以中早熟品种‘翠香’猕猴桃为研究对象,正常采收为对照组,延迟采收1~4周为处理组,将对照果与处理果进行3种处理:采收时(at harvest,AH)、常温贮藏至后熟(room temperature maturation,RTM)和低温贮藏后货架成熟(low-temperature matura...以中早熟品种‘翠香’猕猴桃为研究对象,正常采收为对照组,延迟采收1~4周为处理组,将对照果与处理果进行3种处理:采收时(at harvest,AH)、常温贮藏至后熟(room temperature maturation,RTM)和低温贮藏后货架成熟(low-temperature maturation,LTM)。本文基于果形果重、理化指标、贮藏特性、感官及营养品质等多方面解析延迟采收对‘翠香’猕猴桃品质的影响。结果表明,随着采收期推迟,猕猴桃的果形果重不受影响,硬度显著降低(P<0.05)。晚采显著提升了AH组的糖酸比并降低了RTM组和LTM组的可溶性固形物含量(P<0.05)。晚采1周有效抑制了腐烂和冷害的出现。延迟采收显著降低了果实的b^(*)值(P<0.05)但能维持LTM组的质构品质,显著降低AH组的抗坏血酸含量(P<0.05),同时减缓LTM组抗坏血酸的降解并维持其抗氧化能力。该研究可为延迟采收在猕猴桃上的应用提供理论依据与参考。展开更多
早采行为已成为制约猕猴桃产业经济效益提高的主要因素之一。该文基于外观品质、理化特性及贮藏特性等多维度解析早采猕猴桃果实的品质演变规律。结果表明,早采3周和4周的果实的外形还未停止生长,果形指数较高,单果重较低,造成严重的产...早采行为已成为制约猕猴桃产业经济效益提高的主要因素之一。该文基于外观品质、理化特性及贮藏特性等多维度解析早采猕猴桃果实的品质演变规律。结果表明,早采3周和4周的果实的外形还未停止生长,果形指数较高,单果重较低,造成严重的产量损失。其次,无论是采收时(at harvest,AH),常温成熟(room temperature maturation,RTM),还是冷藏成熟(low temperature maturation,LTM),早采猕猴桃的可溶性固形物含量均显著低于正常采收组。早采4周的猕猴桃常温成熟后,果实糖含量较低而酸含量较高;冷藏成熟后,相比正常采收组,早采4周的猕猴桃糖和酸含量分别损失73%和29.76%,糖酸比严重失调。RTM和LTM处理后,早采2~4周猕猴桃的失重率和腐烂率随采收期的提前而显著提高。经LTM处理,早采2~4周猕猴桃均发生了较为严重的冷害症状,其冷害率、冷害指数、细胞膜透性均显著高于正常采收期。该研究探明了早采对猕猴桃外观品质、理化品质和贮藏特性的影响,为猕猴桃适时采收提供一定的理论依据。展开更多
In this paper,we report a novel measurement system based on the development of Fudan Scanning Proton Microscopy(SPM) facility.By using Si-PIN diode(Hamamatsu S1223-01) detector,scanning transmission ion microscopy(STI...In this paper,we report a novel measurement system based on the development of Fudan Scanning Proton Microscopy(SPM) facility.By using Si-PIN diode(Hamamatsu S1223-01) detector,scanning transmission ion microscopy(STIM) measurement system has been set up.It can provide density and structural images with high probing efficiency and non-destruction by utilizing the energy loss of high energy(MeV) and focused ions penetrating through a thin sample.STIM measurement is able to map the density distribution of organic elements which mostly compose biology materials,such information can not be detected by using conventional Be-windowed Si(Li) X-ray detector in Particle Induced X-ray Emission(PIXE) technique.The spatial resolution capability of STIM is higher than PIXE technique at same accelerator status.As a result of STIM measurement,Paramecium attached on the top of Kapton tube was measured by STIM.展开更多
文摘以中早熟品种‘翠香’猕猴桃为研究对象,正常采收为对照组,延迟采收1~4周为处理组,将对照果与处理果进行3种处理:采收时(at harvest,AH)、常温贮藏至后熟(room temperature maturation,RTM)和低温贮藏后货架成熟(low-temperature maturation,LTM)。本文基于果形果重、理化指标、贮藏特性、感官及营养品质等多方面解析延迟采收对‘翠香’猕猴桃品质的影响。结果表明,随着采收期推迟,猕猴桃的果形果重不受影响,硬度显著降低(P<0.05)。晚采显著提升了AH组的糖酸比并降低了RTM组和LTM组的可溶性固形物含量(P<0.05)。晚采1周有效抑制了腐烂和冷害的出现。延迟采收显著降低了果实的b^(*)值(P<0.05)但能维持LTM组的质构品质,显著降低AH组的抗坏血酸含量(P<0.05),同时减缓LTM组抗坏血酸的降解并维持其抗氧化能力。该研究可为延迟采收在猕猴桃上的应用提供理论依据与参考。
文摘早采行为已成为制约猕猴桃产业经济效益提高的主要因素之一。该文基于外观品质、理化特性及贮藏特性等多维度解析早采猕猴桃果实的品质演变规律。结果表明,早采3周和4周的果实的外形还未停止生长,果形指数较高,单果重较低,造成严重的产量损失。其次,无论是采收时(at harvest,AH),常温成熟(room temperature maturation,RTM),还是冷藏成熟(low temperature maturation,LTM),早采猕猴桃的可溶性固形物含量均显著低于正常采收组。早采4周的猕猴桃常温成熟后,果实糖含量较低而酸含量较高;冷藏成熟后,相比正常采收组,早采4周的猕猴桃糖和酸含量分别损失73%和29.76%,糖酸比严重失调。RTM和LTM处理后,早采2~4周猕猴桃的失重率和腐烂率随采收期的提前而显著提高。经LTM处理,早采2~4周猕猴桃均发生了较为严重的冷害症状,其冷害率、冷害指数、细胞膜透性均显著高于正常采收期。该研究探明了早采对猕猴桃外观品质、理化品质和贮藏特性的影响,为猕猴桃适时采收提供一定的理论依据。
基金Supported by Shanghai Synchrotron Radiation Facility project
文摘In this paper,we report a novel measurement system based on the development of Fudan Scanning Proton Microscopy(SPM) facility.By using Si-PIN diode(Hamamatsu S1223-01) detector,scanning transmission ion microscopy(STIM) measurement system has been set up.It can provide density and structural images with high probing efficiency and non-destruction by utilizing the energy loss of high energy(MeV) and focused ions penetrating through a thin sample.STIM measurement is able to map the density distribution of organic elements which mostly compose biology materials,such information can not be detected by using conventional Be-windowed Si(Li) X-ray detector in Particle Induced X-ray Emission(PIXE) technique.The spatial resolution capability of STIM is higher than PIXE technique at same accelerator status.As a result of STIM measurement,Paramecium attached on the top of Kapton tube was measured by STIM.