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Forest gaps regulate seed germination rate and radicle growth of an endangered plant species in a subtropical natural forest

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Plant Diversity 2022年第5期44卷 445-454页

作者： Jing Zhu Lan Jiang De-Huang Zhu Cong Xing Meng-Ran Jin Jin-Fu Liu zhong-sheng he Key Laboratory of Fujian Universities for Ecology and Resource Statistics College of ForestryFujian Agriculture and Forestry UniversityFuzhou350002China College of Ecology and Resources Engineering Wuyi UniversityWuyishanFujian354300China

The survival rate of Castanopsis kawakamii from seed to seedling is relatively low,leading to difficulties in the regeneration of its natural *** gaps play a vital role in plant regeneration and biodiversity maintenance in forest ***,our understanding of the effects of gap size and within-gap position on the seed germination and radicle growth of *** is still *** particular,our knowledge on the relationship between gap size and environmental factors and their influence on seed germination and radicle growth is *** the present study,we studied the influences of forest gaps and within-gap position on seed regeneration on the germination and radicle growth of an endangered species *** in a subtropical natural forest in *** selected three large gaps(LG,gap size above 200 m^(2)),three medium gaps(MG,gap size 50-100 m^(2)),three small gaps(SG,gap size 30-50 m^(2)),and non-gap(NG),and planted the seeds of *** in five positions within each *** results showed that(1)the influence of forest gaps on seed germination rate was,from highest to lowest,medium gaps(51%),non-gap(47%),small gaps(40%)and large gaps(17%),and the seed germination rate was the highest in all positions in medium gaps,with the exception of the east position.(2)Radicle length in forest gaps was,from highest to lowest,medium gaps,small gaps,large gaps and non-gap,and it was the highest in the east,south,west and north positions of medium gaps.(3)Canopy openness(gap size)and air temperature were the main factors influencing seed germination and radicle growth of *** concluded that medium-sized gaps were the most suitable for seed germination and radicle growth of ***,and they promote the regeneration of this endangered species in the investigated natural forest.

关键词： Forest gap Within-gap position Seed germination Radicle growth Castanopsis kawakamii

Relative position of seeds driven the seedling growth are mediated by root-leaf traits

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Journal of Plant Ecology 2024年第2期17卷 24-35页

作者： Jing Zhu Xue-Lin Wang Xing Jin Lan Jiang Hong-Yu Lin Yang Hu Jin-Fu Liu zhong-sheng he College of Forestry Fujian Agriculture and Forestry UniversityFuzhou 350002China Key Laboratory of Fujian Universities for Ecology and Resource Statistics Fujian Agriculture and Forestry UniversityFuzhou 350002China Zhenjiang Natural Resources and Planning Bureau Economic and Technological Development Zone Branch Zhenjiang 212132China

Variations in plant traits are indicative of plant adaptations to forest environments,and studying their relationships with tree growth provides valuable insights into forest *** spatial arrangement of plant seeds within the forest litter or soil critically infuences the variations of root-leaf traits,thereby affecting the adaptive strategies of emerging ***,our current understanding of the impacts of individual root-leaf traits on seedling growth in different relative position,and whether these traits together affect growth,remains *** study focuses on the dominant tree species,Castanopsis kawakamii,within the Sanming *** Nature Reserve of *** present experiment aimed to examine the variations in root-leaf traits of seedling,focus on the relative positions of seeds within different layers:beneath or above the litter layer,or within the bare soil layer(without litter).Our fndings provided evidence supporting a coordinated relationship between root and leaf traits,wherein leaf traits varied in conjunction with root traits in the relative positions of ***,we observed that seedlings exhibited higher values for specifc leaf area and average root diameter,while displaying lower root tissue *** mixed model explained 86.1%of the variation in root-leaf traits,surpassing the variation explained by the relative ***,soil nitrogen acted as a mediator,regulating the relationship between seedling growth and root-leaf traits,specifcally leaf dry matter content and root tissue ***,future studies should consider artifcially manipulating tree species diversity based on root-leaf traits characteristics to promote forest recovery.

关键词： relative growth rate coordination leaf traits root traits soil nitrogen content seed relative positions

K_2O助剂对合成碳酸二甲酯用Cu-Ni/MoO_3-SiO_2催化剂吸附和反应性能的影响

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燃料化学学报 2001年第6期29卷 504-508页

作者：黎汉生钟顺和王建伟肖秀芬天津大学化工学院天津300072

用等体积浸渍法制备了MoO3 SiO2 (MoSiO)表面复合氧化物负载的Cu Ni K2 O催化剂。利用IR ,TPR ,TPD以及微反技术研究了K2 O助剂对CO2 和CH3OH在Cu Ni MoSiO催化剂表面上吸附和合成DMC(碳酸二甲酯 )反应性能的影响。结果表明 :K2 O助剂... 详细信息

用等体积浸渍法制备了MoO3 SiO2 (MoSiO)表面复合氧化物负载的Cu Ni K2 O催化剂。利用IR ,TPR ,TPD以及微反技术研究了K2 O助剂对CO2 和CH3OH在Cu Ni MoSiO催化剂表面上吸附和合成DMC(碳酸二甲酯 )反应性能的影响。结果表明 :K2 O助剂的加入 ,使CO2 在催化剂表面吸附强度增加 ,当K2 O含量达Cu Ni总量的 15 %时 ,CO2 在催化剂表面上吸附后生成K2 CO3;CH3OH在催化剂表面上的解离吸附态 (CH3O- +H+ )的吸附强度减弱 ;CO2 和CH3OH在Cu Ni K2 O MoSiO催化剂表面反应主要产物为DMC ,H2 O ,CO和CH2 O。随着K2 O助剂的加入 ,反应转化率在 10 %之前增加 ,之后下降 ,DMC选择性稍有提高。副产物 (CO和CH2 O)的选择性下降。根据实验结果探讨了K2 O对催化剂表面活性中心的电荷分布的影响。

关键词： K2O 助剂二氧化碳甲醇碳酸二甲酯合成铜镍催化剂氧化钾氧化钼二氧化硅负载型催化剂吸附

Passive activity enhances residual control ability in patients with complete spinal cord injury

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Neural Regeneration Research 2025年第8期20卷 2337-2347页

作者： Yanqing Xiao Mingming Gao Zejia he Jia Zheng Hongming Bai Jia-sheng Rao Guiyun Song Wei Song Xiaoguang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Rehabilitation Evaluation China Rehabilitation Research CenterBeijingChina Cardiac Center Beijing Children’s HospitalCapital Medical UniversityBeijingChina The State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijingChina Department of Rehabilitation Engineering China Rehabilitation Science InstituteBeijingChina

Patients with complete spinal cord injury retain the potential for volitional muscle activity in muscles located below the spinal injury ***,because of prolonged inactivity,initial attempts to activate these muscles may not effectively engage any of the remaining neurons in the descending pathway.A previous study unexpectedly found that a brief clinical round of passive activity significantly increased volitional muscle activation,as measured by surface *** this study,we further explored the effect of passive activity on surface electromyographic signals during volitional control tasks among individuals with complete spinal cord *** patients with chronic complete thoracic spinal cord injury were *** electromyography data from eight major leg muscles were acquired and compared before and after the passive activity *** results indicated that the passive activity led to an increased number of activated volitional muscles and an increased frequency of *** the cumulative root mean square of surface electromyography amplitude for volitional control of movement showed a slight increase after passive activity,the difference was not statistically *** findings suggest that brief passive activity may enhance the ability to initiate volitional muscle activity during surface electromyography tasks and underscore the potential of passive activity for improving residual motor control among patients with motor complete spinal cord injury.

关键词： complete spinal cord injury cycle training epidural electrical stimulation motor training passive activity physiological state spinal cord circuit surface electromyography volitional control task

Group Buying of Competing Retailers with Fairness Concerns

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Journal of Systems Science and Systems Engineering 2020年第6期29卷 655-674页

作者： Na he zhong-zhong Jiang Minghe Sun Ying sheng School of Business Administration&Institute of Behavioral and Service Operations Management Northeastern UniversityShenyang 110167China bKey Laboratory of Data Analytics and Optimization for Smart Industry(Northeastern University) Ministry of EducationShenyang 110819China Department of Management Science and Statistics College of BusinessThe University of Texas at San AntonioSan Antonio TX 78249USA College of Sciences Northeastern UniversityShenyang 110819China

The fairness concern behavior is particularly common among members in supply chain *** downstream retailers often compare their profits with those of the other members in the supply chain,especially that of the supplier,and do not like the unfavorable distribution of the total *** work considers a supply chain consisting of a supplier and two competing retailers with fairness *** supplier offers a wholesale contract with quantity discount,and the two competing retailers have the options of individual purchasing and group *** a Stackelberg game model,the optimal decisions for the players are obtained for the group buying and the individual purchasing *** results indicate that the supplier benefits more than the retailers from the group buying *** particular,the group buying strategy gives the supplier a higher profit if the operational cost of group buying is below a ***,the fairness concern behavior of the retailers does not always hurt the profit of the ***,the supplier will benefit from the fairness concern behavior of the retailers in individual purchasing when the retailers operates in a relatively poor ***,market competition between the two fairness concerned retailers does not always benefit the *** competition between the fairness concerned retailers reduces the supplier's profit if the group buying strategy is used when the retailers operates in a relatively poor environment.

关键词： Group buying individual purchasing stackelberg game fairness concerns supply chain

多层螺旋CT二维(2D)及三维(MPR)在周围型肺癌的临床应用

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实用放射学杂志 2002年第9期18卷 761-762页

作者：刘国荣黄尧生钟兰生何志辉蓝博文程传虎惠州市中心人民医院放射科惠州市中心人民医院放射科广东惠州516001

目的　探讨多层螺旋CT二维 (2D)和多平面重建技术 (MPR)在周围型肺癌的临床应用价值。方法　 17例周围型肺癌行多层螺旋CT扫描 (层厚 1～ 2mm)和多平面重建。结果　 2D图可显示周围型肺癌内部结构、分叶征、毛刺征、病灶周围血管、胸膜... 详细信息

目的　探讨多层螺旋CT二维 (2D)和多平面重建技术 (MPR)在周围型肺癌的临床应用价值。方法　 17例周围型肺癌行多层螺旋CT扫描 (层厚 1～ 2mm)和多平面重建。结果　 2D图可显示周围型肺癌内部结构、分叶征、毛刺征、病灶周围血管、胸膜、纵隔结构的关系 ,但显示的范围、征象较局限。MPR可以多个方面显示肿块与胸膜、纵隔结构关系 ,MPR可多方面清楚显示肺癌本身征象和肺癌与周围组织的关系。结论　以 2D螺旋CT图为基础 ,结合MPR对诊断周围型肺癌有重要的临床应用价值

关键词：周围型肺癌断层摄影,X线计算机

早期乳腺癌保乳术后动态与静态调强放疗技术的剂量学对比分析

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广西医学 2020年第11期42卷 1377-1380,1393页

作者：钟胜河胡洪波黎建绪广西崇左市人民医院肿瘤科崇左市532200 广西医科大学附属肿瘤医院放疗科南宁市530021

目的比较早期乳腺癌保乳术后动态与静态调强放疗技术的剂量学差异。方法选取25例早期乳腺癌保乳术后患者,利用Eclipse 13.5计划系统分别为每位患者设计动态调强和静态调强治疗(6个不同子野强度水平),处方剂量均为50 Gy,常规分割照射(2 ... 详细信息

目的比较早期乳腺癌保乳术后动态与静态调强放疗技术的剂量学差异。方法选取25例早期乳腺癌保乳术后患者,利用Eclipse 13.5计划系统分别为每位患者设计动态调强和静态调强治疗(6个不同子野强度水平),处方剂量均为50 Gy,常规分割照射(2 Gy/次),5次/周。比较不同计划靶区的剂量分布、危及器官的受量情况,并比较加速器的机器跳数和治疗执行时间,评估不同技术的执行效率。结果(1)动态调强适形度、均匀度均优于静态调强(均P0.05)。(3)动态调强组患侧肺受照量、健侧肺、心脏、健侧乳的最大受照剂量均高于各静态调强组,但差异均无统计学意义(均P>0.05)。结论在对早期乳腺癌保乳术后患者的调强放疗过程中,动态调强计划与静态调强计划相比,能更好地满足靶区剂量要求,获得更好的靶区剂量分布,周围危及器官的受照量略高,但仍在可接受范围。

关键词：早期乳腺癌放射治疗静态调强动态调强剂量学保乳术

戴云山国家级自然保护区植物多样性评价与可持续发展策略研究

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武夷科学 2013年第1期29卷 6-15页

作者：薛凡刘金福兰思仁郑世群何中声福建农林大学林学院福建福州350002 福建农林大学海峡自然保护区研究中心福建福州350002

福建戴云山国家级自然保护区是福建省重要的生物多样性基因库、水源涵养区、生态安全屏障和珍稀野生动植物的生物安全岛屿,运用层次分析法对戴云山自然保护区植物多样性进行科学评价,针对评价结果并结合保护区生态、社会、经济现状,提... 详细信息

福建戴云山国家级自然保护区是福建省重要的生物多样性基因库、水源涵养区、生态安全屏障和珍稀野生动植物的生物安全岛屿,运用层次分析法对戴云山自然保护区植物多样性进行科学评价,针对评价结果并结合保护区生态、社会、经济现状,提出植物多样性可持续发展策略。

关键词：戴云山植物多样性层次分析法可持续发展

ε-Poly(L-lysine)-based Hydrogels with Fast-acting and Prolonged Antibacterial Activities

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Chinese Journal of Polymer Science 2018年第11期36卷 1239-1250页

作者： Yi-Jie Zou Shi-sheng he Jian-zhong Du Department of Orthopedics Shanghai Tenth People's Hospital Tongji University School of Medicine Department of Polymeric Materials School of Materials Science and Engineering Key Laboratory of Advanced Department Civil Engineering Materials of Ministry of Education Tongji University

Bacterial infections and the associated morbidity and mortality due to bacterial pathogens in wounds and medical implants have been increasing as most of current coatings cannot fulfill all the requirements including excellent intrinsically antibacterial activity, low cytotoxicity, and favorable physical properties. herein, we present a kind of antibacterial bydrogel based on e-poly（L-lysine）（EPL） grafted carboxymethyl chitosan （CMC-g-EPL） as the inherently antibacterial matrix and the surplus EPL as highly efficient antimicrobial agent. Such hydrogels possess tunable swelling abilities with water absorption percentages of 800%-2000% and modulus varying from 10 kPa to 100 kPa, and exhibit two-stage excellent antibacterial behavior. First, the free EPL can be released from the hydrogel network for quick and highly efficient bacteria killing with 99.99% of efficacy; second, the grafted EPL endows bydrogel matrix with prolonged intrinsically antibacterial activity, especially when most of free EPL is released from the hydrogel. Overall, we provide a new insight for preparing highly effective antibacterial hydrogels.

关键词： Chitosan Poly(L-lysine) Hydrogel Self-assembly Antibacterial efficacy