| The alternating appearance of electric field and magnetic field forms an electromagnetic field.There is mutual conversion of electric field energy and magnetic field energy in the electromagnetic field,and the electromagnetic wave as its motion form,in addition to carrying energy,is often used as a carrier of information transmission.The development of modern society has widely used two forms of electromagnetic fields.On the one hand,electromagnetic is used to bring energy,such as power transmission,the use of household appliances such as air conditioners,and televisions.On the other hand,it is information transmission.In the communications industry,electromagnetic waves are used Widely,such as mobile phones,TV broadcasts,wireless routing,etc.everywhere use electromagnetic waves to transmit information,so there are electromagnetic fields everywhere in people's lives and are closely related to people's lives.It is precisely because of the emergence of a large number of unnatural electromagnetic environments that people are more exposed to the complex electromagnetic environment,and electromagnetic radiation has made people pay more attention to their health.Electromagnetic biological effects are mainly divided into thermal effects and non-thermal effects,thermal effects such as infrared heating,and non-thermal effects such as apoptosis caused by excessive X-ray irradiation.The electromagnetic biological effects are also manifested at different levels of organisms,from changes in the body's tissues and organs that can be observed with the naked eye,to the life activities of cells,to possible effects on genes,especially at the genetic level,the naked eye cannot Observation,long-term accumulation of harmful changes will cause serious lesions on the body,and even inherit harmful genes to the next generation,and the final form of DNA is protein.It is of great significance to study the effects of electromagnetic radiation on DNA.The common DNA is a double-helix structure type,a macromolecule with polar biology,and the four bases that make up the DNA also have a polar distance.In the human body,water occupies about 70% of the body weight,and the water molecule is also a polar Sex molecules,and these substances exhibit different electrical characteristics on the macro level,such as impedance characteristics,electrical conductivity characteristics,and dielectric characteristics,especially the dielectric characteristics,which have a strong advantage in reflecting the microstructure of the substance,and the measurement The characteristics of high sensitivity and non-invasive,so this paper uses the method of dielectric spectroscopy to study the effect of external field on DNA and protein.The main research objects of this article are calf thymus DNA and bovine serum albumin(BSA).The dielectric properties of the two biological samples were studied at different temperatures,different concentrations,and external static magnetic fields and electrostatic fields.The main contents are divided into the following Several parts:(1)Introduce the physical and chemical structure of DNA and bovine serum albumin,analyze the intermolecular force,and the movement state of water molecules and ions under the action of external field;(2)Build the experimental system In the absence of an external field,the electrical properties of the DNA and bovine serum albumin solutions were measured,and the formulas for the relationship between DNA dielectric constant and dielectric loss with concentration were fitted,and the bovine serum albumin dielectric constant was also fitted.Formulas that are linearly related to dielectric loss and concentration;(3)Under the action of external static magnetic field,the dielectric parameters of DNA and bovine serum albumin were measured,and the changes in dielectric properties before and after the magnetic field were compared.And the structural change of the polar molecular groups in the solution is analyzed at the level of the deep-seated cause of the change;(4)Under the action of the electrostatic field,the two Reason solution type dielectric parameters were measured and analysis,the electrostatic field changes the dielectric properties of the solution are mainly electrostatic field changes the physical structure in solution.The purpose of this article is to study the influence of external static magnetic field and electrostatic field on the dielectric properties of DNA and bovine serum albumin.The formula for the relationship between dielectric parameters and sample concentration is obtained.The electrostatic field measurement and analysis method is used for the first time.The processed DNA and bovine serum albumin reveal the dielectric properties and laws of the effects of static magnetic field and electrostatic field on the substance,and have important reference significance for electromagnetic biological safety and medical diagnosis. |
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