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Air-cleaning System Effectiveness for Control of Airborne Microbes in a Meat-processing Plant (2002)

Cundith, C. J. ; Kerth, C. R. ; Jones, W. R. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Journal of food science 67 (2002), S. 0

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ISSN: 1750-3841

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology

Notes: : :The effectiveness of duct-mounted and console wall-mounted germicidal air cleaning units on the reduction of airborne microbes was determined. Preliminary air samples were collected and airborne bacteria and molds were monitored over time in the retail sales room, processing room, aging cooler and chill cooler of the Auburn Univ. Meat Laboratory. Log10 cfu/m3 bacteria and molds were not reduced by filtration of fresh air in the air duct of the sales room(P 〉 0.05). After at least 18 h of filtration, 3 or 4 console filtration units operated simultaneously were effective (P ≤ 0.05) at reducing airborne bacteria and molds under controlled conditions in the processing room, aging cooler, and chill cooler. Three console filtration units reduced (P ≤ 0.05) airborne molds under production conditions in the processing room. These data suggest that an electrostatically polarized filter medium combined with scanning UV light is effective in reducing airborne microorganisms in a small processing plant.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb09471.x

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A correlation method for detecting and estimating linkage between a marker locus and a quantitative trait locus using inbred lines (1995)

Hu, Z. ; Zhang, X. ; Xie, C. ; [et al.]

Springer

Theoretical and applied genetics 90 (1995), S. 1074-1078

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ISSN: 1432-2242

Keywords: Genetic marker ; Inbred line ; Linkage ; Quantitative trait locus (QTL)

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract The advent of molecular genetic markers has stimulated interest in detecting linkage between a marker locus and a quantitative trait locus (QTL) because the marker locus, even without direct effect on the quantitative trait, could be useful in increasing the response to selection. A correlation method for detecting and estimating linkage between a marker locus and a QTL is described using selfing and sib-mating populations. Computer simulations were performed to estimate the power of the method, the sample size (N) needed to detect linkage, and the recombination value (r). The power of this method was a function of the expected recombination value E(r), the standardized difference (d) between the QTL genotypic means, and N. The power was highest at complete linkage, decreased with an increase in E(r), and then increased at E(r)=0.5. A larger d and N led to a higher power. The sample size needed to detect linkage was dependent upon E(r) and d. The sample size had a minimum value at E(r)=0, increased with an increase in E(r) and a decrease in d. In general, the r was overestimated. With an increase in d, the r was closer to its expectation. Detection of linkage by the proposed method under incomplete linkage was more efficient than estimation of recombination values. The correlation method and the method of comparison of marker-genotype means have a similar power when there is linkage, but the former has a slightly higher power than the latter when there is no linkage.