gebhart/patrepeval huggingface dataset:
Hybrid nanocomposite films of polyvinyl alcohol and ZnO as interactive gas barrier layers for electronics device passivation (2012)

The development of low cost, easy processable, barrier encapsulant materials is of critical importance for the rapid commercialization of organic/electronic devices. In this study, flexible and thermally stable composites were prepared by simple solution processing using polyvinyl alcohol as the base polymer matrix and reactive zinc oxide nanoparticles as the dispersed phase. These materials were characterized for their applications as barrier materials for moisture and oxygen sensitive organic devices. Various studies such as thermal analysis, mechanical analysis, surface analysis and permeability studies were used to characterize the composite films for their possible use as a passivation material. The material was used to encapsulate Schottky structured devices, and the performance of these encapsulated devices under accelerated weathering was studied.
Vinylogous carbinolamine tumor inhibitors. 8. Activity of bis(acyloxymethyl) derivatives of pyrroles and pyrrolizines against a panel of murine leukemias and solid tumors. (1982)

The activity of three pyrroles and four pyrrolizines is compared in several different experimental leukemias and solid tumors in mice. Two compounds were particularly noteworthy, the bis(N-cyclohexylcarbamate) and the bis[N-(2-propyl)] derivatives of 2,3-dihydro-5-(3,4-dichlorophenyl)-6,7-bis(hydroxymethyl)-1H-pyrrolizine. These two compounds showed a very high level of activity against B16 melanocarcinoma, CD8F1 mammary tumor, colon tumor 26, and colon tumor 38, and a significant number of "cures" were recorded. The isopropyl compound was more potent than the cyclohexyl compound, but both showed a similar profile of activity.
Review: <i>The Walter Prescott Webb Memorial Lectures: Essays on Walter Prescott Webb</i>, by Joe B. Frantz, W. Turrentine Jackson, W. Eugene Hollon, George Wolfskill, Walter Rundell, Jr., Kenneth R. Philp, and Elliott West and <i>Walter Prescott Webb: His Life and Impact</i>, by Necah Stewart Furman (1977)

Book Review| August 01 1977 Review: The Walter Prescott Webb Memorial Lectures: Essays on Walter Prescott Webb, by Joe B. Frantz, W. Turrentine Jackson, W. Eugene Hollon, George Wolfskill, Walter Rundell, Jr., Kenneth R. Philp, and Elliott West and Walter Prescott Webb: His Life and Impact, by Necah Stewart Furman The Walter Prescott Webb Memorial Lectures: Essays on Walter Prescott WebbJoe B. FrantzW. Turrentine JacksonW. Eugene HollonGeorge WolfskillWalter Rundell,Kenneth R. PhilpElliott WestWalter Prescott Webb: His Life and ImpactNecah Stewart Furman Rodman W. Paul Rodman W. Paul Search for other works by this author on: This Site PubMed Google Scholar Pacific Historical Review (1977) 46 (3): 486–488. https://doi.org/10.2307/3637508 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Rodman W. Paul; Review: The Walter Prescott Webb Memorial Lectures: Essays on Walter Prescott Webb, by Joe B. Frantz, W. Turrentine Jackson, W. Eugene Hollon, George Wolfskill, Walter Rundell, Jr., Kenneth R. Philp, and Elliott West and Walter Prescott Webb: His Life and Impact, by Necah Stewart Furman. Pacific Historical Review 1 August 1977; 46 (3): 486–488. doi: https://doi.org/10.2307/3637508 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentPacific Historical Review Search This content is only available via PDF. Copyright 1977 The Pacific Coast Branch, American Historical Association Article PDF first page preview Close Modal You do not currently have access to this content.
3,3′-Azobis(6-amino-1,2,4,5-tetrazine): A Novel High-Nitrogen Energetic Material (2000)

A very high heat of formation is displayed by the title compound 1, the first azo-1,2,4,5-tetrazine to be synthesized and likely the most dense C,H,N molecule known. These properties make 1 a suitable candidate for propellant and explosive applications. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2000/z14516_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Vector magnetisation of recording media: a new method to compensate for demagnetising fields (1991)

Until now measurements of M(H) loops of thin samples have been corrected for demagnetization after completion of the measurement. In this way, it is possible to correct for the component of the demagnetizing field which is parallel to the applied field. The authors present a method to correct for the total demagnetizing field during the measurement by simultaneously changing the strength of the applied field and rotating the sample. This method has been applied to a sample of metal-evaporated (ME) tape and a Co-Cr layer. These measurements show that the method is significantly better than existing methods. It is shown that the intrinsic magnetic properties of the ME tape and the Co-Cr layer measured with the method are remarkably similar.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Impact of Post-Synthetic Modification Routes on Filler Structure and Performance in Metal–Organic Framework-Based Mixed-Matrix Membranes (2019)

This work systematically investigates an exemplary mixed-matrix membrane (MMM) system composed of a UiO-66-NH2 metal–organic framework (MOF) and a 6FDA-Durene polyimide. The UiO-66-NH2 MOF is post-synthetically modified with 6FDA-Durene oligomers through either chemical or thermal imidization routes. The thermal(T)-PSM approach does not require reactive small molecules for synthesis, thereby allowing the cross-linking reaction between the MOF and the polymer to occur only on the MOF surface. Conversely, the chemical(C)-PSM approach requires reactive small molecules for synthesis, thereby altering internal amine functionality of UiO-66-NH2. Upon embedding these PSM-MOFs in high molecular weight 6FDA-Durene polymers, CO2 and CH4 pure-gas permeation tests reveal that the T-PSM-MOF has synergistic improvements in both permeability and selectivity due to enhanced interfacial compatibility without significant modification to the internal MOF framework. Conversely, MMMs formed with the C-PSM-MOF experienced a significant decrease in permeability due to reactions that occurred inside of the MOF pore structure. These findings suggest that there is a critical need to consider reaction conditions and their corresponding effect on MOF structures when pursuing a PSM approach to form MMMs with desired performance enhancements.
Edge-dependent structural, electronic and magnetic properties of MoS2 nanoribbons (2012)

Two-dimensional materials have various applications in next-generation nanodevices because of their easy fabrication and particular properties. In this work, we studied the effects of edge structures on the edge stability, and electronic and magnetic properties of MoS2 nanoribbons by first-principles calculations. We predicted that S-terminated zigzag nanoribbons are the most stable even without hydrogen saturation because of their low and negative edge energies, although hydrogen saturation of the edge states can stabilize other nanoribbons with different edge structures. MoS2 zigzag nanoribbons are metallic and ferromagnetic. Importantly, their conductivity may be semiconducting (n- or p-type) or half metallic by controlling the edge structures saturated with H atoms. The magnetic states of the MoS2 zigzag nanoribbons are enhanced by H-saturation and are much stronger than those of graphene zigzag nanoribbons. The armchair nanoribbons are semiconducting, with bandgaps increased by the hydrogen saturation of their edge states, and are nonmagnetic. These MoS2 nanoribbons with versatile functions may have applications in spintronics, nanodevices, and energy harvesting.
Growth and characterisation of terrace graded virtual substrates with Si[subscript 1-x]Ge[subscript x] 0.15 ≤ x ≤ 1. (2005)

Growth of terrace graded virtual substrates, pioneered by Capewell (2002), has been conducted utilising solid-source molecular beam epitaxy (SS-MBE) to produce structures of higher germanium composition (up to pure germanium) and greater thickness (up to 20 μm) than previously investigated. Terrace grading offers a number of advantages over more conventional grading techniques which include the reduction of surface threading dislocation density, reduction of surface roughness and the possibility of the complete elimination of threading dislocation pile-up. The closely spaced pile-up of threading dislocations is believed to have a significant impact on the electrical properties of processed devices, and its elimination is a key goal in this work.\n\nNumerous terrace graded virtual substrate compositions have been grown and characterised during the course of this work and, where appropriate, comparison made with more conventional structures. The complete elimination of threading dislocation pile-up has been demonstrated at compositions of 30% and 40%, with a reduced threading dislocation density in comparison to equivalent liner graded structures. A major reduction in threading dislocation density has been accomplished though post growth ex-situ annealing at 900°c for an extend period of time, though the exact mechanism remains uncertain. The possible role of surface precipitates enabling reduction of dislocation pile-up and/or density is considered along with the effects of unwanted particulate contamination during growth.
Effects of colonizing predators on yellow perch (<i>Perca flavescens</i>) populations in lakes recovering from acidification and metal stress (2007)

We examined the effects of predator species on yellow perch (Perca flavescens) from lakes in the Sudbury mining region (Ontario, Canada), where fish communities are just beginning to recover from the effects of decades of acidification and metal stress. The predation regimes investigated included six lakes with no predators, four lakes recently invaded (≤3 years) by predators, and eight lakes with well-established (≥15 years) predator populations. Netting survey results indicated that yellow perch biomass was 69% lower in lakes with predators. In lakes recently invaded by predators, perch displayed earlier ontogenetic diet shifts from zooplankton to benthos and much poorer growth during their first growing season. Energy investment (lipid content per egg) in eggs by mature females was also less in the lakes recently invaded by predators. Growth potential in adult perch (age 1), estimated by nucleoside diphosphokinase, was highest in lakes with established predators. Body condition, controlling for size of perch, was also greatest in established predator lakes. Perch body shape in lakes with predators showed a shift from a typical streamlined, pelagic body form towards a deeper-bodied benthic body form, a change that may increase foraging efficiency for benthos or represent an antipredator strategy.
ChemInform Abstract: Preparation of Spherical Yttria‐Stabilized Zirconia Powders by Reactive‐Spray Atomization. (1997)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Prognostic value of serum gamma-glutamyl transferase activity after myocardial infarction (2001)

gamma-GT is an independent cardiac risk factor in ischaemic patients with established coronary atherosclerosis and previous myocardial infarction.
Antimicrobial peptide genes in Bacillus strains from plant environments. (2011)

The presence of the antimicrobial peptide (AMP) biosynthetic genes srfAA (surfactin), bacA (bacylisin), fenD (fengycin), bmyB (bacyllomicin), spaS (subtilin), and ituC (iturin) was examined in 184 isolates of Bacillus spp. obtained from plant environments (aerial, rhizosphere, soil) in the Mediterranean land area of Spain. Most strains had between two and four AMP genes whereas strains with five genes were seldom detected and none of the strains had six genes. The most frequent AMP gene markers were srfAA, bacA, bmyB, and fenD, and the most frequent genotypes srfAA-bacA-bmyB and srfAAbacA- bmyB-fenD. The dominance of these particular genes in Bacillus strains associated with plants reinforces the competitive role of surfactin, bacyllomicin, fengycin, and bacilysin in the fitness of strains in natural environments. The use of these AMP gene markers may assist in the selection of putative biological control agents of plant pathogens.
Temporal and spectral imaging with micro‐CT (2012)

We believe this combined spectral and temporal imaging technique will be useful for future studies of cardiopulmonary disease in small animals.
Laser excitation power and the flow cytometric resolution of complex karyotypes (2010)

The analytical resolution of individual chromosome peaks in the flow karyotype of cell lines is dependent on sample preparation and the detection sensitivity of the flow cytometer. We have investigated the effect of laser power on the resolution of chromosome peaks in cell lines with complex karyotypes. Chromosomes were prepared from a human gastric cancer cell line and a cell line from a patient with an abnormal phenotype using a modified polyamine isolation buffer. The stained chromosome suspensions were analyzed on a MoFlo sorter (Beckman Coulter) equipped with two water-cooled lasers (Coherent). A bivariate flow karyotype was obtained from each of the cell lines at various laser power settings and compared to a karyotype generated using laser power settings of 300 mW. The best separation of chromosome peaks was obtained with laser powers of 300 mW. This study demonstrates the requirement for high-laser powers for the accurate detection and purification of chromosomes, particularly from complex karyotypes, using a conventional flow cytometer.
Wheatstone bridge for admittance determinations of highly conducting materials at low frequencies (1953)

The determination of reactive properties requires the use of sensitive bridge techniques, whenever the reactance is very small compared with the resistance. The following article describes an accurate Wheatstone bridge which permits resistance and reactance determinations within the frequency range from 10 to 200,000 cycles per second. The maximum accuracy for resistance determinations is one part in 10‾7 the accuracy for reactance depends on frequency and power factor. The various inductance values of the resistance coils cause negative capacities, which are especially high when the resistance values are smaller than 100 ohms. A simple and accurate technique for determination of these capacities is described.
Scaling short-answer grading by combining peer assessment with algorithmic scoring (2014)

Peer assessment helps students reflect and exposes them to different ideas. It scales assessment and allows large online classes to use open-ended assignments. However, it requires students to spend significant time grading. How can we lower this grading burden while maintaining quality? This paper integrates peer and machine grading to preserve the robustness of peer assessment and lower grading burden. In the identify-verify pattern, a grading algorithm first predicts a student grade and estimates confidence, which is used to estimate the number of peer raters required. Peers then identify key features of the answer using a rubric. Finally, other peers verify whether these feature labels were accurately applied. This pattern adjusts the number of peers that evaluate an answer based on algorithmic confidence and peer agreement. We evaluated this pattern with 1370 students in a large, online design class. With only 54% of the student grading time, the identify-verify pattern yields 80-90% of the accuracy obtained by taking the median of three peer scores, and provides more detailed feedback. A second experiment found that verification dramatically improves accuracy with more raters, with a 20% gain over the peer-median with four raters. However, verification also leads to lower initial trust in the grading system. The identify-verify pattern provides an example of how peer work and machine learning can combine to improve the learning experience.
Percutaneous Treatment of Lymphatic Malformations (2009)

Percutaneous sclerotherapy provides effective treatment for macrocystic and microcystic LM as primary treatment or for recurrence after surgical resection.
The α<sub>2</sub> B adrenergic receptor of undifferentiated neuroblastoma × glioma hybrid NG108‐15 cells, interacts directly with the guanine nucleotide binding protein, G<sub>i</sub>2 (1990)

In membranes of undifferentiated neuroblastoma x glioma hybrid cell line NG108-15, the apparent specific binding of [3H]yohimbine measured in the presence of 1 microM noradrenaline, was increased substantially by the presence of the poorly hydrolysed analogue of GTP, guanylyl-imidodiphosphate (Gpp[NH]p) or by preincubation of membranes with antibodies against the C-terminal decapeptide of the alpha subunit of the G-protein Gi2. Such an effect was not produced by antibodies against the equivalent region of Go alpha Gi3 alpha or Gs alpha or from non-immune serum. By contrast, total specific binding of [3H]yohimbine was not modified by co-incubation with Gpp[NH]p or by preincubation with the antibodies from any of the anti-G protein antisera. These results demonstrate a direct interaction of the alpha 2B adrenergic receptor of NG108-15 cells with Gi2.
Intermittent Hypoxia Furthers the Rationale for Hypoxia-Inducible Factor-1 Targeting (2007)

Hypoxia-inducible factor-1 (HIF-1) stabilization is a pivotal event in the response to hypoxic stress. A study in the December 15, 2006 issue of Cancer Research shows that HIF-1 stabilization occurs more robustly as a result of intermittent hypoxia compared with chronic hypoxia. The findings of this study suggest that intermittent hypoxia might influence the efficacy of radiotherapy by more strongly affecting the growth and survival of vascular endothelial cells. This finding offers additional encouragement to efforts to target HIF-1 for cancer therapy.
FACTORS AFFECTING THE VESICULAR‐ARBUSCULAR INFECTION AND MYCORRHIZAL DEPENDENCY OF THIRTEEN WHEAT CULTIVARS (1981)

SUMMARY Wheat cultivars inoculated with Glomus mosseae show different degrees of mycorrhizal infection and mycorrhizal dependency. Mycorrhizal dependency was affected by root and root/shoot (R/S) ratio dry wts, but neither mycorrhizal dependency nor mycorrhizal infection levels were directly affected by N, P, K, Ca or Mg concentrations in plant tissues. Absence of mycorrhizal infection in some wheat varieties was associated with lack of sugar exudation from the roots rather than with the sugar content of the roots. VA infection led to a decrease in the reducing and total sugar content of root extracts, and this effect was correlated with the degree of mycorrhizal infection.
Cytochrome <i>b</i>-562 from <i>Acinetobacter calcoaceticus</i> L.M.D. 79.41. Its characteristics and role as electron acceptor for quinoprotein glucose dehydrogenase (1988)

A soluble cytochrome b was purified from Acinetobacter calcoaceticus L.M.D. 79.41. On the basis of the alpha-band maximum of a reduced preparation, measured at 25 degrees C, it is designated as cytochrome b-562. This cytochrome is a basic monomeric protein (pI 10.2; Mr 18,000), containing one protohaem group per molecule. The reduced form, at 25 degrees C, showed absorption bands at 428, 532 and 562 nm. At 77 K the alpha-band shifted to 560 nm (with a shoulder at 558 nm). The reduced cytochrome did not react with CO. Cytochrome b-562 is most probably (loosely) attached to the outside of the cytoplasmic membrane, since substantial amounts of it, equimolar to quinoprotein glucose dehydrogenase (GDH), were present in the culture medium when cells were grown in the presence of low concentrations of Triton X-100. The midpoint potential at pH 7.0 was found to be +170 mV, a value that was lowered to +145 mV by the presence of GDH. Since the GDH was shown to have a midpoint potential of +50 mV, cytochrome b-562 could function as the natural primary electron acceptor. Arguments to substantiate this view and to propose a role of ubiquinone-9 as electron acceptor for cytochrome b-562 are presented.
ChemInform Abstract: NEUROTROPIC AND PSYCHOTROPIC AGENTS. CXI. NONCATALEPTIC POTENTIAL NEUROLEPTICS‐ 2‐NITRO AND 2‐HYDROXY DERIVATIVES OF 10‐(4‐METHYLPIPERAZINO)‐10,11‐DIHYDRODIBENZO(B,F)THIEPIN (1977)

Abstract Die durch Nitrierung der Chlorphenylessigsäure (I) erhaltene Säure bildet mit Thiophenol das Phenylmercapto‐Derivat (II), das sich einer Cyclisierung zum Dibenzothiepinon (III) unterwirft.
Comparative study of tantalum and tantalum nitrides (Ta2N and TaN) as a diffusion barrier for Cu metallization (1996)

Tantalum (Ta) and tantalum nitride films (Ta2N and TaN) of about 50 nm thickness were reactively sputter deposited onto (100) Si substrate by using dc magnetron sputtering and their diffusion barrier properties in between Cu and Si were investigated by using sheet resistance measurement, x-ray diffraction, Auger electron spectroscopy, and Secco etching. With increasing amounts of nitrogen in the sputtering gas, the phases in the as-deposited film have been identified as a mixture of β-Ta and bcc-Ta, bcc-Ta, amorphous Ta2N, and crystalline fcc-TaN. Diffusion barrier tests indicate that there are two competing mechanisms for the barrier failure; one is the migration of Cu into the Si substrate and another is the interfacial reaction between the barrier layer and the Si substrate. For instance, we identified that elemental Ta barrier failure occurs initially by the diffusion of Cu into the Si substrate through the barrier layer at 500 °C. On the other hand, the Ta2N barrier fails at 700 °C by the interfacial reaction between Ta2N and Si substrate instead of the migration of Cu into the Si substrate. For the case of TaN, the barrier failure occurs by the migration of Cu into the Si substrate at 750 °C. It is also demonstrated that the diffusion barrier property is enhanced as the nitrogen concentration in the film is increased.