What is the biological and chemical significance of trans unsaturated double bonds in vegetable oils

Trans fatty acids are relatively stable and easy to store. Trans fatty acids are similar in nature to saturated fatty acids.

The structure of fatty acids has changed, and their properties have also changed, and safflower oil, corn oil, and cottonseed oil containing polyunsaturated fatty acids can reduce cholesterol levels in the human blood, but when they are hydrogenated into trans fatty acids, the effect is the opposite.

Alters our body's normal metabolic pathways.

1) Trans fatty acids can increase LDL-C (i.e., low-density lipoprotein cholesterol), and its elevated levels can increase the risk of coronary heart disease; Lowering the levels of HDL-C (i.e., high-density lipoprotein cholesterol) increases the risk of coronary heart disease and therefore coronary heart disease.

2) Trans fatty acids have an inhibitory effect on growth and development: trans fatty acids can interfere with the metabolism of essential fatty acids, inhibit the function of essential fatty acids, and increase the body's demand for essential fatty acids.

3) Trans fatty acids can bind to lipids in body tissues: when combined to cerebral lipids, they will adversely affect the brain development and nervous system development of infants and young children.

4) Trans fatty acids are easy to lead to the occurrence of cardiovascular and cerebrovascular diseases: the inhibitory effect of trans fatty acids on platelet aggregation is lower than that of cis fatty acids, which increases the formation of thrombosis in the body and increases the incidence of embolic cardiovascular and cerebrovascular diseases.

No, the trans double bond is a hydrogenated vegetable oil. Unsaturated fatty acids are cis single bonds.

Yes, only double bonds are OK because a single bond can rotate on its own and the atoms on its carbon are equal, while a triple bond has only one atom adjacent to the carbon, whereas a double bond allows two atoms attached to carbon to rotate each other.

You have to have a double bond, and the single piece is a three-dimensional conformation, and there is no positive and negative type, and the triple bond is a flat type, and it cannot be changed.

In high school chemistry, cis and trans are based on left-right symmetry, and there is no left-right symmetry or asymmetry in single triple bonds.

The interconversion of cis-trans isomerism of double bonds requires energy and even catalysis. It's not that you can turn around.

In cis- and trans-isomers, it is usually trans that is more stable, while cis is more unstable.

By heating or illuminating the cis-isomer, it is easy to convert into a more stable trans-isomer.

For example: maleic acid – heating – >-trans-butylic acid.

It is more difficult to convert trans-butenoic acid into cis isomers, and the best way is to irradiate with ultraviolet light, and the trans isomers absorb energy under ultraviolet light irradiation to convert into cis isomers, and there are usually cis and trans mixtures in the product.

It is impossible for ultraviolet rays and light to exist in the human body, and it can only be catalyzed by enzymes.

However, the human body lacks the enzyme of double bond isomerization, so it cannot be converted.

The chemical elements as well as the substructure are the same, but the isomerism occurs due to the difference in the structure of the compound due to some rigid structure of the compound, most notably the double bond.

There is a set of methods for the definition of cis-inverse, which is to sort according to the atomic number and atomic order, if the two ends of the double bond are on one side of the double bond, it is a cis structure, and vice versa is a trans structure. There is a similar definition in complexes, with planar square structures, most commonly in octahedral structures.

It can be catalyzed hydrogenation (lindrar catalyst must be used, otherwise it will be reduced to alkanes), it can be reduced by borohydride (ethylborane, acetic acid low temperature), it can be reduced with sodium metal in liquid ammonia, and lithium aluminum hydride can be reduced in anhydrous solvents. The first two methods are cis-reduction, and the last two are trans-.

Several structures are omitted in the middle, and repeated methylation is used to form quaternary ammonium salts and quaternary ammonium bases. Thermal elimination is a Hoffmann product.

It is a kind of stereoisomerism, which is caused by the fact that the double bond cannot rotate freely, generally referring to the double bond of alkene, and there are also c=n double bonds, n=n double bonds and cis-trans isomerism of cyclic compounds.

Cis isomer: Two identical atoms or groups on the same side of the double bond are cis isomers, also denoted by cis-.

Trans isomers: Trans isomers that flank two identical atoms or groups on either side of a double bond are trans isomers, also denoted by trans-.

Cis isomer: Two identical atoms or groups on the same side of the double bond are cis isomers, also denoted by cis-.

Trans isomers: Trans isomers that flank two identical atoms or groups on either side of a double bond are trans isomers, also denoted by trans-.

It is a kind of stereoisomerism, which is caused by the fact that the double bond cannot rotate freely, generally referring to the double bond of alkene, and there are also c=n double bonds, n=n double bonds and cis-trans isomerism of cyclic compounds.

The same two groups on the same side of the double bond are cis.

The same two groups are trans on the opposite side of the double bond.

The two larger groups on the double bond are of the z-type on the same side of the double bond.

The two larger groups on the double bond are of type e on the opposite side of the double bond.