gebhart/patrepeval huggingface dataset:
Effect of new photoinitiator on the courses of photochemical reactions in poly (vinyl chloride) (2009)

A two-stage synthesis of new photoinitiator of polymer degradation, namely S-(4-benzoylphenyl)-4-methoxythiobenzoate, is presented [equation (1) and (2)]. The initiator was used for physical modification of poly(vinyl chloride) (PVC). The courses of photochemical processes going in thin films made of PVC itself or with addition of 2% of initiator were investigated by absorption spectroscopy (UV-Vis and FTIR, Fig. 1-7). It has been found that the initiator accelerated the processes of dehydrochlorination and oxidation of PVC under the influence of UV radiation of wavelength ?=254nm. The mechanism of photochemical reactions initiated in PVC by the initiator discussed was proposed.
Abstract 4132: Do N-3 Polysunsaturated Fatty Acids Reduce Risk of Sudden Cardiac Death and Ventricular Arrhythmias? A Meta-analysis of Randomized Trials (2006)

Introduction: N-3 polyunsaturated fatty acids (PUFA) have been demonstrated to have antiarrhythmic properties. However, randomized studies have shown inconsistent results. Objective: We performed a...
NOTTINGHAM PAVEMENT TEST FACILITY (1981)

The Nottingham pavement test facility was developed for the experimental study of pavement structures under wheel loading. A description is given of its mode of operation and capabilities. It is located in a laboratory and allows pavement sections 4.8x2.4 m to be subjected to moving wheel loads up to 15 kN at contact pressures comparable with actual commercial traffic and at speeds up to 16 km/h. Electronic controls allow a lateral distribution of wheel passes while loading may be either unidirectional or bidirectional. Controlled temperature and moisture conditions can be achieved. Each pavement under test is instrumented to measure transient stress and strain. Permanent strains and surface deformations are measured at intervals during loading. Typical tests continue until 100,000 wheel passes have been applied. The main objective of the research for which the facility has been developed is the provision of data for comparison with theoretical predictions of pavement responses to load as part of an effort to produce analytically based methods of pavement design. (Author)
Band Gap Tunable N-Type Molecules for Organic Field Effect Transistors (2013)

A series of four novel n-type molecules has been synthesized. Unlike previous approaches, the end group of these molecules was fixed and the molecular core was varied. The resulting materials were thoroughly analyzed. Electronic properties were derived from photoemission spectroscopy, optical properties were derived with the help of optical spectroscopy, and the structure of thin films on Au(111) was derived by scanning tunneling microscopy (STM). In addition, prototypical organic field-effect transistors (OFETs) (forming n-channels in OFETs) have been fabricated and tested. The correlation between the device performance of the respective OFETs (i.e., electron mobility) and their electronic as well as structural properties was investigated. It turned out that a combination of beneficial electronic and structural properties provides the best results. These findings are important for the design of new materials for future device applications.
Reaction of bulky monosubstituted phosphorus(III) halides with disodium tetracarbonylferrate. Steric and electronic factors in the synthesis of Fe(CO)4 complexes of diphosphene and phosphinidene ligands (1987)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of bulky monosubstituted phosphorus(III) halides with disodium tetracarbonylferrate. Steric and electronic factors in the synthesis of Fe(CO)4 complexes of diphosphene and phosphinidene ligandsRuth A. Barlett, H. V. Rasika Dias, Kathy M. Flynn, Marilyn M. Olmstead, and Philip P. PowerCite this: J. Am. Chem. Soc. 1987, 109, 19, 5699–5703Publication Date (Print):September 1, 1987Publication History Published online1 May 2002Published inissue 1 September 1987https://pubs.acs.org/doi/10.1021/ja00253a022https://doi.org/10.1021/ja00253a022research-articleACS PublicationsRequest reuse permissionsArticle Views277Altmetric-Citations34LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
The Pig as a Source of Cardiac Xenografts (2001)

The inadequate availability of human donor hearts and other organs has inspired interest in the field of xenotransplantation. Historically, ten attempts to transplant animal hearts into human recipients have been reported. Those who received hearts from nonhuman primates (i.e., baboons and chimpanzees) survived rather longer than did those who received hearts from nonprimates (i.e., sheep and pigs). Nevertheless, current opinion is that the pig is the best candidate as a source of hearts for humans despite the considerable immunologic disparity between the two species. Pigs are available in large numbers and can be bred easily and rapidly. They grow to appropriate sizes and their cardiovascular system is similar to that of humans. Substantial knowledge has been accumulated regarding both genetic engineering and tolerance induction in pigs, two strategies that may help to overcome the existing immunologic barriers. Concern has been raised, however, with regard to the potential for the transfer of a porcine infection with the pig organ to the human recipient. This brief review addresses these and other aspects of the use of the pig as a source of hearts for patients with end-stage cardiac disease.
Laboratory Studies of the Chemotherapeutic Activity and Toxicity of Some Nitroheterocycles (1970)

The chemotherapeutic activity and the toxicity of some nitroheterocycles used in antiparasitic therapy (aminitrozole, 2-α-thenoylamino-5-nitrothiazole, niridazole, furazolidone, nifuratel and metronidazole) were compared in laboratory tests. Metronidazole appeared as the most active compound against trichomoniasis and amoebiasis and had in addition the widest safety margin; it also had the highest therapeutic index against lambliasis. Niridazole while showing activity against these protozoa had a less favourable therapeutic index but was the only one which was very active against bilharziasis. Furazolidone appeared as a specially good antibacterial agent with a good activity against Iambliasis. Aminitrozole showed a wide spectrum of activity; its safety margin was slightly lower, however. The other two (2-α-thenoylamino-5-nitrothiazole and nifuratel) were less active and showed a narrower spectrum of activity.
Acoustic Filter for Water Filled Pipes (1949)

It is anticipated that some of the auxiliary equipment to be used in conjunction with the new water tunnel under construction at the Pennsylvania State College will be particularly noisy in the ultrasonic frequency region where certain low level acoustic measurements are to be made. This potentially noisy equipment includes such items as a deaerator, an energy dissipator, and a pressure control system which are located in a water loop, external to the main tunnel section. To effectively isolate this loop acoustically from the remainder of the tunnel where the acoustic measurements will be made, it has been considered desirable to design an acoustic filter which can be inserted at the junctions of the loop with the tunnel. This filter should serve the multiple function of reducing the sound transmission through the pipe walls and through the water in the pipes while permitting the passage of relatively large volumes of water at small loss of pressure. The problem of isolation in the pipe path is a fairly common one and essentially requires the use of sound attenuating gasket material. However, the isolation of the water path is more complex in that water must be allowed to flow while sound is attenuated. In this case a honey-combed structure of a pressure release material is used. This paper discusses the hydraulic consideration of the problem and presents the results of acoustic transmission measurements on the filter components. The measurements include: 1. The frequency characteristics of the acoustic filter under free field conditions, 2. The transmission properties of the isolating gaskets mounted in the pipe flanges, and 3. The effective response of the filter and isolation gaskets combined.
Strain Induced Half-Metal to Semiconductor Transition in GdN (2005)

We investigate the electronic structure and magnetic properties of GdN as a function of unit cell volume. Based on the first-principles calculations of GdN, we observe that there is a transformation in the conduction properties associated with the volume increase: first from half-metallic to semimetallic, then ultimately to semiconducting. We show that applying stress can alter the carrier concentration as well as mobility of the holes and electrons in the majority spin channel. In addition, we found that the exchange parameters depend strongly on lattice constant, thus the Curie temperature of this system can be enhanced by applying stress or doping impurities.
Synthesis and high-performance liquid chromatography of 3,4-guaiacol estrogen 17-sulfates. (1986)

For studies on the enzymatic O-methylation of 3, 4-dihydroxyestra-1, 3, 5(10)-trien-17β-ol 17-sulfate (Ie), its two monomethyl ethers, 4-hydroxy-3-methoxyestra-1, 3, 5(10)-trien-17β-ol 17-sulfate (IId) and 3-hydroxy-4-methoxyestra-1, 3, 5(10)-trien-17β-ol 17-sulfate (IIId), were prepared as authentic specimens.An assay procedure for these guaiasols including the isomeric sulfates, 3-hydroxy-2-methoxyestra-1, 3, 5(10)-trien-17β-ol 17-sulfate (Ic) and 2-hydroxy-3-methoxyestra-1, 3, 5(10)-trien-17β-ol 17-sulfate (Id), was established by using reversed-phase high-performance liquid chromatography. The devised technique involves elution with a mixture of 0.5% NH4H2PO4 (pH 3.0) and methanol (55 : 45, v/v) on a TSK gel ODS-120A column and monitoring with an electrochemical detector.
Binding of chromium to chromatin and DNA from liver and kidney of rats treated with sodium dichromate and chromium(III) chloride in vivo. (1985)

The in vivo binding of chromium to whole chromatin, polynucleosomes, DNA, and cytoplasmic RNA-protein fraction from liver and kidney was examined after treatment of rats with sodium dichromate and chromium(III) chloride. Significant amounts of chromium were bound to DNA and the nonhistone proteins of chromatin and to cytoplasmic RNA-protein fraction. The binding of chromium to the nuclear and cytoplasmic nucleic acid fractions varied considerably, depending on the tissue and the oxidation state of the chromium administered. The level of chromium bound to whole chromatin was greater in the liver than in the kidney after treatment with either chromium compound. Chromium entered the liver and kidney tissues at a slower rate after chromium(III) treatment than after chromium(VI) treatment. At early times after chromium(VI) treatment, more chromium was bound to the liver and kidney chromatin and DNA than after chromium(III) treatment. A much smaller proportion of the chromium bound to chromatin was associated with the DNA after treatment with chromium(III) than after treatment with chromium(VI). However, 40 hr after injection, there was no significant difference in the level of chromium on the DNA from both the liver and kidney of chromium(VI)- and chromium(III)-treated animals. No DNA damage was detected in either liver or kidney nuclei after chromium(III) treatment, using the technique of alkaline elution. A possible correlation between chromium binding to chromatin and DNA damage is discussed.
Analysis and Design of an Integrated Magnetics Planar Transformer for High Power Density LLC Resonant Converter (2021)

Recent studies on compact and lightweight electronic devices have demonstrated that the LLC resonant converter (LRC) can facilitate achieving high efficiency and high power density. Moreover, employing a planar transformer can further improve the overall system power density. Although the planar transformer can assist in reducing the size of the converter, its high magnetic coupling makes the leakage inductance too small for a resonant inductor in the LRC. Therefore, an extra inductor must be employed separately, leading a considerable decrease in the power density. From this reason, significant research on integrated magnetics has been conducted to combine a transformer and external inductor into a single core. However, they require additional wires or magnetic sheets, and their structures are complex and costly. To overcome these limitations, the integrated magnetics planar transformer (IMPT) for a high power density LRC is proposed in this paper. In the proposed approach, since the primary wire is split into each side leg of the EE-type magnetic core and each operates as a transformer and a resonant inductor alternatively, an external inductor or additional wires are unnecessary. In addition, since the magnetic flux density of the IMPT is approximately equivalent to that of conventional transformer, the core size and the number of turns are almost the same. Therefore, the proposed IMPT features higher efficiency and power density without additional size and costs. To confirm the validity of the proposed IMPT, the operational principles, theoretical analysis, design considerations, and experimental results from a 350 W prototype are presented.
Theoretical Analysis of Media Used in the Growth of Yeasts on Methanol (1981)

A theoretical analysis has been made of five different media which have been used for growth of the methylotrophic yeasts Hansenula polymorpha and Candida boidinii. The media compositions were found to differ significantly in their content of trace elements. Chemostat studies revealed that low growth yields, particularly at high dilution rates, were probably due to unexpected limitations in trace elements.
Parental control based on speaker class verification (2008)

Restricting children access to materials unsuitable for them such as violence scenes is very important for parents. So there is a feature named Parental Control in devices such as televisions and computers to define the contents children can access. The parental control setting must be protected from children and is usually done by a password. In this paper, we propose a new method for distinguishing between adult users and child users based on human speech. In our proposed method, the user must say a word and the adult users are identified by processing the speech. Our current implementation has 92.5% accuracy for distinguishing adult users from children.
De novo design of self-assembling helical protein filaments (2018)

We describe a general computational approach to designing self-assembling helical filaments from monomeric proteins and use this approach to design proteins that assemble into micrometer-scale filaments with a wide range of geometries in vivo and in vitro. Cryo-electron microscopy structures of six designs are close to the computational design models. The filament building blocks are idealized repeat proteins, and thus the diameter of the filaments can be systematically tuned by varying the number of repeat units. The assembly and disassembly of the filaments can be controlled by engineered anchor and capping units built from monomers lacking one of the interaction surfaces. The ability to generate dynamic, highly ordered structures that span micrometers from protein monomers opens up possibilities for the fabrication of new multiscale metamaterials.
Confocal laser endomicroscopy for prediction of disease relapse in ulcerative colitis: A pilot study (2013)

In vivo intramucosal changes detected by confocal endomicroscopy in ulcerative colitis remittent patients can predict disease relapse. This observation may have further implications for disease management and medical treatment.
Acetylcholine synthesis and release following continuous intracerebral administration of NGF in adult and aged Fischer-344 rats (1993)

NGF promotes the survival and enhances the neurotransmitter phenotype of basal forebrain and striatal cholinergic neurons in brain of rat. The objective of the present study was to determine whether stimulations of the cholinergic neuronal markers ChAT and high-affinity choline uptake are reflected in enhanced synthesis and release of ACh. Enhancement of ACh release in brain of adult and aged rats could result in increased cholinergic neurotransmission, and altered animal behavior. NGF (1.2 micrograms/d) was administered intracerebroventricularly for 2 weeks by osmotic minipump to male Fischer-344 rats aged 4 and 24 months. Cholinergic neuronal functional parameters were measured in frontal cortex, hippocampus, and striatum. In young adult rats, increased ChAT and choline uptake activities were accompanied by enhanced ACh synthesis, basal and depolarization-induced release of both endogenous and newly synthesized transmitter, with the largest effect generally being observed in striatum. In aged animals, the responses to NGF were less uniform. Whereas the pattern for changes in ChAT activity was similar to that seen in younger animals, choline uptake activity was increased only in frontal cortex and striatum. Coincidentally, ACh synthesis was also increased only in these two brain regions. ACh content of synaptosomes was not affected by age or NGF treatment, and the ACh levels in microwaved samples of striatum and basal forebrain were not affected by NGF treatment. However, profound deficits in both basal and evoked release of newly synthesized ACh were observed in the aged rats. NGF treatment had no significant effect on the basal release of newly synthesized ACh in aged rats.(ABSTRACT TRUNCATED AT 250 WORDS)
Bandwidth Allocation in WiMAX Networks Using Learning Automaton (2011)

Abstract: Recent developments on the wireless communication technology have brought much innovativeness to make wireless access networks, e.g. WiMAX systems, to be able to compete with the wired access networks with much more bandwidth. QoS service provisioning is an important issue for deploying such networks. The IEEE 802.16d standard has specified the services should be provided at the medium access control (MAC) layer in WiMAX networks. However, it has left a wide space for research to develop and implement those specified services. In this paper, the issue of differentiated service provisioning will be addressed with the non-real-time polling service in WiMAX systems. The proposed solution has been designed to have an ability to accommodate integrated traffic in the networks with effective scheduling schemes. A series of simulation experiments have been carried out to evaluate the performance of the proposed scheduling algorithm. In our algorithm we introduce a two-phase Learning Automaton queuing (2PLAQ) algorithm tailored for uplink scheduling in the WiMAX network. It aims to strike the balance between delay requirement and fair bandwidth allocation. The results reveal that the proposed solution performs effectively to the integrated traffic composed of messages with or without time constraints and achieves proportional fairness among different types of traffic. Key words: WiMAX % Scheduling % Learning Automaton % Bandwidth Allocation INTRODUCTION fixed point-to-point (PTP) or point-to-multipoint (PMP)
PLL charge pump with adaptive body-bias compensation for minimum current variation (2012)

A novel charge pump with adaptive body-bias compensation to minimise the current variation over a wide output voltage range is proposed. With 1.2 V supply voltage, the proposed charge pump demonstrates a constant current of 140 µA across the output voltage from 0.2 to 1.0 V. The current variation is less than 1.20 µA or 0.9% over output range, which helps keep the loop bandwidth of the charge pump phase-locked loop (PLL) fixed and maximise the dynamic range. Extremely low power adaptive bias circuits are proposed to provide body-bias compensation at different output voltage levels. It is believed that the current variation is the minimum among the published results of PLL charge pumps.
[(CyPF-<sup><i>t</i></sup>Bu)PdCl<sub>2</sub>]: An Air-Stable, One-Component, Highly Efficient Catalyst for Amination of Heteroaryl and Aryl Halides (2008)

An air- and moisture-stable palladium catalyst, [(CyPF-(t)Bu)PdCl2] (1), for coupling of heteroaryl chlorides, bromides, and iodides with a variety of primary amines is described. Most of these reactions occurred in high yield with 0.001-0.05 mol % catalyst loading. The reactions tolerated a wide range of functional groups.
Living wills to end life (1991)

Peter Ellis examines the moral dilemmas created when people make an advance declaration of their preference for death over extreme illness
Randomized Greedy Inference for Joint Segmentation, POS Tagging and Dependency Parsing (2015)

Yuan Zhang, Chengtao Li, Regina Barzilay, Kareem Darwish. Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies. 2015.
High density plasma source for plasma lens experiments (2002)

Experimental results of the study of a candidate source for high-energy particle beam underdense plasma lens experiments are presented. The high density plasma is based an the operation of the back-lighted thyratron. A 100% ionized hydrogen plasma with density of 1.7/spl times/10/sup 16/ cm/sup -3/ homogeneous in space and monotonically varying in time with a time scale on the order of /spl mu/secs is straightforwardly achievable. The desired plasma density for lens experiments can be achieved very simply by controlling either the applied voltage, the beam entry time or other parameters. This scheme presents a simple device with the ability to support a plasma with density ranging from 10/sup 12/ cm/sup -3/ to above 10/sup 16/ cm/sup -3/. The structure also facilitates the particle beam entry and the components are vacuum compatible. The device is small, simple, robust,easy to adjust, can be operated at high repetition rates, and has a long life time.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Current Practice of Interventional Radiology (1992)

Current practice of interventional radiology , Current practice of interventional radiology , کتابخانه دیجیتالی دانشگاه علوم پزشکی و خدمات درمانی شهید بهشتی
Study and technological realization about heterogeneous data integration based on XML Schema (2009)

The data Integration method based XML Schema is put forward in this paper, by the combination of model method based XML and schema mapping method, schema integration is realized, thus, public schema is produced, lastly, the mapping rules between public schema and local schema are created. The process of this method, such as schema conversion, conflict resolution and schema Integration, is particularly presented. In the end, the application of this method is demonstrated by means of examples. The method has been proved to be feasible by experimental results.