Citations per year, relative to Karl Speer Karl Speer (= 1×)
peers
Jeong‐Heui Choi
Countries citing papers authored by Karl Speer
Since
Specialization
Citations
This map shows the geographic impact of Karl Speer's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Karl Speer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karl Speer more than expected).
This network shows the impact of papers produced by Karl Speer. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Karl Speer. The network helps show where Karl Speer may publish in the future.
Co-authorship network of co-authors of Karl Speer
This figure shows the co-authorship network connecting the top 25 collaborators of Karl Speer.
A scholar is included among the top collaborators of Karl Speer based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Karl Speer. Karl Speer is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Schwägele, Fredi, et al.. (2013). PAH contents in smoked meat products - influence of different types of wood and smoking spices on the contents of polycyclic aromatic hydrocarbons (PAH) and phenolic substances.. Die Fleischwirtschaft. 93(1). 92–97.3 indexed citations
Speer, Karl, et al.. (2009). Degradation products of carboxylic acid-5-hydroxytryptamides (C-5-HT).. 484–487.1 indexed citations
9.
Speer, Karl, et al.. (2008). Geringere PAK-Gehalte durch optimierte Räucherbedingungen : Einfluss der Raucherzeugung, der Räucherzeit und der Art des Darms auf die PAK-Gehalte in Brühwürsten. Die Fleischwirtschaft. 88(7). 93–97.2 indexed citations
10.
Jira, Wolfgang, et al.. (2008). Einflüsse auf die PAK-Gehalte in geräucherten Fleischerzeugnissen : vergleichende Untersuchungen der PAK-Gehalte in traditionell und mit Flüssigrauch geräucherten Fleischerzeugnissen. Die Fleischwirtschaft. 88(12). 99–102.1 indexed citations
11.
Kölling‐Speer, I., et al.. (2007). Tocopherols in green coffees harvested in different years.. 200–203.6 indexed citations
12.
Jira, Wolfgang, et al.. (2007). Analytik der EFSA-PAK in Fleischerzeugnissen und Gewürzen. Die Fleischwirtschaft. 87(6). 98–103.1 indexed citations
13.
Kölling‐Speer, I., et al.. (2007). Diterpenes in green coffees harvested in different years.. 197–199.4 indexed citations
14.
Jira, Wolfgang, et al.. (2006). Values don't justify high maximum levels : PAH in smoked meat products according to the new EU standards. Fleischwirtschaft international. 11–17.2 indexed citations
15.
Jira, Wolfgang, et al.. (2006). PAK in geräucherten Fleischerzeugnissen : Untersuchungen nach den neuen EU-Anforderungen. Die Fleischwirtschaft. 86(10). 103–106.5 indexed citations
16.
Speer, Karl, et al.. (2006). Die Quantifizierung von Rückständen ausgewählter Herbizide (Diuron, Linuron, Neburon, Propanil und Swep) in Lebensmitteln nach alkalischer Hydrolyse mit Hilfe der GC/MS. Deutsche Lebensmittel-Rundschau. 102(2). 53–57.1 indexed citations
17.
Kölling‐Speer, I., et al.. (2005). Chromatography of carbonic acid-5-hydroxytryptamides.. 305–308.
18.
Kölling‐Speer, I., et al.. (2005). Effects of controlled storage on the lipid fraction of green Arabica coffee beans.. 161–168.10 indexed citations
19.
Kölling‐Speer, I., et al.. (2005). Two new diterpenes in roasted coffee.. 271–275.2 indexed citations
20.
Speer, Karl, et al.. (1990). Mass spectrometric investigation of off-flavours in orange nectar and fish marinade.. Deutsche Lebensmittel-Rundschau. 86(1). 6–9.2 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.