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dna
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I am Avery small person not a heavy smoker how do you get weed out of your system?
TCH is the chemical in weed that drug tests test for. Luckily for you TCH is stored in fat cells within the body, so the less fat a person is the less time TCH stays in your body. The best way to get TCH out of your system is to work out hard for a couple of days (burning fat) and to drink alot of water (flushes your system). If it makes you feel any better I smoked a lot of weed and then stopped for a drug test. I worked out hard for 8 days straight and drank water until it hurt. I passed the drug test no problem.
What are the applications of complexometric titration?
The Applications of Complexometric Titrations are as follows:1. Direct Titration: It is the simplest and the most convenient method in which thestandard solution of EDTA is slowly added to the metal ion solution till the endpoint is achieved. It is similar to simple acid-base titrations. For this method tobe useful the formation constant must be large and the indicator must provide avery distinct color change as mentioned earlier. Further we need standardizedsolution of EDTA and sometimes auxiliary complexing agents may be required.Some important elements which could be determined directly by thecomplexometric titration are Cu, Mn, Ca, Ba, Br, Zn, Cd, Hg, Al, Sn, Pb, Bi, Cr,Mo, Fe, Co, Ni, and Pd, etc. However, the presence of other ions may causeinterference and need to be suitably handled.2. Back Titration: In this method, an excess of a standard solution of EDTA isadded to the metal solution being determined so as to complex all the metal ionspresent in the solution. The excess of EDTA left after the complex formationwith the metal is back titrated with a standard solution of a second metal ion.This method becomes necessary if the analyte precipitates in the absence ofEDTA or reacts too slowly with EDTA, or it blocks the indicator. For example,determination of Mn is done by this method because a direct titration is notpossible due to precipitation of Mn (OH)2. The excess EDTA remaining aftercomplexation, is back titrated with a standard Zn solution using Eriochromeblack T as indicator. However, one has to ensure the standard metal ion shouldnot displace the analyte ion from their EDTA complex.3. Replacement Titration: When direct or back titrations do not give sharp endpoints or when there is no suitable indicator for the analyte the metal may bedetermined by this method. The metal to be analyzed is added to a metal-EDTAcomplex. The analyte ion (with higher Kf′) displaces EDTA from the metal andthe metal is subsequently titrated with standard EDTA. For example, in thedetermination of Mn an excess of Mg EDTA chelate is added to Mn solution.The Mn ions quantitatively displace Mg from Mg-EDTA solution because Mnforms a more stable complex with EDTA.Mn+ + MgY2 - (MY)(n - 4)+ + Mg2+The freed Mg metal is then directly titrated with a standard solution of EDTAusing Eriochrome black T indicator. Ca, Pb and Hg may also be determined bythis method.4. Indirect Titration: Certain anions that form precipitate with metal cations anddo not react with EDTA can be analyzed indirectly. The anion is firstprecipitated with a metal cation and the precipitate is washed and boiled with anexcess of disodium EDTA solution to form the metal complex.Mn+ + H2Y2 - (MY)(n - 4)+ + 2H+The protons from disodium EDTA are displaced by a heavy metal and titratedwith sodium alkali. Therefore, this method is also called alkalimetric titration.For example, barbiturates can be determined by this method.
Oswald Avery and his colleagues showed that the transforming agent in Griffith's experiments was?
DNA
What summarizes the findings of Avery?
DNA is a transforming factor.
How did Avery help our understanding of genetics?
He showed that DNA is a Transforming factor.
What did Avery's experiments add to the knowledge gained from Griffith's experiments?
American biologist Oswald Avery and his colleagues took Griffith's experiments one step further. To test whether protein was the transforming factor, they treated Griffith's mixture of heat-treated deadly strain and live harmless strain with protein-destroying enzymes. The bacterial colonies grown from the mixture were still transformed. Avery and his colleagues concluded that protein could not be the transforming factor.
How did Avery help build our understanding of genetics?
He showed that DNA is a Transforming factor.
What was Avery conclusion?
Discovered the double-helix(DNA)
Was Oswald Avery awarded a Nobel Prize?
No, Oswald Avery was not awarded a Nobel Prize during his lifetime. However, his groundbreaking research on the transforming principle of DNA laid the groundwork for future discoveries in genetics and molecular biology.
When did Oswald Avery die?
Oswald Avery died on 1955-02-02.
Did oswald Avery die?
Oswald Avery died on 1955-02-02.
What did Oswald Avery's experiment prove?
Oswald Avery proved that DNA and not proteins were the source of genetic material.
How did avery build on griffiths work?
Avery experimented with the transforming principle
How did Oswald Avery die?
Oswald Avery was diagnosed with liver cancer in 1954. He died on February 20th, 1955 from liver cancer. He was 77.
