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[GPS--good practice secondary data analysis. Working Group for the Survey and Utilization of Secondary Data (AGENS) of the German Society for Social Medicine and Prevention (DGSMP)].

The scientific use of secondary data, especially of claims data from health insurance funds, has continuously increased in the last years. Therefore the Working Group "Collection and Use of Secondary Data" (AGENS) of the German Society of Social Medicine and Prevention (DGSMP) took the initiative to define quality standards for secondary data analysis. Starting with a review of the Good Epidemiologic Practice (GEP) AGENS adapted the GEP to the specific requirements of secondary data analysis by a multi-stage consensus process. The guideline Good Practice Secondary Date Analysis (GPS) was adopted on January 15 (th), 2005. GPS consists of 10 guidelines which are divided in explaining comments and recommendations. The GPS are targeted to set up standards for secondary data analysis, and they may also be used as a foundation of contracts between data owners and scientists. They are addressed to scientists from health services research and social medicine. AGENS commits itself to revise GPS continuously.

Benchmarking↗

Did consumption of flour bleached by the agene process contribute to the incidence of neurological disease?

The present report proposes the hypothesis that increased levels of neurodegenerative disorders in humans may have arisen due to inclusion in the diet of methionine sulfoximine (MSO), a byproduct of the bleaching of flour by nitrogen trichloride. This method of bleaching, the 'agene process' was in use from early in the century and continued until at least 1949/1950. Estimates indicate that, at least in the UK, as much as 80% of all flour during this period was produced by this process. MSO acts directly to inhibit the production of two crucial molecules, glutathione (GSH) and glutamine. Decreases in GSH, a key antioxidant and free radical scavenger, diminish the body's antioxidant defenses and may lead to increased oxidative stress. Decreases in glutamine synthesis may act to increase free glutamate and give rise to increased levels of ammonia. Cells in the nervous system are particularly sensitive to a decline in either GSH or glutamine. The combined effects of decreases in these molecules, particularly with long-term exposure to MSO in bleached flour, may have had quite drastic effects on neuronal health and survival. The present hypothesis may provide clues to the etiology of neurological disorders such as Alzheimer's disease (AD), Parkinson's disease (PD) and amyotrophic lateral sclerosis (ALS), suggesting that such disorders may arise in part due to toxic actions of some compounds in processed human foods.

Buthionine Sulfoximine↗

Dose-morality and large-scale studies for controlling codling moth (Lepidoptera: Tortricidae) eggs on 'd'Agen' plums by using methyl bromide.

Codling moth, Cydia pomonella (L.), eggs on 'd'Agen' cultivar of plums, Prunus salicina Lindl., were treated with methyl bromide to determine if a quarantine treatment could be developed so that the plums could be exported to Japan from the United States. Small-scale tests consisted of treating codling moth eggs on plums with various doses of methyl bromide at 20 degrees C for 2 h. Small-scale tests showed that 0- to 24-h-old eggs of codling moth on the plums were controlled by doses > 22.5 g/m3. Because testing showed that 48 g/m3 had no adverse effect on the quality of plums, this dose was chosen for large-scale testing to establish the quarantine dose. Large-scale tests consisted of treating plums at 18.5 degrees C for 2 h using methyl bromide at a dose of 48 mg/liter. Large-scale tests showed that the dose of 48 g/m3 killed all 0- to 24-h-old codling moth eggs exposed on plums in packing cartons without affecting the quality of the plums.

Animals↗

Volatile changes during dehydration of d'Agen prunes.

Solid phase microextraction (SPME) was used in conjunction with GC-MS to monitor the changes in some major volatile flavors during drying of plums. The aroma profile was significantly modified during the process and substantial loss of the original volatile flavors was observed. The generation of some compounds was shown to be due to the thermal decomposition of carbohydrates. This paper discusses the importance of aroma profiling in detecting the progress of the chemical (degradation) reactions and identifying marker volatiles in quality control of the product.

Fruit↗