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Mathematical Modeling and Effect of Various hot-air drying on Mushroom(Lentinus edodes)

Journal of Integrative Agriculture 2014年第1期13卷 207-216页

作者： GUO Xiao-hui XIA Chun-yan TAN Yu-rong CHEN Long MING Jian College of Food Science Southwest University Key Laboratory of Food Processing & Technology of Chongqing Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Presevation (Chongqing) Ministry of Agriculture

An experimental study was performed to determine the characteristics and drying process of mushroom （Lentinus edodes） by 6 different hot-air drying methods namely isothermal drying, uniform raise drying, non-uniform raise drying, uniform intermittent drying, non-uniform intermittent drying and combined drying. The chemical composition （dry matter, ash, crude protein, crude fat, total sugars, dietary fiber, and energy）, color parameters （L, a＊, b＊, c＊, and h~） and rehydration capacities were determined. Among all the experiments, non-uniform intermittent drying reached a better comprehensive results due to the higher chemical composition, better color quality associated with high bright （26.381＋5.842）, high color tone （73.670＋2.975）, low chroma （13.349a：3.456） as well as the highest rehydration （453.76% weigh of dried body）. Nine kinds of classical mathematical model were used to obtained moisture data and the Midili-kucuk model can be described by the drying process with the coefficient （R2 ranged from 0.99790 to 0.99967）, chi-square （X2 ranged from 0.00003 to 0.00019） and root mean square error （RMSE ranged from 0.000486 to 0.0012367）.

关键词： Lentinus edodes hot-air drying mathematical model

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drying characteristics and mathematical model of ultrasound assisted hot-air drying of carrots

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International Journal of Agricultural and Biological Engineering 2015年第4期8卷 124-132页

作者： Luo Denglin Liu Juan Liu Yuhong Ren Guangyue College of Food and Bioengineering Henan University of Science and TechnologyLuoyang 471023China

In order to improve the heat and mass transfer process in hot-air drying,power ultrasound was coupled directly to hot-air drying of fresh carrot *** effects of ultrasonic power,radiation distance,hot air velocity and temperature on drying characteristics were *** addition,the Page equation was used to fit the ultrasound assisted hot-air drying process of the carrot *** results showed that the drying rate of carrot slices increased with the increase of ultrasound power and the decrease of radiation *** ultrasound had a greater enhancement on hot-air drying at lower air velocity(0.5 m/s)and temperature(40ºC),especially at the middle and later periods(controlled by internal diffusion).The drying time of carrot slices using ultrasound assisted hot-air drying was shortened by 37.5%compared to that using hot-air drying at the condition with power of 150 W,radiation distance of 15 cm,air velocity of 1.0 m/s and temperature of 40º*** test indicators of the model meet the accuracy requirements,which show that the model can better fit the experimental values.

关键词： power ultrasound hot-air drying carrot slices drying rate model

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热风干燥和冷冻干燥对西洋参外观、显微特征和人参皂苷含量影响的比较研究

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Chinese Medicine and Natural Products 2024年第2期4卷 66-75页

作者：梁琦何林田晴晴冉东陶华黄勤万张庆吴春杰彭伟 State Key Laboratory of Southwestern Chinese Medicine Resources School of PharmacyChengdu University of Traditional Chinese MedicineChengduSichuanChina Sichuan Institute for Drug Control(Sichuan Testing Center of Medical Devices) ChengduSichuanChina Sichuan Huotai Pharmaceutical Co. LtdChengduSichuanChina Department of Molecular and Integrative Physiology University of MichiganAnn ArborMichiganUnited States

Purpose Our purpose was to compare the difference between hot-air dried American ginseng(HDAG)(Panacis Quinquefolii Radix)and freeze-dried American ginseng(FDAG)(Panacis Quinquefolii Radix)and provide a better drying approach for improv-ing the quality of American ginseng(Panacis Quinquefolii Radix).Methods In our present study,we compared the appearance features of HDAG and FDAG using a CR-410 colorimeter and scanning electron ***,we qualitatively and quantitatively determined ginsenosides in HDAG and FDAG by using UPLC-Q Exactive Orbitrap-MS/MS and high-performance liquid *** Our present results showed that compared to the hot-air drying method,freeze-drying(FD)has obvious advantages in not only good appearances but also higher bioactive constituents for drying the American ginseng(Panacis Quinquefolii Radix).Conclusion FD is beneficial for the retention of ginsenosides in American ginseng(Panacis Quinquefolii Radix)and also helpful for maintaining the bioactive effects of this functional food.

关键词： freeze-drying hot-air drying American ginseng Panacis Quinquefolii Radix ginsenosides

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Effect of pre-treatments on drying characteristics of Chinese jujube (Zizyphus jujuba Miller)

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International Journal of Agricultural and Biological Engineering 2014年第1期7卷 94-102页

作者： Zhu Baomeng Wen Xuesen Wei Guodong Institute of Pharmacognosy School of Pharmaceutical SciencesShandong UniversityJinan 250012China Shandong College of Traditional Chinese Medicine Yantai 265200ShandongChina

Chinese jujube is delicious and nourishing ***,fresh Chinese jujube is liable to rot and drying is a necessary *** drying is a time-consuming task due to the thick cuticle of Chinese *** improve its drying efficiency,fresh Chinese jujube was pretreated with nine different methods prior to hot-air *** these methods,dipping in 2%ethyl oleate plus 5%K_(2)CO_(3) for 10 min(alkaline emulsion of ethyl oleate,AEEO)was recommended for its time-saving effect,which was found more significant at lower drying *** beneficial effect was considered based on its cuticle destruction by AEEO *** the meantime,the drying process was divided into three stages;each of them obeyed the first order reaction *** energies for the first,second and third stages of control over jujube drying were 41.45 kJ/mol,35.24 kJ/mol and 49.52 kJ/mol,and reduced by 20.9%,22.1%and 29.0%,respectively,after AEEO pre-treatment,and the drying process was well predicted by Midilli et *** view of browning during drying at higher temperatures,AEEO pretreated jujube was suggested to be dried at 60°*** finding was considered to be helpful to the industrial drying of Chinese jujube.

关键词： Zizyphus jujuba Chinese jujube pre-treatment hot-air drying activation energy mathematical modelling

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