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At least 361 records · Page 20Linked to original sources
PubMed2004

Direct coupling of supercritical fluid extraction to a gas phase atmospheric pressure chemical ionisation source ion trap mass spectrometer for fast extraction and analysis of food components.

Supercritical fluid extraction (SFE) was coupled to a custom-built atmospheric pressure chemical ionization (APCI) source of an ion trap mass spectrometer (ITMS). This method was developed for the monitoring of static or dynamic carbon dioxide extraction of volatile aroma compounds in real time. The gas phase APCI source resulted in simple spectra where the extraction of individual compounds could be monitored. A classical mint extraction was used to demonstrate the possibilities of the method. Influence of cell loading and standard injection possibilities are described. Limit of detection of the system was 0.5 nl or lower for a series of test compounds. Prospect for a fast method for extraction and quantification was raised and discussed.

Atmospheric Pressure↗
PubMed2005

Analysis of acrylamide in food: dedicated to Professor Dr. Werner Baltes.

Since the first discovery of the presence of acrylamide in a variety of food products in April 2002, numerous methods have been developed to determine the acrylamide monomer in heat-treated carbohydrate-rich food. These detection methods are mainly MS-based, coupled with a chromatographic step using LC or GC. The Food Chemistry Institute (LCI) of the Association of the German Confectionery Industry (BDSI) therefore established a detection method by means of aqueous extraction plus a cleaning step and LC-MS/MS detection, making great efforts to ensure internal and external validation. Citing potato crisps as an example, we will in the following show how the German manufacturing companies have gone to great pains to reduce acrylamide levels in their products.

Acrylamide↗
PubMed1986

Computerized dietary analysis by food groups and by nutrients from food groups.

The professional responsibility of dietetic and nutrition educators and counselors is to provide clients and the public with accurate, understandable information and counseling concerning the relationship of diet to health and disease. Dietary guidance expressed as energy and nutrient content is clear to the nutrition professional, but it frequently is difficult for many clients to comprehend. This study was undertaken to develop a computer software program to analyze dietary data in terms of foods, food groups, and nutrients and to discuss the applications of the computerized assessment. Dietary recalls from a group of noninstitutionalized older women were used for illustrative purposes. Dietary intakes were described in terms of servings consumed of 9 major food groups and 39 major subgroups. Intake of energy and selected nutrients from each major food group was calculated. Recalls were evaluated by comparison with recommended servings from two food guides and recommended energy and nutrient allowances. The information elicited by the software package is useful for monitoring changes in food consumption patterns, assessing dietary compliance, planning, and evaluating nutrition and feeding programs.

Aged↗
PubMed1982

[Physiological analysis of food motivation in experimentally induced water-salt imbalance].

Internal or motivational factors and external or signal factors were assessed to determine their role in motor-food response during conditioning in cats and dogs. Under experimental water-salt dysbalance visceral signalling was shown to be an essential factor involved in a goal-directed response. In addition to dominant motivation, a conditioned food signal seems to be this factor. In search for neurophysiological correlates of food motivation, we studied responses of n. tractus solitaris in rats to adequate chemical stimulation of the tongue receptors and viscerochemoreceptors. 3 groups of neurons were distinguished: those responding to the stimulation of only one receptive zone (taste and viscerochemical neurons) and neurons responding to the stimulation of both receptive areas ("convergence" units). Under salt deprivation, threshold concentrations of salt for responses from n. solitaris decreased and the response from a convergence neuron to viscerochemical stimulation diminished following application of sodium chloride on the tongue receptor.

Animals↗