gebhart/patrepeval huggingface dataset:
Ionomer/ionomer thermoplastic IPNs based on poly(<i>n</i>‐butyl acrylate) and polystyrene (1986)

Abstract Thermoplastic interpenetrating polymer networks (IPNs) were prepared by combining poly( n ‐butyl acrylate) with polystyrene, both polymers crosslinked independently with acrylic acid anhydride (AAA). Decrosslinking of both polymers was carried out by hydrolysis of the anhydride bonds. Neutralization of the carboxylic acid groups to form the ionomer was carried out in a Brabender Plasticorder. Two subclasses of thermoplastic IPNs were studied: (1) Chemically blended thermoplastic IPNs (CBT IPNs) were prepared by synthesizing polymer II in polymer I in a sequential synthesis; (2) mechanically blended thermoplastic IPNs (MBT IPNs) were prepared by melt blending separately synthesized polymers. Rheovibron characterization revealed that of the two combinations, the CBT IPNs were better mixed than the MBT IPNs. Investigations of phase continuity via melt viscosity and modulus suggest that the CBT IPNs have some degree of dual phase continuity. Transmission electron microscopy suggests dual phase continuity and relatively small phase domains, 2000–5000 Å for the CBT IPNs. The mechanical properties from tensile and Izod impact tests showed that the CBT IPNs were stronger than the MBT IPNs.
Determination of acidity in 80% dimethyl sulfoxide-20% water (1974)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of acidity in 80% dimethyl sulfoxide-20% waterErnest H. Baughman and Maurice M. KreevoyCite this: J. Phys. Chem. 1974, 78, 4, 421–423Publication Date (Print):February 1, 1974Publication History Published online1 May 2002Published inissue 1 February 1974https://doi.org/10.1021/j100597a021RIGHTS & PERMISSIONSArticle Views1447Altmetric-Citations40LEARN 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 InReddit PDF (360 KB) Get e-Alerts
Effects of Granule-Associated Protein PhaP on Glycerol-Dependent Growth and Polymer Production in Poly(3-Hydroxybutyrate)-Producing <i>Escherichia coli</i> (2007)

Polyhydroxyalkanoates (PHAs) are accumulated as intracellular granules by many bacteria under unfavorable conditions, enhancing their fitness and stress resistance. Poly(3-hydroxybutyrate) (PHB) is the most widespread and best-known PHA. Apart from the genes that catalyze polymer biosynthesis, natural PHA producers have several genes for proteins involved in granule formation and/or with regulatory functions, such as phasins, that have been shown to affect polymer synthesis. This study evaluates the effect of PhaP, a phasin, on bacterial growth and PHB accumulation from glycerol in bioreactor cultures of recombinant Escherichia coli carrying phaBAC from Azotobacter sp. strain FA8. Cells expressing phaP grew more, and accumulated more PHB, both using glucose and using glycerol as carbon sources. When cultures were grown in a bioreactor using glycerol, PhaP-bearing cells produced more polymer (2.6 times) and more biomass (1.9 times) than did those without the phasin. The effect of this protein on growth promotion and polymer accumulation is expected to be even greater in high-density cultures, such as those used in the industrial production of the polymer. The recombinant strain presented in this work has been successfully used for the production of PHB from glycerol in bioreactor studies, allowing the production of 7.9 g/liter of the polymer in a semisynthetic medium in 48-h batch cultures. The development of bacterial strains that can efficiently use this substrate can help to make the industrial production of PHAs economically feasible.
25 years of structural monitoring using fiber optic sensors (2011)

This paper describes selected work in the area of fiber optic smart structures performed by the author and his colleagues at McDonnell Douglas, Blue Road Research and Columbia Gorge Research over the past 25 years. It is intended to provide an overview of some of the developments in the field and how it evolved over this time span. Application areas that will be addressed include aerospace, civil structures and composite materials.
Efficacy of Rapamycin in Scleroderma: A Case Study (2008)

Scleroderma is a common autoimmune disorder with no effective therapy. Current concepts of scleroderma include the hypothesis that scleroderma results from excess conversion of endothelial cells to fibroblast like cells, called endothelial mesenchymal transformation. This process is thought to be mediated by cytokines including transforming growth factor beta (TGFb), which causes increased collagen synthesis, resulting in fibrosis, the hallmark of the disease. In vitro studies have hypothesized that rapamycin may be of benefit in scleroderma due to antagonism of collagen synthesis. Given that rapamycin has antiangiogenic activities, inhibits wound healing, and prevents the synthesis of collagen in vivo, we tried rapamycin in a patient with scleroderma. We observed rapid improvement in skin stiffness and mobility. Our results provide the rationale for larger clinical trials of rapamycin in scleroderma and other fibrotic disorders.
Storage stability of synfuels from oil shale. 3. Studies with actual shale-derived middle distillates (1983)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStorage stability of synfuels from oil shale. 3. Studies with actual shale-derived middle distillatesJohn W. Frankenfeld, William F. Taylor, and Dennis W. BrinkmanCite this: Ind. Eng. Chem. Prod. Res. Dev. 1983, 22, 4, 622–627Publication Date (Print):December 1, 1983Publication History Published online1 May 2002Published inissue 1 December 1983https://pubs.acs.org/doi/10.1021/i300012a020https://doi.org/10.1021/i300012a020research-articleACS PublicationsRequest reuse permissionsArticle Views83Altmetric-Citations18LEARN 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 options Get e-Alerts
Unprecedented Occurrence of Isoaspartic Acid in a Plant Cyclopeptide (2012)

Three structurally related cycloheptapeptides, cyclocitropsides A-C, have been isolated from a MeOH extract of the root bark of Citropsis articulata, a medicinal plant in Uganda. Their sequences were elucidated on the basis of their MS/MS fragmentation, extensive 2D-NMR, chemical degradation, and biochemical modifications. Surprisingly, the sequence of cyclocitropside C differed from that of cyclocitropside B only by an Asp(5)/isoAsp(5) substitution. This is the first report of an isoAsp residue in a plant cyclic peptide.
The vanilloid receptor TRPV1 is activated and sensitized by local anesthetics in rodent sensory neurons (2008)

Local anesthetics (LAs) block the generation and propagation of action potentials by interacting with specific sites of voltage-gated Na(+) channels. LAs can also excite sensory neurons and be neurotoxic through mechanisms that are as yet undefined. Nonspecific cation channels of the transient receptor potential (TRP) channel family that are predominantly expressed by nociceptive sensory neurons render these neurons sensitive to a variety of insults. Here we demonstrated that the LA lidocaine activated TRP channel family receptors TRPV1 and, to a lesser extent, TRPA1 in rodent dorsal root ganglion sensory neurons as well as in HEK293t cells expressing TRPV1 or TRPA1. Lidocaine also induced a TRPV1-dependent release of calcitonin gene-related peptide (CGRP) from isolated skin and peripheral nerve. Lidocaine sensitivity of TRPV1 required segments of the putative vanilloid-binding domain within and adjacent to transmembrane domain 3, was diminished under phosphatidylinositol 4,5-bisphosphate depletion, and was abrogated by a point mutation at residue R701 in the proximal C-terminal TRP domain. These data identify TRPV1 and TRPA1 as putative key elements of LA-induced nociceptor excitation. This effect is sufficient to release CGRP, a key component of neurogenic inflammation, and warrants investigation into the role of TRPV1 and TRPA1 in LA-induced neurotoxicity.
Dimensional accuracy of ankle-foot orthoses constructed by rapid customization and manufacturing framework (2011)

Passive-dynamic ankle-foot orthoses (PD-AFOs) constitute a class of ankle braces that rely on material properties and physical features to establish functional characteristics such as bending or rotational stiffness. We have developed a novel framework that combines a fully parameterized PD-AFO computer-aided design (CAD) model and free-form fabrication to rapidly manufacture customized PD-AFOs. The three-dimensional locations of select anatomic landmarks serve to fit customize the PD-AFO CAD model. A virtual orthopedic alignment process and selection of discrete design parameter values further customize the orthosis, which is fabricated via selective laser sintering. CAD models were customized and full-scale orthoses were manufactured for two nondisabled subjects. The surface of one half-scale CAD model was marked with 3 mm hemispherical dimples, and four orthoses were manufactured in different build orientations and positions. Dimensional accuracy was determined by calculating discrepancies between corresponding CAD and fabricated orthoses interdimple distances. Subjective evaluations of the full-scale PD-AFOs following use in gait were positive. Dimension discrepancies were well under a 2 mm tolerance for the four half-scale orthoses. Mean foot plate, strut, and cuff component discrepancies were 0.31 +/- 0.28, 0.34 +/- 0.08, 0.52 +/- 0.39 mm, respectively, and 0.29 +/- 0.23 mm for the overall orthosis. Dimensional accuracy of the rapid customization and manufacturing framework was well within tolerances suggested in the literature.
Towards the Automotive HMI of the Future: Overview of the AIDE-Integrated Project Results (2010)

The Adaptive Integrated Driver-vehicle interfacE (AIDE) is an integrated project funded by the European Commission in the Sixth Framework Programme. The project, which involves 31 partners from the European automotive industry and academia, deals with behavioral and technical issues related to automotive human-machine interface (HMI) design, with a particular focus on integration and adaptation. The project involves tightly integrated empirical research, driver-behavior modeling, and methodological and technological development. This paper provides an overview of the AIDE Sub-Project 3 results dealing with the design, development, and integration of the AIDE system in three prototype vehicles, together with the evaluation results of the trials.
Thermal radiation heat transfer (3rd revised and enlarged edition) (1992)

This book first reviews the overall aspects and background information related to thermal radiation heat transfer and incorporates new general information, advances in analytical and computational techniques, and new reference material. Coverage focuses on radiation from opaque surfaces, radiation interchange between various types of surfaces enclosing a vacuum or transparent medium, and radiation including the effects of partially transmitting media, such as combustion gases, soot, or windows. Boundary conditions and multiple layers are discussed with information on radiation in materials with nonunity refractive indices.
Path Computation Element Communication Protocol (PCEP) Requirements and Protocol Extensions in Support of Global Concurrent Optimization (2009)

The Path Computation Element Communication Protocol (PCEP) allows Path Computation Clients (PCCs) to request path computations from Path Computation Elements (PCEs), and lets the PCEs return responses.When computing or reoptimizing the routes of a set of Traffic Engineering Label Switched Paths (TE LSPs) through a network, it may be advantageous to perform bulk path computations in order to avoid blocking problems and to achieve more optimal network-wide solutions.Such bulk optimization is termed Global Concurrent Optimization (GCO).A GCO is able to simultaneously consider the entire topology of the network and the complete set of existing TE LSPs, and their respective constraints, and look to optimize or reoptimize the entire network to satisfy all constraints for all TE LSPs.A GCO may also be applied to some subset of the TE LSPs in a network.The GCO application is primarily a Network Management System (NMS) solution.This document provides application-specific requirements and the PCEP extensions in support of GCO applications.
Clipping coupons in cyberspace: A proposed model of behavior for deal-prone consumers (2000)

The use of cents-off coupons by consumers is a widespread phenomenon and is well documented in the marketing literature. Recently, coupons have become available in electronic form on the World Wide Web. This article introduces an adaptation of the theory of planned behavior applied to coupon usage that encapsulates both traditional and electronic environments. A careful review of the couponing literature is presented, along with a proposed theoretical framework. A methodology for empirical verification is suggested and managerial implications are discussed, along with avenues for further research. © 2000 John Wiley & Sons, Inc.
Impact of Nanoscale Topography on Genomics and Proteomics of Adherent Bacteria (2011)

Bacterial adhesion onto inorganic/nanoengineered surfaces is a key issue in biotechnology and medicine, because it is one of the first necessary steps to determine a general pathogenic event. Understanding the molecular mechanisms of bacteria-surface interaction represents a milestone for planning a new generation of devices with unanimously certified antibacterial characteristics. Here, we show how highly controlled nanostructured substrates impact the bacterial behavior in terms of morphological, genomic, and proteomic response. We observed by atomic force microscopy (AFM) and scanning electron microscopy (SEM) that type-1 fimbriae typically disappear in Escherichia coli adherent onto nanostructured substrates, as opposed to bacteria onto reference glass or flat gold surfaces. A genetic variation of the fimbrial operon regulation was consistently identified by real time qPCR in bacteria interacting with the nanorough substrates. To gain a deeper insight into the molecular basis of the interaction mechanisms, we explored the entire proteomic profile of E. coli by 2D-DIGE, finding significant changes in the bacteria adherent onto the nanorough substrates, such as regulations of proteins involved in stress processes and defense mechanisms. We thus demonstrated that a pure physical stimulus, that is, a nanoscale variation of surface topography, may play per se a significant role in determining the morphological, genetic, and proteomic profile of bacteria. These data suggest that in depth investigations of the molecular processes of microorganisms adhering to surfaces are of great importance for the design of innovative biomaterials with active biological functionalities.
Interpretation of Diagnostic Tests (2000)

Interpretation of diagnostic tests , Interpretation of diagnostic tests , کتابخانه دیجیتال جندی شاپور اهواز
First-principles study of the structural stability of cubic, tetragonal and hexagonal phases in Mn<sub>3</sub>Z (Z=Ga, Sn and Ge) Heusler compounds (2013)

We investigate the structural stability and magnetic properties of the cubic, tetragonal and hexagonal phases of Mn3Z (Z=Ga, Sn and Ge) Heusler compounds using first-principles density-functional theory. We propose that the cubic phase plays an important role as an intermediate state in the phase transition from the hexagonal to the tetragonal phases. Consequently, Mn3Ga and Mn3Ge behave differently from Mn3Sn, because the relative energies of the cubic and hexagonal phases are different. This result agrees with experimental observations for these three compounds. The weak ferromagnetism of the hexagonal phase and the perpendicular magnetocrystalline anisotropy of the tetragonal phase obtained in our calculations are also consistent with experiment.
IRC Hacks (2004)

While IRC is easy to get into and many people are happy to use it without being aware of what's happening under the hood, there are those who hunger for more knowledge, and this book is for them. IRC Hacks is a collection of tips and tools that cover just about everything needed to become a true IRC master, featuring contributions from some of the most renowned IRC hackers, many of whom collaborated on IRC, grouping together to form the channel #irchacks on the freenode IRC network (irc.freenode.net).
Formation of 2-methylaminopyridine-3-carbaldehyde and the corresponding methylimine by ring-opening and ring-closing reactions of 3-cyano-1-methylpyridinium iodide in N-sodium hydroxide (1971)

Steam distillation of a solution of 3-cyano-1-methylpyridinium iodide in N-sodium hydroxide yields a mixture of 2-methylaminopyridine-3-carbaldehyde (I) and the corresponding methylimine (II). The formation of the former most probably proceeds via ring opening of the pseudo-base to give 2-formyl-5-methylaminopenta-2,4-dienenitrile (III)(or a tautomer). Ring closure of this intermediate should give 1,2-dihydro-2-imino-1-methyl-pyridine-3-carbaldehyde (IV), which under the reaction conditions would undergo the Dimroth rearrangement. Methylamine is also a reaction product, and could be formed by hydrolysis either of the intermediate (III) or of 2-methylaminomethylene-5-oxopent-3-enenitrile, the latter being formed by an initial attack at the 6-position. The methylimine (II) could be formed by the reaction of compound (I) with methylamine. Assignment of structure (I) is based on n.m.r. spectrometry and the fact that a Cannizzaro reaction yields an alcohol and a carboxylic acid, the latter giving 2-methylaminopyridine on decarboxylation. Further, the reaction of compound (I) with methyl iodide yields 3-formyl-1-methyl-2-methylaminopyridinium iodide, which on treatment with sodium hydroxide is converted into 1,2-dihydro-1-methyl-2-methyliminopyridine-3-carbaldehyde. Bromination and nitrosation of compound (I) yield 5-bromo-2-methylaminopyridine-3-carbaldehyde and 2-methyl(nitroso)-aminopyridine-3-carbaldehyde, respectively.
Document skew detection based on local region complexity (2002)

A new method is proposed for detecting skew in document images which contain a mixture of text areas, photographs, figures, charts, and tables. Two basic ideas are introduced in the method. One idea is that a new parameter is used for skew detection to discern the orientation of text lines in document images. This parameter is based on the document image complexity and is obtained from the number of transitions from white to black pixels or vice versa. The other idea is that skew is detected in local regions in which only text lines are expected. Such local regions are extracted from a document image automatically and the obtained skew angle is defined as the overall document skew. Document skew has been measured in experiments with an error of 0.12 degrees on the average for all test documents.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Training artificial neural networks using variable precision incremental communication (2002)

We have earlier proposed incremental inter-node communication to reduce the communication cost as well as time of the learning process in artificial neural networks. In the incremental communication, instead of communicating the full magnitude of an input (output) variable of a neuron, only the increment/decrement to the previous value of the variable, using reduced precision, is sent on a communication link. In this paper, a variable precision incremental communication scheme is proposed. Variable precision, which can be implemented in either hardware or software, can further reduce the complexity of intercommunication and speed up the computations in massively parallel computers. This scheme is applied to the multilayer feedforward networks and simulation studies are carried out. The results of our simulations reveal that, regardless of the degree of the complexity of the problems used, variable precision scheme has stable convergence behavior and shows considerable degree of saving in terms of the number of bits used for communications.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Highly integrated InP HBT optical receivers (1999)

This paper presents two highly integrated receiver circuits fabricated in InP heterojunction bipolar transistor (HBT) technology operating at up to 2.5 and 7.5 Gb/s, respectively. The first IC is a generic digital receiver circuit with CMOS-compatible outputs. It integrates monolithically an automatic-gain-control amplifier, a digital clock and data recovery circuit, and a 1:8 demultiplexer, and consumes an extremely low 340 mW of power at 3.3 V, including output buffers. It can realize a full optical receiver when connected to a photo detector/preamplifier front end. The second circuit is a complete multirate optical receiver application-specific integrated circuit (ASIC) that integrates a photodiode, a transimpedance amplifier, a limiting amplifier, a digital clock and data recovery circuit, a 1:10 demultiplexer, and the asynchronous-transfer-mode-compatible word synchronization logic. It is the most functionally complex InP HBT optoelectronic integrated circuit reported to date. A custom package has also been developed for this ASIC.