نتایج جستجو برای: nitrosamines
تعداد نتایج: 1291 فیلتر نتایج به سال:
The N-nitrosamines of secondary amines are known to be carcinogenic. The nitrosamines of glyphosate are formed on a secondary amine. I now raise the issue of the N-nitrosamines of glyphosate of which there are several, because they are carcinogens and have all been essentially ignored. It appears that Monsanto and the US EPA have hidden the N-nitrosamines of glyphosate from discussion even to t...
BACKGROUND Before the 1930s, squamous cell carcinoma (SCC) of the oesophagus was almost unknown among black South Africans. From the 1930s the annual frequency rose. A dietary cause was sought, the staple diet of black people having changed from sorghum to maize (corn), with traditional beer being brewed from maize. Carcinogenic N-nitrosamines in traditional beer were suggested as a cause of SC...
The presence of N-nitrosamines was determined in samples of industrially manufactured liver patty stored at different temperatures for a variable period of time. Sample preparation included steam distillation and extraction of redistilled samples with dichlormethane. The extracts were analyzed by a gas chromatography--mass spectrometry system (GC-MS-SIM). Study results expressed as total N-nitr...
conclusions nitrosamine was formed with conventional potato baking methods with the most nitrosamine formation found on the surface fried samples. nitrites amount in baked potatoes decreased. generally, the amount of nitrosamine in baked potato samples was lower than acceptable limits. results fried samples that were measured by the gas chromatography method had the highest average levels of ni...
Millions of people are exposed daily to N-nitrosamines from different environmental sources. The present study aims at investigating the role of N-nitrosamines in the alteration of homocysteine, lipid profile, oxidative stress, paraoxonase activity, antioxidant enzymes, and free radicals which are important risk factors for CVD. In addition, biomarkers of cardiovascular diseases such as creatin...
Anion exchange resins are important tools for the removal of harmful anionic contaminants from drinking water, but their use has been linked to the presence of carcinogenic nitrosamines in treated drinking water. In bench-scale batch and column experiments, anion exchange resins from a large, representative group were investigated as sources of the nitrosamines N-nitrosodimethylamine (NDMA), N-...
This study investigated the fate of eight N-nitrosamines during membrane bioreactor (MBR) treatment. The results suggest that biodegradation is mainly responsible for the removal of N-nitrosamines during MBR treatment. Other removal mechanisms were insignificant (e.g. adsorption to sludge) or not expected (e.g. photolysis and volatilization) given the experimental conditions and physicochemical...
Abstract:N-nitrosaminesis a kind of poison which can induce cancer. Nitrite can react withsecondary amines to form N-nitrosamines in meat production. The objective of this experiment was to study N-nitrosamines formation ofthree kinds offermentationcelery powder (FCP506, FCP504, and FCP-homemade) and nitritein vitro nitrosation reaction system bydifferent pH, temperature, and the ratio of the s...
Malt and its derivative products are of particular concern and beer represents (along with fried bacon and tobacco) the major source of ingested nitrosamines in humans. Historically, malt was roasted over open fires and the nitrogen oxide gases in the smoke would react with amines in the malt to form nitrosamines. Modern malt production uses indirect fire roasting and the levels of nitrosamines...
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