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1 If mutagens like cosmic rays are present then all normal mutation rates are boosted.

2 However, BIS was to take bleomycin as a mutagen to reflect the sensibility of lymphocyte to the mutagen.

3 Methods: To mutate breeding for strain by chemical mutagen. Its producing resistant ability and propagating stability of strain obtained by screening was observed by shaking flask test.

4 The pre-ozonation can strengthen the removing effect of mutagen in the subsequent craft.

5 Insertional mutagenesis is a method for identifying genes by using the integration of DNA as the mutagen , thereby facilitating the cloning of the mutated gene.

6 Ion implantation as a new mutagen caused high mutation rate and wide mutational spectrum with low damage, and it was also mutated in the direction.

7 A mutagen is very often used to accelerate this process.

8 The mutagen precursors in shrimp sauce were extracted with isopropyl alcohol and acetone. Crude extracts No. 5 and No. 6 had obtained.

9 Alternatively using mutagenic methods by mutagen Nitrosoguanidine(NG)and Ultra violet(UV),(www.Sentencedict.com) S. 301 strain of salmonella bovismorbificans was sift out.

10 The structure and nature of mutagen in the water can be changed by microbiological during the pre-treatment.

11 This is a worthwhile approach, though one should bear in mind that different mutagens give qualitatively different kinds of mutation.

12 If this shows a lethal mutation it is classified as a presumed mammalian mutagen.

13 The committee recommends a two-tier system of tests for identifying mutagens.

14 The result of mice experiment indicated that VC may be a mutagen, and may be toxic in reproduction and memory.

15 Purpose:To study the metabolic role of primary tissue cells in detecting indirect mutagen .

16 Spirulina platensis was induced by ultraviolet irradiation as a mutagen. Two good mutants, M1-3 and M5-1, were selected.

17 Therefore, it is urgent to enhance the genetic traits of chilling resistance in watermelon by the ways of combination of chemical mutagen and somaclonal variation.

18 This work provided a new method for posting the mutagenic mechanism, investigating comprehensive effect of mutagen on the growth of microorganism and monitoring the mutagenic growth process.

19 It would be possible to use this breed of Vicia faba for detecting other mutagen damage and pollution of the environment.

20 It can not only cause the acute toxicity to fishes, but also cause the fish embryo - larva teratogenicity. At the same time it is mutagen to fishes.

21 The International Aflatoxin B1 (AFB1) is by far the most potent teratogen, mutagen and hepatocarcinogen of all aflatoxins.

22 Therefore, it is urgent to enhance the genetic traits of chilling resistance in watermelon by one way of somaclonal variation combined with physical mutagen.

23 Chromosome analysis is an important and difficult task in clinical diagnosis, mutagen dosimetry and biological research.

24 This study treating seeds of vicia faba in 4NQO aberration, study it mutagen effect.

25 In addition, such method was compared with other genotoxicology method in order to probe into the possibility of utilizing such technology to detect environment mutagen.

26 The main results are as follows:(1) Treated by ultraviolet ray and chemical mutagen, 50 isolates were obtained from isolate BC4's conidial suspension.

27 With different concentrations of sewage and aluminum sulfate as a mutagen, pea root tip cells in the mitotic index, micro-rate and the rate of chromosomal aberrations are determined.

28 The paper mainly deals with the chromosome doubling method and mutagen types for medicinal plants and other factors affecting chromosome doubling.