gebhart/patrepeval huggingface dataset:
Solid sorbent methodology for formaldehyde monitoring (1982)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid sorbent methodology for formaldehyde monitoringT. G. Matthews and T. C. HowellCite this: Anal. Chem. 1982, 54, 9, 1495–1498Publication Date (Print):August 1, 1982Publication History Published online1 May 2002Published inissue 1 August 1982https://pubs.acs.org/doi/10.1021/ac00246a011https://doi.org/10.1021/ac00246a011research-articleACS PublicationsRequest reuse permissionsArticle Views134Altmetric-Citations20LEARN 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
A Study of the Effect of Energetic Flux Bombardment on Intensified Plasma-Assisted Processing. (1997)

An investigation of the plasma nitriding mechanism under intensified conditions (average particle energy up to 1200 eV) was carried out using a triode configuration. The significance of the different physical processes taking place during intensified plasma nitriding, such as sputtering, implantation, defect generation, redeposition and diffusion were investigated experimentally, while theoretical predictions were obtained by using the TRIM (transport of ions in matter) code. A titanium-base alloy was selected as the substrate material. Sputtering yield in an inert atmosphere was found to exhibit three regimes as a function of incoming particle energy. The low energy and high energy regimes were found to be in agreement with the theoretical predictions while the intermediate regime showed a reduced level of sputtering yield independent of energy. This was the first time that such reduced sputtering yield was observed and was attributed to the onset of other physical processes such as generation of bulk defects (vacancies). Sputtering during nitriding was overshadowed by the development of the nitride layer. Implantation studies showed that, N atoms can be implanted to the very near-surface region ($$200 eV. Theoretical predictions showed that vacancy generation initiates at particle energies $>\sim$300 eV and this process can exercise significant effects on N diffusion at energies $>$440 eV. The present results suggest that the primary role in the intensified plasma process is played by the ions since they possess higher energies and their effect is complimented by the energetic neutrals. Enhanced diffusivities (five orders of magnitude higher) were realized under intensified processing conditions over conventional processing. In deposition experiments, a threshold energy was identified ($\sim$150 eV) that is required to produce grain refinement and the formation of a denser and stable nitride structure at the surface. A model was developed on the premise that N diffusivity is proportional to the vacancy concentration and was consistent with the experimental evidence. An assessment of important engineering properties showed that significant improvements can be achieved by intensified plasma nitriding.
Nitrogen Regulation in Bacteria and Archaea (2007)

A wide range of Bacteria and Archaea sense cellular 2-oxoglutarate (2OG) as an indicator of nitrogen limitation. 2OG sensor proteins are varied, but most of those studied belong to the PII superfamily. Within the PII superfamily, GlnB and GlnK represent a widespread family of homotrimeric proteins (GlnB-K) that bind and respond to 2OG and ATP. In some bacterial phyla, GlnB-K proteins are covalently modified, depending on enzymes that sense cellular glutamine as an indicator of nitrogen sufficiency. GlnB-K proteins are central clearing houses of nitrogen information and bind and modulate a variety of nitrogen assimilation regulators and enzymes. NifI(1) and NifI(2) comprise a second widespread family of PII proteins (NifI) that are heteromultimeric, respond to 2OG and ATP, and bind and regulate dinitrogenase in Euryarchaeota and many Bacteria.
The roles of mesenchymal stem cells in tumor inflammatory microenvironment (2014)

Tumor behavior is not entirely determined by tumor cells. Studies have demonstrated that a variety of non-tumor cells in the tumor microenvironment affect tumor behavior; thus, a new focus of cancer research has been the development of novel cancer treatment ideas and therapeutic targets based on the effects of these cells. Mesenchymal stem cells (MSCs) are an important component of the tumor microenvironment; however, previous studies have produced controversial results regarding whether MSCs promote or inhibit tumor growth and progression. In particular, Naïve MSCs and tumor-derived MSCs (T-MSCs) have different functions. Naïve MSCs could exert bidirectional effects on tumors because these cells can both promote and inhibit tumor progression while T-MSCs promote tumor progression due to influences from the tumor itself and from the inflammatory tumor microenvironment. As an unhealed wound, tumor produces a continuous source of inflammatory mediators and causes aggregation of numerous inflammatory cells, which constitute an inflammatory microenvironment. Inflammatory factors can induce homing of circulating MSCs and MSCs in adjacent tissues into tumors, which are then being "educated" by the tumor microenvironment to support tumor growth. T-MSCs could recruit more immune cells into the tumor microenvironment, increase the proportion of cancer stem cells and promote tumor angiogenesis, further supporting tumor progression. However, as plasticity is a fundamental feature of MSCs, MSCs can also inhibit tumors by activating various MSC-based signaling pathways. Studies of the mechanisms by which interactions among tumors, MSCs, and the inflammatory microenvironment occur and methods to disrupt these interactions will likely reveal new targets for cancer therapy.
Power Scaling of End-Pumped Solid-State Rod Lasers by Longitudinal Dopant Concentration Gradients (2008)

The power scalability of solid-state rod lasers in general is limited by the thermally induced mechanical stress approaching the fracture stress of the laser material. In conventional end-pumped lasers, the spatial heat-generation density profiles follow a nearly exponential law, resulting in a reduction of the maximum possible pump power when compared with a transversally pumped rod of the same length. In this paper, an approach for power scaling of end-pumped solid-state lasers by employing crystals with longitudinally varying dopant concentration profiles is presented. The optimum continuously varying dopant concentration profiles for a pump-light single and double pass are derived. Multisegmented crystals approximate these continuous doping profiles. An algorithm for optimizing the segment lengths and dopant concentrations in these crystals is described, the resulting optimum segment data are tabulated, and the relative power capability of these crystals is given.
Complete eradication of hepatic metastasis from colorectal cancer by Yttrium-90 SIRT (2007)

Yttrium-90 (Y-90) radioembolization, also known as selective internal radiation therapy (SIRT), is a regional hepatic therapy used in the treatment of unresectable colorectal cancer (CRC) liver metastases. In SIRT, Y-90 impregnated microspheres are injected into the VASCULAR SUPPLY of hepatic tumor, leading to selective irradiation and necrosis of tumor TISSUE. While several studies demonstrate improved local control and survival with SIRT, the specific indications for this therapy have yet to be defined. Typically, SIRT is given in combination with chemotherapy as multimodal treatment for unresectable hepatic CRC. However, it has also found increasing use as a salvage therapy in chemo-refractory patients. Herein, the authors describe their experience with SIRT as "stand alone" therapy in a surgically-prohibitive, chemotherapy naive patient with hepatic CRC metastasis. The results suggest that Y-90 SIRT may have potential applications beyond its usual role as a palliative or salvage therapy for unresectable hepatic CRC.
The Internet public key infrastructure (2001)

Long before the advent of electronic systems, different methods of information scrambling were used. Early attempts at data security in electronic computers employed some of the same transformations. Modern secret key cryptography brought much greater security, but eventually proved vulnerable to brute-force attacks. Public key cryptography has now emerged as the core technology for modern computing security systems. By associating a public key with a private key, many of the key distribution problems of earlier systems are avoided. The Internet public key infrastructure provides the secure digital certification required to establish a network of trust for public commerce. This paper explores the details of the infrastructure.
Metallothionein 2A expression is associated with cell proliferation in breast cancer (2002)

Metallothioneins (MTs) belong to a family of cysteine-rich, metal-binding intracellular proteins, which have been linked with cell proliferation. In this study, expression levels of the 8 known MT-1 and MT-2 functional isoforms in human invasive ductal breast cancer specimens were determined by RT-PCR. The expression profiles of the MT protein and MT-2A mRNA were further evaluated in 79 cases of human invasive ductal breast carcinoma by immunohistochemistry and in situ hybridization, and correlated with cancer cell proliferation (determined by Ki-67 nuclear antigen immunolabeling). MT-1A, MT-1E, MT-1F, MT-1G, MT-1H, MT-1X and MT-2A but not MT-1B, were detected in breast cancer tissue samples. The MT-2A mRNA transcript was the highest among all the isoforms detected. A positive correlation was observed between MT-2A mRNA and MT protein expression with Ki-67 labeling (P = 0.0003 and P < 0.0001, respectively) but not with apoptosis (P = 0.1244 and P = 0.8189, respectively). Co-localization of the MT protein and Ki-67 nuclear antigen in breast cancer cells was demonstrated by double immunofluorescence staining. There was also significantly higher MT protein and MT-2A mRNA expression in histological grade 3 tumors than in histological grade 1 and 2 tumors. The finding that MT 2A appears to be the main isoform associated with cell proliferation in invasive ductal breast cancer tissues, may have therapeutic implications.
Elaboration of Conductive Thermal Storage Composites Made of Phase Change Materials and Graphite for Solar Plant (2007)

New thermal storage composites made of graphite and PCM (NaNO3∕KNO3 eutectic) have been developed for solar thermal power plants using direct solar steam generation. Those materials, obtained using different elaboration routes (compounding, infiltration, cold compression) and graphite types, are presented with their respective properties (enhanced thermal conductivities, thermal storage capacities, stability) and compared together. Both the laboratory and industrial scales and grades are considered and compared. The infiltration route has been found to be inefficient before the two other ones. Compound composites present isotropic properties and thermal conductivity intensification in the medium range (a factor of 10 for 7wt% in graphite). Cold compressed composites present highly anisotropic properties and strong intensification in thermal conductivity (a factor of 31 at 200°C for 20wt% in graphite). Their melting and solidification temperatures as well as their intrinsic storage capacity are close to the pure salt ones.
Stereoselective Epoxidation of Acyclic Allylic Ethers Using Ketone-Oxone® System (1997)

Abstract The stereselective oxidation of acyclic allylic silyl ethers with dioxiranes generated in situ from Oxone® and ketones provided erythro epoxides.
Predict fetal brain PO2 during hypoxaemia and anemia in sheep. (1987)

The mean brain PO2 of fetal sheep was calculated using equations based on the Krogh cylinder model of O2 diffusion. This analysis took into account the effect of red cell spacing on capillary PO2. Uncompensated changes in arterial O2 tension, the radius of the Krogh cylinder, and metabolic rate of brain tissue were predicted to affect mean brain PO2 more than uncompensated changes in brain blood flow or haemoglobin concentration. Under normal conditions (CaO2 = 7.42 ml/dl), the mean PO2 of the fetal brain was calculated to be about 12 mmHg. Hypoxaemia decreased the predicted mean O2 tension to 7.6 mmHg (CaO2 = 5.19 ml/dl), 5.0 mmHg (CaO2 = 4.11 ml/dl), and 4.3 ml/dl (CaO2 = 3.50 ml/dl). Isovolaemic anaemia reduced mean brain PO2 to 8.7 mmHg (CaO2 = 4.40 ml/dl), 8.3 mmHg (CaO2 = 3.94 ml/dl), and 7.3 mmHg (CaO2 = 3.19 ml/dl). During anaemia the increased distance between red cells was calculated to contribute significantly to brain hypoxaemia. A summary equation is presented which enables the investigator to estimate easily the mean PO2 of the fetal brain when several factors are changed from standard values.
<i>In vitro</i>Inhibition of Diacylglycerol Acyltransferase by Prenylflavonoids from<i>Sophora flavescens</i> (2004)

Four prenylflavonoids, kurarinone ( 1), a chalcone of 1, kuraridin ( 2), kurarinol ( 3), kushenol H ( 4) and kushenol K ( 5) isolated from the roots of Sophora flavescens were investigated for their inhibitory effects on diacylglycerol acyltransferase (DGAT). The flavonoids inhibited DGAT activity in a dose-dependent manner with IC50 values of 10.9 microM ( 1), 9.8 microM ( 2), 8.6 microM ( 3), 142.0 microM ( 4) and 250 microM ( 5). The prenylflavonoids without C3-OH ( 1, 2, 3) showed stronger inhibition than those with C3-OH ( 4, 5). On the other hand, flavonoids without side chains (hesperetin, naringenin, quercetin and kaempferol) did not inhibit the enzyme activity at a final concentration of 800 microM. These data suggest that the lavandulyl side chain and the position of the hydroxy group are important for high DGAT inhibitory activity. Compound 1 also inhibited de novo synthesis of triacylglycerol (TG) in Raji cells.
Didn't you see my message? (2014)

Mobile instant messaging (e.g., via SMS or WhatsApp) often goes along with an expectation of high attentiveness, i.e., that the receiver will notice and read the message within a few minutes. Hence, existing instant messaging services for mobile phones share indicators of availability, such as the last time the user has been online. However, in this paper we not only provide evidence that these cues create social pressure, but that they are also weak predictors of attentiveness. As remedy, we propose to share a machine-computed prediction of whether the user will view a message within the next few minutes or not. For two weeks, we collected behavioral data from 24 users of mobile instant messaging services. By the means of machine-learning techniques, we identified that simple features extracted from the phone, such as the user's interaction with the notification center, the screen activity, the proximity sensor, and the ringer mode, are strong predictors of how quickly the user will attend to the messages. With seven automatically selected features our model predicts whether a phone user will view a message within a few minutes with 70.6% accuracy and a precision for fast attendance of 81.2%
The Longitudinal Outcome of Fibromyalgia: A Study of 1555 Patients (2011)

Although we found no average clinically meaningful improvement in symptom severity overall, 25% had at least moderate improvement of pain over time. The result that emerged from this longitudinal study was one of generally continuing high levels of self-reported symptoms and distress for most patients, but a slight trend toward improvement.
A CMOS Pulse Beamforming Transmitter Design with an On-Chip Antenna Array for Millimeter Wave Imaging Applications (2010)

This paper presents an on-chip folded dipole antenna array with 100-120-GHz pulse transmitter for imaging applications in the millimeter wave (mm-wave) regime. The damping pulse generator is implemented using an on-chip transformer, a capacitor, and an NMOS transistor operated with 100-MHz clock to produce mm-wave pulses which are fed into on-chip antennas. Also, a new CMOS programmable delay circuit controller is developed for pulse beamformability. This array antenna transmitter has been designed and fabricated as a 4.2-mm×4.2-mm chip in 65-nm CMOS technology with 100 on-chip antennas and also 100 corresponding integrated pulse generating circuits.
NLP-supported decision-making (2003)

One way to think about what decision-making will be like in the future is to look at it in terms of the potential combinatorial power of adaptive, intelligent agents with the significant accomplishments of the burgeoning Natural Language Processing (NLP) capabilities of today in technologies that will significantly impact human decision-making, decision support systems, and potentially fully automated decision making.
Prediction of human protein function according to GeneOntology categories (2003)

We have developed a method for prediction of protein function for a subset of classes from the Gene Ontology classification scheme. This subset includes several pharmaceutically interesting categories-transcription factors, receptors, ion channels, stress and immune response proteins, hormones and growth factors can all be predicted. Although the method relies on protein sequences as the sole input, it does not rely on sequence similarity, but instead on sequence derived protein features such as predicted post translational modifications (PTMs), protein sorting signals and physical/chemical properties calculated from the amino acid composition. This allows for prediction of the function for orphan proteins where no homologs can be found. Using this method we propose two novel receptors in the human genome, and further demonstrate chromosomal clustering of related proteins.
Historiografía de la enseñanza de la historia de Latinoamérica en Brasil (2020)

El objetivo de este trabajo es analizar la producción sobre la enseñanza de la historia de Latinoamérica en<br> Brasil, a partir de fuentes documentales como artículos, capítulos de libros, tesis y disertaciones producidas<br> sobre el tema. Para la investigación se consultaron, especialmente, el catálogo de tesis y disertaciones<br> y el portal de periódicos de Capes-Coordinación para el Mejoramiento del Personal de Educación Superior<br> del Ministerio de Educación-Brasil. Se adoptó la perspectiva teórica del historiador Horst Walter Blanke<br> (2006), que reconoce la historia de la historiografía como una actividad con diferentes tipos y funciones.<br> Los tipos incluyen la historia de los historiadores, la síntesis general, la historia de la disciplina, la historia<br> de los métodos, la historia de las ideas históricas, la historia de los problemas, la historia de las funciones<br> del pensamiento histórico, la historia social de los historiadores y la historia de la historiografía teóricamente<br> orientada. En cuanto a sus funciones, son, principalmente, la función afirmativa y la función crítica.<br> Según la tipología y las funciones propuestas por Blanke, se clasificaron los artículos y capítulos. Los resultados<br> parciales indican la existencia de un conjunto de producciones que se destacaron, principalmente,<br> desde principios del siglo XXI. En conclusión, se puede afirmar la existencia de una función afirmativa<br> de esta producción historiográfica, aunque presenta algunas lagunas frente a las demandas del contexto<br> actual de los países latinoamericanos.
Comparative analysis of SERPINA1 gene expression in tumor cell lines (2015)

The expression of SERPINA1 gene in prostate (DU145, PC-3 and LNCaP) and liver (HepG2) tumor cell lines was studied. Alpha1-antitrypsin (AAT) level in the whole cell extracts, secretomes, subcellular fractions and SERPINA1 mRNA level in the corresponding cells were detected. Discordance between expression at these two levels in PC-3 and LNCaP lines was revealed. A new 37 kDa AAT N-terminus truncated isoform was detected in the nuclear extracts of some prostate tumor cell lines. The mechanism of 37 kDa AAT isoform intracellular retention was proposed. Two polyadenylation sites in the 3'-untranslated region of SERPINA1 transcripts were identified. A SERPINA1 gene 3'-untranslated region influence on AAT translation has been discussed.
INFLUENCE of MALTODEXTRIN SYSTEMS ATAN EQUIVALENT 25DE ON ENCAPSULATED ?-CAROTENE LOSS DURING STORAGE (1999)

Glucose, galactose and lactose were added to two maltodextrins, 15 DE and 4 DE, to prepare six maltodextrins of different composition but with the same Dextrose Equivalent (25 DE). A commercial maltodextrin 25 DE was also studied as a reference. Trans-β-carotene was mixed with these maltodextrins and was spray-dried. Stability was evaluated during storage in air at 11 % and 33% RH, at 25C, 35C and 45C. No significant difference was observed between storage at 11 % and 33% RH. Oxidation kinetics showed a rapid first order oxidation, corresponding to surface carotene oxidation, followed by a slower first order kinetic, corresponding to the encapsulated carotene oxidation. Addition of mono and disaccharides to maltodextrins reduces pore size in the maltodextrin network and limits oxygen diffusion. the best preservation was obtained with maltodextrin ‘4 DE + Glucose’ which gave a carotene half-life of 87 weeks, at 25C.
Impulse radio UWB system architecture for smart wireless sensor networks (2005)

This paper introduces a proposal for an impulse radio ultra wideband transceiver system architecture, suitable for its use in smart wireless sensor networks, providing both communication and location capabilities. The concept of smart sensor network has recently gained a huge attention into the scientific world and business markets, mainly due to its feasible applications for environment measurements, threat detection and avoidance, surveillance or localisation purposes. The system architecture description covers from baseband and processing, to RF, pulse generation, pulse reception, signal sampling and synchronization issues.
Cooperate and Survive: Integrated Full-Range Speed Assistance (2008)

Cooperative road-vehicle systems will help reduce the number of accidents and improve traffic flow efficiency. TNO has developed a tool suite to assess to what extent cooperative systems can fulfil this promise