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Animals (Basel)

Title:		Construction and Operation of a Ventilated Hood System for Measuring Greenhouse Gas and Volatile Organic Compound Emissions from Cattle
Author(s):		Place SE; Pan Y; Zhao Y; Mitloehner FM;
Address:		"Department of Animal Science, University of California, Davis, One Shields Ave., Davis, CA 95616, USA. seplace@ucdavis.edu. Department of Animal Science, University of California, Davis, One Shields Ave., Davis, CA 95616, USA. yepan@ucdavis.edu. Department of Animal Science, University of California, Davis, One Shields Ave., Davis, CA 95616, USA. yjzhao@ucdavis.edu. Department of Animal Science, University of California, Davis, One Shields Ave., Davis, CA 95616, USA. fmmitloehner@ucdavis.edu"
Journal Title:		Animals (Basel)
Year:		2011
Volume:		20111208
Issue:		4
Page Number:		433 - 446
DOI:		10.3390/ani1040433
ISSN/ISBN:		2076-2615 (Print) 2076-2615 (Electronic) 2076-2615 (Linking)
Abstract:		"Recent interest in greenhouse gas emissions from ruminants, such as cattle, has spawned a need for affordable, precise, and accurate methods for the measurement of gaseous emissions arising from enteric fermentation. A new head hood system for cattle designed to capture and quantify emissions was recently developed at the University of California, Davis. The system consists of two head hoods, two vacuum pumps, and an instrumentation cabinet housing the required data collection equipment. This system has the capability of measuring carbon dioxide, methane, ethanol, methanol, water vapor, nitrous oxide, acetic acid emissions and oxygen consumption in real-time. A unique aspect of the hoods is the front, back, and sides are made of clear polycarbonate sheeting allowing the cattle a full range of vision during gas sampling. Recovery rates for these slightly negative pressure chambers were measured ranging from 97.6 to 99.3 percent. This system can capture high quality data for use in improving emission inventories and evaluating gaseous emission mitigation strategies"
Keywords:		cattle emissions eructation greenhouse gas measurement;
Notes:		"PubMed-not-MEDLINEPlace, Sara E Pan, Yuee Zhao, Yongjing Mitloehner, Frank M eng Switzerland 2011/01/01 Animals (Basel). 2011 Dec 8; 1(4):433-46. doi: 10.3390/ani1040433"