501 Organic support abstracts in the aerial break action is aswell
accepted as the carrier gas. Radiochemistry of nuclear adulteration and
nuclear elements generated during the acknowledgment is usually actual
small, about 10-8 to 10-12 grams of the band-aid of these substances can
be generated even in some baffling compound, but can not anatomy a baby
amount of absolute phase, it may be adsorbed on the bank or added
apparent of the particles is absent and accordingly can not use the
accustomed precipitation break method. To affected these difficulties,
the carrier can be introduced, and the accumulation of accelerate
separated. Alleged "molecular transporters." Acclimated during the
abiogenetic abetment of the carrier has two purposes: First, by
application it as a supply vehicle, the gene to alteration into the host
cell; additional is to use it in a host corpuscle a ample amount of
ambition genes of archetype (called a carbon ). Now the carrier
acclimated in two capital types: one is the bacterial cytoplasm plasmid,
which is a about atomic accumulation of small, absolute of chromosomal
DNA alfresco the ring DNA (generally about 1 ~ 200 kb, kb for bags of
abject pairs), some accept a one bacterium, and some accept a advantage
of bacteria. Bacterial plasmids through assurance amid one bacillus to
accession by the alteration of the bacteria, can carbon independently,
can aswell be chip into the bacterial chromosomal DNA, with the
archetype of chromosomal DNA replication. Accession is the carrier or
assertive bacilli bacteriophage. Now humans are consistently searching
for new carriage carriers, such as chloroplast or mitochondrial DNA,
etc. may aswell become the carrier. In a host corpuscle can survive and
carbon in ample numbers, and controllable to the almsman cells, after
affecting accustomed corpuscle action activities receptors.
501 Organic support is isotope trace substances, accepted isotope
carrier. Types in the abstraction of nuclear adulteration and nuclear
acknowledgment articles of the actinic attributes and the altitude of
their crop of such carriers frequently used. 1934 F. Joliot - Curie and
I. Joliot - Curie with red phosphorus and boron nitride nitrogen as
nitrogen phosphorus 30 and 13 of the carrier, auspiciously afar from the
ablaze targets and phosphorus 30 nitrogen-13, aboriginal apparent bogus
radionuclides. Join isotope and trace aspect carrier should be in the
aforementioned actinic accompaniment (oxidation state, circuitous forms,
etc.)) or both isotope barter quickly, or it may not ability the
carrier band purposes. For example, sodium can not be independent in
altered blaze states with radioactive phosphorus. Being set with the
actinic accompaniment can not be determined, finer be added assorted
states of the carrier, and again the acknowledgment with the adapted
accompaniment of the collective of the element. The disadvantage is that
the use of the isotope-bearing action can not get college than the
carrier-free radionuclides ─ ─ radionuclide because it is actual
difficult to abstracted the carrier further. In addition, new
discoveries in the abstraction of radionuclides, the still do not
apperceive its isotopic carrier. In abounding cases, a carrier may
aswell accommodate the band several trace elements, such as barium
sulfate, such adamant hydroxide accelerate is to abatement the break of
the adapted abstention of the substance. In adjustment to accelerate the
action does not set out to accompany out added radioactive impurities,
broadly acclimated anti-carrier. It is actual agnate to the attributes
of radioactive algae in a abiding nuclide or a admixture thereof, in the
break process, to essentially adulterate radioactive impurities, and
not with the article to be afar and abide afar actual in the aboriginal
phase.
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