gebhart/patrepeval huggingface dataset:
Syntheses of 4<i>‘</i><i>-</i><i>C</i>-Ethynyl-β-<scp>d</scp>-<i>arabino- </i>and 4‘-<i>C-</i>Ethynyl-2<i>‘</i>-deoxy-β-<scp>d</scp>-<i>ribo-</i>pentofuranosylpyrimidines and -purines and Evaluation of Their Anti-HIV Activity (2000)

4'-C-Ethynyl-beta-D-arabino- and 4'-C-ethynyl-2'-deoxy-beta-D-ribo-pentofuranosylpyrimidine and -purine nucleosides were synthesized and evaluated for their in vitro anti-HIV activity. The key intermediate, 4-C-ethynyl- or 4-C-triethylsilylethynyl-D-ribo-pentofuranose, was prepared from D-glucose and glycosidated with various pyrimidine or purine bases. The arabinopyrimidine derivatives were prepared from the corresponding ribo derivatives via O(2),2'-anhydro nucleosides. The 2'-deoxy-ribo derivatives were synthesized by radical reduction of 2'-bromo or 2'- phenoxythiocarbonyloxy nucleosides. Among these 4'-C-ethynyl nucleosides, seven analogues proved to be potent against HIV-1 in vitro with EC(50) values ranging from 0.0003 to 0. 03 microM. These compounds also exerted activity against clinical and multi-dideoxy-nucleoside-resistant HIV-1 strains with comparable EC(50) values. Three such 4'-C-ethynyl-2'-deoxypurine analogues including 4'-C-ethynyl-2'-deoxyadenosine and 4'-C-ethynyl-2, 6-diamino-2'-deoxypurine were less cytotoxic [selectivity indices (SIs): 975-2733] than three 4'-C-ethynyl-2'-deoxycytidine analogues (SIs: 63-363). 4'-C-Ethynyl-5-fluoro-2'-deoxycytidine was least toxic (SI: >3333) and potent against all HIV strains tested.
Use of Cetylpyridinium Chloride in the Decontamination of Water for Culture of Mycobacteria (1978)

Selective decontamination of large-volume aqueous samples for mycobacterial culture can be achieved with overnight exposure to 0.04% cetylpyridinium chloride.
Aircraft Automatic Approach and Landing Using GPS (1996)

M OST conventional aircraft automatic landing systems use the instrument or microwave landing systems (ILS or MLS) in their terminal approach phases. These systems supply the autopilot with the aircraft's angular deviation from a desired flight path, which essentially corresponds to the measurement of vertical and lateral positions. Basic ILS can only satisfy the FAA's nonprecision and Category I landing requirements; and aircraft using the MLS or an improved ILS system can land with Category III required accuracy. In these autopilots, velocity is typically calculated by filtering and differentiating position, or by integrating the acceleration outputs of an Inertial Measurement Unit. Some disadvantages of these integrated systems include their high user costs and dependence on expensive ground equipment. Also, the noisy ILS and MLS signals are typically processed with a smoothing filter. This causes lags that must be compensated for by the landing autopilot. Unlike most other navigation aids, a GPS receiver directly measures threedimensional velocity with extreme accuracy (for DGPS and CDGPS,^ better than 5 cm/s). For the autopilot designer, this is of great value. A direct measurement of true ground speed not only assists in normal landings, it gives important advanced knowledge of wind gusts and shears. In addition to velocity, a single, state-of-the-art, GPS receiver can provide accurate three-dimensional position
Limiting Initial Resuscitation of Uncontrolled Hemorrhage Reduces Internal Bleeding and Subsequent Volume Requirements (1995)

We tested the hypothesis that full or "standard resuscitation" (SR) with lactated Ringer's solution (LRS) results in increased bleeding in uncontrolled hemorrhagic shock, compared with a "limited prehospital resuscitation" (LPR) regimen and a control group of "no resuscitation" (NR). Cardiac output was used as physiological endpoint for resuscitation. Twenty swine had 25 mL/kg of blood withdrawn during a 30-minute controlled hemorrhage, followed by a 20-minute "prehospital" resuscitation regimen was conducted in three groups: the SR group (n = 6), LRS infused as needed to restore cardiac index (CI) to 100% baseline; the LPR group (n = 8), with resuscitation using LRS to 60% of baseline CI, with volume limited to 10 mL/kg; and the NR group (n = 6). After aortotomy repair, intraoperative resuscitation was continued for 120 minutes using LRS to achieve and maintain 80% of baseline mean arterial pressure. Blood pressure and cardiac index were greatly reduced, to 34% and 39% of baseline, respectively, by hemorrhage. During prehospital resuscitation, the SR group required 48.8 +/- 6.5 mL/kg of LRS, whereas the LPR group received 9.4 +/- 0.6 mL/kg (p < 0.05). Mean arterial pressure increased in all three groups during prehospital resuscitation (p < 0.05). Pulse pressures increased in the SR and LPR groups only (p < 0.05). The increment in oxygen delivery was significantly greater in the SR group, compared with the LPR group (p < 0.05), which in turn was significantly greater than the NR group (p < 0.05). Peritoneal blood volume was significantly higher in the SR group (20.6 +/- 5.6 mL/kg), versus the LPR (7.3 +/- 1.3 mL/kg; p < 0.05) and NR groups (3.0 +/- 0.9 mL/kg; p < 0.05). Crystalloid and whole blood requirements during the intraoperative resuscitation phase were significantly higher in the SR group (193 +/- 16.0 and 9.0 +/- 2.5 mL/kg), than in LPR (111.8 +/- 15.6 and 4.5 +/- 1.8 mL/kg; p < 0.05) and NR groups (128.5 +/- 32.3 and 3.9 +/- 2.3 mL/kg; p < 0.05). In the presence of uncontrolled hemorrhagic shock, LPR and NR can significantly reduce internal hemorrhage and subsequent intraoperative crystalloid and blood requirements.
Seedless, silver-induced synthesis of star-shaped gold/silver bimetallic nanoparticles as high efficiency photothermal therapy reagent (2011)

This work demonstrates a simple method for synthesizing a shape-controllable bimetallic gold/silver nanostructured material. Spiky star-shaped gold/silver nanoparticles are obtained by mixing HAuCl4, AgNO3 and ascorbic acid with shaking for 20 s. The wide range of star shapes and irregular quasi-spherical nanoparticles is tailored by tuning the ratio of metal precursors. The wavelengths absorbed by the nanoparticles can be tuned from visible light to near infrared by controlling their shape. To maintain the morphology of the nanoparticles, enhance their thermal stability and support their application in biological systems, modified chitosan was utilized for the properties and to keep the material well dispersed in solution in deionized water. The moderate concentration of modified chitosan capped bimetallic star-shaped nanoparticles not only ensured non-toxicity to normal cells and cancer cells, but also promoted high efficiency photothermal ablation of cancer cells. Ultimately, this nanotechnology-driven assay has huge potential for application in rapid synthesis, tunable absorption and non-cytotoxic photothermal therapy for the effective treatment of cancer.
Comparison of the Distribution of IgG and IgA Antibodies in Serum and Various Mucosal Fluids of HIV Type 1-Infected Subjects (1999)

We compared IgG and IgA distribution in serum, three different salivary samples, two different rectal secretion samples, cervicovaginal secretions, and seminal secretions from asymptomatic CDC stage II/III HIV-1-infected subjects (n = 44) and from HIV-1-seronegative volunteers (n = 52). In-house ELISAs were used to measure total IgG and total IgA levels, as well as HIV-specific anti-gp120 MN and anti-p24 LAI IgG and IgA. Human serum albumin was titrated in parallel to calculate the relative coefficient of excretion (RCE). In spite of substantial interindividual variability, total IgG concentrations in all fluids were found to be significantly greater in the HIV-1-infected group than in the seronegative subjects. Calculation of RCE values revealed three different types of mucosal secretion: secretions with no local Ig production, such as sperm; secretions with local production of IgA and transudative origin of IgG, such as salivary and rectal samples; and secretions with local production of both IgG and IgA, such as in cervicovaginal secretions. For all mucosal specimens from HIV-1-infected subjects, the response to HIV-1 was predominantly IgG, with highest titers observed in cervicovaginal secretions (although these were lower than serum levels). In contrast, the specific IgA response appeared weaker in the mucosa than in serum.
BIC Defacing Algorithm (2018)

Abstract Public distribution of imaging information from several MRI data processing projects at the BIC has lead to the development of this DEFACING algorithm that is used as part of anonymisation process. Key features of the algorithm include: the defacing should modify voxels associated with face of the subject, making a rendering of the face unrecognisable, it should work on data in the native scanner space and it should not significantly affect subsequent data processing outcome (model based registration, brain extraction, brain tissue classification and brain segmentation). The algorithm is implemented using the MINC library and source code is publicly available. The effect of the defacing algorithm on the data processing was verified using the ICBM database of 152 scans of young adults.
Cell-cell adhesion in human fibroblasts requires calcium signaling (2001)

In connective tissues, intercellular adhesion is essential for tissue morphogenesis, development and wound healing. However, the signaling mechanisms initiated by cell-cell adhesion in fibroblasts and that regulate it are not known. In this study we tested the hypothesis that intracellular calcium signaling is required to mediate intercellular adhesion between fibroblasts. Fura-2 or fluo-3 labeled human fibroblasts were used to investigate calcium homeostasis during intercellular adhesion. After contact with suspended fibroblasts there was a rise in cytosolic free calcium ([Ca2+]i) and multiple calcium oscillations in substrate-attached cells. Antibodies against the extracellular but not the cytoplasmic domain of cadherin induced a similar calcium response, indicating that these responses were initiated by cadherin binding. As shown by the near-plasma membrane Ca2+ indicator (Fura-C18) and by confocal microscopy of fluo-3-loaded cells, [Ca2+]i transients probably originated at sites of cell-cell contact. Cell-cell adhesion was dependent on both calcium influx through membrane channels and release of Ca2+ from internal calcium stores, because the calcium channel inhibitor LaCl3 or pretreatment of cells with thapsigargin significantly inhibited (>35%) cell-cell attachment. The [Ca2+]i changes induced by cell-cell adhesion were temporally correlated with increased recruitment of intercellular junctional proteins into the cytoskeleton and movement of GFP-actin to sites of cell-cell contact. [Ca2+]i responses induced by intercellular adhesion were essential for both junctional protein recruitment and the establishment of strong cell-cell contacts, as loading cells with BAPTA/AM significantly inhibited cell-cell adhesion and recruitment of cadherins and beta-catenin to the actin cytoskeleton. Actin depolymerization by cytochalasin D dramatically reduced cell-cell adhesion and recruitment of cadherins and catenin to the actin cytoskeleton. These results demonstrate that cadherin-cadherin interaction induces [Ca2+]i transients during cell-cell adhesion in fibroblasts, and these calcium signals regulate cell-cell adhesion through remodeling of cortical actin and recruitment of cadherins and beta-catenin into intercellular junctions.
Effect of basic fibroblast growth factor on angiogenesis and bone regeneration in non-critical-size bone defects in rat calvaria (2014)

We used microcomputed tomography (micro-CT) to evaluate the effects of basic fibroblast growth factor (FGF-2) contained in absorbable collagen sponges on angiogenesis and bone regeneration in rat calvarial non-critical-size bone defects. Two symmetrical non-critical-size calvarial bone defects (diameter, 2.7 mm) were created in male Fisher rats. An absorbable collagen sponge with or without FGF-2 (0.1% or 0.3%) was implanted into each defect. Blood vessel volume and bone volume were calculated using software. On day 28, blood vessel volume and bone volume were significantly greater in the 0.3% and 0.1% FGF-2 groups than in the control group. FGF-2 concentration-dependently increased blood vessels and bone formation in non-critical-size bone defects in rat calvaria.
Determination of rate constants for turnover of myosin isoforms in rat myocardium: implications for in vivo contractile kinetics (2009)

The ventricles of small mammals express mostly alpha-myosin heavy chain (alpha-MHC), a fast isoform, whereas the ventricles of large mammals, including humans, express approximately 10% alpha-MHC on a predominately beta-MHC (slow isoform) background. In failing human ventricles, the amount of alpha-MHC is dramatically reduced, leading to the hypothesis that even small amounts of alpha-MHC on a predominately beta-MHC background confer significantly higher rates of force development in healthy ventricles. To test this hypothesis, it is necessary to determine the fundamental rate constants of cross-bridge attachment (f(app)) and detachment (g(app)) for myosins composed of 100% alpha-MHC or beta-MHC, which can then be used to calculate twitch time courses for muscles expressing variable ratios of MHC isoforms. In the present study, rat skinned trabeculae expressing either 100% alpha-MHC or 100% beta-MHC were used to measure ATPase activity, isometric force, and the rate constant of force redevelopment (k(tr)) in solutions of varying Ca(2+) concentrations. The rate of ATP utilization was approximately 2.5-fold higher in preparations expressing 100% alpha-MHC compared with those expressing only beta-MHC, whereas k(tr) was 2-fold faster in the alpha-MHC myocardium. From these variables, we calculated f(app) to be approximately threefold higher for alpha-MHC than beta-MHC and g(app) to be twofold higher in alpha-MHC. Mathematical modeling of isometric twitches predicted that small increases in alpha-MHC significantly increased the rate of force development. These results suggest that low-level expression of alpha-MHC has significant effects on contraction kinetics.
Theoretical aspects of the agile mirror (1994)

A Planar Plasma mirror which can be oriented electronically could have the capability of providing electronic steering of a microwave beam in a radar or electronic warfare system. This system is denoted the agile mirror. A recent experiment has demonstrated such a planar plasma and the associated microwave reflection. This plasma was produced by a hollow cathode glow discharge, where the hollow cathode was a grooved metallic trench in a Lucite plate. Various theoretical aspects of this configuration of an agile mirror are examined here.
HYPERKERATOSIS LENTICULARIS PERSTANS (FLEGEL): REPORT OF A CASE IN WHICH THE APPLICATION OF BETAMETHASONE‐17‐VALERATE CREAM CAUSED COMPLETE CLEARING OF THE LESIONS* (1967)

S ummary The distinctive clinical and histological features of an extensive case of hyperkeratosis lenticularis perstans and the rapid and complete response to topical applications of betamethasone‐17‐valerate are recorded. No previous record of effective treatment has been described in the four male cases previously recorded in the literature. A 57 year old female has also been studied with a twenty year old history of an unremitting progressive eruption showing the clinical and histological features of hyperkeratosis lenticularis perstans. In this patient initial response to topical therapy with betamethasone‐17‐valerate is most gratifying, and is the first treatment to influence the signs and symptoms of the disease state.
Gamma Interferon Can Prevent Herpes Simplex Virus Type 1 Reactivation from Latency in Sensory Neurons (2001)

We recently demonstrated that CD8(+) T cells could block herpes simplex virus type 1 (HSV-1) reactivation from latency in ex vivo trigeminal ganglion (TG) cultures without destroying the infected neurons. Here we establish that CD8(+) T-cell prevention of HSV-1 reactivation from latency is mediated at least in part by gamma interferon (IFN-gamma). We demonstrate that IFN-gamma was produced in ex vivo cultures of dissociated latently infected TG by CD8(+) T cells that were present in the TG at the time of excision. Depletion of CD8(+) T cells or neutralization of IFN-gamma significantly enhanced the rate of HSV-1 reactivation from latency in TG cultures. When TG cultures were treated with acyclovir for 4 days to insure uniform latency, supplementation with recombinant IFN-gamma blocked HSV-1 reactivation in 80% of cultures when endogenous CD8(+) T cells were present and significantly reduced and delayed HSV-1 reactivation when CD8(+) T cells or CD45(+) cells were depleted from the TG cultures. The effectiveness of recombinant IFN-gamma in blocking HSV-1 reactivation was lost when its addition to TG cultures was delayed by more than 24 h after acyclovir removal. We propose that when the intrinsic ability of neurons to inhibit HSV-1 gene expression is compromised, HSV-specific CD8(+) T cells are rapidly mobilized to produce IFN-gamma and perhaps other antiviral cytokines that block the viral replication cycle and maintain the viral genome in a latent state.
Electro-optic Imaging Fourier Transform Spectrometer (2005)

An Electro-Optic Imaging Fourier Transform Spectrometer (EOIFTS) for Hyperspectral Imaging is described. The EOIFTS includes an input polarizer, an output polarizer, and a plurality of birefringent phase elements. The relative orientations of the polarizers and birefringent phase elements can be changed mechanically or via a controller, using ferroelectric liquid crystals, to substantially measure the spectral Fourier components of light propagating through the EIOFTS. When achromatic switches are used as an integral part of the birefringent phase elements, the EIOFTS becomes suitable for broadband applications, with over 1 micron infrared bandwidth.
Mastitis and Immunological Factors in Breast Milk of Lactating Women in Malawi (1999)

Although an elevated sodium concentration in human milk is suggested to be an indicator of mastitis, it is unclear whether elevated sodium concentrations are associated with immunological and inflammatory mediators in human milk. We conducted a cross-sectional study to evaluate the relationships between elevated breast milk sodium concentrations and levels of lactoferrin, lysozyme, secretory leukocyte protease inhibitor (SLPI), interleukin-8 (IL-8), and RANTES (regulated on activation normal T cell expressed and secreted) in human milk at 6 weeks postpartum in 96 lactating women in Blantyre, Malawi. Mastitis, as indicated by an elevated breast milk sodium concentration, was present in 15.6% of the women. Women with and without mastitis had respective median levels of other factors as follows: lactoferrin, 1,230 versus 565 mg/liter (P < 0. 0007); lysozyme, 266 versus 274 mg/liter (P = 0.55); SLPI, 76 versus 15 microg/liter, (P < 0.0002); IL-8, 339 versus 25 ng/liter (P < 0. 0001); and RANTES, 82 versus 3 ng/liter (P < 0.0001). Elevated sodium concentrations in breast milk are associated with an increase in levels of some immunological and inflammatory factors in breast milk.
Internal Aortic Annuloplasty: A Novel Technique (2011)

Of the six animals that underwent aortic annuloplasty, there was one early death due to surgical complication. The remaining five subjects were clinically stable at the time of elective sacrifice. Any conclusions regarding the cause of the observed aortic insufficiency are beyond the scope of this feasibility study but would need to be fully evaluated in the preclinical assessment of any internal aortic annuloplasty device. We have shown that we have developed a reproducible surgical technique in a physiologically appropriate model for the preclinical assessment of internal aortic annulus repair devices.
Localization of regional myocardial ischemia by recording of monophasic action potentials. (1984)

Identification of regional myocardial ischemia by TQ-ST segment mapping, while commonly used, is relatively imprecise and nonspecific. In 41 open-chest dogs we examined whether monophasic action potentials (MAPs) recorded from the myocardial surface by means of a new contact-electrode technique could be used to more precisely and specifically index regional myocardial ischemia. After ligation of the left anterior descending coronary artery (LAD), epicardial and endocardial MAPs from the ischemic region demonstrated shortening of plateau duration followed by a progressive loss in amplitude to 48 +/- 8% and in maximum upstroke velocity (dV/dtmax) to 9 +/- 2% of control (n = 7). Regional hyperkalemia produced by intracoronary injection of potassium chloride also resulted in regional decreases in duration, amplitude, and dV/dtmax of the MAP. Similar to previously reported effects on transmembrane action potentials, ischemia- or hyperkalemia-induced loss in MAP amplitude was due to decreases in both diastolic (negative) and systolic (positive) potential and paralleled TQ segment depression and "true" ST segment elevation in unipolar direct current-coupled electrograms recorded from an adjacent site. In eight canine hearts we compared the abilities of MAP recordings and TQ-ST segment measurements in defining a region of myocardial ischemia. Transmural ischemia with a sharp flow border was produced by LAD ligation and distal embolization with dental rubber. One hour later simultaneous MAP and TQ-ST mapping was performed in each dog at 45 to 65 epicardial sites inside and outside the ischemic region. TQ-ST voltage was significantly increased 10 to 20 mm outside the visible cyanotic border, reaching a maximum just inside the border and decreasing progressively toward the center of the ischemic region to values not significantly different from those from sites 10 mm outside the ischemic border. In contrast, MAP amplitude and dV/dtmax were normal up to 5 to 10 mm outside the cyanotic border, decreased sharply across a lateral transition zone of only 8 mm to 8.7 +/- 2.3% and 4.3 +/- 0.9% of control, respectively, at sites 4 to 6 mm inside the border, and were uniformly abnormal across the entire ischemic region. Recordings made 3 hr after LAD ligation revealed an overall decline in the magnitude of TQ-ST, making definition of the ischemic border by TQ-ST even less precise, whereas the differences between MAPs from normal and ischemic myocardium had become even more pronounced than after 1 hr. Thus, unlike TQ-ST segment measurements, MAP recordings uniquely define ischemic and nonischemic sites and more precisely localize the border of an ischemic region.(ABSTRACT TRUNCATED AT 400 WORDS)
Structural and magnetic properties of cobalt nanoparticles encased in siliceous shells (2007)

Stable colloidal dispersions of cobalt nanoparticles were prepared by refluxing toluene solutions of dicobalt octacarbonyl in the presence of poly(dimethylsiloxane-b-(methylvinylsiloxane-co-methyl(2-trimethoxysilethyl)siloxane)) (PDMS-b-(PMVS-co-PMTMS)) dispersion stabilizers. The nanoparticles coated with the polysiloxane copolymer were subsequently heated at 600 or 700 °C with the goal of forming siliceous shells on the cobalt surfaces to protect them from oxidation. The thermolysis processes at 600 and 700 °C produced increases in the cobalt specific saturation magnetizations (σs) from 48 to 141 and 146 emu g−1 of cobalt respectively. The siliceous coatings provided oxidative protection under ambient conditions for long periods. However, mechanically grinding the thermally treated nanoparticles led to decreases in σs upon aging in air. Particle size analyses indicated an increase in average particle size in the materials heated at 600 °C, but the materials that were heated at 700 °C retained their small nanoparticle sizes. Electron diffraction and X-ray diffraction confirmed that the heat-treated cobalt nanoparticles were predominantly in the face-centered cubic phase, while the materials that had not been heated at the elevated temperatures were only weakly crystalline. Hence, the increases in σs from the preheat-treated to the heat-treated materials were attributed to an improvement in particle crystallinity, combined with less oxidation due to partial protection by a siliceous shell.