M. O’Brien

1.0k citations

30 papers · 691 · h-index 15

Impact in

Agronomy and Crop Science top 2%
- Ruminant Nutrition and Digestive Physiology
- Reproductive Physiology in Livestock
Food Science top 5%
- Essential Oils and Antimicrobial Activity

Papers in

Agronomy and Crop Science 15
- Ruminant Nutrition and Digestive Physiology 14
- Reproductive Physiology in Livestock 4
- Bioenergy crop production and management 3
Ecology, Evolution, Behavior and Systematics 8
- Plant and fungal interactions 7

Co-authors: P. O’Kiely (18 shared papers)Hubert T. Fuller (7 shared papers)P.D. Forristal (7 shared papers)Alberto Navarro‐Villa (7 shared papers)T.M. Boland (9 shared papers)Secundino López (4 shared papers)Jens C. Frisvad (1 shared paper)Kristian Fog Nielsen (1 shared paper)
Journals: Animal Feed Science and Technology (6 papers)Grass and Forage Science (5 papers)Animal Production Science (2 papers)Annals of Applied Biology (1 paper)International Journal of Food Microbiology (1 paper)
Partner nations: Ireland Japan Spain

In The Last Decade

M. O’Brien

30 papers receiving 640 citations

Peers

Countries citing papers authored by M. O’Brien

Since Specialization

Citations

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

Fields of papers citing papers by M. O’Brien

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by M. O’Brien. 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 M. O’Brien. The network helps show where M. O’Brien may publish in the future.

Co-authors

The 25 scholars most cited alongside M. O’Brien, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with M. O’Brien Line = papers co-authored together M. O’Brien links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 30 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Mycotoxins and Other Secondary Metabolites Produced in Vitro byPenicillium paneumFrisvad andPenicillium roquefortiThom Isolated from Baled Grass Silage in Ireland Journal of Agricultural and Food Chemistry ·M. O’Brien, Kristian Fog Nielsen, P. O’Kiely, P.D. Forristal, Hubert T. Fuller, Jens C. Frisvad	2006	113
2	Inhibition of verocytotoxigenic Escherichia coli in model broth and rumen systems by carvacrol and thymol International Journal of Food Microbiology ·Lucía Rivas, Mary J. McDonnell, Catherine M. Burgess, M. O’Brien, Alberto Navarro‐Villa, Séamus Fanning, Geraldine Duffy	2010	100
3	Fungi isolated from contaminated baled grass silage on farms in the Irish Midlands FEMS Microbiology Letters ·M. O’Brien, P. O’Kiely, P.D. Forristal, Hubert T. Fuller	2005	64
4	In vitro rumen methane output of red clover and perennial ryegrass assayed using the gas production technique (GPT) Animal Feed Science and Technology ·Alberto Navarro‐Villa, M. O’Brien, Secundino López, T.M. Boland, P. O’Kiely	2011	46
5	Modifications of a gas production technique for assessing in vitro rumen methane production from feedstuffs Animal Feed Science and Technology ·Alberto Navarro‐Villa, M. O’Brien, Secundino López, T.M. Boland, P. O’Kiely	2011	39
6	Fungal contamination of big‐bale grass silage on Irish farms: predominant mould and yeast species and features of bales and silage Grass and Forage Science ·M. O’Brien, P. O’Kiely, P.D. Forristal, Hubert T. Fuller	2008	35
7	Reducing in vitro rumen methanogenesis for two contrasting diets using a series of inclusion rates of different additives Animal Production Science ·M. O’Brien, Alberto Navarro‐Villa, P. J. Purcell, T.M. Boland, P. O’Kiely	2013	33
8	Quantification and identification of fungal propagules in well-managed baled grass silage and in normal on-farm produced bales Animal Feed Science and Technology ·M. O’Brien, P. O’Kiely, P.D. Forristal, Hubert T. Fuller	2006	33
9	Visible fungal growth on baled grass silage during the winter feeding season in Ireland and silage characteristics associated with the occurrence of fungi Animal Feed Science and Technology ·M. O’Brien, P. O’Kiely, P.D. Forristal, Hubert T. Fuller	2007	31
10	In vitro rumen methane output of grasses and grass silages differing in fermentation characteristics using the gas‐production technique (GPT) Grass and Forage Science ·Alberto Navarro‐Villa, M. O’Brien, Secundino López, T.M. Boland, P. O’Kiely	2012	22
11	The Impact of Season, Parity, and Volume of Colostrum on Holstein Dairy Cows Colostrum Composition Agricultural Sciences ·Soheila Zarei, G.R. Ghorbani, M. Khorvash, M. O’Brien, Amir Hossein Mahdavi, Ahmad Riasi	2017	22
12	Morphological and molecular characterisation of Penicillium roqueforti and P. paneum isolated from baled grass silage Mycological Research ·M. O’Brien, Damian Egan, P. O’Kiely, P.D. Forristal, Fiona M. Doohan, Hubert T. Fuller	2008	19
13	The impact of Lactobacillus plantarum TUA1490L supernatant on in vitro rumen methanogenesis and fermentation Anaerobe ·M. O’Brien, Tani Hashimoto, Akitsugu Senda, Takehiro Nishida, J. Takahashi	2013	18
14	In vitro rumen methane output of perennial ryegrass samples prepared by freeze drying or thermal drying (40°C) Animal Feed Science and Technology ·P. J. Purcell, M. O’Brien, T.M. Boland, P. O’Kiely	2011	17
15	Impacts of herbage mass and sward allowance of perennial ryegrass sampled throughout the growing season on in vitro rumen methane production Animal Feed Science and Technology ·P. J. Purcell, M. O’Brien, T.M. Boland, M. O’Donovan, P. O’Kiely	2011	16
16	Agricultural Implications of the Fukushima Nuclear Accident (III) Directory of Open access Books (OAPEN Foundation) ·Tomoko Nakanishi, M. O’Brien, Keitaro Tanoi	2019	12
17	Occurrence of filamentous fungi and mycotoxins in wrapped forages in Sweden and Norway and their relation to chemical composition and management Grass and Forage Science ·Jessica Schenck, Cecilia E. Müller, Annika Djurle, Dan Funck Jensen, M. O’Brien, Astrid Z. Johansen, Peter Rasmussen, Rolf Spörndly	2019	11
18	Relevance of genetically modified crops in light of future environmental and legislative challenges to the agri‐environment Annals of Applied Biology ·M. O’Brien, Ewen Mullins	2008	10
19	In vitro rumen methane output of perennial ryegrass varieties and perennial grass species harvested throughout the growing season Grass and Forage Science ·P. J. Purcell, M. O’Brien, Alberto Navarro‐Villa, T.M. Boland, M. McEvoy, D. Grogan, P. O’Kiely	2012	10
20	In vitro rumen methane output of forb species sampled in spring and summer Agricultural and Food Science ·P. J. Purcell, T.M. Boland, M. O’Brien, P. O’Kiely	2012	7

About M. O’Brien

M. O’Brien is a scholar working on Agronomy and Crop Science, Ecology, Evolution, Behavior and Systematics, Environmental Chemistry, Plant Science and Cell Biology, having authored 30 papers that have together received 691 indexed citations. Recurring topics across this work include Ruminant Nutrition and Digestive Physiology (14 papers), Plant and fungal interactions (7 papers), Turfgrass Adaptation and Management (7 papers), Plant Pathogens and Fungal Diseases (4 papers), Reproductive Physiology in Livestock (4 papers), Bioenergy crop production and management (3 papers), Mycotoxins in Agriculture and Food (3 papers) and Fermentation and Sensory Analysis (2 papers). The work is most often cited by research in Agronomy and Crop Science (312 citations), Food Science (151 citations), Forestry (32 citations), Plant Science (290 citations) and Ecology, Evolution, Behavior and Systematics (138 citations). M. O’Brien has collaborated with scholars based in Ireland, Japan and Spain. Frequent co-authors include P. O’Kiely, Hubert T. Fuller, P.D. Forristal, Alberto Navarro‐Villa, T.M. Boland, Secundino López, Jens C. Frisvad, Kristian Fog Nielsen, Mary J. McDonnell and Lucía Rivas. Their work appears in journals such as Animal Feed Science and Technology, Grass and Forage Science, Animal Production Science, Annals of Applied Biology and International Journal of Food Microbiology.

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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