Release date: 2014-06-26
Thermo Fisher said on the 23rd of this month that the US Federal Bureau of Investigation (FBI) has approved Life Tech's GlobalFiler kit for use in forensic laboratories.
The agency's decision is based on validation data for the product submitted by the Forensic Science Department in Alabama, said Thermo Fisher. In the past year, this is the second DNA kit approved by Thermo Fisher. In October, the FBI approved the GlobalFiler Express kit.
Both GlobalFiler and GlobalFiler Express have 6 colors of fluorescence and 24 loci. GlobalFiler is used to help forensic laboratories get answers and explain the inhibitory substances contained in the sample or the DNA mixture of multiple contributors, etc., Thermo Fisher said.
At the same time, GlobalFiler Express is optimized to handle single source samples such as swab samples obtained from the suspect's cheeks. The kit allows the lab to get an answer within two hours.
Source: Instrument Information Network
Human chorionic gonadotropin is a hormone for the maternal recognition of pregnancy produced by trophoblast cells
Human chorionic gonadotropin (HCG) is a glycoprotein secreted by trophoblast cells of the placenta And β dimer proteins. The molecular weight of glycoprotein hormone 36700, A. Pituitary, FSH, follicle stimulating hormone, LH (luteinizing hormone) and TSH (thyroid stimulating hormone) are basically similar, So they can cross-react with each other, while the structure of β subunit is not similar. In mature women, the fertilized ova move to the uterine cavity for implantation and form embryos. In the process of development and growth into the fetus, the placental syncytiotrophoblast cells produce a large amount of HCG, which can be excreted into urine through the blood circulation of pregnant women. Serum and urine HCG levels rise Rapidly from 1 to 2.5 weeks of gestation, reaching a peak at 8 weeks of gestation and dropping to moderate levels at 4 months of gestation, which remain at the end of gestation. At present, the commonly used detection methods are: latex aggregation inhibition test and hemagglutination inhibition test; Radioimmunoassay (RIA); Enzyme linked immunosorbent assay (ELISA); Monoclonal antibody colloidal gold test
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