gebhart/patrepeval huggingface dataset:
Cell cycle and transmembrane mitochondrial potential analysis after treatment with chromium(iii), iron(iii), molybdenum(iii) or nickel(ii) and their mixtures (2018)

The aim of this study was to examine the effect of chromium(iii), iron(iii), molybdenum(iii) and nickel(ii) and their combinations on the cell cycle and mitochondrial transmembrane potential (MTP) in BALB/3T3 and HepG2 cells. A statistically significant dose related decrease of the percentage of cells in the G0/G1 and S phases was observed. However, a statistically significant dose related increase of the percentage of cells in the G2/M phase after exposure to chromium(iii), nickel(ii) or molybdenum(iii) at 200-1000 μM concentrations in both cell lines was observed. Moreover, an increase of the percentage of cells in the subG1 phase was observed. In both cell lines a statistically significant dose related decrease of the percentage of cells in the G2/M phase after exposure to iron(iii) at 200-1000 μM concentrations was observed. However, a statistically significant dose related increase of the percentage of cells in the G0/G1 phase after exposure to iron(iii) at 200-1000 μM concentrations was observed. A concentration dependent statistically significant decrease in the level of the MTP was observed in both cell lines after exposure to chromium(iii), iron(iii), nickel(ii) and molybdenum(iii). The results obtained from both cell lines show that HepG2 cells are more sensitive when compared to BALB/3T3 cells. Additions of Cr(iii) at 200 μM plus Fe(iii) at 1000 μM showed a synergistic effect on the cell cycle and MTP. In the case of Cr(iii) at 200 μM plus Mo(iii) at 1000 μM, an antagonistic effect was observed in both analyses. In the case of Cr(iii) at 1000 μM plus Mo(iii), Ni(ii) and Fe(iii) at 200 μM, no changes in the percentage of cells in all phases were observed in both cell lines in both analyses.
Isolation of enzyme cDNA clones by enzyme immunodetection assay: isolation of a peptide acetyltransferase. (1987)

The biological activity of many proteins and peptides can be profoundly affected by enzyme-catalyzed covalent modifications such as acetylation, sulfation, glycosylation, or amidation. This article describes the cloning of such an enzyme, a peptide acetyltransferase from rat brain that catalyzes the amino-terminal acetylation of endorphins and perhaps other substrates in vivo. Blot-hybridization analysis suggests that the mRNA encoding the acetyltransferase is approximately 2.0 kilobases, is present in whole rat brain and rat hypothalamus, and is slightly larger in mouse AtT20 tumor cells. The acetyltransferase was cloned by using a strategy whereby a cDNA expression library was screened with a solid-phase enzyme-activity assay; this technique combines the use of the substrate coupled to a solid support and subsequent recognition of the product by using a specific antiserum. We have called this method the enzyme immunodetection assay (EIDA). The EIDA should prove useful in the isolation of other clones for proteins that possess enzymatic activity upon expression in bacterial hosts.
Preparation, structure, and stability of Pt and Pd monolayer modified Pd and Pt electrocatalysts (2009)

A controlled surface reaction technique has been successfully employed to prepare a series of Pt modified Pd/C (Pt/Pd/C) and Pd modified Pt/C (Pd/Pt/C) catalysts. The resulting catalyst materials were characterised by TEM, XRD, electrochemistry, and EXAFS techniques. In the case of the Pd/Pt/C carbon catalysts, core-shell structural arrangements were found, with a 0.04 A contraction of the Pd-Pd bond distance for the 1 Pd/Pt/C being observed. A greater degree of alloying was found for the Pt/Pd/C catalysts where the surface had a mixed composition with a large proportion of the Pt in the interior of the nanoparticle. However, strong Pt characteristics were exhibited in the voltammetry of Pt/Pd/C catalysts, most notably a large increase in the stability with respect to the electrochemical environment compared to Pd alone.
Predictive Control Algorithm Technique for Multilevel Asymmetric Cascaded H-Bridge Inverters (2008)

Predictive control algorithms have been proposed for power electronic converters, featuring a high performance in terms of dynamic behavior. This is true due mainly to the accurate modeling and the finite set of inputs or possible switching combinations. However, when it is used in multilevel converters, the dynamic performance is degraded, because the optimization algorithm needs to evaluate and search over a large number of possible switching combinations. In this paper, a predictive control algorithm, which exhibits high dynamic performance for multilevel converters, is proposed. The algorithm reduces the complexity of calculations and the number of possible combinations, allowing the use of predictive control with a large number of switching states. Experimental results on a 27-level asymmetric multicell converter, which validate the proposed algorithm, are presented.
ChemInform Abstract: REAKTIVITAET PROTONIERTER AMINYL‐RADIKALE, KONKURRENZ ZWISCHEN DER REAKTION VON HOFMANN‐LOEFFLER UND DER RADIKALISCHEN HETEROCYCLISIERUNG VON ALPHA,BETA‐UNGESAETTIGTEN N‐CHLORAMINEN (1975)

Abstract Unter Reaktionsbedingungen, bei denen beide im Titel angegebenen Prozesse verlaufen können, wird gezeigt, daß das Radikal ausschließlich die intramolekulare Addition an die Doppelbindung bevorzugt.
ADAMTS‐1 cleaves a cartilage proteoglycan, aggrecan (2000)

A disintegrin-like and metalloproteinase with thrombospondin type I motifs-1 (ADAMTS-1) is an extracellular matrix-anchored metalloproteinase. In this study we have demonstrated that ADAMTS-1 is able to cleave a major cartilage proteoglycan, aggrecan. N-terminal sequencing analysis of the cleavage product revealed that ADAMTS-1 cleaves the Glu(1871)-Leu(1872) bond within the chondroitin sulfate attachment domain of aggrecan. In addition, deletional analysis demonstrated that the C-terminal spacer region of ADAMTS-1 is necessary to degrade aggrecan. These results suggest that ADAMTS-1 may be involved in the turnover of aggrecan in vivo.
A Review on Recovery of Copper and Cyanide From Waste Cyanide Solutions (2013)

The mainstream technology for leaching gold from gold ore is still leaching in aqueous alkaline cyanide solution. However, when copper minerals are present in the gold ore, high levels of free cyanide must be maintained during leaching because many common copper minerals react with cyanide, forming copper cyanide complexes that deplete the solution of free cyanide. This results in a significant economical penalty through excessive cyanide consumption and loss of valuable copper in tails. Environmental constraints controlling the discharge of cyanide from mining industry are being tightened by local governments worldwide. The solution chemistry of copper in cyanide solution and various technologies for the recovery of copper and cyanide from barren gold cyanide solutions were reviewed in the paper. Direct recovery methods are mainly based on the acidification–volatilization–reneutralization (AVR) process or its modifications. These processes are not very efficient for treating low cyanide solutions and high metal cyanide solutions due to their substantial operational cost. Indirect recovery technologies by activated carbon, ion-exchange resins (IX) and solvent extraction (SX) have been extensively studied. The basic principle of these technologies is to pre-concentrate copper (and part of cyanide) into a small volume of eluant or stripping solution. The copper and cyanide in the resulted solutions can be further recovered by AVR or similar processes or by the electrowinning process. Activated carbon is only suitable for use as a polishing process to remove cyanide to lower levels from those cyanide solutions where the cyanide content is already low. Compared to activated carbon, ion exchange resins are less easily poisoned by organic matter and can usually be eluted at room temperature, and selectivity for particular metals can be achieved by the choice of the functional group incorporated into the bead or by the selective elution process. Solvent extraction process developed base on guanidine and modified quaternary amines exhibit relative fast extraction kinetics and can be operated in a continuous manner. It will be necessary to thicken and wash the solids in order to produce a clarified feed solution while treating the slurry from operations using carbon-in-pulp (CIP) for the recovery of gold. Other copper and cyanide recovery technologies such as biosorption or direct electrowinning were also proposed, but they have still not found their way to practical application.
Recognition of an antiparallel β‐sheet structure of human epidermal growth factor by its receptor Site‐directed mutagenesis studies of Ala‐30 and Asn‐32 (1992)

The Ala-30 and Asn-32 residues involved in the major antiparallel beta-sheet structure of human epidermal growth factor (hEGF) were substituted with various amino acid residues, and the receptor-binding affinities of the nine variant hEGFs were determined by the use of human KB cells. The Ala-30----Arg, Ala-30----His and Ala-30----Phe substitutions drastically reduced the binding affinity, suggesting that the side chain in position 30 of Ala-30 of hEGF is required to be small for the receptor binding. The Asn-32----Asp substitution significantly reduced the binding affinity, while the Asn-32----His variant could bind to the receptor as well as to the wild-type hEGF. Therefore, it seems to be important for receptor binding that the side chain in position 32 does not have a negative charge but does have an NH group. Thus, we propose that, in the ligand-receptor complex, the receptor recognizes, on one side of the antiparallel beta-sheet structure of hEGF, a wider contact area than previously suggested.
Evaluation of Coatings for Mg Alloys for Biomedical Applications (2014)

The aim of this work was to assess a number of coatings developed for Mg for biomedical applications. The Mg substrates were high‐purity (HP) Mg and ME10, an alloy recently developed for improved extrudability. The research utilized the new fishing‐line specimen configuration to allow direct comparison to our recent in vivo and in vitro measurements. The in vitro measurements were immersion tests of fishing‐line specimens immersed in Nor's solution at 37 °C. Tests of substantial duration are needed because the corrosion rates of uncoated samples are low. Nor's solution is the designation given to Hank's solution through which CO 2 is bubbled at a partial pressure of 0.009 atm. In this solution, pH is maintained constant by the interaction of CO 2 and the bicarbonate ions in the solution. This is the same buffer as that which maintains the pH of blood. Coatings examined were: (i) an anodization using a bio‐friendly alkaline electrolyte consisting of phosphate, borate, and metasilicate, (ii) octyltrimethoxysilane (OSi), (iii) 1,2‐bis[triethoxysilyl]ethane (BTSE), (iv) anodization + OSi, and (v) anodization + BTSE. The performance of coated samples was comparable to or better than that of the uncoated samples, and there was a substantially better performance for the ME10 samples after anodization + OSi. Reasons for the various performances are discussed.
La[N(SiMe3)2]3-Catalyzed Deoxygenative Reduction of Amides with Pinacolborane. Scope and Mechanism (2020)

Tris[<i>N,N</i>-bis(trimethylsilyl)amide]lanthanum (La<sup>NTMS</sup>) is an efficient and selective homogeneous catalyst for the deoxygenative reduction of tertiary and secondary amides with pinacolborane (HBpin) at mild temperatures (25-60 °C). The reaction, which yields amines and O(Bpin)<sub>2</sub>, tolerates nitro, halide, and amino functional groups well, and this amide reduction is completely selective, with the exclusion of both competing inter- and intramolecular alkene/alkyne hydroboration. Kinetic studies indicate that amide reduction obeys an unusual mixed-order rate law which is proposed to originate from saturation of the catalyst complex with HBpin. Kinetic and thermodynamic studies, isotopic labeling, and DFT calculations using energetic span analysis suggest the role of a [(Me<sub>3</sub>Si)<sub>2</sub>N]<sub>2</sub>La-OCHR(NR'<sub>2</sub>)[HBpin] active catalyst, and hydride transfer is proposed to be ligand-centered. These results add to the growing list of transformations that commercially available La<sup>NTMS</sup> is competent to catalyze, further underscoring the value and versatility of lanthanide complexes in homogeneous catalysis.
Free Volume and Permeability of Mixed Matrix Membranes Made from a Terbutil-M-terphenyl Polyamide and a Porous Polymer Network (2022)

A set of thermally rearranged mixed matrix membranes (TR-MMMs) was manufactured and tested for gas separation. These membranes were obtained through the thermal treatment of a precursor MMM with a microporous polymer network and an o-hydroxypolyamide,(HPA) created through a reaction of 2,2-bis(3-amino-4-hydroxyphenyl)-hexafluoropropane (APAF) and 5'-terbutil-<i>m</i>-terfenilo-3,3″-dicarboxylic acid dichloride (tBTmCl). This HPA was blended with different percentages of a porous polymer network (PPN) filler, which produced gas separation MMMs with enhanced gas permeability but with decreased selectivity. The thermal treatment of these MMMs gave membranes with excellent gas separation properties that did not show the selectivity decreasing trend. It was observed that the use of the PPN load brought about a small decrease in the initial mass losses, which were lower for increasing PPN loads. Regarding the glass transition temperature, it was observed that the use of the filler translated to a slightly lower Tg value. When these MMMs and TR-MMMs were compared with the analogous materials created from the isomeric 5'-terbutil-<i>m</i>-terfenilo-4,4″-dicarboxylic acid dichloride (tBTpCl), the permeability was lower for that of tBTmCl, compared with the one from tBTpCl, although selectivity was quite similar. This fact could be attributed to a lower rigidity as roughly confirmed by the segmental length of the polymer chain as studied by WAXS. A model for FFV calculation was proposed and its predictions compared with those evaluated from density measurements assuming a matrix-filler interaction or ideal independence. It turns out that permeability as a function of FFV for TR-MMMs follows an interaction trend, while those not thermally treated follow the non-interaction trend until relatively high PPN loads were reached.
The modeling of immersion liquid by using quantum chemical calculation (2005)

For realizing next generation 193nm immersion lithography, developing suitable high refractive index liquid is an very important issue. To overcome the trade off relationship between high refractive index (optimally more than 1.6 ) and low absorbance (similar degree with H2O 0.0036cm-1), the molecular modeling based on quantum chemical ab-initio calculation was performed. We have successfully developed the predictive method of frequency-dependent refractive index for liquid and its absorbance. Then, we tried to estimate these properties to search for optimal candidates. In this paper, we report on the estimated results of the refractive index n and the absorbance at 193nm for some candidate compounds. We believe we could demonstrate the usefulness of the predictive method by using the quantum chemical calculation for developing new liquids, even if there were some degree of errors in the absolute values. We have found the -SO2- (like sulfone, sulfonate, sulfate) containing five- and six-membered ring compounds such as sulfolane and sultone etc. would achieve both high refractive index around 1.6 and relatively low absorbance. XeF<sub>4</sub>O and Bi(CF<sub>3</sub>)<sub>3</sub> ,unfortunately, had absorption at 193nm due to the weak binding outer valence electrons. In the case of alkyl Si and Ge, Si(CH<sub>2</sub>CH<sub>3</sub>)<sub>4</sub> might have a good balance of refractive index 1.59 and relatively low absorbance. Si(CH<sub>3</sub>)3CH<sub>2</sub>CH<sub>2</sub>OH and Ge(CH<sub>2</sub>CH<sub>3</sub>)<sub>4</sub> were estimated to have refractive index of over 1.6, but have been estimated these might have sightly stronger absorption.
Differential and Opposing Regulation of PAI-1 Promoter Activity by Estrogen Receptor α and Estrogen Receptor β in Endothelial Cells (2004)

To investigate the molecular mechanisms involved in the estrogen-dependent control of plasminogen activator inhibitor-1 (PAI-1) gene expression in vascular cells, we compared the transactivation properties of estrogen receptors (ERalpha and ERbeta) in regulating the activity of a human PAI-1 promoter reporter construct in transfected bovine aortic endothelial cells (BAECs). ERalpha increased PAI-1 promoter activity in BAECs by an estrogen-dependent mechanism, whereas ERbeta suppressed PAI-1 promoter activity by an estrogen-independent mechanism. The suppressive activity of ERbeta was dominant over the inductive activity of ERalpha. Mutation of a putative estrogen response element (ERE) located at position -427 in the proximal promoter abolished the ERalpha action without influencing the suppressive effects of ERbeta. Mutation of either AP1-like site did not eliminate the ERalpha or ERbeta actions at the PAI-1 promoter, suggesting that other promoter elements are involved in these responses. These mutations significantly reduced the -3.4kbp PAI-1 promoter response to serum. We concluded that ERalpha and ERbeta exert differential effects on the PAI-1 promoter activity in transfected BAECs. ERalpha activated the PAI-1 promoter through a proximal ERE (-427) and possibly additional EREs located within the PAI-1 promoter, whereas ERbeta suppressed the promoter construct via an unidentified mechanism. This is the first demonstration of the differential regulation of a vascular gene promoter by ERalpha and ERbeta.
O prazer do livro e da leitura: A maior flor do mundo (José Saramago), A biblioteca do avô (Maria do Rosário Pedreira) e o Canteiro dos livros (José Jorge Letria) (2012)

This article analyses three narratives written for young people which, having as its theme the book, the reading and the childhood / youth, seek to attract new readers.
Immunological Analysis of the Alternate Rubber Crop Taraxacum koksaghyz Indicates Multiple Proteins Cross-Reactive with Hevea brasiliensis Latex Allergens (2015)

The public health risk of Type I natural rubber latex allergy, caused by residual proteins in Hevea brasiliensis rubber latex (HNRL) products, has led to some medical examination and surgeon’s gloves and other health-related products being made from synthetic polymers. However, they are generally not preferred by healthcare providers due to their physical limitations. Guayule latex (GNRL), from an alternate rubber crop Parthenium argentatum, has been proven to contain none of the protein antigens present in H. brasiliensis natural rubber latex and its products. Guayule latex has also exhibited excellent film properties. Another alternate rubber crop, Taraxacum kok-saghyz, is now under commercial development, and internet reports assume that, like guayule, its latex derived rubber is free of proteins that are cross-reactive with HNRL specific IgE antibodies. Thus, the assumption is that it will not trigger allergic reactions in Type I HNR latex allergic individuals. Using ELISA and immunoblot methods, we have tested the reactivity of HNRL protein specific murine monoclonal and polyclonal antibodies, rabbit polyclonal IgG antibodies and human IgE antibodies from clinically HNRL allergic individuals against T. kok-saghyz latex and its purified rubber particles. We demonstrate that T. kok-saghyz latex contains multiple HNRL cross-reactive proteins, which importantly react with HNRL latex specific human IgE antibodies from Type I latex allergic individuals. Exposure of HNRL allergic individuals to T. kok-saghyz latex may thus place them at risk for allergic reactions.
A novel approach for a high precision multi target level measurement system based on time-domain-reflectometry (2005)

A novel approach for a high precision multi target TDR level measurement system is presented with a greatly improved performance, to fulfil the growing needs of today's industrial level measurement applications. Starting with the well known concept of the time-domain-reflectometry (TDR), a novel concept for the frequency stabilisation and the pulse generation lead to a higher performance compared to conventional industrial systems with regard to their precision, their resolution and their dynamic range. This article focuses on the description of the improved signal generation unit, comprising the generation of two RF-signals with a small frequency offset and a good phase noise performance and the generation of short electromagnetic pulses, optimized for the detection of thin interface layers. To determine the stability, the resolution and the dynamic range of the improved TDR-system, a prototype system is set up.
Integration of the Exogenous Tuning of Thraustochytrid Fermentation and Sulfur Polymerization of Single-Cell Oil for Developing Plant-like Oils (2022)

In this study, we have demonstrated a bioprocessing approach encompassing the exogenous addition of low-molecular-weight compounds to tune the fatty acid (FA) profile in a novel thraustochytrid strain to produce desirable FAs. Maximum lipid recovery (38%, dry wt. biomass) was obtained at 1% Tween 80 and 0.25 mg/L of Vitamin B12. The transesterified lipid showed palmitic acid (C16, 35.7% TFA), stearic acid (C18, 2.1% TFA), and oleic acid (C18:1, 18.7% TFA) as the main components of total FAs, which are mainly present in plant oils. Strikingly, D-limonene addition in the fermentation medium repressed the production of polyunsaturated fatty acid (PUFAs). Sulfur-polymerization-guided lipid separation revealed the presence of saturated (SFAs, 53% TFA) and monounsaturated fatty acids (MUFAs, 46.6% TFA) in thraustochytrid oil that mimics plant-oil-like FA profiles. This work is industrially valuable and advocates the use of sulfur polymerization for preparation of plant-like oils through tuneable thraustochytrid lipids.
A high-speed, high-performance, microfabricated comprehensive two-dimensional gas chromatograph (2019)

A small, consumable-free, low-power, ultra-high-speed comprehensive GC×GC system consisting of microfabricated columns, nanoelectromechanical system (NEMS) cantilever resonators for detection, and a valve-based stop-flow modulator is demonstrated. The separation of a highly polar 29-component mixture covering a boiling point range of 46 to 253 °C on a pair of microfabricated columns using a Staiger valve manifold in less than 7 seconds, and just over 4 seconds after the ensemble holdup time is demonstrated with a downstream FID. The analysis time of the second dimension was 160 ms, and peak widths in the second dimension range from 10-60 ms. A peak capacity of just over 300 was calculated for a separation of just over 6 s. Data from a continuous operation testing over 40 days and 20 000 runs of the GC×GC columns with the NEMS resonators using a 4-component test set is presented. The GC×GC-NEMS resonator system generated second-dimension peak widths as narrow as 8 ms with no discernable peak distortion due to under-sampling from the detector.
Hypoglycaemic effect of aqueous stem extract of Anisopus mannii in normal rats (2009)

The hypoglycaemic effect and acute oral toxicity of graded doses of aqueous extract of Anisopus mannii was investigated in rats. The revised limit dose test of Up and Down procedure was used to determine the acute oral toxicity of the plant. The result revealed that the Median lethal dose of the plant is greater than 3000 mg/kg body weight. The treatment of the rats with varying doses of the plant extract for 28 days in this studies resulted in increases in body weight although not statistically significant (P > 0.05). The repeated administration of graded doses of the extract also produces significant (P < 0.05) decreases in the blood sugar levels of the treatment groups compared to their respective day zero values thus justifying its folkloric use as a potential hypoglycaemic agent.

	 

	Key words: Anisopus mannii, hypoglycemic effect, Rats.