The application potential of cellulosic materials in natural composites and other fields needs to be explored to develop innovative, sustainable, lightweight, functional biomass materials that are also environmentally...The application potential of cellulosic materials in natural composites and other fields needs to be explored to develop innovative, sustainable, lightweight, functional biomass materials that are also environmentally friendly. This study investigated Typha angustifolia (Typha sp.) as a potential new raw material for extracting cellulose nanocrystals (CNCs) for application in wastewater treatment composites. Alkaline treatments and bleaching were used to remove cellulose from the stem fibres. The CNCs were then isolated from the recovered cellulose using acid hydrolysis. The study showed a few distinct functional groups (O-H, -C-H, =C-H and C-O, and C-O-C) in the Fourier Transform Infrared (FTIR) spectra. A scanning electron microscope (SEM) revealed the smooth surface of CPC and CNCs, which resulted from removing lignin and hemicellulose from powdered Typha angustifolia. Based on the crystalline index, the powdered Typha angustifolia, CPC, and CNCs were 42.86%, 66.94% and 77.41%. The loss of the amorphous section of the Typha sp. fibre resulted in a decrease in particle size. It may be inferred from the features of a Typha sp. CNC that CNCs may be employed as reinforcement in composites for wastewater treatment.展开更多
非特异性脂质转移蛋白(nsLTP,non-specific lipid transfer proteins)在植物脂质转运和分泌中发挥重要作用。本研究从薰衣草(Lavandula angustifolia)中克隆到2个II型nsLTP基因,命名为nsLTP2-1和nsLTP2-2,并对其进行功能分析。生信分析...非特异性脂质转移蛋白(nsLTP,non-specific lipid transfer proteins)在植物脂质转运和分泌中发挥重要作用。本研究从薰衣草(Lavandula angustifolia)中克隆到2个II型nsLTP基因,命名为nsLTP2-1和nsLTP2-2,并对其进行功能分析。生信分析表明,nsLTP2-1和ns LTP2-2分别编码119个和117个氨基酸,具有脂转移蛋白(LTP,lipid transfer proteins)保守结构域和8个高度保守的半胱氨酸残基;系统进化分析显示它们处于两个分支,与同科的紫苏(Perilla frutescens)相似性最高。基因表达分析显示2个基因均在花蕾中高表达,在叶片、茎和花瓣中几乎不表达,在花萼中的表达存在差异,nsLTP2-1和nsLTP2-2分别在成熟花萼和幼嫩花萼中表达量更高;2个基因在花蕾和叶片中的表达均受到强光诱导,且在花蕾中的表达均受脱落酸诱导,而叶片中nsLTP2-1和nsLTP2-2的表达分别受茉莉酸甲酯和乙烯诱导。亚细胞定位显示2个nsLTPs均定位在细胞膜和细胞壁上,可能与次生代谢物的转运有关。过表达nsLTP2-1和nsLTP2-2烟草叶片经尼罗红染色后,经485~543 nm激发光激发,叶片腺毛头部的荧光显示多于野生型,说明本研究中的nsLTPs可能在脂类的合成和转运中起重要作用。这些结果为明确薰衣草脂转移蛋白在脂类及萜类转运中的功能研究提供了参考。展开更多
[Objective] The experiment aimed to explore the possibility of introducing Elaeagnus angustifolia L. in saline land of West Jilin Province for improving local ecological environment. [Method] The Elaeagnus angustifoli...[Objective] The experiment aimed to explore the possibility of introducing Elaeagnus angustifolia L. in saline land of West Jilin Province for improving local ecological environment. [Method] The Elaeagnus angustifolia L. from Ningxia Province were sown in nursery and practice base of Forestry College in Beihua University to observe their phenophase, growth state, stress resistance and study the relations between survival rate and different cutting medium, grafting methods. [Result] Elaeagnus angustifolia L. could adapt to climate condition in Jilin area and grow well . Among 3 cold-proof measures, there was no freezing injury by soil burial method, although there was 2.8% and 3.9% mortality by covering grassy marshland and winding straw, the cold injury degree was light, so they could go through winter normally. Meanwhile, Elaeagnus angustifolia L. had good saline-alkali tolerance, drought resistance and flood resistance. The successful cutting and graft of Elaeagnus angustifolia L. provided a condition for planting in large-scale and knew the rooting rate of different cutting medium. [Conclusion] Elaeagnus angustifolia L. could be introduced to plant in West Jilin Province.展开更多
文摘The application potential of cellulosic materials in natural composites and other fields needs to be explored to develop innovative, sustainable, lightweight, functional biomass materials that are also environmentally friendly. This study investigated Typha angustifolia (Typha sp.) as a potential new raw material for extracting cellulose nanocrystals (CNCs) for application in wastewater treatment composites. Alkaline treatments and bleaching were used to remove cellulose from the stem fibres. The CNCs were then isolated from the recovered cellulose using acid hydrolysis. The study showed a few distinct functional groups (O-H, -C-H, =C-H and C-O, and C-O-C) in the Fourier Transform Infrared (FTIR) spectra. A scanning electron microscope (SEM) revealed the smooth surface of CPC and CNCs, which resulted from removing lignin and hemicellulose from powdered Typha angustifolia. Based on the crystalline index, the powdered Typha angustifolia, CPC, and CNCs were 42.86%, 66.94% and 77.41%. The loss of the amorphous section of the Typha sp. fibre resulted in a decrease in particle size. It may be inferred from the features of a Typha sp. CNC that CNCs may be employed as reinforcement in composites for wastewater treatment.
文摘非特异性脂质转移蛋白(nsLTP,non-specific lipid transfer proteins)在植物脂质转运和分泌中发挥重要作用。本研究从薰衣草(Lavandula angustifolia)中克隆到2个II型nsLTP基因,命名为nsLTP2-1和nsLTP2-2,并对其进行功能分析。生信分析表明,nsLTP2-1和ns LTP2-2分别编码119个和117个氨基酸,具有脂转移蛋白(LTP,lipid transfer proteins)保守结构域和8个高度保守的半胱氨酸残基;系统进化分析显示它们处于两个分支,与同科的紫苏(Perilla frutescens)相似性最高。基因表达分析显示2个基因均在花蕾中高表达,在叶片、茎和花瓣中几乎不表达,在花萼中的表达存在差异,nsLTP2-1和nsLTP2-2分别在成熟花萼和幼嫩花萼中表达量更高;2个基因在花蕾和叶片中的表达均受到强光诱导,且在花蕾中的表达均受脱落酸诱导,而叶片中nsLTP2-1和nsLTP2-2的表达分别受茉莉酸甲酯和乙烯诱导。亚细胞定位显示2个nsLTPs均定位在细胞膜和细胞壁上,可能与次生代谢物的转运有关。过表达nsLTP2-1和nsLTP2-2烟草叶片经尼罗红染色后,经485~543 nm激发光激发,叶片腺毛头部的荧光显示多于野生型,说明本研究中的nsLTPs可能在脂类的合成和转运中起重要作用。这些结果为明确薰衣草脂转移蛋白在脂类及萜类转运中的功能研究提供了参考。
基金Supported by the National Natural Science Foundation of China(30470129)the Natural Science Foundation of China University of North(the ninth file in 2007)~~
文摘[Objective] The experiment aimed to explore the possibility of introducing Elaeagnus angustifolia L. in saline land of West Jilin Province for improving local ecological environment. [Method] The Elaeagnus angustifolia L. from Ningxia Province were sown in nursery and practice base of Forestry College in Beihua University to observe their phenophase, growth state, stress resistance and study the relations between survival rate and different cutting medium, grafting methods. [Result] Elaeagnus angustifolia L. could adapt to climate condition in Jilin area and grow well . Among 3 cold-proof measures, there was no freezing injury by soil burial method, although there was 2.8% and 3.9% mortality by covering grassy marshland and winding straw, the cold injury degree was light, so they could go through winter normally. Meanwhile, Elaeagnus angustifolia L. had good saline-alkali tolerance, drought resistance and flood resistance. The successful cutting and graft of Elaeagnus angustifolia L. provided a condition for planting in large-scale and knew the rooting rate of different cutting medium. [Conclusion] Elaeagnus angustifolia L. could be introduced to plant in West Jilin Province.
