A5045632126- Metal Extraction and Bioleaching
- Occupational exposure and asthma
- Plant Pathogens and Fungal Diseases
- Bacterial Identification and Susceptibility Testing
- Advanced Chemical Sensor Technologies
- Analytical chemistry methods development
- Microbial bioremediation and biosurfactants
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Indoor Air Quality and Microbial Exposure
- Fermentation and Sensory Analysis
- Marine Biology and Ecology Research
- Recycling and Waste Management Techniques
- Isotope Analysis in Ecology
- Anaerobic Digestion and Biogas Production
- Species Distribution and Climate Change
- Orthopaedic implants and arthroplasty
- Microbial Fuel Cells and Bioremediation
- Molecular Sensors and Ion Detection
- Environmental and Industrial Safety
- Biofuel production and bioconversion
- Genomics and Phylogenetic Studies
- Yeasts and Rust Fungi Studies
- Yersinia bacterium, plague, ectoparasites research
- biodegradable polymer synthesis and properties
Leibniz-Institut für Werkstofforientierte Technologien - IWT
2001-2024
Institute for Materials Testing and Materials Technology Dr. Neubert
2014-2015
Institute for Applied Systems Technology Bremen
2014-2015
University of Bremen
1995-1999
Abstract Lemna sect. Uninerves Hegelm. consists of three species, minuta Kunth (synonym L. minuscula ), valdiviana Phil. and yungensis Landolt. was discovered growing on rocks in the Yungas Bolivia by E. Landolt described just 20 years ago. In original description, reported that this species is closely related to it difficult distinguish a morphological basis. Therefore, taxonomic position status remained controversial. Here, we carried out detailed study, integrating approaches include...
Two Gram-negative, rod-shaped, non-spore-forming bacteria, isolated from metal working fluids were investigated to determine their taxonomic positions. On the basis of 16S rRNA gene sequence phylogeny, both strains (MPA 1113(T) and MPA 1105(T)) formed a distinct cluster with 97.7 % similarity between them, which was in vicinity members genera Methylobacterium, Camelimonas, Chelatococcus, Bosea, Salinarimonas Microvirga they showed low similarities (below 94 %). The predominant compounds...
Most of the several billion liters metalworking fluid (MWF) used worldwide and annually are water-based thus prone to a microbial contamination. The growth leads deterioration therefore loss quality technical performance. In most cases, biocides, which pose potential risk health environment, reduce load. To avoid these limitations, paradigm shift using microorganisms in positive way manufacturing process as lubricant is investigated this paper. Some able synthesize equivalent MWF components...
Abstract Anaerobic sulphide oxidation in the light was studied with seven cyanobacterial strains isolated from southern Baltic Sea. All oxidized (1.2-3.5 mM) stoichio-metrically to thiosulphate. No elemental sulphur could be detected as end product of anoxy-genic photosynthesis. Sulphite intermediate compound released into growth medium during anaerobic by these cyanobacteria. The formation sulphite inhibited photosynthesis inhibitor DCMU. cyanobacterium Oscillatoria sp. strain BO 32...
Oenococcus oeni is the most important lactic acid bacterium during vinification and frequently used as a commercial starter culture for malolactic fermentation. Since different strains exhibit high heterogeneity concerning wine-related physiological characteristics, reliable methods their differentiation at strain level are needed, especially development of cultures. Microbial identification by using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS)...
The marine purple non-sulphur bacterium Rhodovulum euryhalinum strain DSM 4868 reduced dimethyl sulphoxide (DMSO) to sulphide (DMS) chemotrophically with as electron donor. oxidation of was correlated the formation polysulphides. R. DMSO phototrophically well, but amount in relation oxidized lower. green sulphur Chlorobium vibrioforme 8327 DMS and thiosulphate donors. extent reduction much less dark. Eight strains bacteria - marine, brackish water freshwater isolates another showed a very...
The deterioration of metal working fluids (MWFs) due to the microbial colonization and degradation is a considerable economic factor in industry.Microorganisms (MO) are able metabolize almost all components MWFs thus lead loss its function by reduction or depletion additives.Microbial growth cannot be avoided completely, although various methods exist reduce bacterial load MWFs.This paper presents study on bacteria fungi an industrial environment.The cooling lubricants have been periodically...
In the eulittoral zone of Hiddensee Island (southern coast Baltic Sea) abiotic parameters, especially oxygen and sulfide concentrations in sediment, structure distribution macrozoobenthic community were investigated during four sampling periods 1992. following year, anoxia high sulfidic conditions generated experimentally by covering sediment surface with dark PVC-foils. Changes oxygen, microprofiles, as well response cyanobacterial communities studied continuously over two weeks. One final...
Kurzfassung Kühlschmierstoffe (KSS) sind ein meist unverzichtbarer Bestandteil in der metallbearbeitenden Fertigung. Die chemische Zusammensetzung sowie Befall durch Mikroorganismen führen jedoch zu Limitationen bei deren Einsatz. Da bestimmte Zellbestandteile von Äquivalente konventionellen KSS-Bestandteilen darstellen, besteht die Möglichkeit diese gezielt als KSS-Ersatz nutzen. Aufgrund des Neuheitsgrades dieses Paradigmenwechsels Wirkmechanismen mikrobiell basierter KSS noch völlig...
Qingshengfania soli DSM 103870T was compared with Pseudochelatococcus lubricantis MPA 1113T to clarify the taxonomic relationship of both species because their high phylogenetic relationship. 16S rRNA gene sequence comparisons demonstrated that these share 100 % similarity. Investigation fatty acid patterns, substrate utilization, and matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) profiles displayed no striking differences between type strains species. DNA-DNA...
Many machining operations e.g. turning, milling or grinding are dependent on the application of water-based metalworking fluids (MWF) which contribute significantly to their high level performance. MWF in-use exposed a microbial contamination, leads deterioration components and can cause premature failure whole coolant system. Expensive monitoring addition biocides needed maintain quality reduce load, regardless potential risk for health environment. To overcome these limitations, paradigm...
Abstract Metalworking fluids (MWF) are used routinely throughout the world as cooling and lubricating agent for metal-cutting processes. They important components to maintain quality precision of but slowly consumed within this process. Hence, monitoring ageing MWFs before depletion is economical, ecological security reasons. A method presented, which enables estimate tools by measuring microbial volatile outcome (MVOC) MWF. Measurements done headspace sorptive extraction combined thermal...