A. R. Keen

655 total citations
19 papers, 512 citations indexed

About

A. R. Keen is a scholar working on Food Science, Process Chemistry and Technology and Animal Science and Zoology. According to data from OpenAlex, A. R. Keen has authored 19 papers receiving a total of 512 indexed citations (citations by other indexed papers that have themselves been cited), including 8 papers in Food Science, 5 papers in Process Chemistry and Technology and 4 papers in Animal Science and Zoology. Recurrent topics in A. R. Keen's work include Probiotics and Fermented Foods (7 papers), Odor and Emission Control Technologies (5 papers) and Meat and Animal Product Quality (3 papers). A. R. Keen is often cited by papers focused on Probiotics and Fermented Foods (7 papers), Odor and Emission Control Technologies (5 papers) and Meat and Animal Product Quality (3 papers). A. R. Keen collaborates with scholars based in Netherlands, Hungary and United Kingdom. A. R. Keen's co-authors include M.W.A. Verstegen, A.J.A. Aarnink, Andreas Berg, H. Valk, A. Elzing, M.C.J. Smits, Juul Achten, R.M. de Mol, J.H.M. Metz and L. Speelman and has published in prestigious journals such as Analytical Biochemistry, Journal of Medical Internet Research and Computers and Electronics in Agriculture.

In The Last Decade

A. R. Keen

19 papers receiving 417 citations

Peers

A. R. Keen

PCT

ASZ

ACS

Theo van Kempen United States

A. Cerisuelo Spain

E. F. Wheeler United States

K. B. Kephart United States

D.J. Burnham United States

Angelika Haeussermann Germany

T.T. Canh Netherlands

R.M. Kay United Kingdom

D. L. Rutley Australia

J.D. Davis United States

Theo van Kempen United States

A. R. Keen

99 ×0.5

PCT

308 ×1.8

ASZ

45 ×0.3

78 ×0.7

48 ×0.5

ACS

Citations per year, relative to A. R. Keen A. R. Keen (= 1×) peers Theo van Kempen

Countries citing papers authored by A. R. Keen

Since Specialization

Citations

This map shows the geographic impact of A. R. Keen'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 A. R. Keen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. R. Keen more than expected).

Fields of papers citing papers by A. R. Keen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. R. Keen. 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 A. R. Keen. The network helps show where A. R. Keen may publish in the future.

Co-authorship network of co-authors of A. R. Keen

This figure shows the co-authorship network connecting the top 25 collaborators of A. R. Keen. A scholar is included among the top collaborators of A. R. Keen 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 A. R. Keen. A. R. Keen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

19 of 19 papers shown

Rzewuska, Magdalena, et al.. (2024). Implementation of a Web-Based Outpatient Asynchronous Consultation Service: Mixed Methods Study. Journal of Medical Internet Research. 26. e48092–e48092. 2 indexed citations

Mol, R.M. de, et al.. (1999). Description of a detection model for oestrus and diseases in dairy cattle based on time series analysis combined with a Kalman filter. Computers and Electronics in Agriculture. 22(2-3). 171–185. 71 indexed citations

Keen, A. R., et al.. (1996). The effects on non-attendance and early discontinuation of enclosing an information leaflet to prospective clients for clinical psychology. Clinical Psychology Forum. 1(96). 33–35. 5 indexed citations

Aarnink, A.J.A., et al.. (1996). Effect of Slatted Floor Area on Ammonia Emission and on the Excretory and Lying Behaviour of Growing Pigs. Journal of Agricultural Engineering Research. 64(4). 299–310. 119 indexed citations

Smits, M.C.J., H. Valk, A. Elzing, & A. R. Keen. (1995). Effect of protein nutrition on ammonia emission from a cubicle house for dairy cattle. Livestock Production Science. 44(2). 147–156. 80 indexed citations

Koerkamp, P.W.G. Groot, et al.. (1995). The effect of manure and litter handling and indoor climatic conditions on ammonia emissions from a battery cage and an aviary housing system for laying hens. Netherlands Journal of Agricultural Science. 43(4). 351–373. 29 indexed citations

Aarnink, A.J.A., A. R. Keen, J.H.M. Metz, L. Speelman, & M.W.A. Verstegen. (1995). Ammonia Emission Patterns during the Growing Periods of Pigs Housed on Partially Slatted Floors. Journal of Agricultural Engineering Research. 62(2). 105–116. 71 indexed citations

Keen, A. R., et al.. (1994). Het effect van spoelen op de ammoniakemissie uit melkveestallen : het schatten van behandelingseffecten en nauwkeurigheden door tijdreeksanalyse = The effect of flushing on the ammonia emission from dairy cattle houses : estimation of treatment effects and accuracies by time series analysis. Socio-Environmental Systems Modeling. 1 indexed citations

Keen, A. R., et al.. (1993). Pasture feeding - a contribution of additional flavour nuances to milkfat and meat flavour. 3–419922431. 7 indexed citations

10.

Keen, A. R., et al.. (1980). Seasonal variation in the colour of milkfat from different herds.. 15(1). 91–93. 2 indexed citations

11.

Keen, A. R., et al.. (1974). Formation of methyl ketones during ripening of Cheddar cheese. Journal of Dairy Research. 41(1). 73–80. 11 indexed citations

12.

Keen, A. R., et al.. (1974). Diacetyl, acetoin, 2,3-butyleneglycol, 2-butanone and 2-butanol concentrations in ripening Cheddar cheese. Journal of Dairy Research. 41(1). 65–71. 20 indexed citations

13.

Keen, A. R., et al.. (1974). The formation of 2-butanone and 2-butanol in Cheddar cheese. Journal of Dairy Research. 41(2). 249–257. 44 indexed citations

14.

Keen, A. R., et al.. (1974). The determination of acetic, propionic and butyric acids in cheese. Journal of Dairy Research. 41(3). 397–404. 10 indexed citations

15.

Keen, A. R., et al.. (1973). Separation of diacetyl, acetoin, and 2,3-butylene glycol by ion-exchange chromatography. Analytical Biochemistry. 52(2). 475–481. 8 indexed citations

16.

Keen, A. R.. (1972). Growth studies on the lactic streptococci: II. The effect of agitation on the growth characteristics ofStreptococcus lactisML₈in batch culture. Journal of Dairy Research. 39(1). 141–150. 9 indexed citations

17.

Keen, A. R.. (1972). Growth studies on the lactic streptococci: I. A laboratory apparatus suitable for fermentation studies using skim-milk medium. Journal of Dairy Research. 39(1). 133–140. 7 indexed citations

18.

Keen, A. R.. (1972). Growth studies on the lactic streptococci: III. Observations on continuous growth behaviour in reconstituted skim-milk. Journal of Dairy Research. 39(1). 151–159. 11 indexed citations

19.

Keen, A. R.. (1972). Growth studies on the lactic streptococci: IV. Some observations on redox potential. Journal of Dairy Research. 39(1). 161–165. 5 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.

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