@article{JildehKirchnerOberlaenderetal.2017, author = {Jildeh, Zaid B. and Kirchner, Patrick and Oberl{\"a}nder, Jan and Kremers, Alexander and Wagner, Torsten and Wagner, Patrick H. and Sch{\"o}ning, Michael Josef}, title = {FEM-based modeling of a calorimetric gas sensor for hydrogen peroxide monitoring}, series = {physica status solidi a : applications and materials sciences}, journal = {physica status solidi a : applications and materials sciences}, number = {Early View}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1862-6319}, doi = {10.1002/pssa.201600912}, year = {2017}, abstract = {A physically coupled finite element method (FEM) model is developed to study the response behavior of a calorimetric gas sensor. The modeled sensor serves as a monitoring device of the concentration of gaseous hydrogen peroxide (H2 O2) in a high temperature mixture stream in aseptic sterilization processes. The principle of operation of a calorimetric H2 O2 sensor is analyzed and the results of the numerical model have been validated by using previously published sensor experiments. The deviation in the results between the FEM model and experimental data are presented and discussed.}, language = {en} } @article{JildehKirchnerBaltesetal.2019, author = {Jildeh, Zaid B. and Kirchner, Patrick and Baltes, Klaus and Wagner, Patrick H. and Sch{\"o}ning, Michael Josef}, title = {Development of an in-line evaporation unit for the production of gas mixtures containing hydrogen peroxide - numerical modeling and experimental results}, series = {International Journal of Heat and Mass Transfer}, volume = {143}, journal = {International Journal of Heat and Mass Transfer}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0017-9310}, doi = {10.1016/j.ijheatmasstransfer.2019.118519}, pages = {Article number 118519}, year = {2019}, abstract = {Hydrogen peroxide (H2O2) is a typical surface sterilization agent for packaging materials used in the pharmaceutical, food and beverage industries. We use the finite-elements method to analyze the conceptual design of an in-line thermal evaporation unit to produce a heated gas mixture of air and evaporated H2O2 solution. For the numerical model, the required phase-transition variables of pure H2O2 solution and of the aerosol mixture are acquired from vapor-liquid equilibrium (VLE) diagrams derived from vapor-pressure formulations. This work combines homogeneous single-phase turbulent flow with heat-transfer physics to describe the operation of the evaporation unit. We introduce the apparent heat-capacity concept to approximate the non-isothermal phase-transition process of the H2O2-containing aerosol. Empirical and analytical functions are defined to represent the temperature- and pressure-dependent material properties of the aqueous H2O2 solution, the aerosol and the gas mixture. To validate the numerical model, the simulation results are compared to experimental data on the heating power required to produce the gas mixture. This shows good agreement with the deviations below 10\%. Experimental observations on the formation of deposits due to the evaporation of stabilized H2O2 solution fits the prediction made from simulation results.}, language = {en} } @article{JerominZoor2008, author = {Jeromin, G{\"u}nter Erich and Zoor, Annegreth}, title = {A new irreversible enzyme-aided esterification method in organic solvents}, series = {Biotechnology letters. 30 (2008), H. 5}, journal = {Biotechnology letters. 30 (2008), H. 5}, isbn = {1573-6776}, pages = {925 -- 928}, year = {2008}, language = {en} } @article{JerominWelsch1995, author = {Jeromin, G{\"u}nter Erich and Welsch, Volker}, title = {Diketene a New Esterification Reagent in the Enzyme-Aided Synthesis of Chiral Alcohols and Chiral Acetoacetic Acid Esters}, series = {Tetrahedron Letters . 36 (1995), H. 37}, journal = {Tetrahedron Letters . 36 (1995), H. 37}, isbn = {0040-4039}, pages = {6663 -- 6664}, year = {1995}, language = {en} } @article{JerominWeise1990, author = {Jeromin, G{\"u}nter Erich and Weise, Sven}, title = {Enzymatische Acetylierung von (±)-1-Phthalimido-2-propanol}, series = {Liebigs Annalen der Chemie (1990)}, journal = {Liebigs Annalen der Chemie (1990)}, isbn = {0947-3440}, pages = {1045 -- 1046}, year = {1990}, language = {de} } @article{JerominScheidt1991, author = {Jeromin, G{\"u}nter Erich and Scheidt, Annette}, title = {Aliphatic optically active alcohols by enzyme-aided synthesis}, series = {Tetrahedron Letters . 32 (1991), H. 48}, journal = {Tetrahedron Letters . 32 (1991), H. 48}, isbn = {0040-4039}, pages = {7021 -- 7024}, year = {1991}, language = {en} } @article{JerominAlbertz1992, author = {Jeromin, G{\"u}nter Erich and Albertz, Michael}, title = {Optically active \&\#945;-acetoxycarboxylic acids and \&\#945;-hydroxycarboxylic acids by enzyme-aided syntheses}, series = {Journal f{\"u}r Praktische Chemie / Chemiker-Zeitung. 334 (1992), H. 6}, journal = {Journal f{\"u}r Praktische Chemie / Chemiker-Zeitung. 334 (1992), H. 6}, isbn = {1436-9966}, pages = {526 -- 528}, year = {1992}, language = {en} } @article{Jeromin2009, author = {Jeromin, G{\"u}nter Erich}, title = {Superabsorbed alcohol dehydrogenase—a new catalyst for asymmetric reductions}, series = {Biotechnology Letters. 31 (2009), H. 11}, journal = {Biotechnology Letters. 31 (2009), H. 11}, isbn = {0141-5492}, pages = {1717 -- 1721}, year = {2009}, language = {en} } @article{Jeromin2001, author = {Jeromin, G{\"u}nter Erich}, title = {Tetrabenzo[a,c,h,j]phenoxazine-18-yl a new stable neutral radical}, series = {Tetrahedron Letters . 42 (2001), H. 10}, journal = {Tetrahedron Letters . 42 (2001), H. 10}, isbn = {0040-4039}, pages = {1863 -- 1865}, year = {2001}, language = {en} } @article{JensKaldenhoffKirschnerHermannsetal.2014, author = {Jens, Otto and Kaldenhoff, E. and Kirschner-Hermanns, R. and M{\"u}hl, Thomas and Klinge, Uwe}, title = {Elongation of textile pelvic floor implants under load is related to complete loss of effective porosity, thereby favoring incorporation in scar plates}, series = {Journal of biomedical materials research. Part A}, volume = {102}, journal = {Journal of biomedical materials research. Part A}, number = {4}, publisher = {Wiley}, address = {New York}, issn = {1552-4965}, doi = {10.1002/jbm.a.34767}, pages = {1079 -- 1084}, year = {2014}, abstract = {Use of textile structures for reinforcement of pelvic floor structures has to consider mechanical forces to the implant, which are quite different to the tension free conditions of the abdominal wall. Thus, biomechanical analysis of textile devices has to include the impact of strain on stretchability and effective porosity. Prolift® and Prolift + M®, developed for tension free conditions, were tested by measuring stretchability and effective porosity applying mechanical strain. For comparison, we used Dynamesh-PR4®, which was designed for pelvic floor repair to withstand mechanical strain. Prolift® at rest showed moderate porosity with little stretchability but complete loss of effective porosity at strain of 4.9 N/cm. Prolift + M® revealed an increased porosity at rest, but at strain showed high stretchability, with subsequent loss of effective porosity at strain of 2.5 N/cm. Dynamesh PR4® preserved its high porosity even under strain, but as consequence of limited stretchability. Though in tension free conditions Prolift® and Prolift + M® can be considered as large pore class I meshes, application of mechanical strain rapidly lead to collapse of pores. The loss of porosity at mechanical stress can be prevented by constructions with high structural stability. Assessment of porosity under strain was found helpful to define requirements for pelvic floor devices. Clinical studies have to prove whether devices with high porosity as well as high structural stability can improve the patients' outcome.}, language = {en} }