The flavor is a decisive sensory characteristic that determines the popularity of French fries(FFs).During high-oleic rapeseed oil(RO)frying,the flavor development of FFs showed three noticeable stages including break...The flavor is a decisive sensory characteristic that determines the popularity of French fries(FFs).During high-oleic rapeseed oil(RO)frying,the flavor development of FFs showed three noticeable stages including break-in(3.5%-7.5%of total polar compounds(TPC)),optimum(7.5%-22.18%of TPC),and degrading stages(above 22.18%of TPC).Further,in order to distinguish the key aroma compounds in each stage,the FFs prepared in RO at TPC of 3.5%(FF4),14.5%(FF15),and 26.96%(FF27)and their relevant oils(RO4,RO15,RO27)were selected for sensory-directed analysis.The results revealed that the FF4 had low contents of(E,E)-2,4-decadienal(deep-fried odor)which also caused lower sensory score in FF4 sample.The higher contents of(E,E)-2,4-decadienal in FF15 induced its higher deep-fried odor.The FF27 had higher hexanoic acid(sweaty odor),heptanoic acid,nonanoic acid,benzene acetaldehyde(stale odor),and trans-4,5-epoxy-(E)-2-decenal(metallic odor)compared with FF4 and FF15,thus leading to the undesirable flavor of FF27.Moreover,the decrease of 2,5-dimethylpyrazine and 2-ethyl-6-methyl-pyrazine in FF27 induced the lower roasty flavor,which may also lead to the decline of the sensory score.Similarly,the higher contents of(E)-2-undecenal,hexanoic acid,heptanoic acid,and nonanoic acid in RO27 lead to increase its rancid score and thus lower the sensory score.展开更多
As a base research on intelligentized search technique in seismic ruins,we study on human odor by a portable GC-MS.Qualitative analysis experiment demonstrate that isoprene,acetone and 6-methyl-5-heptene-2-one are sym...As a base research on intelligentized search technique in seismic ruins,we study on human odor by a portable GC-MS.Qualitative analysis experiment demonstrate that isoprene,acetone and 6-methyl-5-heptene-2-one are symbol of human odor.This research give important data to search survival base on artificial olfaction technique in seismic ruins.展开更多
P omegranate(Punica granatum L.)has attracted considerable attention in world markets due to its valuable nutrients and highly appreciated sensory properties.The aroma profiles of 4 varieties of pomegranate juice,incl...P omegranate(Punica granatum L.)has attracted considerable attention in world markets due to its valuable nutrients and highly appreciated sensory properties.The aroma profiles of 4 varieties of pomegranate juice,including Dahongtian(DP),Jingpitian(JP),Luyudan(LP),and Tianhonngdan(TP),were investigated via gas chromatography-mass spectrometry(GC-MS)and gas chromatography-olfactometry(GC-O)analyses.A total of 43 volatile compounds were identified by using GC-MS.Among these compounds,16 were considered as potential aroma-active compounds as detected by GC-O.These compounds belonged to the classes of terpinenes,alcohols,and aldehydes.Eleven volatile compounds were defined as the main contributors to the overall aroma of pomegranate juice due to their high odor activity values(OAVs≥1).Aroma recombination and omission tests confirmed thatβ-myrcene,1-hexanol,and(Z)-3-hexen-1-ol were the key aroma compounds,and limonene,1-octen-3-ol,linalool,and hexanal were important aroma-active compounds in DP samples.展开更多
Non-thermal plasma technology is a new type of odor treatment processing.We deal with H2Sfrom waste gas emission using non-thermal plasma generated by dielectric barrier discharge.On the basis of two criteria,removal ...Non-thermal plasma technology is a new type of odor treatment processing.We deal with H2Sfrom waste gas emission using non-thermal plasma generated by dielectric barrier discharge.On the basis of two criteria,removal efficiency and absolute removal amount,we deeply investigate the changes in electrical parameters and process parameters,and the reaction process of the influence of ozone on H2S gas removal.The experimental results show that H2S removal efficiency is proportional to the voltage,frequency,power,residence time and energy efficiency,while it is inversely proportional to the initial concentration of H2S gas,and ozone concentration.This study lays the foundations of non-thermal plasma technology for further commercial application.展开更多
The catalytic combustion technology for treating waste gases exiting from wastewater treatment system and oil separators in petrochemical enterprises was introduced in this article. Commercial application of this tech...The catalytic combustion technology for treating waste gases exiting from wastewater treatment system and oil separators in petrochemical enterprises was introduced in this article. Commercial application of this technology showed that the process ＂desulfurization and total hydrocarbon concentration homogenizationcatalytic combustion＂ and the associated WSH-1 combustion catalyst were suitable for treating volatile organic gases emitted from the oil separators, floatation tanks, inlet water-collecting well, waste oil tanks, etc. The commercial unit was equipped with an advanced auto-control system, featuring a simple operation and low energy consumption with good treatment effect. The purified gases could meet the national emission standard.展开更多
The concept of perception influenced by culture is pretty important in the study of intercultural communication.The perceptions of language and nonverbal language formed under various cultures intimate with each other...The concept of perception influenced by culture is pretty important in the study of intercultural communication.The perceptions of language and nonverbal language formed under various cultures intimate with each other during communication.This paper aims to explore the relationship between perception and culture in nonverbal communication through the study of eye language and body odor,and promote the communication among people of different culture as well.展开更多
This study aimed to discuss the removal of hydrogen sulfide （H2S） with non-thermal plasma produced by a multilayer tubular dielectric barrier discharge reactor,which is useful in the field of plasma environmental ap...This study aimed to discuss the removal of hydrogen sulfide （H2S） with non-thermal plasma produced by a multilayer tubular dielectric barrier discharge reactor,which is useful in the field of plasma environmental applications.We explored the influence of various factors upon H2S removal efficiency （ηH2S） and energy yield （Ey）,such as specific energy density （SED）,initial concentration,gas flow velocity and the reactor configuration.The study showed that we can achieve ηH2S of 91% and the best Ey of 3100 mg kWh-1 when we set the SED,gas flow velocity,initial H2S concentration and layers of quartz tubes at 33.2 J 1-1,8.0 m s-1,30 mg m-3 and five layers,correspondingly.The average rate constant for the decomposition of hydrogen sulfide was 0.206 g m-3 s-1.In addition,we also presented the optimized working conditions,byproduct analysis and decomposition mechanism.展开更多
基金financially supported by the National First-Class Discipline Program of Food Science and Technology (JUFSTR20180202)Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX20_1852)+1 种基金National Natural Science Foundation of China (31901728)Jiangsu Planned Projects for Postdoctoral Research Funds (2020Z297)
文摘The flavor is a decisive sensory characteristic that determines the popularity of French fries(FFs).During high-oleic rapeseed oil(RO)frying,the flavor development of FFs showed three noticeable stages including break-in(3.5%-7.5%of total polar compounds(TPC)),optimum(7.5%-22.18%of TPC),and degrading stages(above 22.18%of TPC).Further,in order to distinguish the key aroma compounds in each stage,the FFs prepared in RO at TPC of 3.5%(FF4),14.5%(FF15),and 26.96%(FF27)and their relevant oils(RO4,RO15,RO27)were selected for sensory-directed analysis.The results revealed that the FF4 had low contents of(E,E)-2,4-decadienal(deep-fried odor)which also caused lower sensory score in FF4 sample.The higher contents of(E,E)-2,4-decadienal in FF15 induced its higher deep-fried odor.The FF27 had higher hexanoic acid(sweaty odor),heptanoic acid,nonanoic acid,benzene acetaldehyde(stale odor),and trans-4,5-epoxy-(E)-2-decenal(metallic odor)compared with FF4 and FF15,thus leading to the undesirable flavor of FF27.Moreover,the decrease of 2,5-dimethylpyrazine and 2-ethyl-6-methyl-pyrazine in FF27 induced the lower roasty flavor,which may also lead to the decline of the sensory score.Similarly,the higher contents of(E)-2-undecenal,hexanoic acid,heptanoic acid,and nonanoic acid in RO27 lead to increase its rancid score and thus lower the sensory score.
文摘As a base research on intelligentized search technique in seismic ruins,we study on human odor by a portable GC-MS.Qualitative analysis experiment demonstrate that isoprene,acetone and 6-methyl-5-heptene-2-one are symbol of human odor.This research give important data to search survival base on artificial olfaction technique in seismic ruins.
基金funded by Shaanxi Natural Science Foundation (2019JQ-665)Xi’an Agricultural Science and Technology Project (20NYYF0021)supported by the Open Project Program of Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University (BTBU), Beijing 100048, China (SPFW2020YB12)
文摘P omegranate(Punica granatum L.)has attracted considerable attention in world markets due to its valuable nutrients and highly appreciated sensory properties.The aroma profiles of 4 varieties of pomegranate juice,including Dahongtian(DP),Jingpitian(JP),Luyudan(LP),and Tianhonngdan(TP),were investigated via gas chromatography-mass spectrometry(GC-MS)and gas chromatography-olfactometry(GC-O)analyses.A total of 43 volatile compounds were identified by using GC-MS.Among these compounds,16 were considered as potential aroma-active compounds as detected by GC-O.These compounds belonged to the classes of terpinenes,alcohols,and aldehydes.Eleven volatile compounds were defined as the main contributors to the overall aroma of pomegranate juice due to their high odor activity values(OAVs≥1).Aroma recombination and omission tests confirmed thatβ-myrcene,1-hexanol,and(Z)-3-hexen-1-ol were the key aroma compounds,and limonene,1-octen-3-ol,linalool,and hexanal were important aroma-active compounds in DP samples.
基金supported by the Open Project Program of State Key Laboratory of Petroleum Pollution Control(No.PPC2017010)CNPC Research Institute of Safety and Environmental Technology,and State Key Laboratory of Solid Waste Reuse for Building Materials(SWR2017002)+2 种基金National Natural Science Foundation of China(No.51108453)Program for New Century Excellent Talents in University(No.NCET120967)the Fundamental Research Funds for the Central Universities(No.2009QH03)
文摘Non-thermal plasma technology is a new type of odor treatment processing.We deal with H2Sfrom waste gas emission using non-thermal plasma generated by dielectric barrier discharge.On the basis of two criteria,removal efficiency and absolute removal amount,we deeply investigate the changes in electrical parameters and process parameters,and the reaction process of the influence of ozone on H2S gas removal.The experimental results show that H2S removal efficiency is proportional to the voltage,frequency,power,residence time and energy efficiency,while it is inversely proportional to the initial concentration of H2S gas,and ozone concentration.This study lays the foundations of non-thermal plasma technology for further commercial application.
文摘The catalytic combustion technology for treating waste gases exiting from wastewater treatment system and oil separators in petrochemical enterprises was introduced in this article. Commercial application of this technology showed that the process ＂desulfurization and total hydrocarbon concentration homogenizationcatalytic combustion＂ and the associated WSH-1 combustion catalyst were suitable for treating volatile organic gases emitted from the oil separators, floatation tanks, inlet water-collecting well, waste oil tanks, etc. The commercial unit was equipped with an advanced auto-control system, featuring a simple operation and low energy consumption with good treatment effect. The purified gases could meet the national emission standard.
文摘The concept of perception influenced by culture is pretty important in the study of intercultural communication.The perceptions of language and nonverbal language formed under various cultures intimate with each other during communication.This paper aims to explore the relationship between perception and culture in nonverbal communication through the study of eye language and body odor,and promote the communication among people of different culture as well.
基金Supported by programs of Research on the Technology and Equipment of Gaseous Pollutant Removal from the Emission of Household Garbage(15DZ12055904)Jointly Decomposition of Odorous Compounds by Dielectric Combined with Excimer Ultraviolet Emission(21577023)
文摘This study aimed to discuss the removal of hydrogen sulfide （H2S） with non-thermal plasma produced by a multilayer tubular dielectric barrier discharge reactor,which is useful in the field of plasma environmental applications.We explored the influence of various factors upon H2S removal efficiency （ηH2S） and energy yield （Ey）,such as specific energy density （SED）,initial concentration,gas flow velocity and the reactor configuration.The study showed that we can achieve ηH2S of 91% and the best Ey of 3100 mg kWh-1 when we set the SED,gas flow velocity,initial H2S concentration and layers of quartz tubes at 33.2 J 1-1,8.0 m s-1,30 mg m-3 and five layers,correspondingly.The average rate constant for the decomposition of hydrogen sulfide was 0.206 g m-3 s-1.In addition,we also presented the optimized working conditions,byproduct analysis and decomposition mechanism.
