Ophthalmomyiasis interna anterior in a dog: keratotomy and extraction of a Cuterebra sp. larva     

Michele L. Edelmann  Araceli Lucio‐Forster  Thomas J. Kern  Dwight D. Bowman  Eric C. Ledbetter 《Veterinary ophthalmology》2014,17(6):448-453

A 1‐year‐old female spayed mixed‐breed dog was presented for evaluation of acute onset of lethargy and blepharospasm OD. Slit‐lamp biomicroscopy revealed a segmented larva embedded in the inferonasal iris. Moderate anterior uveitis was present. After pharmacologic dilation, mild vitreal hemorrhage and chorioretinal migration tracks were identified. The dog was treated empirically for uveitis for 5 days, after which a keratotomy and larval foreign body extraction was performed. The dog recovered uneventfully from intraocular surgery and remained visual and comfortable. Parasite evaluation confirmed the larva to be a Cuterebra sp. To the authors’ knowledge, this is the first report of canine ophthalmomyiasis interna anterior, and the first report of successful surgical removal from the anterior segment in a dog with preservation of vision.  相似文献   

Equatorial X-ray Emissions: Implications for Jupiter's High Exospheric Temperatures     

JH Waite  GR Gladstone  WS Lewis  P Drossart  TE Cravens  AN Maurellis  BH Mauk  S Miller 《Science (New York, N.Y.)》1997,276(5309):104-108

Observations with the High Resolution Imager on the Rontgensatellit reveal x-ray emissions from Jupiter's equatorial latitudes. The observed emissions probably result from the precipitation of energetic (>300 kiloelectron volts per atomic mass unit) sulfur and oxygen ions out of Jupiter's inner radiation belt. Model calculations of the energy deposition by such heavy ion precipitation and of the resulting atmospheric heating rates indicate that this energy source can contribute to the high exospheric temperatures(>800 kelvin at 0.01 microbar) measured by the Galileo probe's Atmospheric Structure Instrument. Low-latitude energetic particle precipitation must therefore be considered, in addition to other proposed mechanisms such as gravity waves and soft electron precipitation, as an important source of heat for Jupiter's thermosphere.  相似文献   

Capillary tube scanning applied to cell growth kinetics     

N M Braslow  R L Bowman 《Science (New York, N.Y.)》1972,175(29):1436-1440

We have developed an optical scanning instrument which may become a valuable aid in a variety of cell studies. Cell multiplication can be readily monitored with the instrument. By varying the chemical environment in which the cells are tested, questions of research and clinical interest may be quickly and conveniently answered. It appears possible to investigate the chemotherapeutic value of experimental agents, and to scan the sensitivity of a given population of neoplastic cells to a variety of chemotherapeutic agents at several concentrations. The optical scanning system may also be used to investigate certain metabolic pathways of cells in tissue culture, to determine drug resistance, and to assess the effects of medium composition on cell growth. Our studies of BrdU resistance in mouse lymphoma cells were done primarily to demonstrate the potential of this optical scanning method, and we do not intend to continue the cytokinetic studies at present. We trust that others will be stimulated to investigate further applications of this instrumental approach to problems in cell biology.  相似文献   

Global trends in total ozone     

Bowman KP 《Science (New York, N.Y.)》1988,239(4835):48-50

Satellite ozone data from the Total Ozone Mapping Spectrometer from 1979 through 1986 show that recent decreases of total ozone have not been confined to the Antarctic spring season (the Antarctic ozone hole), but are global in extent. The losses are about twice the estimated uncertainty in the satellite data. The decreases are largest in middle and high latitudes and occur in all seasons of the year. The decreases for this 8-year period are comparable in magnitude to the increases observed during the 1960s. Southern Hemisphere values from 1986 are generally greater than those from 1985.  相似文献   

Host-seeking stimulant for parasite of corn earworm: isolation, identification, and synthesis     

Jones RL  Lewis WJ  Bowman MC  Beroza M  Bierl BA 《Science (New York, N.Y.)》1971,173(3999):842-843

13-Methylhentriacontane has been identified in the feces and larvae of the corn earworm, Heliothis zea (Boddie), as the major constituent that triggers the short-range host-seeking response of the parasite Microplitis croceipes (Cresson). This chemical, the first found that mediates the complex host-parasite relation, could upgrade present efforts to use parasites for insect control. Bioassay of closely related compounds indicated that the structural requirements for activity are remarkably specific.  相似文献   

Dynamics of the reaction of methane with chlorine atom on an accurate potential energy surface     

Czakó G  Bowman JM 《Science (New York, N.Y.)》2011,334(6054):343-346

The reaction of the chlorine atom with methane has been the focus of numerous studies that aim to test, extend, and/or modify our understanding of mode-selective reactivity in polyatomic systems. To this point, theory has largely been unable to provide accurate results in comparison with experiments. Here, we report an accurate global potential energy surface for this reaction. Quasi-classical trajectory calculations using this surface achieve excellent agreement with experiment on the rotational distributions of the hydrogen chloride (HCl) product. For the Cl + CHD(3) → HCl + CD(3) reaction at low collision energies, we confirm the unexpected experimental finding that CH-stretch excitation is no more effective in activating this late-barrier reaction than is the translational energy, which is in contradiction to expectations based on results for many atom-diatom reactions.  相似文献   

THE ASSOCIATION OF AMERICAN GEOGRAPHERS     

Bowman I 《Science (New York, N.Y.)》1914,39(1004):478

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Enduring learning deficits and cerebral synaptic malformation from exposure to 10 parts of halothane per million   总被引：4，自引：0，他引：4  

K L Quimby  L J Aschkenase  R E Bowman  J Katz  L W Chang 《Science (New York, N.Y.)》1974,185(151):625-627

Chronic exposure of rats to 10 parts of halothane per million during early life produced later deficits in learning a shock-motivated light-dark discrimination and a food-motivated maze pattern, correlated with enduring synaptic nembrane malformation in cerebral cortex. Adult exposure had no effect. Halothane may provide a useful analytical tool for study of brain. The behavioral-ultrastructural techniques also suggest a standard for assessing the safety of trace toxicants with central nervous system effects.  相似文献   

A calmodulin-related protein that suppresses posttranscriptional gene silencing in plants   总被引：1，自引：0，他引：1  

Anandalakshmi R  Marathe R  Ge X  Herr JM  Mau C  Mallory A  Pruss G  Bowman L  Vance VB 《Science (New York, N.Y.)》2000,290(5489):142-144

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Photoinduced plasticity in cross-linked polymers     

Scott TF  Schneider AD  Cook WD  Bowman CN 《Science (New York, N.Y.)》2005,308(5728):1615-1617

Chemically cross-linked polymers are inherently limited by stresses that are introduced by post-gelation volume changes during polymerization. It is also difficult to change a cross-linked polymer's shape without a corresponding loss of material properties or substantial stress development. We demonstrate a cross-linked polymer that, upon exposure to light, exhibits stress and/or strain relaxation without any concomitant change in material properties. This result is achieved by introducing radicals via photocleavage of residual photoinitiator in the polymer matrix, which then diffuse via addition-fragmentation chain transfer of midchain functional groups. These processes lead to photoinduced plasticity, actuation, and equilibrium shape changes without residual stress. Such polymeric materials are critical to the development of microdevices, biomaterials, and polymeric coatings.  相似文献