gebhart/patrepeval huggingface dataset:
DIELECTRIC EVIDENCE FOR EXISTENCE OF TWO-LEVEL-SYSTEMS IN CYCLOHEXANOL, A " GLASSY CRYSTAL " SYSTEM (1982)

Cyclohexanol exhibits a "glassy" crystal phase at low temperatures. In this phase the mass centers of the molecules form a crystalline lattice, but the orientations of the molecules are disordered. We have measured the dielectric constant of these crystals in temperature range 0.4 K to 20 K at a frequency of 11 GHz. At low temperatures the dielectric constant decreases logarithmically with temperature and increases again at higher temperatures. This behaviour is similar to the low temperature dielectric behaviour of amorphous dielectrics with spatial disorder and may be interpreted in terms of existence of two-level-systems with a constant density of states. Examination of two samples with different water contents shows that the water does not have any significant influence on the density of states and transverse dipole moment of the two-level-systems.
Inactivation of Tautomerase Activity of Macrophage Migration Inhibitory Factor by Sulforaphane: a Potential Biomarker for Anti-inflammatory Intervention (2011)

An improved assay for measuring MIF tautomerase activity and its applications are described.
Post-stroke Neurogenesis: Friend or Foe? (2021)

The substantial clinical burden and disability after stroke injury urges the need to explore therapeutic solutions. Recent compelling evidence supports that neurogenesis persists in the adult mammalian brain and is amenable to regulation in both physiological and pathological situations. Its ability to generate new neurons implies a potential to contribute to recovery after brain injury. However, post-stroke neurogenic response may have different functional consequences. On the one hand, the capacity of newborn neurons to replenish the damaged tissue may be limited. In addition, aberrant forms of neurogenesis have been identified in several insult settings. All these data suggest that adult neurogenesis is at a crossroads between the physiological and the pathological regulation of the neurological function in the injured central nervous system (CNS). Given the complexity of the CNS together with its interaction with the periphery, we ultimately lack in-depth understanding of the key cell types, cell-cell interactions, and molecular pathways involved in the neurogenic response after brain damage and their positive or otherwise deleterious impact. Here we will review the evidence on the stroke-induced neurogenic response and on its potential repercussions on functional outcome. First, we will briefly describe subventricular zone (SVZ) neurogenesis after stroke beside the main evidence supporting its positive role on functional restoration after stroke. Then, we will focus on hippocampal subgranular zone (SGZ) neurogenesis due to the relevance of hippocampus in cognitive functions; we will outline compelling evidence that supports that, after stroke, SGZ neurogenesis may adopt a maladaptive plasticity response further contributing to the development of post-stroke cognitive impairment and dementia. Finally, we will discuss the therapeutic potential of specific steps in the neurogenic cascade that might ameliorate brain malfunctioning and the development of post-stroke cognitive impairment in the chronic phase.
Carbon−Carbon Coupling and Carbon−Hydrogen Activation Reactions in Bis(triisopropylphosphine)osmium Complexes (1996)

Reaction of the alkenyl complex OsCl(E-CHCHPh)(CO)(PiPr3)2 (1) with phenyllithium gives OsH{C6H4-2-(E-CHCHPh)}(CO)(PiPr3)2 (2). The structure of 2 (isomer 2a) has been determined by X-ray diffraction: triclinic, P1̄, a = 9.230(1) Å, b = 10.092(1) Å, c = 18.525(2) Å, α = 88.667(7)°, β = 87.172(7)°, γ = 71.110(6)°, V = 1630.6(3), Z = 2, R (F, Fo ≥ 4σ(Fo)) = 4.01, wR (F2, all reflections) = 9.94%. The geometry around the osmium can be described as a distorted octahedron with the two triisopropylphosphine ligands occupying two relative trans positions. The remaining perpendicular plane is formed by the carbonyl and the 2-(E-1‘-styryl)phenyl ligands mutually trans disposed, the hydride ligand and one olefinic hydrogen of the 2-(E-1‘-styryl)phenyl ligand, which shows an agostic interaction with the osmium atom (distance 2.05(7) Å). The solutions of 2 show equilibria between the agostic isomer (2a) and a nonagostic isomer (2b). The thermodynamic magnitudes involved in the equilibrium as well as the activation parameters for the conversion between the two isomers were determined in toluene-d8 by 1H NMR spectroscopy. The values obtained were ΔH° = −1.6 (±0.1) Kcal mol-1 and ΔS° = −9.6 (±0.6) cal K-1 mol-1 for the formation of the agostic isomer, whereas the activation parameters for the breaking of the agostic interaction were ΔH⧧ = 7.6 (±0.2) Kcal mol-1 and ΔS⧧ = −1.0 (±0.7) cal K-1 mol-1. 2 reacts with CO to give the octahedral complex OsH{C6H4-2-(E-CHCHPh)}(CO)2(PiPr3)2 (3). Reactions of 1 with methyllithium and CD3Li give OsH{C6H4-2-(E-CHCHCH3)}(CO)(PiPr3)2 (4) and OsH{C6H4-2-(E-CHCHCD3)}(CO)(PiPr3)2 (4-d3), respectively. The spectra of these complexes indicate that in solution they also show equilibria between agostic and nonagostic isomers. Reactions of 4 with P(OMe)3 and CO afford OsH{C6H4-2-(E-CHCHCH3)}(CO){P(OMe)3}(PiPr3)2 (5) and OsH{C6H4-2-(E-CHCHCH3)}(CO)2(PiPr3)2 (6), respectively, in which the incoming ligands coordinate trans to the hydride. 4 and 4-d3 isomerize in solution to give OsH(η3-CH2CHCHPh)(CO)(PiPr3)2 (11) and OsD(η3-CD2CHCHPh)(CO)(PiPr3)2 (11-d3), respectively. Reaction of 11 with CO leads to OsH(η1-CH2CHCHPh)(CO)2(PiPr3)2 (12). The first order constants kobs and kobs-d3 for the isomerization of 4 and 4-d3 to 11 and 11-d3 were obtained in CDCl3, giving activation parameters of ΔH⧧ = 20.8 (±1.7) Kcal mol-1 and ΔS⧧ = −2.8 (±2.0) cal K-1 mol-1 for the isomerization of 4 to 11 and a relation kobs/kobs-d3 = 3.6 at 303 K.
Accommodation to multiple-focal-plane displays: Implications for improving stereoscopic displays and for accommodation control (2010)

Most stereoscopic displays present images at a single focal plane, resulting in "conflicts" between the stimuli to vergence and accommodation. Minimizing these conflicts is beneficial because they can cause distorted depth percepts, visual fatigue, and reduced stereoscopic performance. One proposed solution is to present a sum of images at multiple focal planes and to vary focal depth continuously by distributing image intensity across planes-a technique referred to as depth filtering. We evaluated this digital approximation to real-world variations in focal depth by measuring accommodation responses to depth-filtered stimuli at various simulated distances. Specifically, we determined the maximum image-plane separation that supported accurate and reliable accommodation. We used an analysis of retinal-image formation to predict when responses might be inaccurate. Accommodation to depth-filtered images was accurate and precise for image-plane separations up to ∼1 diopter, suggesting that depth filtering can be used to precisely match accommodation and vergence demands in a practical display. At larger plane separations, responses broke down in a manner consistent with our analysis. We develop this approach to consider how different spatial frequencies contribute to accommodation control. The results suggest that higher spatial frequencies contribute less to the accommodation response than has previously been thought.
Regiospecific and stereospecific functionalization of benzylic sites by tricarbonylchromium arene complexation (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRegiospecific and stereospecific functionalization of benzylic sites by tricarbonylchromium arene complexationGerard Jaouen, Siden Top, Alain Laconi, Daniel Couturier, and Jacques BrocardCite this: J. Am. Chem. Soc. 1984, 106, 7, 2207–2208Publication Date (Print):April 1, 1984Publication History Published online1 May 2002Published inissue 1 April 1984https://pubs.acs.org/doi/10.1021/ja00319a049https://doi.org/10.1021/ja00319a049research-articleACS PublicationsRequest reuse permissionsArticle Views106Altmetric-Citations56LEARN 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
Photoinduced Gratings in Functionalized Azo-Carbazole Compounds in Picosecond Regime (2008)

We report results of diffraction grating inscription on thin films prepared from epoxy resin doped with azo-carbazole based dyes. Diffraction gratings were recorded at the wavelength 532 nm and monitored through intensity of first order of diffraction (632 nm). Atomic force microscope scans of the gratings show that a surface relief grating also appeared.
A Model for Calculating the Characteristics of Separation of Transplutonium and Rare Earth Elements by High-Performance Liquid Chromatography (2018)

A mathematical model was developed for calculating the characteristics of a process for chromatographic separation of metals as applied to the problem of preparing pure transplutonium elements for their subsequent return into the fuel cycle or long-term storage. The model includes interrelated blocks allowing solution of the following problems: calculation of the separation factors of the mixture components, calculation of the installation parameters, determination of the distribution profile of the components being separated in the eluted fractions, determination of the dynamic characteristics of the process and of the volume and composition of the target products and by-products, estimation of thermal effects due to the heat evolution from the mixture components, and estimation of the extent to which the complexone degrades in the course of storage of the fractions. The model is being continuously improved. It meets the requirements of the process developers and is being refined in accordance with the newly obtained experimental data.
Attribute expression of mass transport deposits in an intraslope basin‐ A case study (2008)

Mass transport deposits (MTDs) are common features that help us reconstruct the depositional environment in deepwater basins. Unlike turbidite sands that form in similar environments, MTDs only rarely form hydrocarbon reservoirs. Near the water bottom, recent MTDs can indicate the risk of future hazards to submarine platform legs, drill stems, pipelines, and communication cables. MTDs commonly exhibit an overall chaotic seismic pattern; several other associated features help to differentiate MTDs from other kinds of deposits in deep water depositional environments. MTDs have similar characteristics in intraslope basins (also called salt minibasins) but vary as a function of restricted transport direction for sediment input, limited accommodation space, and syndepositional salt movement. By coupling principles of geomorphology with seismic attributes and a depositional model, we analyze the characteristics of an MTD within an offshore Gulf of Mexico study area to determine how it differs from other deepwater architectural elements.
Enhancement of the antiviral activity of pyrimidine derivatives against mengovirus by visible light. (1979)

Eleven pyrimido-pyrimidine derivatives, seven with significant antiviral activity against Mengovirus, five against Coxsackie B1 virus and four antiviral negative compounds were tested for their photosensitizing ability. All seven compounds with antiviral activity in vitro showed an enhanced antiviral action against Mengovirus under irradiation with visible light, a fact that may be caused by photodynamic processes. It was tried to correlate the oxidation potentials of sensitizers with their photodynamic activity. By means of mass-spectrometric investigations, molecular fragmentation was examined following thin layer chromatography (TCL) before and after irradiation. Furthermore, binding affinity to biopolymers (BSA and RNA) was investigated to reveal conformity in differences of antiviral activity. The main results are the following: 1. Generally, strong antiviral activity can be correlated with strong binding affinity. 2. No significant correlation could be detected between oxidation potentials of antiviral compounds and their enhanced antiviral activity under irradiation conditions, although in some cases sensitizer with higher oxidation potentials are more effective than those with lower ones. 3. The lower the photostability of the compounds the higher was the light-induced antiviral activity. 4. No alteration of the molecular ion peak and fragmentation pattern before and after irradiation was indicated by means of mass-spectrometry and TLC using fairly comparable conditions.
Thallium-201 for myocardial imaging. Relation of thallium-201 to regional myocardial perfusion. (1975)

Following intravenous administration, the myocardial concentration of tracer thallium-201, potassium-43, and rubidium-81 were determined in mice; thallium was present in the greatest concentration in the myocardium (2.08% compared 1.25% for potassium and 1.15% for rubidium at 10 minutes). The regional myocardial distribution of thallium-201 was determined in dogs under conditions of normal flow, and total occlusion, and compared with potassium-43 (r=0.97). The regional distribution of thallium-201 was compared to microspheres under conditions of partial occlusion and reactive hyperemia (r=0.97). Thallium-201 was evaluated in a series of phantom scans, which demonstrated that the low energy X-ray of thallium was suitable for imaging. These results suggest that thallium-201 can be used for the evaluation of the distribution of regional myocardial perfusion.
Design of a First Metatarsophalangeal Joint Simulator (2013)

The designed joint simulator is mechanically sound and may be used for wear testing of any type of first MPJ implant.
Contribution of the histaminergic receptor subtypes to histamine-induced cerebellar granular neurotoxicity. (2004)

In the present study, we investigated the effects of histamine and its specific H(1), H(2) and H(3) receptor blockers in cerebellar granular cell culture derived from rat pups. Histamine was applied at 10(-9),10(-8), 10(-7),10(-6), and 10(-5) M for 16 h into the cultures and the highest dose was found to be the most toxic one. Pheniramine (H(1) receptor blocker), ranitidine (H(2) receptor blocker) and thioperamide (H(3) receptor blocker) were applied at 10(-8), 10(-7), 10(-6), 10(-5) M into the flasks prior to histamine in the second step of the experiments. Also, the effect of all of the blockers together at 10(-5) M concentrations was tested on the toxicity induced by 10(-5) M histamine. The H(3) receptor blocker, thioperamide (10(-6) M) was demonstrated to be most effective histamine toxicity blocker. Histamine H(2) blocker, ranitidine, was found to attenuate histamine neurotoxicity at all doses tested, its most effective dose being the highest dose. On the other hand, H(1) blocker, pheniramine, was able to reverse the effect of histamine at 10(-6) and 10(-5) M, but it was found ineffective when given at 10(-9) and 10(-8) M. Combined application of H(1), H(2), and H(3) receptor blockers at 10(-5) M concentrations, 45 min before histamine addition into the flasks at 10(-5) M, was able to reduce cell death score but it was not as effective as H(3) blocker, thioperamide.
Neoplastic transformation in the planarian: II. Ultrastructure of malignant reticuloma (1986)

Cadmium and phorbol ester induced tumorigenesis in the planarian, Dugesia dorotocephala, develops as a cocarcinogenic process involving initiation and promotion in the progression of neoplastic disease. Treatment of intact planarians with sublethal concentrations of cadmium sulfate and 12-O-tetradecanoylphorbol-13-acetate (TPA) induced a type of infiltrating tumor that proved to be potentially lethal. Surgical transplantation of such tumorous tissues into otherwise healthy planarians resulted in the same histopathological progression to lethality, which confirmed the metastatic nature of the neoplasia. Electron microscopic studies revealed that both the chemically-induced and the transplantation-based tumors involved, exclusively, the proliferation and differentiation of abnormal reticular cells, referred to as reticuloma cells. Reticular cells normally are ameboid, phagocytic, and are thought to provide the planarian with a phylogenetic predecessor of an immune surveillance system. A considerable incidence of mitosis was observed within the tumor areas; and the sequence of differentiation, from transformed stem cells to mature but nonfunctional reticuloma cells, was elucidated. This profile of differentiation supports the concept of cellular derivation via stem cell dynamics as opposed to dedifferentiation. A variety of ultrastructural abnormalities were characterized: several of which tend to substantiate the anaplastic quality of the reticuloma, while others are more specifically diagnostic for malignancy. These findings further extend the potential usefulness of the planarian malignant reticuloma as a model system for the study of neoplastic stem cell diseases.
Optimizing parallel bitonic sort (2002)

Sorting is an important component of many applications, and parallel sorting algorithms have been studied extensively in the last three decades. One of the earliest parallel sorting algorithms is bitonic sort, which is represented by a sorting network consisting of multiple butterfly stages. The paper studies bitonic sort on modern parallel machines which are relatively coarse grained and consist of only a modest number of nodes, thus requiring the mapping of many data elements to each processor. Under such a setting optimizing the bitonic sort algorithm becomes a question of mapping the data elements to processing nodes (data layout) such that communication is minimized. The authors developed a bitonic sort algorithm which minimizes the number of communication steps and optimizes the local computation. The resulting algorithm is faster than previous implementations, as experimental results collected on a 64 node Meiko CS-2 show.
Thermal dynamic processing of polyaniline with dodecylbenzene sulfonic acid (1997)

To attain an intrinsically conductive and processible polymer, polyaniline (PANI)/dodecylbenzene sulfonic acid (DBSA) blends of several compositions were processed at various elevated temperatures in a Brabender plastograph. The blends' temperatures during processing, as affected by the blends' composition and initial process temperature, were monitored. Accordingly, the process includes the following main stages: heating the blend, exothermic PANI-DBSA doping reaction accompanied by a paste to a solidlike transition, and plasticization of the resulting PANI/DBSA complex by the excess DBSA. Composition analysis of the process products sampled at the various stages showed that the initial blends, prior to their thermal processing, already consisted of partially doped PANI particles, having a core/shell structure; the core consists of PANIbase and the shell of PANI(DBSA)0.32 complex. In addition, at the paste-to-solidlike transition, the doping reaction is completed; further mixing does not affect the complex composition, but results in conductivity reduction. The morphology of the blends sampled at the various processing stages was studied by electron microscopy. From the conductivity and processibility point of view, optimal PANI/DBSA blend composition and processing temperature were identified. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 2199–2208, 1997
Family history month (2006)

As more and more families move around, people begin to think about who they are and where they come from. This assembly explores those themes
Gel Forming Characteristics of Frozen Surimi from Chum Salmon in the Presence of Protease Inhibitors (1995)

ABSTRACT When salted surimi paste of chum salmon was incubated at 20–60°C, a marked loss of the breaking strength of heat‐induced gel occurred simultaneously with breakdown of myosin heavy chain, but this was effectively suppressed by addition of cysteine protease inhibitors or bovine plasma powder. In the presence of protease inhibitor, the surimi gels were formed at relatively low temperatures showing highest gel strength at incubations of 50 and 60°C. Chum salmon surimi showed no evidence of suwari and no myosin heavy chain cross‐linking.
Initiative Patterns in Dialogue Genres (2014)

One of the ways of distinguishing different dia-logue genres is the differences in patterns of in-teractions between the participants. Morbini et al (2013) informally define dialogue genres on the basis of features like user vs system initiative, amongst other criteria. In this paper, we apply the multi-label initiative annotation scheme and related features from (Nouri and Traum, 2014) to a set of dialogue corpora from different domains. In our initial study, we examine two question-answering domains, a “slot-filling ” service appli-cation domain, and several human-human negoti-ation domains. 2 Dialogue Domains The Twins are two life-size virtual characters
Purchasing power parity for 10 Latin American integration association countries: panel SURKSS tests (2010)

This empirical study applies panel SURKSS tests, proposed by Wu and Lee (2009 Wu, J. L. and Lee, H. Y. 2009. A revisit to the non-linear mean reversion of real exchange rates: evidence from a series-specific non-linear panel unit-root test. Journal of Macroeconomics, forthcoming[Crossref], [Web of Science ®] , [Google Scholar]), to investigate the properties of long-run Purchasing Power Parity (PPP) in a sample of 10 Latin American Integration Association (LAIA) countries over the period January 1980 to September 2008. The empirical results from several panel-based unit root tests indicate that PPP does not hold for the LAIA-10 countries under study; however, panel SURKSS tests indicate that PPP is valid for half of these LAIA-10 countries. These results have important policy implications for these LAIA-10 countries under study.
Solid lipid nanoparticles of ciprofloxacin hydrochloride with enhanced antibacterial activity (2012)

Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran Department of Drug and Food Control and Pharmaceutical Quality Assurance Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran Novel Drug Delivery Systems Lab., Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran