1,354,073 research outputs found
Biosolar hydrogen as a CO2-free renewable energy source: optimization of protein and electron supply to increase the H2-production rates in green algae
No full textDoebbe A. Biosolar hydrogen as a CO2-free renewable energy source: optimization of protein and electron supply to increase the H2-production rates in green algae. Bielefeld; 2010
Towards a 3D Cell Model of Chlamydomonas reinhardtii (Workshop Abstract)
No full textBiere N, Doebbe A, Rothe N, Huser T, Kruse O, Sommer B. Towards a 3D Cell Model of Chlamydomonas reinhardtii (Workshop Abstract). In: Sommer B, ed. Proceedings of the CELLmicrocosmos neXt workshop. Bielefeld: Bielefeld University; 2014: 9-10
BiPACE 2D – Graph-based multiple alignment for comprehensive two-dimensional gas chromatography–mass spectrometry
No full textHoffmann N, Wilhelm M, Doebbe A, Niehaus K, Stoye J. BiPACE 2D – Graph-based multiple alignment for comprehensive two-dimensional gas chromatography–mass spectrometry. Bioinformatics. 2014;30(7):988-995
Neuartige Siliziumgele zur Einschlussimmobilisierung von Mikroalgen
No full textHomburg SV, Venkanna D, Doebbe A, Kruse O, Patel A. Neuartige Siliziumgele zur Einschlussimmobilisierung von Mikroalgen. In: Special Issue: ProcessNet‐Jahrestagung und 31. DECHEMA‐Jahrestagung der Biotechnologen 2014. Chemie Ingenieur Technik. Vol 86. Wiley; 2014: 1536-1536
Functional analysis of three type-2 DGAT homologue genes for triacylglycerol production in the green microalga Chlamydomonas reinhardtii
No full textLa Russa M, Bogen C, Uhmeyer A, et al. Functional analysis of three type-2 DGAT homologue genes for triacylglycerol production in the green microalga Chlamydomonas reinhardtii. Journal of Biotechnology. 2012;162(1):13-20.Photosynthetic organisms like plants and algae can use sunlight to produce lipids as important metabolic compounds. Plant-derived triacylglycerols (TAGs) are valuable for human and animal nutrition because of their high energy content and are becoming increasingly important for the production of renewable biofuels. Acyl-CoA:diacylglycerol acyltransferases (DGATs) have been demonstrated to play an important role in the accumulation of TAG compounds in higher plants. DGAT homologue genes have been identified in the genome of the green alga Chlamydomonas reinhardtii, however their function in vivo is still unknown. In this work, the three most promising type-2 DGAT candidate genes potentially involved in TAG lipid accumulation (CrDGAT2a, b and c) were investigated by constructing overexpression strains. For each of the genes, three strains were identified which showed enhanced mRNA levels of between 1.7 and 29.1 times that of the wild type (wt). Total lipid contents, neutral lipids and fatty acid profiles were determined and showed that an enhanced mRNA expression level of the investigated DGAT genes did not boost the intracellular TAG accumulation or resulted in alterations of the fatty acid profiles compared to wild type during standard growth condition or during nitrogen or sulfur stress conditions. We conclude that biotechnological efforts to enhance cellular TAG amount in microalgae need further insights into the complex network of lipid biosynthesis to identify potential bottlenecks of neutral lipid production
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Immobilisierung von Chlamydomonas reinhardtii in neuartigen Silizium-Gelen. Proof-of-Principle
No full textMüller C, Hanitzsch M, Doebbe A, Mussgnug JH, Kruse O, Patel A. Immobilisierung von Chlamydomonas reinhardtii in neuartigen Silizium-Gelen. Proof-of-Principle. In: Special Issue: ProcessNet‐Jahrestagung 2012 und 30. Jahrestagung der Biotechnologen. Chemie Ingenieur Technik. Vol 84. Wiley; 2012: 1179-1179
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Synthesis of transparent aminosilane-derived silica based networks for entrapment of sensitive materials
No full textMüller C, Kraushaar K, Doebbe A, et al. Synthesis of transparent aminosilane-derived silica based networks for entrapment of sensitive materials. Chemical Communications. 2013;49(86):10163-10165.A novel sol–gel synthesis route is reported which results in the formation of optically transparent silica based hydro- and xerogels from an aminosilane precursor in aqueous solutions. These materials can be used for
entrapment of microalgae and light-harvesting complex (LHC) samples
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