Constituents in evening primrose oil with radical scavenging,cyclooxygenase, and neutrophil elastase inhibitory activities     

Hamburger M  Riese U  Graf H  Melzig MF  Ciesielski S  Baumann D  Dittmann K  Wegner C 《Journal of agricultural and food chemistry》2002,50(20):5533-5538

Cold-pressed, non-raffinated evening primrose oil was found to contain lipophilic radical scavengers. A highly enriched fraction of these compounds could be obtained from the oil by extraction with aqueous ethanol and subsequent liquid-liquid partitioning with petroleum. LC-DAD-MS analysis revealed that the fraction contained three aromatic compounds with identical UV and ESI-MS spectra. The compounds were isolated by RP-HPLC and their structures established by chemical and spectroscopic means as 3-O-trans-caffeoyl derivatives of betulinic, morolic, and oleanolic acid. The morolic acid derivative was a new compound. The three esters exhibited pronounced radical scavenging activity against the stable 2,2-diphenyl-1-picrylhydrazyl radical and were potent inhibitors of neutrophil elastase and cyclooxygenase-1 and -2 in vitro. Commercial samples of evening primrose oils contained only traces of these lipophilic antioxidants.  相似文献   

Tonometry in Merle dogs     

G Klinckmann  W Wegner 《DTW. Deutsche tier?rztliche Wochenschrift》1987,94(6):337-338

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Veränderungen der Muskelfasertypenverteilung im M. longissimus dorsi von Ebern während des Wachstums, dargestellt mit verschiedenen histochemischen Methoden     

J. Wegner    Ilse  Fiedler  Danuta  Klosowska  B. Klosowski  Brigitte  Ziegan 《Anatomia, histologia, embryologia》1993,22(4):355-359

Changes in the distribution of muscle-fiber-types from the M. longissimus dorsi of male pigs. A Histochemical Approach Samples of the M. longissimus dorsi from growing up pigs were taken by a shooting-biopsy. The types of muscle-fibers could be demonstrated by two different histochemical staining procedures. With these two histochemical staining procedures significant differences between the different structure of the muscle-fibers during increasing age of the pigs could be detected.  相似文献   

Audiometric findings in dachshunds (merle gene carriers)]     

I Reetz  M Stecker  W Wegner 《DTW. Deutsche tier?rztliche Wochenschrift》1977,84(7):273-277

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Pharmacokinetic and pharmacodynamic evaluation of intravenous hydromorphone in cats     

Wegner K  Robertson SA  Kollias-Baker C  Sams RA  Muir WW 《Journal of veterinary pharmacology and therapeutics》2004,27(5):329-336

This study describes the pharmacokinetics of intravenous hydromorphone in cats and the simultaneous measurement of antinociceptive pharmacodynamic effects using a thermal threshold testing system. Following establishment of a baseline thermal threshold, six adult cats were administered 0.1 mg/kg of hydromorphone intravenously. Thermal threshold testing and blood collection were conducted simultaneously at predetermined time points. Plasma hydromorphone concentrations were determined by a liquid chromatographic-mass spectral method and pharmacokinetic analysis was performed by nonlinear least squares regression analysis. Plasma hydromorphone concentrations declined rapidly over time, and were below the limit of quantification of the assay (LOQ = 1.0 ng/mL) by 360 min. In contrast, thermal thresholds rose from a pretreatment value of 40.9 +/- 0.65 degrees C (mean +/- SEM) to instrument cut-out (55 degrees C) within 15 min and remained significantly elevated from 15-450 min after treatment. Inspection of the data revealed no direct correlation between plasma hydromorphone concentrations and the antinociceptive effect of this drug in cats. These findings support the importance of conducting pharmacokinetic studies in parallel with objective measurements of drug effect.  相似文献   

Computer image analysis of intramuscular adipocytes and marbling in the longissimus muscle of cattle     

Yang XJ  Albrecht E  Ender K  Zhao RQ  Wegner J 《Journal of animal science》2006,84(12):3251-3258

The deposition of fat in muscle, recognized by the consumer as marbling, is an important meat quality trait. The objective of the study was to provide additional insights into the quantitative extent of marbling by means of computer image analysis. Fifty-one F(2) generation German Holstein and Charolais crossbreed cattle, 18 mo of age, were used to determine relationships among marbling traits, adipocyte size, and the amount of adipose tissue in different depots. Differences were recorded among the size of i.m. adipocytes in different groups of marbling flecks, divided according to the location in the muscle cross-section and to the size of the marbling flecks. The results showed positive correlation between i.m. adipocyte size and the weight of s.c. fat, intestinal fat, omental fat, and perirenal fat (r = 0.50, 0.61, 0.70, and 0.63, respectively, P < 0.001). The i.m. adipocyte size was correlated with i.m. fat content, number of marbling flecks, proportion of marbling fleck area, and total length of marbling flecks (r = 0.71, 0.44, 0.62, and 0.55, respectively, P < 0.01). The number of marbling flecks was also correlated with i.m. fat content, proportion of marbling fleck area, and total length of marbling flecks (r = 0.58, 0.62, and 0.91, P < 0.01, respectively). The ventral marbling flecks had a 5-fold larger fleck area, 4-fold more adipocytes, and larger adipocytes (P < 0.001). Larger marbling flecks contained larger adipocytes (P < 0.001). Moreover, compared with the small marbling flecks, there was a 48-fold larger fleck area and 26-fold more adipocytes in the large marbling flecks. The results indicate that i.m. fat deposition increases concurrently with the other fat depots but is still independent. Furthermore, the i.m. fat is preferentially deposited in the ventral area of LM. Although the i.m. adipocyte size has an important effect on the traits of marbling flecks, cell number plays a greater role in i.m. fat deposition than cell size.  相似文献   

Anesthesia case of the month. Pulmonary abscess formation     

Wegner K  Pablo L 《Journal of the American Veterinary Medical Association》2006,228(6):850-853

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Ultrathin films of a polyelectrolyte with layered architecture     

AR Esker  C Mengel  G Wegner 《Science (New York, N.Y.)》1998,280(5365):892-895

Posttransfer modification of preformed Langmuir-Blodgett films of poly(tert-butyl methacrylate) and poly(tert-butyl acrylate) by gaseous hydrochloric acid yields films with layered architecture of poly(methacrylic acid) and poly(acrylic acid), respectively. X-ray reflectivity and infrared spectroscopy confirm monolayer by monolayer transfer of the source polymers and their transformation to acid multilayer assemblies with retention of low surface roughnesses. The incorporation of cross-linking groups into the system offers the possibility for further chemical modification to produce ultrathin films of model networks desirable for bioadsorption studies and as hydrophilic spacing layers for tethered membranes.  相似文献   

Antinociceptive and side-effects of hydromorphone after subcutaneous administration in cats     

Robertson SA  Wegner K  Lascelles BD 《Journal of Feline Medicine and Surgery》2009,11(2):76-81

The subcutaneous (SC) route is often chosen for drug administration in cats because it is easier to perform than intravenous (IV) injection and is perceived as less painful than intramuscular (IM) injection. However, little is known of how the route of administration influences the pharmacodynamics of drugs. This study measured the changes in skin temperature and thermal threshold (TT) and recorded the side-effects after SC injection of 0.1mg/kg of hydromorphone in six cats. Time to peak TT was 105min. Skin temperature was elevated at 15min and between 45 and 360min. Five cats vomited and two exhibited marked dysphoria. Compared to previously published studies of IV and IM administration of hydromorphone, the SC route results in a slower onset of peak effect, a shorter duration of antinociception and is associated with more undesirable side-effects. As with IV and IM injections, SC administration of hydromorphone at 0.1mg/kg is associated with a significant elevation in skin temperature. Overall, the SC route appears to have the least utility.  相似文献   

Organic Agriculture： Socioeconomic Sustainability of Brazilian Coffee     

Rubia Wegner  Patricia Helena Nogueira Turco  Faivia Maria de Mello Bliska 《农业科学与技术》2013,(1):20-32

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