iPSC-derived cortical neurons to study sporadic Alzheimer disease: A transcriptome comparison with post-mortem brain samples.

Alzheimer's disease (AD) is the most common cause of dementia, characterized by the progressive impairment of cognition and memory loss. Sporadic AD (sAD) represents approximately 95 % of the AD cases and is induced by a complex interplay between genetic and environmental factors called "Alzheimerogens". Heavy metals (e.

Pesticide residue concentrations in the Belgian total diet, 1991-1993.

In the period 1991-1993, an official study was conducted to measure the presence and evaluate the risk of pesticide residues in plantbased food in the Belgian total diet. Positive samples were subjected to one or more culinary treatments (washing, peeling, steaming, or cooking) to determine the decrease of residues in prepared ready-to-eat food. Thus, better estimates of pesticide residues taken up through consumption were determined and compared with toxicological criteria.

Monitoring of pesticide residues in fresh vegetables, fruits, and other selected food items in Belgium, 1991-1993.

To estimate the exposure of the Belgian population to food contaminated with pesticide residues and to determine what pesticides people are actually consuming, a total diet study-individual approach-was performed. Fourteen kinds of fruits, 22 kinds of vegetables, and 7 other food items (coffee, drinking water, rice, tea, wine, bran, and wheat flour) were selected as major representatives of the Belgian diet. During the 2 years of study (April 1991-March 1993), about 3,698 samples were analyzed and 21 163 analyses were performed.

Headspace--gas chromatographic determination of inorganic bromide residues in vegetables.

This study describes a headspace gas-chromatographic method for the quantitative determination of inorganic bromide in vegetables. Different parameters influencing the reaction of the bromide ion into 2-bromoethanol have been investigated. The analysis of 2-bromoethanol is performed by the headspace--electron capture--gas chromatographic technique using a fused silica capillary column CP wax 52 CB.

Determination of fumigants in cereals and cereal products by capillary gas chromatography.

This study describes two methods for the quantitative determination of the residual fumigants ethylene dichloride (EDC), carbon tetrachloride (CCl4), trichloroethylene (TCE), ethylene dibromide (EDB) and tetrachloroethylene (PCE) in cereals (especially wheat) and other foodstuffs. In the first method, a micro steam distillation- solvent extraction apparatus is used, while the second method is based on a headspace technique. For the quantitative determination of carbon tetrachloride in cereals, the multiple headspace technique is not retained because it is too time-consuming.