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  • 1995-1999  (2)
  • Milk  (1)
  • Thiamine  (1)
  • 1
    ISSN: 1438-2385
    Keywords: Key words Continuous flow microwave treatment ; Milk ; Vitamin B1
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  The effects of continuous flow microwave treatment and conventional heating (using a plate heat exchanger) on the nutritional value of raw milk was estimated by measurement of the vitamin B1 retention. Microwave heating, without a holding phase, did not modify the vitamin B1 content of milk, whereas analogous treatment carried out with the plate heat exchanger led to a loss of this vitamin. A holding phase caused a similar loss of vitamin B1 in milk heated using either system. These results indicate that continuous flow microwave treatment of milk compares favourably with conventional heating because it produce less destruction of vitamin B1 in milk. This could be attributed to the shorter time taken to reach the final temperature and the lack of hot surfaces in contact with the milk in the case of the microwave system.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Lebensmittel-Untersuchung und -Forschung 205 (1997), S. 48-52 
    ISSN: 1431-4630
    Keywords: Key words Lentils ; Faba beans ; Germination ; Vitamins ; Thiamine ; Riboflavin ; Niacin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  The effect of germination on the thiamine, riboflavin, as well as the available and total niacin contents in two varieties of lentils (Lens culinaris, var. vulgaris, Lens culinaris, var. variabilis) and faba beans (Vicia faba, L., var. major) were investigated. Germination of the three legumes, carried out for 6 days at 20 °C in the dark and with daily rinsing, led to a significant reduction of the thiamine content and a significant increase of the riboflavin as well as the total and available niacin contents. For Lens culinaris, var. vulgaris the effect of different conditions during the germination procedure (light, time and number of rinses) on water-soluble vitamins was studied. The presence or absence of light had no significant effect on the thiamine and riboflavin contents in germinated lentils, while the niacin content was higher when germination was conducted in the light. The increased number of rinses during the germination process had no significant effect on the thiamine content in lentils, whereas a significant decrease in the riboflavin and available niacin contents was observed, except for riboflavin when germination was carried out for 6 days and for available niacin when germination was carried out for 3 days without light, where no significant changes were detected. A longer germination time led to a recovery of the decrease in the thiamine content that was observed to occur during the initial period of germination, and significant increases of the riboflavin and available niacin contents in lentils, independently of other conditions (light and number of daily rinses), were observed. When germination was carried out for 10 days in the dark and with daily rinsing, maximal increases of the riboflavin and available niacin contents with minimal decreases in the thiamine content were observed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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