The storage and separation of hydrocarbons is of great importance for the petrochemical industry.Herein,we report a fluorine-functionalized microporous indium(In)metal-organic framework(UPC-104)for light hydrocarbon s...The storage and separation of hydrocarbons is of great importance for the petrochemical industry.Herein,we report a fluorine-functionalized microporous indium(In)metal-organic framework(UPC-104)for light hydrocarbon storage and separation.UPC-104 can be stable up to 300℃,and can retain its framework in acidic and alkaline aqueous solutions(pH 1-11).Remarkably,the material exhibits very high H_(2)(230.8 cm^(3)g^(-1),2.06 wt%at 77 K and 1 bar),C_(2)H_(2)(187.0 cm^(3)g^(-1)at 273 K and 1 bar),and C_(3)H_(6)/C_(3)H_(8)adsorption capacity(276.5 cm^(3)g^(-1)and 250.4 cm^(3)g^(-1)for C_(3)H_(6)and C_(3)H_(8)at 273 K and 1 bar),and shows potential for the separation of light hydrocarbons(C_(2)H_(2),C_(2)H_(4),C_(2)H_(6),C_(3)H_(6),C_(3)H_(8),n-C_(4)H_(10),and i-C_(4)H_(10)relative to CH_(4)),as shown by single component gas sorption and selectivity calculations.展开更多
In this study,fucoidan(Fuc)extracted from kelp by water(WFu)and acid(AFu)was combined with zein to prepare nanoparticles.Its potential application as a curcumin(Cur)delivery system was also investigated.The results of...In this study,fucoidan(Fuc)extracted from kelp by water(WFu)and acid(AFu)was combined with zein to prepare nanoparticles.Its potential application as a curcumin(Cur)delivery system was also investigated.The results of chemical composition analysis showed that the sulfate content of AFu(26.44%)was significantly higher than that of WFu(19.65%).The molecular weight(Mw)and monosaccharide composition of WFu and AFu were also different.The anti-solvent precipitation method was used to prepare the nanoparticles.The analysis of nanoparticles with different mass ratios showed that the nanoparticles with a mass ratio of Fuc/zein of 1.5:1 had uniform particle distribution,good stability and the best encapsulation effect.Fourier transform infrared spectroscopy(FT-IR),differential scanning calorimetry(DSC),and fluorescence spectroscopy showed that hydrogen bonds and electrostatic interaction were the main forces responsible for the formation of the nanoparticles.Moreover,Fuc enhanced the thermal and storage stability of zein nanoparticles(ZNP).An in vitro digestion experiment using nanoparticles revealed that Fuc-ZNP had strong tolerance to the gastrointestinal tract and could be used for colon-specific Cur delivery.In addition,antioxidant experiments showed that Fuc significantly increased the antioxidant activity of ZNP(P<0.05).In conclusion,Fuc-ZNP have potential as a Cur delivery system.展开更多
In this study, the physicochemical compatibility and stability of four drug mixtures were evaluated, and the common drug mixtures used in the treatment of severe malaria in children were simulated by gravity perfusion...In this study, the physicochemical compatibility and stability of four drug mixtures were evaluated, and the common drug mixtures used in the treatment of severe malaria in children were simulated by gravity perfusion dynamic simulation experiment. The results showed that under experimental conditions, all drug mixtures exhibited clear transparency, stable density and refractive index, and pH values changed by no more than one unit, demonstrating compatibility and stability during the study period.展开更多
In order to resolve the conflict between mechanical sensitivity and explosive performance,we utilized a retro-synthesis approach to design and synthesize the ligand 1H-imidazole-4-carbohydrazide(4-IMCA)and the complex...In order to resolve the conflict between mechanical sensitivity and explosive performance,we utilized a retro-synthesis approach to design and synthesize the ligand 1H-imidazole-4-carbohydrazide(4-IMCA)and the complex Cu(4-IMCA)_(2)(ClO_(4))_(2)(ECC-1).The structure of the product was confirmed by singlecrystal X-ray diffraction,IR and elemental analysis.The results showed that the physicochemical stability of ECC-1 was improved,including thermal stability(Td=200°C),mechanical sensitivity(IS=3 J,FS=7 N),and explosive performance.Moreover,laser ignition(P=22 W,τ=3 ms,E=66 mJ)and lead plate damage tests showed that the detonation ability of ECC-1 was not compromised.展开更多
Water-soluble Monascus yellow pigments(WSMYP),derived from red pigments by sulfonation,have been widely used in the food industry;nevertheless,their color vibrancy must be further strengthened.The aim of this study wa...Water-soluble Monascus yellow pigments(WSMYP),derived from red pigments by sulfonation,have been widely used in the food industry;nevertheless,their color vibrancy must be further strengthened.The aim of this study was to synthesize novel WSMYP with improved color characteristics.Monascus red pigments(MRP)were first synthesized from Monascus orange pigments ammoniating with taurine,and other amino acids.Subsequently,novel WSMYP(T-MYP)were further obtained by sulfonation of MRP and thiourea dioxide.T-MYP bearing double sulfonic groups exhibited notably higher colorimetric values(L*,b*and C*)than commercial WSMYP with a single sulfonic group,indicating more desirable color characteristics as yellow pigments.Additionally,T-MYP demonstrated exceptional tonality in dyeing applications,remarkable stability under various environmental stressors,including thermal and ascorbic acid exposure,varying pH levels and good DPPH/ABTS radical scavenging activity.The findings of this work provide a promising avenue for the production of WSMYP with superior tonality,robust stability and great antioxidant activity.展开更多
Objectives:Tiger nut(Cyperus esculentus L.)oil is a promising edible oil that is rich in oleic acid.This study aimed to clarify the impact of different degumming methods on the chemical composition and physicochemical...Objectives:Tiger nut(Cyperus esculentus L.)oil is a promising edible oil that is rich in oleic acid.This study aimed to clarify the impact of different degumming methods on the chemical composition and physicochemical properties of crude tiger nut oil(CTO).Materials and Methods:Five degummed tiger nut oils were prepared by high-temperature water(HWDO),medium-temperature water(MWDO),sodium chloride solution(SDO),acidic solution(ADO),and enzymatic method(EDO),respectively.Results:Compared to that of CTO,the phospholipid contents of HWDO,MWDO,SDO,ADO,and EDO were reduced by 99.39%,97.18%,69.95%,63.77%,and 65.60%,respectively.For CTO and all degummed oils,the fatty acid and endogenous antioxidant(i.e.tocopherols,sterols,flavonoids,total phenolics,and carotenoids)contents showed only small differences,but showed significant differences in quality parameters.Both the oxidative stability index and ferric ion-reducing antioxidant power decreased significantly after degumming;the former decreased from 52.26 to 15.55-19.80 h,and the latter decreased from 5818.91 to 4348.73-4524.34μmol Trolox(TE)/kg.Conclusions:These changes are highly related to the removal of hydratable phospholipids.In short,EDO exhibited the lowest turbidity,whereas MWDO showed the best oxidative stability(19.80 h)and highest smoke point(230.0℃).This information can be utilized to improve the industrial production of tigernutoil.展开更多
This study investigates almond oil parameters such as yield,fatty acids,peroxide value,and antioxidant activity over a 12-month storage period.Despite stable oil yields due to almond shells’protective properties,ther...This study investigates almond oil parameters such as yield,fatty acids,peroxide value,and antioxidant activity over a 12-month storage period.Despite stable oil yields due to almond shells’protective properties,there are increases in free fatty acids and peroxide values,indicating oxidation.Iodine values mostly align with norms,but some exceed limits.Chlorophyll decreases while carotenoids increase during storage,possibly due to chlorophyll degradation.Oleic acid remains predominant in fatty acid composition,distinguishing sweet and bitter almonds.Alpha-tocopherol prevails,with storage affecting gamma and beta tocopherol.Polyphenol content decreases over time,differing between almond types.DPPH and ABTS tests reflect antioxidant activity changes similarly.Bitter almonds yield higher extraction yields and phenolic compounds.Principal Component Analysis(PCA)elucidates variable relationships.Almond oil samples are classified into three groups based on quality and antioxidant properties.CHAID analysis emphasizes DPPH’s importance in distinguishing samples and its correlation with Total Phenolic Compounds(TPC),enhancing comprehension of almond oil’s chemical composition and antioxidant properties.展开更多
基金support from the National Natural Science Foundation of China(NSFC,Grant No.21571187)the Taishan Scholar Foundation(ts201511019)the Fundamental Research Funds for the Central Universities(18CX06003A).
文摘The storage and separation of hydrocarbons is of great importance for the petrochemical industry.Herein,we report a fluorine-functionalized microporous indium(In)metal-organic framework(UPC-104)for light hydrocarbon storage and separation.UPC-104 can be stable up to 300℃,and can retain its framework in acidic and alkaline aqueous solutions(pH 1-11).Remarkably,the material exhibits very high H_(2)(230.8 cm^(3)g^(-1),2.06 wt%at 77 K and 1 bar),C_(2)H_(2)(187.0 cm^(3)g^(-1)at 273 K and 1 bar),and C_(3)H_(6)/C_(3)H_(8)adsorption capacity(276.5 cm^(3)g^(-1)and 250.4 cm^(3)g^(-1)for C_(3)H_(6)and C_(3)H_(8)at 273 K and 1 bar),and shows potential for the separation of light hydrocarbons(C_(2)H_(2),C_(2)H_(4),C_(2)H_(6),C_(3)H_(6),C_(3)H_(8),n-C_(4)H_(10),and i-C_(4)H_(10)relative to CH_(4)),as shown by single component gas sorption and selectivity calculations.
基金supported by the National Natural Science Foundation of China(No.31701611)the Education Department of Jilin Province of China(No.JJKH20200579KJ)the Young Scholars Climbing Project of Changchun University(No.ZKP202032).
文摘In this study,fucoidan(Fuc)extracted from kelp by water(WFu)and acid(AFu)was combined with zein to prepare nanoparticles.Its potential application as a curcumin(Cur)delivery system was also investigated.The results of chemical composition analysis showed that the sulfate content of AFu(26.44%)was significantly higher than that of WFu(19.65%).The molecular weight(Mw)and monosaccharide composition of WFu and AFu were also different.The anti-solvent precipitation method was used to prepare the nanoparticles.The analysis of nanoparticles with different mass ratios showed that the nanoparticles with a mass ratio of Fuc/zein of 1.5:1 had uniform particle distribution,good stability and the best encapsulation effect.Fourier transform infrared spectroscopy(FT-IR),differential scanning calorimetry(DSC),and fluorescence spectroscopy showed that hydrogen bonds and electrostatic interaction were the main forces responsible for the formation of the nanoparticles.Moreover,Fuc enhanced the thermal and storage stability of zein nanoparticles(ZNP).An in vitro digestion experiment using nanoparticles revealed that Fuc-ZNP had strong tolerance to the gastrointestinal tract and could be used for colon-specific Cur delivery.In addition,antioxidant experiments showed that Fuc significantly increased the antioxidant activity of ZNP(P<0.05).In conclusion,Fuc-ZNP have potential as a Cur delivery system.
文摘In this study, the physicochemical compatibility and stability of four drug mixtures were evaluated, and the common drug mixtures used in the treatment of severe malaria in children were simulated by gravity perfusion dynamic simulation experiment. The results showed that under experimental conditions, all drug mixtures exhibited clear transparency, stable density and refractive index, and pH values changed by no more than one unit, demonstrating compatibility and stability during the study period.
基金the generous financial support from the projects of NSFC(22175025).
文摘In order to resolve the conflict between mechanical sensitivity and explosive performance,we utilized a retro-synthesis approach to design and synthesize the ligand 1H-imidazole-4-carbohydrazide(4-IMCA)and the complex Cu(4-IMCA)_(2)(ClO_(4))_(2)(ECC-1).The structure of the product was confirmed by singlecrystal X-ray diffraction,IR and elemental analysis.The results showed that the physicochemical stability of ECC-1 was improved,including thermal stability(Td=200°C),mechanical sensitivity(IS=3 J,FS=7 N),and explosive performance.Moreover,laser ignition(P=22 W,τ=3 ms,E=66 mJ)and lead plate damage tests showed that the detonation ability of ECC-1 was not compromised.
基金financially supported by the National Natural Science Foundation of China(31901673)Guangdong Key R&D Program,Department of Science and Technology of Guangdong Province(2019B040402002,2019B020210002).
文摘Water-soluble Monascus yellow pigments(WSMYP),derived from red pigments by sulfonation,have been widely used in the food industry;nevertheless,their color vibrancy must be further strengthened.The aim of this study was to synthesize novel WSMYP with improved color characteristics.Monascus red pigments(MRP)were first synthesized from Monascus orange pigments ammoniating with taurine,and other amino acids.Subsequently,novel WSMYP(T-MYP)were further obtained by sulfonation of MRP and thiourea dioxide.T-MYP bearing double sulfonic groups exhibited notably higher colorimetric values(L*,b*and C*)than commercial WSMYP with a single sulfonic group,indicating more desirable color characteristics as yellow pigments.Additionally,T-MYP demonstrated exceptional tonality in dyeing applications,remarkable stability under various environmental stressors,including thermal and ascorbic acid exposure,varying pH levels and good DPPH/ABTS radical scavenging activity.The findings of this work provide a promising avenue for the production of WSMYP with superior tonality,robust stability and great antioxidant activity.
基金supported by the National Key Research and Development Plan of China(No.2019YFD1002605)the National Key Research and Development Plan for Science and Technology Innovation of China(No.SQ2019YFD100114)the‘Double First-Class’Project for Postgraduate Academic Innovation Enhancement Programme of Henan University of Technology(No.HAUTSYL2023TS08),China.
文摘Objectives:Tiger nut(Cyperus esculentus L.)oil is a promising edible oil that is rich in oleic acid.This study aimed to clarify the impact of different degumming methods on the chemical composition and physicochemical properties of crude tiger nut oil(CTO).Materials and Methods:Five degummed tiger nut oils were prepared by high-temperature water(HWDO),medium-temperature water(MWDO),sodium chloride solution(SDO),acidic solution(ADO),and enzymatic method(EDO),respectively.Results:Compared to that of CTO,the phospholipid contents of HWDO,MWDO,SDO,ADO,and EDO were reduced by 99.39%,97.18%,69.95%,63.77%,and 65.60%,respectively.For CTO and all degummed oils,the fatty acid and endogenous antioxidant(i.e.tocopherols,sterols,flavonoids,total phenolics,and carotenoids)contents showed only small differences,but showed significant differences in quality parameters.Both the oxidative stability index and ferric ion-reducing antioxidant power decreased significantly after degumming;the former decreased from 52.26 to 15.55-19.80 h,and the latter decreased from 5818.91 to 4348.73-4524.34μmol Trolox(TE)/kg.Conclusions:These changes are highly related to the removal of hydratable phospholipids.In short,EDO exhibited the lowest turbidity,whereas MWDO showed the best oxidative stability(19.80 h)and highest smoke point(230.0℃).This information can be utilized to improve the industrial production of tigernutoil.
基金Researchers Supporting Project Number(RSPD2024R706)at King Saud University Riyadh Saudi Arabia for financial support。
文摘This study investigates almond oil parameters such as yield,fatty acids,peroxide value,and antioxidant activity over a 12-month storage period.Despite stable oil yields due to almond shells’protective properties,there are increases in free fatty acids and peroxide values,indicating oxidation.Iodine values mostly align with norms,but some exceed limits.Chlorophyll decreases while carotenoids increase during storage,possibly due to chlorophyll degradation.Oleic acid remains predominant in fatty acid composition,distinguishing sweet and bitter almonds.Alpha-tocopherol prevails,with storage affecting gamma and beta tocopherol.Polyphenol content decreases over time,differing between almond types.DPPH and ABTS tests reflect antioxidant activity changes similarly.Bitter almonds yield higher extraction yields and phenolic compounds.Principal Component Analysis(PCA)elucidates variable relationships.Almond oil samples are classified into three groups based on quality and antioxidant properties.CHAID analysis emphasizes DPPH’s importance in distinguishing samples and its correlation with Total Phenolic Compounds(TPC),enhancing comprehension of almond oil’s chemical composition and antioxidant properties.
