gebhart/patrepeval huggingface dataset:
Enterobacter sp. Strain SM1_HS2B Manifests Transient Elongation and Swimming Motility in Liquid Medium (2022)

Many species of bacteria change their morphology and behavior under external stresses. In this study, we report transient elongation and swimming motility of a novel Enterobacter sp. strain, SM1_HS2B, in liquid broth under a standard growth condition. When growing in the Luria-Bertani medium, HS2B cells delay their cell division and elongate. Although transient over a few hours, the average cell length reaches over 10 times that of the stationary-state cells. The increase is also cumulative following repeated growth cycles stimulated by taking cells out of the exponential phase and adding them into fresh medium every 2 hours. The majority of the cells attain swimming motility during the exponential growth phase, and then they lose swimming motility over the course of several hours. Both daughter cells due to division of a long swimming cell retain the ability to swim. We confirm that the long HS2B cells swim with rigid-body rotation along their body axis. These findings based on microscopic observation following repeated cycles of growth establish HS2B as a prototype strain with sensitive dependence of size and motility on its physical and biochemical environment. <b>IMPORTANCE</b> Bacteria undergo morphological changes in order to cope with external stresses. Among the best-known examples are cell elongation and hyperflagellation in the context of swarming motility. The subject of this report, SM1_HS2B, is a hyperswarming strain of a newly identified species of enterobacteria, noted as Enterobacter sp. SM1. The key finding that SM1_HS2B transiently elongates to extreme length in fresh liquid medium offers new insights on regulation in bacterial growth and division. SM1_HS2B also manifests transient but vigorous swimming motility during the exponential phase of growth in liquid medium. These properties establish HS2B as a prototype strain with sensitive dependence of size and motility on its physical and biochemical environment. Such a dependence may be relevant to swarming behavior with a significant environmental or physiological outcome.
Wave-Equation Migration Imaging and Cost Comparison – Survey Sinking vs. Shot Profile (2004)

P266 WAVE-EQUATION MIGRATION IMAGING AND COST COMPARISON: SURVEY SINKING VS. SHOT PROFILE 1 D. BEVC 1 A. POPOVICI 2 S. CRAWLEY 2 M. FLIEDNER 1 W. RITCHIE 2 1 3DGeo Development Inc. 4633 Old Ironsides Drive Suite 401 Santa Clara CA 95054 USA 2 3DGeo Development Inc. 16225 Park Ten Place Suite 370 Houston TX 77084 USA Summary We examine imaging results from two common categories of wave-equation migration: survey sinking migration (SSM also commonly referred to as double square root migration or DSR) and shot profile migration (SPM). We sketch an outline of the proof of the two methods
Photo-induced alignment of a photo-crosslinkable liquid-crystalline copolymer film by linearly polarized UV light (1998)

The anisotropic photoreaction of a liquid-crystalline (LC( copolymer comprising one co-monomer being anisotropically photo-crosslinkable by linearly polarized (LP( -UV light and the other being insensitive to UV-irradiation is presented. Polarized UV and IR studies suggested a photo-induced alignment of the mesogenic side groups during the LP-UV photoreaction at the LC temperature range of the copolymer. The direction of the aligned mesogenic groups is parallel to the electric vector of the incident LP-UV light and the induced birefringence is 0.07.
Structure‐Activity Relationships of Au/Al 2 O 3 Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol (2019)

Abstract 1.5 wt. % Au/Al 2 O 3 catalysts were prepared using the deposition‐precipitation or colloid‐deposition method and calcined at different temperatures for the selective oxidative esterification reaction of 1,3‐propanediol and methanol to form methyl 3‐hydroxypropionate (3‐HPM). The catalysts were characterized by nitrogen adsorption, transmission electron microscopy (TEM), X‐ray diffraction (XRD), UV‐Vis diffuse reflectance spectroscopy, X‐ray photoelectron spectra (XPS), CO 2 temperature‐programmed desorption (CO 2 ‐TPD) and NH 3 temperature‐programmed desorption (NH 3 ‐TPD). The effect of the calcination temperature of the catalyst prepared by the deposition‐precipitation method on the catalytic performance for the selective oxidative esterification of 1,3‐propanediol was studied. The results showed that the conversion of 1,3‐propanediol and the selectivity of 3‐HPM increased at first and then decreased with the increase of the calcination temperature of catalyst. The highest conversion of 1,3‐propanediol and selectivity of 3‐HPM at the optimal calcination temperature of 350 °C were 92.0% and 88.5%, respectively. Considering the effects of preparation method and calcination temperature, it could be concluded that the metallic Au nanoparticles with appropriate particle size in coordination with the suitable amount of weak and middle acid and base sites, were favorable to the oxidative esterification of 1,3‐propanediol and methanol to 3‐HPM. Moreover, we found that the 1.5 wt. % Au/Al 2 O 3 catalyst could be effectively recovered without obvious decline of the catalytic properties.
Heidelberg-Retina-Tomograph: Reproduzierbarkeit und Meßfehler bei unterschiedlicher Pupillenweite am Modellauge (1994)

The HRT is capable of measuring volumes with a reasonable accuracy. The accuracy does not depend on the width of the pupil over a wide range of pupil diameters. In cases of very small or very much dilated pupils the accuracy and reproducibility declines.
Review of literature on chicken flavor and report of isolation of several new chicken flavor components from aqueous cooked chicken broth (1972)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReview of literature on chicken flavor and report of isolation of several new chicken flavor components from aqueous cooked chicken brothRichard A. Wilson and Ira KatzCite this: J. Agric. Food Chem. 1972, 20, 4, 741–747Publication Date (Print):July 1, 1972Publication History Published online1 May 2002Published inissue 1 July 1972https://doi.org/10.1021/jf60182a016Request reuse permissionsArticle Views324Altmetric-Citations47LEARN 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 (711 KB) Get e-Alertsclose Get e-Alerts
Path MTU discovery solution space (2018)

Path MTU discovery has turned out to be a thorny problem that has
haunted the Internet community for decades. Lately there has been some
work both at the transport layer and at the network layer. This memo
lists the solutions the author is aware of from the perspective of the
network layer.
The selective activity of lysostaphin in vivo. (1967)

Abstract Thirty-two nasal carriers of Staphylococcus aureus were treated for 7 to 12 days with intranasal lysostaphin. The in vivo response to therapy paralleled the in vitro susceptibility of the organisms to lysostaphin. There was marked reduction in the numbers of S. aureus with a smaller decrease in the numbers of S. albus and no reduction in the numbers of diphtheroids. Reacquisition of coagulase-positive staphylococci was significantly less rapid in subjects with larger numbers of diphtheroids remaining in the nose after therapy than in subjects with smaller numbers of residual flora. Thus, the selective activity of lysostaphin permitted the demonstration of bacterial interference by other strains against recolonization by coagulase-positive staphylococci.
Integrated Online System for a Pyrosequencing-Based Microbial Source Tracking Method that Targets Bacteroidetes 16S rDNA (2011)

Genotypic microbial source tracking (MST) methods are now routinely used to determine sources of fecal contamination impacting waterways. We previously reported the development of a pyrosequencing-based MST method that assigns contamination sources based on shared operational taxonomic units (OTUs) between fecal and environmental bacterial communities. Despite decreasing sequencing costs, pyrosequencing-based MST approaches are not used in routine water quality monitoring studies due in large part to difficulties in handling massive data sets and difficulties in determining sources of fecal contamination. In the studies presented here we describe the development of an online MST tool, PyroMiST ( http://env1.gist.ac.kr/∼aeml/MST.html) that uses total bacterial or Bacteroidetes 16S rDNA pyrosequencing reads to determine fecal contamination of waterways. The program cd-hit was used for OTU assignment and a Perl script was used to calculate the number of shared OTUs. The analyses require only a small number of pyrosequencing reads from environmental samples. Our results indicate that PyroMiST provides a user-friendly web interface for pyrosequence data that significantly reduces analysis time required to determine potential sources of fecal contamination in the environment.
The Basic Toolbox–Acquiring Functional Genomic Data (2003)

Strategies for analyzing the genome include genomic sequencing, cDNA sequencing, expression profiling and protein characterization. Genome sequencing strategies can be based on BAC-based physical maps, shotgun sequencing or a combination of both. Expression can be characterized through microarrays, ESTs, SAGE and MPSS profiling. Protein profiling and sequencing can be done using mass spectrometry. All the data from these high throughput technologies is housed in relational databases for analysis.
Inhibition of Respiratory Burst Activity in Alveolar Macrophages by Bisbenzylisoquinoline Alkaloids: Characterization of Drug-Cell Interaction (1992)

The objective of this study was to investigate the effects of various bisbenzylisoquinoline (BBIQ) alkaloids on respiratory burst activity of alveolar macrophages and to characterize the interaction of these drugs with alveolar phagocytes. BBIQ alkaloids were chosen for study because they exhibit a wide range of antifibrotic potencies in a rat model, with tetrandrine being very effective and tubocurarine being ineffective. These drugs inhibited zymosan-stimulated oxygen consumption with a potency sequence of tetrandrine (TT) approximately fangchinoline (FA) > berbamine (BE) approximately cepharanthine (CE) approximately cycleanine (CY) >> tubocurarine (TU). This inhibition of respiratory burst activity could not be attributed to a drug-induced decline in the ATP content of these pneumocytes. Drug binding to alveolar macrophages was directly dependent on temperature and drug concentration. The sequence for binding capacity was FA > TT approximately BE approximately CY > CE >> TU. Therefore, there was no simple relationship between binding capacity and inhibitory potency. Binding capacity was not related to lipophilicity of these alkaloids. In addition, tetrandrine failed to bind to metabolically dead cells or sonicated macrophage preparations. These data suggest that the interaction of BBIQ alkaloids with phagocytes is not simply nonspecific binding to membrane lipids. Alteration of the cytoskeletal system with vinblastine, taxol, or cytochalasin B decreased tetrandrine binding by approximately 33% when added separately and by 93% when added jointly. Pre-exposure of alveolar macrophages to stimulants increased the ability of BBIQ alkaloids to inhibit both oxygen consumption and superoxide release. These data suggest that the mechanism by which BBIQ alkaloids inhibit activation of phagocytes involves microtubules and bules and microfilaments. Pre-exposure of macrophages to stimulants would change the conformation of cytoskeletal components and may make these structures more susceptible to drug interaction.
η2-Benzyne and η1-benzylidene complexes of niobium with ancillary imido ligands (1992)

Rare η2-benzyne and benzylidene complexes of niobium have been synthesised from [Nb(C5R5)(NR′)Cl2](R = H, Me; R′= 2,6-Pri2C6H3)via intermediate diphenyl and dibenzyl species and their molecular structures have been determined: these complexes are analogues of well-established zirconocene derivatives.
Cognition-inspired homeostasis can balance conflicting needs in robots (2018)

Homeostasis keeps animals alive; it is a fundamental process that allows animals to adapt quickly to their environment. Artificial homeostasis can be used to help robots adapt to changing environments. Previous attempts at developing artificial homeostasis for robots were driven by mimicry of the biochemical machinery that drives homeostasis in humans. By considering homeostasis from a cognitive perspective, we develop a comparatively simple robot controller named CogSis (COGnitive HomeostaSIS) and demonstrate that it can provide homeostasis to a robot, even when there are conflicting needs. We present experiments showing that a robot running CogSis is able to learn from previous experiences and use them to influence future behaviour; can maintain its charge level while attending to another task (warming itself in an area separate from the charging station); and is able to maintain its charge level while avoiding a conflicting need (keeping cool, when the charging station is placed in a hot region of the environment). Results are presented in simulation and from a real robot platform.
Comparison of Radical Scavenging Activity, Cytotoxic Effects and Apoptosis Induction in Human Melanoma Cells by Taiwanese Propolis from Different Sources (2004)

Propolis is a sticky substance that is collected from plants by honeybees. We previously demonstrated that propolins A, B, C, D, E and F, isolated from Taiwanese propolis (TP), could effectively induce human melanoma cell apoptosis and were strong antioxidant agents. In this study, we evaluated TP for free radical scavenging activity by DPPH (1,2-diphenyl-2-picrylhydrazyl). The phenolic concentrations were quantified by the Folin-Ciocalteu method. The apoptosis trigger activity in human melanoma cells was evaluated. TP contained a higher level of phenolic compounds and showed strong capability to scavenge free radicals. Additionally, TP1g, TP3, TP4 and TP7 exhibited a cytotoxic effect on human melanoma cells, with an IC(50) of approximately 2.3, 2.0, 3.3 and 3.3 μg/ml, respectively. Flow cytometric analysis for DNA fragmentation indicated that TP1g, TP2, TP3 and TP7 could induce apoptosis in human melanoma cells and there is a marked loss of cells from the G2/M phase of the cell cycle. To address the mechanism of the apoptosis effect of TP, we evaluated its effects on induction of apoptosis-related proteins in human melanoma cells. The levels of procaspase-3 and PARP [poly(ADP-ribose) polymerase] were markedly decreased. Furthermore, propolins A, B, C, D, E and F in TP were determined using HPLC. The results indicate that TP is a rich source of these compounds. The findings suggest that TP induces apoptosis in human melanoma cells due to its high level of propolins.
The Future of Reconfigurable Systems (1998)

In the decade since FPGAs were invented they have created many new opportunities. Perhaps the most exciting is reconfigurable computing. In this paper we present a vision of the next decade of reconfigurable computing. FPGA architectures will support millions of gates on a chip, requiring the integration of FPGAs with CPUs, DSPs, and SRAMs. Reconfigurable computing specific architectural features will be developed, though their place in the commercial marketplace must be carefully considered. CAD support for reconfigurable system, and commercial applications of reconfigurable computing, will be major keys to deploying reconfigurable computing devices into the mainstream. Finally, we can consider applying the lessons of Run-Time-Reconfiguration within ASIC designs. Hopefully, these technologies can help create a commercial market for reconfigurable computing, making it a truly general-purpose paradigm. Introduction Reconfigurable computing, the harnessing of FPGA logic for com...
Digital Computer Analysis of Induction Machines in Dynamic Systems (1967)

An all-digital simulation of an induction machine and its associated control system is described. The simulation is suitable for analyzing operation either from a constant frequency, constant voltage supply, or analyzing a complete control loop with a variable frequency power source. The computer program which is described calculates both the transient and steady-state performance of the machine from its equivalent circuit constants. The principal element in the program is a differential equation solving algorithm using a predictor-corrector method. This predictor-corrector technique is relatively easy to program and is suitable for use with a medium size digital computer. A discussion of the various steps in the program as well as an example of an application of the program are given.
The role of the common cytokine receptor gamma-chain in regulating IL-2-dependent, activation-induced CD8+ T cell death. (1999)

IL-2-dependent, activation-induced T cell death (AICD) plays an important role in peripheral tolerance. Using CD8+ TCR-transgenic lymphocytes (2C), we investigated the mechanisms by which IL-2 prepares CD8+ T cells for AICD. We found that both Fas and TNFR death pathways mediate the AICD of 2C cells. Neutralizing IL-2, IL-2R alpha, or IL-2R beta inhibited AICD. In contrast, blocking the common cytokine receptor gamma-chain (gamma c) prevented Bcl-2 induction and augmented AICD. IL-2 up-regulated Fas ligand (FasL) and down-regulated gamma c expression on activated 2C cells in vitro and in vivo. Adult IL-2 gene-knockout mice displayed exaggerated gamma c expression on their CD8+, but not on their CD4+, T cells. IL-4, IL-7, and IL-15, which do not promote AICD, did not influence FasL or gamma c expression. These data provide evidence that IL-2 prepares CD8+ T lymphocytes for AICD by at least two mechanisms: 1) by up-regulating a pro-apoptotic molecule, FasL, and 2) by down-regulating a survival molecule, gamma c.
The LittleDog robot (2010)

LittleDog is a small four-legged robot designed for research on legged locomotion. The LittleDog platform was designed by Boston Dynamics with funding from DARPA to enable rapid advances in the state of the art of rough-terrain locomotion algorithms. In addition to providing a fleet of 12 robots with baseline software and development tools, LittleDog served as a cross-team common platform that allowed direct comparison of results across multiple research teams. Here we report the details of this robotic system.
Applying Statistical Design of Experiments To Understanding the Effect of Growth Medium Components on Cupriavidus necator H16 Growth (2020)

<i>Cupriavidus necator</i> H16 is gaining significant attention as a microbial chassis for range of biotechnological applications. While the bacterium is a major producer of bioplastics, its lithoautotrophic and versatile metabolic capabilities make the bacterium a promising microbial chassis for biofuels and chemicals using renewable resources. It remains necessary to develop appropriate experimental resources to permit controlled bioengineering and system optimization of this microbe. In this study, we employed statistical design of experiments to gain understanding of the impact of components of defined media on <i>C. necator</i> growth and built a model that can predict the bacterium's cell density based on medium components. This highlighted medium components, and interaction between components, having the most effect on growth: fructose, amino acids, trace elements, CaCl<sub>2</sub>, and Na<sub>2</sub>HPO<sub>4</sub> contributed significantly to growth (<i>t</i> values of <-1.65 or >1.65); copper and histidine were found to interact and must be balanced for robust growth. Our model was experimentally validated and found to correlate well (<i>r</i><sup>2</sup> = 0.85). Model validation at large culture scales showed correlations between our model-predicted growth ranks and experimentally determined ranks at 100 ml in shake flasks (ρ = 0.87) and 1 liter in a bioreactor (ρ = 0.90). Our approach provides valuable and quantifiable insights on the impact of medium components on cell growth and can be applied to model other <i>C. necator</i> responses that are crucial for its deployment as a microbial chassis. This approach can be extended to other nonmodel microbes of medical and industrial biotechnological importance.<b>IMPORTANCE</b> Chemically defined media (CDM) for cultivation of <i>C. necator</i> vary in components and compositions. This lack of consensus makes it difficult to optimize new processes for the bacterium. This study employed statistical design of experiments (DOE) to understand how basic components of defined media affect <i>C. necator</i> growth. Our growth model predicts that <i>C. necator</i> can be cultivated to high cell density with components held at low concentrations, arguing that CDM for large-scale cultivation of the bacterium for industrial purposes will be economically competitive. Although existing CDM for the bacterium are without amino acids, addition of a few amino acids to growth medium shortened lag phase of growth. The interactions highlighted by our growth model show how factors can interact with each other during a process to positively or negatively affect process output. This approach is efficient, relying on few well-structured experimental runs to gain maximum information on a biological process, growth.
PERFORMANCE AND EMISSION CHARACTERISTICS OF A DIESEL ENGINE WITH COTTONSEED OIL PLUS DIESEL OIL BLENDS (2005)

aIn the present study a 4-stroke 5hp diesel engine was tested with Diesel oil plus cottonseed oil blends. The blends in different proportions (10 to 50 percent by volume) were tested at constant speed of 1500 rpm. The said engine is operated at different loads and characteristics like Brake power, Brake thermal efficiency, specific fuel consumption etc. Engine performance for blends resulted in lower brake thermal efficiency. Smoke is also found to increase with the blends. The results of the present experimental investigations reveal that the performance of the blends is comparable with that of diesel. Hence blends can profitably be employed in an existing CI engine without major engine modifications, further it can be an immediate solution for the development of rural areas, and for the emergency use in the event of severe diesel fuel shortage.
Heat-sensitive materials for uncooled microbolometer arrays (2001)

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 V. Yu. Zerov and V. G. Malyarov , "Heat-sensitive materials for uncooled microbolometer arrays," J. Opt. Technol. 68, 939- (2001) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Microwave dielectric properties of doped-MgTiO/sub 3/ ceramics (2002)

Microwave dielectric resonator materials based on MgTiO/sub 3/-CaTiO/sub 3/ (MCT) ceramic are studied. The effect of donor and acceptor impurity addition on sintering behavior, microstructure, and microwave dielectric properties is discussed in some detail. The effect of sintering aid addition is also described.