A reliable chromatographic strategy is crucial for the extraction of target compounds from natural sources as it related to preparation efficiency, well purity compounds. In this study, medium-pressure normal-phase liquid chromatography and high-pressure reverse-phase were combined prepare purify ergosterol Tulasnellaceae sp. Gymnadenia orchidis. First, was extracted three times (2.0 L 2 h each...

Phellinsin A, a novel chitin synthases inhibitor was isolated from the cultured broth of fungus PL3, which was identified as Phellinus sp. PL3. Phellinsin A was purified by solvent partition, silica gel, ODS column chromatographies, and preparative HPLC, consecutively. The structure of phellinsin A was assigned as a phenolic compound on the basis of various spectroscopic analyses including UV, ...

BACKGROUND α-Mangostin was extracted with methanol from the rind of mangosteen fruit and purified by using silica gel column chromatography technique. The compound is characterised using infrared, (13)C and (1)H NMR as well as UV-vis spectroscopy. The α-mangostin dispersion in colloidal systems was studied by incorporating it with an ionic microgel, poly (N-Isopropylacrylamide)-co-2VP at differ...

Mannich reaction was applied between 4-fluorobezaldehyde, selected acetophenone and several anilines, catalyzed by silica sulfuric acid for the synthesis of β-amino carbonyl derivatives. Reaction time and yield of the products depended on the nature of acetophenone and aniline subsituents. Using aliphatic amines instead of aromatic amines under same reaction conditions, afforded aldol condensat...

To evaluate the protective effects of fruit juices against D-galactosamine (GalN)-induced liver injury, lyophilized fruit juices (total 12 kinds) were fed to rats for 7 d, and then we evoked liver injury by injecting GalN. The juice of camu-camu (Myrciaria dubia) significantly suppressed GalN-induced liver injury when the magnitude of liver injury was assessed by plasma alanine aminotransferase...

We prepared a new stable and water-soluble silicon compound. The potential of this silicon reagent for synthesis of multicomponent oxide materials via a solution based method was demonstrated by preparation of a (Y0.79Ce0.01Gd0.20)2SiO5 blue emission phosphor using a polymerizable complex method. Phase composition and fluorescence properties of the prepared material were compared against a seri...

Single crystals of dizinc tellurium dibromide trioxide, Zn(2)(TeO(3))Br(2), were synthesized via a transport reaction in sealed evacuated silica tubes. The compound has a layered crystal structure in which the building units are [ZnO(4)Br] distorted square pyramids, [ZnO(2)Br(2)] distorted tetra-hedra, and [TeO(3)E] tetra-hedra (E being the 5s(2) lone pair of Te(4+)) joined through sharing of e...

Several natural compounds have been identified for the treatment of leishmaniasis. Among them are some alkaloids, chalcones, lactones, tetralones, and saponins. The new compound reported here, 7-geranyloxycoumarin, called aurapten, belongs to the chemical class of the coumarins and has a molecular weight of 298.37. The compound was extracted from the Rutaceae species Esenbeckia febrifuga and wa...

The product formed by incubation of dolichol monophosphate glucose with liver microsomes was studied. It is insoluble in most solvents, but is soluble in a chloroform-methanol mixture with a high content of water. Treatment with ammonia gave rise to the formation of a water soluble, negatively charged compound of molecular weight 3550. The negative charge could be removed by treatment with phos...

Ginseng damping-off, caused by the fungal pathogens Rhizoctonia solani and Pythium sp., is a critical disease in ginseng seedling. In a continuing effort to find microorganisms with the potential of acting as a biocontrol agent against Rhizoctonia damping-off, we found that a Streptomyces sp. A501 showed significant antifungal activity against Rhizoctonia solani. In field experiment to test the...