A edible red pigment was extracted from the fruit of Hylocereus Costaricensis (Weber) Britt for the first time.A study was conducted to exam technological conditions of extracting the red pigment,including selection o...A edible red pigment was extracted from the fruit of Hylocereus Costaricensis (Weber) Britt for the first time.A study was conducted to exam technological conditions of extracting the red pigment,including selection of soaker and soaking dose,the effect of soaking temperature,pH and soaing time on extracting rate.The results showed that the pigment is soluble in water and the suitable soaker is the ethanol aqueous solution of 70%,and that the extraction should be undertaken by two time of solvent at room temperature for five hours.展开更多
The metabolites and metabolic passways of nitrazepam in rat were confirmed.Wistar rats were feed a pill of nitrazepam,24 h urine reactions were collected.After β-Glucuronidase hydrolysis of the urine samples,the frac...The metabolites and metabolic passways of nitrazepam in rat were confirmed.Wistar rats were feed a pill of nitrazepam,24 h urine reactions were collected.After β-Glucuronidase hydrolysis of the urine samples,the fractions were extracted by Oasis HLB3cc solid-phase column and analyzed by gas chromatography-mass spectrometry with DB-35 MS column.7-Acetylaminonitrazepam,7-aminonitrazepam and 2-amino-5-nitrophenylphenylmethanone were identified as nitrazepam metabolites.The results suggested that two metabolic passways for nitrazepam may be operative in rat.The first passway leads to the corresponding 7-aminonimetazepam in which the amino group is subsequently acetylated.The second passway is open the parent compounds rings to 2-amino-5-nitrophenylphenylmethanone.Nitrazepam was metabolized quickly in rats and 7-acetylaminonitrazepam were the main metabolites in urine.展开更多
文摘A edible red pigment was extracted from the fruit of Hylocereus Costaricensis (Weber) Britt for the first time.A study was conducted to exam technological conditions of extracting the red pigment,including selection of soaker and soaking dose,the effect of soaking temperature,pH and soaing time on extracting rate.The results showed that the pigment is soluble in water and the suitable soaker is the ethanol aqueous solution of 70%,and that the extraction should be undertaken by two time of solvent at room temperature for five hours.
文摘The metabolites and metabolic passways of nitrazepam in rat were confirmed.Wistar rats were feed a pill of nitrazepam,24 h urine reactions were collected.After β-Glucuronidase hydrolysis of the urine samples,the fractions were extracted by Oasis HLB3cc solid-phase column and analyzed by gas chromatography-mass spectrometry with DB-35 MS column.7-Acetylaminonitrazepam,7-aminonitrazepam and 2-amino-5-nitrophenylphenylmethanone were identified as nitrazepam metabolites.The results suggested that two metabolic passways for nitrazepam may be operative in rat.The first passway leads to the corresponding 7-aminonimetazepam in which the amino group is subsequently acetylated.The second passway is open the parent compounds rings to 2-amino-5-nitrophenylphenylmethanone.Nitrazepam was metabolized quickly in rats and 7-acetylaminonitrazepam were the main metabolites in urine.
