Root growth dynamics inside and outside of soil biopores as affected by crop sequence determined with the profile wall method     

Eusun Han  Timo Kautz  Ute Perkons  Daniel Uteau  Stephan Peth  Ning Huang  Rainer Horn  Ulrich Köpke 《Biology and Fertility of Soils》2015,51(7):847-856

  相似文献   

Endopeptidase EP-1 as a Marker for the Eyespot Resistance Gene Pch-1 from Aegilops ventricosa in Wheat Line 'H-93-70'     

Ute  Vahl G. Müller 《Plant Breeding》1991,107(1):77-79

Biochemical marker endopeptidase EP-1 was used to determine that an eyespot resistance gene, transferred from Aegilops ventricosa to the hexaploid wheat line ‘H-93-70’ is located on the long arm of the chromosome 7D.  相似文献   

Dereplication Strategies for Targeted Isolation of New Antitrypanosomal Actinosporins A and B from a Marine Sponge Associated-Actinokineospora sp. EG49     

Usama Ramadan Abdelmohsen  Cheng Cheng  Christina Viegelmann  Tong Zhang  Tanja Grkovic  Safwat Ahmed  Ronald J. Quinn  Ute Hentschel  RuAngelie Edrada-Ebel 《Marine drugs》2014,12(3):1220-1244

High resolution Fourier transform mass spectrometry (HRFTMS) and nuclear magnetic resonance (NMR) spectroscopy were employed as complementary metabolomic tools to dereplicate the chemical profile of the new and antitrypanosomally active sponge-associated bacterium Actinokineospora sp. EG49 extract. Principal Component (PCA), hierarchical clustering (HCA), and orthogonal partial least square-discriminant analysis (OPLS-DA) were used to evaluate the HRFTMS and NMR data of crude extracts from four different fermentation approaches. Statistical analysis identified the best culture one-strain-many-compounds (OSMAC) condition and extraction procedure, which was used for the isolation of novel bioactive metabolites. As a result, two new O-glycosylated angucyclines, named actinosporins A (1) and B (2), were isolated from the broth culture of Actinokineospora sp. strain EG49, which was cultivated from the Red Sea sponge Spheciospongia vagabunda. The structures of actinosporins A and B were determined by 1D- and 2D-NMR techniques, as well as high resolution tandem mass spectrometry. Testing for antiparasitic properties showed that actinosporin A exhibited activity against Trypanosoma brucei brucei with an IC₅₀ value of 15 µM; however no activity was detected against Leishmania major and Plasmodium falciparum, therefore suggesting its selectivity against the parasite Trypanosoma brucei brucei; the causative agent of sleeping sickness.  相似文献   

Missing mass in collisional debris from galaxies     

Bournaud F  Duc PA  Brinks E  Boquien M  Amram P  Lisenfeld U  Koribalski BS  Walter F  Charmandaris V 《Science (New York, N.Y.)》2007,316(5828):1166-1169

Recycled dwarf galaxies can form in the collisional debris of massive galaxies. Theoretical models predict that, contrary to classical galaxies, these recycled galaxies should be free of nonbaryonic dark matter. By analyzing the observed gas kinematics of such recycled galaxies with the help of a numerical model, we demonstrate that they do contain a massive dark component amounting to about twice the visible matter. Staying within the standard cosmological framework, this result most likely indicates the presence of large amounts of unseen, presumably cold, molecular gas. This additional mass should be present in the disks of their progenitor spiral galaxies, accounting for a substantial part of the so-called missing baryons.  相似文献