The pigment of the fruit of Hylocereus Costaricensis(Weber)Britt was studied for its stability influenced by the additive agent for food,oxidizer and common metal ions.The research showed that sugar,starch and K...The pigment of the fruit of Hylocereus Costaricensis(Weber)Britt was studied for its stability influenced by the additive agent for food,oxidizer and common metal ions.The research showed that sugar,starch and K+,Na+,Mg2+ can intensify the pigment colour,benzonic acid,ascorbic acid,and Zn2+ do not have bad influence on the pigment,but Fe3+,Cu2+ and oxidizer can make the pigment instable.展开更多
In this paper,dehydroabietic acid was isolated and purified from disproportionated rosin at first.Then,sucrose dehydroabietic acid esters were synthesized through the esterification reaction of methyl dehydroabietate ...In this paper,dehydroabietic acid was isolated and purified from disproportionated rosin at first.Then,sucrose dehydroabietic acid esters were synthesized through the esterification reaction of methyl dehydroabietate with sucrose in DMF solvent by using the dehydroabietic acid as starting material.Some synthetic conditions were investigated,and the target product was analyzed and identified by IR and TLC.Besides,some surface properties of the target product such as the surface tension,critical micelle concentration and emulsion capability were determined.The prepared sucrose dehydroabietic acid esters were novel nonionic surfactants.展开更多
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
文摘The pigment of the fruit of Hylocereus Costaricensis(Weber)Britt was studied for its stability influenced by the additive agent for food,oxidizer and common metal ions.The research showed that sugar,starch and K+,Na+,Mg2+ can intensify the pigment colour,benzonic acid,ascorbic acid,and Zn2+ do not have bad influence on the pigment,but Fe3+,Cu2+ and oxidizer can make the pigment instable.
文摘In this paper,dehydroabietic acid was isolated and purified from disproportionated rosin at first.Then,sucrose dehydroabietic acid esters were synthesized through the esterification reaction of methyl dehydroabietate with sucrose in DMF solvent by using the dehydroabietic acid as starting material.Some synthetic conditions were investigated,and the target product was analyzed and identified by IR and TLC.Besides,some surface properties of the target product such as the surface tension,critical micelle concentration and emulsion capability were determined.The prepared sucrose dehydroabietic acid esters were novel nonionic surfactants.
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.
