gebhart/patrepeval huggingface dataset:
Thermosensitive and ampholytic hydrogels for salt solution (2003)

Abstract A series of N ‐isopropylacrylamide/[[3‐(methacryloylamino)propyl]dimethy(3‐sulfopropyl)ammonium hydroxide] (NIPAAm/MPSA) copolymer hydrogels were prepared with various compositions. Swelling of the hydrogels in water, aqueous NaCl, KCl, CaCl 2 , and MgCl 2 solutions was studied. NIPAAm/MPSA hydrogels have a higher degree of swelling in water and salt solutions than that of poly( N ‐isopropylacrylamide) (PNIPAAm). Also, NIPAAm/MPSA hydrogels are more salt resistant when deswelling in salt solutions. For <7 mol % MPSA, the formed hydrogels retain both temperature reversibility and high swelling. A higher content of MPSA (>11 mol %) leads to better salt resistance but a decrease in thermosensitivity. The swelling of NIPAAm/MPSA hydrogel in 0.05 M NaCl is non‐Fickian. In NaCl and KCl aqueous solutions, the zwitterionic hydrogels do not show obvious antipolyelectrolyte swelling behavior, whereas in divalent salt CaCl 2 and MgCl 2 solutions, the swelling ability of NIPAAm/MPSA hydrogels is enhanced at low salt concentration, then decreases with further increase in salt concentration. The lower critical solution temperatures of NIPAAm/MPSA hydrogels are also affected by concentrated salt solution. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 2032–2037, 2003
High Concentration and Stable Aqueous Dispersion of Graphene Stabilized by a New Amphiphilic Copolymer (2015)

In this study, the new amphiphilic copolymer of sodium-4-styrenesulfonate (SS) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) [poly(SS-co-AMPS)] was prepared and first used as an effective stabilizer to prepare a high concentration and stable aqueous dispersion of graphene. It was found that the high concentration of the stable graphene dispersion can reach up to 12.0 mg/mL using the copolymer as a stabilizer. FT-IR and UV-Vis study show that owing to the coexistence of π-π interaction, hydrophobic attraction, and hydrogen bonding, the poly(SS-co-AMPS) exhibits a high adsorptivity for graphene sheets. In addition, the electrostatic repulsions and stereo-hindrance effect supplied by the sulfonic groups (-SO3−) and the side chain can prevent the π-π stacking of graphene sheets effectively. The morphology of the exfoliated graphene sheets was investigated by atomic force microscopy and transmission electron microscopy with a 3.9-nm average thickness. Furthermore, this polymer-functionalized graphene can also be dispersed very well in polar organic solvents, such as N,N-dimethylmethanamide, acetone, and ethanol, to form stable homogeneous suspensions.
Linearisation of RF multicarrier amplifiers usingCartesian feedback (1994)

A linearised multicarrier RF power amplifier using multiple Cartesian feedback loops is described. Measurements on a four-channel system with a class AB power amplifier at 880 MHz showed that the intermodulation products were suppressed by 30 dB.
Medical Police (1988)

Defoe neither originated nor exhausted the metaphor of circulation. In 1651, it had enabled Thomas Hobbes to conceive money as the lifeblood of the commonwealth: By the means of which measures, all commodities, movable and immovable, are made to accompany a man to all places of his resort, within and without the place of his ordinary residence; and the same passeth from man to man, within the commonwealth; and goes round about, nourishing, as it passeth, every part thereof; in so much as this concoction, is as it were the sanguification of the commonwealth: for natural blood is in like manner made of the fruits of the earth; and circulating, nourisheth by the way every member of the body of man. KeywordsMedical PoliceInvisible HandParish SchoolSocial BodyVisible HandThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
A comparison between single dose of 50 microg oral misoprostol and 25 microg vaginal misoprostol for labor induction. (2005)

A single dose of 25 microg vaginal misoprostol appears to be more effective than 50 microg oral dose in improving Bishop scores and decreasing the time to vaginal delivery in women with unfavorable cervix without severe adverse effects.
ATP Binding and ATPase Activities Associated with Recombinant Rabbit Hemorrhagic Disease Virus 2C-Like Polypeptide (2000)

The carboxy-terminal region of the rabbit hemorrhagic disease virus p37 polyprotein cleavage product has been expressed in Escherichia coli as a glutathione S-transferase (GST) fusion protein. The recombinant GST-Delta2C protein showed in vitro ATP-binding and ATPase activities. Site-directed mutagenesis studies of the conserved residues G(522) and T(529) in motif A, D(566) and E(567) in motif B, and K(600) in motif C were also performed. These results provide the first experimental characterization of a 2C-like ATPase activity in a member of the Caliciviridae.
Dry SO/sub 2/-particulate removal for coal-fired boilers. Volume 1. Demonstration of SO/sub 2/ removal on a 22-MW coal-fired utility boiler by dry injection of nahcolite. Final report (1983)

A full scale demonstration of the dry removal of SO/sub 2/ with nahcolite (naturally occurring sodium bicarbonate) was conducted at Public Service Company of Colorado's Cameo Unit No. 1. This is a 22 MW coal-fired boiler retrofitted with a fabric filter. In the dry SO/sub 2/ removal process nahcolite is pulverized and injected into the flue gas stream ahead of the fabric filter and downstream of the air preheater. The nahcolite collects on the bags and the SO/sub 2/ is removed as the flue gas passes through the filter cake. The objectives of the program were (1) to demonstrate the operability of the injection technique and the level of SO/sub 2/ removal attainable on a full scale utility system under typical operating conditions, and (2) to assess the impact of nahcolite injection on the operation of the fabric filter. The test program demonstrated SO/sub 2/ removals in the range of 75 to 83 percent with the injection of a stoichiometric amount of nahcolite into the flue gas. The rate of reaction between nahcolite and SO/sub 2/ was decreased when baghouse temperature was reduced from 300/sup 0/F to 275/sup 0/F. This effect lessened the average SO/sub 2/ removal to nearly 40more » percent when injecting near stoichiometric amounts. In addition to SO/sub 2/ removal, the dry injection of nahcolite also resulted in a simultaneous removal of nitric oxide on the order of 8 percent to 14 percent. Nahcolite injection had no substantial impact on the fabric filter operation. The rate of change in flange-to-flange pressure drop during filtration increased by about 0.1 inch H/sub 2/O/h (20 percent) due to nahcolite injection. A second phase of testing is currently planned at the Cameo facility to address the effectiveness of other sodium-based materials as dry SO/sub 2/ scrubbing agents including trona and soda ash. 28 figures, 16 tables.« less
Effects of several Chinese herbal aqueous extracts on human sperm motility in vitro (2004)

The effects of six kinds of aqueous extracts of Chinese herbal medicine (Astragalus membranaceus, Acanthopanacis senticosi, Panax genseng and Ophiopogon japonicus, P. genseng and Aconitum carmichaeli, Salviae miltiorrhiae, Polyporus umbellatus polysaccharide) on sperm motility characteristics of 30 infertile male volunteers were studied in vitro with a computer-assisted sperm analysis at 15, 60 and 180 min after incubated with the drugs. The results showed that per cent viability, number of progressive motile spermatozoa, curvilinear velocity, average path velocity and amplitude of lateral head displacement were significantly enhanced by A. membranaceus (P < 0.05 or < 0.01), per cent viability, average path velocity and amplitude of lateral head displacement were significantly enhanced by A. senticosi (P < 0.05), but all the above were not affected by P. genseng and O. japonicus, P. genseng and A. carmichaeli, S. miltiorrhiae and P. umbellatus polysaccharide. It is suggested that A. membranaceus and A. senticosi can enhance the motility of human spermatozoa in vitro.
Simultaneous Localization of Multiple Sound Sources using Blind Adaptive MIMO Filtering (2006)

Blind adaptive filtering for time delay of arrival (TDOA) estimation is a very powerful method for acoustic source localization in reverberant environments with broadband signals like speech. Based on a recently presented generic framework for blind signal processing for convolutive mixtures, called TRINICON, we present a TDOA estimation method for simultaneous multidimensional localization of multiple sources. Moreover, an interesting link to the known single-input multiple-output (SIMO)-based adaptive eigenvalue decomposition (AED) method is shown. We evaluate the novel multiple-input multiple-output (MIMO)-based approach and compare it with the known SIMO-based method in a reverberant acoustic environment using reference data of the positions obtained from infrared sensors. The results show that the new approach is very robust against reverberation and background noise.
Iloprost infusion decreases skeletal muscle ischemia-reperfusion injury (1990)

Iloprost (a long-acting prostacyclin analog) has been demonstrated to decrease cardiac muscle infarct size after ischemia-reperfusion injury. We investigated the ability of iloprost to decrease skeletal muscle injury and platelet sequestration after ischemia-reperfusion injury in a canine bilateral isolated gracilis muscle model. Anesthesized animals (n = 13) were subjected to 6 hours of gracilis muscle ischemia and 1 hour of reperfusion. Fifteen minutes before muscle reperfusion, the animals were infused with radium 111-labeled autogenous platelets. Experimental animals (n = 7) received a continuous preischemic intravenous infusion of iloprost (0.45 microgram/kg/hr) and two 0.45 microgram/kg intravenous injections of iloprost (10 minutes before the ischemic interval and 10 minutes before reperfusion). Muscle injury was measured with triphenyltetrazolium chloride histochemical staining. Platelet sequestration within ischemic muscle specimens was determined by measuring indium 111 activity in a gamma counter. Iloprost infusion decreased muscle infarct size from 57.0% +/- 12.6% in control animals to 15.8% +/- 4.4% in experimental animals (p less than 0.05). Platelet uptake in experimental and control muscle was 1.2 +/- 0.21 x 10(7) and 2.17 +/- 0.48 x 10(7) platelets/gm ischemic muscle, respectively (p = 0.1). Although platelet sequestration was not altered significantly in this experiment, a reduction in skeletal muscle injury was confirmed. Further investigation on the mechanisms of action of iloprost in chronic and acute skeletal muscle ischemia is warranted.
Measuring microlymphatic flow using fast video microscopy (2005)

Despite advances in the measurement of lymphatic function, little is known about the actual velocities of flow in microlymphatic ( approximately 100 mum diam) vessels. In this work, video microscopy and particle tracking methods are adapted and integrated with an ultra-high-speed imaging camera to obtain measurements of lymph velocities throughout the entire lymphatic contraction cycle in the ratmesentery, something that previous systems were incapable of measuring. To determine the system's accuracy, calibration experiments are conducted across the hypothesized physiologically significant range of velocities for microlymphatic flow (up to 15 mmsec). The system shows high accuracy, less than 2% error, when comparing actual with measured velocities. Microspheres flowing through 140-mum-diam tubing are imaged to demonstrate the system's ability to determine flow rates in these small vessels by measuring particle velocities. To demonstrate biological applicability, mesenteric microlymphatics in loops of the small intestine of three male Sprague-Dawley rats are exteriorized and imaged with the high-speed system at a rate of 500 framessec for several contraction sequences. Lymph velocity fluctuates cyclically with the vessel wall contractions, ranging from -1 to 7 mmsec. These rates are higher than would be possible with standard video microscopy (3.75 mmsec maximum).
Surface Energy Modification by Spin-Cast, Large-Area Graphene Film for Block Copolymer Lithography (2010)

We demonstrate a surface energy modification method exploiting graphene film. Spin-cast, atomic layer thick, large-area reduced graphene film successfully played the role of surface energy modifier for arbitrary surfaces. The degree of reduction enabled the tuning of the surface energy. Sufficiently reduced graphene served as a neutral surface modifier to induce surface perpendicular lamellae or cylinders in a block copolymer nanotemplate. Our approach integrating large-area graphene film preparation with block copolymer lithography is potentially advantageous in creating semiconducting graphene nanoribbons and nanoporous graphene.
Ultrastructural investigation of crystal deposits in Npt2a knockout mice: Are they similar to human Randall's plaques? (2011)

Purpose: Idiopathic Ca oxalate stones may develop with attachment to renal interstitial Ca phosphate deposits (Randall's plaques). Sodium phosphate cotransporter (Npt2a) null mice have hypercalciuria and hyperphosphaturia, and produce tubular and interstitial Ca phosphate deposits. To determine whether this mouse is suitable for Randall's plaque investigations we chronologically studied Ca phosphate deposit sites, structure and composition.Materials and Methods: The kidneys of Npt2a null mice 2 days to 1 year old were examined by light, scanning and transmission electron microscopy. Electron diffraction and energy dispersive x-ray microanalyses were done to determine mineral composition.Results: Poorly crystalline, biological apatite deposits were seen in collecting duct lumina. Deposits consisted of aggregates approximately 5 μm in diameter appearing as microspheres of concentrically organized needle or plate-like, matrix rich crystals. Epithelium/crystal interfaces were filled with membrane bound vesicl...
Optimisation of a Gas Stripping Concentration Technique for Trace Organic Water Pollutants (1980)

Abstract The application of gas stripping for the concentration prior to analysis of organic water pollutants at the parts per million and parts per billion level has been studied. Solutes are stripped from solution by a stream of inert gas and subsequently adsorbed onto active carbon from which surface they are taken up in a solvent for analysis. The method is shown to be applicable to the analysis of a wide range of compounds including pesticides and polychlorinated biphenyls. The effect of gas flowrate, the time of stripping, adsorbent particle size, and desorbing solvent on the percentage recovery of a range of organic compounds has been measured. Problems of contamination of aqueous solutions by absorption of atmospheric vapours prior to analysis are considered, and the analysis of a typical water sample is demonstrated.
Event-driven Simulation and modeling of phase noise of an RF oscillator (2005)

A novel simulation technique that uses an event-driven VHDL simulator to model phase noise behavior of an RF oscillator for wireless applications is proposed and demonstrated. The technique is well suited to investigate complex interactions in large system-on-chip systems, where traditional RF and analog simulation tools do not work effectively. The oscillator phase noise characteristic comprising of flat electronic noise, as well as, upconverted thermal and 1/f noise regions are described using time-domain equations and simulated as either accumulative or nonaccumulative random perturbations of the fundamental oscillator period. The VHDL simulation environment was selected for its high simulation speed, the direct correlation between the simulated and built circuits and its ability to model mixed-signal systems of high complexity. The presented simulation technique has been successfully applied and validated in a Bluetooth transceiver integrated circuit fabricated in a digital 130-nm process.
Report on Journal of Association of Official Agricultural Chemists (1917)

Journal Article Report on Journal of Association of Official Agricultural Chemists Get access C L Alsberg C L Alsberg Chairman,Board of Editors Bureau of Chemistry, Washington, D. C Search for other works by this author on: Oxford Academic Google Scholar Journal of Association of Official Agricultural Chemists, Volume 3, Issue 1, 15 May 1917, Pages 55–59, https://doi.org/10.1093/jaoac/3.1.55 Published: 10 March 2020
Characteristics and distribution of receptors for [d‐trp<sup>6</sup>]‐ luteinizing hormone‐releasing hormone, somatostatin, epidermal growth factor, and sex steroids in 500 biopsy samples of human breast cancer (1989)

Binding capacities and apparent dissociation constants of receptors for [D-Trp6]-luteinizing hormone-releasing hormone [( D-Trp6]-LH-RH), somatostatin (SS-14), epidermal growth factor (EGF), and estrogen and progesterone were determined in 500 breast cancer specimens using multipoint assays. Specific binding sites greater than 10 fmol/mg cytosol protein for estrogen were found in 408 carcinomas (81.6%), and for progesterone in 340 specimens (68%). High affinity EGF receptors were present in membrane preparations from 335 samples (67%). In 260 of 500 samples (52%), two classes of [D-Trp6]-LH-RH membrane receptor sites were also detected, one class showing high affinity and low capacity, and the other class showing low affinity and high capacity; 178 biopsy samples (35.6%) exhibited binding sites for SS-14. Statistically significant inverse correlations were found between the binding capacities of estrogen and EGF receptors as well as between Bmax of progesterone and EGF receptors. Significant positive correlations were demonstrated between binding capacities of estrogen and progesterone and between Bmax of high affinity and low affinity binding sites of [D-Trp6]-LH-RH receptors. However, no correlation was found between the dissociation constants of different receptor sites in human breast cancer specimens. These results demonstrate that numerous human breast cancers, in addition to receptors for estrogen and progesterone, also show binding sites for EGF, [D-Trp6]-LH-RH and SS-14. The methods described herein permit a routine quantification of receptor sites for [D-Trp6]-LH-RH, SS-14, and EGF in membrane preparations of biopsy samples of breast cancer and can be used in conjunction with the determination of estrogen and progesterone receptors in nuclear-cytosolic extracts. The simultaneous measurements using a microanalytic approach allow the determination of peptide and steroid hormone receptors that might be involved in the response mechanisms of human breast cancer. It should be possible to correlate the levels of these receptors with clinical parameters to better identify endocrine-responsive neoplasms. This approach might be useful to guide a rational hormonal therapy in women with breast cancer.
Acute Occupational Exposure to Hydrogen Sulfide (2008)

Occupational exposures to hydrogen sulfide occur in a wide variety of sectors.
Modeling and Experimental Validation of a Volumetric Expander Suitable for Waste Heat Recovery from an Automotive Internal Combustion Engine Using an Organic Rankine Cycle with Ethanol (2016)

Waste heat recovery (WHR) in exhaust gas flow of automotive engines has proved to be a useful path to increase the overall efficiency of internal combustion engines (ICE). Recovery potentials of up to 7% are shown in several works in the literature. However, most of them are theoretical estimations. Some present results from prototypes fed by steady flows generated in an auxiliary gas tank and not with actual engine exhaust gases. This paper deals with the modeling and experimental validation of an organic Rankine cycle (ORC) with a swash-plate expander integrated in a 2 L turbocharged petrol engine using ethanol as working fluid. A global simulation model of the ORC was developed with a maximum difference of 5%, validated with experimental results. Considering the swash-plate as the main limiting factor, an additional specific submodel was implemented to model the physical phenomena in this element. This model allows simulating the fluid dynamic behavior of the swash-plate expander using a 0D model (Amesim). Differences up to 10.5% between tests and model results were found.
Interictal, circulating sphingolipids in women with episodic migraine (2015)

This study provides Class III evidence that serum sphingolipid panels accurately distinguish women with migraine from women without migraine.
Adenoviral transduction of mouse hematopoietic stem cells (2003)

Hematopoietic stem cells (HSC) are quiescent, self-renewing cells that can give rise to all blood cell lineages. HSC are an attractive target for gene therapy, due to their differentiation capacity and the number of diseases that result from abnormal HSC function. While human HSC have been shown to be transduced with adenoviral vectors, the adenoviral transduction of mouse HSC has not been extensively studied. We show here that a population of mouse bone marrow highly enriched for HSC (called side population, or SP, cells) can be transduced with adenovirus type 5 (Ad5) at a low multiplicity of infection. Transduced SP cells showed normal in vitro myeloid differentiation potential compared to mock-transduced SP cells. Transduced SP cells retained substantial but reduced in vivo long-term repopulating activity and contributed to all blood cell lineages. Ad5 transduction of mouse SP cells was dependent on coxsackie and adenovirus receptor (CAR), as an anti-CAR blocking antibody greatly reduced transduction. Therefore, adenoviral transduction of mouse HSC can be achieved without ablation of the hematopoietic repopulating activity.
IEE - A New Type of X-Ray Photoelectron Spectrometer (1969)

A new type of x-ray photoelectron spectrometer has been designed. Although smaller in size, the new instrument shows a considerable improvement in sensitivity compared to other photoelectron spectrometers. This has been achieved through the provision of several new features: The photoelectrons are retarded to low energy (10 eV through 100 eV) before entering the deflecting energy analyzer. A spherical electrostatic analyzer in figure of rotation is used. Annular slits at both source and detector provide a large effective source area. The instrument is shielded against external magnetic fields (earth magnetic field and a.c. fields) by a double layer of mu-metal, thus avoiding the installation of large Helmholtz coils.
Impaired Neuronal Insulin Signaling Precedes Aβ42 Accumulation in Female AβPPsw/PS1ΔE9 Mice (2012)

Reduced glucose utilization is likely to precede the onset of cognitive deficits in Alzheimer's disease (AD). Similar aberrant glucose metabolism can also be detected in the brain of several AD mouse models. Although the cause of this metabolic defect is not well understood, it could be related to impaired insulin signaling that is increasingly being reported in AD brain. However, the temporal relationship between insulin impairment and amyloid-β (Aβ) biogenesis is unclear. In this study using female AβPPsw/PS1ΔE9 mice, we found that the level of Aβ40 was fairly constant in 6- to 15-month-old brains, whereas Aβ42 was only significantly increased in the 15-month-old brain. In contrast, increased levels of IRβ, IGF-1R, IRS1, and IRS-2, along with reduced glucose and insulin content, were detected earlier in the 12-month-old brains of AβPPsw/PS1ΔE9 mice. The reduction in brain glucose content was accompanied by increased GLUT3 and GLUT4 levels. Importantly, these changes precede the significant upregulation of Aβ42 level in the 15-month-old brain. Interestingly, reduction in the p85 subunit of PI3K was only apparent in the 15-month-old AβPPsw/PS1ΔE9 mouse brain. Furthermore, the expression profile of IRβ, IRS-2, and p85/PI3K in AβPPsw/PS1ΔE9 was distinct in wild-type mice of a similar age. Although the exact mechanisms underlining this connection remain unclear, our results suggest a possible early role for insulin signaling impairment leading to amyloid accumulation in AβPPsw/PS1ΔE9 mice.