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   644 Institute of Nutrition EFFECTS
OF MAILLARD REACTION PRODUCTS (MRPs) ON MUTA-GENICITY OF NITRITE-AMINOPYRENE
REACTION PRODUCT : STUDIES ON FORMATION OF MUAGEN AND ON FINAL
PRODUCT Renu Chongmankongcheep1, Kaew Kangsadalampai1, Anadi
Nitithamyong1 and Wannee Kusamran2 1Institute of Nutrition,
Mahidol University at Salaya, Nakhon Pathom 73170, Thailand,
2National Cancer Institute, Department of Medical Services,
Ministry of Public Health. Key text : mutagenicity / aminopyrene
/ nitrite / mailard activity products / ames effort   Â
                 Maillard activity products
from cysteine-sugars and methionine-sugars were proven for
their mutagenicity using Salmonella mutagenicity effort without
metabolous activation.
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The mutagenicity of Maillard activity
products was not institute on both Salmonella typhimurium
strains TA98 and TA100. After being interacted with nitrite,
most Maillard activity products ease showed no mutagenicity
at the dose examined but exhibited the tendency to be mutagenic
on strains TA98 and TA100. Maillard activity products from
cysteine-fructose, cysteine-lactose and methionine-fructose
which were institute to be mutagenic on TA100 and that from
methionine-glucose was institute to be mutagenic on TA98.
All Maillard activity products were also examined for their
gist on the mutagenicity of aminopyrene-nitrite activity variety
and 4-h nitrite-treated aminopyrene. It was institute that
most Maillard activity products increased the mutagenicity
of aminopyrene-nitrite activity variety strains TA98 and TA100.
The mutagenicity of Maillard activity products-aminopyrene
nitrite creation was higher than that in 4-h aminopyrene nitrite
creation and Maillard activity creation when it was proven
using lineage TA98 only. Partial killing gist was elicited
when Maillard activity products from cysteine-sugars were
merged to the aminopyrene nitrite creation through lineage
TA100. FOOD REFERENCE MATERIALS FOR NUTRITION LABELLING ANALYTICAL
QUALITY CONTROL PROGRAMME Prapasri Puwastien, Pongtorn Sungpuag
and Kunchit Judprasong, Institute of Nutrition, Mahidol University
at Salaya, Nakhon Pathom 73170, Thailand. Key text : ASEANFOODS,
reference materials, nutrition labelling. Â Â Â Â Â Â Â Â
            With the co-operative efforts of expert
laboratories in various countries including Australia, New
Zealand, Fiji, the Netherlands, army and ASEANFOODS member
countries, a newborn set of reference materials aimed at nutrition
labelling analytical quality control programmes was developed.
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Two advertizement products, exchange
matter and seek flour as dry and homogenous powders, were
designated as effort materials. They were studied for homogeneity
and stability of representative nutrients prior to and during
organisation to expert laboratories for analysis. Statistical
evaluation of results revealed consensus values of total fat,
supersaturated fruitful (weaning food), cholesterol (fish
flour), protein, dietary fibre, sugars (weaning food), sodium,
vitamin A (weaning food), calcium, iron, tree and moisture
(fish flour). Due to the wide alteration of the values for
vitamin B1 (weaning food) and B2 in both samples, exclusive
suggested.
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