Characteristics of Staphylococcus aureus strains from pathological processes in swine     

R Hummel  W Wittig  W K?tsche  W Witte 《Archiv fuer experimentelle veterinaermedizin》1978,32(2):299-306

120 Staphylococcus aureus strains from different and sporadic pathological process in swines have been investigated on biochemical properties and phage patterns. 98 strains (82%) exhibit coagulation of human plasma, no coagulation of bovine plasma, crystal-violet-type C, hemolysin-type beta, no formation of fibrinolysine and sensitivity for phages of group I, III and M. Only in few strains we observed reactions with phages of group II. 26 from 66 strains were resistant to antibiotics, and among them 24 showed resistance to oxytetracacline.  相似文献   

Tropical tropospheric ozone and biomass burning     

Thompson AM  Witte JC  Hudson RD  Guo H  Herman JR  Fujiwara M 《Science (New York, N.Y.)》2001,291(5511):2128-2132

New methods for retrieving tropospheric ozone column depth and absorbing aerosol (smoke and dust) from the Earth Probe-Total Ozone Mapping Spectrometer (EP/TOMS) are used to follow pollution and to determine interannual variability and trends. During intense fires over Indonesia (August to November 1997), ozone plumes, decoupled from the smoke below, extended as far as India. This ozone overlay a regional ozone increase triggered by atmospheric responses to the El Ni?o and Indian Ocean Dipole. Tropospheric ozone and smoke aerosol measurements from the Nimbus 7 TOMS instrument show El Ni?o signals but no tropospheric ozone trend in the 1980s. Offsets between smoke and ozone seasonal maxima point to multiple factors determining tropical tropospheric ozone variability.  相似文献   

Sarcolemmal Specific Collagen VI Deficient Myopathy in a Labrador Retriever     

K. Marioni‐Henry  P. Haworth  H. Scott  P. Witte  L.T. Guo  G. Diane Shelton 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2014,28(1):243-249

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Joshua Lederberg's interest in ignorance     

Hearst Witte M 《Science (New York, N.Y.)》2008,320(5880):1159

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Evidence for Glacial Control of Rapid Sea Level Changes in the Early Cretaceous   总被引：2，自引：0，他引：2  

HM Stoll  DP Schrag 《Science (New York, N.Y.)》1996,272(5269):1771-1774

Lower Cretaceous bulk carbonate from deep sea sediments records sudden inputs of strontium resulting from the exposure of continental shelves. Strontium data from an interval spanning 7 million years in the Berriasian-Valanginian imply that global sea level fluctuated about 50 meters over time scales of 200,000 to 500,000 years, which is in agreement with the Exxon sea level curve. Oxygen isotope measurements indicate that the growth of continental ice sheets caused these rapid sea level changes. If glaciation caused all the rapid sea level changes in the Cretaceous that are indicated by the Exxon curve, then an Antarctic ice sheet may have existed despite overall climatic warmth.  相似文献   

Application of Exogenous Esterified Hyaluronan to Equine Distal Limb Wounds     

Stefan H. Witte  Abayomi K. Olaifa  Andrew J. Lewis  Randy B. Eggleston  Jaroslava Halper  Manfred Kietzmann  Wolfgang Baeumer  P.O. Eric Mueller 《Journal of Equine Veterinary Science》2009

The objective of this study was to evaluate the efficacy of topical application of a hyaluronan (HA) derivative in wound healing with respect to the rate of epithelialization, fibroplasia, angiogenesis and contraction, magnitude of the local inflammatory response, local expression of transforming growth factor-β 1 and 3 (TGF-β 1 and 3), tumor necrosis factor-α (TNF-α), and collagen type III deposition. In six healthy adult horses, six full-thickness skin wounds were created on the dorsal aspect of both metacarpi using a sterile template. Sites were sampled at 0, 1, 2, 5, 14, 21, and 35 days following wounding. Wounds on one limb were dressed with commercially available esterified HA fleece under a nonadherent dressing. The opposite limb was covered with the nonadherent dressing alone (control). Images of the most proximal wounds were used to determine the area of total healing and the relative contributions of epithelialization and contraction to healing. At each sample time, a control and treatment biopsy were taken for histological evaluation and special stains. All samples were evaluated for degree of inflammation, fibroplasia and angiogenesis; in situ hybridization for type III collagen, TGFβ1 and 3, and immunohistochemistry for TNF-α. Mean percentages of total wound healing, epithelialization, and wound contraction were not significantly different between control and treatment groups. In treated horses, initial wound expansion was significantly decreased during the first 2 weeks. Mononuclear cell numbers, counted in the granulation tissue, increased in both control and treated limbs over the entire course of the study. However at day 35 the macrophage numbers counted in the treated horses were significantly increased compared with the control limbs (P < .05). Although not statistically significant, relative staining for type III collagen in the treated wounds was less than that of control wounds. Results of the present study do not support a benefit of an exogenous HA-derivative in the healing of distal limb wounds in horses. The shortcomings of the study design are discussed.  相似文献   

Abrupt shift in subsurface temperatures in the tropical pacific associated with changes in El Nino   总被引：1，自引：0，他引：1  

TP Guilderson  DP Schrag 《Science (New York, N.Y.)》1998,281(5374):240-243

Radiocarbon (14C) content of surface waters inferred from a coral record from the Galapagos Islands increased abruptly during the upwelling season (July through September) after the El Nino event of 1976. Sea-surface temperatures (SSTs) associated with the upwelling season also shifted after 1976. The synchroneity of the shift in both 14C and SST implies that the vertical thermal structure of the eastern tropical Pacific changed in 1976. This change may be responsible for the increase in frequency and intensity of El Nino events since 1976.  相似文献