Microbial use of lignite compared to recent plant litter as substrates in reclaimed coal mine soils     

Cornelia Rumpel  Ingrid Kögel-Knabner 《Soil biology & biochemistry》2004,36(1):67-75

In the Lusatian mining district, rehabilitated mine soils contain substantial amounts of lignite in addition to recent carbon derived from plant litter. The aim of this study was to examine the importance of the two organic matter types as substrates for soil microbial biomass in mine soils containing organic matter with a contrasting degree of humification. Samples were taken from the lignite-containing overburden material, from a mine soil under 14-year-old black pine (Pinus nigra) and from a mine soil under 37-year-old red oak (Quercus rubra). Overburden material was ameliorated with alkaline ash and incubated in an identical manner as the 14-year-old and 37-year-old mine soils for 16 months. Carbon mineralisation was monitored throughout. After 0, 3, 6, 12 and 16 months, samples were removed and analysed for chemical parameters and for microbial biomass. In addition, ¹⁴C activity measurements in bulk soil and microbial biomass were used to estimate their lignite content.Despite the high content of organic carbon in lignite-rich overburden material, low contents of microbial biomass were recorded. Ash-amelioration led to high pH values in the overburden material, resulting in high concentrations of dissolved organic carbon most likely derived from lignite. Development of the microbial community was subsequently stimulated by presence of an easily available carbon source. In older mine soils, larger amounts of microbial biomass are most likely related to the presence of recent organic matter. Radiocarbon analysis of the microbial biomass extracted from the 14-year-old mine soil indicated higher lignite carbon contribution than recorded for microbial biomass of the 37-year-old mine soil. The highest concentration of lignite C present in microbial biomass as indicated by the C_mic/C_org ratio was, however, observed in the ameliorated overburden material. Therefore, we conclude that the importance of lignite as a carbon source for micro-organisms decreases when recent organic matter is present in the older stages of mine soil development.  相似文献   

Solanum scabrum—a potential source of a coloring plant extract     

Cornelia Lehmann  Christoph Biela  Stefan Töpfl  Gisela Jansen  Rudolf Vögel 《Euphytica》2007,158(1-2):189-199

The objective of this study was to examine the potential of Solanum scabrum to provide a colorant for food. We conducted a field trial with eight accessions from four different sources and recorded both morphological variability and fruit yield differences between accessions. Further, anthocyanin and glucoalkaloid concentrations were determined. The accessions could be assigned to two distinct groups: a leafy vegetable type with toxic fruits used in Africa and a berry type with edible fruits known as Garden Huckleberry in North America, but both types had edible leaves with low glucoalkaloid concentrations. The leafy vegetable type set not much fruit. In contrast, the berry type yielded on average 800–900 g berries per plant with remarkable high anthocyanin concentrations of 8.1–13.9 g kg⁻¹ fresh weight, calculated as petunidin 3-p-(coumaryl-runtinoside)-5-glucoside. Thus, S. scabrum can serve as a source for natural anthocyanin pigments. In particular, two accessions with a high fruit yield were promising candidates as a berry crop. One had the best anthocyanin concentration of the examined material and the other one had a low percentage of unripe berries as a further advantage.  相似文献   

Variation in black spruce (<Emphasis Type="Italic">Picea mariana</Emphasis> (Mill.) BSP) wood quality after thinning     

Manon Vincent  Cornelia Krause  Ahmed Koubaa 《Annals of Forest Science》2011,68(6):1115-1125

• Introduction   

Commercial thinning (CT) could contribute to increase short-term tree growth and be beneficial in a cold climate, as in boreal regions. Thus, growth rate, ring density and flexural modulus of elasticity (MOE) of trees may change after CT. Moreover, mechanical wood properties vary with position in the tree, and there is a need to develop optimal log allocation strategies in order to allocate logs to their best use.  相似文献   

Transcriptome of silicon-induced resistance against Ralstonia solanacearum in the silicon non-accumulator tomato implicates priming effect     

Hassan Ghareeb  Zoltán Bozsó  Peter G. Ott  Cornelia Repenning  Frank Stahl  Kerstin Wydra 《Physiological and Molecular Plant Pathology》2011,75(3):83-89

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Folate content in strawberries (Fragaria x ananassa): effects of cultivar,ripeness, year of harvest,storage, and commercial processing     

Strålsjö LM  Witthöft CM  Sjöholm IM  Jägerstad MI 《Journal of agricultural and food chemistry》2003,51(1):128-133

Folate concentrations in strawberries and folate retention during storage and commercial processing of strawberries were investigated. No previous study has focused on the effects of cultivar, ripeness, and year of harvest of strawberries with respect to the folate content. This study showed the folate concentration in strawberries to significantly depend on all of these different factors. Total folate was quantified using a modified and validated radioprotein-binding assay with external calibration (5-CH(3)-H(4)folate). Folate content in 13 different strawberry cultivars varied from 335 microg/100 g of dry matter (DM) for cv. Senga Sengana to 644 microg/100 g of DM for cv. Elsanta. Swedish harvests from 1999 and 2001 yielded higher folate concentrations than did the harvest from 2000, and the grade of ripeness affected the folate content in strawberries. This study indicated high folate retention in intact berries during storage until 3 or 9 days at 4 degrees C (71-99%) and also in most tested commercial products (79-103%). On the basis of these data fresh strawberries as well as processed strawberry products are recommended to be good folate sources. For instance, 250 g (fresh weight) of strawberries ( approximately 125 microg of folate) supplies approximately 50% of the recommended daily folate intake in various European countries (200-300 microg/day) or 30% of the U.S. recommendation (400 microg/day).  相似文献   

Comparison of urine protein profiles in cats without urinary tract disease and cats with idiopathic cystitis, bacterial urinary tract infection, or urolithiasis     

Lemberger SI  Deeg CA  Hauck SM  Amann B  Hirmer S  Hartmann K  Dorsch R 《American journal of veterinary research》2011,72(10):1407-1415

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Eosinophilia in a cat with acute leukemia     

Gilroy C  Forzán M  Drew A  Vernau W 《The Canadian veterinary journal. La revue veterinaire canadienne》2011,52(9):1004-1008

A 4-year-old castrated male domestic shorthaired cat with a history of vomiting and anorexia was diagnosed with leukemia with marked hepatic and splenic infiltration and concurrent eosinophilia with marked tissue infiltration. Despite thorough immunocytochemical and immunohistochemical immunophenotyping, the cell lineage of the leukemia was not identified.  相似文献   

Infections with Anaplasma phagocytophilum in dogs in Germany     

B. Kohn  C. Silaghi  G. Arndt 《Research in veterinary science》2011,91(1):71-76

The main objectives of this prospective study were to establish prevalence of Anaplasma phagocytophilum infections in dogs from Northeast Germany; and to evaluate the hematological parameters of sero- or real-time PCR-positive clinically healthy dogs. The mean prevalence of A. phagocytophilum seropositivity of 522 dogs (258 suspected to have anaplasmosis, 264 healthy) was 43%. There was no difference between sick (46.9%) and healthy dogs (39.8%) (p = 0.100). The PCR test was positive in 30 dogs (20 sick, 10 healthy); morulae were found in 12 of them. Twenty-six of 30 dogs tested PCR-positive between May and September (p < 0.05). There was no difference with regard to abnormal CBC parameters between seropositive and seronegative clinically healthy dogs. The CBC was within reference range in 10 PCR-positive clinically healthy dogs suggesting a routine examination of blood donors for A. phagocytophilum in endemic areas to minimize the risk of transmission.  相似文献   

COMPARATIVE EVALUATION OF THE VENTRICLES IN THE YORKSHIRE TERRIER AND THE GERMAN SHEPHERD DOG USING LOW-FIELD MRI     

Barbara  Esteve-Ratsch  DMV  Sibylle  Kneissl  DMV  Cornelia  Gabler  DMV 《Veterinary radiology & ultrasound》2001,42(5):410-413

MR images provide for the exact assessment of the brain, including ventricular size. Still inter- and intrabreed comparison of ventricle size is difficult due to the varying anatomies in dogs. To compare the ventricle area of different sized breeds, 25 dogs (13 Yorkshire Terriers and 12 German Shepard dogs) were reviewed, retrospectively. Hemisphere and ventricle of each side were outlined manually three times. All measurements were averaged and their percentage (ventricle area by hemisphere area) was defined as the relative ventricle area. This value in Yorkshire Terriers (5.3) was significantly higher compared to German Shepard dogs (1.7). However, on the basis of the neurologically symptomatic sample (7 Yorkshire Terriers) in this study, threshold values of normal and abnormal relative ventricle areas could not be detected.  相似文献   

Values and the agricultural crisis: Differential problems,solutions, and value constraints     

Cornelia Butler Flora 《Agriculture and Human Values》1986,3(4):16-23

Policies are set by governments in an attempt to bring about desired ends within a society. These ends are often vaguely put and phrased in terms of values. Agrarianism, as a value, has been used to justify current farm policy. Yet, that policy has also been used as a mechanism to solve a variety of problems for the United States: those of the rural sector, farmers themselves, and even the land upon which they farm. This paper tries to separate the problems that are part of the farm crisis and to show how policies designed to solve one of the problems for one set of actors, and frequently defended in the name of agrarianism, may actually exacerbate the problems for other actors. An overarching value, however, that may further inhibit problem solution and lead us further into an expensive and ineffectual farm program is the basic value that planning is somehow bad. Agrarianism and the value of spontaneity underlie some of the current decision-making or lack thereof in the farm program.  相似文献