ELIZA

return kwic search for present out of >500 occurrences
505151 occurrences (No.26 in the rank) during 5 years in the PubMed. [no cache] 500 found

457) Our study suggests that PFOS could indeed pose a potential risk to ecological safety of soil if present even at concentrations as low as 0.8 μg g(-1) since the highest bioaccumulation factor was found to be from such a soil (field contaminated RBD).

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PMID:23695853 DOI:10.1007/s11356-013-1782-y

2015 Environmental science and pollution research international

* Perfluorooctane sulfonate release pattern from soils of fire training areas in Australia and its bioaccumulation potential in the earthworm Eisenia fetida.

- Aqueous film-forming foams (AFFF) are used to extinguish hydrocarbon fuel fires. Certain AFFF products such as 3M Lightwater contain perfluorooctane sulfonate (PFOS) as the active ingredient which is highly persistent in the environment and is thus globally prevalent. With thousands of tons of soils potentially contaminated with PFOS stockpiled at a number of sites in Australia, the lack of reliable information on bioavailability of this recalcitrant contaminant constrains the application of a risk-based strategy for managing such soils. In this study, the PFOS release pattern from soils collected from the contaminated sites of fire training areas and its bioaccumulation potential in earthworm were investigated. The study was conducted at two temperatures (25 and 37 °C) and 60 % of the maximum water-holding capacity of soils. The greatest release into water was found to occur from the soil having the highest PFOS concentration, 16.17 μg g(-1) (Tindal FTA064), thereby demonstrating the role of contaminant loading on release behaviour. The release could also be related to the soil physico-chemical properties. The maximum amount of PFOS was desorbed from the soil with the lowest clay and organic matter content. Bioaccumulation of PFOS in earthworms (Eisensia fetida) as expressed by the bioaccumulation factor (BAF) was found to be highest from soil with the lowest PFOS concentration (RBD soil). The range of BAF found in our study was 1.23 (spiked Tindal SS01 soil) to 13.9 (field contaminated RBD soil). Our study suggests that PFOS could indeed pose a potential risk to ecological safety of soil if present even at concentrations as low as 0.8 μg g(-1) since the highest bioaccumulation factor was found to be from such a soil (field contaminated RBD).

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(1)151 study	(10)8 review	(19)3 findings	(28)2 only
(2)60 a	(11)7 investigation	(20)3 on	(29)2 paper,
(3)37 study,	(12)6 an	(21)3 our	(30)2 report,
(4)36 in	(13)6 case	(22)3 research	(31)2 studies
(5)21 the	(14)5 article	(23)2 as	(32)2 this
(6)10 results	(15)5 data	(24)2 between	(33)2 to
(7)9 null	(16)4 and	(25)2 case,	(34)2 work
(8)9 with	(17)4 here	(26)2 either
(9)8 at	(18)4 two	(27)2 more

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--- WordNet output for present --- =>出席している, そこにある, 現在の, 今の, 当面の, いあわせている, 考慮している, 現在, を人に贈る, 進呈する, を与える, を渡す, を紹介する, を公開する, を見せる, 示す, 贈り物, 【文法】現在時制の, プレゼント, 贈る, ある, 現在形の Overview of noun present The noun present has 3 senses (first 2 from tagged texts) 1. (17) present, nowadays -- (the period of time that is happening now; any continuous stretch of time including the moment of speech; "that is enough for the present"; "he lives in the present with no thought of tomorrow") 2. (4) present -- (something presented as a gift; "his tie was a present from his wife") 3. present, present tense -- (a verb tense that expresses actions or states at the time of speaking) Overview of verb present The verb present has 13 senses (first 10 from tagged texts) 1. (40) show, demo, exhibit, present, demonstrate -- (give an exhibition of to an interested audience; "She shows her dogs frequently"; "We will demo the new software in Washington") 2. (28) present, represent, lay out -- (bring forward and present to the mind; "We presented the arguments to him"; "We cannot represent this knowledge to our formal reason") 3. (14) stage, present, represent -- (perform (a play), especially on a stage; "we are going to stage `Othello'") 4. (13) present, submit -- (hand over formally) 5. (7) present, pose -- (introduce; "This poses an interesting question") 6. (3) award, present -- (give, especially as an honor or reward; "bestow honors and prizes at graduation") 7. (3) give, gift, present -- (give as a present; make a gift of; "What will you give her for her birthday?") 8. (3) deliver, present -- (deliver (a speech, oration, or idea); "The commencement speaker presented a forceful speech that impressed the students") 9. (2) introduce, present, acquaint -- (cause to come to know personally; "permit me to acquaint you with my son"; "introduce the new neighbors to the community") 10. (1) portray, present -- (represent abstractly, for example in a painting, drawing, or sculpture; "The father is portrayed as a good-looking man in this painting") 11. confront, face, present -- (present somebody with something, usually to accuse or criticize; "We confronted him with the evidence"; "He was faced with all the evidence and could no longer deny his actions"; "An enormous dilemma faces us") 12. present -- (formally present a debutante, a representative of a country, etc.) 13. salute, present -- (recognize with a gesture prescribed by a military regulation; assume a prescribed position; "When the officers show up, the soldiers have to salute") Overview of adj present The adj present has 2 senses (first 2 from tagged texts) 1. (60) present -- (temporal sense; intermediate between past and future; now existing or happening or in consideration; "the present leader"; "articles for present use"; "the present topic"; "the present system"; "present observations") 2. (39) present -- (being or existing in a specified place; "the murderer is present in this room"; "present at the wedding"; "present at the creation") --- WordNet end ---