A5025101469- Plant Pathogenic Bacteria Studies
- Plant-Microbe Interactions and Immunity
- Legume Nitrogen Fixing Symbiosis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Plant Pathogens and Fungal Diseases
- Food Chemistry and Fat Analysis
- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Cocoa and Sweet Potato Agronomy
- Proteins in Food Systems
- Marine and coastal ecosystems
- Polyoxometalates: Synthesis and Applications
- Biochemical Analysis and Sensing Techniques
- Photosynthetic Processes and Mechanisms
- Essential Oils and Antimicrobial Activity
- Metal-Organic Frameworks: Synthesis and Applications
- Diatoms and Algae Research
- Organoboron and organosilicon chemistry
- Vanadium and Halogenation Chemistry
- Plant Parasitism and Resistance
- Bioactive Natural Diterpenoids Research
- Coordination Chemistry and Organometallics
- Crystallography and molecular interactions
- Organometallic Complex Synthesis and Catalysis
Constructor University
2015-2024
University Hospital Augsburg
2022
Evonik (Germany)
2016-2022
Smart Material (Germany)
2022
Google (United States)
2018
University of Bremen
2004-2016
San Diego State University
2012
University of Toronto
2008-2011
University of Münster
2005-2010
Bielefeld University
2010
In 2006, our group reported the first metal-free systems that reversibly activate hydrogen. This finding was extended to discovery of "frustrated Lewis pair" (FLP) catalysts for hydrogenation. It is this catalysis focal point article. The development and applications such FLP hydrogenation are reviewed, some previously unpublished data reported. scope substrates expanded. Optimal conditions functional tolerance considered applied targets potential commercial significance. Recent developments...
Ocean Sampling Day was initiated by the EU-funded Micro B3 (Marine Microbial Biodiversity, Bioinformatics, Biotechnology) project to obtain a snapshot of marine microbial biodiversity and function world's oceans. It is simultaneous global mega-sequencing campaign aiming generate largest standardized data set in single day. This will be achievable only through coordinated efforts an Consortium, supportive partnerships networks between sites. commentary outlines establishment, aims Consortium...
The combination of the borane B(p-C(6)F(4)H)(3) and (o-C(6)H(4)Me)(3)P activates H(2) to give [(o-C(6)H(4)Me)(3)PH][HB(p-C(6)F(4)H)(3)]. This salt when placed under vacuum releases at room temperature.
The enterobacterium Erwinia amylovora causes fire blight on members of the family Rosaceae, with economic importance apple and pear. During pathogenesis, bacterium is exposed to a variety plant-borne antimicrobial compounds. In plants many constitutively synthesized isoflavonoids affecting microorganisms were identified. Bacterial multidrug efflux transporters which mediate resistance toward structurally unrelated compounds might confer tolerance these phytoalexins. To prove this hypothesis,...
Exopolysaccharides (EPSs) play important roles in the attachment of bacterial cells to a surface and/or building and maintaining three-dimensional, complex structure biofilms. To elucidate spatial distribution function EPSs levan alginate during biofilm formation, biofilms Pseudomonas syringae strains with different EPS patterns were compared. The mucoid strain PG4180.muc, which produces alginate, its levan- alginate-deficient derivatives all formed wells microtitre plates flow chambers....
Production of the chlorosis-inducing phytotoxin coronatine in Pseudomonas syringae pathovars atropurpurea, glycinea, maculicola, morsprunorum, and tomato has been previously reported. DNA hybridization studies indicated that biosynthetic gene cluster is highly conserved among P. strains which produce toxin. In present study, two 17-bp oligonucleotide primers derived from pv. glycinea PG4180 were investigated for their ability to detect coronatine-producing by PCR analysis. The primer set...
Reactions of a frustrated Lewis pair composed sterically encumbered phosphine and borane are shown to react with 1,3-dienes give the 1,4-addition products.
The reaction of tBu2PH and B(p-C6F4H)3 in THF afforded tBu2(H)P(CH2)4OB(p-C6F4H)3 (1). Similarly, reactions N-bases with a solution B(C6F5)3 led to the formation THF-ring-opening products C5H3Me2N(CH2)4OB(C6F5)3 (2), C6H5CH2NMe2(CH2)4OB(C6F5)3 (3), Me2NC6H4NMe2(CH2)4OB(C6F5)3 (4). also occurs aliphatic amines form compounds Me3N(CH2)4OB(C6F5)3 (5), Et3N(CH2)4OB(C6F5)3 (6), Me2N(CH2)2NMe2(CH2)4OB(C6F5)3 (7), tBuHN(CH2)2NHtBu(CH2)4OB(C6F5)3 (8). In related chemistry, B(C6F5)3, 1,4-dioxane,...
The Grignard reagent (p-C6F4H)MgCl was used to prepare (Et2O)B(p-C6F4H)3 (2) and the free borane B(p-C6F4H)3 (1). On basis of Lewis acidity tests, 1 exhibits ca. 95% B(C6F5)3. forms classical adducts with ethers phosphines general formula (L)B(p-C6F4H)3 (L = Et2O (2), THF (3), Me3P (4), Et3P (5), i-Pr2(H)P (6), Ph3P (7), (3,5-Me2C6H3)3P (8), t-Bu2(H)P (9), Cy3P (10)). Compounds 9 10 react 4 atm H2 give salts [t-Bu2PH2][HB(p-C6F4H)3] (11) [Cy3PH][HB(p-C6F4H)3] (12). sterically demanding R3P...
To evaluate a rapid and cost-effective method for monitoring bacteria in ballast water, several marine bacterial isolates were characterized by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS). Since International Maritime Organization (IMO) regulations are concerned with the unintended transportation pathogenic through emphasis was placed on detecting species Vibrio, enterococci coliforms. Seawater samples collected from North Sea incubated steel...
ABSTRACT Alga-bacterium interactions are crucial for aggregate formation and carbon cycling in aquatic systems. To understand the initiation of these interactions, we investigated bacterial chemotaxis within a bilateral model system. Marinobacter adhaerens HP15 has been demonstrated to attach diatom Thalassiosira weissflogii induce transparent exopolymeric particle formation. M. possesses one polar flagellum is highly motile. Bacterial cells were attracted cells, as by addition cell...
Marine diatoms have a higher fucoxanthin content in comparison to macroalgae. Fucoxanthin features many potent bioactive properties, particularly anti-obesity properties. Despite the great potential for harvesting larger amounts of fucoxanthin, impacts light quality (light source, intensity, and photoperiod) on production essential proteins involved biosynthesis marine remain unclear.In present study, Cylindrotheca closterium was selected from four different species based its high...
Biosynthesis of the phytotoxin coronatine (COR) in Pseudomonas syringae pv. glycinea PG4180 is regulated by temperature at transcriptional level. A 3.4-kb DNA fragment from COR biosynthetic gene cluster restored temperature-regulated production to Tn5 mutants defective production. Nucleotide sequence analysis this revealed three genes, corS, corP, and corR, which encode a modified two-component regulatory system consisting one sensor protein, CorS, two response regulator proteins, CorP CorR....
A Gram-negative, motile, rod-shaped bacterial strain, HP15(T), was isolated from aggregates taken surface waters of the German Wadden Sea (German Bight). Of 82 marine isolates, HP15(T) chosen for further study because its high potential to induce production transparent exopolymeric particles and aggregate formation while interacting with diatom Thalassiosira weissflogii. grew optimally at 34-38 °C pH 7.0-8.5, able tolerate salt concentrations 0.5-20% (w/v) NaCl. characterized...
Increasing Transparent Exopolymer Particle (TEP) formation during diatom blooms as a result of elevated temperature and pCO2 have been suggested to in enhanced aggregation carbon flux, therewith potentially increasing the sequestration by ocean. We present experimental results on TEP aggregate Thalassiosira weissflogii (diatom) presence or absence bacteria under two three scenarios. During phase experiment was at higher (20°C vs. 15°C), predicted. However, contrast expectations based...
ABSTRACT Blossoms are important sites of infection for Erwinia amylovora , the causal agent fire blight rosaceous plants. Before entering tissue, pathogen colonizes stigmatic surface and has to compete space nutrient resources within epiphytic community. Several epiphytes capable synthesizing antibiotics with which they antagonize phytopathogenic bacteria. Here, we report that a multidrug efflux transporter, designated NorM, E. confers tolerance toxin(s) produced by bacteria cocolonizing...