gebhart/patrepeval huggingface dataset:
Catalytic Copolymerization of Ethylene and Polar and Nonpolar α-Olefins in Emulsion (2002)

Novel P,O-chelated Ni(II) catalysts for ethylene and α-olefins polymerization have been used for the copolymerization of ethylene with various long-chain α-olefins in emulsion. Nonfunctionalized α-olefins have been copolymerized with ethylene using miniemulsion to disperse the catalyst at the nanometric level. The influence of the comonomer on catalyst performances as well as latex properties has been analyzed. High comonomer incorporation and stable latex of 30% solid content can be achieved by this method. Other comonomers such as α,ω-dienes, α-olefins bearing a polar functionality in the ω-position, and styrene have also been copolymerized in emulsion. Polymers and latexes have been characterized by an array of techniques including 13C NMR, TEM, DSC, and GPC. It is shown that this emulsion process is specially adapted for copolymerization of ethylene with polar olefins.
A imagem do trabalho: um estudo qualitativo usando fotografia em grupos focais (2007)

A foto é um tipo de imagem usada para investigar os significados atribuídos pelo homem, por meio de técnicas de registro, feedback, fotografia do autor, ou modelo (Neiva-Silva & Koller, 2002). O objetivo da pesquisa foi usar fotos como modelo para analisar a imagem atual do trabalho. Os 50 participantes foram divididos em 10 grupos focais de atuação diversa no mercado de trabalho: formação, seleção, profissionais de nível superior, e profissionais formais e informais pouco qualificados. Foram usadas 36 fotos coloridas e 96 fotos preto e branco de pessoas em situação de trabalho para serem escolhidas pelos participantes. Os participantes anotaram individualmente os números das fotos escolhidas e registraram em poucas palavras o que havia de significativo em cada uma. Os registros foram investigados por técnicas de análise de conteúdo temático. A análise indutiva identificou três categorias (temas) de respostas: i) macrocontexto do trabalho, ii) atributo do trabalhador e iii) setor da economia. Concluiu-se que a imagem do trabalho está fortemente associada a discussões de macrocontexto e de atributos do trabalhador, independentemente do grupo. Os profissionais de nível superior e de formação centram-se em argumentos e reflexões de macrocontexto. Os pouco qualificados distinguem o trabalho real (sobrevivência) do trabalho ideal (escolarizados).
Application of random amplified polymorphic DNA (RAPD) to detect the genotoxic effect of heavy metals (2006)

This paper presents the results of a study on the influence of lead, copper, manganese and cadmium on DNA integrity in plant cells. Plants, as biological indicators, can measure the potential effects of pollutants when they are used to measure effects of heavy metals. The genotoxicity of heavy metals in kidney-bean (Phaseolus vulgaris) seedlings was subjected to RAPD (random amplified polymorphic DNA) analysis. An RAPD 'fingerprinting' technique was used to detect DNA damage in the kidney-bean seedlings treated with two selected heavy metals at concentrations of 150 and 350 mg x l(-1). Polymorphisms became evident as the presence and/or absence of DNA fragments in treated samples compared with the untreated one. At 350 mg x l(-1), a high number of both missing bands and new amplified fragment were observed. Results suggested that a qualitative measure reflecting changes in RAPD profiles were significantly affected at higher concentrations (350 mg x l(-1)) of the tested heavy metals. A total of 467 RAPD fragments in RAPD profiles were detected by using six random primers (decamers) and 224 of these fragments showed polymorphism. There was a distinct distance between the band patterns of treated plants and the control samples when the cluster method was applied. In addition, the result derived from numerical analysis revealed a considerable distance between the band pattern of the plant samples treated with 350 mg x l(-1) heavy metals and the control sample. Finally, a comparison between untreated and treated genomes shows that RAPD analysis can be used to evaluate how the environmental pollutants modify the structure of DNA in living organisms.
Electrochemical Deposition of Copper on n‐Si/TiN (1999)

In this paper we report on the electrochemical deposition of copper onto n‐type silicon with a 30 nm TiN barrier film. We show that the mechanism of nucleation and growth is dependent on the applied potential. At potentials more negative than −0.35 V, instantaneous nucleation of hemispherical clusters is followed by diffusion‐limited growth. In this potential regime, the nucleus density is essentially constant at about Formula . At potentials more positive than −0.35 V, the nucleation and growth kinetics are more complex, and clusters consisting of several nuclei are formed. The cluster density decreases to about Formula at −0.05 V.
Human Cytomegalovirus Infects Caco-2 Intestinal Epithelial Cells Basolaterally Regardless of the Differentiation State (2000)

Human cytomegalovirus (CMV) causes severe disease in immunosuppressed patients and notably infects the gastrointestinal tract. To understand the interaction of CMV with intestinal epithelial cells, which are highly susceptible to CMV infection in vivo, we used the intestinal epithelial cell line Caco-2 and demonstrated that CMV enters predominantly through the basolateral surface of polarized Caco-2 cells. As shown by expression of all three classes of CMV proteins and by visualization of nucleocapsids by transmission electron microscopy, both poorly and fully differentiated Caco-2 cells were permissive to CMV replication. However, infection failed to produce infectious particles in Caco-2 cells, irrespective of the state of differentiation.
Use of an external skeletal fixation device and bone graft for arthrodesis of the metacarpophalangeal joint in horses. (1987)

Arthrodesis of the metacarpophalangeal joint was attempted in 9 adult horses, using a new external skeletal fixation device and autogenous cancellous bone graft. Four horses had excellent results, 2 horses had fair results, arthrodesis failed in 2 horses, and 1 horse fractured the third metacarpal bone. The advantages of the technique included minimal surgical trauma to the area of injury, immediate rigid fixation of the metacarpophalangeal joint, and access for treatment of soft-tissue lesions at the site of injury. Although pin loosening and pin-track infection were complications when the device was in place, all pin tracks healed without complications after device removal.
Properties and formulation of oral drug delivery systems of protein and peptides (2007)

Although most protein pharmaceuticals are usually formulated as a solution or suspension and delivered by invasive routes such as subcutaneous injections, major efforts in both academic and industrial laboratories have been directed towards developing effective oral formulations and increasing the oral absorption of intact protein through the use of formulations that protect the macromolecule and/or enhance it's uptake into the intestinal mucosa. However, in spite of these major attempts, relatively little progress has been made. For the efficient delivery of peptides and proteins by non-parenteral route, in particular via the gastrointestinal tract, novel concepts are needed to overcome significant enzymatic and diffusion barriers. The properties of protein and peptides, which are of major interest in oral delivery, are highlighted in the article. This article reviews the various problems associated and novel approaches for formulation and development of oral protein and peptide drug delivery systems.
Performance Audit of the Operational Stage of Long‐Term Partnerships for the Private Sector Provision of Public Services (2010)

This study investigates the challenges associated with designing a system to evaluate the mature operating phase of long‐term partnerships with the private sector for the provision of public services (PPPS), an area largely neglected by a performance audit (PA) focus. It argues that assessing economy, efficiency and effectiveness (the three Es) are key to any PA, but that their nature is contextually defined; that auditing for effectiveness involves going beyond a ‘watchdog’ to a ‘sheepdog’ role; and that internal evaluation procedures provide insights that are necessary, but not necessary and sufficient to evaluating the achievement of the three Es in the PPPS mature operating stage. Findings are based on an analysis of the literature and an engagement with an audit office. The paper elucidates the meaning of each of the three Es in the context of PA of the PPPS mature operating stage.
Role of Prolactin/Prolactin Receptor Signaling in Human Breast Cancer (2003)

Prolactin (PRL), a hormone utilized at both the endocrine and autocrine levels, stimulates breast epithelial growth, differentiation, and motility. Recent data at the cellular, epidemiologic, and genetic levels have implicated a significant role for this hormone in the pathogenesis of human breast cancer. A family of prolactin receptor (PRLr) isoforms mediates the effects of PRL in human tissue. Now numbering six, these isoforms are co-variably expressed to differing degrees in normal versus malignant tissues. Following ligand binding, proximal PRLr signaling is initiated by three tyrosine kinases, namely Jak2, Src, and Tec. Activation of these kinases results in the triggering of multiple signaling networks, many of which are integrated by the Stat5 transcription factor. Both tyrosine and serine phosphorylation regulate Stat5 activity, as does the interaction of this transcription factor with co-activators and -repressors within the nucleus. Recently our lab has discovered that Stat5 activity is also regulated by its direct interaction with the retrotranslocated complex of PRL and the peptidyl prolyl isomerase cyclophilin B. This interaction results in the release of a repressor of Stat5 DNA-binding, the Peptide Inhibitor of Activated Stat 3 (PIAS3). Taken together, these data suggest that the summated genomic and non-genomic signaling actions of the PRL/PRLr complex serve to trigger an orchestrated pattern of gene expression that contributes to mammary development and the pathobiology of breast cancer.
The Partial Hydrolysis of Ethyltriethoxysilane (1955)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Partial Hydrolysis of EthyltriethoxysilaneM. M. Sprung and F. O. GuentherCite this: J. Am. Chem. Soc. 1955, 77, 15, 3996–4002Publication Date (Print):August 1, 1955Publication History Published online1 May 2002Published inissue 1 August 1955https://pubs.acs.org/doi/10.1021/ja01620a014https://doi.org/10.1021/ja01620a014research-articleACS PublicationsRequest reuse permissionsArticle Views399Altmetric-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 InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
The Heterogeneity of Obstructive Sleep Apnea (Predominant Obstructive vs Pure Obstructive Apnea) (2011)

The present data indicate that breathing stability rather than upper airway collapsibility distinguishes OSA patients with a combination of obstructive and central events from those with pure OSA.
Use of Mitochondrial Antioxidant Defenses for Rescue of Cells With a Leber Hereditary Optic Neuropathy–Causing Mutation (2007)

Gene therapy with antioxidant genes may protect patients with LHON against visual loss.
Hardware-Constrained Multi-Channel Cognitive MAC (2007)

Open spectrum systems allow unlicensed secondary users equipped with cognitive radio to opportunistically access the spectrum underutilized by primary users. Cognitive radio has many advanced features, such as agilely sensing the signal of primary users and utilizing multiple spectrum bands simultaneously, etc. However, the capability of practical cognitive radios is constrained by hardware cost, resulting in partial spectrum sensing and spectrum aggregation limit. In this paper, we take such constraints into consideration and investigate efficient spectrum management in ad hoc cognitive networks with single cognitive radio. A hardware-constrained cognitive MAC, HC-MAC, is proposed to conduct accurate spectrum sensing and spectrum access decision. We identify the optimal spectrum sensing decision for a single secondary transmission pair, and formulate it as an optimal stopping problem. A decentralized MAC protocol is then proposed for the ad hoc cognitive network. Simulation results are given to demonstrate the effectiveness of our proposed protocol.
Precise design of two-dimensional diffractive optical elements for beam shaping (2015)

Diffractive optical elements (DOEs) for beam shaping are widely used in many fields, and there are many kinds of optimization algorithms to design the DOEs for beam shaping. However, only the intensity distribution of the selected sampling points is controlled by these optimization algorithms. The intensity distribution of other points on the output plane is always far away from the ideal distribution. The reason is that the sampling interval on the output plane is not small enough. In this paper, a new modified GS algorithm is presented with a small enough sampling interval on the output plane. A two-dimensional DOE for beam shaping is designed, and the simulation results and the experimental results demonstrate the good performance of this algorithm.
UWB geo-regioning in rich multipath environment (2006)

We introduce geo-regioning as a method to achieve rough localization in asynchronous UWB networks. The ap- proach is to localize the transmitter position by means of the multipath components in the received channel impulse response (signature). To show the principle feasibility of this approach a first regioning algorithm is introduced and tested with measured data. Therefore, a measurement campaign in a rich multipath environment has been performed. A high number of signatures originating from different regions in a room have been collected. The regioning algorithm presented here is based on the a priori knowledge of the average power delay profiles of the different regions. The performance results show that almost all regions can be localized at reasonable SNR and error probability. We conclude that the geo-regioning approach is a promising alternative or supplement to classical time of arrival based approaches in UWB networks.
Effect of Natural HIV-1 Envelope V1-V2 Sequence Diversity on the Binding of V3-Specific and Non-V3-Specific Antibodies (1997)

In past years, much attention has been paid to the HIV-1 envelope (env) protein variable region 3 (V3), termed the principal neutralizing determinant. HIV-1 vaccines were often designed to target V3, and vaccine efficacy was often measured with V3-based assays. Thus, some disappointment resulted when volunteers in first clinical vaccine trials generated V3-specific antibodies that could not protect against V3-similar viruses. We describe an analysis of V1 and V2 sequence effects on antibody binding to V3 and non-V3 determinants. This study involved the preparation of seven full-length (gp160), chimeric env proteins in a vaccinia virus (VV) expression system. Chimeric proteins displayed different V1-V2 sequences but were otherwise identical. A panel of 12 monoclonal antibodies was then tested for binding activities toward the seven chimeras. Results showed that V1-V2 sequences affected antibody binding to env, both in V3 and non-V3 positions. These data demonstrate the enormous complexity of HIV-1 env protein conformation and antigenic determinants. Respect for the complexity of antibody-antigen interactions encourages the design of sophisticated immunoglobulin and protein cocktails for use in HIV-1 therapies and vaccines, respectively.
Chronic Kidney Disease (CKD) as a Systemic Disease: Whole Body Autoregulation and Inter-Organ Cross-Talk (2014)

The inter-organ cross-talk and the functional integration of organ systems is an exceedingly complex process which until now has been investigated with a reductionist approach. CKD perturbs the inter-organ cross-talk and demands central resetting of autonomic (nervous) control of organ systems. Due to limitations inherent to the reductionist approach, we currently identify CKD-related pseudo-syndromes and largely fail at describing the complex systemic inter-relationships set into motion by renal damage and renal dysfunction. A mature technology for a system-analysis approach to physiology and pathophysiology of CKD now exists. System biology will allow in depth understanding of complex diseases like CKD and will set the stage for predictive, preventive and personalized medicine, a long-standing dream of doctors and patients alike.
Modeling of subwavelength resist grating features fabricated by evanescent waves interference (2008)

A lithography technique for fabricating subwavelength surface relief grating features based on evanescent waves interference is investigated by both analytical and numerical approaches. The analytical expressions for the intensity profiles of evanescent waves interference generated by both s- and p-polarized incident plane waves are deduced. The corresponding resist topologies are computed using a numerical scheme based on a modified cellular automata model, as proposed. The influences of polarization and exposure duration on patterning by evanescent waves interference lithography are investigated. The results suggest that this technique is capable to achieve nanoscale line features with linewidths as small as 15 nm, a pitch size of 105 nm, and an aspect ratio as high as 10.7 by appropriate choice of exposure duration and state of polarization for the incident beams.
Nod At Your Computer: Switchless Selection Techniques Using A Headpointing Device (2005)

Current graphical user interfaces often require very fine hand control in order to manipulate a typical pointing device such as a mouse or a rackball. This can be a barrier to many people with physical disabilities who do not have such tine control with their hands. In this paper, the emulation of a mouse by a headpointing device is described. In particular, two plication. Highlighting a phrase or moving a file is accomplished by dragging: pushing the mouse button and holding it down while moving the mouse to a new position. Thus the user's actions are performed with the input device, which then sends messages to the application. The application translates these messages into the required tasks. Figure 1 illustrates this flow of information. switchless techniques are described in which head gestures are used to emdate the mouse buttons. Since most commercial applications only understand mouse button messages such as single and double clicks or drags, the output from alternative
Daylighting with angular-selective skylights: Predicted performance (1996)

The paper outlines a method of providing conventional open skylights with the ability to reject high-elevation light and accept low-elevation light. The angular-dependent transmission so provided is designed to allow skylights to be used in subtropical and tropical regions where overheating would normally limit this method of daylighting. An approximate theory of the angular-dependent transmission is derived and applied to calculate the time dependence of radiant input at various latitudes for clear and diffuse skies. The theory is compared with measurements on scale model skylights and shown to be adequate. The calculated transmission of the skylights is used with measurements of interior illuminance obtained in a scale model building to predict illuminances at other times and latitudes. This approach gave a useful measure of relative daylighting performance in actual buildings but not a reliable estimate of absolute illuminances owing to inadequate representation of the lighting performance of actual buildings by the simple scale model used. The angular-selective skylights have been installed in buildings in tropical Australia and the performance is being monitored.
Evidence for the ‘‘zigzag’’ model of the smectic-<i>C</i>phase in the liquid crystal<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mn>4</mml:mn></mml:mrow><mml:mrow><mml:mi mathvariant="script">’</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>-butoxyphenylester 4-decyloxybenzoic acid (4OP10OB): A high-resolution x-ray study (1986)

We report, for the first time to our knowledge, on high-resolution x-ray scattering measurements of the liquid crystal 4'-butoxyphenylester 4-decyloxybenzoic acid (4OP10OB) with emphasis on the smectic-C phase and the smectic-A to smectic-C phase transition. From angular scans in reciprocal space we found that the smectic-C layer planes undergo a continuous tilt ${\ensuremath{\varphi}}_{p}$ with respect to temperature that can be described either by a Landau-type mean-field theory (which includes a sixth-order term in ${\ensuremath{\varphi}}_{p}$) or by a simple scaling form: ${\ensuremath{\varphi}}_{p}$\ensuremath{\sim}[(${T}_{c}$-T)/${T}_{c}$${]}^{0.44}$, where ${T}_{c}$ is the smectic-A--smectic-C transition temperature. Simultaneous measurements of the lattice spacing in the smectic-C phase suggest that the molecules do not behave like rigid rods. We found that the diamagnetic part of the molecule strongly couples to the magnetic field and tilts independently of the aliphatic end chains. The end chains are melted and thus maintain an almost-temperature-independent contact angle to the layer planes. Our measurements are consistent with the ``zigzag'' model of Bartolino, Doucet, and Durand.
CORAÇÃO AMIGO: Uma Estratégia Para Doença Arterial Coronariana (2013)

Como as doenças coronarianas são uma das maiores causas de doenças vasculares, elas necessitam de mudanças no estilo de vida dos sujeitos. Com base nesse fato, aliado ao grande índice de morbi/mortalidade, desenvolveu-se este projeto, visando reabilitar os pacientes cardíacos para que possam retornar a sua vida ativa, de maneira produtiva e satisfatória. Consiste em um estudo descritivo-exploratório de caráter quali-quantitativo, que assiste pacientes pós cirúrgica de revascularização miocárdica. Para monitorar as informações foi utilizada uma planilha com dados de identificação pessoal e um questionário genérico capacidade funcional, limitação física, dor, estado geral de saúde, vitalidade, aspectos sociais, aspectos emocionais e saúde mental. A monitorização tornou-se efetiva na melhora do quadro do paciente e na re-inserção na sociedade torna-se mais breve e efetiva. Desse modo, percebeu-se a importância dessas atividades para a recuperação dos indivíduos com alterações cardiovasculares.
Pulsing Hall Probes for Greater Output (1960)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Donald L. Shirer; Pulsing Hall Probes for Greater Output. Rev. Sci. Instrum. 1 September 1960; 31 (9): 1000–1001. https://doi.org/10.1063/1.1717097 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioReview of Scientific Instruments Search Advanced Search |Citation Search