gebhart/patrepeval huggingface dataset:
Tantalum treated graphite atomizer tubes for atomic absorption spectrometry (1978)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTantalum treated graphite atomizer tubes for atomic absorption spectrometryVladimir J. ZatkaCite this: Anal. Chem. 1978, 50, 3, 538–541Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://pubs.acs.org/doi/10.1021/ac50025a044https://doi.org/10.1021/ac50025a044research-articleACS PublicationsRequest reuse permissionsArticle Views103Altmetric-Citations60LEARN 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
Extremely Regioselective Intramolecular Silylformylation of Bis(silylamino)alkynes (1999)

Intramolecular silylformylation of ω-bis(dimethylsilylamino)-i-alkynes is investigated. This process affords exo-(1-formylalkenylidene)azasilacycloalkane as the initial product, which is converted to the more stable exo-(1-hydroxymethylalkenylidene)azasilacycloalkane through NaBH4 reduction in methanol in high overall yield. Both exo-alkenylidene azasilacycloalkanes are literature unknown compounds and would be versatile polyfunctionalized intermediates in organic syntheses. It should be noted that only the exo-SiMe2H group is removed in this reduction, and the resulting cyclic silylamine is stable against methanolysis and hydrolysis, which is unexpected and unprecedented. The observed stability of the Si−N bond in the cyclic silylamine is found to be ascribed to the existence of the exo-alkylene group at the C-5 position. Thus, the hydrogenation of this double bond leads to a facile Si−N bond cleavage by methanol. In a similar manner, the reactions of 1-bis(dimethylsilyl)amino-2-(1-hexynyl)cycloalkane, followed by NaBH4 reduction, give the corresponding exo-(1-formylalkyl-1-ene)azasilabicyclo[x.3.0]alkanes in high yields. When the diphenylsilyl group is employed in place of the dimethylsilyl group, the reaction gives the corresponding intramolecular silylformylation product in good yield. The exo-HPh2Si−N bond of this product is found to be stable for the reduction with NaBH4, giving the corresponding allylic alcohol.
P09.27: Selective termination in complicated monochorionic pregnancies (2005)

To report our initial experience with selective termination in complicated monochorionic (MC) pregnancies. Seven complicated discordant MC twins have undergone selective feticide in our hospital since February 2004. The indications were: Turner syndrome with hydrops, severe TTTS in monoamniotics discordant for hypoplastic left heart syndrome, acrania-anencephaly sequence, selective IUGR in MC twins and 3 cases of stage III-IV TTTS with severe IUGR, 2 with anterior placenta precluding a correct laser therapy and 1 after a failed laser therapy. All the procedures were performed percutaneously under local anesthesia and consisted in cord occlusion by electrocoagulation using a 2.7–3.0 mm bipolar forceps. The procedure was repeated in two different areas of the cord until cessation of blood flow was documented by Doppler. Main outcome items were perinatal survival and neurological morbidity. The median gestational age at procedure was 20.4 weeks (range 17.1–25.5). The median time for performing the whole procedure, skin to skin, was 27 minutes (range 14–45). The survival rate of the normal co-twin was 85.7% (6/7). Excluding the case that miscarried 2 weeks after the procedure because of an early rupture of the membranes, the median gestational age at delivery was 36.1 weeks (range 34.1–39.1), with a median weight of 2215 gr (range 1750–2850). No single case of brain damage was detected among the survivors, as assessed by both clinical examination and imaging techniques. Although the number of cases is small, our initial results doing cord occlusion by bipolar forceps are comparable with those reported by others.
Laparoscopic Procurement of Kidneys with Multiple Renal Arteries is Associated with Increased Ureteral Complications in the Recipient (2005)

This study investigates the effect of renal artery multiplicity on donor and recipient outcomes after laparoscopic donor nephrectomy. Three-hundred and sixty-one sequential procedures were performed over a 4-year period. Forty-nine involved accessory renal arteries; of these, 36 required revascularization and 13 were small polar vessels and ligated. The 312 remaining kidneys with single arteries served as controls. Study variables included operative times, blood loss, hospital stay, graft function and donor and recipient complications. Kidneys with multiple revascularized arteries had a longer mean warm ischemia time (35.3 vs. 29.2 min, p = 0.0003), and more ureteral complications (6/36 vs. 10/312, p = 0.0013) than single-artery controls. In contrast, ligation of a small superior accessory artery had no significant effect on donor operative time, blood loss, or complication rate while providing similar recipient graft function compared to single-artery controls. Renal artery number is important in selecting the appropriate kidney for laparoscopic procurement. Given the current excellent results with right-sided donor nephrectomy, kidneys with single arteries should be preferentially procured, irrespective of side.
Abstract 2855: The codon 72 polymorphism of p53 influences the transcription of genes involved in immunity and inflammation (2011)

Abstract A common polymorphism at codon 72 in the p53 tumor suppressor protein encodes either proline (P72) or arginine (R72). Several groups have reported that in engineered cell lines this polymorphism influences p53's transcriptional, growth arrest, and apoptotic functions. However, the impact of this polymorphism within the context of a living organism has never been examined. In efforts to understand the biological consequences of the p53 codon 72 polymorphism in a living organism, we generated P72 and R72 mice in the background of the Humanized p53 knock-in (Hupki) mouse. In Hupki mice that are extensively back-crossed into a C57Bl/6 background, we find that there are consistent tissue-specific differences in apoptotic function between the P72 and R72 variants. Within the thymus, we find that the P72 variant is associated with increased apoptosis following gamma radiation. Micro-array analysis indicates that a small subset of genes show increased transactivation in thymocytes from P72 mice compared to R72. These genes include caspase 4/11, which mediates the processing of caspase 1. Interestingly, several of these genes are also regulated by NF-kB, and play roles in immunity and inflammation. Mechanistically we show that p53 interacts with the p65 Rel A subunit of NF-kB, and further that the P72 variant of p53 interacts significantly better than R72. These data indicate that the codon 72 polymorphism affects the ability of p53 to interact with NF-kB and to cooperate in the transactivation of genes involved in immunity and inflammation. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 2855. doi:10.1158/1538-7445.AM2011-2855
Measurements of Hydrogen Solubility in PdCu Thin Films (2012)

Abstract not Available.
A MONITOR FOR SURFACE ADSORBED TRITIUM (1953)

From abstract: "A monitor for detection of surface-adsorbed tritium beta particles has been developed. The detecting element is a windowless Geiger tube with the counting gas flowing through it. The normal limit of detection of a single-tube probe is 800 d/m of tritium, while a three-tube probe is probably limited to about 2000 d/m. Both probes have a counting efficiency of about 10% for tritium."
Multiscale Biological Composites: The Stomatopod Telson: Convergent Evolution in the Development of a Biological Shield (Adv. Funct. Mater. 34/2019) (2019)

In article number 1902238, David Kisailus and co-workers identify multiscale structure-mechanical property relationships within the shield-like exoskeletal telson structure of the mantis shrimp, used for defense and protection. Comparison of telsons from two evolutionarily divergent species reveal differences in macromorphology, cuticle thickness, and mineralization, imparting compressive stiffness as well as compliance for energy absorption (Photo by Roy Caldwell; rendering by Jesus Rivera).
ChemInform Abstract: Synthesis of 1‐Functionalized 5‐Methylnaphtho(2,3‐g)isoquinoline‐6,11‐quinones. (1989)

Abstract Oxidation of the aromatic bisether (I) with ceric ammonium nitrate gives the fused benzoquinone (II) which reacts with the diacetoxybutadiene (III), forming the naphthoquinone (IV).
Phase Stability and Stoichiometry in Thin Film Iron Pyrite: Impact on Electronic Transport Properties (2015)

The use of pyrite FeS2 as an earth-abundant, low-cost, nontoxic thin film photovoltaic hinges on improved understanding and control of certain physical and chemical properties. Phase stability, phase purity, stoichiometry, and defects, are central in this respect, as they are frequently implicated in poor solar cell performance. Here, phase-pure polycrystalline pyrite FeS2 films, synthesized by ex situ sulfidation, are subject to systematic reduction by vacuum annealing (to 550 °C) to assess phase stability, stoichiometry evolution, and their impact on transport. Bulk probes reveal the onset of pyrrhotite (Fe(1-δ)S) around 400 °C, rapidly evolving into the majority phase by 425 °C. This is supported by X-ray photoelectron spectroscopy on (001) crystals, revealing surface Fe(1-δ)S formation as low as 160 °C, with rapid growth near 400 °C. The impact on transport is dramatic, with Fe(1-δ)S minority phases leading to a crossover from diffusive transport to hopping (due to conductive Fe(1-δ)S nanoregions in an FeS2 matrix), followed by metallicity when Fe(1-δ)S dominates. Notably, the crossover to hopping leads to an inversion of the sign, and a large decrease in magnitude of the Hall coefficient. By tracking resistivity, magnetotransport, magnetization, and structural/chemical parameters vs annealing, we provide a detailed picture of the evolution in properties with stoichiometry. A strong propensity for S-deficient minority phase formation is found, with no wide window where S vacancies control the FeS2 carrier density. These findings have important implications for FeS2 solar cell development, emphasizing the need for (a) nanoscale chemical homogeneity, and (b) caution in interpreting carrier types and densities.
Non-linear optical deformation potentials in uniaxially strained ZnO microwires (2017)

The emission properties of bent ZnO microwires with diameters ranging from 1.5 μm to 7.3 μm are systematically investigated by cathodoluminescence spectroscopy at T≈10 K. We induced uniaxial strains along the c-axis of up to ±2.9 %. At these high strain values, we observe a non-linear shift of the emission energy with respect to the induced strain, and the magnitude of the energy shift depends on the sign of the strain. The linear and non-linear deformation potentials were determined to be D1=−2.50±0.05 eV and D2=−15.0±0.5 eV, respectively. The non-linearity of the energy shift is also reflected in the observed spectral broadening of the emission peak as a function of the locally induced strain, which decreases with increasing strain on the compressive side and increases on the tensile side.
Mystery in experimental psychology, aesthetic emotions (2015)

What are aesthetic emotions and how can they be measured? We discuss that these are emotions related to knowledge and to satisfaction of instinct for knowledge. Arguments from cognitive and mathematical models are presented that aesthetic emotions motivate us to acquire and improve knowledge. Cognitive functions of the emotions of beauty and music are discussed. Can aesthetic emotions be measured? The paper discusses possible cognitive mechanisms of aesthetic emotions, existing results, difficulties and opportunities.
Spectroscopy and Lanthanide Impurity Level Locations in CaGa[sub 2]S[sub 4]:Ln[sup 3+] (Ln=Ce, Pr, Tb, Er, Tm) (2004)

International audience
Assessing the potential of hybrid hpc systems for scientific applications (2007)

We have conducted a detailed study to understand the po-tential of hybrid CPU/FPGA High-Performance Computers for improving the performance of data-intensive, scientific applications. In particular, we have focused on an application in proteomics (Polygraph), which is representative of many types of computational analysis applications in the lifesciences: it focuses on extracting useful information from a large body of experimentally collected data (identifying ob-served peptide spectra collected from a mass spectrometer against a well-known protein database). Our preliminary analysis of Polygraph found that morethan half (51%) of the computation time was spent in three routines. We have implemented an FPGA version of themost computationally-intensive routine (20% of the time)on a Cray XD-1 system, and measured the overall speed up achieved in comparison to an optimized software version ofthe routine running on the Cray XD-1's native Opteron processors. We have achieved computational speedups of up to9.16. When we include data movement costs, the overall speedup is reduced to 1.78. We discuss the design and implementation strategies thatled to these results, as well as advantages and limitations we found on the Cray XD-1 platform. We also addressthe advantages and limitations of current development environments, as well as discuss relevant issues we found in our experience as hybrid CPU/FPGA programming model "users".
Comparison of the electronic structures and electrochemical reduction of the P3N3, P2SN3+, PS2N3, and S3N3- rings: x-ray crystal structures of (Ph2PN)2(NSX) (X = Cl, I, NMe2, Ph) (1985)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison of the electronic structures and electrochemical reduction of the P3N3, P2SN3+, PS2N3, and S3N3- rings: x-ray crystal structures of (Ph2PN)2(NSX) (X = Cl, I, NMe2, Ph)N. Burford, T. Chivers, M. Hojo, W. G. Laidlaw, J. F. Richardson, and M. TrsicCite this: Inorg. Chem. 1985, 24, 5, 709–715Publication Date (Print):February 1, 1985Publication History Published online1 May 2002Published inissue 1 February 1985https://pubs.acs.org/doi/10.1021/ic00199a015https://doi.org/10.1021/ic00199a015research-articleACS PublicationsRequest reuse permissionsArticle Views68Altmetric-Citations17LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
Histochemical Study of Matrical Components in the Mandíbular Condyle of the Neonatal Mouse (1990)

In the mandibular condyle of the newborn mouse the chondroprogenitor (CP) zone is the only layer that incorporates 3H-thymidine thus serving the source for cells of the cartilage lineage. Ultrastructurally these cells have a mesenchymal appearance surrounded by collagen fibrils as well as by additional filaments that become apparent following fixation with ferrocyanide-reduced OsO4. In addition, electron-dense particles indicative of proteoglycans are scattered throughout the matrix in the CP zone as well as in the chondroblastic and hypertrophic zones. Following labeling with 35S-sulfate the CP zone as well as the other compartments revealed a substantial number of grains following processing for autoradiography. The number of grains per cell was highest in the hypertrophic zone. Indirect immunofluorescence indicated the presence of fibronectin in the articular surface, CP zone and in the hypertrophic zone. The immunogold method localized fibronectin intracellularly in CP cells and extracellularly in the hypertrophic zone. Therefore, in the mandibular condyle the CP cells which are capable for DNA synthesis are also involved in the synthesis of macromolecules of which some are specific for the cartilage phenotype, while others are associated with other functions of connective tissue cells.
Rewrite Based Specification of Access Control Policies (2009)

Data protection within information systems is one of the main concerns in computer systems security and different access control policies can be used to specify the access requests that should be granted or denied. These access control mechanisms should guarantee that information can be accessed only by authorized users and thus prevent all information leakage. We propose a methodology for specifying and implementing access control policies using the rewrite based framework Tom. This approach allows us to check that any reachable state obtained following a granted access in the implementation satisfies the policy specification. We show that when security levels are not totally ordered some information leakage can be detected.
Multimedia Immersive Technologies and Networking (2008)

1 School of Computer Science and Electronic Engineering, University of Essex, Colchester CO4 3SQ, UK 2Microsoft Research Asia, Beijing 100080, China 3Microsoft Research, One Microsoft Way, Redmond, WA 98052, USA 4School of Electrical and Computer Engineering, Georgia Institute of Technology, 210 Technology Circle, GA 31407, USA 5University of Western Macedonia, P.O. Box 65251, 15410 Attica, Greece
Optimum transmitter optics aperture for satellite optical communication (1998)

An important aspect in satellite optical communication is to obtain minimum bit error rate (BER) using minimum power. This aim can be achieved with very small transmitter beam divergence angles. The disadvantages of too narrow divergence angle is that the transmitter beam may sometimes miss the receiver satellite, due to pointing vibrations. A mathematical model of communication and tracking systems that optimize the BER as function of the transmitter gain is derived.
Editorial - Design of Circuits and Integrated Systems (2007)

Dans IET Computers & Digital Techniques, serie 5, vol. 1, p443
Transient electron energy distribution in supported Ag nanoparticles (2002)

The electron relaxation in Ag nanoparticles supported on graphite is investigated by time-resolved multiphoton photoemission spectroscopy. The photoemission spectra map the transient electron energy distribution in the nanoparticles and reveal the internal thermalization and cooling of the electron gas. The excess energy stored in the electron gas is calculated using the free-electron model. In contrast to the behaviour of isolated nanoparticles the energy loss rate from the electron gas increases with the pump fluence. This indicates that the electron gas equilibration in Ag nanoparticles on graphite is modified by excited electron transport.
Phagocytosis of apoptotic inflammatory cells downregulates microglial chemoattractive function and migration of encephalitogenic T cells (2006)

Apoptosis of autoaggressive T cells in the central nervous system (CNS) and subsequent phagocytosis by microglia is probably crucial in the rapid resolution of the inflammatory infiltrate in T cell mediated neuroinflammatory diseases. In addition to mere clearance, phagocytosis of apoptotic leukocytes results in the downregulation of different microglial immune functions. Chemoattractive functions of Lewis rat microglia and secretion of chemokines and matrix-metalloproteinases (MMPs) were investigated after phagocytosis of apoptotic T cells in vitro. In a modified Boyden chamber assay migration of encephalitogenic T cells toward LPS-stimulated microglial supernatants after phagocytosis of apoptotic thymocytes was reduced by 24.9% in comparison to interaction with viable target cells (P < 0.001). Phagocytosis of apoptotic cells downregulated CC-chemokine ligand (CCL)-5-secretion by LPS-stimulated microglia by 66.2% (P < 0.001), whereas there was only a trend toward decreased CCL2-secretion. As determined by gelatinase-zymography, secretion of MMP-9 by microglia was decreased after phagocytosis of apoptotic cells, whereas MMP-2 secretion was not altered. These mechanisms may reduce further recruitment of pathogenic inflammatory cells into the CNS-lesion and thus contribute to the active resolution of the inflammatory infiltrate and termination of the autoimmune attack.
Follow-up of GST-P during hepatocarcinogenesis with DEN-2AAF in F344 rats. (1995)

Although it is known that doublets of hepatocytes GST-P+ are produced during the first week after initiation with DEN, the activity levels of the enzyme are not known in the initial stages of the process, neither is its behavior through an initiation-promotion scheme. We consider the latter issues important in order to obtain information of the initiation step and its relation with GST-P.DEN was applied as initiator in a single dose on day 0 to F344 rats (200 mg/kg) and as promoter 2-AAF in 20 mg/kg doses on days 7, 8 and 9 of the scheme. Partial hepatectomy was performed on day 10, and daily during the 28 days in which the experiment lasted. The GST-P activity was determined in postmicrosomal supernatants of respective livers (by immunoadsorption) as well as their histological section (by immunohistochemistry). In both cases antibody anti-GST-pi produced in our laboratory was employed. The results obtained show GST-P appearance on day 5 of the scheme in rats treated with carcinogens. The activity of the enzyme increased slowly reaching its maximum on day 18, together with the appearance of GST-P+ preneoplastic nodules. Our results suggest that GST-P could display an additional function to those previously known, in cellular differentiation this could explain the very frequent expression of this enzyme in preneoplastic as well as in neoplastic cells.