Search Results - (Author, Cooperation:A. Schiesser)
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1Latest Papers from Table of Contents or Articles in PressDirect determination of absolute molecular stereochemistry in gas phase by Coulomb explosion imagingM. Pitzer ; M. Kunitski ; A. S. Johnson ; T. Jahnke ; H. Sann ; F. Sturm ; L. P. Schmidt ; H. Schmidt-Bocking ; R. Dorner ; J. Stohner ; J. Kiedrowski ; M. Reggelin ; S. Marquardt ; A. Schiesser ; R. Berger ; M. S. Schoffler
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-09-07Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 0006-291XSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 0006-291XSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 0304-4165Keywords: (S. cerevisiae) ; Antioxidant enzyme ; Copper ; Cytochrome oxidase ; Superoxide dismutaseSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyMedicinePhysicsType of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 1574-6968Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyNotes: Abstract Transmission electron microscopy of wheat straw cell wall incubated with Pleurotus ostreatus in the presence of glucose or sunflower oil reveals different degradation patterns. Lower lignin content and increased polyphenol-oxidase activity correspond to peculiar features of the substrate at ultrastructural level. Differentiation between cellulose and lignin degradation by electron microscopy might represent a valuable tool to monitor biological delignification during industrial hydrolysis of ligno-cellulose.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesSchwarz, N. ; Redl, H. ; Schlag, G. ; Lintner, F. ; Dinges, H. P. ; Thurnher, M. ; Schiesser, A.
Springer
Published 1987Staff ViewISSN: 1434-3916Source: Springer Online Journal Archives 1860-2000Topics: MedicineDescription / Table of Contents: Zusammenfassung In einer experimentellen Untersuchung an der Ratte wurden die osteoregenerativen Eigenschaften von Collagen-Apatit (Collapat) geprüft und mit der Osteogenin-Containing-Gelatine abhängigen Osteoinduktion verglichen. Die Prüfsubstanzen wurden orthotop (7 mm ∅ Trepanationsdefekt) und heterotop (paravertebrale Muskulatur, Bauchwand) implantiert. Die Auswertung erfolgte deskriptiv histologisch und enzymatisch quantitativ (alkalische Phosphatase). Collapat bewirkte keine Osteoinduktion im Weichteillager und führte nicht zur Knochendefektheilung, sondern zeigte in allen Fällen ein Fremdköorpergranulationsgewebe ohne Osteogenese. OCG führt zur Knochenneubildung in der Muskulatur innerhalb von drei Wochen, verbunden mit einem signifikanten Anstieg der alkalischen Phosphatase, und zur ausgedehnten Knochenbildung im Trepanationsdefekt innerhalb vier Wochen. Diese Defekte heilten in keinem Fall, wenn keine Substanz implantiert wurde. Der Wert der klinischen Applikation von Collapat erscheint deshalb zweifelhaft; die Osteoinduktion mittels OCG bedarf weiterer experimenteller Untersuchungen.Notes: Summary An experimental study in rats was done to investigate the bone-regenerating properties of collagen apatite (Collapat) and to compare it with osteoinduction dependent on osteogenin-containing gelatine (OCG). The test substances were implanted orthotopically (calvarial defect — 7 mm in diameter) and heterotopically (paravertebral muscles, abdominal muscles). The results were evaluated histologically and enzymatically (alkaline phosphatase). Collapat caused neither osteoinduction in the heterotopic site nor healing of the bone defects. Foreign body reaction without new bone formation was encountered. OCG implantation leads to new bone formation in the muscles within 3 weeks, associated with a significant increase in alkaline phosphatase activity, and to extensive new bone formation in the calvarial defect within 4 weeks. The defects did not heal if left empty. The value of clinical application of Collapat appears to be doubtful. Osteoinduction with OCG requires further experimental investigation.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 1432-0614Source: Springer Online Journal Archives 1860-2000Topics: BiologyProcess Engineering, Biotechnology, Nutrition TechnologyNotes: Abstract Pseudomonas fluorescens BF13 is especially capable of promoting the formation of vanillic acid during ferulic acid degradation. We studied the possibility of enhancing the formation of this intermediary metabolite by using suspensions of cells at high density. The bioconversion of ferulic into vanillic acid was affected by several parameters, such as the concentration of the biomass, the amount of ferulic acid that was treated, the carbon source on which the biomass was grown. The optimal yield of vanillic acid was obtained with 6 mg/ml cells pre-grown on p-coumaric acid and 2 mg/ml ferulic acid. Under these conditions the bioconversion rate was 95% in 5 h. Therefore BF13 strain represents a valid biocatalyst for the preparative synthesis of vanillic acid.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 1420-9071Source: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Summary An organism has been isolated through enrichment cultures a 40°C which could convert digitonin into a substance or a complex of substances having a melting point between 263°C and 275°C. It is not soluble in water, devoided of hemolytic activity, antihemolytic with regard to digitonin itself; it prevents hemolysis due to low osmotic pressure and specific hemolysis due to hemolytic serum. This attack is only partial, since digitonin is partially linked with the substance which precipitates through the action of the organism. From these two substances a compound results, probably a digitonide, which cannot be attacked anymore by the organism.Type of Medium: Electronic ResourceURL: