Browning reaction systems as sources of mutagens and antimutagens.

Browning reaction systems as sources of mutagens and antimutagens.

Heated food systems contain hundreds of chemical compounds, some being mutagenic and others being antimutagenic. Studies have indicated that foods exposed to drying, frying, roasting, baking, and broiling conditions possess net mutagenic activity as assessed by the Ames/Salmonella/microsome mutagenicity test and the chromosome aberration assay with Chinese hamster ovary (CHO) cells. With the ab...

Chemistry of Maillard reactions: recent studies on the browning reaction mechanism and the development of antioxidants and mutagens.

Self-incompatibility systems as bioassays for mutagens

Many flowering plants are unable to set seeds with their own pollen because a system known as gametophytic self-incompatibility is operating. The basis of this system is a single multiallelic locus S, and if the S allele carried by a pollen grain matches one of the two S alleles carried in the style, as it is certain to do upon self-pollination, then pollen tube growth is inhibited. Should one ...

investigation of single-user and multi-user detection methods in mc-cdma systems and comparison of their performances

در این پایان نامه به بررسی روش های آشکارسازی در سیستم های mc-cdma می پردازیم. با توجه به ماهیت آشکارسازی در این سیستم ها، تکنیک های آشکارسازی را می توان به دو دسته ی اصلی تقسیم نمود: آشکارسازی سیگنال ارسالی یک کاربر مطلوب بدون در نظر گرفتن اطلاعاتی در مورد سایر کاربران تداخل کننده که از آن ها به عنوان آشکارساز های تک کاربره یاد می شود و همچنین آشکارسازی سیگنال ارسالی همه ی کاربران فعال موجود در...

Hycanthone and its congeners as bacterial mutagens.

Hycanthone methanesulfonate (HCT) was shown to induce "forward" and "reverse" mutations in Salmonella typhimurium and Escherichia coli. Mutational effects of HCT on S. tyhhimurium TA1532 were concentration and time dependent. A comparison of mutagenic potency for TA1532 was made between HCT and the frame-shift mutagens quinacrine and ICR-191. An investigation of structure-activity relationships...