scholarly journals Direct Determination of the Mutation Rate in the Bumblebee Reveals Evidence for Weak Recombination-Associated Mutation and an Approximate Rate Constancy in Insects

2016 ◽  
Vol 34 (1) ◽  
pp. 119-130 ◽  
Author(s):  
Haoxuan Liu ◽  
Yanxiao Jia ◽  
Xiaoguang Sun ◽  
Dacheng Tian ◽  
Laurence D. Hurst ◽  
...  
Keyword(s):  
Mutation Rate ◽  
Direct Determination ◽  
Approximate Rate

scholarly journals Increased Mutation Rate of E. coli K12λ Cultures Maintained in Continuous Logarithmic Growth

1966 ◽  
Vol 50 (2) ◽  
pp. 369-377 ◽  
Author(s):  
John H. Northrop
Keyword(s):  
Mutation Rate ◽  
Direct Determination ◽  
Growth Curves ◽  
Culture Cell ◽  
Mutation Rates ◽  
E Coli ◽  
Fraction Method ◽  
Logarithmic Growth ◽  
Resistant Cells

Continuous logarithmic growth of E. coli K12λ in an automatic culture cell resulted in marked increases in the proportion of several mutants. The P1 phage-resistant cells increased 10 to 3000 times, the T2 phage-resistant cells 1 to 1000 times, the neomycin-resistant cells 1 to 10 times, and the virus-producing cells 30 to 70 times. No change occurred in the penicillin-resistant cells. Calculation of the growth curves and direct determination of the mutation rates by the null fraction method showed that the increases in the proportion of mutants were due to increases in the mutation rates.

scholarly journals Direct determination of the point mutation rate of a murine retrovirus.

1992 ◽  
Vol 66 (6) ◽  
pp. 3683-3689 ◽  
Author(s):  
R J Monk ◽  
F G Malik ◽  
D Stokesberry ◽  
L H Evans
Keyword(s):  
Point Mutation ◽  
Mutation Rate ◽  
Direct Determination

The Direct Determination of I131 in Heterogeneous Fecal Specimens

1961 ◽  
Vol 41 (4) ◽  
pp. 380-384 ◽  
Author(s):  
Arthur F. Dratz ◽  
James C. Coberly
Keyword(s):  
Direct Determination

A New Method for Direct Determination of the Recoilless Fraction with Application to Magnetic Nanoparticles

2002 ◽  
Vol 721 ◽  
Author(s):  
Monica Sorescu
Keyword(s):  
Room Temperature ◽  
Average Particle Size ◽  
Direct Determination ◽  
Average Particle ◽  
Lattice Method ◽  
Recoilless Fraction ◽  
Single Room ◽  
Magnetite Particles ◽  
Physical Mixtures

AbstractWe propose a two-lattice method for direct determination of the recoilless fraction using a single room-temperature transmission Mössbauer measurement. The method is first demonstrated for the case of iron and metallic glass two-foil system and is next generalized for the case of physical mixtures of two powders. We further apply this method to determine the recoilless fraction of hematite and magnetite particles. Finally, we provide direct measurement of the recoilless fraction in nanohematite and nanomagnetite with an average particle size of 19 nm.

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