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排序方式: 共有62条查询结果,搜索用时 15 毫秒
1.
Hoppe A Denneberg T 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(4):361-367
The purpose of this study was to summarize 14 years of clinical experience with medical treatment of 88 cystinuric dogs. Of special interest was evaluation of recurrence rate of cystine uroliths and adverse effects during long-term tiopronin treatment. Twenty-six different breeds were recognized, and the most common breeds were Dachshunds, Tibetan Spaniels, and Basset Hounds. In 76 of 88 treated dogs (86%), re-formation of cystine uroliths was prevented. Recurrence rate of cystine uroliths changed from 7 months before to 18 months during tiopronin treatment. On 28 occasions, bladder stones were found, and in about 60% of the dogs, the uroliths dissolved. Quantitative measurement of the urinary excretion of cystine showed a significantly (P < .03) higher excretion of cystine in dogs with recurrent urolith formation than in dogs with only 1 urolith episode. Another finding was a significant (P = .02) decrease in urinary cystine excretion in older (>5 years) than in younger (<5 years) dogs. Adverse effects were found in 11 dogs, and the most severe signs were aggressiveness and myopathy. All signs disappeared when tiopronin treatment was stopped. In conclusion, this study emphasizes the importance of an individual strategy for lifelong treatment of cystinuria. In addition to increasing water intake, chemical modification of the cysteine molecule into a more soluble form by means of tiopronin is useful. In dogs with re-formed cystine uroliths, dissolution may be induced by increasing the tiopronin dosage to 40 mg/kg body weight per day. In dogs with a low urolith recurrence rate and low urinary cystine excretion, the tiopronin dosage may be decreased or treatment discontinued. 相似文献
2.
Nils-Erik Ahlberg Med Dr Fredrik Hoppe VDM Ulrike Kelter MD† Leif Svensson PHD‡ 《Veterinary radiology & ultrasound》1985,26(2):43-47
The influence of body position on volume and x-ray attenuation of the lungs of three Beagles was investigated with computed tomography. In left and right lateral recumbency, the dependent lung had decreased volume and increased x-ray attenuation compared with ventral recumbency. Volume and x-ray attenuation of the nondependent lung, however, were unchanged. In dorsal recumbency, there was a vertical gradient of x-ray attenuation being increased dorsally and decreased ventrally compared with ventral recumbency where regional differences in x-ray attenuation were not found. Results indicate a risk of overlooking a mass in the dependent pulmonary parenchyma of dogs in lateral and dorsal recumbency. Regional differences in x-ray attenuation of the lungs of dogs can be avoided if the radiographs are obtained with the dog in ventral recumbency. 相似文献
3.
4.
Computing inbreeding coefficients and the inverse numerator relationship matrix in large populations of honey bees
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Richard Bernstein Manuel Plate Andreas Hoppe Kaspar Bienefeld 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2018,135(4):323-332
The inbreeding coefficients are considered in breeding decisions, and the inverse numerator relationship matrix A ?1 is a prerequisite for breeding value estimation. Polyandry and haploid males are among the specifics of relationships between honey bees. Brascamp and Bijma (2014) averaged out the manifold possible relationships among honey bees that appear to have the same parents in a pedigree and assigned a single entry in A to animals that behave as a unit, for example, the workers of a hive. Their methods of calculation connected full‐sibs in the variance matrix of the Mendelian sampling terms D , via nonzero off‐diagonal elements. This impedes the inversion of A and the closely connected calculation of inbreeding coefficients, because efficient algorithms for this task take D to be a diagonal matrix. Memory limitations necessitate their use for large data sets. We adapted the quickest of them to the block diagonal matrix D , that is postulated for the honey bee. To our knowledge, the presented algorithm is the first one that facilitates the method of Brascamp and Bijma (2014) on large data sets. 相似文献
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6.
Hörz F Bastien R Borg J Bradley JP Bridges JC Brownlee DE Burchell MJ Chi M Cintala MJ Dai ZR Djouadi Z Dominguez G Economou TE Fairey SA Floss C Franchi IA Graham GA Green SF Heck P Hoppe P Huth J Ishii H Kearsley AT Kissel J Leitner J Leroux H Marhas K Messenger K Schwandt CS See TH Snead C Stadermann FJ Stephan T Stroud R Teslich N Trigo-Rodríguez JM Tuzzolino AJ Troadec D Tsou P Warren J Westphal A Wozniakiewicz P Wright I Zinner E 《Science (New York, N.Y.)》2006,314(5806):1716-1719
Particles emanating from comet 81P/Wild 2 collided with the Stardust spacecraft at 6.1 kilometers per second, producing hypervelocity impact features on the collector surfaces that were returned to Earth. The morphologies of these surprisingly diverse features were created by particles varying from dense mineral grains to loosely bound, polymineralic aggregates ranging from tens of nanometers to hundreds of micrometers in size. The cumulative size distribution of Wild 2 dust is shallower than that of comet Halley, yet steeper than that of comet Grigg-Skjellerup. 相似文献
7.
Aharonian F Akhperjanian AG Bazer-Bachi AR Beilicke M Benbow W Berge D Bernlöhr K Boisson C Bolz O Borrel V Braun I Brown AM Bühler R Büsching I Carrigan S Chadwick PM Chounet LM Coignet G Cornils R Costamante L Degrange B Dickinson HJ Djannati-Ataï A Drury LO Dubus G Egberts K Emmanoulopoulos D Espigat P Feinstein F Ferrero E Fiasson A Fontaine G Funk S Funk S Füssling M Gallant YA Giebels B Glicenstein JF Goret P Hadjichristidis C Hauser D Hauser M Heinzelmann G Henri G Hermann G Hinton JA 《Science (New York, N.Y.)》2006,314(5804):1424-1427
The detection of fast variations of the tera-electron volt (TeV) (10(12) eV) gamma-ray flux, on time scales of days, from the nearby radio galaxy M87 is reported. These variations are about 10 times as fast as those observed in any other wave band and imply a very compact emission region with a dimension similar to the Schwarzschild radius of the central black hole. We thus can exclude several other sites and processes of the gamma-ray production. The observations confirm that TeV gamma rays are emitted by extragalactic sources other than blazars, where jets are not relativistically beamed toward the observer. 相似文献
8.
H. H. Hoppe 《Plant foods for human nutrition (Dordrecht, Netherlands)》1980,30(3-4):289-302
Phytoalexins are antimicrobial compounds accumulating in infected plants. Accumulation of phytoalexins has been observed after infections by fungi, bacteria, viruses, and nematodes. Their formation is often associated with cellular necrosis. Evidence exists that the accumulation is based on enhanced de novo synthesis of phytoalexins in living cells adjacent to the necrotic tissue. Antifungal activity of phytoalexins is directed against different pathogenic and nonpathogenic fungi. In some instances, they may contribute to nonhost resistance; in other cases, they might be involved in plant resistance against pathogens. Numerous abiotic inducers of phytoalexin formation are known and highly potent elicitors of phytoalexins have been isolated from fungal cell walls and culture fluids. Keen and associates reported that races ofPhytophthora megasperma produce specific elicitors of phytoalexin formation which are active only in resistant interactions. Albersheim and associates purified and characterized phytoalexin-eliciting -glucans from the same fungus which unspecifically induce phytoalexin accumulation in resistant, susceptible, and also in nonhost plants. Research on elicitors should provide powerful tools for the elucidation of phytoalexin biosynthesis and the role of phytoalexins in plant resistance.
Vortrag, gehalten auf der XVI. Vortrags-Tagung der Deutschen Gesellschaft für Qualitätsforschung (Pflanzliche Nahrungsmittel) (DGQ), am 20.3.1980 in Hamburg. 相似文献
Vortrag, gehalten auf der XVI. Vortrags-Tagung der Deutschen Gesellschaft für Qualitätsforschung (Pflanzliche Nahrungsmittel) (DGQ), am 20.3.1980 in Hamburg. 相似文献
9.
Wenda-Piesik Anna Hoppe Szymon 《Acta Agriculturae Scandinavica, Section B - Plant Soil Science》2018,68(8):678-689
The problem raised here is the intensification of technology in field crops of winter oilseed rape. Is there a justification for this by explaining what relationship between the yield and individual yielding traits are formed in hybrid and population cultivars. During years 2012–2015 field studies to evaluate five hybrid and five population cultivars response on the standard and high-input technology in winter oilseed rape production have been executed in Poland. High-input technology included: double foliar application (in autumn, and in spring) of micro-nutrients, additional top fertilisation of 40?kg N per ha in spring, double application of the amino-acid bio-stimulators, and additional growth regulator. According to the principle component analysis made for both technologies it was found that hybrids and population cultivars displayed varied response which is explained here on the basis of morphological, growth, and yield elements. The high-input technology improved the yield responded elements e.g. number of siliques and number of seeds per silique as well as winter hardiness. This impact was more evident for population cultivars than for hybrids. We state that high-input technology, as the proposal in this paper, that provided 9.6% increase in seed yield, is biologically justified for winter oilseed rape crop and can be recommended in North and central European countries. 相似文献
10.
J.-E. Bergez A. J. I. Dalziel C. Duller W. R. Eason G. Hoppe R. H. Lavender 《Agroforestry Systems》1997,37(3):227-240
Transmitted photosynthetically active radiation (PAR) was measured in eight-year-old silvopastoral stands at three different
locations in the UK by using PAR sensors randomly distributed between four adjacent trees planted in a square pattern. Two
densities (100 stems.ha-1 and 400 stems.ha-1 were compared. The annual carrying capacity (live weight of the animals that a plot supports) was also recorded as an indirect
figure of the overall agricultural production of the system. The silvopastoral plots received less radiation than the agricultural
plot without trees, the 400 stems.ha-1 treatment being more shaded than the 100 stems.ha-1. Over the measurement period, on some special days, a maximum of 30% of the incoming radiation was intercepted on the 400
stem.ha-1 treatment with the largest trees. The amount of light intercepted was highly correlated with the type of weather and the
leaf area development of the trees: the brighter the day and more expanded the leaf area, the higher was the proportion of
radiation intercepted by the tree. However, over the measuring period, a small amount of radiation was intercepted by the
tree canopies. As a consequence, no differences were observed in the annual carrying capacity.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献