Working on the application of nonlinear mixed-effects models to chemical degradation data, it became desirable to further speed up the solution of at least the most common degradation models used in the mkin package, simple first-order (SFO) decline of the parent compound coupled to SFO decline of a metabolite, or …
more ...| 35. | Ranke J, Meinecke S (2019) Error Models for the Kinetic Evaluation of Chemical Degradation Data Environments 6 (12) 124 doi:10.3390/environments6120124 |
| 34. | Ranke J, Wöltjen J, Meinecke S (2018) Comparison of software tools for kinetic evaluation of chemical degradation data Environmental Sciences Europe 30 17 doi:10 … |
| Ranke J (2019) Recent improvements in the definition and identification of error models for chemical degradation data. XVI Symposium on pesticide chemistry 3-5 September, Piacenza, Italy slides (pdf) |
| Ranke J, Coors A, Vollmar P, Riedhammer C (2017) Comparative environmental risk assessment of biocides - a chance to get better products. SETAC … |
Ever since I have read the refresher of Tjalling Jager on differential equations and likelihood functions, I have been irritated about the common way to express the likelihood of data following a normal distribution using the density function of the normal distribution. The statement that made me wonder was …
more ...| Ranke J, Wöltjen J and Meinecke S (2018) Testdatensätze und Gewichtungsverfahren für die Auswertung von Abbaudaten. Umwelt 2018 mit Beiträgen der Fachgruppe Umweltchemie & Ökotoxikologie der GDCh und Society of Environmental Toxicology and Chemistry - German Language Branch, 9-12 September 2018, Münster, Germany, poster (pdf) |
| Ranke J and Lehmann R (2015) To … |
I am happy to announce that the publication on the software comparison of kinetic evaluation software is now available online! As the supporting information containing the numerical results obtained with the test datasets published on the journal website is marked as "Draft", I have prepared a version for publicaton on …
more ...| Ranke J (2010) Scientific concepts and tools for sustainable chemistry as applied to ionic liquids and antifouling biocides, Habilitation thesis, Universität Bremen, PDF for download |
| Ranke J (2002) Ecotoxicological Risk Profiles of Chemicals - Concept and Application to Antifouling Biocides, PhD thesis, Universität Bremen, PDF for download, printed edition available from … |
| Ranke J, Dinkel H, Pichler K (2010) R - ein neues Element für chemische Analysen. Nachrichten aus der Chemie 58 (April 2010) 453-455 |
| Behrend P, Dünne M, Ranke J* (2006) Determination of Irgarol(R) 1051 from small water samples using Stir-Bar Sorptive Extraction TDS-GC-MS for application in multispecies testing. |
| Ranke J … |
This is a short note about reading tables from common office document formats into R.
After problems with large worksheets I have turned to using the readxl package.
require(readxl)
sheet_names <- excel_sheets("my_file.xls")
d <- read_excel("my_file.xls", sheet = 1, range = "A3:C7", col_names = TRUE)
Recently …
more ...Upon finishing some projects, I found the time to update this web server (from Debian wheezy to Debian jessie) and to give the web site a new design.
And after the start of the new year, the translation of the site to German is completed as well.
more ...With great pleasure I am introducing my new company in this little weblog posting. The company is simply called “Johannes Ranke, wissenschaftlicher Berater”. This means I am running a one-man scientific consulting company. Continuing from my activities at the University of Bremen, at Harlan Laboratories and most recently at Eurofins …
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