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Your search keyword '"Heinz, Markus"' showing total 114 results
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114 results on '"Heinz, Markus"'

3. Synthesis and photo‐initiated radical polymerization of methacrylates derived from bio‐based ω‐hydroxycarboxylic acids.

Author

Heinz, Markus, Kepkow, Maximilian, Strehmel, Bernd, and Strehmel, Veronika

Subjects
STEARIC acid, CORK oak, EUROPEAN white birch, CRYSTAL structure, FREE radicals
Abstract

The bio‐based methacrylates 9‐(methacryloyloxy)‐10,18‐dihydroxyoctadecanoic acid/9,18‐dihydroxy‐10‐(methacryloyloxy)octadecanoic acid isomer mixture and 22‐methacryloyloxydocosanoic acid were synthesized from 9,10‐epoxy‐18‐hydroxyoctadecanoic acid and 22‐hydroxydocosanoic acid. The white crystalline 9,10‐epoxy‐18‐hydroxyoctadecanoic acid and cream‐colored 22‐hydroxydocosanoic acid were isolated from both the bark of Betula pendula and cork of Quercus suber after extraction of the milled plant materials with methanol, treating the insoluble residues with 2‐propanole containing suspended sodium hydroxide, application of a working up procedure developed in this work for the resulting mixture, and purification of the products obtained. The new bio‐based methacrylates show higher reactivity in the photoinitiated polymerization in comparison with the commercial laurylmethacrylate as detected by photo‐differential scanning calorimetry (DSC). For comparison, traditional free radical polymerization of the new bio‐based methacrylates was carried out in dimethylsulfoxide using 2,2'‐azobis‐(2‐propionitrile) as initiator. Furthermore, the quantitative conversion of the bio‐based monomers during the photoinitiated polymerization makes these bio‐based monomers interesting for application in coatings. As expected, the photopolymer made from the 9‐(methacryloyloxy)‐10,18‐dihydroxyoctadecanoic acid/9,18‐dihydroxy‐10‐(methacryloyloxy)octadecanoic acid isomer mixture is amorphous. Interestingly, the photopolymer made from the 22‐methacryloyloxydocosanoic acid contains crystalline structures as detected by DSC investigation. [ABSTRACT FROM AUTHOR]

Published
2024
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4. A Rule-based Model for Customized Risk Identification in Distributed Software Development Projects

Author

Lamersdorf, Ansgar, Münch, Jürgen, Torre, Alicia Fernández-del Viso, Sánchez, Carlos Rebate, Heinz, Markus, and Rombach, Dieter

Subjects
Computer Science - Software Engineering
Abstract

Many project risks in distributed software development are very different from the ones in collocated development and therefore are often overlooked. At the same time, they depend to a large extent on project-specific characteristics. This article presents a model for identifying risks early in a project. This model systematically captures experiences from past projects and is based on a set of logical rules describing how project characteristics influence typical risks in distributed development. Thus, the model is able to assess risks individually for each project. It was developed by applying qualitative content analysis to 19 interviews with practitioners. An evaluation using expert interviews showed that the risks identified by the model matched the actual experiences in 81% of the cases; of these, 40% have not been regarded yet at project start. The article describes the concepts of the model, its instantiation and evaluation, followed by a conclusion and future work., Comment: 10 pages. The final publication is available at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=5581511

Published
2014
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20. Inhalt

Author

Klose, Gernot, primary and Heinz, Markus, additional

Published
2020
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47. Industry first experiments break the mould for the vaporised hydrogen peroxide decontamination of RTU vials: Syntegon and Stevanato Group present new possibilities for small batch manufacturing

Author

Heinz, Markus and Bertacchini, Fabio

Subjects
Hydrogen peroxide, Pharmaceutical industry, Business, Chemicals, plastics and rubber industries, Engineering and manufacturing industries, Business, international
Abstract

Ready-to-use (RTU) containers are gaining momentum in pharmaceutical operations. However, many drug manufacturers are still looking for the optimal method to transfer presterilised containers into the fill-finish area of a [...]

Published
2023

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