Essential oils are a volatile and aromatic substance with a variety of active biological activities.However,the excessive volatility and inconvenience of the use of essential oils limit their applications.In this stud...Essential oils are a volatile and aromatic substance with a variety of active biological activities.However,the excessive volatility and inconvenience of the use of essential oils limit their applications.In this study,we developed a reactive mesoporous silica nanoparticle(rMSNs)based on cyanuric chloride modification for essential oil encapsulation and commodity adhesion.The large pore volume and specific surface area of rMSNs facilitate the nanoparticles adhering to a large amount of essential oil and achieve the sustained release of essential oil,thus prolonging the fragrance retention time of essential oils.The reactive nanoessential oils can form covalent bonds with the wallpaper,thereby remarkably improving the adhesion of the reactive nano-essential oils on the wallpaper and preventing the reactive nano-essential oil from deadhering from the wallpaper.The active nano essential oil simultaneously overcomes the intense volatility of the essential oil and inconvenience in use,has a simple preparation process and low cost,and has great application potential.展开更多
Fragrances are frequently added to a variety of products,including food,cosmetics and health products.However,the high volatility and instability of essence limit its application in some fields.In this study,mesoporou...Fragrances are frequently added to a variety of products,including food,cosmetics and health products.However,the high volatility and instability of essence limit its application in some fields.In this study,mesoporous silica nanoparticles(MSNs) were prepared to encapsulate eugenol,which could reduce the volatilization of the fragrance molecules.A facile approach was presented to synthesize MSNs with three different pore diameters for encapsulating eugenol.In addition,the properties of MSNs including mean particle size,morphology,encapsulating efficiency and release tendency were charac terized.Results showed that the larger the pore diameters of MSNs,the more aromatic molecules were adsorbed.Furthermore,the release mechanism was described as the smaller the pore diameters of MSNs,the slower the release of eugenol.展开更多
Fragrances are widely used in cosmetics,apparel and detergents.However,the rapid evaporation of the aro ma shortens the useful life of the aromatic product.Therefore,improving the fragrance retention time of aromatic ...Fragrances are widely used in cosmetics,apparel and detergents.However,the rapid evaporation of the aro ma shortens the useful life of the aromatic product.Therefore,improving the fragrance retention time of aromatic products and prolonging the service life of aromatic products are the key scientific problems that need to be solved in current aromatic products.In this study,zwitterionic comb-like lipid polymers were synthesized to encapsulate the fragrance molecule linalool.The results showed that the zwitterionic comb lipid molecules were capable of encapsulating more linalool than linear lipid molecules.At the same time,the zwitterionic comb-like lipid molecules also limited the slow release rate of the aroma,thereby increasing the fragrance retention time of the nano-fragrance.展开更多
Fragrances are widely used in our daily life and have made great contributions to creating a clean and fresh healthy air environment. However, the rapid volatilization severely influences their storage,application and...Fragrances are widely used in our daily life and have made great contributions to creating a clean and fresh healthy air environment. However, the rapid volatilization severely influences their storage,application and quality. Therefore, it is necessary and urgent to develop approaches to controllably release the odorants as demanded. In this study, photo-driven mesoporous silica nanospheres loaded with sandela 803 was designed, prepared and named as S803@MS-S. S803@MS-S possessed ordered mesoporous, large specific surface area and pore volume. After adsorption of sandela 803, the S803@MSS was added into wallpaper to prepare fragrant wallpaper S803@MS-S-W. And this wallpaper exhibited excellent sustained and controlled release performances stimulated by light.展开更多
Silk has been widely used in the clothing industry due to their soft and smooth features,good biocompatibility,good heat dissipation,warmth and ultraviolet resistance.The application of fragrance to silk can significa...Silk has been widely used in the clothing industry due to their soft and smooth features,good biocompatibility,good heat dissipation,warmth and ultraviolet resistance.The application of fragrance to silk can significantly improve the performance of silk.However,there are two key scientific problems that need to be solved:slowing down the release rate of fragrances and increasing the scent lasting time of silk.In this study,cationic and temperature-sensitive liposomes were designed and prepared to encapsulate eugenol.These fragrance-loaded liposomes significantly slowed down the release rate of the fragrance and controlled the release rate of the fragrance in a thermo-sensitive manner.The liposomes adhered to the silk through electrostatic adsorption interaction.The positive charge on the fragranceloaded liposomes neutralized much negative charge on silk and thereby increasing the adhesion efficiency.展开更多
Fragrances are widely used in many aspects of our lives.They cannot only make people happy,but also treat many diseases.However,excessively fast evaporation rate is one of the main obstacles to the use of spices.In th...Fragrances are widely used in many aspects of our lives.They cannot only make people happy,but also treat many diseases.However,excessively fast evaporation rate is one of the main obstacles to the use of spices.In this study,mesoporous silica nanorods(MSNRs)and hollow mesoporous silica nanorods(HMSNRs)were prepared to encapsulate eugenol.These two nano-fragrances were named eugenol@MSNRs and eugenol@HMSNRs,respectively.The morphologies,size,interior structures and pore performances of MSNRs and HMSNRs.Besides,the performances of encapsulation and fragrance release of eugenol@MSNRs and eugenol@HMSNRs were compared and analyzed.The results showed that eugenol@HMSNRs encapsulated more fragrance and were faster to encapsulate compared with eugenol@MSNRs.Both the release rates of eugenol from eugenol@MSNRs and eugenol@HMSNRs were slow.But the eugenol was released from eugenol@MSNRs more slowly.展开更多
Several important drugs and nutritional supplements are limited by their lack of bioavailability.Nanomaterials display unique beneficial properties that might help improve the bioavailability of drugs and nutritional ...Several important drugs and nutritional supplements are limited by their lack of bioavailability.Nanomaterials display unique beneficial properties that might help improve the bioavailability of drugs and nutritional supplements.Unfortunately,nanomaterials produced from synthetic polymers and metals may have similar difficulties with bioavailability and toxicity.Naturally occurring biopolymers are biodegradable and non-toxic and are adaptable to the synthesis of nanoparticles.Drugs and other substances can be encapsulated or embedded in such particles with an increase in bioavailability.The search for biodegradable nanomaterials is an active research field.This review summarizes the research on nanocrystalline cellulose,starch,lignin,and other biological and environment-friendly nanocomposites which are commonly used as nanocarriers for drugs and nutrients.Further,prospects for the use of biodegradable nanomaterials in targeted therapy,including environmentally responsive therapy,are discussed.展开更多
The interactions of key lactone chiral compounds(γ-octalactone andγ-undecalactone)in Longjing tea with olfactory receptors(taking OR1A1 as an example)were elucidated through molecular docking and molecular dynamics....The interactions of key lactone chiral compounds(γ-octalactone andγ-undecalactone)in Longjing tea with olfactory receptors(taking OR1A1 as an example)were elucidated through molecular docking and molecular dynamics.The results showed that the thresholds forγ-octalactone,(R)-(+)-γ-octalactone,and(S)-(-)-γ-octalactone were 82μg/L,300μg/L,and 125μg/L,respectively.The thresholds forγ-undecalactone,(R)-(+)-γ-undecalactone and(S)-(-)-γ-undecalactone are 6μg/L,4μg/L,and 10μg/L,respectively.The binding of(S)-(-)-γ-octalactone(-18.389 kJ/mol)to the olfactory receptor OR1A1 is more stable than that of the(R)-(+)-γ-octalactone(-17.280 kJ/mol).On the contrary,(R)-(+)-γ-undecalactone(-19.146 kJ/mol)is binding stability than(S)-(-)-γ-undecalactone(-19.115 kJ/mol).Molecular dynamics simulations imply that the binding of(S)-(-)-γ-octalactone and(R)-(+)-γ-undecalactone to OR1A1 are primarily through polar and hydrogen bonding interactions,whereas(R)-(+)-γ-octalactone and(S)-(-)-γ-undecalactone are relies on hydrophobic interactions.These findings provide scientific support for improving the quality of Longjing tea.展开更多
This study elucidates the modes of interaction and molecular mechanisms between three acidic substances(citric acid,malic acid,lactic acid)and sweet compounds(sucrose,glucose)through a multi-scale approach integrating...This study elucidates the modes of interaction and molecular mechanisms between three acidic substances(citric acid,malic acid,lactic acid)and sweet compounds(sucrose,glucose)through a multi-scale approach integrating sensory evaluation,electronic tongue analysis,and molecular simulations(docking and dynamics).The results revealed a concentration-dependent effect of acids on sweetness perception:at low concentrations(0.005-0.015%),a slight enhancement of sweetness was observed sensorially,while at higher concentrations(up to 0.025%),all three acids significantly could reduce perceived sweetness.The strength of suppression followed the order:citric acid>malic acid>lactic acid.Electronic tongue measurements demonstrated high consistency with sensory data,quantitatively confirming the antagonistic effect of acids on sweet taste perception by showing a significant decrease in sweetness response with increasing acid concentrations.Molecular docking and dynamics simulations indicated that acidic molecules competitively bind to the Venus flytrap domain(VFD)of the T1R2/T1R3 sweet receptor,disrupting sugar-receptor interactions.Citric acid,with three carboxyl groups,showed the strongest competitive binding,while lactic acid had the mildest effect due to its smaller size and reduced po-larity.This work provides a theoretical basis for the precise regulation of sweet-acid balance in beverage for-mulations,supporting the development of reduced-sugar products.展开更多
Sweet orange has become increasingly popular worldwide due to its unique flavor and nutritional value.In this study,four characteristic aroma compounds of sweet orange(α-pinene,octanal,ethyl butyrate,linalool)were se...Sweet orange has become increasingly popular worldwide due to its unique flavor and nutritional value.In this study,four characteristic aroma compounds of sweet orange(α-pinene,octanal,ethyl butyrate,linalool)were selected,and their interactions were evaluated at the macroscopic level through sensory experiments with pairwise combinations.Subsequently,the S-curve method combined with molecular simulation technology was used to systematically analyze the differences in synergistic effects between three broad-spectrum olfactory receptors(OR1A1,OR2W1,OR52D1)and the four characteristic aroma compounds of sweet orange.Sensory experiments showed that at least one masking effect existed in the pairwise combinations,and differences in aroma types led to different olfactory adaptation rates,with the synergistic effect betweenα-pinene and ethyl butyrate being particularly significant.Molecular docking revealed that hydrogen bonds in the active center of OR2W1(SER109/ASN155)and the multiple hydrogen bond network of OR1A1(THR239/SER/ARG122)were key binding modes,while OR52D1 had the weakest binding ability due to fewer and shorter hydrogen bonds.The rigid structure ofα-pinene caused steric hindrance,affecting the synergistic effect.Molecular dynamics further revealed that the high RMSD value of OR52D1 reflected its conformational flexibility,while OR2W1 enhanced binding stability through a“hydrophobic network”.This study confirms that olfactory perception is the result of hydrogen bonds,hydrophobic interactions,and dynamic equilibrium of molecular conformations,providing a theoretical basis for the synergistic mechanism of complex aroma systems.展开更多
Astronauts are under high stress for a long time because of the microgravity condition,which leads to anxiety,affects their learning and memory abilities,and seriously impairs the health of astronauts.Aromatherapy can...Astronauts are under high stress for a long time because of the microgravity condition,which leads to anxiety,affects their learning and memory abilities,and seriously impairs the health of astronauts.Aromatherapy can improve the physical and mental health of astronauts in a way that moisturizes them softly and silently.However,the strong volatility of fragrances and inconvenience of aroma treatment greatly limit their application in the field of spaceflight.In this study,reactive mesoporous silica nanoparticles were prepared to encapsulate and slowly release limonene.The limonene loaded nanoparticles were named limonene@mesoporous silica nanoparticles-cyanuric chloride(LE@MSNs-CYC).LE@MSNs-CYC were then applied to wallpaper to improve the convenience of aromatherapy.LE@MSNs-CYC could chemically react with the wallpaper,thus firmly adsorbed on the wallpaper.In the following,the mice were treated with hindlimb unloading(HU)to simulate a microgravity environment.The results showed that 28-day HU led to an increase in the level of anxiety and declines in learning,memory,and physical health in mice.LE@MSNs-CYC showed significant relief effects on anxiety,learning,memory,and physical health of HU treated mice.Subsequently,the molecular mechanisms were explored by hypothalamic-pituitary-adrenal axis related hormones,immune-related cytokines,learning,and memory-related neurotransmitters and proteins.展开更多
The aroma of tea is one of the main sensory characteristics reflecting the quality of tea.The interactions between tea compounds were analyzed based on a S-curve method and molecular docking technology.This research e...The aroma of tea is one of the main sensory characteristics reflecting the quality of tea.The interactions between tea compounds were analyzed based on a S-curve method and molecular docking technology.This research examined the tea aroma intensity value before and after combination,the molecular docking energy through the predicted strength relationship,and the change of molecular docking energy and binding site to study compound interactions in the tea.The experiment showed that,according to the results of the determination of the sensory threshold value,the establishment of S-curve and the simulation calculation of molecular docking,the results of molecular docking and S-curve of the 10 characteristic compounds in tea selected in the present work reached the same conclusion.The results showed that studying the interaction of tea compounds based on molecular docking technology was simple,intuitive and reliable,which provided a theoretical basis and technical guidance for the study of the coordination action between compounds.展开更多
Disposable hygiene products have evolved into the important parts for millions of people around the world,enhancing the convenience of daily lives.However,development of the disposable hygiene products is restricted b...Disposable hygiene products have evolved into the important parts for millions of people around the world,enhancing the convenience of daily lives.However,development of the disposable hygiene products is restricted by unsustainable production technology,complicated operation process,and poor liquid absorption performance of the absorbent core.Herein,integrated and three-dimensional(3D)multifunctional superabsorbent nonwovens with liquid-triggered fragrance release was prepared via green,fast and scalable multi efect hot-air anchoring method which physically crosslinking the joint thermobonding fbers and anchoring fragrance microcapsules/super absorbent polymer(SAP)onto adjacent thermo-bonding fbers simultaneously.The resulting composite nonwovens could three-dimensionally absorb water 33.14 times of its own weight without gel blockage between SAP,and correspondingly release increased intensity fragrance along with enhancing amount of water absorption.Absorption rate t1 and t2 is 83.62%and 50.62%higher than the commercial specimen respectively,and the air permeability is increased by 226.88%compared with the commercial specimen.The superabsorbent nonwovens with controllable fragrance release and odorant synergistic has the potential to be practically applied to functional textiles felds because of the excellent liquid absorption and controlled fragrance release performance,and is easy to be produced on a sustainable,pollution-free and large-scale industrial production.展开更多
Maillard reaction intermediates(MRIs)derived from peanut protein hydrolysates(PPH)and xylose(Xyl)were prepared using the water bath combined with spray drying and vacuum drying.The monitoring of free amino content,bro...Maillard reaction intermediates(MRIs)derived from peanut protein hydrolysates(PPH)and xylose(Xyl)were prepared using the water bath combined with spray drying and vacuum drying.The monitoring of free amino content,browning precursors,and taste characteristics was carried out throughout the thermal treatment at low temperature,where the Maillard reaction process was slowed down,and the formation and degradation of MRIs were dynamically balanced at low conversion rates.The reaction between amino compounds and the reducing sugars contributed to the increased taste characteristics during the early phase of Maillard reaction.Fluorescence intensity was reduced after reaching its maximum value and browning intensity was significantly increased during vacuum drying,which confirmed that the Maillard reaction entered into an advanced stage.Vacuum drying also led to a significant increase in the total amount of volatile compounds in the subsequent thermal processing reaction(from 212.93 ng/g to 564.91 ng/g),which demonstrated that the higher fluorescence intensities resulted in the more accumulation of MRIs and better capabilities of flavor formation.展开更多
Gradient dilution feeding substrate(GDFS)is regarded as an effective method for the production of active peptides,as it compensates for substrate limitations and minimizes substrate contamination of the ultrafiltratio...Gradient dilution feeding substrate(GDFS)is regarded as an effective method for the production of active peptides,as it compensates for substrate limitations and minimizes substrate contamination of the ultrafiltration membrane.This study further investigated the impact of ultrasound-assisted gradient dilution feeding substrate(UA-GDFS)on the peptide yield and the intensity of umami.The chicken breast was used as ingredients.The umami compounds in the hydrolysate were determined using an automatic amino acid analyzer and HPLC.The hydrolysate’s umami intensity was determined by electronic tongue in all modes.These findings indicated that UA-GDFS enhanced the umami intensity and peptide yield.Hydrolysate from UA-GDFS with molecular weight below 1 kDa was analyzed by nano-scale liquid chromatography-tandem mass spectrometry(Nano-HPLC-MS/MS).Electronic tongue analysis showed that GPSGPVG and VDGPSGK had umami taste and could enhance the umami taste of monosodium glutamate(MSG)solution.Asn68 and His145 were important sites on T1R3 for umami peptide binding.展开更多
基金financially supported by the National High Technology Research and Development Program(No.2016YFA0200303)the Beijing Natural Science Foundation(No.2192057)the National Natural Science Foundation of China(Nos.31771095,21875254 and 21905283)。
摘要Essential oils are a volatile and aromatic substance with a variety of active biological activities.However,the excessive volatility and inconvenience of the use of essential oils limit their applications.In this study,we developed a reactive mesoporous silica nanoparticle(rMSNs)based on cyanuric chloride modification for essential oil encapsulation and commodity adhesion.The large pore volume and specific surface area of rMSNs facilitate the nanoparticles adhering to a large amount of essential oil and achieve the sustained release of essential oil,thus prolonging the fragrance retention time of essential oils.The reactive nanoessential oils can form covalent bonds with the wallpaper,thereby remarkably improving the adhesion of the reactive nano-essential oils on the wallpaper and preventing the reactive nano-essential oil from deadhering from the wallpaper.The active nano essential oil simultaneously overcomes the intense volatility of the essential oil and inconvenience in use,has a simple preparation process and low cost,and has great application potential.
基金This work was financially supported by the National High Technology Research and Development Program(No.2016YFA0200303)the Beijing Natural Science Foundation(Nos.L172046,2192057)the National Natural Science Foundation of China(Nos.31771095,21875254 and 21905283).
摘要Fragrances are frequently added to a variety of products,including food,cosmetics and health products.However,the high volatility and instability of essence limit its application in some fields.In this study,mesoporous silica nanoparticles(MSNs) were prepared to encapsulate eugenol,which could reduce the volatilization of the fragrance molecules.A facile approach was presented to synthesize MSNs with three different pore diameters for encapsulating eugenol.In addition,the properties of MSNs including mean particle size,morphology,encapsulating efficiency and release tendency were charac terized.Results showed that the larger the pore diameters of MSNs,the more aromatic molecules were adsorbed.Furthermore,the release mechanism was described as the smaller the pore diameters of MSNs,the slower the release of eugenol.
基金financially supported by the National High Technology Research and Development Program(No.2016YFA0200303)the Beijing Natural Science Foundation(Nos.L172046,2192057)the National Natural Science Foundation of China(Nos.31771095,21875254 and 51573188)。
摘要Fragrances are widely used in cosmetics,apparel and detergents.However,the rapid evaporation of the aro ma shortens the useful life of the aromatic product.Therefore,improving the fragrance retention time of aromatic products and prolonging the service life of aromatic products are the key scientific problems that need to be solved in current aromatic products.In this study,zwitterionic comb-like lipid polymers were synthesized to encapsulate the fragrance molecule linalool.The results showed that the zwitterionic comb lipid molecules were capable of encapsulating more linalool than linear lipid molecules.At the same time,the zwitterionic comb-like lipid molecules also limited the slow release rate of the aroma,thereby increasing the fragrance retention time of the nano-fragrance.
基金financially supported by the National High Technology Research and Development Program (No. 2016YFA0200303)the Beijing Natural Science Foundation (No. L172046)+2 种基金the National Natural Science Foundation of China(Nos. 31522023, 51373177 and 51573188)the Beijing Municipal Science & Technology Commission (No. Z161100002616015)the "Strategic Priority Research Program Research Program" of the Chinese Academy of Sciences(No. XDA09030301-3)
摘要Fragrances are widely used in our daily life and have made great contributions to creating a clean and fresh healthy air environment. However, the rapid volatilization severely influences their storage,application and quality. Therefore, it is necessary and urgent to develop approaches to controllably release the odorants as demanded. In this study, photo-driven mesoporous silica nanospheres loaded with sandela 803 was designed, prepared and named as S803@MS-S. S803@MS-S possessed ordered mesoporous, large specific surface area and pore volume. After adsorption of sandela 803, the S803@MSS was added into wallpaper to prepare fragrant wallpaper S803@MS-S-W. And this wallpaper exhibited excellent sustained and controlled release performances stimulated by light.
基金the National High Technology Research and Development Program(No.2016YFA0200303)the Beijing Natural Science Foundation(Nos.L172046,2192057)the National Natural Science Foundation of China(Nos.31771095,21875254 and 51573188)。
摘要Silk has been widely used in the clothing industry due to their soft and smooth features,good biocompatibility,good heat dissipation,warmth and ultraviolet resistance.The application of fragrance to silk can significantly improve the performance of silk.However,there are two key scientific problems that need to be solved:slowing down the release rate of fragrances and increasing the scent lasting time of silk.In this study,cationic and temperature-sensitive liposomes were designed and prepared to encapsulate eugenol.These fragrance-loaded liposomes significantly slowed down the release rate of the fragrance and controlled the release rate of the fragrance in a thermo-sensitive manner.The liposomes adhered to the silk through electrostatic adsorption interaction.The positive charge on the fragranceloaded liposomes neutralized much negative charge on silk and thereby increasing the adhesion efficiency.
基金the National High Technology Research and Development Program(No.2016YFA0200303)the Beijing Natural Science Foundation(Nos.L172046,2192057)the National Natural Science Foundation of China(Nos.31771095,21875254 and 21905283)。
摘要Fragrances are widely used in many aspects of our lives.They cannot only make people happy,but also treat many diseases.However,excessively fast evaporation rate is one of the main obstacles to the use of spices.In this study,mesoporous silica nanorods(MSNRs)and hollow mesoporous silica nanorods(HMSNRs)were prepared to encapsulate eugenol.These two nano-fragrances were named eugenol@MSNRs and eugenol@HMSNRs,respectively.The morphologies,size,interior structures and pore performances of MSNRs and HMSNRs.Besides,the performances of encapsulation and fragrance release of eugenol@MSNRs and eugenol@HMSNRs were compared and analyzed.The results showed that eugenol@HMSNRs encapsulated more fragrance and were faster to encapsulate compared with eugenol@MSNRs.Both the release rates of eugenol from eugenol@MSNRs and eugenol@HMSNRs were slow.But the eugenol was released from eugenol@MSNRs more slowly.
基金National Natural Science Foundation of China(31901618)China Postdoctoral Science Foundation(2020M681125)Open Project Fund from Shanghai Collaborative Innovation Center for Aroma,Perfume and Cosmetics Research,and the Estabalishment of the Tabocco Product and Technology Integrated Innovation System for the Southeastern Asia Tobacco Market(2018IA057).
摘要Several important drugs and nutritional supplements are limited by their lack of bioavailability.Nanomaterials display unique beneficial properties that might help improve the bioavailability of drugs and nutritional supplements.Unfortunately,nanomaterials produced from synthetic polymers and metals may have similar difficulties with bioavailability and toxicity.Naturally occurring biopolymers are biodegradable and non-toxic and are adaptable to the synthesis of nanoparticles.Drugs and other substances can be encapsulated or embedded in such particles with an increase in bioavailability.The search for biodegradable nanomaterials is an active research field.This review summarizes the research on nanocrystalline cellulose,starch,lignin,and other biological and environment-friendly nanocomposites which are commonly used as nanocarriers for drugs and nutrients.Further,prospects for the use of biodegradable nanomaterials in targeted therapy,including environmentally responsive therapy,are discussed.
基金sponsored by the National Natural Science Foundation of China(Grants 32272453)the Science and Technology Project of Guizhou Provincial Company of China Tobacco Corporation(2023XM19)+1 种基金Collaborative Innovation Fund of Shanghai Institute of Technology(XTCX2023-15)Guiyang Technology Innovation Center of Ecological Food(Flavor and Quality)Industry.
摘要The interactions of key lactone chiral compounds(γ-octalactone andγ-undecalactone)in Longjing tea with olfactory receptors(taking OR1A1 as an example)were elucidated through molecular docking and molecular dynamics.The results showed that the thresholds forγ-octalactone,(R)-(+)-γ-octalactone,and(S)-(-)-γ-octalactone were 82μg/L,300μg/L,and 125μg/L,respectively.The thresholds forγ-undecalactone,(R)-(+)-γ-undecalactone and(S)-(-)-γ-undecalactone are 6μg/L,4μg/L,and 10μg/L,respectively.The binding of(S)-(-)-γ-octalactone(-18.389 kJ/mol)to the olfactory receptor OR1A1 is more stable than that of the(R)-(+)-γ-octalactone(-17.280 kJ/mol).On the contrary,(R)-(+)-γ-undecalactone(-19.146 kJ/mol)is binding stability than(S)-(-)-γ-undecalactone(-19.115 kJ/mol).Molecular dynamics simulations imply that the binding of(S)-(-)-γ-octalactone and(R)-(+)-γ-undecalactone to OR1A1 are primarily through polar and hydrogen bonding interactions,whereas(R)-(+)-γ-octalactone and(S)-(-)-γ-undecalactone are relies on hydrophobic interactions.These findings provide scientific support for improving the quality of Longjing tea.
基金funded by the Key Projects of the National Natural Science Foundation of China(32330080)Collaborative Innovation Fund of Shanghai Institute of Technology(XTCX2023-15).
摘要This study elucidates the modes of interaction and molecular mechanisms between three acidic substances(citric acid,malic acid,lactic acid)and sweet compounds(sucrose,glucose)through a multi-scale approach integrating sensory evaluation,electronic tongue analysis,and molecular simulations(docking and dynamics).The results revealed a concentration-dependent effect of acids on sweetness perception:at low concentrations(0.005-0.015%),a slight enhancement of sweetness was observed sensorially,while at higher concentrations(up to 0.025%),all three acids significantly could reduce perceived sweetness.The strength of suppression followed the order:citric acid>malic acid>lactic acid.Electronic tongue measurements demonstrated high consistency with sensory data,quantitatively confirming the antagonistic effect of acids on sweet taste perception by showing a significant decrease in sweetness response with increasing acid concentrations.Molecular docking and dynamics simulations indicated that acidic molecules competitively bind to the Venus flytrap domain(VFD)of the T1R2/T1R3 sweet receptor,disrupting sugar-receptor interactions.Citric acid,with three carboxyl groups,showed the strongest competitive binding,while lactic acid had the mildest effect due to its smaller size and reduced po-larity.This work provides a theoretical basis for the precise regulation of sweet-acid balance in beverage for-mulations,supporting the development of reduced-sugar products.
基金funded by the Key Projects of the National Natural Science Foundation of China(32330080)Collaborative Innovation Fund of Shanghai Institute of Technology(XTCX 2023-15).
摘要Sweet orange has become increasingly popular worldwide due to its unique flavor and nutritional value.In this study,four characteristic aroma compounds of sweet orange(α-pinene,octanal,ethyl butyrate,linalool)were selected,and their interactions were evaluated at the macroscopic level through sensory experiments with pairwise combinations.Subsequently,the S-curve method combined with molecular simulation technology was used to systematically analyze the differences in synergistic effects between three broad-spectrum olfactory receptors(OR1A1,OR2W1,OR52D1)and the four characteristic aroma compounds of sweet orange.Sensory experiments showed that at least one masking effect existed in the pairwise combinations,and differences in aroma types led to different olfactory adaptation rates,with the synergistic effect betweenα-pinene and ethyl butyrate being particularly significant.Molecular docking revealed that hydrogen bonds in the active center of OR2W1(SER109/ASN155)and the multiple hydrogen bond network of OR1A1(THR239/SER/ARG122)were key binding modes,while OR52D1 had the weakest binding ability due to fewer and shorter hydrogen bonds.The rigid structure ofα-pinene caused steric hindrance,affecting the synergistic effect.Molecular dynamics further revealed that the high RMSD value of OR52D1 reflected its conformational flexibility,while OR2W1 enhanced binding stability through a“hydrophobic network”.This study confirms that olfactory perception is the result of hydrogen bonds,hydrophobic interactions,and dynamic equilibrium of molecular conformations,providing a theoretical basis for the synergistic mechanism of complex aroma systems.
基金financially supported by the National High Technology Research and Development Program(2016YFA0200303)the Beijing Natural Science Foundation(L172046,2192057)the National Natural Science Foundation of China(31771095,21875254 , 21905283).
摘要Astronauts are under high stress for a long time because of the microgravity condition,which leads to anxiety,affects their learning and memory abilities,and seriously impairs the health of astronauts.Aromatherapy can improve the physical and mental health of astronauts in a way that moisturizes them softly and silently.However,the strong volatility of fragrances and inconvenience of aroma treatment greatly limit their application in the field of spaceflight.In this study,reactive mesoporous silica nanoparticles were prepared to encapsulate and slowly release limonene.The limonene loaded nanoparticles were named limonene@mesoporous silica nanoparticles-cyanuric chloride(LE@MSNs-CYC).LE@MSNs-CYC were then applied to wallpaper to improve the convenience of aromatherapy.LE@MSNs-CYC could chemically react with the wallpaper,thus firmly adsorbed on the wallpaper.In the following,the mice were treated with hindlimb unloading(HU)to simulate a microgravity environment.The results showed that 28-day HU led to an increase in the level of anxiety and declines in learning,memory,and physical health in mice.LE@MSNs-CYC showed significant relief effects on anxiety,learning,memory,and physical health of HU treated mice.Subsequently,the molecular mechanisms were explored by hypothalamic-pituitary-adrenal axis related hormones,immune-related cytokines,learning,and memory-related neurotransmitters and proteins.
基金funded by the National Natural Science Foundation of China(Grants 32272453)Collaborative Innovation Fund of Shanghai Institute of Technology(XTCX 2023-15)Key Projects of the National Natural Science Foundation of China(32330080).
摘要The aroma of tea is one of the main sensory characteristics reflecting the quality of tea.The interactions between tea compounds were analyzed based on a S-curve method and molecular docking technology.This research examined the tea aroma intensity value before and after combination,the molecular docking energy through the predicted strength relationship,and the change of molecular docking energy and binding site to study compound interactions in the tea.The experiment showed that,according to the results of the determination of the sensory threshold value,the establishment of S-curve and the simulation calculation of molecular docking,the results of molecular docking and S-curve of the 10 characteristic compounds in tea selected in the present work reached the same conclusion.The results showed that studying the interaction of tea compounds based on molecular docking technology was simple,intuitive and reliable,which provided a theoretical basis and technical guidance for the study of the coordination action between compounds.
基金This research was supported by Capacity building project of local universities Science and Technology Commission of Shanghai Municipality(19090503500)National Natural Science Foundation of China(51803028,2018)+4 种基金Shanghai Gaofeng&Gaoyuan Project for University Academic Program Development,China Postdoctoral Science Foundation(2020M681125)DHU Distinguished Young Professor Programthe Fundamental Research Funds for the Central Universitiesthe Fundamental Research Funds for the Central UniversitiesGraduate Student Innovation Fund of Donghua University(CUSF-DH-D-2021020).
摘要Disposable hygiene products have evolved into the important parts for millions of people around the world,enhancing the convenience of daily lives.However,development of the disposable hygiene products is restricted by unsustainable production technology,complicated operation process,and poor liquid absorption performance of the absorbent core.Herein,integrated and three-dimensional(3D)multifunctional superabsorbent nonwovens with liquid-triggered fragrance release was prepared via green,fast and scalable multi efect hot-air anchoring method which physically crosslinking the joint thermobonding fbers and anchoring fragrance microcapsules/super absorbent polymer(SAP)onto adjacent thermo-bonding fbers simultaneously.The resulting composite nonwovens could three-dimensionally absorb water 33.14 times of its own weight without gel blockage between SAP,and correspondingly release increased intensity fragrance along with enhancing amount of water absorption.Absorption rate t1 and t2 is 83.62%and 50.62%higher than the commercial specimen respectively,and the air permeability is increased by 226.88%compared with the commercial specimen.The superabsorbent nonwovens with controllable fragrance release and odorant synergistic has the potential to be practically applied to functional textiles felds because of the excellent liquid absorption and controlled fragrance release performance,and is easy to be produced on a sustainable,pollution-free and large-scale industrial production.
基金the financial support of the Key Science and Technology Program of Anhui Province(202203a06020012)“Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province”.
摘要Maillard reaction intermediates(MRIs)derived from peanut protein hydrolysates(PPH)and xylose(Xyl)were prepared using the water bath combined with spray drying and vacuum drying.The monitoring of free amino content,browning precursors,and taste characteristics was carried out throughout the thermal treatment at low temperature,where the Maillard reaction process was slowed down,and the formation and degradation of MRIs were dynamically balanced at low conversion rates.The reaction between amino compounds and the reducing sugars contributed to the increased taste characteristics during the early phase of Maillard reaction.Fluorescence intensity was reduced after reaching its maximum value and browning intensity was significantly increased during vacuum drying,which confirmed that the Maillard reaction entered into an advanced stage.Vacuum drying also led to a significant increase in the total amount of volatile compounds in the subsequent thermal processing reaction(from 212.93 ng/g to 564.91 ng/g),which demonstrated that the higher fluorescence intensities resulted in the more accumulation of MRIs and better capabilities of flavor formation.
基金the financial support offered by Jiangsu Provincial Science and Technology Plan Project Key R&D Plan of Modern Agriculture(General Project)BE2023344the Jiangsu Provincial Science and Technology Plan project Rural Industry Revitalization(Agricultural Science and Technology Achievement Application Demonstartion Project)BN2023017+2 种基金Changzhou Science and Technology Projects-Agricultural Science and Technology CE20222011Jiangsu Funding Program for Excellent Postdoctoral Talent 2022ZB674National Natural Science Fund of China Research Fund for International Scientists 32350410407.
摘要Gradient dilution feeding substrate(GDFS)is regarded as an effective method for the production of active peptides,as it compensates for substrate limitations and minimizes substrate contamination of the ultrafiltration membrane.This study further investigated the impact of ultrasound-assisted gradient dilution feeding substrate(UA-GDFS)on the peptide yield and the intensity of umami.The chicken breast was used as ingredients.The umami compounds in the hydrolysate were determined using an automatic amino acid analyzer and HPLC.The hydrolysate’s umami intensity was determined by electronic tongue in all modes.These findings indicated that UA-GDFS enhanced the umami intensity and peptide yield.Hydrolysate from UA-GDFS with molecular weight below 1 kDa was analyzed by nano-scale liquid chromatography-tandem mass spectrometry(Nano-HPLC-MS/MS).Electronic tongue analysis showed that GPSGPVG and VDGPSGK had umami taste and could enhance the umami taste of monosodium glutamate(MSG)solution.Asn68 and His145 were important sites on T1R3 for umami peptide binding.