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How old do I look? Aging appearance and experiences of aging among U.S. adults ages 50-80. Psychol Aging 2024:2024-58254-001. [PMID: 38421758 DOI: 10.1037/pag0000800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Appearance is an indicator of age and life stage, which are linked to socially salient stereotypes and prejudices. Older adults' appearance-related perceptions and behaviors may affect their experiences of aging within broader society, which may in turn influence health. This study examined associations between two measures related to aging appearance-assessment of one's aging appearance relative to same-age peers and investing time or effort to look younger-positive and negative experiences of aging, and health using multivariable regression. Cross-sectional data were from a nationally representative sample of 2006 U.S. adults ages 50-80 (Mage = 63, 52% women, 71% White) who completed Wave 6 of the National Poll on Healthy Aging in 2019. The majority (59%) reported appearing relatively younger than peers, while fewer reported appearing the same age (35%) or older (6%). About a third (35%) reported investing in looking younger. Appearing relatively younger was associated with more positive (p < .001) and less negative experiences of aging (p = .019). Appearing relatively older showed the opposite relationships (p values < .001). Investing in looking younger was associated with more positive and more negative experiences of aging (p values < .001). Few sociodemographic variations were detected. More positive and less negative experiences of aging were associated with better physical and mental health (p values < .001). While aging appearance is often the basis for jokes, it may affect the quality of older adults' experiences of aging and associated health outcomes. Nuanced findings caution against framing youthful biases in aging appearance and investments in looking younger as solely negative (or positive). (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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Abstract
Resolving the timing of crustal processes and meteorite impact events is central to understanding the formation, evolution and habitability of planetary bodies. However, identifying multi-stage events from complex planetary materials is highly challenging at the length scales of current isotopic techniques. Here we show that accurate U-Pb isotopic analysis of nanoscale domains of baddeleyite can be achieved by atom probe tomography. Within individual crystals of highly shocked baddeleyite from the Sudbury impact structure, three discrete nanostructural domains have been isolated yielding average 206Pb/238U ages of 2,436±94 Ma (protolith crystallization) from homogenous-Fe domains, 1,852±45 Ma (impact) from clustered-Fe domains and 1,412±56 Ma (tectonic metamorphism) from planar and subgrain boundary structures. Baddeleyite is a common phase in terrestrial, Martian, Lunar and asteroidal materials, meaning this atomic-scale approach holds great potential in establishing a more accurate chronology of the formation and evolution of planetary crusts. Constraining the timing of crustal processes and impact events remains challenging. Here, the authors show that atom probe tomography can produce highly accurate U-Pb isotopic age constraints in baddeleyite crystals, which is a common phase in terrestrial, Martian, Lunar and asteroidal materials.
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On the roles of graphene oxide doping for enhanced supercurrent in MgB2 based superconductors. NANOSCALE 2014; 6:6166-6172. [PMID: 24793305 DOI: 10.1039/c4nr00415a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Due to their graphene-like properties after oxygen reduction, incorporation of graphene oxide (GO) sheets into correlated-electron materials offers a new pathway for tailoring their properties. Fabricating GO nanocomposites with polycrystalline MgB2 superconductors leads to an order of magnitude enhancement of the supercurrent at 5 K/8 T and 20 K/4 T. Herein, we introduce a novel experimental approach to overcome the formidable challenge of performing quantitative microscopy and microanalysis of such composites, so as to unveil how GO doping influences the structure and hence the material properties. Atom probe microscopy and electron microscopy were used to directly image the GO within the MgB2, and we combined these data with computational simulations to derive the property-enhancing mechanisms. Our results reveal synergetic effects of GO, namely, via localized atomic (carbon and oxygen) doping as well as texturing of the crystals, which provide both inter- and intra-granular flux pinning. This study opens up new insights into how low-dimensional nanostructures can be integrated into composites to modify the overall properties, using a methodology amenable to a wide range of applications.
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Focused ion beam fabrication of solidified ferritin into nanoscale volumes for compositional analysis using atom probe tomography. J Microsc 2013; 247:288-99. [PMID: 22906016 DOI: 10.1111/j.1365-2818.2012.03644.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The purpose of this investigation was to conduct atom probe tomography (APT) analyses on ferritin specimens prepared with focused ion beam (FIB) to assess whether this approach can be used to effectively characterize biomaterials. Soft matter is particularly sensitive to ion beam exposure which can induce physical and chemical changes. We employ protective metal films and low-energy ion fluence to mitigate potential problems that may be introduced by FIB. This study had two major objectives: (1) to qualitatively assess the viability of the specimens when subjected to the unique physical conditions of APT analysis, namely ultrahigh vacuum, high electric field, and thermal pulsing using a laser and (2) to quantitatively assess the data from such specimens under various experimental parameters and compare the results with appropriate control specimens. For the first objective, a range of experimental parameters were determined that met the basic criteria necessary to validate that ferritin-based specimens prepared with FIB can retain structural integrity during APT analysis. Initial field evaporation time-of-flight mass spectrometry (TOF-MS) data show that the specimens fabricated with FIB are capable of emitting ions under various laser pulsing conditions with a high electric field applied. For the second objective, the experimental parameter space was narrowed to a range that yielded data quality sufficient to produce meaningful comparison between the ferritin-based specimens and the salt-only controls.
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Hot electron temperature and coupling efficiency scaling with prepulse for cone-guided fast ignition. PHYSICAL REVIEW LETTERS 2012; 108:115004. [PMID: 22540481 DOI: 10.1103/physrevlett.108.115004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Indexed: 05/31/2023]
Abstract
The effect of increasing prepulse energy levels on the energy spectrum and coupling into forward-going electrons is evaluated in a cone-guided fast-ignition relevant geometry using cone-wire targets irradiated with a high intensity (10(20) W/cm(2)) laser pulse. Hot electron temperature and flux are inferred from Kα images and yields using hybrid particle-in-cell simulations. A two-temperature distribution of hot electrons was required to fit the full profile, with the ratio of energy in a higher energy (MeV) component increasing with a larger prepulse. As prepulse energies were increased from 8 mJ to 1 J, overall coupling from laser to all hot electrons entering the wire was found to fall from 8.4% to 2.5% while coupling into only the 1-3 MeV electrons dropped from 0.57% to 0.03%.
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In situ site-specific specimen preparation for atom probe tomography. Ultramicroscopy 2006; 107:131-9. [PMID: 16938398 DOI: 10.1016/j.ultramic.2006.06.008] [Citation(s) in RCA: 1193] [Impact Index Per Article: 66.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2006] [Revised: 06/02/2006] [Accepted: 06/16/2006] [Indexed: 11/25/2022]
Abstract
Techniques for the rapid preparation of atom-probe samples extracted directly from a Si wafer are presented and discussed. A systematic mounting process to a standardized microtip array allows approximately 12 samples to be extracted from a near-surface region and mounted for subsequent focused-ion-beam sharpening in a short period of time, about 2h. In addition, site-specific annular mill extraction techniques are demonstrated that allow specific devices or structures to be removed from a Si wafer and analyzed in the atom-probe. The challenges presented by Ga-induced implantation and damage, particularly at a standard ion-beam accelerating voltage of 30 keV, are shown and discussed. A significant reduction in the extent of the damaged regions through the application of a low-energy "clean-up" ion beam is confirmed by atom-probe analysis of the damaged regions. The Ga+ penetration depth into {100} Si at 30 keV is approximately 40 nm. Clean-up with either a 5 or 2 keV beam reduces the depth of damaged Si to approximately 5 nm and <1 nm, respectively. Finally, a NiSi sample was extracted from a Si wafer, mounted to a microtip array, sharpened, cleaned up with a 5 keV beam and analyzed in the atom probe. The current results demonstrate that specific regions of interest can be accessed and preserved throughout the sample-preparation process and that this preparation method leads to high-quality atom probe analysis of such nano-structures.
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Introduction: a special issue on nanoscale characterization using atom probe field ion microscopy. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2004; 10:323. [PMID: 15233849 DOI: 10.1017/s1431927604040826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
While searching the internet for “nanotechnology,” I was
not surprised to find many definitions. Two of these are as follows:
(1) nanotechnology is the development and use of devices that have a
size of only a few nanometers; and (2) nanotechnology can best be
considered as a “catch-all” description of activities at
the level of atoms and molecules that have applications in the real
world. While nanotechnology is usually focused on the building
of structures at the atomic scale, the characterization of
such structures should also be considered as nanotechnology. At the
Microscopy and Microanalysis 2002 Meeting in Quebec City, together with
Tom Kelly and Mike Thompson, I organized a symposium entitled
“Advances in Nanoscale Technology.” The response to this
symposium was impressive, with 32 contributed and 7 invited
presentations. Some of these presentations concentrated on atom probe
field ion microscopy and form the basis for the invited contributions
in this special issue of Microscopy and Microanalysis.
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Modeling image distortions in 3DAP. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2004; 10:384-390. [PMID: 15233857 DOI: 10.1017/s1431927604040486] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2002] [Indexed: 05/24/2023]
Abstract
A numerical model has been developed to simulate images obtained from the three-dimensional atom probe. This model was used to simulate the artefacts commonly observed in two-phase materials. This model takes into account the dynamic evolution of the atomic-scale shape of the specimen during field evaporation. This article reviews the model and its applications to some specific cases. Local magnification effects were studied as a function of the size, the shape, and the orientation of precipitated phases embedded in the matrix. Small precipitates produce large aberrations in good agreement with experiments. The magnification from such precipitates, as measured from the simulation, is only found to match the theoretical value for mesoscopic scale precipitates (size similar to the specimen size). Orientation effects are also observed in excellent agreement with experiments. The measured thickness of a grain-boundary-segregated film in the simulation is found to decrease with the angle between the normal to the grain boundary and the tip axis. Depth scaling artefacts caused by variation in the evaporation field of atoms in multilayer structures were successfully simulated and again showed good agreement with effects observed experimentally.
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The role of atomic scale investigation in the development of nanoscale materials for information storage applications. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2004; 10:366-372. [PMID: 15233855 DOI: 10.1017/s1431927604040528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2002] [Indexed: 05/24/2023]
Abstract
It is well established that the response of devices based on the giant magnetoresistance (GMR) effect depends critically on film microstructure, with parameters such as interfacial abruptness, the roughness and waviness of the layers, and grain size being crucial. Such devices have applications in information storage systems, and are therefore of great technological interest as well as being of fundamental scientific interest. The layers must be studied at high spatial resolution if the microstructural parameters are to be characterized with sufficient detail to enable the effects of fabrication conditions on properties to be understood, and the techniques of high resolution electron microscopy, transmission electron microscopy chemical mapping, and atom probe microanalysis are ideally suited. This article describes the application of these techniques to a range of materials including spin valves, spin tunnel junctions, and GMR multilayers.
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Porcine circovirus type 2 (PCV-2) coinfections in US field cases of postweaning multisystemic wasting syndrome (PMWS). J Vet Diagn Invest 2002; 14:515-9. [PMID: 12423038 DOI: 10.1177/104063870201400614] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The prevalence of different pathogens detected in combination with porcine circovirus type 2 (PCV-2) was studied retrospectively in field cases of postweaning multisystemic wasting syndrome (PMWS) diagnosed at the Iowa State University Veterinary Diagnostic Laboratory, Ames, Iowa, between January 2000, and September 2001. The presence of PCV-2 antigen in lymphoid tissues and/or lung, demonstrated by immunohistochemistry, together with moderate to severe lymphoid depletion and/or granulomatous lymphadenitis, was used as the criteria for the diagnosis of PMWS. A total of 484 cases fulfilled these criteria. Most of the cases (294/369) of PMWS occurred in pigs between the ages of 8 and 18 weeks, with a peak at 10 weeks of age. Porcine reproductive and respiratory syndrome virus was detected in 51.9% of the cases, Mycoplasma hyopneumoniae in 35.5%, bacterial septicemia in 14.0%, bacterial pneumonia in 7.6%, swine influenza virus in 5.4%, and PCV-2 alone in 1.9%. In cases with bacterial septicemia the most frequently isolated pathogen was Streptococcus suis. In cases with bacterial pneumonia, Pasteurella multocida was the most prevalent.
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Abstract
Swine stomachs were surveyed for evidence of Arcobacter spp. and Helicobacter spp. infections associated with gastric ulceration. A nested PCR test targeted to the 16S rRNA was developed to detect many Arcobacter spp. and Helicobacter spp. An internal oligonucleotide probe was used for differentiation and confirmation of the PCR product. Tissue samples were obtained from the nonglandular and glandular regions of 86 swine stomachs. Evidence of infection with these microbes was detected in 51%, with 77% of the positive samples being identified as A. butzleri using a highly specific probe. Nonglandular stomach samples (44%) were more likely to be positive by PCR than samples from the glandular (23%) region. Gross lesions of any stage of gastric ulceration, ranging from parakeratosis, erosions and ulceration, were observed in 24% of stomachs examined. Of 21 samples with lesions, 52% were positive by the broadly reactive PCR assay for Arcobacter spp. and Helicobacter spp. The majority of PCR-positive samples (75%) had no gross lesions. When a single step PCR assay that was more specific for Arcobacter spp. was used on the nonglandular stomach samples, 10.4% of the 86 samples were positive. Arcobacter spp. were cultured from four of the sample stomachs. Partial sequencing of the 16S rRNA gene identified the isolates as A. butzleri (n = 2), A. cryaerophilus, (n = 1), and a mixed culture of A. butzleri and another Arcobacter spp. (n = 1). A single step PCR assay targeted to the urease gene and culturing methods were used to screen for H. pylori or other closely related urease positive bacteria, but none were found.
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Application of multiplex polymerase chain reaction for rapid identification of Campylobacter jejuni and C coli associated with reproductive failure. Am J Vet Res 1997; 58:1070-5. [PMID: 9328656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To evaluate a multiplex polymerase chain reaction (PCR) to distinguish Campylobacter jejuni from C coli as causes of reproductive failure. PROCEDURE Review of clinical cases of reproductive failure attributed to C jejuni or C coli. RESULTS A case of swine abortion was attributable to infection with C coli. The porcine abortion isolates were verified as C coli by restriction fragment length polymorphism and multiplex PCR. Cases of endometritis in a fox and in mink caused by C jejuni were reviewed, and isolates were confirmed as C jejuni by results of the multiplex PCR. CONCLUSION Multiplex PCR was useful in identifying C coli and C jejuni recovered from atypical cases of reproductive failure. Multiplex PCR in conjunction with conventional assays may be useful for verifying other unusual instances of campylobacteriosis.
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MESH Headings
- Abortion, Septic/microbiology
- Abortion, Septic/physiopathology
- Abortion, Septic/veterinary
- Abortion, Veterinary/microbiology
- Abortion, Veterinary/physiopathology
- Animals
- Base Sequence
- Blotting, Southern/methods
- Blotting, Southern/veterinary
- Campylobacter Infections/complications
- Campylobacter Infections/diagnosis
- Campylobacter Infections/veterinary
- Campylobacter coli/genetics
- Campylobacter coli/isolation & purification
- Campylobacter coli/physiology
- Campylobacter jejuni/genetics
- Campylobacter jejuni/isolation & purification
- Campylobacter jejuni/physiology
- DNA, Bacterial/analysis
- DNA, Bacterial/chemistry
- DNA, Bacterial/genetics
- Electrophoresis, Polyacrylamide Gel/methods
- Electrophoresis, Polyacrylamide Gel/veterinary
- Endometritis/microbiology
- Endometritis/physiopathology
- Endometritis/veterinary
- Female
- Foxes
- Mink
- Oligonucleotides/analysis
- Oligonucleotides/chemistry
- Oligonucleotides/genetics
- Polymerase Chain Reaction/methods
- Polymerase Chain Reaction/veterinary
- Polymorphism, Restriction Fragment Length
- Pregnancy
- Reproduction/physiology
- Swine
- Swine Diseases/diagnosis
- Swine Diseases/microbiology
- Swine Diseases/physiopathology
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Infection of cesarean-derived colostrum-deprived 1-day-old piglets with Arcobacter butzleri, Arcobacter cryaerophilus, and Arcobacter skirrowii. Infect Immun 1996; 64:2295-9. [PMID: 8675340 PMCID: PMC174069 DOI: 10.1128/iai.64.6.2295-2299.1996] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Neonatal piglets have been used as models to study human campylobacteriosis and helicobacteriosis. The purpose of this study was to determine the relative pathogenicities, on the basis of the duration of fecal shedding and colonization of tissues, of three Arcobacter species in 1-day-old cesarean-derived colostrum-deprived piglets. Two experiments were conducted. In experiment 1, two piglets each were infected per os with either Arcobacter butzleri ATCC 49616, Arcobacter cryaerophilus 1B ATCC 43159, Arcobacter skirrowii CCUG 10374, or the three field strains of A. butzleri (approximately 5 X 10(9) CFU per piglet). Rectal swab samples were taken prior to infection and daily thereafter for up to 7 days. Arcobacter spp. were detected at least once in rectal swab samples of all but one of the experimentally infected piglets but not in the control. At necropsy, A. butzleri was recovered from the lung, kidney, ileum, or brain tissues of the four infected piglets which had received either the field strain or the ATCC type strain of A. butzleri. A. cryaerophilus 1B was detected in rectal swab samples for up to 7 days postinfection but was not cultured from tissues at necropsy. Arcobacters were detected in the rectal swab sample of the A. skirrowii-infected piglet only on day 3 postinfection; no isolates were obtained from tissues at necropsy. No gross pathological lesions were consistently noted in the experimentally infected piglets. In experiment 2, two piglets each were infected per os with A. butzleri ATCC 49616, A. cryaerophilus 1A ATCC 43158, A. skirrowii CCUG 10374, or the single A. butzleri field strain Yard J/c (approximately 5 X 10(9) CFU per piglet). Arcobacter spp. were cultured from rectal swab samples of all but one of the experimentally infected piglets at least once. At necropsy Arcobacter spp. were cultured from the liver, kidney, ileum, or brain tissues of two of the four A. butzleri-infected piglets. However, no severe gross pathology was noted. These data suggest that Arcobacter spp., especially A. butzleri, can colonize neonatal pigs.
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Phenotypic and ribosomal RNA characterization of Arcobacter species isolated from porcine aborted fetuses. J Vet Diagn Invest 1996; 8:186-95. [PMID: 8744740 DOI: 10.1177/104063879600800208] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Aerotolerant organisms resembling Campylobacter, now designated as Arcobacter, have been described from aborted farm animals and from cases of human enteritis worldwide. The goals of this study were 1) to attempt to recover Arcobacter spp. from cases of porcine abortion, 2) to characterize these isolates by phenotype and ribotype, and 3) to compare the usefulness of ribotype and phenotype patterns for identifying Arcobacter butzleri and the DNA hybridization groups 1A and 1B of A. cryaerophilus. Isolates of Arcobacter spp. from North Carolina and Iowa were recovered from porcine tissues. In Iowa, Arcobacter spp. were recovered from 43% (13/30) of porcine abortion cases evaluated. Isolations were made from placenta (44%), kidney (44%), and stomach contents (12%), which were the only tissues examined. The most reliable biochemical tests for A. butzleri included growth in 1% glycine and in 1.5% NaCl, weak catalase activity, and resistance to cadmium chloride. Arcobacter cryaerophilus strains were characterized by strong catalase activity and sensitivity to cadmium chloride. The DNA hybridization groups 1A and 1B of A. cryaerophilus could not be distinguished by biochemical tests. This represents the first description of A. cryaerophilus DNA group 1A in animals within the United States.
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Wave packets and Ramsey interference in a one-dimensional continuum. PHYSICAL REVIEW LETTERS 1994; 73:943-946. [PMID: 10057580 DOI: 10.1103/physrevlett.73.943] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Tonsil and turbinate colonization by toxigenic and nontoxigenic strains of Pasteurella multocida in conventionally raised swine. J Vet Diagn Invest 1994; 6:375-7. [PMID: 7948212 DOI: 10.1177/104063879400600318] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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21
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A method for free electron acceleration of particle beams. PHYSICAL REVIEW LETTERS 1993; 71:851-854. [PMID: 10055384 DOI: 10.1103/physrevlett.71.851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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p-wave photodetachment in a static electric field. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1993; 48:310-320. [PMID: 9909601 DOI: 10.1103/physreva.48.310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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23
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s-wave photodetachment in a static electric field. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1993; 47:1946-1952. [PMID: 9909148 DOI: 10.1103/physreva.47.1946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Use of oligodeoxynucleotide probes to verify Campylobacter jejuni as a cause of bovine abortion. J Vet Diagn Invest 1992; 4:348-51. [PMID: 1515500 DOI: 10.1177/104063879200400324] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Electric-field effects in photodetachment from Cl- and S- ions in a microwave field. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:2825-2832. [PMID: 9907314 DOI: 10.1103/physreva.45.2825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Comment on "Electron-beam cooling by stimulated synchrotron emission and absorption". PHYSICAL REVIEW LETTERS 1992; 68:133. [PMID: 10045131 DOI: 10.1103/physrevlett.68.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Isolation of Campylobacter coli from a proliferative intestinal lesion in a ferret. J Vet Diagn Invest 1990; 2:238-9. [PMID: 2094455 DOI: 10.1177/104063879000200319] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Angular distributions in photodetachment from O-. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 40:670-675. [PMID: 9902196 DOI: 10.1103/physreva.40.670] [Citation(s) in RCA: 88] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Single- and multiphoton detachment from stored F- ions. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 40:676-682. [PMID: 9902197 DOI: 10.1103/physreva.40.676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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31
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Measurement of the hyperfine structure of 33S. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 39:3223-3227. [PMID: 9901622 DOI: 10.1103/physreva.39.3223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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32
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Perpendicular laser cooling of a rotating ion plasma in a Penning trap. PHYSICAL REVIEW. A, GENERAL PHYSICS 1988; 38:5698-5706. [PMID: 9900309 DOI: 10.1103/physreva.38.5698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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33
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Calculation of frequency-dependent polarizabilities with application to photodetachment threshold shift in a strong laser field. PHYSICAL REVIEW. A, GENERAL PHYSICS 1988; 38:5107-5114. [PMID: 9900230 DOI: 10.1103/physreva.38.5107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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35
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36
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Photodetachment threshold shift in a strong laser field. PHYSICAL REVIEW LETTERS 1987; 59:2291-2294. [PMID: 10035505 DOI: 10.1103/physrevlett.59.2291] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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37
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Observation of a magnetic-field-dependent g-factor ratio. PHYSICAL REVIEW LETTERS 1987; 58:2535-2538. [PMID: 10034777 DOI: 10.1103/physrevlett.58.2535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Rotational photodetachment spectroscopy of the SeH- ion. PHYSICAL REVIEW. A, GENERAL PHYSICS 1987; 35:2928-2935. [PMID: 9898493 DOI: 10.1103/physreva.35.2928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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39
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Laser photodetachment spectroscopy of S- near the 1D threshold. PHYSICAL REVIEW. A, GENERAL PHYSICS 1987; 35:2321-2323. [PMID: 9898410 DOI: 10.1103/physreva.35.2321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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40
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Observation of resolved Zeeman thresholds in photodetachment in a magnetic field. PHYSICAL REVIEW LETTERS 1987; 58:333-336. [PMID: 10034907 DOI: 10.1103/physrevlett.58.333] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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41
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Observation of quadrupole and dipole diamagnetic shifts in atomic ground-state hyperfine structure. PHYSICAL REVIEW LETTERS 1986; 57:567-570. [PMID: 10034095 DOI: 10.1103/physrevlett.57.567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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42
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Sympathetic cooling of trapped ions: A laser-cooled two-species nonneutral ion plasma. PHYSICAL REVIEW LETTERS 1986; 57:70-73. [PMID: 10033360 DOI: 10.1103/physrevlett.57.70] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Abstract
A diagnosis of many problems affecting the baby pig can be made by careful necropsy of several freshly killed, acutely affected, untreated pigs and the application of one or more of the examinations outlined in this article. The selection and preservation of specimens to be forwarded to diagnostic laboratories for assistance in confirming the tentative diagnosis are of critical importance in gaining the maximum information from a necropsy examination.
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Photodetachment of atomic negative ions near threshold in a magnetic field. PHYSICAL REVIEW. A, GENERAL PHYSICS 1985; 31:2210-2214. [PMID: 9895752 DOI: 10.1103/physreva.31.2210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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45
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Encephalitis caused by Baylisascaris migration in a silver fox. J Am Vet Med Assoc 1983; 183:1274-5. [PMID: 6685718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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46
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47
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Mild transmissible gastroenteritis in pigs suckling vaccinated sows. J Am Vet Med Assoc 1980; 176:539-42. [PMID: 6245050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A strain of transmissible gastroenteritis (TGE) virus of low virulence was isolated from 14-day-old pigs suckling sows vaccinated with an attenuated TGE vaccine. Diarrhea developed in suckling pigs approximately 14 days after farrowing in 4 farrowings; however, none of these pigs died from diarrhea. Diarrhea ceased after the 4th farrowing, when vaccination of sows was discontinued. Experimentally, both the field isolate and the vaccine strain were infective and in some instances lethal for 2-day-old pigs exposed orally; however, neither strain was as virulent as the Purdue strain.
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MESH Headings
- Animal Population Groups/immunology
- Animals
- Animals, Suckling/immunology
- Animals, Suckling/microbiology
- Antibodies, Viral/analysis
- Female
- Fluorescent Antibody Technique
- Gastroenteritis, Transmissible, of Swine/immunology
- Gastroenteritis, Transmissible, of Swine/microbiology
- Gastroenteritis, Transmissible, of Swine/pathology
- Jejunum/pathology
- Swine
- Transmissible gastroenteritis virus/isolation & purification
- Vaccination/veterinary
- Vaccines, Attenuated/immunology
- Viral Vaccines/immunology
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48
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Transmissible gastroenteritis in neonatal dogs: experimental intestinal infection with transmissible gastroenteritis virus. Am J Vet Res 1979; 40:477-86. [PMID: 229745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fourteen neonatal dogs (4 through 11 days of age) were exposed orally to the Purdue strain of transmissible gastroenteritis (TGE) virus, and six dogs of similar age were noninoculated controls. Clinical signs of enteric disease did not develop. Both exposed and control dogs had normal fecal passages and appetite throughout the experiment. Jejunal epithelium from dogs euthanatized at 12, 24, 48, and 96 hours and at 10 days after exposure did not exhibit morphologic alterations detectable by light microscopy. Electron microscopic examination indicated that jejunal epithelial cells contained TGE viral particles as early as 12 hours after dogs were exposed. There were no apparent morphologic alterations or signs of desquamation of virus-infected cells, however. Results of pig transmission studies indicated that viable TGE virus was in jejunal tissue of the dogs as early as 12 hours and as late as 10 days after exposure to the virus.
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