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Publikasjoner

NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.

2012

Sammendrag

 A total of 25 samples of tomatoes (7), hot pepper (6), leaves of African eggplant (gboma) (6), onions (3)and white cabbage (2) were collected in November 2011 from farmers" field at eight locations in the departments of Mono and Coufto in Benin. The samples were comminuted in Benin and sent frozen to Norway for analyses of possible pesticide residues. Two multi-methods covering 300 pesticides including some metabolites were used for the analysis. Residues were detected in four samples, resulting in 12 findings; of insecticides, one combined insecticide/nematicide and/or metabolites. African eggplant (Gboma) leaves contained the highest number of residues (10 pesticides) and also the highest concentrations of pesticides. One sample of Gboma leaves from Grand-Popo, had a very high content of dimethoate and omethoate (sum 19 mg/kg) as well as other residues violating both the Codex Alimentarius" and the EU"s maximum residues limits (MRLs). Consumption of these leaves may represent a health risk as both the acceptable daily intake (ADI) and acute reference dose (ARfD) were far exceeded. Another sample of gboma leaves, also from Grand-Popo, contained 11 mg/kg of profenofos. Consumption of less than 200 grams of these leaves may also represent a health risk as the ADI are exceeded. One sample of cabbages contained low concentrations of two pesticides. No residues were found in the samples of tomatoes, hot peppers and onions.

Sammendrag

During the picking season in the Norwegian plum production areas, the harvested plums are brought to cold storage in packing houses once or twice a day. Plums picked late in the afternoon may even not be cooled properly until the next day. The average time from picking until the plums are placed in a cold storage is approximately 8 hours. Previous reports have shown that delayed cooling of sweet cherries and apples reduced the fruits’ susceptibility to physiological or fungal decay. An experiment was performed in order to evaluate the impact of different delay-to-cold storage times (0, 5, 10, 15 and 25 hours) on quality and phenolic contents changes of Norwegian ‘Mallard’ plums during cold storage, transport, and retail in normal atmosphere (NA). The fruits (10 fruits in PE tray, n=3) were stored for 14 days at 1°C, followed by 3 days at 7°C and then for 4 days at 20°C. Fruit quality parameters (firmness, colour in CIE L, a*, b* colour space, weight, rot occurrence (%)) and total phenol and anthocyanin content were determined. Samples were analyzed just before cold storage and then after 14 days at 1°C, 3 days at 7°C, or 4 days at 20°C. Evaluation of results has shown that delay of cooling has a retarding effect on rot development during 20°C storage (post cold transport), weight loss and stimulates anthocyanin accumulation and colour changes to some extent. At the end of storage no effect on fruit firmness could be observed.

Sammendrag

During the picking season in the Norwegian plum production areas, the harvested plums are brought to cold storage in packing houses once or twice a day. Plums picked late in the afternoon may even not be cooled properly until the next day. The average time from picking until the plums are placed in a cold storage is approximately 8 hours. Previous reports have shown that delayed cooling of sweet cherries and apples reduced the fruits’ susceptibility to physiological or fungal decay. An experiment was performed in order to evaluate the impact of different delay-to-cold storage times (0, 5, 10, 15 and 25 hours) on quality and phenolic contents changes of Norwegian ‘Mallard’ plums during cold storage, transport, and retail in normal atmosphere (NA). The fruits (10 fruits in PE tray, n=3) were stored for 14 days at 1°C, followed by 3 days at 7°C and then for 4 days at 20°C. Fruit quality parameters (firmness, colour in CIE L, a*, b* colour space, weight, rot occurrence (%)) and total phenol and anthocyanin content were determined. Samples were analyzed just before cold storage and then after 14 days at 1°C, 3 days at 7°C, or 4 days at 20°C. Evaluation of results has shown that delay of cooling has a retarding effect on rot development during 20°C storage (post cold transport), weight loss and stimulates anthocyanin accumulation and colour changes to some extent. At the end of storage no effect on fruit firmness could be observed.

Sammendrag

Tidlig på våren i 2012 ble det observert døde og døende trær av gråor i vannkanten langs Årungen i Ås kommune (Akershus). På stammene var det tjærefargede flekker, et symptom som gjerne forbindes med angrep av plantepatogene arter innen slekten Phytophthora. Fram til 1990-tallet var det ikke kjent at Phytophthora kunne angripe or, men i 1993 ble dette oppdaget i England, hvor tusenvis av oretrær har blitt ødelagt av denne sjukdomsorganismen. Det er en egen art, Phytophthora alni, som angriper or. Den er senere funnet i mange europeiske land og i Nord-Amerika. I august 2012 påviste vi P. alni for første gang i Norge på prøver fra gråor ved Årungen.