gebhart/patrepeval huggingface dataset:
Ultra-thin film composite mixed matrix membranes incorporating iron(<scp>iii</scp>)–dopamine nanoparticles for CO<sub>2</sub>separation (2016)

Iron dopamine nanoparticles (FeDA NPs) are incorporated into a nanoscale thick polyethylene glycol (PEG) matrix for the first time, to form ultra-thin film composite mixed matrix membranes (UTFC-MMMs) via a recently developed continuous assembly of polymers (CAP) nanotechnology. The FeDA NPs are prepared by in situ nano-complexation between Fe(3+) and DA and have a particle size that can be varied from 3 to 74 nanometers by adjusting the molar ratio of DA to Fe(3+) ion. The cross-linked selective layer with sub 100 nanometer thickness is prepared by atom transfer radical polymerisation of a mixture of PEG macrocross-linkers and FeDA NPs on top of a highly permeable poly(dimethyl siloxane) (PDMS) prelayer, which is spin-coated onto a porous polyacrylonitrile (PAN) substrate. The incorporation of the FeDA NPs within the PEG-based selective layer is confirmed by XPS analysis. The UTFC-MMMs (thickness: ∼45 nm) formed present excellent gas separation performance with a CO2 permeance of ∼1200 GPU (1 GPU = 10(-6) cm(3) (STP) cm(-2) s(-1) cmHg(-1)) and an enhanced CO2/N2 selectivity of over 35, which is the best performance for UTFC membranes in the reported literature.
Calibration of VUV polarization analyzers (1987)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text M. A. Khakoo, P. Hammond, and J. W. McConkey, "Calibration of VUV polarization analyzers," Appl. Opt. 26, 3492-3494 (1987) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Statistical mechanics of kinetic proofreading in protein folding in vivo. (1994)

The statistical energy landscape picture of protein folding has led to the understanding that the energy landscape must have guiding forces leading to a protein folding funnel in order to avoid the Levinthal paradox in vitro. Since folding in vivo often requires the action of chaperone molecules and ATP hydrolysis, we must ask whether folding in a system maintained away from equilibrium can avoid the Levinthal paradox in other ways. We describe a model of the action of chaperone molecules in protein folding in vivo on the basis of a repetitive cycle of binding and unbinding, allowing the possibility of kinetic proofreading. We also study models in which chaperone binding is locally biased, depending on the similarity of the conformation to the native one. We show that while kinetic proofreading can modestly facilitate folding, it is insufficient by itself to overcome the Levinthal paradox. On the other hand, such kinetic proofreading with biasing can provide the nonequilibrium analog of a folding funnel and greatly enhance folding yields and speed up folding.
Crisis and aftermath (1989)

Last November the Internet was infected with a worm program that eventually spread to thousands of machines, disrupting normal activities and Internet connectivity for many days. The following article examines just how this worm operated.
Single-molecule magnet behaviour in a tetranuclear Dy<sup>III</sup> complex formed from a novel tetrazine-centered hydrazone Schiff base ligand (2017)

Two analogous tetranuclear lanthanide complexes have been synthesized with the general formula [Ln<sub>4</sub>(vht)<sub>4</sub>(MeOH)<sub>8</sub>](NO<sub>3</sub>)<sub>4</sub>·aMeOH·bH<sub>2</sub>O, where H<sub>2</sub>vht = (3,6-bis(vanillidenehydrazinyl)-1,2,4,5-tetrazine) and Ln = Dy<sup>III</sup> (1), Gd<sup>III</sup> (2). These complexes are characterized by several techniques; including single-crystal X-ray diffraction, SQUID magnetometry and single-crystal micro-SQUID hysteresis loop measurements. Elucidation of the crystal structure of the complexes shows that the lanthanide ions are bridged by a tetrazine ring, a rare bridging moiety for lanthanide ions. Magnetic studies reveal that both 1 and 2 exhibit weak ferromagnetic exchange interactions between Ln ions, and 1 displaying Single-Molecule Magnet (SMM) behaviour with a magnetisation reversal barrier of U<sub>eff</sub> = 158 K (τ<sub>0</sub> = 1.06 × 10<sup>-7</sup> s).
Inexpensive computer-controlled experimentation (1979)

The choice of a computer suitable for general-purpose laboratory automation is discussed, with particular reference to those facilities which provide convenient and straightforward operation. A detailed design is presented for a versatile yet economical interfacing system for use with one particular computer. Its compatibility with other systems is briefly discussed, and an indication given of how the system may be modified to suit other processors.
Dual mode of cortisol action on GH/IGF-I/IGF binding proteins in the tilapia, Oreochromis mossambicus (2003)

Glucocorticoids are known to impede somatic growth in a wide range of vertebrates. In order to clarify the mechanisms through which they may act in an advanced teleost fish, we examined the effects of cortisol administration on the growth hormone (GH)/insulin-like growth factor-I (IGF-I)/IGF-binding protein (IGFBP) system in the tilapia (Oreochromis mossambicus). In a short-term experiment, fish were injected intraperitoneally with cortisol (2 or 10 microg/g), and killed at 2, 4, 8 and 24 h after the injection. In a longer-term experiment, fish were killed 24 and 48 h after cortisol injection (2, 10 and 50 microg/g). Cortisol at doses of 2 and 10 microg/g significantly increased IGFBPs of four different sizes (24, 28, 30, and 32 kDa) in the plasma within 2 h without altering plasma levels of IGF-I or GH. On the other hand, cortisol at doses of 10 and 50 microg/g significantly reduced plasma IGF-I levels after 24 and 48 h. IGF-I mRNA levels in the liver were also significantly reduced by cortisol at doses of 10 and 50 microg/g after 48 h, suggesting that a decrease in plasma IGF-I levels is mediated through the attenuation of IGF-I gene expression in the liver. In contrast, no significant change was observed in plasma or pituitary contents of GH at any time point examined, which would appear to indicate that cortisol reduces IGF sensitivity to GH (GH-resistance). These results clearly indicate that cortisol induces a rapid increase in plasma IGFBPs and a more delayed decrease in IGF-I production. The dual mode of cortisol action may contribute to the inhibitory influence of cortisol on somatic growth in teleosts.
Replacement of Artemia nauplii with different alternative diets for larval stage development and survival of giant fresh water prawn, Macrobrachium rosenbergii (de man) (2013)

The present study was conducted on Macrobrachium rosenbergii (de Man) larvae to estimate the effectiveness of different diets to replace Artemia nauplii in the feeding system. The study included two experiments performed at pilot scale in 12 – l tanks using a recirculating system. Larval stocking density was 100 l – 1 . After 10 days of feeding by Artemia nauplii, different diets included wet and dry diets (Egg custard, Artemia flakes and Higashi Maru No-3 feed) and de-capsulated Artemia cysts, were tested to replace Artemia nauplii. In a control treatment using only de-capsulated Artemia cysts throughout the complete larval rearing was also included. The results showed that feeding larvae exclusively de-capsulated cysts for the complete rearing cycle was not suitable. When gradually replacing up to 50% of the Artemia nauplii ratio with wet or dry diets, good results in terms of growth, survival and quality of the larvae were obtained, similar to the control treatment receiving only Artemia nauplii. However, immediately replacing 50% of the Artemia nauplii ratio with artificial diets negatively affected larval development. Addition of artificial feed could start from larval stage VI, with about 25% of the Artemia nauplii replaced with artificial diet. Subsequently, the addition ratio could be increased up to 50% from stage VIII to postlarvae stage. Artificial diets should be provided in different particle size ranges based on the acceptance of larvae, larval stage, gradually increasing from 250 to 1000 μm from stage VI to postlarvae stage. The results obtained in the present work may also helpful for the replacement for different diets for economical aspects of the hatchery operations .
Central Nervous System: Recovery of Function (1969)

Rats with one- or two-stage lesions in the hippocampus, anzygdala, or frontal cortex were tested on a variety of tasks. Even though locus and amount of tissue damage were very similar in the two groups, animals with one-stage lesions were impaired as judged by performance on all problems, while aninmals with two-stage lesionis were not.
Functional impact of high protein intake on healthy elderly people (2008)

Decline in muscle mass, protein synthesis, and mitochondrial function occurs with age, and amino acids are reported to enhance both muscle protein synthesis and mitochondrial function. It is unclear whether increasing dietary protein intake corrects postabsorptive muscle changes in aging. We determined whether a 10-day diet of high [HP; 3.0 g protein x kg fat-free mass (FFM)(-1) x day(-1)] vs. usual protein intake (UP; 1.5 g protein x kg FFM(-1) x day(-1)) favorably affects mitochondrial function, protein metabolism, and nitrogen balance or adversely affects insulin sensitivity and glomerular filtration rate (GFR) in 10 healthy younger (24+/-1 yr) and 9 older (70+/-2 yr) participants in a randomized crossover study. Net daily nitrogen balance increased equally in young and older participants, but postabsorptive catabolic state also increased, as indicated by higher whole body protein turnover and leucine oxidation with no change in protein synthesis. Maximal muscle mitochondrial ATP production rate was lower in older people, with no change occurring in diet. GFR was lower in older people, and response to HP was significantly different between the two groups, with a significant increase occurring only in younger people, thus widening the differences in GFR between the young and older participants. In conclusion, a short-term high-protein diet increased net daily nitrogen balance but increased the postabsorptive use of protein as a fuel. HP did not enhance protein synthesis or muscle mitochondrial function in either young or older participants. Additionally, widening differences in GFR between young and older patients is a potential cause of concern in using HP diet in older people.
Motor function in the elderly (2013)

Participants with more education were less susceptible to WMLs' effect on motor function. Higher education was associated with better motor performances but not with motor decline. These results are consistent with the passive reserve hypothesis.
Allmänhetens förtroende för polisens internutredning (2006)

Denna rapport undersöker vad som gjorts för att höja allmänhetens förtroende för polisens interutredningar. Vi anser att bristen av objektivitet i den mediala bevakningen av polisen påverkar allmänhetens förtroende för polisens internutredningar. För att få en bredare bild av utvecklingen inom internutredningarna har vi studerat tidigare utredningar. Vad vi mer tittade på vid studierna av dessa utredningar var om de påbörjats pga. intern kritik eller om det var för allmänhetens förtroende för utredningar mot poliser. Problemet är svårigheten att kunna förmedla resultaten av utredningarna till allmänheten. Som vanlig medborgare är man inte insatt i hur en förundersökning går tillväga och därför ej heller medveten om den yttre granskningen som sker av åklagareväsendet mot polisen. Rapporten presenterar även hur förfaringssättet vi internutredningar inom polisen sköts idag. För att kunna göra det har vi intervjuat chefen för internutredningar vid polismyndigheten i Västerbottens län. Vi har även lyssnat på information från biträdande chefsåklagaren på riksenheten för polismål. Vår slutsats visar att vid händelser när polisen gjort ingripanden som uppmärksammats medialt har allmänhetens förtroende för polisen sjunkit även om det inte begåtts något fel. Det kommer alltid finnas kritik mot myndigheter på ett eller annat sätt. Vad som kan vara bra med upprepad kritik är att man fortsätter att vara noggrann i utredningar mot poliser.
A neurodegenerative disease mutation that accelerates the clearance of apoptotic cells (2011)

Frontotemporal lobar degeneration is a progressive neurodegenerative syndrome that is the second most common cause of early-onset dementia. Mutations in the progranulin gene are a major cause of familial frontotemporal lobar degeneration [Baker M, et al. (2006) Nature 442:916-919 and Cruts M, et al. (2006) Nature 442:920-924]. Although progranulin is involved in wound healing, inflammation, and tumor growth, its role in the nervous system and the mechanism by which insufficient levels result in neurodegeneration are poorly understood [Eriksen and Mackenzie (2008) J Neurochem 104:287-297]. We have characterized the normal function of progranulin in the nematode Caenorhabditis elegans. We found that mutants lacking pgrn-1 appear grossly normal, but exhibit fewer apoptotic cell corpses during development. This reduction in corpse number is not caused by reduced apoptosis, but instead by more rapid clearance of dying cells. Likewise, we found that macrophages cultured from progranulin KO mice displayed enhanced rates of apoptotic-cell phagocytosis. Although most neurodegenerative diseases are thought to be caused by the toxic effects of aggregated proteins, our findings suggest that susceptibility to neurodegeneration may be increased by a change in the kinetics of programmed cell death. We propose that cells that might otherwise recover from damage or injury are destroyed in progranulin mutants, which in turn facilitates disease progression.
The First Year of the HEM-B RICH (2000)

Y~ , 'P -~upL2~~~~, l-LL ?m The operational expcrience of the RICH detector Tor the first year at HERA-B is descrihcd. The design criteria, detcc- tor coinponcnts, and reconstruction software are reviewed. The results show that the main dcsign goals have been achieved. is a fine-grained forward spec- most of the timc according to the standard b trOmcter constructed around the beam-pipe to meaSl,re the fi- resulting in a kaon. Thc charge of the kaon in the decay of (he nal states of interest. Thc geometric acceptance of the detector covers about 90% of the solid angle in the CMS frame. A schcmatic of the detector is shown in Figure 1. The protons, entering from the right, interact with 8 wire targets positioned inside the heam-pipe. The particles produced in an interaction are first tracked by 8 layers of silicon strip detector, deployed within 1 cm of the beam during data-taking, with high spatial A D~~~~~ criteria
Overexpression of <i><scp>GA</scp>20‐<scp>OXIDASE</scp>1</i> impacts plant height, biomass allocation and saccharification efficiency in maize (2015)

Increased biomass yield and quality are of great importance for the improvement of feedstock for the biorefinery. For the production of bioethanol, both stem biomass yield and the conversion efficiency of the polysaccharides in the cell wall to fermentable sugars are of relevance. Increasing the endogenous levels of gibberellic acid (GA) by ectopic expression of GA20-OXIDASE1 (GA20-OX1), the rate-limiting step in GA biosynthesis, is known to affect cell division and cell expansion, resulting in larger plants and organs in several plant species. In this study, we examined biomass yield and quality traits of maize plants overexpressing GA20-OX1 (GA20-OX1). GA20-OX1 plants accumulated more vegetative biomass than control plants in greenhouse experiments, but not consistently over two years of field trials. The stems of these plants were longer but also more slender. Investigation of GA20-OX1 biomass quality using biochemical analyses showed the presence of more cellulose, lignin and cell wall residue. Cell wall analysis as well as expression analysis of lignin biosynthetic genes in developing stems revealed that cellulose and lignin were deposited earlier in development. Pretreatment of GA20-OX1 biomass with NaOH resulted in a higher saccharification efficiency per unit of dry weight, in agreement with the higher cellulose content. On the other hand, the cellulose-to-glucose conversion was slower upon HCl or hot-water pretreatment, presumably due to the higher lignin content. This study showed that biomass yield and quality traits can be interconnected, which is important for the development of future breeding strategies to improve lignocellulosic feedstock for bioethanol production.
In Situ Chemical Reduction of Aquifer Sediments:  Enhancement of Reactive Iron Phases and TCE Dechlorination (2004)

In situ chemical reduction of aquifer sediments is currently being used for chromate and TCE remediation by forming a permeable reactive barrier. The chemical and physical processes that occur during abiotic reduction of natural sediments during flow by sodium dithionite were investigated. In different aquifer sediments, 10-22% of amorphous and crystalline FeIII-oxides were dissolved/reduced, which produced primarily adsorbed FeII, and some siderite. Sediment oxidation showed predominantly one FeII phase, with a second phase being oxidized more slowly. The sediment reduction rate (3.3 h batch half-life) was chemically controlled (58 kJ mol(-1)), with some additional diffusion control during reduction in sediment columns (8.0 h half-life). It was necessary to maintain neutral to high pH to maintain reduction efficiency and prevent iron mobilization, as reduction generated H+. Sequential extractions on reduced sediment showed that adsorbed ferrous iron controlled TCE reactivity. The mass and rate of field-scale reduction of aquifer sediments were generally predicted with laboratory data using a single reduction reaction.
ChemInform Abstract: SELENOSTANNATES FROM AQUEOUS SOLUTIONS: PREPARATION AND STRUCTURE OF SODIUM SELENOSTANNATE HEXADECAHYDRATE (NA4SNSE4.16 H2O) (1980)

Abstract Die aus stöchiometrischen Ansätzen unter Sauerstoffausschluß gemäß Gleichung A synthetisierte Titelverbindung wird durch eine vollständige Röntgen‐Strukturanalyse charakterisiert.
Multiple piloleiomyomas associated with solitary angioleiomyoma. (1999)

A 58 year-old male had reddish scattered papules strictly confined to the right side of his upper back and neck, right shoulder, and right upper arm. Additionally, he also noticed a subcutaneous nodule on his left thigh. Histopathological examinations revealed that the papules on the back, nape of the neck, shoulder, and arm were multiple piloleiomyomas, as shown by the proliferation of bundles of smooth muscles in the dermis. The subcutaneous nodule of the thigh was angioleiomyoma with a well-circumscribed lesion composed of smooth muscles and blood vessels. Ipsilaterality and segmentality of the distribution of the papules of piloleiomyomas and probable family history that his mother had similar papules with a similar distribution suggest the nevoid character of our case. Piloleiomyomas are often reported to be associated with leiomyoma of the uterus or other organs. This is the first reported case of multiple piloleiomyomas with solitary angioleiomyoma in the literature.
Hemodynamic Consequences of Arrhythmias (1991)

Hemodynamic effects during arrhythmias may be caused by underlying pathology (i.e., infarction) as well as disturbance of rate or conduction pattern. In all arrhythmias, compensatory mechanisms tend to restore normal hemodynamics, and with good left ventricular function this can be achieved despite wide disturbance of rhythm. Hemodynamic effects of ectopic beats can result in dramatic fall of stroke volume and reduction in cardiac output, which is greater for ventricular than for atrial ectopics. Prolonged tachycardias are also tolerated up to far higher rates (180/min) if they are atrial, not ventricular, in origin. Mean blood pressure is often maintained even when systolic pressure and cardiac output are reduced. Even in healthy young subjects it is possible for cardiac ischemia to be induced by excessive heart rates. Some of the most deleterious effects are produced by simultaneous atrial and ventricular contraction, which results in continued suppression of cardiac output, both during tachycardias and at normal heart rates. Such situations are often highly symptomatic. Few measurements are available during external chest compression, and these suggest only marginal improvement in hemodynamics, with low pressures and output.
Serum and growth factors regulate expression of a 43 kDa protein in smooth muscle cell cultures (1988)

Smooth muscle cells respond to injury and the presence of serum factors by modulating from a quiescent contractile cell to a motile synthetic phenotype. To evaluate the biochemical response to serum exposure, we examined the proteins synthesized and secreted in response to serum. The most prominent effect of serum was the rapid production of a protein with an apparent molecular weight of 43 kDa. Removal of serum from the culture environment led to a cessation of 43 kDa protein production. The effect of exogenous heparin on 43 kDa protein production was also evaluated. Neither the 43 kDa protein nor a previously described 38 kDa protein was induced by heparin. Further, heparin treatment did not counteract the effects of serum. These studies demonstrate that an early response of vascular smooth muscle cells to serum is the production of this previously undescribed protein and that other modifications of the culture conditions did not affect its synthesis.
ChemInform Abstract: Selective Cleavage of Carboxylic Esters in the Presence of Monosubstituted Malonates. (1997)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A fast method for tracking multiple nonstationary tones (2002)

A row action projection technique with adaptive frequency space partitioning is used. A sample-by-sample update strategy provides a dynamic block size and allows for superresolution in the frequency domain with little loss of time localization. Numerical results demonstrate the superresolving capability and fast tracking rate, as well as the stability in the presence of additive noise. This technique provides a real-time method of tracking the instantaneous frequency of a signal. The tracking capability of a frequency modulated (FM) signal is compared to that given by the analytic signal and the Wigner distribution methods. The method is proposed for tracking multiple narrowband signals and has applications in tracking of frequency-hopping signals, dynamic subband analysis, demodulation of digital FM, and multiple target tracking.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Utilisation de modèles mécaniques et géométriques pour la synthèse et le contrôle d'images animées (1986)

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