Search Results - (Author, Cooperation:S. Lenk)
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1K. G. Lloyd ; L. Schreiber ; D. G. Petersen ; K. U. Kjeldsen ; M. A. Lever ; A. D. Steen ; R. Stepanauskas ; M. Richter ; S. Kleindienst ; S. Lenk ; A. Schramm ; B. B. Jorgensen
Nature Publishing Group (NPG)
Published 2013Staff ViewPublication Date: 2013-03-29Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Adhesins, Bacterial/metabolism ; Archaea/classification/enzymology/genetics/*metabolism ; Cysteine Endopeptidases/metabolism ; Geologic Sediments/chemistry/*microbiology ; Marine Biology ; Molecular Sequence Data ; Peptide Hydrolases/*metabolism ; Phylogeny ; Proteolysis ; RNA, Ribosomal, 16S/genetics ; Single-Cell AnalysisPublished by: -
2Rafols-Ribe, J., Will, P.-A., Hänisch, C., Gonzalez-Silveira, M., Lenk, S., Rodriguez-Viejo, J., Reineke, S.
American Association for the Advancement of Science (AAAS)
Published 2018Staff ViewPublication Date: 2018-05-26Publisher: American Association for the Advancement of Science (AAAS)Electronic ISSN: 2375-2548Topics: Natural Sciences in GeneralPublished by: -
3Kluth, P. ; Zhao, Q. T. ; Winnerl, S. ; Lenk, S. ; Mantl, S.
Woodbury, NY : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: We have developed a method for fabricating epitaxial CoSi2 nanowires using only conventional optical lithography and standard silicon processing steps. This method was successfully applied to ultrathin epitaxial CoSi2 layers grown on Si(100) and silicon-on-insulator substrates. A nitride mask induces a stress field near its edges into the CoSi2/Si heterostructure and leads to the separation of the CoSi2 layer in this region during a rapid thermal oxidation step. A subsequent etching step and a second oxidation generate highly homogenous silicide wires with dimensions down to 50 nm. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
4Staff View
ISSN: 1436-2449Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyMechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsNotes: Summary Viscosity measurements are reported for syndiotactic polystyrenes in a molar mass range from 35,000 to 400,000 g/mol and standard fractions of narrowly distributed atactic polystyrenes in a molar mass range from 50,000 to 600,000 g/mol in trichlorobenzene at 135 °C. The correlation between molar mass and intrinsic viscosity of different polystyrene samples was investigated as well as their solution properties. The results demonstrate that the intrinsic viscosity of polystyrene in thermodynamically good solvents is independent of the type of tacticity of the polystyrenes investigated here. The dilute solution properties were compared with those for isotactic and atactic polystyrenes. The small differences in their solution viscosities may occur due to the different molar mass distributions of differently synthesized samples.Type of Medium: Electronic ResourceURL: -
5Staff View
ISSN: 1434-0879Keywords: Calcium oxalate urolithiasis ; Texture examination ; Polarising microscopy ; Hypercalciuria ; Hyperuricosuria ; MetaphylaxisSource: Springer Online Journal Archives 1860-2000Topics: MedicineNotes: Summary Texture examinations were made on 416 thin section and on 1,000 grain preparations of calcium oxalate calculi. The frequency of occurrence of four basic texture types in relation to pathological urine parameters, age and sex of the patients as well as types of stone removal are discussed. Percentage share of texture type I that correlates to hyperuricosuria shows a steady increase with increasing age. The proportions of types III and IV that are linked to hypercalciuria decrease with increasing age. The examinations show the feasibility of texture-type determinations within routine stone analysis and create the precondition for texture types to be included in metaphylaxis of calcium oxalate lithiasis.Type of Medium: Electronic ResourceURL: -
6Staff View
ISSN: 1434-0879Keywords: Urogenital tuberculosis ; Urolithiasis ; Texture of calculiSource: Springer Online Journal Archives 1860-2000Topics: MedicineNotes: Summary Of 628 patients with bacteriologicaly or histologicaly proven urogenital tuberculosis (UGT) treated from 1960 to 1985. 126 patients (20.1%) had additional urinary tract infection and 66 patients (10.5%) developed urolithiasis. In these 66 patients a simultaneous urinary tract infection occured in 29 cases (43.9%). Twenty-eight calculi were analyzed by a combined crystal-optical and x-ray-diffraction method. A high incidence of struvite/carbonate apatite calculi (11/28) as well as of calcium phosphate calculi (6/28) was found. The texture of 15 calculi was investigated on thin sections by polarization microscopy and a high concentration of organic material was found in both calcium oxalate and struvite/carbonate apatite calculi probably due to the specific and nonspecific infection with deposition of cell and protein degradation products.Type of Medium: Electronic ResourceURL: -
7Staff View
ISSN: 1573-2584Source: Springer Online Journal Archives 1860-2000Topics: MedicineNotes: Abstract A resigning attitude in respect to patients suffering from nephrolithiasis and manifest renal failure is not justified anymore in view of the advances in diagnosis and therapy. During the period 1964–1975, at the urological clinic of the hospital Friedrichshain 188 patients suffering from nephrolithiasis and renal failure have been treated: 120 surgically and 68 conservatively. The operative-therapeutical conception is outlined. The pre- and postoperative hemodialysis according to the stage of renal failure are elaborated. Tabulated data demonstrate the fate of all surgically treated patients.Type of Medium: Electronic ResourceURL: -
8Aplin, A. ; Jasionowski, T. ; Tuttle, D. L. ; Lenk, S. E. ; Dunn, W. A.
New York, NY [u.a.] : Wiley-Blackwell
Published 1992Staff ViewISSN: 0021-9541Keywords: Life and Medical Sciences ; Cell & Developmental BiologySource: Wiley InterScience Backfile Collection 1832-2000Topics: BiologyMedicineNotes: We evaluated the role of cytoskeletal elements in the degradation of endogenous proteins via autophgy using biochemical and morphological techniques. In the absence of exogenous amino acids, degradation of endogenous proteins was enhanced in cultured normal rat kidney cells. This enhanced degradative state was accompanied by a 4-fold increase in the occurrence of autophagic vacuoles. In the presence of drugs that induce the depolymerization of microfilaments (cytochalasins B and D) or microtubules (nocodazole), protein degradation was not enhanced in nutrient-deprived cells. Although these drugs had similar inhibitory effects on the protein degradation, their effect on autophagy differed. Cytochalasins B and D interfered with the formation of the autophagosome. In cells treated with these drugs, the fractional volume represented by autophagic vaculoes was not substantially increased despite nutrient depletion. On the contrary, nocodazole appeared to have no effect on the formation of autophagosomes. Instead, this drug suppressed the delivery of hydrolytic enzymes, thereby resulting in an accumulation of acidic autophagic vacuoles containing undegraded cellular components. © 1992 Wiley-Liss, Inc.Additional Material: 6 Ill.Type of Medium: Electronic ResourceURL: