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light hybrid micro/nano-robots:From propulsion to functional signals

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Nano Research 2022年第6期15卷 5355-5375页

作者： Yuxin Gao ze xiong Jizhuang Wang Jinyao Tang Dan li College of Chemistry and Materials Science Jinan UniversityGuangzhou 510632ChinaGuangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China Department of Chemistry The University of Hong KongHong KongChina

Untethered motile micro/nanorobots(MNRs)that can operate in hard-to-reach small space and perform noninvasive tasks in cellular level hold bright future in healthcare,nanomanufacturing,biosensing,and environmental ***,as a flexible encoding method with tunable freedom of intensity,wavelength,polarization,and propagation direction,endows unique spatialtemporal precision and dexterity to the manipulation of ***,light has been extensively investigated as functional signals in bioimaging,phototherapy,as well as photoelectrochemical *** hybridization of light and other actuation method ushers in novel MNRs with broadened design space,improved controllability,and advanced *** this review,the fundamental mechanisms of light-driven MNRs will be *** top of it,light hybrid systems,coupling with magnetic,electric,chemical,or ultrasound field,will be reviewed,with light for propulsion or as functional *** rational hybridization of multiple stimulus in MNRs not only promises simple combination of two driving forces,but more importantly,motivates rethinking of light-driven MNRs for unprecedented applications.

关键词： micro/nanorobots micro/nanomotors multiple stimulus light-driven functional signals

Transcriptome approach to understand the potential mechanisms of resistant and susceptible alfalfa(Medicago sativa l.) cultivars in response to aphid feeding

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Journal of Integrative Agriculture 2018年第11期17卷 2518-2527页

作者： TU xiong-bing ZHAO Hai-long ZHANG ze-hua State Key laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences College of Plant Protection Shenyang Agricultural University

Plant breeding for resistance to agricultural pests is an essential element in the development of integrated crop management systems, however, the molecular and genetic mechanisms underlying resistance are poorly understood. In this pilot study, we conducted a transcriptomic analysis of a resistant （R） and susceptible （S） variety of alfalfa, with （＋A） or without （-A） aphids （totally four treatments）. We used the resistant cultivar Zhongmu t and the susceptible cultivar Soca. A total of 3 549 mRNAs were differentially expressed, of which 1 738 up-regulated and 1 307 down-regulated genes were identified in S＋A/S-A plants, while 543 up-regulated and 331 down-regulated genes were identified in the R＋A/R-A plants. KEGG analysis mapped 112 and 546 differentially expressed genes to 8 and 17 substantially enriched pathways for Zhongmu 1 and Soca, respectively. Six shared pathways were linked to plant resistance traits, including phenylpropanoid biosynthesis associated with salicylic acid synthesis, and linoleic acid metabolism associated with both jasmonic acid and flavonoid biosynthesis. Ultimately, we proposed a preliminary regulatory mechanism of alfalfa cultivar resistance response to aphids feeding based on transcriptome analyses and published documents.

关键词： alfalfa cultivar resistance aphids transcriptomic molecular mechanism

Effects of floral sexual investment and dichogamy on floral longevity

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Journal of Plant Ecology 2015年第2期8卷 116-121页

作者： Jie Gao Ying-ze xiong Shuang-Quan Huang State Key laboratory of Hybrid Rice College of Life SciencesWuhan UniversityNo.299 Bayi RoadWuchang DistrictWuhan 430072China School of life Sciences Central China Normal University152 Luoyu AvenueHongshan DistrictWuhan 430079China

Aims Floral longevity,the duration that a flower remains open and func-tional,varies greatly among *** in floral longevity has been considered to be optimal strategy for resource allocation under different ecological conditions,mainly determined by the rates of pollination and cost of flower ***,it is unclear whether an intrinsic factor,floral sexual investment,con-strains evolution of floral *** theoretical model also pre-dicts that dichogamy favors long-lived flowers,but empirical studies to test this prediction remain *** To examine the effect of floral sexual investment on floral longevity,we measured flower size together with pollen and ovule production in 37 sympatric flowering plants in a natural *** duration of the female and male phase in 21 protandrous species and floral longevity of the other 16 adichogamous species were documented in the *** Findings Floral longevity varied from 1 day to 15 days,while pollen num-ber per flower varied from 643 to 710880 and ovule number per flower from 1 to 426 in the 37 *** size was corre-lated with pollen production as well as ovule *** longevity was positively related to pollen production but not to ovule *** with the prediction that dichogamy favors long-lived flowers,we found the floral longevity of pro-tandrous species was significantly longer than that of adichoga-mous *** the protandrous species,pollen production per flower was observed to be positively related to male duration,while ovule production was not related to female *** analyses of variation in floral longevity and sexual investment among different species suggest that the floral sexual investment could be an intrinsic factor contributing to the selected floral longevity,particularly the male phase,and that high pollen pro-duction could potentially increase pollen removal,*** pro-ductive success.

关键词： floral longevity female phase duration male phase duration flower size floral sexual investment dichogamy

Theoretical Investigation of Exchange Bias in Compensated Cases

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Communications in Theoretical Physics 2008年第11期50卷 1241-1244页

作者： xiong Zhi-Jie WANG Huai-Yu DING ze-Jun Department of Physics University of Science and Technology of China Hefei 230026 China Department of Physics Tsinghua University Beijing 100084 China

The exchange bias （EB） of the ferromagnetic （FM）/antiferromagnetic （AFM） bilayers in a compensated case is studied by use of the many-body Green＇s function method of quantum statistical theory. The so-called compensated case is that there is no net magnetization on the AFM side of the interface. Our conclusion is that the EB in this case is primarily from the asymmetry of the interracial exchange coupling strengths between the FM and the two sublattices of the AFM. The effects of the layer thickness, temperature and the interracial coupling strength oi2 the exchange bias HE are investigated. The dependence of HE on the FM layer thickness and temperature is qualitatively in agreement with experimental results. HE is nearly inversely proportional to FM thickness. When temperature varies, both HE and He decrease with temperature increasing. The anisotropy of the FM layer only slightly influence He, but does not influence HE.

关键词： exchange bias coercivity compensated case Heisenberg Hamiltonian the many-body Green's function method

Phase transition and charge transport through a triple dot device beyond the Kondo regime

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Chinese Physics B 2018年第10期27卷 628-634页

作者： Yong-Chen xiong Zhan-Wu Zhu ze-Dong He School of Science and Advanced Functional Material and Photoelectric Technology Research InstitutionHubei University of Automotive TechnologyShiyan 442002China

Semiconductor quantum dot structure provides a promising basis for quantum information processing, within which to reveal the quantum phase and charge transport is one of the most important issues. In this paper, by means of the numerical renormalization group technique, we study the quantum phase transition and the charge transport for a parallel triple dot device in the strongly correlated limit, focusing on the effect of inter-dot hopping t beyond the Kondo regime. We find the quantum behaviors depend closely on the initial electron number on the dots, and the present model may map to single,double, and side-coupled impurity models in different parameter spaces. An orbital spin-1/2 Kondo effect between the conduction leads and the bonding orbital, and several magnetic-frustration phases are demonstrated when t is adjusted to different regimes. To understand these phenomena, a canonical transformation of the energy levels is given, and important physical quantities with respect to increasing t and necessary theoretical discussions are shown.

关键词： semiconductor quantum dot device parallel triple dot structure quantum phase transition charge transport strongly correlated effect

Mast fruiting in a hawkmoth- pollinated orchid Habenaria glaucifolia: an 8-year survey

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Journal of Plant Ecology 2015年第2期8卷 136-141页

作者： Ying-ze xiong Chang-Qiu liu Shuang-Quan Huang School of life Sciences Central China Normal University152 Luoyu AvenueHongshan DistrictWuhan 430079China Key laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of Sciences132 Lanhei RoadKunming 650204China

Aims The hypothesis of predator satiation has been proposed to explain mast fruiting in various flowering *** considers that the simultaneous production of large numbers of seeds by a plant population reduces the risk of seed predation for each *** produce huge numbers of seeds per fruit and rarely experience seed *** remains unclear which factors may affect fluctuating fruit production in orchids,which generally suffer a widespread pol-len *** explore the temporal pattern of fruiting and poten-tial factors related to fluctuation in fruit production,we investigated reproductive success of a long-spurred orchid(Habenaria glaucifo-lia)in an alpine meadow with thousands of individuals over 8 *** To estimate reproductive success,pollinator observation was con-ducted by day and at night,and pollinia removal and receipt were recorded in the field population for 8 *** examine whether fruit set and seed set are pollen limited,we conducted supple-mentary pollination experiments and compared fruit set,seed set and pollinia movement of open-pollinated flowers from 2011 to *** measured lengths of spurs and pollinator probos-cises,and nectar volume and concentration,to identify potential *** Findings Hawkmoths were seen to be effective pollinators for ***-folia in 3 years,whereas in the remaining 5 years no pollinators were observed,and consequently pollinia were rarely *** pollinia movements were observed in 2012,2013 and 2014(pollinia removal:48,59 and 85%;pollinia receipt 51,70 and 80%),and correspondingly fruit set was significantly higher in 2012 and 2013(59 and 46%)than in 2011(25%).it was fruit set,rather than seed set,that was pollen limited in this orchid in the 3 years,in that supplementary pollination increased fruit set but did not increase seed set per fruit compared to *** species of hawkmoths had proboscis lengths that matched the spur length of ***

关键词： Habenaria glaucifolia mast fruiting orchidaceae pollinator scarcity pollen limitation pollinia movement ‘sit and wait’strategy

Including predator presence in a refined model for assessing resistance of alfalfa cultivar to aphids

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Journal of Integrative Agriculture 2018年第2期17卷 397-405页

作者： TU xiong-bing FAN Yao-li Mark McNeill ZHANG ze-hua State Key laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences AgResearch

The aphid quantity ratio（AQR） is defined as the number of aphids on each cultivar divided by the number of aphids on all cultivars. AQR is based on the correlation between aphid populations and their host plants and is an important tool that has been util.zed in evaluating Medicago sativa（alfalfa） cultivar resistance to aphids. However, assessment of alfalfa resistance to aphids can be confused by the presence of aphid predators, causing the assessment of plant resistance to aphids to be based on incorrect aphid population data. To refine the AQR and account for the effect of predators on aphid population assessments, we introduced a parameter ‘α＇, corresponding to the predator quantity ratio, and used αAQR as the ratio to quantify aphid populations. Populations of both aphids（4 species） and their predators（12 species） occurring in 28 M. sativa cultivars were sampled over two years at a research station near Cangzhou, Hebei Province, China. Results showed that the most suitable evaluation period was from May to June, as the aphid population was stable during this period. Compared with the AQR method, the predator population numbers based on the αAQR had a significant inverse relationship with aphid population numbers and the 28 cultivars were clustered into three classes： the resistant class, tolerant class, and susceptible class. In addition, 17 cultivars were reassigned when evaluated using αAQR. All numerical values calculated by αAQR were displayed as a Gaussian distribution, which showed that the 28 cultivars could be clustered into nine groups using a median value（±SE） of 1±0.1. Hence, ongoing alfalfa breeding trials will be assessed using the αAQR to establish a robust system that includes agronomic performance parameters in order to general.ze the new method for further studies.

关键词： aphid quantity ratio(AQR) model alfalfa cultivar resistance to aphids natural enemy

Efficacy of ursodeoxycholic acid as an adjuvant treatment to prevent acute cellular rejection after liver transplantation: a meta-analysis of randomized controlled trials

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Hepatobiliary & Pancreatic Diseases International 2014年第5期13卷 464-473页

作者： Yi-lei Deng Xian-ze xiong Nan-Sheng Cheng Department of Biliary Surgery West China HospitalSichuan University

BACKGROUND： Acute cellular rejection（ACR） after liver transplantation（lT） is one of the most common problems faced by transplant recipients in spite of advances in immunosuppressive therapy. Recently, clinical trials reported that ursodeoxycholic acid（UDCA） reduced the incidence of ACR ***, others have shown contradictory conclusion. Therefore,we performed a meta-analysis of rigorous randomized controlled trials（RCTs） to determine the efficacy of UDCA in reducing ACR after *** SOURCES： All RCTs that evaluated efficacy of UDCA as an adjuvant treatment to prevent ACR after lT were searched from PubMed/MEDlINE, EMBASE, Cochrane Central Register of Controlled Trials, ScienceDirect databases and Web of Science（from January 1981 to March 2012）. There was no language limitation in these searches. Relevant abstracts of international meetings were also searched. References of each included study were searched ***： A total of 234 patients from four high-quality RCTs（Jadad score 4 to 5） were included in this *** use of UDCA did not decrease the incidence of ACR（RR： 0.94, 95% CI： 0.77-1.16, P0.05）, steroid-resistant rejection（RR： 0.77, 95% CI： 0.47-1.27, P0.05） and the number of patients with the multiple episodes of ACR（RR： 0.60, 95% CI：0.28-1.30, P0.05）. Different intervention programs（high-dose vs low-dose UDCA; early vs delayed UDCA treatment） also did not alter the ***： UDCA, as an adjuvant treatment, was not ableto prevent ACR and steroid-resistant rejection after lT. Further trials should be done to determine whether higher dose of UDCA will be beneficial.

关键词： ursodeoxycholic acid acute cellular rejection liver transplantation meta-analysis

Advances in 3D printing of magnetic materials:Fabrication,properties,and their applications

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Journal of Advanced Ceramics 2022年第5期11卷 665-701页

作者： Xiangxia WEI Ming-liang JIN Haiqiang YANG Xiao-xiong WANG Yun-ze lONG Zhangwei CHEN Institute for Future School of AutomationShandong Key Laboratory of Industrial Control TechnologyQingdao UniversityQingdao 266071China Collaborative Innovation Center for Nanomaterials&Devices College of PhysicsQingdao UniversityQingdao 266071China Additive Manufacturing Institute College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China

Magnetic materials are of increasing importance for many essential applications due to their unique magnetic ***,due to the limited fabrication ability,magnetic materials are restricted by simple geometric ***-dimensional(3D)printing is a highly versatile technique that can be util.zed for constructing magnetic *** shape flexibility of magnets unleashes opportunities for magnetic composites with reducing post-manufacturing costs,motivating the review on 3D printing of magnetic *** paper focuses on recent achievements of magnetic materials using 3D printing technologies,followed by the characterization of their magnetic properties,which are further enhanced by ***,the corresponding properties depend on the intrinsic nature of starting materials,3D printing processing parameters,and the optimized structural *** emphasis is placed on the functional applications of 3D-printed magnetic materials in different ***,the current challenges and future opportunities are also addressed.

关键词： three-dimensional(3D)printing hard magnets soft magnets magnetic properties applications