为探究鳞杯伞子实体多糖(Clitocybe squamulosa fruiting body polysaccharide,CSFP)对玉米淀粉理化及结构特性影响,分别向玉米淀粉中加入基于干基质0、2%、4%、6%、8%的CSFP,研究其糊化特性、流变性能、微观结构、红外光谱和质构特性...为探究鳞杯伞子实体多糖(Clitocybe squamulosa fruiting body polysaccharide,CSFP)对玉米淀粉理化及结构特性影响,分别向玉米淀粉中加入基于干基质0、2%、4%、6%、8%的CSFP,研究其糊化特性、流变性能、微观结构、红外光谱和质构特性。结果表明:CSFP能够延缓玉米淀粉的糊化,具体表现为随着CSFP添加量的增加,玉米淀粉糊化的峰值黏度、最低黏度、最终黏度、崩解黏度、回生黏度均下降,而糊化温度有所升高。静态流变结果显示玉米淀粉糊和复配体系均呈现剪切稀释的假塑性流体,且流体指数(n)和稠度系数(K)分别出现随CSFP添加量的增加而上升和下降的趋势;动态流变结果显示玉米淀粉糊和复配体系呈弱凝胶行为。通过扫描电镜对样品的微观结构进行观察,发现CSFP的加入使得样品内部结构逐渐松散,空隙变大。红外光谱扫描结果表明,形成的复配体系中未形成新的基团,添加CSFP后,淀粉结构的短程有序程度上升。研究结果表明,CSFP使得玉米淀粉糊的硬度、弹性、内聚性、咀嚼性和胶黏性均有所下降,以期为当前易吞咽食品的开发提供参考。展开更多
Agricultural drought,a prolonged disaster with widespread impacts,exerts tremendous pressure on farm household activities,agricultural production,and economic development.The western region of Jilin Province,China,loc...Agricultural drought,a prolonged disaster with widespread impacts,exerts tremendous pressure on farm household activities,agricultural production,and economic development.The western region of Jilin Province,China,located in a semi-arid zone,where persistents drought exacerbates ecological fragility.With a larger proportion of its population living in rural areas,the life and production activities of households are particularly susceptible to drought-related challenges.This study focuses on the western part of Jilin Province,utilizing remote sensing data to calculate the temperature vegetation dryness index(TVDI)as a soil moisture monitoring indicator for drought assessment.The livelihood vulnerability index(LVI)and the improved LVI-Intergovernmental Panel on Climate Change(IPCC)index are employed to comprehensively assess the livelihood vulnerability of communes in the region and the impact of drought conditions on farmers'livelihood vulnerability.The results reveal a spatial trend of increasing drought severity from northeast to southwest,with temporally minor fluctuations observed in drought levels from 2005 to 2022.Livelihood vulnerability results indicate significant spatial and temporal variations,with education,health,food,and water playing key roles.Correlation analysis indicates a strong relationship between TVDI and LVI,highlighting the detrimental impact of drought on farmers'livelihoods.The study aims to provide a scientific foundation for managing livelihood vulnerability in the western part of Jilin Province and similar arid areas.Additionally,it seeks to offer strategic recommendations for policymakers to mitigate the adverse effects of drought,thereby reducing farmers'vulnerability and fostering sustainable socio-economic development.展开更多
文摘为探究鳞杯伞子实体多糖(Clitocybe squamulosa fruiting body polysaccharide,CSFP)对玉米淀粉理化及结构特性影响,分别向玉米淀粉中加入基于干基质0、2%、4%、6%、8%的CSFP,研究其糊化特性、流变性能、微观结构、红外光谱和质构特性。结果表明:CSFP能够延缓玉米淀粉的糊化,具体表现为随着CSFP添加量的增加,玉米淀粉糊化的峰值黏度、最低黏度、最终黏度、崩解黏度、回生黏度均下降,而糊化温度有所升高。静态流变结果显示玉米淀粉糊和复配体系均呈现剪切稀释的假塑性流体,且流体指数(n)和稠度系数(K)分别出现随CSFP添加量的增加而上升和下降的趋势;动态流变结果显示玉米淀粉糊和复配体系呈弱凝胶行为。通过扫描电镜对样品的微观结构进行观察,发现CSFP的加入使得样品内部结构逐渐松散,空隙变大。红外光谱扫描结果表明,形成的复配体系中未形成新的基团,添加CSFP后,淀粉结构的短程有序程度上升。研究结果表明,CSFP使得玉米淀粉糊的硬度、弹性、内聚性、咀嚼性和胶黏性均有所下降,以期为当前易吞咽食品的开发提供参考。
基金Under the auspices of Basic Construction Funds of Jilin Province in 2024 and 2023(No.2024C021-3,2023C030-1)Foundation of the Education Department of Jilin Province(No.JJKH20250317KJ)National Natural Science Foundation of China(No.42071223,42471223)。
文摘Agricultural drought,a prolonged disaster with widespread impacts,exerts tremendous pressure on farm household activities,agricultural production,and economic development.The western region of Jilin Province,China,located in a semi-arid zone,where persistents drought exacerbates ecological fragility.With a larger proportion of its population living in rural areas,the life and production activities of households are particularly susceptible to drought-related challenges.This study focuses on the western part of Jilin Province,utilizing remote sensing data to calculate the temperature vegetation dryness index(TVDI)as a soil moisture monitoring indicator for drought assessment.The livelihood vulnerability index(LVI)and the improved LVI-Intergovernmental Panel on Climate Change(IPCC)index are employed to comprehensively assess the livelihood vulnerability of communes in the region and the impact of drought conditions on farmers'livelihood vulnerability.The results reveal a spatial trend of increasing drought severity from northeast to southwest,with temporally minor fluctuations observed in drought levels from 2005 to 2022.Livelihood vulnerability results indicate significant spatial and temporal variations,with education,health,food,and water playing key roles.Correlation analysis indicates a strong relationship between TVDI and LVI,highlighting the detrimental impact of drought on farmers'livelihoods.The study aims to provide a scientific foundation for managing livelihood vulnerability in the western part of Jilin Province and similar arid areas.Additionally,it seeks to offer strategic recommendations for policymakers to mitigate the adverse effects of drought,thereby reducing farmers'vulnerability and fostering sustainable socio-economic development.
