gebhart/patrepeval huggingface dataset:
Preparation of high crystalline nanoparticles of rare-earth based complex pervoskites and comparison of their structural and magnetic properties with bulk counterparts:Paper (2017)

A simple route to prepare Gd0.7Sr0.3MnO3 nanoparticles by ultrasonication of their bulk powder materials is presented in this article. For comparison, Gd0.7Sr0.3MnO3 nanoparticles are also prepared by ball milling. The prepared samples are characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray (EDX), X-ray photoelectron spectroscope (XPS), and superconducting quantum interference device (SQUID) magnetometer. XRD Rietveld analysis is carried out extensively for the determination of crystallographic parameters and the amount of crystalline and amorphous phases. FESEM images demonstrate the formation of nanoparticles with average particle size in the range of 50–100 nm for both ultrasonication and 4 h (h) of ball milling. The bulk materials and nanoparticles synthesized by both ultrasonication and 4 h ball milling exhibit a paramagnetic to spin-glass transition. However, nanoparticles synthesized by 8 h and 12 h ball milling do not reveal any phase transition, rather show an upturn of magnetization at low temperature. The degradation of the magnetic properties in ball milled nanoparticles may be associated with amorphization of the nanoparticles due to ball milling particularly for milling time exceeding 8 h. This investigation demonstrates the potential of ultrasonication as a simple route to prepare high crystalline rare-earth based manganite nanoparticles with improved control compared to the traditional ball milling technique.
Activation of cytokine genes in HIV-1 infected myelomonoblastic cells by phorbol ester and tumor necrosis factor (1992)

The differential production of inflammatory cytokines (IL-1 alpha, IL-1 beta, IL-6, and TNF-alpha) was analyzed in the PLB-985 myelomonoblastic cell line, chronically infected or not by the IIIB strain of HIV-1. After treatment with phorbol ester (PMA) or TNF-alpha, a 20- to 40-fold increase in the level of IL-1 beta mRNA was observed in the HIV-infected PLB-IIIB as compared with the parental PLB-985 cells. The majority of the IL-1 beta activity detected in both cell types remained cell associated. In contrast, TNF-alpha mRNA levels were increased in both infected and uninfected cells; the t1/2 of TNF RNA was 90 min in uninfected cells and 30 min in HIV-infected cells. Interestingly, about 14-fold more TNF activity was secreted from PLB-IIIB than from similarly stimulated PLB-985 cells, indicating an enhanced translational efficiency of TNF RNA in PLB-IIIB cells. The PMA- or TNF-induced levels of IL-1 alpha mRNA did not vary significantly between the two cell types whereas IL-6 was poorly inducible in both cells. These results illustrate a differential cytokine response to HIV-1 infection in myeloid cells and demonstrate that HIV-1 infection of myelomonoblastic cells may alter both transcriptional and translational mechanisms controlling cytokine expression.
Fretting in Ni-coated aluminum conductors (1991)

The degradation of nickel-coated aluminum conductors in contact with aluminum, copper, nickel, and tin under fretting conditions has been studied. In addition to contact resistance measurements, scanning electron microscopy (SEM) and X-ray fluorescence (EDX) analysis were used to study the process involved. The fretting tests were carried out with a simulated connector configuration at a frequency of oscillation of 1 Hz and contact loads of 2 and 10 N. The effects of fretting slip amplitude, contact load, and lubrication were evaluated. The results showed that fretting adversely affects the contact resistance of nickel-coated aluminum conductors, which shows a rapid increase and substantial fluctuations with fretting time. The effects of fretting were reduced to some extent by decreasing the slip amplitude and increasing the contact load and lubrication. SEM and EDX analysis revealed that considerable damage of the contact zones resulted from the fretting action and substantial exchange of material occurred in nonlubricated joints.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
The Effect of Rancid Oils on Lymphoid Tissues (1990)

Among the oxidation products of edible fats and oils, lipid hydroperoxides and the low-molecular-weight compounds containing short-chain aldehydes such as 4-hydroxynonenal are absorbed from the intestinal wall and carried into the internal organs with oral administration to rodents. Oral intake of lipid hydroperoxides or the low-molecular-weight compounds causes significant cytotoxic damage to the lymphoid tissues. The DNA synthesis of thymocytes is remarkably depressed and lymphocyte necrosis is observed in the thymus and intestinal Peyer's patches. In these cases, the mitogenic response to concanavalin A of splenocytes is increased. With long-term (90 d) feeding of slightly autoxidized soybean oil (peroxide value ; 150 meq/kg) in mice, the same symptoms as those mentioned above are observed. These findings indicate that oral intake of rancid oils give significant effects on immunocompetent cells and causes depression of the DNA synthesis of thymocytes, which would be one of the major cause for impairing immunocompetent systems in animals.
Fetal sheep adrenal blood flow responses to hypoxemia after splanchnicotomy using fluorescent microspheres (1998)

Adrenal gland blood flow (ABF) increases during hypoxemia in fetal sheep, but regulation of ABF is poorly understood. The purpose of this study was to determine the effects of splanchnic nerve section on fetal ABF responses to hypoxemia using the fluorescent microsphere (FM) technique. At 125 days of gestation, 14 unanesthetized fetal sheep [bilateral splanchnicotomy (Splx, n = 6) and control (Cont, n = 8)] were injected with FM before and at 60 min of N2-induced hypoxemia (approximately 40% decrease in fetal arterial PO2). Adrenal tissue and reference blood samples were digested and filtered, and FM dye was extracted for spectrometer analysis. Baseline whole, medullary, and cortical ABF for the Cont group were similar to published values using radioactive microspheres and did not differ from Splx values. Hypoxemia increased whole, medullary, and cortical ABF (mean +/- SE) from baseline for the Cont group by 281 +/- 35, 258 +/- 31, and 496 +/- 81% (P < 0.05). The increase for the Splx group was attenuated compared with the Cont group (P < 0.05) for whole and medullary ABF (139 +/- 27 and 43 +/- 27%) but not cortical ABF (326 +/- 91%). We conclude that 1) the FM technique is valid for measuring fetal ABF and 2) in fetal sheep the splanchnic nerve is not necessary to maintain basal ABF but plays an important role in regulating the hypoxemia-induced increase in ABF through the medullary, but not cortical, ABF response.
Structural Properties of Fractionated Starch Polymers and Their Dependence on the Dissolution Process (1996)

A combination of sedimentation field flow fractionation (SdFFF) with multiangle laser light scattering (MALLS) was applied to the grain level destructured potato and waxy corn starch in solution. The molar mass and radius distributions were obtained simultaneously. Separation was observed for a radii range of 50−500 nm. Degradation upon heat exposure was found depending mainly on the exposure time and less on the temperature. A detailed analysis of the particle scattering factors (angular dependence of the scattered light) revealed small differences in the internal structure of potato and waxy corn starches. Both starches showed the behavior of only weakly swollen, branched clusters. Potato starch appeared to be slightly more expanded than waxy corn starch. Self-similar structures were observed with fractal dimensions of 2.4 ± 0.1. The deviations from theoretical predictions using the mean field approximation could result from excluded volume effects and heterogeneity in branching.
Identification of tumor-associated cassette exons in human cancer through EST-based computational prediction and experimental validation (2010)

This study presents a novel computational methodology for the identification of tumor-associated transcript variants to be used as cancer molecular biomarkers, provides its experimental validation, and reports specific biomarkers for glioblastoma.
Summary and Comments on the Conference (1973)

Journal Article Summary and Comments on the Conference Get access Maxwell Finland, Maxwell Finland Search for other works by this author on: Oxford Academic PubMed Google Scholar Edward H. Kass Edward H. Kass Search for other works by this author on: Oxford Academic PubMed Google Scholar The Journal of Infectious Diseases, Volume 128, Issue Supplement_3, November 1973, Pages S792–S816, https://doi.org/10.1093/infdis/128.Supplement_3.S792 Published: 01 November 1973
N° 234. — Viscosimètre à mesures relatives pour étude de H<sub>2</sub>S gazeux au voisinage du point critique (1969)

Avec de légères modifications le viscosimètre que nous avons déjà utilisé pour l’étude du méthane et de l’argon à des températures inférieures à 100°, nous a permis d’entreprendre l’étude de la viscosité de H2S gazeux, entre 105 et 140° jusqu’à des pressions de 500 bars. Les résultats obtenus ne peuvent être exploités du point de vue théorique en raison du manque de données numériques relatives aux autres propriétés physiques du gaz étudié.
Kinetic preference between the diastereotopic hydrogens in the lithiation of benzyl methyl and benzyl tert-butyl sulfoxides (1973)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic preference between the diastereotopic hydrogens in the lithiation of benzyl methyl and benzyl tert-butyl sulfoxidesR. Viau and T. DurstCite this: J. Am. Chem. Soc. 1973, 95, 4, 1346–1347Publication Date (Print):February 1, 1973Publication History Published online1 May 2002Published inissue 1 February 1973https://pubs.acs.org/doi/10.1021/ja00785a062https://doi.org/10.1021/ja00785a062research-articleACS PublicationsRequest reuse permissionsArticle Views58Altmetric-Citations31LEARN 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
Lifetimes of AMTEC electrodes: Molybdenum, rhodium-tungsten, and titanium nitride (2000)

The lifetime of three types of AMTEC electrodes is predicted from the rate of grain growth in the electrode. Grain size is related to electrode performance, allowing performance to be correlated with grain growth rate. The rate of growth depends on physical characteristics of each material, including the rates of surface self-diffusion and molecule mobility along grain boundaries. Grain growth rates for molybdenum, rhodium-tungsten and titanium nitride electrodes have been determined experimentally and fit to models in order to predict operating lifetimes of AMTEC electrodes. For lifetimes of 10 years or more, RhxW electrodes may be used at any operating temperature supportable by the electrolyte. TiN electrodes may be used in AMTEC cells only at operating temperatures under 1150 K, and Mo may be used only below 1100 K.
The Concentration of Arginine Vasopressin in Pituitary Stalk Plasma of the Rat after Adrenalectomy or Morphine<sup>*</sup> (1986)

We have investigated the role of adrenal steroids and the opiates in regulating arginine vasopressin (AVP) secretion into the pituitary stalk blood of the rat. The portal plasma concentration of AVP in urethane-anesthetized male rats was 532 +/- 68 pg/ml (mean +/- SEM), while the peripheral plasma AVP concentration in intact urethane-anesthetized rats was 20.7 +/- 5.7 pg/ml. Column chromatography on Sephadex G-25 of an extract of a pool of portal plasma revealed that the material being assayed comigrated with synthetic AVP. Bilateral adrenalectomy (ADX) 5 days before the collection of portal blood elevated portal plasma AVP concentrations approximately 6-fold (655 +/- 124 pg/ml in controls vs. 4090 +/- 504 pg/ml in adrenalectomized animals). Dexamethasone administration (15 micrograms/kg X day) for 5 days prevented the ADX-induced increase in portal plasma AVP concentrations without significantly changing portal plasma AVP concentrations in intact rats. Portal plasma concentrations of beta-endorphin were not changed by ADX or dexamethasone treatment. The iv infusion of morphine sulfate (3 mg/kg) dramatically decreased the concentration of AVP in the portal plasma of the rat (501 +/- 101 pg/ml before morphine vs. 185 +/- 50 pg/ml after morphine). The inhibitory effect of morphine was reversed by naltrexone (1.0 mg/kg), whereas naltrexone alone did not alter AVP secretion. Morphine administration also decreased systemic plasma AVP concentrations in urethane-anesthetized rats (27.1 +/- 6.6 pg/ml in controls vs. 3.3 +/- 1.3 pg/ml in morphine-treated rats). Naltrexone treatment reversed this effect. These results suggest that AVP secretion into pituitary stalk blood is under the inhibitory influence of the adrenal steroids, and the increased concentration of AVP found in portal blood may be partially responsible for the elevated levels of ACTH after ADX. Furthermore, morphine-induced activation of the pituitary-adrenal axis is apparently independent of hypothalamic AVP secretion.
Modeling of Bendable MAV Wing Using Energy Method (2008)

Out of many exciting and unique micro air vehicles (MAVs) being developed at the University of Florida, one MAV design utilizes a bendable wing concept. To minimize the storage volume, the wing is rolled and the MAV is stored inside a canister. To predict the shape of the wing and consequently initial strain produced in the wing, when it is stored inside canister, energy method principal is used. An analytical model is developed which predicts the shape and initial strains in the wing by modeling the wing as a one dimensional composite beam. Results of the analytical model prediction are compared with the experimental observations.
Enhanced Activation of Mitogen-activated Protein Kinase and Myosin Light Chain Kinase by the Pro33 Polymorphism of Integrin β3 (2003)

Integrin beta(3) is polymorphic at residue 33 (Leu(33) or Pro(33)), and the Pro(33) variant exhibits increased outside-in signaling to focal adhesion kinase and greater actin reorganization. Because focal adhesion kinase activation and an intact cytoskeleton are critical links for integrin-mediated signaling to MAPK, we explored the role of integrin alpha(IIb)beta(3) in this signaling using Chinese hamster ovary and human kidney 293 cell lines expressing either the Leu(33) or Pro(33) isoform of beta(3). Compared with Leu(33) cells, Pro(33) cells demonstrated substantially greater activation of ERK2 (but not MAPK family members JNK and p38) upon adhesion to immobilized fibrinogen (but not fibronectin) and upon integrin cross-linking. ERK2 activation was mediated through MAPK kinase and required phosphoinositide 3-kinase signaling and an intact actin cytoskeleton. Human platelets and Chinese hamster ovary cells expressing the Pro(33) isoform showed enhanced activation of the ERK2 substrate myosin light chain kinase (MLCK) upon adhering to fibrinogen. Furthermore, compared with platelets and cells expressing the Leu(33) isoform, the Pro(33) variant showed greater alpha-granule release, clot retraction, and adhesion to fibrinogen under shear stress, and these functional differences were abolished by MLCK and MAPK kinase inhibition. Post-integrin occupancy signaling through MAPK and MLCK after alpha(IIb)beta(3) cross-linking may explain in part the increased adhesive properties of the Pro(33) variant of integrin beta(3).
Extra‐cellular thiol metabolism in clones of human metastatic melanoma with different gamma‐glutamyl transpeptidase expression: Implications for cell response to platinum‐based drugs (2002)

Thiol redox status can affect important functions both intracellularly and extracellularly. The plasma membrane enzyme γ-glutamyl transpeptidase (GGT), which plays a crucial role in cellular handling of thiols, is often expressed in malignant tumors, including melanoma, although its expression levels may vary widely among different tumors or cells of the same tumor. In an attempt to better understand the functional significance of GGT overexpression, we have examined the relationships between intra- and extra-cellular thiol metabolism and GGT expression. Intra- and extra-cellular distribution of glutathione and other low mol. wt. thiols and disulfides was investigated in two different Me665/2 human melanoma clones that originated from the same metastasis, but exhibiting high (2/60 clone) and low (2/21 clone) GGT activity. Intracellular content of glutathione was lower in GGT-rich 2/60 cells, in spite of high GGT expression. A lower utilization of extracellular cystine was also observed in these cells. In both clones, a direct secretion of cysteine in the extracellular medium was detected, which was independent of GGT-mediated catabolism of extracellular glutathione. Substantial amounts of glutathione, GSSG and glutathione-cysteine disulfide were accumulated extracellularly only in the case of GGT-poor 2/21 cells, while the same event was apparent in 2/60 cells only after the following inhibition of GGT activity. When exposed to the trinuclear platinum compound BBR 3464 or hydrogen peroxide, which are very reactive for sulfur-containing nucleophiles, the 2/60 clone showed higher sensitivity than the 2/21 clone to both agents. These results suggest that the clone-specific balance between transport of sulfur aminoacids and GGT activity results in profound differences in the capability of each clone to modify the thiol redox status of the extracellular milieu. The finding may have important implications in tumor cell behavior with particular reference to chemosensitivity, since thiols are recognized factors in modulation of cell sensitivity to platinum-based anticancer drugs. © 2002 Wiley-Liss, Inc.
Physiological Attributes of Microbial BTEX Degradation in Oxygen-Limited Environments (1995)

Our work has focused on the determination of physiological traits that may facilitate in situ degradation of xenobiotic compounds by indigenous microorganisms.For this our interests center on the following questions: What are the ambient conditions in a benzene, toluene, ethylbenzene, and xylene (BTEX)-contaminated aquifer?What is the behavior of indigenous bacteria under these conditions?What are the attributes of bacterial strains that are functional under hypoxic conditions?How do these strains compare with other BTEX-degrading strains? -
Room temperature reversible tuning of magnetism of electrolyte-gated La0.75Sr0.25MnO3 nanoparticles (2013)

Reversible control of magnetization and Curie temperature (TC) by electrostatic modulation of the surface charge carrier density is presented for the strongly correlated La0.75Sr0.25MnO3 (LSMO) system. The nanoparticulate LSMO was synthesized by spray pyrolysis. A controlled post annealing was carried out to obtain a sharp magnetic transition slightly above room temperature along with favorable surface-to-volume ratios. Resulting nanoporous LSMO was electrostatically charged using a non-aqueous electrolyte with applied voltage limited within the purely capacitive window. The electrostatic charging effect on magnetization was investigated around TC for varying temperatures and applied magnetic fields. The resultant magnetization modulation upon charging is discussed in terms of the reversible electrostatic hole doping.
CHROMOSOMAL LOCATION OF THYMINE AND ARGININE GENES IN <i>ESCHERICHIA COLI</i> AND AN F′ INCORPORATING THEM (1964)

Ishibashi, Masahide (Osaka University, Osaka, Japan), Yoshinobu Sugino, and Yukinori Hirota. Chromosomal location of thymine and arginine genes in Escherichia coli and an F' incorporating them. J. Bacteriol. 87:554-561. 1964.-The gene responsible for thymine requirement or independence in Escherichia coli K-12 is located on the chromosome, near Arg(2) (arginine) and between Sm (streptomycin) and Ade (adenine). A new F' (called F(15)) carrying the Thy (thymine) gene as well as the Arg(2) gene was discovered. The Thy(+) (thymine independent) gene on F(15) relieves the defect of all Thy(-) (thymine requiring) mutants of E. coli examined, such as E. coli 15 T(-), B3, and Thy(-) mutants obtained by aminopterine treatment. It can also be transferred to Thy(-) mutants of Salmonella typhimurium and Serratia marcescens, converting them to Thy(+).
ChemInform Abstract: Structure, Conductivity, and Magnetic Properties of (Phthalocyaninato)nickel(II) Bromide. (1986)

Abstract The title compound has been prepared by the oxidation of phthalocyaninatonickel with Br 2 .
ChemInform Abstract: Optical Resolution of 2′‐Methoxy‐1,1′‐binaphthyl‐2‐carboxylic Acid, and Application as Chiral Derivatizing Agent for HPLC Separation of Enantiomeric Alcohols and Amines. (1989)

Abstract The (aS) title compound (Ia), obtained by resolution of the racemate by use of (‐)‐menthol, is converted to its acid chloride (Ib).
Unsupervised Semantic Similarity Computation using Web Search Engines (2007)

In this paper, we propose two novel web-based metrics for semantic similarity computation between words. Both metrics use a web search engine in order to exploit the retrieved information for the words of interest. The first metric considers only the page counts returned by a search engine, based on the work of [1]. The second downloads a number of the top ranked documents and applies "widecontext" and "narrow-context" metrics. The proposed metrics work automatically, without consulting any human annotated knowledge resource. The metrics are compared with WordNet-based methods. The metrics' performance is evaluated in terms of correlation with respect to the pairs of the commonly used Charles - Miller dataset. The proposed "wide-context" metric achieves 71% correlation, which is the highest score achieved among the fully unsupervised metrics in the literature up to date.
Biology of the Endothelium (1997)

The endothelium releases factors that control vascular relaxation and contraction, thrombogenesis and fibrinolysis, and platelet activation and inhibition. Maintaining the functional integrity of the endothelium, therefore, is critical for the preservation of blood flow and the prevention of thrombosis. This article reviews the primary endothelium‐dependent substances that promote either relaxation (e.g., nitric oxide, prostacyclin) or contraction (e.g., endothelin) of blood vessels, including their physiology, mechanism of effect, and role in endothelial dysfunction. Risk factors for cardiovascular disease, such as hypertension, hypercholesterolemia, diabetes, vascular aging, and estrogen deficiency, are discussed in terms of their contributions to endothelial dysfunction, which may be the initial step in atherogenesis.