Wirksamkeitsbestimmung von MKS-Vaccinen im 3-Punkte-Test an Mäusen     

D. Bernhardt  W. Runge  H. Kindt 《Zoonoses and public health》1977,24(4):293-296

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Climate Change During the Last Deglaciation in Antarctica   总被引：1，自引：0，他引：1  

PA Mayewski  MS Twickler  SI Whitlow  LD Meeker  Q Yang  J Thomas  K Kreutz  PM Grootes  DL Morse  EJ Steig  ED Waddington  ES Saltzman  P Whung  KC Taylor 《Science (New York, N.Y.)》1996,272(5268):1636-1638

Greenland ice core records provide clear evidence of rapid changes in climate in a variety of climate indicators. In this work, rapid climate change events in the Northern and Southern hemispheres are compared on the basis of an examination of changes in atmospheric circulation developed from two ice cores. High-resolution glaciochemical series, covering the period 10,000 to 16,000 years ago, from a central Greenland ice core and a new site in east Antarctica display similar variability. These findings suggest that rapid climate change events occur more frequently in Antarctica than previously demonstrated.  相似文献   

Stress radiographic assessment of collateral ligament constraints on the feline tarsocrural joint     

ES Martin  T Foo  G Hosgood  AD Moles 《Australian veterinary journal》2023,101(1-2):65-77

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Zur ökonomischen Auswertung von Fruchtfolgeversuchen mit unterschiedlichem Futterpflanzenanteil auf verschiedenen Standorten 2. Mitteilung: Die Anwendung der linearen Optimierung bei der ökonomischen Auswertung von Fruchtfolgeversuchen     

Frieder Bernhardt  Joachim Lange 《Archives of Agronomy and Soil Science》2013,59(9):837-860

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Osteomyelitis of the Patella in Eight Foals     

Alastair T. Kay BVSc  MS  Diplomate ACVS  Robert J. Hunt DVM  MS  Diplomate ACVS  Dwayne H. Rodgerson DVM  MS  Diplomate ACVS  Michael A. Spirito DVM  Elizabeth M. Santschi DVM  Diplomate ACVS  Richard J. Payne BSc  BVSc  Cert ES 《Veterinary surgery : VS》2012,41(2):307-315

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有机配体、竞争阳离子和pH对土壤中Zn分解的影响   总被引：1，自引：0，他引：1  

P. LOMBN/ES  A. C. CHANG  B. R. SINGH 《土壤圈》2008,18(1):92-101

A series of experiments were conducted to examine the interactive effects of an organic ligand, a competing cation, and pH on the dissolution of zinc （Zn） from three California soils, Maymen sandy loam, Merced clay, and Yolo clay loam. The concentrations of soluble Zn of the three soils were low in a background solution of Ca（NO3）2. Citric acid, a common organic ligand found in the rhizosphere, was effective in mobilizing Zn in these soils; its presence enhanced the concentration of Zn in soil solution by citrate forming a complex with Zn. The ability of Zn to form a complex with citric acid in the soil solution was dependent on the concentration of citric acid, pH, and the concentration of the competing cation Ca^2＋. The pH of the soil solution determined the extent of desorption of Zn in solid phase in the presence of citric acid. The amounts of Zn released from the solid phase were proportional to the concentration of citric acid and inversely proportional to the concentration of Ca（NO3）2 background solution, which supplied the competing cation Ca^2＋ for the formation of a complex with citrate. When the soil suspension was spiked with Zn, the adsorption of Zn by the soils was retarded by citric acid via the formation of the soluble Zn-citrate complex. The dissolution of Zn in the presence of citric acid was pH dependent in both adsorption and desorption processes.  相似文献   

Improving the fertility of sandy soils in the temperate region by combined biochar and microbial inoculant treatments     

Márk Rékási  Tibor Szili-Kovács  Tünde Takács  Botond Bernhardt  Ildikó Puspán  Rita Kovács 《Archives of Agronomy and Soil Science》2019,65(1):44-57

Achieving a sustainable increase in the fertility of sandy soils is a major problem. The application of biochar (BC) is a relatively new method, but results for a temperate climate are scarce. This work investigates various combined doses of BC and plant growth-promoting rhizobacteria inoculants on the fertility of acidic and calcareous sandy soils, hypothesising that joint application could have a synergistic impact. The effects were followed by measuring chemical (pH, organic matter, nutrient availability) and microbiological properties of the soil and maize biomass. 30 t ha^?1 BC increased both pH (by 1 unit) and nitrification in acidic soil (causing a 60% drop in NH₄-N concentration), and the phosphorus and potassium availability (by 53 and 80%, respectively) in both soils. Substrate-induced respiration increased by up to 100% and 50% in acidic and calcareous soil, respectively, in treatments involving both BC and inoculant. In acidic soil a BC dose of 3 t ha^?1 resulted in a 70% decrease in arbuscular mycorrhizal fungal infection. Changes in maize grain yield were not significant, but the increase in above-ground biomass indicated that the combined application of BC and inoculant is more beneficial than separate application of these yield-increasing agents, primarily on acidic sand.  相似文献   

Suboptimal growth associated with porcine intestinal adenomatosis in pigs in nutritional studies     

RP GOGOLEWSKI  RW COOK  ES BATTERHAM 《Australian veterinary journal》1991,68(12):406-408

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Jarosite and hematite at Meridiani Planum from Opportunity's Mossbauer Spectrometer     

Klingelhöfer G  Morris RV  Bernhardt B  Schröder C  Rodionov DS  de Souza PA  Yen A  Gellert R  Evlanov EN  Zubkov B  Foh J  Bonnes U  Kankeleit E  Gütlich P  Ming DW  Renz F  Wdowiak T  Squyres SW  Arvidson RE 《Science (New York, N.Y.)》2004,306(5702):1740-1745

Mossbauer spectra measured by the Opportunity rover revealed four mineralogical components in Meridiani Planum at Eagle crater: jarosite- and hematite-rich outcrop, hematite-rich soil, olivine-bearing basaltic soil, and a pyroxene-bearing basaltic rock (Bounce rock). Spherules, interpreted to be concretions, are hematite-rich and dispersed throughout the outcrop. Hematitic soils both within and outside Eagle crater are dominated by spherules and their fragments. Olivine-bearing basaltic soil is present throughout the region. Bounce rock is probably an impact erratic. Because jarosite is a hydroxide sulfate mineral, its presence at Meridiani Planum is mineralogical evidence for aqueous processes on Mars, probably under acid-sulfate conditions.  相似文献   

Subtropical goats ovulate in response to the male effect after a prolonged treatment of artificial long days to stimulate their milk yield          下载免费PDF全文

ES Mendieta  JA Delgadillo  JA Flores  MJ Flores  E Nandayapa  LI Vélez  LA Zarazaga  M Bedos  A Terrazas  H Hernández 《Reproduction in domestic animals》2018,53(4):955-962

The objectives of this study were to determine (i) if in subtropical goats that gave birth during mid‐December, the exposition to an artificial long‐day photoperiod consisting in only 14 hr of light per day can increase the milk yield and (ii) to test whether these females can respond to the male effect at the end of the prolonged photoperiodic treatment. In experiment 1, 17 lactating goats were maintained under natural short days (control group), while another 22 goats were maintained under artificial long days (treated group) consisting in 14 hr light and 10 hr darkness starting at day 10 of lactation. The continuous exposition to an artificial long‐day photoperiod produced an increase in the milk yield level during the first 110 days of lactation (time × treatment interaction; p = .01), while none of the milk components were modified due to the photoperiodic treatment (p > .05). In experiment 2, all control and treated anovulatory goats were submitted to the male effect using photostimulated males. All females showed oestrous behaviour within the first 10 days that were in contact with males (100% in both groups; p > .05). Thus, the latency to onset of oestrus did not differ between females from control (58.2 ± 3.0 hr) and treated (62 ± 4.6 hr) groups. Male exposition provoked ovulation independently if females were previously under long days or natural photoperiod (96 vs 100%, respectively; p = .79). It was concluded that exposure to 14 hr of light per day in subtropical goats that gave birth in late autumn stimulates milk yield without preventing the ovulation in response to the male effect at the end of the prolonged photoperiodic treatment.  相似文献