The Analysis Of Composition And Texture Between Different Species Dendrobium Nobile Lindls

Dendrobium nobile Lindl is a well-known precious herbs in China.Its effect meet the need of people who pursuing health.Nowadays,more and more consumers attach importance to Dendrobium nobile Lindl's heath care food,but different kinds of products'ingredients and contents also have great difference,so their functional ingredients and treatment effects are quite different,which lead to a great difference in price between different kinds of Dendrobium nobile Lindl.The source of origin of Dendrobium nobile Lindl are complicated,and different regions'medication situations are different and chaos.In folk,in addition to some breeds which have been record in pharmacopoeia,there are also many other kinds of fake products and defective products.When people medicate,they may find that Dendrobium nobile Lindl's source and breed can make a great different to its effect?sensory evaluation?use value?economic value.These factors can discourage related goods'exploitation and deeply effect related industries'development.Currently,the evaluation system of Dendrobium nobile Lindl is immature and we lack a standard method which is systematic,convenient,exhaustive and wide application.In conclusion,we need to develop a easy,quickly and reliable quality evaluation method of Dendrobium nobile Lindl.This essay select 5 kinds of Dendrobium nobile Lindl which grow in Longling County,Baoshan,Yunnan Province.The research objects including some breeds which have been record in pharmacopoeia?Dendrobium Chrysotosum Lindl,Harba Dendrolii Nobilis,Dendrobium fimbriatum Hook,Dendrobium officinale Kimuraet Migo?and Dendrobium devonianum Paxt which has a high marker share recently.Through comparing different breeds'active ingredients?sensory quality and texture index,we can make the following conclusions:?1?We can see a great difference between different breeds'products'dry goods in hardness?shear force?shear displacement.Its serum's Viscosity,consistency,color also different.?2?The content of active ingredients in different breeds are different:the content of polysaccharide is between 2.43%and 21.12%.Dendrobium Fimbriatum Paxt rank the first,and next comes to Dendrobium officinale Kimuraet Migo.The content of Flavone is between 0.05%and 0.24%,Harba Dendrolii Nobilis rank the first.The content of Alkaloids is between 0 and 0.038%,the figure for Dendrobium officinale Kimuraet Migo rank the first,but cannot be seen in the products of Dendrobium devoniaum Paxt.The content of soluble solids is between 0.44%and 2.37%.The content of water soluble leachables and alcohol soluble leachables are 7.10%¹5.18%and 0.8%¹1.08%,respectively.?3?Making a stepwise regression analysis with some physical property index?hardness?shear force?shear displacement?and the content of polysaccharide,we set up a related model:Y=-4.79+0.15X1?X₁:viscosity?;the main factor that can influence the content of polysaccharide is hardness.?4?Making a stepwise regression analysis with some physical property index?viscosity and consistency?and the content of polysaccharide,we set up a related model:Y=11.274+3.152X1+0.776X2?X₁:viscosity,X₂:consistency?.The main factor that can influence the content of polysaccharide is viscosity and consistency rank 2^rd.?5?Different breeds'polysaccharide molecular weight and its distribution have great difference.Dendrobium nobile Lindl Polysaccharide's weight average molecular weight is between 3.796 and 683.662Kda.Dendrobium officinale Kimuraet Migo's weight average molecular weight is heaviest,and its distribution coefficient D is much higher than 1,so we can conclude that Dendrobium nobile Lindl's Polysaccharide have many ingredients,belonging hetero polysaccharide.The molecular weight between other breeds of Dendrobium nobile Lindl is that:S4-Dendrobium fimbriatum Hook>S3-:Harba Dendrolii Nobilis>S2-Dendrobium Chrysotosum Lindl>S1-Dendrobium devonianum Paxt.Their distribution coefficient D are closed to 1,so They are pure polysaccharide.?6?The consistent of different breeds of Dendrobium nobile Lindl Monosaccharide are similar.They have 7 kinds of Monosaccharide,including Mannose,Glucose,Arabic candy.The peak area ratio of different breeds of Dendrobium nobile Lindl's Mannose and Glucose between 0.45 and 0.68,both lower than specified value of pharmacopoeia.