Background:Sapindus mukurossi extract(SME)is a kind of natural surface active ingredient with potential applications in cleansing products.However,the polyphenols and pigments contained in the extract may cause color ...Background:Sapindus mukurossi extract(SME)is a kind of natural surface active ingredient with potential applications in cleansing products.However,the polyphenols and pigments contained in the extract may cause color browning of the products during storage especially at elevated temperatures,affecting its high level addition in the products.Objective:To explore a decolorization process suitable for industrialization realize the high level addition of SME and explore the potential of SME in the field of controlling sebum esters.Materials and Methods:SME was prepared by adsorbing polyphenols on the D301 resin and oxidation decoloring oxidation.Investigated its sebum-control efficacy by SZ95 model and clinical study.Results:The results demonstrate that the D301 resin displays the best adsorption selectivity for polyphenols in SME,and the polyphenol adsorption ratio of D301 resin(5 wt%)can reach 83.6%;The optimal decolorization conditions are pH=7.8,temperature 73℃and decolorization time 5.7 h when H2O2 content is 6%,The prepared SME shows no obvious changes in color and retain stable during the high temperature(50℃)test period of 28 days.4μg/mL of SME decreases the lipid synthesis of SZ95 cells by 24.8%.The clinic efficacy of the shampoo containing 10%SME(by dry extract weigh)is further evaluated.No significant changes in the skin moisture content and transepidermal water loss(TEWL)are observed within four weeks after using the product,while the scalp sebum level is significantly reduced.Conclusion:In this study,we prepared a light-colored,highly stable SME,enabled its high-level addition in cleansing and care products and found its sebum-control efficacy.展开更多
[Objective] To screen out a microbial flocculant with good decolorization effect on methyl orange wastewater,and study the effect of different cultural conditions on decolorization effect of methyl orange.[Method] Abs...[Objective] To screen out a microbial flocculant with good decolorization effect on methyl orange wastewater,and study the effect of different cultural conditions on decolorization effect of methyl orange.[Method] Absorbance of methyl orange solution before and after decolorization was determined by spectrophotometer,and the decolorization rate was calculated to compare the effects of different cultural conditions on removal rate of methyl orange.[Result]An optimal actinomycete stain（F-1-2） was screened out,and the best cultural condition was as follows：with sucrose as carbon source and NaNO3 as nitrogen source,cultured in constant temperature oscillator at 150 r/min,30℃ for 72 h.Under the optimal condition,the removal rate against methyl orange could reach 68.4%.[Conclusion]Different culture conditions have great impact on decolorization effect of strain.展开更多
A crystalline sapphire （Al2O3） boule （Ф10 × 80mm^3） grown by the temperature gradient technique （TGT） is a bit colored due to carbon volatilization from the graphite heater at high temperatures and the abs...A crystalline sapphire （Al2O3） boule （Ф10 × 80mm^3） grown by the temperature gradient technique （TGT） is a bit colored due to carbon volatilization from the graphite heater at high temperatures and the absorption of transitional metal inclusions in the raw material. The sapphire becomes colorless and transparent after decolorization and decarbonization in successive annealings in air and hydrogen at high temperatures. The quality, optical transmissivity,and homogeneity of the sapphire are remarkably improved.展开更多
文摘Background:Sapindus mukurossi extract(SME)is a kind of natural surface active ingredient with potential applications in cleansing products.However,the polyphenols and pigments contained in the extract may cause color browning of the products during storage especially at elevated temperatures,affecting its high level addition in the products.Objective:To explore a decolorization process suitable for industrialization realize the high level addition of SME and explore the potential of SME in the field of controlling sebum esters.Materials and Methods:SME was prepared by adsorbing polyphenols on the D301 resin and oxidation decoloring oxidation.Investigated its sebum-control efficacy by SZ95 model and clinical study.Results:The results demonstrate that the D301 resin displays the best adsorption selectivity for polyphenols in SME,and the polyphenol adsorption ratio of D301 resin(5 wt%)can reach 83.6%;The optimal decolorization conditions are pH=7.8,temperature 73℃and decolorization time 5.7 h when H2O2 content is 6%,The prepared SME shows no obvious changes in color and retain stable during the high temperature(50℃)test period of 28 days.4μg/mL of SME decreases the lipid synthesis of SZ95 cells by 24.8%.The clinic efficacy of the shampoo containing 10%SME(by dry extract weigh)is further evaluated.No significant changes in the skin moisture content and transepidermal water loss(TEWL)are observed within four weeks after using the product,while the scalp sebum level is significantly reduced.Conclusion:In this study,we prepared a light-colored,highly stable SME,enabled its high-level addition in cleansing and care products and found its sebum-control efficacy.
基金Supported by National Natural Science Foundation of China(51064011)Jiangxi Education Science " Twelfth Five-year" Planning Program (10YB335)Science Foundation for Youths of Jiangxi Educational Committee (GJJ09599)~~
文摘[Objective] To screen out a microbial flocculant with good decolorization effect on methyl orange wastewater,and study the effect of different cultural conditions on decolorization effect of methyl orange.[Method] Absorbance of methyl orange solution before and after decolorization was determined by spectrophotometer,and the decolorization rate was calculated to compare the effects of different cultural conditions on removal rate of methyl orange.[Result]An optimal actinomycete stain（F-1-2） was screened out,and the best cultural condition was as follows：with sucrose as carbon source and NaNO3 as nitrogen source,cultured in constant temperature oscillator at 150 r/min,30℃ for 72 h.Under the optimal condition,the removal rate against methyl orange could reach 68.4%.[Conclusion]Different culture conditions have great impact on decolorization effect of strain.
文摘A crystalline sapphire （Al2O3） boule （Ф10 × 80mm^3） grown by the temperature gradient technique （TGT） is a bit colored due to carbon volatilization from the graphite heater at high temperatures and the absorption of transitional metal inclusions in the raw material. The sapphire becomes colorless and transparent after decolorization and decarbonization in successive annealings in air and hydrogen at high temperatures. The quality, optical transmissivity,and homogeneity of the sapphire are remarkably improved.
