[1]孙 旭,姜 东,徐 莉,等.银杏白果干燥过程中水分分布及迁移的变化[J].南京林业大学学报(自然科学版),2019,43(06):188-192.
 SUN Xu,JIANG Dong,XU Li,et al.Moisture distribution and migration of Ginkgo biloba seeds during air drying process[J].Journal of Nanjing Forestry University(Natural Science Edition),2019,43(06):188-192.





Moisture distribution and migration of Ginkgo biloba seeds during air drying process
孙 旭1姜 东2徐 莉2花彤彤3宣 艳4*曹福亮3
(1.南京林业大学信息科学技术学院,江苏 南京 210037; 2.南京林业大学理学院,江苏 南京 210037; 3.南京林业大学林学院,江苏 南京 210037; 4.南京林业大学现代分析测试中心,江苏 南京 210037)
SUN Xu1 JIANG Dong2 XU Li2 HUA Tongtong3 XUAN Yan4* CAO Fuliang3
(1.College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China; 2. College of Science, Nanjing Forestry University, Nanjing 210037, China; 3. College of Forestry, Nanjing Forestry University, Nanjing 210037, China; 4. Advanced Analysis and Testing Center, Nanjing Forestry University, Nanjing 210037, China)
银杏白果 水分迁移 干燥 低场核磁共振 横向弛豫时间
ginkgo seed moisture transformation dry low field-nuclear magnetic resonance transverse relaxation time
【目的】探讨银杏白果在干燥过程中水分分布、迁移规律及低场核磁共振信号量与含水量之间的关系,为银杏白果水分传递模型的建立以及储存过程中含水量的快速测定提供依据。【方法】利用低场核磁共振技术,对不同热风干燥温度(50、60、70、80、90 ℃)处理的银杏白果中氢核的横向弛豫衰减信号进行测试,并利用SIRT模型对数据进行反演,得出横向弛豫时间T2的反演数据。利用自旋回波脉冲序列对银杏白果的质子密度加权成像。【结果】银杏白果中的水分主要有3种存在状态,分别为结合水(0.79~7.32 ms)、束缚水(13.67~89.07 ms)和自由水(109.70~1 072.27 ms)。经过热风干燥处理改变了银杏白果中水分的结合状态,水分发生明显迁移,自由水和束缚水的信号幅值随干燥温度的升高而逐渐减弱。不同含水率银杏白果的反演峰总面积不同,随着干基含水率的增加,核磁共振信号增强、峰面积增大,两者具有显著的相关性,拟合方程为y=7 436.46x + 153.32(R2=0.993)。核磁共振成像技术通过图片明暗的不同,直观地呈现出不同阶段的水分含量。【结论】干基含水率与核磁共振横向弛豫时间、弛豫峰面积之间有较好的相关性,可以利用低场核磁技术快速检测出银杏白果中的水分含量。通过核磁共振图谱也可以直观地观察银杏白果内部水分含量的变化。
【Objective】 The water composition of Ginkgo biloba seeds plays an important role in its physiological metabolism and affects its quality. Information about moisture distribution and migration in G. biloba seeds during hot air drying can provide data to optimize drying and rapidly determine the water content during storage. 【Method】The Carr-Purcell-Meiboom-Gill decay signals were obtained during hot air drying of G. biloba seeds by low-field nuclear magnetic resonance(NMR)equipped with a 0.5 T permanent magnet and proton resonance frequency of 21 MHz at a temperature of 32℃. The transverse relaxation time(T2)was calculated based on the decay signal data using the SIRT algorithm, which provides the position and area of each peak. NMR images were obtained by SE imaging sequence. 【Result】 The drying rate increased with an increase in the air temperature during hot air drying. For all states of water, T2 followed a decreasing trend during drying. The states of water could be classified into three main categories: bound water(0.79-7.32 ms), weakly bound water(13.67-89.07 ms), and free water(109.70-1 072.27 ms). The moisture state of G. biloba seeds changed, and free water and weakly bound water were gradually removed during hot air drying. Increased water content significantly correlated with stronger NMR signals and larger peak areas. This phenomenon can be described by this equation: y = 7 436.46 x + 153.32(R2 = 0.993). NMR imaging was used to visualize proton images at different stages in the light and dark. 【Conclusion】 There is a high correlation between moisture content and NMR relaxation peak value. The water content of G. biloba seeds can also be observed directly using a nuclear magnetic map.


[1] 杨世龙,徐莉,曹福亮,等.配位法对银杏叶初提物脱除银杏酚酸的效果[J].林业科技开发,2015,29(2): 66-69.DOI: 10.13360/j.issn.1000-8101.2015.02.016. YANG S L, XU L, CAO F L et al. Effects of coordination method on removing ginkgolic acids from extracts of Ginkgo biloba(EGb)[J]. China Forestry Science and Technology, 2015,29(2):66-69. [2] CAO C, SU Y, HAN D, et al. Ginkgo biloba exocarp extracts induces apoptosis in Lewis lung cancer cells involving MAPK signaling pathways[J]. Journal of Ethnopharmacology,2017(198):379-388.DOI:10.1016/j.jep. 2017.01.009. [3] HAN D, CAO C, SU Y, et al. Ginkgo biloba exocarp extracts inhibits angiogenesis and its effects on Wnt/β-catenin-VEGF signaling pathway in Lewis lung cancer[J]. Journal of Ethnopharmacology, 2016(192): 406-412. DOI: 10.1016/j.jep. 2016. 09. 018. [4] YANG Y M, WANG Y F, LI Y Y, et al. Thermal stability of ginkgolic acids from Ginkgo biloba and the effects of ginkgol C17:1 on the apoptosis and migration of SMMC7721 cells[J]. Fitoterapia, 2014, 98: 66-76.DOI:10.1016/j.fitote.2014.07.003. [5] CAO J, CHEN L Y, CAO F L, et al. Efficient extraction of proanthocyanidin from Ginlgo biloba leaves employing rationally designed deep eutectic solvent-water mixture and evaluation of the antioxidant activity[J]. Journal of Pharmaceutical and Biomedical Analysis, 2018,158: 317-326.DOI: 10.1016/j.jpba.2018.06.007. [6] 杨强,李新华,王琳,等. 银杏白果多糖的物化性质及抗氧化活性研究[J]. 现代食品科技,2013,29(10): 2395-2400.DOI:10.13982/j.mfst.1673-9078. 2013. 10. 008. YANG Q, LI X H, WANG L,et al. Physicochemical properties and antioxidant activity of Ginkgo biloba nut[J]. Modern Food Science and Technology, 2013, 29(10): 2395-2400. [7] OH S, SHINTANI R, KOIKE S, et al. Ginkgo fruit extract as an additive to modify rumen microbiota and fermentation and to mitigate methane production[J]. Journal of Dairy Science, 2017,100(3): 1923-1934. DOI: 10.3168/jds.2016-11928. [8] CAMIRE M E, DOUGHERTY M P, BRIGGS J L. Antioxidant-rich foods retard lipid oxidation in extruded corn[J]. Cereal Chemistry, 2005, 82(6): 666-670.DOI: 10.1094/CC-82-0666. [9] OSCAR R, VALERIA E, CARMEN R, et al. Application of power ultrasound on the convective drying of fruits and vegetables: effects on quality[J]. Journal of the Science of Food and Agriculture, 2018, 98(5): 1660-1673.DOI: 10.1002/jsfa.8673. [10] CATHERINE R, Inès P, ISABELL B. NIR spectroscopy for the quality control of Moringa oleifera(Lam.)leaf powders: Prediction of minerals, protein and moisture contents[J]. Food chemistry, 2018(261): 311-321. DOI.10.1016/j.foodchem.2018. 04.066. [11] LILIANA S, ELISABETA B, OANA V,et al. Effect of different drying methods on moisture ratio and rehydration of pumpkin slices[J]. Food Chemistry, 2016, 195:104-109.DOI:10.1016/j.foodchem.2015. 03.12.5. [12] 陈琳,董春旺,高明珠,等. 基于近红外光谱的红茶干燥中含水率无损检测方法[J]. 茶叶科学,2016(2):184-190.DOI:10.3969/j.issn.1000-369X. 2016. 02. 011. CHEN L, DONG C W, GAO M Z. Nondestructive measurement of moisture of black tea in drying process based on near infrared spectroscopy[J].Journal of Tea Science, 2016(2):184-190. [13] 鞠兴荣,汪海峰.微波干燥对银杏叶中有效成分的影响[J]. 食品科学, 2002(12): 56-58. DOI:10.3321/ j.issn:1002-6630.2002.12.010. JU X R, WANG H F. Influence of microwave desiccation on effective components of Ginkgo biloba leaves[J]. Food Science, 2002(12): 56-58. [14] NOEMI P, GIUSEPPINA A, Paola R, et al. Evolution of physicochemical properties of pear during drying by conventional techniques, portable-NMR, and modelling[J]. Journal of Food Engineering, 2018, 230: 82-98. DOI: 10.1016/j.jfoodeng. 2018.02.028. [15] 张绪坤,祝树森,黄俭花,等.用低场核磁分析胡萝卜切片干燥过程的内部水分变化[J]. 农业工程学报, 2012, 28(22): 282-287.DOI: 10.3969/j.issn.1002-6819.2012.22.039. ZHANG X K, ZHU S C, HUANG J H,et al. Analysis on internal moisture changes of carrot slices during drying process using low-field NMR[J].Transactions of the Chinese Society of Agricultural Engineering, 2012, 28(22): 282-287. [16] MARíA G, Hélène L, HANNES M, et al. Low field nuclear magnetic resonance on the effect of salt and modified atmosphere packaging on cod(Gadus morhua)during superchilled storage[J]. Food Research Internation,2011,44(1):241-249. DOI: 10.1016/j. foodres.2010.10.029. [17] 丁正耀,朱德泉,陶程云,等.高水分小麦干燥特性及其数学模型的研究[J]. 农机化研究, 2012, 34(9): 55-60. DOI: 10.3969/j.issn.1003-188X.2012.09.013. DING Z Y, ZHU D Q, TAO C Y,et al. Study on hot air drying characteristic of high-moisture wheat and its mathematical model[J].Journal of Agricultural Mechanization Research,2012, 34(9): 55-60. [18] 李文峰,肖旭霖.不同干燥方法对紫薯干燥效率及品质的影响[J].中国农业科学, 2014, 47(7):1397-1408.DOI: 10.3864/j.issn.0578-1752.2014.07.017. LI W F, XIAO X L. Effect of different drying methods on drying efficiency and quality of purple sweet potato[J].Scientia Agricultura Sinica, 2014, 47(7): 1397-1408. [19] 宋超,辛霞,陈晓玲,等.三种保存条件下水稻和小麦种质资源安全保存期的分析[J].植物遗传资源学报,2014,15(4):685-691.DOI: 10.13430/j.cnki. jpgr. 2014.04.001. SONG C, XIN X, CHEN X L,et al. Safety storage life of rice and wheat germplasm resources at three storage conditions[J]. Journal of Plant Genetic Resources, 2014, 15(4): 685-691. [20] THYGESEN L, THYBO A, ENGELSEN S. Prediction of sensory texture quality of boiled potatoes from low-field 1 HNMR of raw potatoes: the role of chemical constituents[J]. LWT-Food Science and Technology,2001,34(7): 469-477.DOI: 10.1006/fstl. 2001.0788.


[1]张 婷,杨 平*.土体单向冻结对土中水分迁移的影响[J].南京林业大学学报(自然科学版),2013,37(01):117.[doi:10.3969/j.issn.1000-2006.2013.01.021]
 ZHANG Ting,YANG Ping*.Effects of unilateralist freezing on the moisture migration of soil[J].Journal of Nanjing Forestry University(Natural Science Edition),2013,37(06):117.[doi:10.3969/j.issn.1000-2006.2013.01.021]


收稿日期:2018-08-03 修回日期:2018-10-19 基金项目:国家重点研发计划(2017YFD0600706)。 第一作者:孙旭(121957684@qq.com)。*通信作者:宣艳(xuanyannfu@njfu.edu.cn),实验师,博士,ORCID(0000-0002-1602-5953)。
更新日期/Last Update: 2019-11-30