Study on Risk Management of Investment on Food and Drug Safety of Fiddlehead
Fiddlehead has been used in traditional Chinese medicine since Han Dynasty. However fiddlehead are still underutilized and hence wasted. In order to better utilize fiddlehead resources, the drug safety of benzene/alcohol extractives from fiddlehead were analyzed by GC/MS. Relative content of each component was determined by area normalization. The main ingredients of benzene/alcohol extractives of fiddlehead were toluene,2-furancarboxaldehyde, 5-(hydroxym ethyl)-, n1-(4-hydroxybutyl)-n3-methylguani dine acetate, 1,3-dihydroxyacetone dimer, sulfurous acid, cyclohexylmethyl hexadecyl ester, 1,4,7,10,13,16-hexaoxanonadecane, 18-propyl-, 1,6-anhydro-.beta.-d-glucopyranose(levoglucosan), oxirane, hexadecyl-, etc. The results obtained fully indicated that the benzene/alcohol extractives of fiddlehead had the great potential of noble natural biomedicines.
Study on Biomedical Resources of Benzene/Alcohol Extractives of Eucalyptus Leaves by GC/MS
Eucalyptus leaves have been used as a common traditional herbal medicine for more than 200 years. In order to further utilize Eucalyptus leaves in biomedicine and put forward new ideas for biomedical manufacturing, the biomedical resources of extractives of Eucalyptus dunnii and Eucalyptus grandis leaves were analyzed by GC/MS. The results showed that: 1) The main constituents of benzene/ethanol extractives in E. dunnii leaves were α-amyrin(9.05%), cyclohexyl-15-crown-5-(6.51%), 1,4,7, 10,13,16-hexaoxanonadecane, 18-propyl-(6.09%), vitamin E (5.83%), 1,19-eicosadiene(5.65%), 1,4-dioxane-2,6-dimethanol(5.32%), coumarin-6-ol, 3,4-dihydro -4,4-dimethyl-7-nitro-(4.42%), 2-furancarboxaldehyde, 5-(hydroxymethyl)- (4.21%), benzene, 1,2,3 -trimethoxy-5-methyl(3.45%), etc. 2) The main constituents of benzene/ethanol extractives in E. grandis leaves were (-)-globulol (7.35%), 1,2,3-benzenetriol(7.17%), D-allose(6.37%), 2- furancarboxaldehyde,5-(hydroxymethyl)-(6.33%), N1-(4-hydroxybutyl)-N3-methylguanidine acetate(5.35%), 1,4,7,10,13,16-hexaoxanonade–cane,18-propyl-(3.95%), vitamin E(3.26%), cyclohexyl-15-crown-5-(3.13%), eucalyptol(2.91%), etc. The results of function analyses suggested that the benzene/ethanol extractives of both E. dunnii and E. grandis leaves were abundant in materials of noble natural biomedicines, and also contained constituents which could be developed into top value-added materials of cosmetics and health care.
THE IRON-ACETOCARMINE METHOD OF FIXING AND STAINING CHROMOSOMES
A short description of this procedure was given in Vol. 55 of the American Naturalist, pp. 573â€”574. The method has now been used almost daily for five years, and certain improvements have suggested themselves. The solution can be prepared by mixing about equal volumes of glacial acetic acid and water. To this is added powdered carmine in excess. The liquid is then â€ ? just brought to boil, cooled, and decanted. To the red solution there are then added a few drops of a solution of ferric hydrate in 50 per cent. acetic acid, to act as a mordant. The amount of iron varies with different objects. Too much produces a precipitate in a short time. The more