?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=A+New+Phytochemical+Screening+Programme+used+for+Crops+grown+with+Organic+and+Conventional+Methods&rft.creator=Ravn%2C+Dr.+Helle+Weber&rft.creator=Kristensen%2C+Charlotte+V.&rft.creator=Christensen%2C+Trine+F.&rft.creator=Diedrichsen%2C+Brigitte&rft.creator=Brandt%2C+Kirsten&rft.subject=+Food+security%2C+food+quality+and+human+health&rft.subject=+Specific+methods&rft.description=A+broad+screening+programme%2C+covering+the+most+general+phytochemical+groups+of+compounds%2C+was+developed+on+the+basis+of+Thin+Layer+Chromatography+(TLC).+A+total+of+46+TLC+systems%2C+comprising+26+derivatization+reagents%2C+3+stationary+phases%2C+and+4+mobile+phases%2C+were+included.+The+TLC+systems+were+classified+according+to+the+groups+of+phytochemical+compounds+detected%3A+Alcohols+and+phenolic+compounds%3B+Carbohydrates%3B+N-containing+compounds%3B+Organic+acids+and+lipids%3B+P-containing+compounds%3B+S-containing+compounds%2C+and+Terpenoids.+Furthermore%2C+one+group+of+TLC+systems+detected+compounds+from+several+of+the+mentioned+groups.+%0D%0AThe+screening+programme+was+applied+in+the+screening+of+potatoes+(S.+tuberosum+L.)%2C+peas+(P.+sativum+L.)%2C+kale+(B.+oleracea+L.)%2C+carrots+(D.+carota+L.)%2C+and+apples+(M.+domestica+Borkh.)%2C+cultivated+with+combinations+of+organic+and+conventional+methods+for+plant+protection+and+nutrient+supply%2C+for+phytochemical+differences+(biomarkers).%0D%0ADistinctive+phytochemical+differences+were+found+between+the+differently+cultivated+samples+of+these+crops.+In+peas+and+carrots+only+one+biomarker+was+found.+In+peas+the+biomarker+was+related+to+the+soil+conditions%2C+while+the+biomarker+in+carrots+was+related+to+the+use+of+pesticides.+In+potato%2C+two+biomarkers+related+to+the+use+of+pesticides+were+found.+Three+biomarkers+were+found+in+kale.+Two+of+these+could+be+related+to+the+use+of+pesticide%2C+while+the+last+was+related+to+either+fertiliser+or+soil+conditions.+Several+biomarkers+were+found+apples%2C+but+a+relation+to+the+cultivation+methods+was+not+clear.+Three+of+the+biomarkers+in+apples+could+be+related+to+either+the+use+of+pesticides+or+fertiliser%2C+while+no+conclusions+could+be+drawn+from+the+other+biomarkers+found.%0D%0AThe+results+of+the+screening+programme+form+the+basis+for+a+potential+development+of+a+kit+to+detect+whether+crops+are+organically-+or+conventionally+cultivated.+Furthermore%2C+the+results+from+this+part+and+other+parts+of+the+project+%22Organic+food+and+health+%C3%A2%C2%80%C2%93+a+multigenerational+animal+experiment%22+provide+basis+for+the+selection+of+which+secondary+compounds+to+quantify+by+specific+chemical+analysis%2C+isolate%2C+and%2For+structure+elucidation.%0D%0A&rft.date=2002-12&rft.type=Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F1490%2F1%2FScreening_report.pdf&rft.identifier=Ravn%2C+Dr.+Helle+Weber%3B+Kristensen%2C+Charlotte+V.%3B+Christensen%2C+Trine+F.%3B+Diedrichsen%2C+Brigitte+and+Brandt%2C+Kirsten+(2002)+A+New+Phytochemical+Screening+Programme+used+for+Crops+grown+with+Organic+and+Conventional+Methods.+[+Unpublished%2C+]+*&rft.relation=http%3A%2F%2Forgprints.org%2F1490%2F