-9 were also isolated from this diatom.
Spectrophotometric Study of the Reaction of Protein Sulfhydryl Groups with Organic Mercurials (1954)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectrophotometric Study of the Reaction of Protein Sulfhydryl Groups with Organic MercurialsP. D. BoyerCite this: J. Am. Chem. Soc. 1954, 76, 17, 4331–4337Publication Date (Print):September 1, 1954Publication History Published online1 May 2002Published inissue 1 September 1954https://pubs.acs.org/doi/10.1021/ja01646a025https://doi.org/10.1021/ja01646a025research-articleACS PublicationsRequest reuse permissionsArticle Views877Altmetric-Citations1360LEARN 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
Embedded Vision Sensor Network for Planogram Maintenance in Retail Environments (2015)

A planogram is a detailed visual map that establishes the position of the products in a retail store. It is designed to supply the best location of a product for suppliers to support an innovative merchandising approach, to increase sales and profits and to better manage the shelves. Deviating from the planogram defeats the purpose of any of these goals, and maintaining the integrity of the planogram becomes a fundamental aspect in retail operations. We propose an embedded system, mainly based on a smart camera, able to detect and to investigate the most important parameters in a retail store by identifying the differences with respect to an "approved" planogram. We propose a new solution that allows concentrating all the surveys and the useful measures on a limited number of devices in communication among them. These devices are simple, low cost and ready for immediate installation, providing an affordable and scalable solution to the problem of planogram maintenance. Moreover, over an Internet of Things (IoT) cloud-based architecture, the system supplies many additional data that are not concerning the planogram, e.g., out-of-shelf events, promptly notified through SMS and/or mail. The application of this project allows the realization of highly integrated systems, which are economical, complete and easy to use for a large number of users. Experimental results have proven that the system can efficiently calculate the deviation from a normal situation by comparing the base planogram image with the images grabbed.
Characterization of α-phase soft proton-exchanged LiNbO_3 optical waveguides (2001)

Waveguides in LiNbO3 are realized by a soft proton exchange (SPE) process with use of a melt of stearic acid highly diluted by lithium stearate. No phase transitions are formed when alpha-phase waveguides are obtained by SPE. The alpha-phase presents the same crystalline structure as that of pure LiNbO3 crystal, and it maintains the excellent nonlinear and electro-optical properties of the bulk material. The kinetics of the SPE method is studied by the use of secondary-ion mass spectrometry and prism-coupling techniques. The hydrogen effective diffusion coefficient as well as the self-diffusion coefficients of H+ and Li+ ions are determined as a function of the proton-exchange temperature for X-cut LiNbO3.
Using Times-Four Carrier Recovery in M-QAM Digital Radio Receivers (1987)

We have investigated the performance of the times-four method of carrier recovery in a digital radio link transmitting <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">M</tex> -level quadrature amplitude modulation ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">M</tex> -QAM), where <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">M</tex> can be 16, 64, 256, etc.. With the help of a recently built multipath fade simulator, we measured rms phase jitter for various combinations of fade notch frequency and fade depth. This paper reports on the experiment and the associated analysis. The times-four method has the virtues that it does not depend upon accurate data decisions, and it does not interact with the receiver's adaptive equalizer. Our results show that the rms phase jitter using this method, for all but the most severe and improbable fades, could be held to a few degrees. Although the measurements were done only for 16 QAM, the analysis predicts only modest increases for higher numbers of levels. The analysis also predicts, and the measurements verify, that the recovered carrier amplitude shrinks to zero for four distinct combinations of fade notch frequency and fade depth. To our knowledge, this phenomenon has not been reported in the literature heretofore. We show that, from a statistical viewpoint, the damage associated with it (measured in terms of outage time) should be quite small.
Synthesis and structural characterization of the Pt2(II,III) complex (NBu4)[(C6F5)2Pt(.mu.-C6F5)2Pt(C6F5)2] and the Pt2(III,III) complex (NBu4)[(C6F5)2Pt(.mu.-C6F5Cl)(.mu.-C6F5)Pt(C6F5)2]. Novel ligand reactivity of a bridging C6F5 group (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structural characterization of the Pt2(II,III) complex (NBu4)[(C6F5)2Pt(.mu.-C6F5)2Pt(C6F5)2] and the Pt2(III,III) complex (NBu4)[(C6F5)2Pt(.mu.-C6F5Cl)(.mu.-C6F5)Pt(C6F5)2]. Novel ligand reactivity of a bridging C6F5 groupRafael Uson, Juan Fornies, Milagros Tomas, Jose M. Casas, F. Albert Cotton, Larry R. Falvello, and Xuejun FengCite this: J. Am. Chem. Soc. 1993, 115, 10, 4145–4154Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 May 1993https://pubs.acs.org/doi/10.1021/ja00063a036https://doi.org/10.1021/ja00063a036research-articleACS PublicationsRequest reuse permissionsArticle Views161Altmetric-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-AlertscloseSupporting Info (3)»Supporting Information Supporting Information Get e-Alerts