gebhart/patrepeval huggingface dataset:
EFFECTS OF OXYGEN TRANSPORT LIMITATION ON NITRIFICATION IN THE ACTIVATED SLUDGE PROCESS (1991)

Apseudohomogeneous model of the nitrifying activated sludge process was developed to investigate the effects ofmass-transport resistance and heterotrophic/nitrifier competition on the apparent relationship between dissolved oxygen (DO) concentration and nitrification . The kinetics of both heterotrophic carbon oxidation and autotrophic ammonia oxidation within activated sludge flocs were described by an interactive-type, multiple-substrate-limiting model. The values for the model's parameters were estimated from a series of experiments that were conducted in laboratory-scale nitrifying activated sludge reactors . Using the estimated parameter values, the model was used to simulate the effect oforganic shock loads and steady-state nitrification efficiency over a typical range of mean cell retention times (MCRTs), DO concentrations, and levels of mass-transport resistance . Varying oxygen transport effects, MCRTs, and heterotrophic/autotrophic competition for DO can combine to give apparent nitrification-limiting DO concentrations that range from 0.5 mg/L to as high as4.0 mg/L. Res. J. Water Pollut. Control Fed., 63, 208 (1991) .
Active Conformation of Seven‐Membered‐Ring Benzolactams as New ACAT Inhibitors: Latent Chirality at <i>N</i>5 in the 1,5‐Benzodiazepin‐2‐one Nucleus (2011)

Nitrogen chirality: Potent new ACAT inhibitors with seven-membered-ring benzolactams as the core structures were first prepared, and the axial chirality recognized by the enzyme was clarified (e.g., 1; see scheme). The chirality at the axis (aS) of 1 controls the conformation of the entire lactam ring, causing the N5-CH3 to arrange in a pseudo-equatorial position (i.e., the amine at N5 is a chiral center with the S-configuration) both in the crystal state and in solution. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
A local area network on a shoe string (2002)

The design and implementation of a local area network for the Department of Mathematics and Computer Science at Western Carolina University are presented. This was part of a project to establish one of many local area networks which will eventually be connected by a campus backbone. The various design stages and work details that should be addressed before installing a local area network are discussed. A schematic design of the layout of the network is included.
El cemento portland y su potencial uso en ingeniería de tejido óseo. Fase I: estudios de biocompatibilidad-efectos del hidróxido de calcio (2006)

Actualmente existe una creciente e insatisfecha demanda de substitutos óseos con buen desempeño, tanto desde el punto de vista biológico como mecánico. Basados en las excelentes propiedades mecánico-estructurales del cemento pórtland, se plantea un estudio exploratorio de biocompatibilidad de este material. Se prepararon substratos de cemento pórtland gris tipo I bajo diferentes tratamientos (neutralizado-SN, carbonatado-SC, y no neutralizado-SnN), los cuales fueron luego sometidos a un ensayo de contacto directo con células CHO y HOS durante 24 h. Los substratos se caracterizaron por SEM, y tinciones con fnolftaleía para determinar su pH; mientras que la evaluación del estado del cultivo fue realizada por microscopía de contraste de fase. Los resultados indican que el pH fue mayor para SnN (> 12,0), seguido de SN, y finalmente de los SC (≈ 7,4); de igual manera se observó que la citotoxicidad de los substratos disminuyó en proporción al valor del pH. Se postula que el Ca(OH)2 formado durante la hidratación del cemento es el causante del efecto tóxico de éste, y que al agotar las fuentes de Ca(OH)2, ya sea por carbonatación o neutralización, se afecta de manera positiva la biocompatibilidad del cemento pórtland.
Pearls and Pitfalls, Part 2 (2016)

This issue of Seminars provides readers with experts' personal approaches to the diagnosis and management of various neurologic disorders. However, the one key element shared by all authors—and ourselves—is the patient's neurologic history, which remains one of the prime factors in achieving a precise diagnosis. In each chapter, our experts have included some features of the patient history that they use on a daily basis. It is worth reminding ourselves of the importance of history-taking, especially in an era of electronic medical records, time-pressured visits, and an overreliance on imaging and the laboratory.
Efficacy of Short-Term High-Dose Statin Pretreatment in Prevention of Contrast-Induced Acute Kidney Injury: Updated Study-Level Meta-Analysis of 13 Randomized Controlled Trials (2014)

High-dose statin pre-treatment significantly reduced overall incidence of CIAKI in patients undergoing CAG, and emerges as an effective prophylactic measure to prevent CIAKI.
Magma chamber and mantle reflections – East Pacific Rise (1980)

A multichannel seismic reflection profile of stacked and migrated common depth point data across the East Pacific Rise near the Siqueiros Fracture Zone supports and extends previous observations (at two crossings 27 to 50 km to the south) of reflections assumed to be from the top of a magma chamber and of reflections from the M‐discontinuity. The reflection assumed to be associated with the top of the magma chamber is 1‐1/2 to 2 km below the sea floor. The combined results of the three crossings suggest that the chamber is continuous along the Rise crest and that its width, which varies from 2 to 8 km, correlates with the width of the Rise crest as indicated by the bathymetric contours. The reflections from the crust‐mantle boundary can be detected beneath the raised axial block of the East Pacific Rise and although weak, can be detected beneath the magma chamber.
Germplasm Cryobanking in Zebrafish and Other Aquarium Model Species (2009)

During the last few years zebrafish and other aquarium fish have become more important model system species. In zebrafish valuable biotechnological lines are constantly emerging, and the creation of cryobanks of viable fish sperm, oocytes, and embryos from those lines is a constant and important demand. Cryopreservation is an essential tool for storing specific genetic material and would significantly help in the conservation of such lines, facilitating daily procedures in labs and companies working with this species. In this review, all advances achieved in this field are presented. Protocols for sperm cryopreservation are described, and the new directions of approaches in embryo and oocyte cryopreservation and also in blastomeres, and primordial germ cell cryopreservation are discussed.
Temporal variations of the postnatal rat urinary proteome as a reflection of systemic maturation (2008)

The rat kidney matures during the first 2 wk of life, suggesting that temporal variations in the urinary proteome may occur during this period. We describe the urine proteome during postnatal development in the rat and demonstrate specific proteomic changes corresponding to developmental milestones. Urine was collected from 30 rats at five postnatal (P) days of life (P1, P3, P7, P14, and >P30) by bladder aspiration. The proteome was assessed by nano-ESI-LC-MS/MS. For identification, we used stringent criteria to provide a 1% false positive rate at the peptide level. The proteins in common at each time interval decreased during postnatal maturation. When comparing all five developmental times, six proteins were ubiquitously present. We detected 14 proteins involved with cellular adhesion, structure, or proliferation and differentiation only during neonatal development. Additionally, 30 proteins were specific to adults, of which 13 originated from the prostate or seminal vesicle. This is the first MS characterization of the normal urinary proteome in early postnatal rodent development that demonstrates distinct differences correlating with different stages of tissue maturation. Further characterization of the normal urinary proteome may provide the basis for identification of urinary biomarkers of diseases of the urinary tract.
Establishment of primary human meningiomas as subcutaneous xenografts in mice (2001)

Meningiomas are the most frequently occurring benign central nervous system tumours. We determined whether a subcutaneous animal model of meningioma was feasible by implanting fresh meningioma tissue from six patients into 60 athymic (nude) mice, either as tissue blocks (38 mice) or as cell suspensions (22 mice). The tumour take-rates were 74% (block) and 50% (suspension), and the xenografts retained the original tumour grade and subtype morphology by light microscopy. Comparison of cell proliferation markers in xenografts and original tumours gave similar immunohistochemical score rates for Ki-67, but not for PCNA. With the exception of one atypical tumour surgical specimen, all tumours lacked p53 immunopositivity. Transmission electron microscopy of sections of tumour xenografts revealed ultrastructural features, including desmosomes and desmosome-like structures, characteristic of well-differentiated meningiomas. The xenografts grew progressively with a volume increase of more than 10-fold over 6-11 months and an apparent doubling time of 16 weeks. This study demonstrates the utility of the subcutaneous meningioma xenograft as a model for further biological and therapeutic studies.
Safe Science (2005)

Scientific laboratories can sometimes be dangerous places to work, and safety concerns can have a significant impact on the scientific research process. Because safety practices specify both behavioral norms and technical standards, they provide an opportunity to better understand the relationships between the organizational and epistemic aspects of scientific culture. This paper presents a case study of a ‘pulsed-power’ facility at the US Los Alamos National Laboratory, where electrical hazards are a major concern. Drawing on work by Mary Douglas and others, I show how safety in the pulsed-power laboratory can be understood in terms of concepts of order and pollution. In particular, I argue that the laboratory is a cultural setting that generates both material and social order in science. The concept of ‘traceability’ - the ideal of being able to trace visual and logical connections between system components - is the central metaphor for material order in this setting. This metaphor is enacted in the design of pulsed-power systems and through various safety procedures that function as rituals. These rituals, and the concept of traceability itself, also contribute to social order by helping to shape norms of conduct in the laboratory, which in turn structure relationships between the laboratory work group and the larger institution.
Simulation of the switching of an All-Optical Flip-Flop based on a SOA/DFB-Laser Diode Optical Feedback Scheme (2006)

All-optical flip-flop operation using a SOA and DFB laser diode in an optical feedback scheme is presented. The device is based on the gain difference in the SOA and DFB laser diode for the different stable states. Flip-flop operation is shown for set and reset pulse widths of 10 and 150 ps of 5 W and 3.5 mW respectively.
O-GlcNAc-glycosylation of β-catenin regulates its nuclear localization and transcriptional activity (2008)

Beta-catenin plays a role in intracellular adhesion and regulating gene expression. The latter role is associated with its oncogenic properties. Phosphorylation of beta-catenin controls its intracellular expression but mechanism/s that regulates the nuclear localization of beta-catenin is unknown. We demonstrate that O-GlcNAc glycosylation (O-GlcNAcylation) of beta-catenin negatively regulates its levels in the nucleus. We show that normal prostate cells (PNT1A) have significantly higher amounts of O-GlcNAcylated beta-catenin compared to prostate cancer (CaP) cells. The total nuclear levels of beta-catenin are higher in the CaP cells than PNT1A but only a minimal fraction of the nuclear beta-catenin in the CaP cells are O-GlcNAcylated. Increasing the levels of O-GlcNAcylated beta-catenin in the CaP cells with PUGNAc (O- (2-acetamido-2-deoxy-d-gluco-pyranosylidene) amino-N-phenylcarbamate) treatment is associated with a progressive decrease in the levels of beta-catenin in the nucleus. TOPFlash reporter assay and mRNA expressions of beta-catenin's target genes indicate that O-GlcNAcylation of beta-catenin results in a decrease in its transcriptional activity. We define a novel modification of beta-catenin that regulates its nuclear localization and transcriptional function.
Marennine, Promising Blue Pigments from a Widespread Haslea Diatom Species Complex (2014)

In diatoms, the main photosynthetic pigments are chlorophylls a and c, fucoxanthin, diadinoxanthin and diatoxanthin. The marine pennate diatom Haslea ostrearia has long been known for producing, in addition to these generic pigments, a water-soluble blue pigment, marennine. This pigment, responsible for the greening of oysters in western France, presents different biological activities: allelopathic, antioxidant, antibacterial, antiviral, and growth-inhibiting. A method to extract and purify marennine has been developed, but its chemical structure could hitherto not be resolved. For decades, H. ostrearia was the only organism known to produce marennine, and can be found worldwide. Our knowledge about H. ostrearia-like diatom biodiversity has recently been extended with the discovery of several new species of blue diatoms, the recently described H. karadagensis, H. silbo sp. inedit. and H. provincialis sp. inedit. These blue diatoms produce different marennine-like pigments, which belong to the same chemical family and present similar biological activities. Aside from being a potential source of natural blue pigments, H. ostrearia-like diatoms thus present a commercial potential for aquaculture, cosmetics, food and health industries.
<i>John Kerr</i><i>I Remember</i> (1947)

Find information about UTP Journals. University of Toronto Press is Canada’s leading academic publisher and one of the largest university presses in North America, with particular strengths in the social sciences, humanities, and business. The Book Publishing Division is widely recognized in Canada for its strength in history, political science, sociology, Indigenous studies, and cultural studies. Internationally, UTP is a leading publisher of medieval, Renaissance, Italian, Iberian, Slavic, and urban studies, as well as studies in book and print culture.
The First Decade of Mandibular Distraction: Lessons We Have Learned (2002)

McCarthy, Joseph G. M.D.; Katzen, Timothy J. M.D.; Hopper, Richard M.D.; Grayson, Barry H. M.D. Author Information
Disruption of selenoprotein biosynthesis affects cell proliferation in the imaginal discs and brain of Drosophila melanogaster (1999)

The patufet gene encodes the Drosophila melanogaster homologue of selenophosphate synthetase, an enzyme required for selenoprotein synthesis, and appears to have a role in cell proliferation. In this paper we analyse the expression pattern of patufet during the development of imaginal discs and brain as well as the function of this gene in relation to cell proliferation. Wild-type organisms showed a highly dynamic pattern of ptuf mRNA expression during larval and pupal development. Co-localization analysis of ptuf mRNA expression and BrdU incorporation showed high levels of ptuf mRNA in dividing cells and low or undetectable levels in non-dividing cells. In addition, [(75)Se] incorporation revealed a major selenoprotein band of 42 kDa. Mutant organisms showed no selenoprotein synthesis, lower levels of cell proliferation, a higher proportion of cells arrested in G(2) as seen by cyclin B labeling and increased levels of reactive oxygen species (ROS). Because most selenoproteins identified so far are antioxidants, the role of ptuf in cell proliferation through the control of the cellular redox balance is discussed.
High speed CMOS imaging (2002)

This paper analyzes basic architectural features of CMOS digital imagers, presents the history of their development, and gives examples of high-speed CMOS active pixel sensor implementation.
MR Monitoring of Cyclooxygenase-2 Inhibition of Angiogenesis in a Human Breast Cancer Model in Rats (2007)

Dynamic MR imaging revealed microvascular permeability to a high-molecular-weight contrast agent was significantly reduced by treatment with celecoxib.
Glycophorins B and C from human erythrocyte membranes. Purification and sequence analysis. (1987)

We have developed methods for the preparative purification of two sialoglycoproteins (glycophorins B and C) from human erythrocyte membranes by high-performance ion exchange and gel permeation chromatography in the presence of Triton X-100. Glycophorin B was obtained without any detectable contaminants, and glycophorin C exhibited a purity of about 90-95%. The amino acid sequence of the intramembranous domain (residues 36-71) of glycophorin B was determined and found to be similar to that of the hydrophobic region of the major sialoglycoprotein (glycophorin A). The amino acid sequence of the hydrophobic domain (residues 49-88) of glycophorin C, that was also determined, agreed completely with the structure recently deduced from cDNA sequencing.
Characterization of Chitin-Based Polymer Hybrids by Temperature-Programmed Analytical Pyrolysis Techniques. 2. Chitin-<i>g</i><i>raft</i>-poly(2-methyl-2-oxazoline)/Poly(vinyl alcohol) Blends (1999)

Chitin-graft-poly(2-methyl-2-oxazoline)/poly(vinyl alcohol) (PVA) blends were characterized by means of analytical pyrolysis techniques such as temperature-programmed pyrolysis−mass spectrometry (TPPy−MS), TPPy−gas chromatography (TPPy−GC) and Py−GC mainly in terms of their miscibility and the site of the intermolecular interaction. The thermal degradation of the chitin derivative/PVA blends took place apparently in two stages reflecting the degradation of both constituent polymers. However, peak-top temperatures for both degradation stages changed as a function of blend composition; the first degradation stage, mostly corresponding to the dehydration of PVA, shifted to higher temperatures when the chitin derivative content is increased in the blend. Although the yields of 2-butenal from the PVA moiety increased by blending the chitin derivative, those of acetamide and N-ethylacetamide from the chitin derivative moiety exhibit an opposite trend. These temperature shifts and the variations in the yields of the pyrolysis products suggested that intermolecular interactions might be contributing to a differing extent as a function of the blend composition. Moreover, the observed degradation behaviors for the chitin derivative/PVA blends showed the opposite trend for the case of the chitin derivative/PVC blend system previously investigated. Thus, the observed degradation mechanisms of this blend system were discussed by comparison with those for the chitin derivative/PVC blend system.
Electron Model of a Spiral Sector Accelerator (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 D. W. Kerst, E. A. Day, H. J. Hausman, R. O. Haxby, L. J. Laslett, F. E. Mills, T. Ohkawa, F. L. Peterson, E. M. Rowe, A. M. Sessler, J. N. Snyder, W. A. Wallenmeyer; Electron Model of a Spiral Sector Accelerator. Rev. Sci. Instrum. 1 October 1960; 31 (10): 1076–1106. https://doi.org/10.1063/1.1716818 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
Thermo-mechanical modification of phase mask local period for advanced fiber Bragg grating fabrication (2003)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text M. Sumetsky, Y. Dulashko, A. Kortan, P. L. Reyes, and P. S. Westbrook, "Thermo-mechanical modification of phase mask local period for advanced fiber Bragg grating fabrication," in Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, Technical Digest (Optica Publishing Group, 2003), paper PD4. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Radiation of electromagnetic waves by spherical-circular microstrip antennas excited by elementary dipoles located on the axis of symmetry (2007)

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Process Temperature Profile and Rheological Properties of Greases from Vegetable Oils (2014)

Greases are composed by lubricating oil dispersed in a thickener that can be a metal soap, polymers or clays. Grease production using vegetable oils is increasing due to biodegradability requirements. Since vegetable oils present a worse oxidation and hydrolysis stability than mineral oils, it is usually difficult to produce a neutral grease using them. Four greases were produced using soybean oil as lubricating oil and lithium 12-hydroxy- stearate as thickener. The maximum temperature of reaction ranged from 230°C to 120°C in a bench process and a reduction in the final product acidity was observed (from 8.2% acid to 0.05% alkaline). Traditional tests to evaluate thickener structure resistance like 10,000-time worked penetration, roll stability and dropping point were performed and results compared. In addition, rheological tests were performed and the results were also compared. Results indicate that it is possible to produce a quite neutral grease using vegetable oils with good thickener structure properties.
Reactivity of the Canine Isolated Internal Mammary Artery, Saphenous Vein, and Coronary Artery to Constrictor and Dilator Substances (1988)

The internal mammary artery (IMA) and saphenous vein (SV) are used routinely in coronary artery (CA) bypass graft surgery. The IMA may develop spasm during surgery, and the SV often develops spasm during removal from the leg. We sought to determine the relative reactivity of the canine CA, IMA, and SV to potential vasoconstrictor substances and especially to determine which vasodilator agents were effective in these different blood vessels. All vessels were arranged as ring segments suspended at optimal stretch in organ baths. Glyceryl trinitrate (GTN) caused relaxation of the three vessels but was less sensitive, less potent (as determined by EC50 values), and had a reduced range of relaxation in the IMA. Papaverine was less sensitive in the IMA as compared with the CA and SV. Nifedipine, verapamil, and diltiazem were potent relaxing agents in all three vessels when precontracted by K+, but were less potent in vessels contracted by the thromboxane mimetic U46619 or phenylephrine, especially in the SV. These studies highlight the marked differences in the response of IMA and CA to constrictor and dilator agents and reinforce the notion that calcium antagonists of different chemical classes have widely differing activities in vascular tissue.
Passively mode-locked Yb:Lu2O3 laser (2004)

A mode locked Yb-laser with host material of Lu2O3 is demonstrated for the first time. Using a saturable absorber mirror ps-pulses and with dispersion compensation pulses as short as 220 fs were obtained at 1033.5 nm.
The Effects of Quetiapine on Sleep in Recovering Alcohol-Dependent Subjects (2014)

Quetiapine XR improves objective sleep continuity and transiently improves subjective insomnia early in recovery from AD.