gebhart/patrepeval huggingface dataset:
Structural, vibrational and solid-state NMR studies of the halogenocuprate(I) complexes [(PPh3)2CuI2]- and [(PPh3)CuI3Cu(PPh3)]- (1989)

Single-crystal X-ray diffraction, vibrational spectroscopy, and solid state NMR spectroscopy have been used to characterize two new types of ionic copper(1) complexes. The anion in [PPh3Me]+[(PPh3)2Cu12]c-o ntains two PPh, ligands coordinated to the copper atom of a Cu12 unit in a pseudotetrahedral arrangement, with Cu-P = 2.292 (2), 2.288 (2) A, Cu-I = 2.692 (I), 2.702 ( I ) A, P-Cu-P = 121.24 (9)", and I-Cu-I = 108.62 (4)' (monoclinic, P21/c, a = 12.138 (5) A, b = 14.776 (6) A, c = 28.197 (14) A, 0 = 103.76 (4)O, Z = 4, R = 0.040 for 4490 'observed" (I &gt; 3 4 ) ) reflections). The far-IR spectrum shows a strong band at 118 cm-l that is assigned to the antisymmetric Cu-I stretching mode of the CUI, unit. The CPMAS ,*P NMR spectrum shows a strong singlet at 18.1 ppm (relative to 85% H3Po4) due to the cation and a weaker quartet centered at -16.7 ppm due to the coordinated PPh, in the anion, with line spacings due to Cu-P coupling of 1.08, 1.20, and 1.23 kHz. The anion in [PPh,Me]+[ (PPh,)CuI,Cu(PPh,)]- consists of an approximately D,h Cu213 unit with three iodine atoms bridging the two copper atoms and with one PPh, molecule completing a pseudotetrahedral arrangement around each copper atom. The crystallographically imposed symmetry of the ion is C,,, with the 3-fold axis passing through the P-Cu bonds. The core structural parameters are (5)O, and Cu-I-Cu = 54.88 (4)' (cubic, P2,3, a = 17.744 (IO) A, Z = 4, R = 0.036 for 1390 "observed" reflections). This is the first reported example of a binuclear copper(1) complex with three bridging ligands and is an example of an unusual bonding situation in which two coordination tetrahedra are linked by sharing a common face. This has the effect of producing an unusually short Cu-- -Cu separation of 2.50 A. The far-IR spectrum shows a band at 127 cm-' that is assigned to the doubly degenerate perpendicular Cu-I stretching mode of the CutIl unit. The CPMAS NMR spectrum shows a strong singlet at 20.1 ppm due to the cation and a broad quartet centered at -15.8 ppm due to the coordinated PPh, in the anion. The splitting pattern for this quartet does not conform to expectations for an AX spin system involving coupling between I = I / , and I = ,/, nuclei. The assignments of the ~(CU-I)I R bands in both complexes are supported by approximate normal-wordinate analyses, and the resulting Cu-I force constants are compared with the values obtained in similar analyses of related iodocopper(1) complexes.
TwitterMancer: Predicting User Interactions on Twitter (2019)

This work investigates the interplay between different types of user interactions on Twitter, with respect to predicting missing or unseen interactions. For example, given a set of retweet interactions between Twitter users, how accurately can we predict reply interactions? Is it more difficult to predict retweet or quote interactions between a pair of accounts? Also, which features of interaction patterns are most important to enable accurate prediction of specific Twitter interactions?Our empirical study of Twitter interactions contributes initial answers to these questions. We have crawled an extensive dataset of Twitter accounts and their follow, quote, retweet, reply interactions over a period of a month. Using a machine learning framework, we find we can accurately predict many interactions of Twitter users. Interestingly, the most predictive features vary with the user profiles, and are not the same across all users. For example, for a pair of users that interact with a large number of other Twitter users, we find that certain “higher-dimensional” triads, i.e., triads that involve multiple types of interactions, are very informative, whereas for less active Twitter users, certain in-degrees and out-degrees play a major role. Finally, we provide various other insights on Twitter user behavior.Our code and data are available at https://github.com/twittermancer/.
Interfacial Electron Transfer between the Photoexcited Porphyrin Molecule and TiO2 Nanoparticles:  Effect of Catecholate Binding (2006)

Interfacial electron transfer (ET) dynamics of 5,10,15-trisphenyl-20-(3,4-dihydroxybenzene) porphyrin (TPP-cat) adsorbed on TiO2 nanoparticles has been studied by femtosecond transient absorption spectroscopy in the visible and near-IR region exciting at 400 and 800 nm. TPP-cat molecule forms a charge transfer (CT) complex with TiO2 nanoparticles through the catechol moiety with the formation of a five-membered ring. Optical absorption measurements have shown that the Q-band of TPP-cat interacts strongly with TiO2 due to chelation; however, the Soret band is affected very little. Optical absorption measurements indicate that the catechol moiety also interacts with TiO2 nanoparticles showing the characteristic band of pure catechol-TiO2 charge transfer (CT) in the visible region. Electron injection has been confirmed by monitoring the cation radical, instant bleach, and injected electron in the conduction band of TiO2 nanoparticles. Electron injection time has been measured to be < 100 fs and recombination kinetics has been best fitted with a multiexponential function, where the majority of the injected electrons come back to the parent cation radical with a time constant of approximately 800 fs for both excitation wavelengths. However, the reaction channel for the electron injection process has been found to be different for both wavelengths. Excitation at 800 nm, found to populate the CT state of the Q-band, and from the photoexcited CT state electron injection into the conduction band, takes place through diffusion. On the other hand, with excitation at 400 nm, a complicated reaction channel takes place. Excitation with 400 nm light excites both the CT band of Cat-TiO2 and also the Soret band of TPP-cat. We have discussed the reaction path in the TPP-cat/TiO2 system after exciting with both 400 and 800 nm laser light. We have also compared ET dynamics by exciting at both wavelengths.
Fluorination of Iron Hexagonal Perovskites Promoting Low Temperature Oxygen Mobility (2010)

New materials with original mechanisms driving low temperature oxygen mobility in solids are needed to reduce the operating temperature of solid-oxide fuel cells. Instead of the standard chemical modification of the cationic array in oxides in order to optimize the concentration of anionic carriers, we show that the partial incorporation of F− anions in fluorinated-hexagonal perovskites (FHP) gives raise to efficient low-temperature O2− mobility. In the Ba/Sr−Fe−O system, fluorides incorporate preferentially highly stable hexagonal [BaFxO3-y] layers, thus creating extended defected structures. Contrarily to metastable fluorinated-cubic perovskites, FHP show thermal stability above 1000 °C without significant fluoride removal. Such striking stability is made possible by the reversible reorganization of the anionic array (O2−, F−, and vacancies). It leads to an original “breathing effect” within the hexagonal slabs which improves the redox properties of FHP and suggests a reversible incorporation of oxygen above 200 °C. This phenomenon is rapid and nondestructive as observed from the easy intercalation of FHP-single crystals, fully conserving their crystallinity.
Creeping Contours: A Multilabel Image Segmentation Method for Extracting Boundary Surfaces of Parts in Volumetric Images (2011)

In this work, we introduce a method named creeping contours for image segmentation into component parts for the purpose of extracting the boundary surfaces of these parts. Creeping contours are contours that expand following a speed function defined by the gradient and curvature at contour points, starting from an initial contour position defined either manually or automatically. Contours in the image creep simultaneously at different speeds, while labels are assigned to contour pixels by the defined creeping condition. We also demonstrate the effectiveness of the proposed method by segmenting 2D grayscale images and 3D volumetric computed tomography images of mechanical parts into multiple segments and generating the boundary surfaces of these parts.
Properties of osmium(II) photosensitizers in aqueous and sodium lauryl sulfate micellar media (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties of osmium(II) photosensitizers in aqueous and sodium lauryl sulfate micellar mediaWalter J. Dressick, Kevin W. Raney, J. N. Demas, and B. A. DeGraffCite this: Inorg. Chem. 1984, 23, 7, 875–880Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published inissue 1 March 1984https://pubs.acs.org/doi/10.1021/ic00175a017https://doi.org/10.1021/ic00175a017research-articleACS PublicationsRequest reuse permissionsArticle Views106Altmetric-Citations13LEARN 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
Prediction of signatures of airgun arrays using dual near‐field hydrophones (2019)

ABSTRACT Successful estimation of airgun‐array signatures from near‐field measurements depends on the accuracy of poorly controlled model parameters such as the effective sea surface reflection coefficient and source depth. We propose a method for prediction of robust source signatures, which are insensitive to fluctuations of the latter parameters. The method uses vertical pairs of near‐field hydrophones to measure near‐field pressure and its vertical gradient, combination of which eliminates sea surface reflections from the near‐field data. This excludes the uncertainty related to the fluctuating sea state and source depth from the process of inversion of the near‐field data for source signature. The method explicitly separates the recorded near‐field pressure into its up and down going components, which allows one to measure the effective frequency‐ and angle‐dependent sea surface reflection coefficient right at the source, as well as to estimate the actual source depth. Tests on synthetic and field data demonstrate robust performance of the method.
Ultra-violet triggered vacuum flashover of a water-vacuum interface as a low-inductance closing switch (1999)

Summary form only given, as follows. GSI is one of the two-prototype candidates for driving the future MAG3 Z-pinch load. It is a 640 kJ inductive generator, made of 4 fast Marxes in parallel, a water transmission line, a vacuum storage line and a plasma-opening switch. The plastic interface between the water transmission line and the vacuum storage inductor is used as a crowbar to avoid Marx damage due to reverse voltage. The large-area discharge at large radius provides a very low-inductance closing switch element. Also, the low current density can lower erosion rates of the electrodes. The arrangement of the system will be shown. The flashboard system which provides the triggering illumination will also be described. Equivalent interface circuit and UV triggering abilities will be presented as a function of the electric and magnetic fields.
Induction of TLR Tolerance in Human Macrophages by Adiponectin: Does LPS Play a Role? (2009)

Obesity is regarded as a pro-inflammatory state. It is associated with low circulating levels of the adipokine, adiponectin, which is considered to be an anti-inflammatory. However, adiponectin knockout mice do not consistently demonstrate pro-inflammatory phenotypes, suggesting more complexity in the in vivo immunomodulatory effects of adiponectin than originally anticipated. Moreover, adiponectin exerts pro-inflammatory effects in some experimental systems. This contradiction has been resolved by hypothesizing that adiponectin induces tolerance to inflammatory stimuli, notably Toll-like receptor (TLR) ligands. We noticed that this effect resembled lipopolysaccharide (LPS) tolerance and therefore tested adiponectin from a variety of sources for LPS contamination. All adiponectin tested carried low levels of LPS in the range of 1-30 pg/microg of adiponectin, sufficient to produce final LPS concentrations in the pg/ml range under experimental conditions. We found that induction of tolerance to TLR ligands by adiponectin in human monocyte-derived macrophages could be reproduced by such LPS concentrations. Moreover, the LPS antagonist, polymixin B, substantially inhibited induction of tolerance by adiponectin. Furthermore, polymixin B and a naturally occurring antagonist LPS were able to partially attenuate induction of tumour necrosis factor-alpha and interleukin-6 in human monocyte-derived macrophages by adiponectin. Polymixin B also inhibited nuclear factor-kappaB and mitogen-activated protein kinase signalling elicited by adiponectin. We therefore propose that some of adiponectin's immunomodulatory effects, in particular, its TLR-tolerising actions in human monocyte-derived macrophages, may be confounded by induction of tolerance by contaminating LPS.
Prophylactic, therapeutic and anti-metastatic effects of BMDC and DC lines in mice carrying HPV 16-associated tumours (2003)

Oncogenic, moderately immunogenic MK16/1/IIIABC (MK16) cells were previously established by co-transfection of HPV 16 E6/E7 and activated H-ras oncogene DNA into C57BL/6 kidney cells. Subcutaneous transplantation of the MK16 cells produced progressively growing neoplasms which metastasized spontaneously to lungs. In this communication we report that prophylactic administration of bone marrow-derived dendritic cells (BMDC) as well as dendritic cell (DC) lines DC2.4 and JAWS II at the site of subsequent MK16 tumour transplants inhibited tumour growth and reduced the number of lung metastases. Similarly, in therapeutic experiments, administration of BMDC and DC lines at the site of the growing MK16 tumours or at the site of MK16 tumour residua after surgery inhibited tumour growth. Both BMDC-based vaccines and vaccines based on DC lines had also an antimetastatic effect. These results indicate that the DC line-based vaccines, which represent a standard, well-characterized and more homogeneous material, technically easier to prepare than the fresh BMDC-based vaccines, can be utilized for therapy of surgical minimal residual disease in HPV 16-associated neoplasms and are prospective for relevant clinical trials.
Melanopsin ( Opn4 ) Requirement for Normal Light-Induced Circadian Phase Shifting (2002)

The master circadian oscillator in the hypothalamic suprachiasmatic nucleus is entrained to the day/night cycle by retinal photoreceptors. Melanopsin (Opn4), an opsin-based photopigment, is a primary candidate for photoreceptor-mediated entrainment. To investigate the functional role of melanopsin in light resetting of the oscillator, we generated melanopsin-null mice (Opn4-/-). These mice entrain to a light/dark cycle and do not exhibit any overt defect in circadian activity rhythms under constant darkness. However, they display severely attenuated phase resetting in response to brief pulses of monochromatic light, highlighting the critical role of melanopsin in circadian photoentrainment in mammals.
Exploring Health Literacy in Patients with Chronic Diseases in Chongqing, China in 2018: A Cross-Sectional Study (2020)

Abstract Background: Improving health literacy is the key to chronic disease prevention and improved interventions. However, little is known about the status of health literacy and its influencing factors in patients with chronic diseases. Accordingly, this study aimed to explore the different aspects and factors influencing health literacy among patients with chronic diseases in Chongqing, China.Methods: A cross-sectional survey was conducted in areas of Chongqing using the 2018 National Questionnaire on Health Literacy of Residents administered to 27,336 patients with chronic diseases. The research investigated the prevalence and factors of health literacy in patients with chronic diseases in Chongqing, China using χ 2 tests and logistic regression analysis.Results: Among the participants (n = 27,336), 51.3% were males and 48.7% were females. Only a small number of patients with chronic diseases were health literate (21.6%). Regression analyses indicated that inadequate health literacy was associated with rural area residents (OR: 0.92), minorities (OR: 1.31), farmers (OR: 1.18), nonlocal registered permanent residents (OR: 1.05), and patients with self-rated unhealthy status (OR: 1.80). Patients with chronic diseases aged 25–34 (OR = 1.18) and 35–44 (OR = 1.18) were more likely to have health literacy than patients with chronic diseases aged 65–69. Illiterate or slightly literate patients (OR = 0.10) were less likely to have health literacy than patients who were in the junior college or had a bachelor’s degree or above. Patients with an average annual household income of less than 3,000 yuan (OR = 0.65) were all less likely to have health literacy than patients with an average annual household income of more than 15,000 yuan.Conclusions: Health literacy of patients with chronic conditions remains at a low level and varies significantly with their demographic and sociological characteristics. Therefore, developing and adopting appropriate health promotion programs would be necessary to improve the health literacy of all patients with different types of chronic diseases.
Expression analysis of the ssgA gene product, associated with sporulation and cell division in Streptomyces griseus (1997)

The ssgA gene of Streptomyces griseus B2682, when present in high copy number, results in both suppression of sporulation and fragmented growth of mycelia. Western analysis with polyclonal antibodies against the gene product (SsgA) revealed a close correlation between SsgA accumulation and the onset of sporulation in wild-type cells. The protein was only detected in the cytoplasm. Certain developmental mutants of S. griseus (afs, reIC and brgA) which are defective in aerial mycelium formation in solid culture and submerged spore formation in liquid culture failed to accumulate SsgA. The SsgA protein appeared shortly (1 h) after nutritional shift-down of strain B2682 cells. afs mutant cells sporulated and expressed SsgA only when A-factor was present both before and after nutritional shift-down. Introduction of the ssgA gene in a low-copy-number vector into strain B2682 resulted in fivefold overexpression of SsgA, and was accompanied by fragmented growth of mycelia and suppression of submerged spore formation (in liquid culture) and aerial mycelium formation (in solid culture). Streptomycin production was not inhibited. In a control experiment, a nonfunctional ssgA gene possessing a frameshift mutation near its N-terminus had no effect on either growth or sporulation. It is proposed that the ssgA gene product plays a role in promoting the developmental process of S. griseus.
Factors Associated with Medicine Use and Non-use by Ontario Seniors (2005)

ABSTRACT While there is growing evidence of the increasing use of medicines by the elderly, research undertaken to critically examine differences among types of medicine users in this population is limited. Using population data, we examine the influence of social, demographic, and health-related factors on likelihood of being a non-user, a user of non-prescribed medicines only, or a user of prescription medicines only. We find some evidence of the rational use of drugs (i.e., those who are in better health are more likely to be non-users or to use non-prescribed medicines than those who are in poor health) and of rational explanations for reported use (i.e., being female is associated with less likelihood of non-use or exclusive use of non-prescription medicines than being male). Further analysis of the medicine-use patterns and decisions of elderly men and of those of elderly persons who are widowed or separated/divorced is warranted.
Development and validation of HPLC method - a review (2012)

Many different strategies of high performance liquid chromatographic method development are used today. This review describes a strategy for the systematic development of High performance liquid chromatographic (HPLC) methods. HPLC is an analytical tool which is able to detect, separate and quantify the drug, its various impurities and drug related degradants that can form on synthesis or storage. It involves the understanding of chemistry of drug substance and facilitates the development of analytical method. A number of chromatographic parameters were evaluated in order to optimize the method. An appropriate mobile phase, column, column temperature, wavelength and gradient must be found that affords suitable compatibility and stability of drug as well as degradants and impurities. Forced degradation or alternatively referred as stress testing and it demonstrates specificity when developing stability indicating methods, especially when little is known about potential degradation products. Force degradation studies are helpful in development and validation of stability-indicating methodology, determination of degradation pathways of drug substances and drug products, discernment of degradation products in formulations that are related to drug substances versus those that are related to non–drug substances (e.g. excipients).
Applications of electron backscattered diffraction to studies of annealing of deformed metals (1997)

The applicability of electron backscattered diffraction (EBSD) to studies of thermo mechanical processing is outlined and its relationship to other microtexture methods is discussed. Applications of the technique are grouped into three types. First, the measurement of orientation/misorientation of large numbers of crystallites enables the orientation gradients and misorientation distributions to be measured. Second, EBSD at specific microstructural heterogeneities enables detailed information to be obtained about annealing mechanisms. Third, EBSD in conjunction with in situ scanning electron microscope annealing is shown to be a powerful techniquefor studying boundary mobilities and the development of microstructure.
Self-assembly of ordered water tetramers in an encapsulated [Br(H2O)12]− complex (2012)

An unanticipated anion-water cluster is assembled by one bromide and three highly-ordered "water tetramers" within the cavity of a receptor, providing a perfect C(3) symmetric propeller-shaped bromide-water cluster of [Br(H(2)O)(12)](-).
Sarah Bernhardt en Sao Paulo: una musa para la "capital artística" (2013)

Our pelviscopic operative series from 1986 to June 1991 is reported. Nowadays our group performs 70% of female genital benign lesions by the pelviscopic technique. Infect laparotomy has been abandoned in case of benign ovarian cyst while the pelviscopic myomectomy rate is about 69%. Our results show that this kind of management is safe and also undeniable advantages such as morbidity reduction, shorter hospital stay, less social cost, quick return to work and renewing of the method make the indications more and more every day.
Flame retardant plasticized poly(vinyl chloride) film with selective solar spectral transparent properties (2016)

The combination of UV absorber, pigment yellow, TCPP and ITOhelps prepare PVC film, which possessing high LOI value (35%), high transmittance in vis region (81.56%) and low transmittance in UV (0.40%), HEV (62.79%) and NIR (39.04%) region.