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低氮条件下超级杂交稻苗期根系特征的变化及与其高氮素积累的关系

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作物学报 2024年第2期50卷 414-424页

作者：吴宇刘磊崔克辉齐晓丽黄见良彭少兵作物遗传改良全国重点实验室/农业农村部长江中游作物生理生态与耕作重点实验室/华中农业大学植物科学技术学院湖北武汉430070

作物根系在氮素吸收与分配中起着重要作用。本研究选用2个根系特征具有差异的水稻品种黄华占(Huanghuazhan, HHZ,常规稻)和扬两优6号(Yangliangyou 6, YLY6,超级杂交稻),在水培条件和2个氮素浓度(低氮,lownitrogen,LN;高氮,highnitrogen... 详细信息

作物根系在氮素吸收与分配中起着重要作用。本研究选用2个根系特征具有差异的水稻品种黄华占(Huanghuazhan, HHZ,常规稻)和扬两优6号(Yangliangyou 6, YLY6,超级杂交稻),在水培条件和2个氮素浓度(低氮,lownitrogen,LN;高氮,highnitrogen,HN)处理下,研究根系形态和解剖结构特征的变化及其与LN下氮素积累的关系。与HN处理相比, LN处理下HHZ总氮积累量显著下降了19.7%, YLY6没有显著下降;YLY6根干重、总根长、根表面积、根尖数分别显著增加了41.3%、57.1%、74.9%和20.6%,而HHZ没有显著变化。与HN处理相比, LN处理下YLY6的根直径和根皮层面积分别显著增加了12.4%和24.2%,而HHZ根直径和根皮层面积、中柱直径分别显著降低了12.0%、21.9%和11.4%。LN处理下,YLY6根系铵转运蛋白基因AMT2;1、AMT2;3、AMT3;1、AMT3;2的表达量分别显著增加了195.6%、29.3%、314.9%和388.9%,谷氨酰胺合成酶基因GS1;1表达量增加了158.2%, HHZ中这5个基因的表达量没有显著变化。LN下总氮积累量与根系性状显著正相关(根厚壁组织厚度除外),与部分铵转运和同化相关基因的表达量显著正相关。这些结果表明超级杂交稻YLY6幼苗在LN下根系特征变化有利于增加氮积累。选育根系对减氮表现出有利变化的水稻品种应是绿色水稻生产的一个重要途径。

关键词：水稻低氮根系特征变化氮积累铵转运蛋白谷氨酰胺合成酶

Passivation Behavior of 2507 Super Duplex Stainless Steel in Hot Concentrated Seawater:Influence of Temperature and Seawater Concentration

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 326-340页

作者： Kang Zhao xiao-qi li li-Wei Wang qi-Rong Yang lian-Jun Cheng Zhong-Yu Cui College of Mechanical and Electrical Engineering Qingdao UniversityQingdao 266071China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

The electrochemical behavior and passivation properties of 2507 super duplex stainless steel(SDSS)in the hot concentrated seawater with different concentrations at different temperatures are characterized by electrochemical methods and X-ray photoelectron *** passive film formed on 2507 SDSS belongs to n-type semiconductor and mainly composed of hydroxides and oxides of Fe and Cr under all *** protectiveness of the passive film decreases with the increase in temperature mainly because of the increase in defect density in the passive *** corrosion resistance of 2507 decreases with the increase in seawater concentration,and the critical pitting temperature also decreases.

关键词： Stainless steel Hot concentrated seawater Passive film Pitting

1,25-dihydroxyvitamin D_3 regulates LPS-induced cytokine production and reduces mortality in rats

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World Journal of Gastroenterology 2008年第24期14卷 3897-3902页

作者： xiao-Ping qi Pei li Gang li Zhen Sun Jie-Shou li School of Medicine Nanjing University Department of GeneralSurgery Jinling Hospital 305 Zhongshandong Road Nanjing210002 Jiangsu Province China

AIM： To study the immunoregulatory effect of 1,25-dihydroxyvitamin-D3 Von dominant Thl response in rats. METHODS： Sixty adult Lewis rats were randomized into three groups. Rats in group 1 （n=25） were treated with 1,25-（OH）2D3 first and then challenged with LPS, rats in group 2 （n=25） were treated with vehicle first and then challenged with LPS. Ten animals in groups 1 and 2 were preserved for mortality observation. The remaining animals were injected （i.p） with endotoxin, 24 h after the last administration of 1,25-（OH）2D3 and vehicle. Rats in group 3 （n=10） were treated with 1,25-（OH）2D3 only. Serum IL-12, IFN-y, IL-2 and IL-4 levels were measured and target gene of 1,25-（OH）2D3 on Th cells was studied after 6 h. Gene abundance was verified by real-time quantitative PCR. RESULTS： No death occurred in rats pretreated with 1,25-（OH）2D3 after LPS injection. Death occurred 9 h after LPS injection in rats pretreated with the vehicle, and the number of deaths was 5 within 24 h, with a mortality rate of 50%. There was no change in the number of deaths within 96 h. Six hours after endotoxin stimulation, serum IL-12 and IFN-y levels decreased significantly in rats pretreated with 1,25-（OH）2D3 as compared with those in rats pretreated with the vehicle. The serum content of these two cytokines was very low in rats not challenged by endotoxin, and there was a significant difference as compared with the previous two groups. CONCLUSION： 1,25-（OH）2D3 attenuates injuryinduced by the lethal dose of 1PS, regulates Thl and Th2 cells at the transcription level, and dominantly responds to cytokine production in rats.

关键词： Endotoxin Cytokine 1,25-dihydroxy-vitamin-D3 Immunoregulation Mortality

Effects of congenital ptosis on the refractive development of eye and vision in children

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International Journal of Ophthalmology(English edition) 2020年第11期13卷 1788-1793页

作者： xiao-Yu Zeng Jia-Xing Wang xiao-li qi Xue-Han qian Nan Wei Tianjin Medical University Eye Institute Tianjin Medical University Eye HospitalCollege of Optometry and OphthalmologyTianjin Medical UniversityTianjin 300384China Department of Ophthalmology Emory University School of MedicineAtlantaGeorgia 30322USA

AIM:To investigate the influence of unilateral congenital ptosis on the development of the eye and vision in ***:In this prospective observational study,41 patients with unilateral congenital ptosis were enrolled(age range 3-15y).The blepharoptosis was divided into 3 subgroups according to the margin reflex distance-1(MRD-1),including mild group(MRD-1>2 mm),moderate group(0lindrical power(ptotic eyes:-0.86±0.79 D vs fellow eyes:-0.43±0.63 D,P=0.003)differed significantly between the ptotic eyes and the fellow *** spherical equivalent refraction(P=0.006),spherical power(P=0.01),cylindrical power(P=0.011),axial length-corneal radius(AL/CR)ratio(P=0.009),frequency of hyperopia(P=0.002)and astigmatism(P=0.004)were significantly different among the ptotic eye subgroups and the fellow eye *** addition,in patients with congenital ptosis,the incidence of amblyopia is 43.9%and the incidence of anisometropia is 24.4%.More importantly,the ratio of AL/CR showed significantly positive correlation with the severity of ptosis(P=0.002).CONCLUSION:Congenital ptosis may lead to a delayed eyeball development in the aspect of AL/*** risk of amblyopia is also increased due to visual deprivation and aggravated anisometropia,particularly in severe ptosis case.

关键词： unilateral congenital ptosis axial length AL/CR ratio amblyopia

原发皮肤CD30阳性间变性大细胞淋巴瘤临床病理观察

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诊断病理学杂志 2024年第8期31卷 790-792,813页

作者：武迪祁晓莉王春艳王哲哲卢晓红首都医科大学大兴教学医院病理科北京102600

目的探讨原发皮肤CD30阳性间变性大细胞淋巴瘤的临床病理特征、诊断、治疗及预后。方法分析1例反复发作的原发皮肤CD30阳性间变性大细胞淋巴瘤病例的临床病理特征,并文献复习。结果患者女性,54岁,5年间不同部位多次出现皮肤肿物,镜下真... 详细信息

目的探讨原发皮肤CD30阳性间变性大细胞淋巴瘤的临床病理特征、诊断、治疗及预后。方法分析1例反复发作的原发皮肤CD30阳性间变性大细胞淋巴瘤病例的临床病理特征,并文献复习。结果患者女性,54岁,5年间不同部位多次出现皮肤肿物,镜下真皮内见密集的肿瘤细胞弥漫浸润,并侵犯表皮,细胞有明显的多形性。免疫组化表达CD30、CD2、CD3、CD43。T细胞受体基因克隆性重排阳性,存在DUSP22缺失及DUSP22-POMZP3(intergenic)融合。结论原发皮肤CD30阳性间变性大细胞淋巴瘤少见,诊断主要依靠临床病史资料、组织学和免疫组化相结合。

关键词：临床病理特征原发皮肤间变性大细胞淋巴瘤基因重排

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Achieving high carrier mobility and low lattice thermal conductivity in GeTe-based alloys by cationic/anionic co-doping

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Rare Metals 2024年第6期43卷 2784-2795页

作者： xiao-qiang Wang xiao-Quan Hu Jun-Yan lin Chu-Bin li xiao-Tong Yu qi-Yong Chen li-li Xi qi-Shuo Yang Han li Ji-Ye Zhang Shuan-Kui li Kai Guo School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China Research Center for Advanced Information Materials(CAIM) Huangpu Research&Graduate School of Guangzhou UniversitySino-Singapore Guangzhou Knowledge CityGuangzhou510555China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Materials Genome Institute Shanghai UniversityShanghai 200444China School of Mechanical and Mining Engineering University of QueenslandBrisbaneQLD 4072Australia Key Laboratory of Si-Based Information Materials&Devices and Integrated Circuits Design Department of Education of Guangdong ProvinceGuangzhou 510006China

TheⅣ-Ⅵcompound GeTe is considered as a promising alternative to the toxic PbTe for high-efficiency mid-temperature thermoelectric ***,pristine GeTe suffers from a high concentration of Ge vacancies,resulting in an excessively high hole concentration(>1×10^(21)cm^(-3)),which greatly limits its thermoelectric *** address this issue,CuBiTe_(2)alloying is introduced to increase the formation energy of Ge vacancies in GeTe,thereby inhibiting the high carrier *** carrier scattering caused by the electronegativity difference between different elements is suppressed due to the similar electronegativity of Cu and Ge atoms.A relatively high hole mobility is obtained,which ultimately leads to a high power ***,by introducing Se as an alloying element at the anionic site in GeTe,dense point defects with mass/strainfield fluctuations are *** contributes to the strengthening of phonon scattering,thereby reducing the lattice thermal conductivity from 1.44 W·m^(-1)·K^(-1)for pristine GeTe to 0.28 W·m^(-1)·K^(-1)for Ge_(0.95)Cu_(0.05)Bi_(0.05)Te_(0.9)Se_(0.15)compound at 623 K.

关键词： GeTe Carrier mobility CuBiTe_(2)alloying Lattice thermal conductivity Thermoelectric properties

Potential Adverse Outcome Pathways of Chlorinated Organophosphate Flame Retardants

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China CDC weekly 2024年第23期6卷 542-546,I0008-I0011页

作者： Meiyu Zhou Huilin Zhang qi xiao Kexin li xiaoting li Haiyan Chu Department of Environmental Genomics Jiangsu Key Laboratory of Cancer BiomarkersPrevention and TreatmentCollaborative Innovation Center for Cancer Personalized MedicineSchool of Public HealthNanjing Medical UniversityNanjing CityJiangsu ProvinceChina Department of Genetic Toxicology The Key Laboratory of Modern Toxicology of Ministry of EducationCenter of Global HealthSchool of Public HealthNanjing Medical UniversityNanjing CityJiangsu ProvinceChina Department of Nutrition and Food Safety School of Public HealthNanjing Medical UniversityNanjing CityJiangsu ProvinceChina

What is already known about this topic?Chlorinated organophosphate flame retardants(Cl-OPFRs)are frequently detected chemicals in the environment and biological samples,yet there is a lack of systematic evaluation regarding the adverse effects and toxicological mechanisms of *** is added by this report?This study utilizes the adverse outcome pathway(AOP)framework to assess the health implications and mechanisms of Cl-OPFRs,identifying multi-system toxicity,with a particular emphasis on reproductive issues and the possible toxic *** are the implications for public health practice?These results enhance knowledge of the health hazards linked to Cl-OPFRs,supporting the creation of focused risk evaluations and suitable regulatory actions.

关键词： utilize supporting Chlorin

Intrinsically asymmetric atomic character regulates piezoelectricity in two-dimensional materials

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Frontiers of physics 2024年第3期19卷 153-162页

作者： Yun-qin li qi-Wen He Dai-Song Tang xiao Shang xiao-Chun Wang School of Physics Science and Information Technology Liaocheng UniversityLiaocheng 252000China Key Laboratory of Polar Materials and Devices Ministry of EducationDepartment of ElectronicsEast China Normal UniversityShanghai 200241China Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China

Decreasing of layer thickness causes the decrease of polarization until it disappears due to the existence of depolarization ***,the search for strong piezoelectric materials is highly desirable for multifunctional ultra-thin piezoelectric ***,we propose a common strategy for achieving strong piezoelectric materials through the electronic asymmetry induced by the intrinsically asymmetric atomic character of different chalcogen ***,in the tetrahedral lattice structures,for example,M4X3Y3(M=Pd/Ni,X/Y=S,Se or Te,X≠Y)monolayers are proved to display excellent out-of-plane ***4Se3Te3 possesses the largest piezoelectric coefficient d33 of 61.57 pm/V,which is much larger than that of most 2D *** the electronic asymmetry further increases the out-of-plane piezoelectricity of Janus M4X3Y3 ***,the out-of-plane piezoelectricity is positively correlated with the ratio of electronegativity difference(Red)and the electric dipole moment(P).This work provides alternative materials for energy harvesting nano-devices or self-energized wearable devices,and supplies a valuable guideline for predicting 2D materials with strong out-of-plane piezoelectricity.

关键词： piezoelectricity intrinsically asymmetric atomic character ratio of electronegativity difference electric dipole moment first-principles calculations

Process Analysis of Double Circuit Transmission line Trip-out on the Same Tower Due to lightning

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高压电器 2011年第9期47卷 31-36,43页

作者： DUAN Da-peng REN Zhi-gang WANG Peng YE Kuan CHANG xiao-qi li Wei Beijing Electric Power Research Institute Beijing 100075 China

In recent years,several failures of double circuit transmission line on the same tower due to lightning were happened in Beijing power *** it can be reclosed successful,the lightning strike caused a grave threat to the power grid *** cause of the accident and the accident process were studied for the sake of further understanding of the impact of lightning on power *** an example,110 kV double circuit transmission line(Xilong-line) was *** first,the system topology was *** the analysis on relay protection actions and the fault recorder data,over voltage on the insulator strings was *** on the analysis and the calculation,accident cause and the process were presented ***,it comes to the conclusion that the lightning failure was caused by *** wave of the lightning over voltage would spread to the not grounded neutral point of the transformers,and make the neutral protective gap breakdown,then cause freewheeling with the frequency of 50 *** results of the relay protection,the double circuit transmission line all tripped ***,the causes of the accident were proposed that included terrain features,large corner towers,strong thunderstorm weather and poor grounded contact of the tower.

关键词： double circuit transmission lines on the same tower lightning trip-out at the same time fault recorder over-voltage calculation lightning protection