objective: dracocephalum kotschyi (lamiaceae family) has been usedin traditional medicine for stomach and liver disorders, headache and congestion. in the present study, we have investigated phytochemical properties and antioxidant activities of dichloromethane, ethyl acetate and methanol extracts of d.kotschyi. material and methods: antioxidant activities of extracts were evaluated using the i...

gc-fid and hplc-dad were developed for determination of menadione (mn) and menadione sodium bisulphite (msb). by means of each method, quantitative analysis of msb in commercial pharmaceutical was performed in both direct analysis of msb and analysis of mn by converting msb to mn with sodium carbonate. gc-fid method was carried out on the hp-5 capillary column using nitrogen gas. hplc-dad metho...

prevent cancer by either inhibiting estrogen action or by modulating hepatic metabolism. D-limonene, found in a variety of plants and concentrated in citrus peel oils, also inhibits carcinogen-induced rat mammary tumors by altering both phase I and phase II hepatic enzymes. There is an excellent chapter entitled "Regulation of Carcinogens and Mutagens in Foods in the United States." The current...

oligosaccharide prepared from Pl.-B was eluted as a single peak on both reversed-phase {RP-) HPLC and size-fractionation (SF-) HPLC, and its strueture was estimated to be Manoct-qManal -. 3)(Xylfi1-.2) Manfi1-4GlcNAcfi1-4(Fuc=1-3)GlcNAc by a combination of component analysis, successive exogl)'cosidase digestions, IS-MS anal)'sis, and 500MHz 'H-NMR, Two tryptic gl)'copeptides were isolated from...

The principles involved in the selection of solvents and the use of counter ions, together with the choice of column, for the separation of phospholipids by highperformance liquid chromatography (HPLC) are described.

Penyakit tuberkulosis merupakan suatu gangguan pernapasan yang menular dan penyebabnya dari adanya infeksi bakteri Mycobacterium Tuberkulosis (bakteri aerob). Pengobatan tuberculosis biasa digunakan obat lini pertama yakni isoniazid, rifampisin, etambutol pirazinamid. Tujuan penelitian ini adalah untuk meninjau efektivitas pengembangan metode HPLC atau UPLC dengan detektor UV MS konsentrasi dal...

1 Summary This proposal was for a combined computer simulation and experimental study to develop new tools for designing and optimising chiral HPLC. Of particular interest was to show that it is now feasible to perform realistic molecular simulations of HPLC, and that such simulations can aid in the design and optimisation of HPLC columns. In particular, it was proposed to carry out a combined ...