Abstract：
:The biochemical oxygen demand (BOD) value is still a key parameter that can determine the level of organics, particularly the content of biodegradable organics in water. In this work, the effects of sample dilution, which should be done inevitably to get appropriate dissolved oxygen (DO) depletion, on the measurement of 5-day BOD (BOD(5)), was investigated with and without seeding using natural and synthetic water. The dilution effects were also evaluated for water samples taken in different seasons such as summer and winter because water temperature can cause a change in the types of microbial species, thus leading to different oxygen depletion profiles during BOD testing. The predation phenomenon between microbial cells was found to be dependent on the inorganic nutrients and carbon sources, showing a change in cell populations according to cell size after 5-day incubation. The dilution of water samples for BOD determination was linked to changes in the environment for microbial growth such as nutrition. The predation phenomenon between microbial cells was more important with less dilution. BOD(5) increased with the specific amount of inorganic nutrient per microbial mass when the natural water was diluted. When seeding was done for synthetic water samples, the seed volume also affected BOD due to the rate of organic uptake by microbes. BOD(5) increased with the specific bacterial population per organic source supplied at the beginning of BOD measurement. For more accurate BOD measurements, specific guidelines on dilution should be established.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Seo KS,Chang HN,Park JK,Choo KHdoi
10.1007/s00253-007-1055-0subject
Has Abstractpub_date
2007-09-01 00:00:00pages
951-6issue
4eissn
0175-7598issn
1432-0614journal_volume
76pub_type
杂志文章abstract：:Streptococcus thermophilus (ST) is a lactic acid bacterium widely used in dairy industry and displays several properties which could be beneficial for host. The objective of this study was to investigate, in vitro, the implication of sortase A (SrtA) and sortase-dependent proteins (SDPs) in the adhesion of ST LMD-9 st...
journal_title：Applied microbiology and biotechnology
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journal_title：Applied microbiology and biotechnology
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pub_type： 杂志文章
doi：10.1007/s00253-007-1042-5
更新日期：2007-09-01 00:00:00
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journal_title：Applied microbiology and biotechnology
pub_type： 杂志文章,评审
doi：10.1007/s00253-015-7037-8
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journal_title：Applied microbiology and biotechnology
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journal_title：Applied microbiology and biotechnology
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doi：10.1007/s00253-006-0636-7
更新日期：2007-02-01 00:00:00
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journal_title：Applied microbiology and biotechnology
pub_type： 杂志文章
doi：10.1007/s00253-013-5401-0
更新日期：2014-03-01 00:00:00
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doi：10.1007/s00253-016-7874-0
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journal_title：Applied microbiology and biotechnology
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doi：10.1007/s00253-008-1563-6
更新日期：2008-09-01 00:00:00
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journal_title：Applied microbiology and biotechnology
pub_type： 杂志文章
doi：10.1007/s00253-012-4577-z
更新日期：2013-08-01 00:00:00
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pub_type： 杂志文章,评审
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journal_title：Applied microbiology and biotechnology
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更新日期：1992-06-01 00:00:00
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journal_title：Applied microbiology and biotechnology
pub_type： 杂志文章
doi：10.1007/BF00172830
更新日期：1995-05-01 00:00:00
abstract：:Possessing three circular chromosomes is a distinct genomic characteristic of Burkholderia cenocepacia AU 1054, a clinically important pathogen in cystic fibrosis. In this study, base composition, codon usage and functional role category were analyzed in the B. cenocepacia AU 1054 genome. Although no bias in the base ...
journal_title：Applied microbiology and biotechnology
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