不同冷冻-解冻处理方式对猕猴桃品质的影响          下载免费PDF全文

李国龙  汪高玮  岳田利  王周利  赵旭博 《西北农业学报》2024,(1):90-98

以‘徐香’猕猴桃为原材料，系统探究不同冷冻温度（-20 ℃、-40 ℃、-50 ℃和-80 ℃）及解冻温度（4 ℃、15 ℃、25 ℃和35 ℃）组合对猕猴桃主要理化性质及香气成分的影响。结果表明：不同冷冻-解冻处理不会影响猕猴桃的色度；与鲜切猕猴桃一致，4 ℃/-50 ℃、4 ℃/-80 ℃和15 ℃/-80 ℃处理条件下猕猴桃的可溶性固形物含量均为16.0 oBrix。鲜切猕猴桃的可滴定酸和维生素C含量分别为1.22 g/hg 和45.30 mg/hg，处理后猕猴桃的可滴定酸含量为1.06~1.33 g/hg，维生素C含量降低17.62%~33.89%。不同处理后猕猴桃的多酚类物质损失率为20.44%~31.72%，且不同组合处理之间无显著差异。同时，不同处理对猕猴桃香气成分的种类和含量有一定损失，且较低的冷冻温度和解冻温度有利于香气成分的保持。综合考虑，-50 ℃/4 ℃和 -80 ℃/4 ℃冷冻-解冻组合方式可有效保持猕猴桃的品质，为猕猴桃的贮藏保鲜提供了技术支撑。  相似文献   

桃树废弃幼果的利用     

黄漫青  周湘元 《北京农学院学报》1999,14(3):39-42

利用春天桃树疏果时疏下来的小桃为原料，借鉴了南方蜜饯的制作特点，研制开发出３种风味独特的低糖桃脯，并介绍了它们的工艺流程和操作要点，具有良好的开发前景．  相似文献   

如何减轻果蔬储藏中侵染性病害     

李秋玉  王维坚等 《吉林粮食高等专科学校学报》1999,14(4):22-23,41

采用了辐射与低温臭氧相结合的方法，可以减轻果蔬储藏中的侵染性病害，同时，还可以延长果蔬的保鲜期。  相似文献   

老岭自然保护区的野生果树种质资源   总被引：4，自引：1，他引：3  

徐兴友 《河北林果研究》1998,13(1):79-82

青龙县老岭的野生果树种质资源比较丰富，初步查明有１２种，５０种。简要叙述了主要种的生物学特点及用途，进行了必要的讨论。  相似文献   

Changes on carbohydrates and nitrogen content in the bark tissues induced by artificial chilling and its relationship with dormancy bud break in Prunus sp.     

D. González-Rossia  C. Reig  V. Dovis  N. Gariglio  M. Agustí 《Scientia Horticulturae》2008

Stem cuttings of peach, nectarine, plum and apricot, obtained from 1-year-old shoots at leaf drop in autumn, were exposed at a constant 3.0 ± 0.1 °C to simulate different chilling accumulation treatments (0, 500, and 1000 chilling hours). A set of 10 excised shoots was forced to budbreak after chilling accumulation; a second set of 10 excised shoots was used to analyse sugars, starch, and ammonium-, nitric- and proteinaceous-nitrogen content in the bark tissues. Sorbitol, fructose and glucose were the main sugars in the bark tissues, whereas sucrose and rafinose showed the lowest quantities in all Prunus sp. studied. Sorbitol and starch concentration decreased whereas glucose and fructose concentration increased with chilling. Ammonium-nitrogen showed the more dramatic increase with medium chilling treatment, decreasing again at high chilling exposure. No modifications in proteinaceous- and nitric-nitrogen levels were observed due to chilling. Chilling treatments increasing flowering intensity showed high ammonium- and proteinaceous-nitrogen content in the bark tissues of the stem cuttings, whereas those reducing flowering intensity showed high starch and nitric-nitrogen content, in three of the four Prunus sp. studied. Ammonium-nitrogen content gives the highest correlation with flowering intensity.  相似文献   

膨大素处理对葡萄果实性状的影响   总被引：3，自引：0，他引：3  

于万春  高庆玉  戴正 《黑龙江农业科学》2008,(6)

以京亚和京秀两个葡萄品种为试材,以膨大素处理葡萄果实,结果表明:以花后15 d、浓度10 mg·kg-1的效果为最好.京亚和京秀两个品种座果率增加16.8%和10.3%;单果质量增加36.7%和28.7%;穗重增加47.9%和25.7%;果形指数减少0.036和0.048.果实中可溶性糖、有机酸和维生素C含量略有下降,增加果实的糖酸比.果实前期赤霉素含量增加,增加了果实的座果率;脱落酸含量的提高促进了代谢库细胞对同化物的吸收.  相似文献   

A new descriptive method for fruit firmness changes with various softening patterns of kiwifruit     

《Postharvest Biology and Technology》2013

We have proposed a new interpretation of fruit softening. This was accomplished by generating a hypothesis that probabilities of decay of fruit structure obey the Weibull probabilistic model that has been used in the field of reliability engineering. The elasticity of individual kiwifruit after harvest was continually and nondestructively measured until decomposition by using a laser Doppler vibrometer. The obtained decreasing pattern of elasticity of individual fruit was complex, diverse, and inhomogeneous. Nonetheless, it was satisfactorily explained by a tandem combination of 2 Weibull models involving 4 types of parameters: “shape” related to probability; “scale,” to velocity of decay; “location,” to time lag; and “mixing ratio,” to contribution of the 2 models. Averages of location, shape, and mixing ratio parameters obtained by the measurement of 33 fruit were significantly different between the 2 models, but the scale parameter was not. The results suggested that the complex softening patterns of individual kiwifruit could be described using the tandem model of Weibull distribution, and that the softening process of kiwifruit consisted of at least 2 independent decay phases that are characterized by 2 of 5 parameters: location and mixing ratio. Commencement of the first decay phase could be caused by ethylene treatment after harvest, and the second one spontaneously triggered after a certain time lag.  相似文献   

高效液相色谱法测定油茶肉质果、肉质叶的维生素C     

彭凌  刘主  朱必凤 《北方园艺》2007,(11):218-219

用高效液相色谱法测定油茶肉质果、肉质叶维生素C的含量.采用YWG-C18(10μm,4.6mm×250mm i.d.)色谱柱,以0.02 M醋酸钠缓冲液-甲醇为流动相,在254 nm波长下检测.回收率为:94.8%～101.2%.相对标准偏差小于2%.  相似文献   

中国伊犁天山野果林区系表征地理成分及区系发生的研究   总被引：6，自引：0，他引：6       下载免费PDF全文

崔大方  廖文波  羊海军  张宏达 《林业科学研究》2006,19(5):555-560

对中国伊犁天山野果林表征植物的组成、特点及性质进行了系统的研究,探讨野果林的来源和发展,结果表明:野果林区系成分是多元的,各类成分在此相互渗透,分布区重叠,使野果林区系没有绝对的本地特色.其中温带成分占有最高的比例(33.33%);西伯利亚-天山过渡成分(17.54%)是野果林植物区系连接北方安加拉(西伯利亚)植物区系的桥梁;天山-沿喜马拉雅成分(10.53%)又把野果林与华夏植物区系紧密联系在一起;新疆的大部分地区过去曾是特提斯海(Tethys)的一部分,所以现代野果林植被仍保留有古地中海成分的残迹(5.25%);天山是新疆境内植物属种最为丰富的地区,天山成分在各分布区类型中的比值也最高(33.33%),尤其是东天山特有的成分,则代表着野果林的土著部分,这一成分无疑是本地发生的适生种.野果林的区系发生是多方面的,主要有安加拉成分、古北极成分、古地中海成分、华夏区系成分和新疆本土成分.  相似文献   

桃树果实贮存水的动态变化     

高照全  张继祥  王小伟  魏钦平 《河北林果研究》2003,18(2):149-152

通过对盆栽桃树果实贮存水运转动态的数学模拟发现，果实的贮存水汇入蒸腾流的最大量只占全天茎流总量的1．4％左右。白天，贮存水从果实汇入蒸腾流；晚上，由树干流入果实。晴天贮存水的变化明显大于阴天，其变化规律与水势的变化相一致，而水势的变化又主要是由太阳辐射的变化引起的。  相似文献