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傅立叶红外光谱 1

扫描电子显微镜(SEM) 1

桉木纤维 1

碱处理 1

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Bio-modification of eucalyptus chemithermomechanical pulp

YANG Qifeng, ZHAN Huaiyu, FU Shiyu, WANG Shuangfei, LI Kecheng

《化学科学与工程前沿(英文)》 2008年 第2卷 第1期   页码 28-33 doi: 10.1007/s11705-008-0007-2

摘要: Eucalyptus chemithermomechanical pulp (CTMP) was modified with the white-rot fungus 19-6 in a stationary culture condition. Different factors that influence the effect of white-rot fungus treatment, including additional nutrition, pH value, temperature, treatment time and oxygen input were investigated. The results show that the energy consumption of post refining of CTMP treated by white-rot fungus 19-6 was lower than that of untreated pulp and the strength properties also obviously improved. At a freeness level of about 330 mL, compared to the untreated pulp, the tensile index, tear index and internal bonding strength increased by 21.3%, 27.4% and 33.1%, respectively. Unfortunately, the treatment with white-rot fungus substantially decreased all optical properties except for opacity, which was essentially unchanged. Brightness and light scattering coefficient were reduced to as much as 25% and 21% compared to the untreated pulps. However, after a tow-stage “NaSO–HO” bleaching, the final brightness can reach 70.3% ISO, which is similar to that of the untreated CTMP.

关键词: Different     white-rot     NaSO–HO     unchanged     strength    

碱处理对桉木纤维挤压结合机理的影响

彭万喜,林芝,李年存

《中国工程科学》 2014年 第16卷 第4期   页码 64-68

摘要:

采用桉木纤维为原料,探讨碱处理对板材挤压结合机理的影响。结果表明:碱处理对木质素、半纤维素都有不同程度的降解作用;在热压制板过程中,经过降解作用的木材成分经适当的热压工艺能够发生聚合反应从而粘合成板;强碱(NaOH)对桉木纤维的影响大于弱碱溶液(Na2CO3),且处理时间为10 h 较适宜;碱处理过程产生的活性羟基,热压后可以缔合形成氢键,增加了纤维之间的结合力,有利于桉木纤维自身粘合成板。

关键词: 桉木纤维     碱处理     傅立叶红外光谱     扫描电子显微镜(SEM)    

species associated with eucalypt diseases in southern China

Shuaifei CHEN, Qianli LIU, Guoqing LI, Michael J. WINGFIELD

《农业科学与工程前沿(英文)》 2017年 第4卷 第4期   页码 433-447 doi: 10.15302/J-FASE-2017173

摘要: The genus includes several important pathogens of species of and , mainly causing leaf and shoot blight. Recently, extensive shoot and leaf dieback and stem cankers suspected to be diseases have been found on young trees in Guangdong and Hainan Provinces. The occurrence of species and their association with eucalypt hosts within China needs to be investigated for tree diseases management. The isolates from the diseased samples were identified based on their morphological structures and phylogenetic analyses with DNA sequence data for the internal transcribed spacer region and large ribosome subunit RNA of the nuclear rDNA. This work revealed that three species of were present: from , from , both isolated from young eucalypt leaves and shoots in Guangdong Province, and , which was isolated from stem cankers of at four different sites across Guangdong and Hainan Provinces. These results confirmed that agents were associated with the diseases occurring on eucalypt hosts in South China. This is the first report of in Asia and the first report of in China on trees.

关键词: Corymbia     Eucalyptus     forest pathogens     plantations     Myrtaceae    

Advances in eucalypt research in China

Yaojian XIE, Roger J. ARNOLD, Zhihua WU, Shuaifei CHEN, Apeng DU, Jianzhong LUO

《农业科学与工程前沿(英文)》 2017年 第4卷 第4期   页码 380-390 doi: 10.15302/J-FASE-2017171

摘要: Eucalypt plantations in China currently exceed 4.5 Mhm , and this country has the third largest area of such plantations after India and Brazil. China’s eucalypt industry now comprises a complex, multifaceted industry including seedling propagation, fertilizer production and supply, plantation silviculture, harvesting and transport, wood processing for products including lumber, pulp and paper, and wood-based panels, as well as bioenergy production and various forest byproducts and non-wood forest products. In 2015, the combined value of output of this whole industry was around 300 billion CNY. Chinese research and development (R&D) has been instrumental in supporting growth and development across the whole breadth of the country’s eucalypt industry. In this report, recent advances in this R&D are reviewed under six key topics: (1) advanced propagation technology; (2) genetic resources and breeding; (3) targeted silviculture; (4) eucalypt disease and pest management; (5) enhancing plantation ecology and sustainability; and (6) wood processing and byproduct technology. R&D has greatly facilitated expansion and proliferation of all parts of China’s eucalypt industry. This industry is now of major importance to China’s economy; it involves tens of thousands of growers and companies that provide livelihoods for hundreds of thousands of people.

关键词: China Eucalypt Research Centre     timber production     tree improvement     silviculture     forest industry     Eucalyptus    

标题 作者 时间 类型 操作

Bio-modification of eucalyptus chemithermomechanical pulp

YANG Qifeng, ZHAN Huaiyu, FU Shiyu, WANG Shuangfei, LI Kecheng

期刊论文

碱处理对桉木纤维挤压结合机理的影响

彭万喜,林芝,李年存

期刊论文

species associated with eucalypt diseases in southern China

Shuaifei CHEN, Qianli LIU, Guoqing LI, Michael J. WINGFIELD

期刊论文

Advances in eucalypt research in China

Yaojian XIE, Roger J. ARNOLD, Zhihua WU, Shuaifei CHEN, Apeng DU, Jianzhong LUO

期刊论文