ในปี ค.ศ. 1958 Meselson และ Stahl ไ

Meselson and Stahl in 1958, has made a study of the replication process.E. coli bacteria's DNA in a radioactive substance which is using more weight the N14 N15.Normally used as a mark.The trial procedures.E. coli bacteria in 1. pet food that contains multiple versions of the N15 to bacterial DNA in all cells until N15 DNA.2. move the bacteria feed on the food is the usual N14.3. let the bacteria cell splitting into 3 editions.4. study the weight of DNA by spinning machine spinning Sling Sling. At high speed.

In the year 1958 Meselson and Stahl studied the replication
of DNA in E. coli using radioactive N15 to N14, which weigh more than
the usual. Being
an experimental procedure
first. E. coli bacteria in food are multiple versions of the N15 and N15 DNA is the DNA of the bacteria cells
2. Move the bacteria were grown in a normal N14
3. Let the bacterial cell division to the third generation
of water 4. hard of DNA by centrifugation with high speed Centrifuge.

In A.D. 1958 Meselson Stahl study and simulation process of DNA myself
in bacteria E. Coli using substances กัมมัน Trang color N15. Which weighs more than N14 that
used normally marks a step experiment 1. Treat

. Bacteria E.Coli in food with N15 over several generations until DNA of bacteria every cell is N15 DNA
2. Move bacteria cultured with conventional cooking N14
3.? Let the bacteria cell division to 3 version
4.Study of heavy water DNA by centrifugation with high speed centrifuge