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Wyszukujesz frazę "T-2 toxin" wg kryterium: Wszystkie pola


Wyświetlanie 1-4 z 4
Tytuł:
Impact of agronomy on HT-2 and T-2 toxin content of oats.
Autorzy:
Edwards, Simon G.
Anderson, Eric
Powiązania:
https://bibliotekanauki.pl/articles/2199598.pdf
Data publikacji:
2011-06-21
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
agronomy
fungicide
HT-2
nitrogen
PGR
T-2
variety
Opis:
Surveys of oats in the UK and Nordic countries have identified high concentrations of HT-2 and T-2 can occur in unprocessed oats. HT-2 and T-2 are two closely related type A trichothecenes and two of the most toxic fusarium mycotoxins. There is currently no legislation on HT-2 and T-2, however, there is a discussion limit of 500 µg kg-1 in unprocessed oats. A previous survey identified that variety, previous crop, cultivation, fungicide use and some other factor(s) within organic oat production, which was not within the model, were all significant agronomic factors in the determination of HT-2 and T-2 concentrations of UK oats. Possible agronomy within conventional compared to organic agriculture would include the use of inorganic fertilisers and plant growth regulators (PGR). Oats harvested from two series of agronomic field experiments were analysed for the combined concentration of HT-2 and T-2 (HT2+T2) using ELISA. Experiments were repeated for both winter and spring varieties over two years. The first experiments were of a factorial design with three varieties, three nitrogen rates and plus/minus a PGR (chlormequat). The second series had twelve fungicide regimes. The results identified that there were no significant differences in HT-2+T-2 between samples from oat plots that received different rates of inorganic nitrogen, a PGR, or a range of different fungicide regimes. There was however a significant difference between varieties for both winter and spring variety experiments...
Źródło:
Plant Breeding and Seed Science; 2011, 63; 49-58
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fusarium mycotoxins and human health. Review.
Autorzy:
Shephard, Gordon S.
Powiązania:
https://bibliotekanauki.pl/articles/2199623.pdf
Data publikacji:
2011-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
cancer
deoxynivalenol
Fumonisin
T-2 toxin
trichothecenes zearalenone
Opis:
Species within the genus Fusarium produce a diverse range of mycotoxins, many of which have signifi- cant impacts on human health. Of the five generally recognised major mycotoxins, three (fumonisins, de- oxynivalenol (DON) and zearalenone (ZON)) are produced by Fusaria. Apart from DON, other trichothecenes such as T-2 toxin, have received considerable international attention due to their impact on human health. The fumonisins, which occur ubiquitously in maize and its products, have been linked to oesophageal cancer, liver cancer and neural tube defects. DON, a frequent contaminant of maize, wheat and their products, although showing no carcinogenic potential, is immunomodulatory and produces emesis and growth retardation in animals. ZON is a naturally occurring endocrine disrupting chemical. Acute exposure to these mycotoxins has in each case been linked to outbreaks of human disease – gastro-intestinal effects in the case of fumonisins and DON, and precocious pubertal changes in the case of ZON. Concern over their toxicological effects has led to risk assessments by the Joint FAO/WHO Expert Committee on Food Additives (JECFA), which has set maximum tolerable daily intakes (TDI) of 2 µg/ kg body weight (bw) for fumonisins and 0.5 µg/kg bw for ZON. The initial TDI set for DON, namely 1 µg/kg bw has recently been updated by JECFA to include both 3- and 15-acetylDON. Apart from the above mycotoxins, a number of other secondary metabolites (moniliformin, beauvericin and fusaproliferin) are produced by different Fusaria and their effects on human health, either alone or in combination with other mycotoxins, is largely unexplored.
Źródło:
Plant Breeding and Seed Science; 2011, 64; 113-122
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural Occurrence of Fusarium Mycotoxins in Oil Crop Seed
Autorzy:
Mankeviciene, Audrone
Suproniene, Skaidre
Brazauskiene, Irena
Gruzdeviene, Elvyra
Powiązania:
https://bibliotekanauki.pl/articles/2199601.pdf
Data publikacji:
2011-06-21
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
deoxynivalenol
Fusarium spp.
linseed
rapeseed
T-2 toxin
zearalenone
Opis:
Oilseeds are a perfect medium for microfungi spread and mycotoxin production. With increasing demand for oil crop produce such research has gained a special relevance since research evidence on this issue is scarce. During 2007-2009, prevalent fungi genera, including Fusarium genus, potential producer of deoxynivalenol (DON), zearalenone (ZEA), T-2 toxin (T-2) etc. were determined in our tests. The ELISA immunoenzymatic method and Veratox Fast kits were used to identify and quantify mycotoxins, while Fusarium fungi species were identified using conventional fungi determination techniques. Higher Fusarium fungi contamination level was found on linseed compared with that on spring or winter rapeseed. The difference was even more obvious in different experimental years, however, having identified Fusarium species, F. avenaceum and F. oxysporum were found to be prevalent in the seed of all crop species tested. In 2009, spring rape samples were found to contain F. dimerum which is a significant human pathogen.The presence of DON was identified in 18.2-100%, ZEA in 40 -100%, and T-2 toxin in 100% of seed samples of all oil crop species tested. From the food safety viewpoint, the concentrations determined did not exceed the levels hazardous for health, laid out in the EU regulations, however, the effect of low toxin concentrations is slow and the negative consequences manifest themselves only after some time and in various forms, which poses a serious health risk for humans and animals.
Źródło:
Plant Breeding and Seed Science; 2011, 63; 109-116
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toxicity and risks with T-2 and HT-2 toxins in cereals.
Autorzy:
Pettersson, H.
Powiązania:
https://bibliotekanauki.pl/articles/2199611.pdf
Data publikacji:
2011-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
Fusarium langsethiae
HT-2 toxin
oats
T-2 toxin
toxin contamination
toxicity
risk
Opis:
The trichothecenes T-2 and HT-2 toxins have during recent years been found frequently in cereals grown in Europe. They are mainly produced by Fusarium  langsethiae.  High concentrations of the toxins are most commonly found in oats, but they are also detected frequently at lower concentrations in barley. Wheat is only rarely contaminated. Yearly surveys of T-2 and HT-2 toxins in oats from Northern Europe have shown that the occurrence and levels have increased from 2002, with very high levels in 2005-2007, followed by a decrease in 2008-2009. Raw oats delivered to mills for processing to food have also been highly contaminated with T-2 and HT-2 toxins during the period 2006-2009. The processing of oats in the mills by sorting-sieving and dehulling reduce the toxin concentrations in the final food products, flakes and meals, with more than 80 % even at high levels in the raw oat. The concentrations of the toxins in the by-products from the process are instead increased. The by-products are mainly used as feed components. The toxic effects of T-2 and HT-2 toxins in animals and the toxicological information used in the risk evaluations are briefly described. Risk evaluations of the toxins in cereals for human consumption have been conducted by both EU-Scientific Committee on Food and by JECFA in 2001. Both evaluations resulted in the same temporary tolerable daily intake (t-TDI) for the sum of T-2 and HT-2 toxins. The group TDI for T-2 and HT-2 toxins, alone or in combination, became 60 ng/kg bw and day. The intake of T-2 and HT-2 toxins through oats is calculated from median concentrations in oat products and median consumption data from Norway. The intake was found to be 1.5-5.4 % of the t-TDI. The  toxic  effects  studied  or  expected in  farm  animals, horses  and  ruminants, consuming high amounts of oat in their feed are described and discussed.
Źródło:
Plant Breeding and Seed Science; 2011, 64; 65-74
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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