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Sorption of 1-naphthol by plant cuticular fractions

Journal of Environmental Sciences 2007年第10期19卷 1214-1220页

作者： CHEN Bao-liang LI Yun-gui Department of Environmental Science Zhejiang University Hangzhou 310028 China

The contribution of aliphatic-rich plant biopolymer to sorption of hydrophobic organic compounds is significantly important because of their preservation and accumulation in the soil environment, but sorption mechanism is still not fully understood. In this study, sorption of 1-naphthol by plant cuticular fractions was examined to better understand the contributions of respective fraction. Toward this end, cuticular materials were isolated from the fruits of tomato by chemical method. The tomato cuticle sheet consisted of waxes （6.5 wt%）, cuticular monomer （69.5 wt%）, and polysaccharide （24.0 wt%）. Isotherms of 1-naphthol to the cuticular fractions were nonlinear （N value （0.82 - 0.90）） at the whole tested concentration ranges. The K∞/Kow ratios for bulk cuticle （TC1）, dewaxed cuticle （TC2）, cutin （TC4）, and desugared cuticle （TC5） were larger than unity, suggested that tomato bulk cuticle and cutin are much powerful sorption medium. Sorption capability of cutin （TC4） was 2.4 times higher than the nonsaponifiable fraction （TC3）. The 1-naphthol interactions with tomato cuticular materials were governed by both hydrophobic-type interactions and polar （H-bonding） interactions. Removal of the wax and polysaccharide materials from the bulk tomato cuticle caused a significant increase in the sorption ability of the cuticular material. There was a linear negative trend between K∞ values and the amount of polysaccharides or fraction＇s polarities （（N＋O）/C）; while a linear positive relationship between K∞ values and the content ofcutin monomer （linear R^2 = 0.993） was observed for present in the cuticular fractions. Predominant sorbent of the hydrophobic organic compounds （HOCs） in the plant cuticular fraction was the cutin monomer, contributing to 91.7% of the total sorption of tomato bulk cuticle.

关键词： plant cuticle 1-naphthol sorption cutin monomer

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A new forwarding address for next generation networks

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第1期13卷 1-10页

作者： A-qun ZHAO Man-gui liang School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China

The forwarding address plays an important role in constructing a communication network. In this paper, a new forwarding address suitable for next generation networks named the vector address （VA） is proposed which is different from the forwarding address coding methods of current networks. The characteristics of the VA are analyzed. Complex network theory and a theoretical analysis method are introduced to study the average address length of the VA when used to construct a global network Simulation experiments in a practical network topology model are carried out to validate the results. The results show that not only can the VA construct a simpler, more secure, and more scalable network, but it also can accommodate many more users than an Internet Protocol （IP） network with the same address length.

关键词： Next generation networks (NGN) Forwarding address Vector address (VA) Complex network

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A New Method for Increasing Output Power of a Three-Cavity Transit-Time Oscillator

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Chinese Physics Letters 2004年第7期21卷 1302-1305页

作者： HEJun-Tao ZHONGHui-Huang QIANBao-liang LIUYong-gui CollegeofScience NationalUniversityofDefenseTechnologyChangsha410073

We propose a new method to increase the output power of a three-cavity transit-time oscillator (TC-TTO). Conventional transit-time effect oscillators, such as the split-cavity oscillator (SCO), super-Reltron, and TC-TTO (or double-foil SCO), etc., have a common feature that the span of any modulating cavity is uniform. The new method is to vary the three-cavity spans from uniform to nonuniform. Its configuration is called the nonuniform three-cavity transit-time oscillator (NTC-TTO). Numerical simulations show that the electron-beam is modulated more deeply in certain NTC-TTOs than that in the TC-TTO with the same whole modulating length, and the output microwave power in certain NTC-TTOs is higher than that in the TC-TTO. The experimental results are in agreement with those of the numerical simulations. The results show that the new method can increase the output power of a microwave tube based on the TC-TTO.

关键词： Electronics and devices

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Spatiotemporal Characteristics of Typical Ecosystem Services and Their Spatial Responses to Driving Factors in Ecologically Fragile Areas in Upper Yellow River,China

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Chinese Geographical Science 2024年第4期34卷 674-688页

作者： liang gui FANG Fengman LIN Yuesheng ZHANG Zhiming School of Geography and Tourism Anhui Normal UniversityWuhu 241003China Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze Huaihe River Basin Anhui Normal UniversityWuhu 241003China

The identification of dominant driving factors for different ecosystem services(ESs)is crucial for ecological conservation and sustainable ***,the spatial heterogeneity of the dominant driving factors affecting various ESs has not been adequately elucidated,particularly in ecologically fragile *** study employed the integrated valuation of ESs and trade-offs(InVEST)model to evaluate four ESs,namely,water yield(WY),soil conservation(SC),habitat quality(HQ),and carbon storage(CS),and then to identify the dominant driving factors of spatiotemporal differentiation of ES and further to characterize the spatial heterogeneity characteristics of the dominant driving factors in the eco-fragile areas of the upper Yellow River,China from 2000 to *** results demonstrated that WY exhibited northeast-high and northwest-low patterns in the upper Yellow River region,while high values of SC and CS were distributed in central forested areas and a high value of HQ was distributed in vast grassland *** CS,WY,and SC exhibited decreasing trends over *** most critical factors affecting WY,SC,HQ,and CS were the actual evapotranspiration,precipitation,slope,and normalized difference vegetation index,*** addition,the effects of different factors on various ESs exhibited spatial *** results could provide spatial decision support for eco-protection and rehabilitation in ecologically fragile areas.

关键词： integrated valuation of ecosystem services and trade-offs(InVEST)model geographically weighted regression(GWR) natural factor spatial heterogeneity Lanxi urban agglomeration upper Yellow River China

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HOPF ALGEBRAIC APPROACH TO THE n LINEARLY RECURSIVE SEQUENCES

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Chinese Annals of Mathematics,Series B 1994年第2期15卷 141-146页

作者： liang gui(Institute of Mathematics, Fudan University, Shanghai 200433, China) FUDAN UNIV INST MATHSHANGHAI 200433PEOPLES R CHINA

It is proved that a linearly recursive sequence of n indices over field F (n≥1) is automatically a product of n linearly recursive sequences of 1-index over F by the theory of Hopf *** the way, the correspondence bet... 详细信息

关键词： Hopf algebra Linearly recursive sequence Recursive relation.

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Near-infrared light-driven multifunctional metal ion(Cu^(2+))-loaded polydopamine nanomotors for therapeutic angiogenesis in critical limb ischemia

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Nano Research 2023年第4期16卷 5108-5120页

作者： liang gui Juju Huang Yi Xing Yongjun Li Junjie Zou Yingwei Zhu Xiao liang Xiwei Zhang Qiang Xu Xin Du Department of Vascular Surgery The First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China Department of Gastroenterology The Affiliated Wuxi No.2 People’s Hospital of Nanjing Medical UniversityWuxi 214002China Beijing Key Laboratory for Bioengineering and Sensing Technology Department of Chemistry&Biological EngineeringUniversity of Science&TechnologyBeijing 100083China Department of Vascular Surgery Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical Science and Peking Union Medical CollegeBeijing 100730China Department of Anesthesiology The Affiliated Wuxi No.2 People’s Hospital of Nanjing Medical UniversityWuxi 214002China Department of Intervention Wujin Hospital Affiliated to Jiangsu UniversityWujin Clinical College of Xuzhou Medical UniversityChangzhou 213002China Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Xuzhou Medical UniversityXuzhou 221004China

Most of the current nanomedicine-based treatments for critical limb ischemia(CLI)only aim at promoting angiogenesis,ignoring the negative influence on the therapeutic effects caused by the complex pathological micro-environment of ischemic ***,near-infrared(NIR)light-driven metal ion(Cu^(2+))-loaded polydopamine(PDA)nanomotors(JMPN@Cu^(2+))is designed and *** to the good antioxidant and anti-inflammatory activities of PDA,JMPN@Cu^(2+)exhibits excellent biocompatibility and significantly improves the ischemic ***,based on superior photothermal conversion effect and jellyfish-like structure,the nanomotors are quickly propelled under NIR laser with low energy intensity to acquire the ability of movement and facilitate intracellular uptake of JMPN@Cu^(2+)by endothelial cells,resulting in the enhanced pro-angiogenic effect of Cu^(2+).Moreover,in vivo experimental findings show that JMPN@Cu^(2+)combined with NIR irradiation can successfully accelerate blood flow recovery and improve muscle *** these results together,this kind of nanomotor can promote angiogenesis along with ischemic micro-environment amelioration,holding great potential applications for the treatment of limb ischemia.

关键词： nanomotors polydopamine near-infrared(NIR)light copper therapeutic angiogenesis

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Permissible Minimum Thickness in Asymmetrical Cold Rolling

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Journal of Iron and Steel Research International 2013年第11期20卷 21-26页

作者： TANG De-lin LIU Xiang-hua LI Xiang-yu PENG liang-gui State Key Laboratory of Rolling and Automation Laboratory Northeastern University

The minimum rolling thickness in asymmetrical rolling was analyzed compared with that in symmetrical rolling. The differential equilibrium equations on forces were established to calculate the asymmetrical rolling force equation by slab method. An implicit expression of the minimum rolling thickness was then derived from the rolling force equation and Hitehcock equation. The results show that permissible minimum rolling thickness of asymmetrical rolling only exists within a specific range of cross-shear ratio, which is termed the cross-shear zone proportion of the whole de- formation zone. Numerical computation was carried out to obtain a discrete solution of the minimum rolling thick- ness. Experiments were designed to investigate the influence factors on cross-shear ratio. Finally, experimental re- sults prove the correctness of the improved formula given.

关键词： asymmetrical roiling minimum permissible thickness cross-shear ratio asymmetrical ratio friction peak value

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Escape Rate in the Bistable Sawtooth System Driven by Correlated Multiplicative and Additive White Noises

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Chinese Physics Letters 2001年第2期18卷 175-177页

作者： YOU Jing-Yun CAO Li WU Da-Jin liang gui-Yun State Key Laboratory of Laser Technology Huazhong University of Science and TechnologyWuhan 430074 CCAST(World Laboratory) P.O.Box 8730Beijing 100080 Department of Physics Huazhong University of Science and TechnologyWuhan 430074

We study the escape problem of a bistable sawtooth system driven by correlated multiplicative and additive white *** analytic representation of the relative escape rate is *** novel phenomena are found from the calculation result;“suppression platform”appears in the relative escape rate when the noise correlation coefficientλis ***,for small positive values ofλ,the relative escape rate exhibits“suppression platform”and then“resonant activation”with the increasing noise strength ratio R.

关键词： sawtooth noise activation

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Variation of carbon partitioning in newly expanded maize leaves and plant adaptive growth under extended darkness

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Journal of Integrative Agriculture 2021年第9期20卷 2360-2371页

作者： liang Xiao-gui SHEN Si GAO Zhen ZHANG Li ZHAO Xue ZHOU Shun-li College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193P.R.China School of Agricultural Sciences Jiangxi Agricultural UniversityNanchang 330045P.R.China Scientific Observation and Experimental Station of Crop High Efficient Use of Water in Wuqiao Ministry of Agriculture and Rural AffairsWuqiao 061802P.R.China Innovation Center of Agricultural Technology for Lowland Plain of Hebei Wuqiao 061802P.R.China

Plants must maintain a balance between their carbon(C)supply and utilization during the day–night cycle for continuous growth since C starvation often causes irreversible damage to crop *** is not well known how C fixation and allocation in the leaves of crops such as maize adapt to sudden environmental ***,to quantify primary C fixation and partitioning in photosynthetic maize leaves under extended darkness and to relate these factors to plant growth,maize seedlings were subjected to extended darkness(ED)for three successive days at the 6 th leaf fully expanded stage(V6).ED reduced plant growth and leaf chlorophyll levels but not the rate of net CO_2 *** a result of the reduction in photoassimilates,the accumulation of starch and total soluble carbohydrates(TSC)in mature leaves also decreased under ***,the percentage of the daily C fixation reserved in mature leaves *** transient C pools were largely composed of TSC and were mainly used for consumption by increased nocturnal respiration rather than for *** the days went on,both the amount of C accumulated and the percentage of the daily fixed C that was reserved in leaves decreased,which could be largely accounted for by the attenuated starch synthesis in all *** activities of ADPglucose pyrophosphorylase and soluble starch synthase decreased significantly over ***,this study concluded that both starch and TSC are involved in the coordination of the C supply and plant growth under a sudden C shortage but that they may be involved in different *** the ratio of reserved C to daily fixed C increased to maintain blade function under acute C starvation,both the amount and the proportion of C reserved in mature leaves decreased as plant growth continued in order to meet the growth demands of the plant.

关键词： maize starch total soluble carbohydrates carbon allocation extended darkness ongoing growth

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Synthesis and Properties of Poly(aryl ether ketone) Copolymers Containing 2,7-Naphthalene Moieties

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Chemical Research in Chinese Universities 2006年第1期22卷 114-117页

作者： LIU Si-jie NIU Ya-ming ZHU Xiao-liang WANG gui-bin JIANG Zhen-hua Alan G. MacDiarmid Institute College of Chemistry Jilin University Changchun 130012 P.R. China

Poly（ aryl ether ketone） copolymers containing 2,7-naphthylene and hydroquinone（HQ） moieties with various compositions were prepared by the reaction of 4,4＇-difluorobenzophenone（DFB） 2,7-naphthylene and hydroquinone in the presence of sodium carbonate and potassium carbonate （ 19： 1, mass ratio） in diphenyl sulfone （DPS）. The thermal analysis results of the copolymers show that the glass transition temperatures（Tgs） increase, while the melting temperatures（Tra） and tile 5.0% weight loss temperatures （ Td ） decrease with the increase of the 2,7-naphthalene moieties. For the copolymers synthesized at a molar fraction of 2,7-naphthalene in the difluoro monomers being over 0.30, no peaks corresponding to the cold crystallization temperature and the melting temperature could be detected, indicating that these copolymers are almost amorphous. The crystal structures of the copolymers with a molar fraction of 2,7-naphthalene being less than 0. 30 are rhombic.

关键词： Poly( aryl ether ketone) Naphthalene derivatives Friedel-crafts acylation

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