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Self-assembly of perovskite nanocrystals:From driving forces to applications

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Journal of Energy Chemistry 2024年第1期88卷 561-578,I0013页

作者： yi Li Fei zhang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China

Self-assembly of metal halide perovskite nanocrystals(NCs)into superlattices can exhibit unique collective properties,which have significant application values in the display,detector,and solar cell *** review discusses the driving forces behind the self-assembly process of perovskite NCs,and the commonly used self-assembly methods and different self-assembly structures are ***,we summarize the collective optoelectronic properties and application areas of perovskite superlattice ***,we conclude with an outlook on the potential issues and future challenges in developing perovskite NCs.

关键词： Self-assembly Metal halide perovskite Nanocrystals Driving forces

Numerical Study of the High-Frequency Wave Loads and Ringing Response of A Bottom-Hinged Vertical Cylinder in Focused Waves

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China Ocean Engineering 2020年第4期34卷 513-525页

作者： zhang yi TENG Bin State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

This paper presents a numerical study on the high-frequency wave loads and ringing response of offshore wind turbine foundations exposed to moderately steep transient water *** wave groups are generated by the technique of frequency-focusing,and the numerical simulation of focused waves is based on the NewWave model and a Fourier time-stepping *** proposed model is validated by comparison with the published laboratory *** respect of both the wave elevations and the underlying water particle kinematics,the numerical results are in excellent agreement with the experimental ***,the local evolution of power spectra and the transfer of energy into higher frequencies can be clearly *** the generalized FNV theory and Rainey’s model are applied respectively to calculate the nonlinear wave loads on a bottom-hinged vertical cylinder in focused *** ringing response excited by the nonlinear high-frequency wave loads is found in the numerical simulation when frequency ratios(natural frequency of the structure to peak frequency of wave spectra)are equal to 3–*** amplification factor of ringing response is also investigated for different dynamic properties(natural frequency and damping ratio)of the structure.

关键词： high-frequency wave loads ringing response focused wave vertical cylinder

On thermodynamical evolution of Kerr black holes in active galactic nuclei

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Chinese Science Bulletin 1998年第2期43卷 104-107页

作者： Yongjian zhang Yaoquan chu Univ Sci & Technol China Ctr Astrophys Hefei 230026 Peoples R China

The effect of Blandford_Znajek process on the thermodynamical evolution of Kerr black holes in active galactic nuclei is discussed. It is demonstrated that a black hole does not evolve into an extreme Kerr state provi... 详细信息

关键词： black hole thermodynamical evolution Blandford_Znajek effect.

Geographic variation in the yield formation of single-season high-yielding hybrid rice in southern China

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Journal of Integrative Agriculture 2021年第2期20卷 438-449页

作者： WANG Dan-ying LI Xu-yi YE Chang XU chun-mei CHEN Song chu Guang zhang Yun-bo zhang Xiu-fu State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006P.R.China Crop Research Institute Sichuan Academy of Agricultural SciencesChengdu 610066P.R.China Hubei Collaborative Innovation Center for Grain Industry Yangtze UniversityJingzhou 434025P.R.China

Environmental conditions greatly affect the growth of rice. To investigate the geographic differences in yield formation of single-season high-yielding hybrid rice in southern China, experiments were conducted in 2017 and 2018 in the upper and middle–lower reaches of the Yangtze River with 10–30 main locally planted high-yielding hybrid cultivars used as materials. Compared with rice planted in the middle–lower reaches of the Yangtze River, rice planted in the upper reaches has a longer tillering duration, higher accumulated temperature(≥10℃) during tillering period, but lower accumulated temperature and solar radiation from initial booting to maturity. yield traits comparison between the upper and the middle–lower reaches of Yangtze River showed that the former had 48.1% more panicles per unit area while the latter had 46.4% more grains per panicle;the rice yield in the former was positively correlated with the seed setting rate and the dry matter accumulation before heading, while the latter was positively correlated with grains per panicle and dry matter accumulation from booting to maturity. Comparison of the same variety Tianyouhuazhan planted in different regions showed there was a significant positive correlation between panicle number and the duration of and accumulated temperature during the tillering period(r=0.982^(**), r=0.993^(**), respectively), and between grains per panicle and accumulated solar radiation during booting period(r=0.952~*). In the upper reaches of the Yangtze River, more than 90% of cultivars with an yield of greater than 11 t ha^(–1) had an effective panicle number of 250–340 m^(–2), and there was a significant negative correlation between seed setting rate and grains per panicle;therefore, the high-yielding rice production in these regions with a long effective tillering period(>40 d) should choose varieties with moderate grains per panicle, adopt crop managements such as good fertilizer and water measures during vegetative growth pe

关键词： single-season hybrid rice geographic variation yield climatic factor southern China

Symmetries and Two Types of Non-Noether Conservation Laws of Birkhoffian System with Unilateral Constraints

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Communications in Theoretical Physics 2006年第2期45卷 239-244页

作者： zhang yi Department of Civil Engineering University of Science and Technology of Suzhou Suzhou 215011 China

The symmetries and non-Noether conservation laws of Birkhoffian system with unilateral constraints are studied. The differential equations of motion of the system are established, and the criterions of Noether symmetry, Lie symmetry and Mei symmetry of the system are given. Two types of new conservation laws, called the Hojman conservation law and the Mei conservation law respectively, are obtained, and the intrinsic relations among the symmetries and the new conservation laws are researched. At the end of the paper, an example is given to illustrate the application of the results.

关键词： analytical mechanics unilateral constraint Birkhoffian system symmetry conservation law

Effect of Aspect on Climate Variation in Mountain Ranges of Shennongjia Massif, Central China

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Chinese Geographical Science 2018年第1期28卷 74-85页

作者： zhang yi School of Earth Sciences China University of Geosciences The College of Urban & Environmental Sciences Central China Normal University

The aim of this study was to better understand the mechanisms of regional climate variation in mountain ranges with contrasting aspects as mediated by changes in global climate. It may help predict trends of vegetation variations in native ecosystems in natural reserves. As measures of climate response, temperature and precipitation data from the north, east, and south-facing mountain ranges of Shennongjia Massif in the coldest and hottest months(January and July), different seasons(spring, summer, autumn, and winter) and each year were analyzed from a long-term dataset(1960 to 2003) to tested variations characteristics, temporal and spatial quantitative relationships of climates. The results showed that the average seasonal temperatures and precipitation in the north, east, and south aspects of the mountain ranges changed at different rates. The average seasonal temperatures change rate ranges in the north, east, and south-facing mountain ranges were from –0.0210℃/yr to 0.0143℃/yr, –0.0166℃/yr to 0.0311℃/yr, and –0.0290 ℃/yr to 0.0084℃/yr, respectively, and seasonal precipitation variation magnitude were from –1.4940 mm/yr to 0.6217 mm/yr, –1.6833 mm/yr to 2.6182 mm/yr, and –0.8567 mm/yr to 1.4077 mm/yr, respectively. The climates variation trend among the three mountain ranges were different in magnitude and direction, showing a complicated change of the climates in mountain ranges and some inconsistency with general trends in global climate change. The climate variations were significantly different and positively correlated cross mountain ranges, revealing that aspects significantly affected on climate variations and these variations resulted from a larger air circulation system, which were sensitive to global climate change. We conclude that location and terrain of aspect are the main factors affecting differences in climate variation among the mountain ranges with contrasting aspects.

关键词： regional climate variation slope aspect Shennongjia Massif One-way ANOVA global climate change

Movement of ACC oxidase 3 mRNA from seeds to flesh promotes fruit ripening in apple

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Molecular Plant 2024年第8期17卷 1221-1235页

作者： Ting Wang yi Zheng Chen Xu Yulin Deng Xinyi Hao Zicheng chu Ji Tian yi Wang Xinzhong zhang Zhenhai Han Ting Wu College of Horticulture China Agricultural UniversityBeijingChina Plant Science and Technology College Bioinformatics CenterBeijing University of AgricultureBeijingChina

Xenia,the phenomenon in which the pollen genotype directly affects the phenotypic characteristics of maternal tissues(i.e.,fruit ripening),has applications in crop production and ***,the underlying molecular mechanism has yet to be ***,we investigated whether mobile mRNAs from the pollen affect the ripening and quality-related characteristics of the fruit using cross-pollination between distinct Malus domestica(apple)*** demonstrated that hundreds of mobile mRNAs originating fromthe seeds are deliveredto *** themovementof one of these mRNAs,AcC oxidase 3(MdAco3),is coordinated with fruit *** acid treatment,which can cause plasmodesmal closure,blocks MdAcO3 movement,indicating that MdAcO3 transcripts may move through the *** assess the role of mobile MdAcO3 transcripts in apple fruit,we created MdACO3-GFP-expressing apple seeds using MdACO3-GFP-overexpressing pollen for pollination and showed that MdACO3 transcripts in the transgenic seeds move to the flesh,where they promote fruit ***,we demonstrated that MdAco3 can be transported from the seeds to fruit in the fleshy-fruited species tomato and *** results underscore the potential of mobile mRNAs from seeds to influence fruit characteristics,providing an explanation for the xenia ***,our findings highlight the feasibility of leveraging diverse pollen genomic resources,without resorting to genome editing,to improve fruitquality.

关键词： fruit ripening xenia ACO3 mobile RNA seed(to flesh)

Effects of Dietary Net Energy Density and Standardized Ileal Digestible Lysine: Net Energy Ratio on the Performance and Carcass Characteristic of Growing-Finishing Pigs Fed Low Crude Protein Supplemented with Crystalline Amino Acids Diets

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Agricultural Sciences in China 2011年第4期10卷 602-610页

作者： zhang Gui-jie yi Xue-wu chu Li-cui LU Ning Htoo John QIAO Shi-yan State Key Laboratory on Animal Nutrition College of Animal Science and Technology China Agricultural University Beijing 100193 P. R. China Evonik Degussa GmbH Rodenbacher Chaussee 4 Hanau 63457 Germany

Two 3×3 factorial design trials with 1 080 of Yorkshire×Landrace×Duroc barrows were conducted to investigate the effects of dietary net energy （NE） density and standardized ileal digestible （SID） lysine：NE ratio on the performance of growing- finishing pigs and carcass characteristic of finishing pigs fed low crude protein （CP） supplemented with crystalline amino acids （CAA） diets. Low CP corn-soybean meal basal diets （14% for Exp. 1 and 11% for Exp. 2） supplemented with crystalline lysine, methionine, threonine, and tryptophan were formulated. Nine treatments with increasing NE density and SID lysine：NE ratio were used in each trial （Exp. 1： 9.66, 9.87, and 10.08 MJ kg-1 NE, 0.89, 0.96, and 1.03 g MJ-1 SID lysine： NE; Exp. 2： 9.83, 10.04, and 10.25 MJ kg-1 NE, 0.69, 0.76, and 0.83 g MJ-1 SID lysine：NE）. In Exp. 1, we observed that the average daily gain （ADG） for barrows that received the diet containing 9.87 MJ kg-1 NE was significantly higher than that of barrows fed a 9.66 MJ kg-1 NE diet （P0.05）, but no difference was observed when compared with barrows that received a diet containing 10.08 MJ kg-1 NE （P0.05）. The ADG was affected both linearly （P0.05） and quadratically （P0.05） as the SID lysine：NE ratio increased. The NE density or SID lysine：NE ratio and their interaction had no effect on the average daily feed intake （ADFI） and serum urea nitrogen （SUN）（P0.05）. The feed to gain ratio （F：G） decreased （linearly, P0.05; quadratically, P0.05） as the NE density or SID lysine：NE ratio increased, but no interaction of NE density and SID lysine： NE ratio on the F：G. In Exp. 2, the dietary NE density both linearly （P0.05） and quadratically （P0.05） affected the ADG and F：G. Barrows that received a diet containing 10.04 MJ kg-1 NE had a greater ADG （P0.05） than barrows that received a 9.83 MJ kg-1 diet, but there was no difference （P0.05） as compared with barrows that received a diet containing 10.25 MJ kg-1 NE. F：G was significantly higher （P0.05） for barrows that re

关键词： pig lysine net energy growth performance carcass characteristic

MiR-140 downregulates fatty acid synthesis by targeting transforming growth factor alpha(TGFA)in bovine mammary epithelial cells

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Journal of Integrative Agriculture 2022年第10期21卷 3004-3016页

作者： chu Shuang-feng ZHAO Tian-qi Abdelaziz Adam Idriss ARBAB YANG yi CHEN Zhi YANG zhang-ping College of Animal Science and Technology Yangzhou UniversityYangzhou 225009P.R.China Joint International Research Laboratory of Agriculture&Agri-Product Safety Yangzhou UniversityYangzhou 225009P.R.China Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses College of Veterinary MedicineYangzhou UniversityYangzhou 225009P.R.China

Fat is an indispensable nutrient and basic metabolite for sustaining life,and milk is particularly rich in fatty acids,including a variety of saturated and unsaturated fatty ***(miRNA)and mRNA play an important role in the regulation of milk fat metabolism in mammary gland *** has been shown that lipid metabolism has a complex transcriptional regulation,but the mechanism by which milk fat synthesis is regulated through miRNA–mRNA interactions is poorly *** this study,we performed transcriptome sequencing with bovine mammary gland tissue in the late lactation(270 and 315 days after parturition)to identify the key gene that regulating milk fat metabolism.A total of 1207 differentially coexpressed genes were selected,828 upregulated genes and 379 downregulated genes were *** transforming growth factor alpha(TGFA)gene was selected as the target gene,and luciferase reporter assay,Western blotting and q RT-PCR were used for further *** results demonstrated that miR-140 was an upstream regulator of TGFA,and miR-140 could inhibit(P<0.01)unsaturated fatty acid and triglyceride(TAGs)production in bovine mammary epithelial cells(BMECs).In contrast,TGFA promoted(P<0.01)unsaturated fatty acid and TAG *** experiments further indicated the mi R-140/TGFA regulatory *** together,these results suggest that the mi R-140/TGFA pathway can inhibit(P<0.01)milk fat metabolism and improve milk quality by genetic means.

关键词： bovine mammary epithelial cells TGFA transcriptome sequencing miR-140 fatty acid metabolism