Detection method of preservative residues in fruit and vegetable preservation
Time of Update: 2022-03-17
At present, GC-MS technology has been incorporated into national standards, such as GB/T 19648-2006 (Determination of 500 Pesticides and Related Chemical Residues in Fruits and Vegetables by Gas Chromatography-Mass Spectrometry", with up to 500 detected components .
One Reading: The Gold Standard of Tumor Diagnosis---Pathological Diagnosis
Time of Update: 2021-08-07
Molecular pathology: technical route-FISH fluorescence in situ hybridization (FISH) is based on the principle of base complementation, using nucleic acid probes directly or indirectly labeled with fluorescein to detect interphase nuclear staining on tissue sections, cell smears, and chromosome spreads Qualitative and relative quantitative analysis and detection technology are carried out for qualitative, quantitative and structural changes .
Analysis of Thylakoid Protein Complexes by Two-Dimensional Electrophoretic Systems
Time of Update: 2021-03-13
Such plasticity in the composition of the thylakoid membrane protein complexes guarantees efficient function of the photosynthetic machinery.
In this chapter, we describe methods for separation of thylakoid membrane protein complexes at high resolution by two-dimensional gel electrophoretic systems.
Gel-Capillary Electrophoresis Analysis of Oligonucleotides
Time of Update: 2020-12-16
Gel-capillary electrophoresis is a new alternative to traditional electrophoretic techniques for the analysis of oligonucleotides ( 1 – 5 ).
Slab gels (PAGE), on the other hand, are visualized at a single time point in the analysis, do not easily yield to integrative quantitation, and are thus asubjective method of analysis.
Covalent Coupling of DNA Oligonucleotides and Streptavidin
Time of Update: 2020-12-03
SemisyntheticDNA -protein conjugates are synthesized by covalent coupling of thiol-modified DNA oligonucleotides and streptavidin.
The conjugates are purified to homogeneity by ultrafiltration and chromatography and characterized by photometry and gel electrophoresis.