Study On The Characteristics Of The Buried Wood Of Phoebe Zhennan In Sichuan

This study systematically studied the physicochemical properties of buried zhennan wood.Firstly,according to the literature,the historical distribution of buried Phoebe zhennan wood and the laws of distribution of gloomy wood in Sichuan were summarized.Then the macroscopic characteristics of buried Phoebe zhennan wood were studied and analyzed in depth from the perspective of microscopic structure.Anatomical structure characteristics of buried Phoebe zhennan wood.Based on this,the chemical composition of buried Phoebe wood was analyzed.Based on the full understanding of the basic characteristics of buried Phoebe zhennan wood,the composition and characteristics of buried phoebe zhennan wood were explored.Finally,artificial accelerated aging and indoor were used.The anti-corrosion test method evaluates the anti-aging properties and corrosion resistance properties of buried phoebe zhennan wood.and the results are as follows:The distribution of phoebe in ancient China is more extensive than it is now,with community distribution and large diameter.With the growth of the population and the level of industrialization advancement,phoebe distribution drastically,from the north of qinling north latitude 35 ° back to the south of qinling mountains north latitude 32 °,gradually shrink to sichuan province;The distribution of phoebe from community distribution to sporadic distribution.there is mainly distributed in the eastern part of China,the southwest,the south and the central region,mainly distributed in river bed,gully and swamp.In sichuan,most of the area has buried wood distribution,while the main area of zhennan is mainly distributed in the area of chengdu plain,ya ’an,yibin,etc.The macroscopical characteristics and microstructural characteristics of the wood are kept in the buried wood,but it is influenced by the burial environment and burial time,and its color and density are different.Compared with zhennan modern wood,the basic density of the buried wood was increased,the value of the color was decreased,the cell wall appeared to be degraded,and the infiltration in the catheter increased,and the mineral filling increased in the wood ray.The regularity of the extraction rate of the buried wood extract of zhennan was acetone extraction(3.73%),> ethanol extraction(3.20%%),> ethyl ether extraction(3.73%).Acetone extract mainly contains mainly Cadalin,5-Methoxy-2-(methoxyme thyl)phenol,1H-Pyrazolo[3,4-d]pyrimidine-4,6(5H,7H)-dione,l-Calamenene,etc.20 of the is given priority to with olefin and aromatic hydrocarbon compounds;The ethanol extract contains a total of 26 compounds,including Spiro[4.5]dec-6-ene-2-metha nol,a,a,6,10-tetramethyl-,(2R,5S,10S)-,Naphthalene,1,2,3,5,6,7,8,8a-octahydro-1-methyl-6-methylene-4-(1-methylethyl)-,3,7-Benzofurandiol,2,3-dihydro-2,2-dimethyl-,1,6-Cycl odecadiene,1-methyl-5-methylene-8-(1-methylethyl)-,(1E,6E,8S)-,and 20 compounds,mainly olefins and aromatic hydrocarbons;Ethyl ether extract is mainly composed o f Spiro[4.5]dec-6-ene-2-methanol,a,a,6,10-tetramethyl-,(2R,5R,10R)-,Cyclohexanemetha nol,4-ethenyl-a,a,4-trimethyl-3-(1-methylethenyl)-,(1R,3S,4S)-,3,7-Benzofurandiol,2,3-di hydro-2,2-dimethyl-,1,6-Cyclodecadiene,1-methyl-5-methylene-8-(1-methylethyl)-,(1E,6E,8S)-.the 22 kinds of compounds were identified by the analysis of the essential oils of buried zhennan,mainly Bicyclo[4.4.0]dec-1-ene,2-isopropyl-5-methyl-9-methyle ne-,Naphthalene,1,2,3,5,6,7,8,8a-octahydro-1,8a-dimethyl-7-(1-methylethenyl)-,[1R-(1.al pha.,7.beta.,8a.alpha.)]-,Cycloisolongifolene,8,9-dehydro-,etc.The extract(solvent extr act,essential oil)has good thermal stability and bacteriostasis,as well as the ability to absorb ultraviolet.It has good aging resistance and is resistant to brown rot fungus.