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Changes in lake area and water level in response to hydroclimate variations in the source area of the Yellow River:a case study from Lake Ngoring

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Frontiers of Earth Science 2023年第4期17卷 920-932页

作者： Yang PU Min ZHAN Xiaohua SHAO Josef PWERNE Philip AMEYERS jiaojiao yao Da ZHI School of Geographical Sciences Nanjing University of Information Science&TechnologyNanjing 210044China Department of Geology and Environmental Science University of PittsburghPittsburgh PA 15260USA Department of Earth and Environmental Sciences The University of MichiganAnn Arbor MI 48109USA

In the north-eastern Qinghai-Tibet Plateau(QTP),the source area of the Yellow River(SAYR)has been experiencing significant changes in climatic and environmental conditions in recent *** date,few studies have combined modern hydrological conditions with paleoclimate records to explore the mechanism(s)of these *** study seeks to improve understanding of hydrological variability on decadal and centennial timescales in the SAYR and to identify its general *** first determined annual fluctuations in the surface area of Lake Ngoring from 1985 to 2020 using multi-temporal Landsat *** results show that lake surface area changes were generally consistent with variations in precipitation,streamflow and the regional dry-wet index in the SAYR,suggesting that the water balance of the Lake Ngoring area is closely associated with regional hydroclimate *** records are also comparable to the stalagmite δ^(18)O monsoon record,as well fluctuations in the Southern Oscillation Index(SOI).Moreover,an association of high TSI(total solar insolation)anomalies and sunspot numbers with the expansion of Lake Ngoring surface area is observed,implying that solar activity is the key driving factor for hydrologic variability in the SAYR on a decadal *** this line of reasoning,we compared the δ^(13)C org-based lake level fluctuations of Lake Ngoring for the last millennium,as previously reported,with the hydroclimatic history and the reconstructed TSI *** conclude that the hydrological regime of Lake Ngoring has been mainly controlled by centennial fluctuations in precipitation for the last millennium,which is also dominated by solar *** general,it appears that solar activity has exerted a dominant influence on the hydrological regime of the SAYR on both decadal and centennial timescales,which is clearly manifested in the variations of lake area and water level of Lake Ngoring.

关键词： Qinghai-Tibet Plateau(QTP) source area of the Yellow River(SAYR) lake area/level Asian summer monsoon(ASM) El Nino-Southern Oscillation(ENSO) total solar insolation(TSI)

Protective layer for stable lithium-metal anodes at 60 mA·h/cm^(2) and 60 mA/cm^(2) with ion channel and inductive effect

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Journal of Materiomics 2024年第6期10卷 1252-1260页

作者： Xiao Zhang Zhiwei Chen jiaojiao Han Qiang Wang Jinshan Wang Juhua Luo Jianguang Xu Chi Chen Wei yao School of Materials Science and Engineering Jiangsu Provincial Key Laboratory of Eco-Environmental MaterialsYancheng Institute of TechnologyYancheng 224051China School of Materials and Energy Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials and Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021China

Contradiction between ultrafast nucleation and deposition rates of lithium(Li)crystals at high rate and heterogeneity of Li^(+)flux resulting from concentration polarization has compromised the performance of Li metal anodes especially at high areal capacity and current ***,multifunctional protective layer consisting of MoO_(3) nanobelt films(MoO_(3)-NF)is introduced on the surface of Li by a simple rolling *** strong binding energy between Li and MoO_(3) guides the homogeneous nucleation and deposition of Li,while the nanobelt networks provide effective ion channels for uniform distribution of the Li+*** of the novel multifunctional protective layer,the MoO_(3)-NF@Li anodes demonstrate a remarkable stability for 800 h with ultralow overpotential of 159 mV at extreme harsh conditions of 60 mA·h/cm^(2) and 60 mA/cm^(2).MoO_(3)-NF@Li||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2) full-cells can run 100 cycles with a superior capacity retention of 84.2%under practical test conditions,demonstrating great potential for high output and energy-density metal batteries.

关键词： Multifunctional protective layer Ion channel Inductive effect High areal capacity Li metal anodes

An organic-inorganic hybrid phase transition molecular material [(FC6H4CH2NH2CH3)2PbBr4] with intense fluorescent property

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An organic-inorganic hybrid phase transition molecular mater...

Pollution Characteristics and Ecological Impact of Screening Analysis of Fishing Port Sediments from Dalian,North China

2018年中西部地区无机化学化工学术研讨会

作者： jiaojiao yao Yanhuan Hao Zhenhong Wei Hu Cai College of Chemistry Nanchang University

Phase transition materials exhibit various physical properties due to external stimuli such as temperature,pressure,light,electric field,and magnetic ***,they are of great significance in applications such as dielectric devices,communications,sensors,and data ***,we synthesized a new two-dimensional layered organic-inorganic hybrid material[(FCHCHNHCH)PbBr]by reaction of3-fluoro-N-methylbenzylamine with PbBr in concentrated HBr aqueous *** title compound was confirmed by X-ray single crystal diffraction,infrared (IR) spectroscopy,powder X-ray diffraction (PXRD).The thermodynamic DSC analysis revealed it has a sharp large thermal hysteresis peak exhibiting a first-order type phase *** the fluorescent spectrum showed it has a strong emission peak at 438 nm when at an excitation wavelength of 267 nm.

关键词： Phase transition fluorescent organic-inorganic hybrid

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Environment & Health 2024年第10期2卷 702-711页

作者： Haichao Mu Xulin Hou Zilan Wu jiaojiao Li Wenwen Wang Meiling Lu Xing Liu Ziwei yao Key Laboratory for Ecological Environment in Coastal Areas Ministry of Ecology and EnvironmentNational Marine Environmental Monitoring CenterDalian 116023China School of Light Industry and Chemical Engineering Dalian Polytechnic UniversityDalian 116034China College of Marine Science and Environment Engineering Dalian Ocean UniversityDalian 116023China Agilent Technologies(China)Ltd. Inc.Beijing 100102China Laboratory for Ecological Environment in Coastal Areas Ministry of Ecology and EnvironmentNational Marine Environmental Monitoring CenterDalian 116023China

Environmental pollution from synthetic chemical mixtures has significant adverse impacts on marine ***,identifying the main constituents of chemical mixtures that pose ecological threats is challenging due to the necessity of an integrated workflow for comprehensive identification and toxicological prioritization of ***,an all-in-one mass spectrometric strategy integrating target,suspect,and nontarget analysis was used to investigate organic pollutants of concern in fishing port sediments,with 355 pollutants(32 from target analysis,118 from suspect screening and 205 from nontarget analysis)identified in 11 *** chemical classes of polycyclic aromatic hydrocarbons(PAHs),pesticides,and intermediates were the extensively detected chemical *** ecological risks of absolutely quantified pollutants(i.e.,16 parent PAHs,7 organophosphate esters(OPEs),10 pesticides and 4 benzotriazole ultraviolet absorbers)were assessed using toxicity-weighted concentration ranking,with o,p’-DDT being the major *** the toxicological priority index(ToxPi)framework,an extended ranking of all identified pollutants was achieved by combining instrument response and detection frequency,with a priority control list of 15 pollutants obtained,of which benzo[ghi]perylene(BghiP)and p,p’-DDE had the highest risk *** to frequent detection rates and significant environmental risks,routine monitoring of petroleum pollutants is considered *** study presents a general workflow that includes comprehensive identification and prioritization of pollutants,facilitating chemical management and ecological risk assessment.

关键词： fishing port sediments suspect screening nontarget analysis toxicity-weighted concentration ToxPi ecological risk assessment

聚偏氟乙烯/聚甲基丙烯酸甲酯复合材料性能的研究

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化工新型材料 2012年第1期40卷 105-107页

作者：姚娇娇王庭慰南京工业大学材料科学与工程学院南京210009

对PVDF/PMMA复合材料的力学性能和流动性进行了研究,对试样进行了加速老化实验,测试了试样的色差值。结果表明:PVDF和PMMA比例控制在75∶25时,力学性能较好;小分子助剂的添加起到分子内润滑剂的作用,能提高材料的熔融指数,提高流动性;... 详细信息

对PVDF/PMMA复合材料的力学性能和流动性进行了研究,对试样进行了加速老化实验,测试了试样的色差值。结果表明:PVDF和PMMA比例控制在75∶25时,力学性能较好;小分子助剂的添加起到分子内润滑剂的作用,能提高材料的熔融指数,提高流动性;随老化时间的增加,拉伸强度减小,色差值增大,且含GW770的试样色差值变化明显,老化6d就出现突变,之后变化平缓,所以后续不添加GW770。

关键词： PVDF PMMA 老化色差值

Antioxidant and Hypoglycemic Ability of Ardisia gigantifolia Stapf Parts

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Medicinal Plant 2024年第1期15卷 88-91页

作者： Chaohao GU Shihao LIANG Yuexuan WU Zhiren yao jiaojiao LI Kaimei ZHU Guilin Medical University Guilin 541000China Second Affiliated Hospital of Guilin Medical University Guilin 541000China

[Objectives]To study the antioxidant and hypoglycemic effects of different parts of Ardisia gigantifolia Stapf.[Methods]The hydroxyl radical scavenging activity,DPPH radical scavenging activity and total antioxidant capacity of ABTS of 75%ethanol extract of *** Stapf and the petroleum ether,ethyl acetate,n-butanol,chloroform and aqueous extract were measured with Vc as positive *** the same time,acarbose was used as reference substance to determine the inhibitory effect of each polar site onα-glucosidase.[Results]All parts of *** Stapf had antioxidant activity,among which ethyl acetate had the strongest antioxidant activity,and the scavenging rate of hydroxyl radical and DPPH radical was higher than that of positive *** results showed that petroleum ether,ethyl acetate and chloroform had a good inhibitory effect onα-glucosidase(better than acarbose).[Conclusions]The ethyl acetate part of *** Stapf had the best antioxidant activity and inhibitory effect onα-*** provides a basis for further research and development of *** Stapf.

关键词： Ardisia gigantifolia Stapf Antioxidants Free radicals Hypoglycemic effect

Layer-Valley Hall Effect under Inversion and Time-Reversal Symmetries

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Chinese Physics Letters 2024年第6期41卷 88-97页

作者：赵交交刘贵斌陈鹏姚裕贵张广宇杜罗军 Beijing National Laboratory for Condensed Matter Physics and Key Laboratory for Nanoscale Physics and DevicesInstitute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systems School of PhysicsBeijing Institute of TechnologyBeijing 100081China Schoolof Microelectronics Southern University of Science and TechnologyShenzhen 518055China Songshan Lake Materials Laboratory Dongguan 523808China

Hall effects have been the central paradigms in modern physics,materials science and practical applications,and have led to many exciting breakthroughs,including the discovery of topological Chern invariants and the revolution of metrological resistance *** date,the Hall effects have mainly focused on a single degree of freedom(Do F),and most of them require the breaking of spatial-inversion and/or time-reversal *** we demonstrate a new type of Hall effect,i.e.,layer-valley Hall effect,based on a combined layer-valley Do F characterized by the product of layer and valley *** layer-valley Hall effect has a quantum origin arising from the layer-valley contrasting Berry curvature,and can occur in nonmagnetic centrosymmetric crystals with both spatial-inversion and time-reversal symmetries,transcending the symmetry constraints of single Do F Hall effect based on the constituent layer or valley ***,the layer-valley Hall effect is highly tunable and shows a W-shaped pattern in response to the out-of-plane electric ***,we discuss the potential detection approaches and material-specific design principles of layer-valley Hall *** results demonstrate novel Hall physics and open up exotic paradigms for new research direction of layer-valleytronics that exploits the quantum nature of the coupled layer-valley DoF.

关键词： quantum Inversion curvature

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凝固型李子酸奶发酵条件优化

中国酿造 2019年第10期38卷 179-183页

作者：贺小贤姚娇娇周欣刘欢陕西科技大学食品与生物工程学院

以鲜牛乳和李子鲜果为主要原料,保加利亚乳杆菌(Lactobacillus bulgaricus)1028和嗜热链球菌(Streptococcus thermophilus)6032作为混合发酵剂,发酵制备凝固型李子酸奶。以酸度和感官评分为评价指标,在单因素试验的基础上,通过正交试验... 详细信息

以鲜牛乳和李子鲜果为主要原料,保加利亚乳杆菌(Lactobacillus bulgaricus)1028和嗜热链球菌(Streptococcus thermophilus)6032作为混合发酵剂,发酵制备凝固型李子酸奶。以酸度和感官评分为评价指标,在单因素试验的基础上,通过正交试验确定凝固型李子酸奶的最佳发酵条件,并对其理化指标及微生物指标进行检测分析。结果表明,凝固型李子酸奶的最优发酵条件为李子浆添加量40%,蔗糖添加量10%,发酵剂接种量4%,发酵温度42℃,发酵时间6 h。在此最优发酵条件下制得的凝固型李子酸奶酸度为85.4°T,感官评分为94分,质地细腻、酸甜可口,同时具备李子和酸奶的风味,其理化指标及微生物指标均符合相关国标要求。

关键词：李子凝固型酸奶发酵条件优化正交试验

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妊娠母猪膘情对其繁殖性能的影响

动物营养学报 2014年第6期26卷 1638-1643页

作者：姚姣姣田亮胡健颜培实南京农业大学动物科技学院南京210095

本研究旨在探讨妊娠期母猪膘情对窝产活仔数、初生窝重、胎盘效率和断奶窝重的影响。本试验以长白母猪为对象对98头经产母猪分娩前的背膘进行测定，根据背膘厚度分为厚（21~27 mm）、适中（16~20 mm）、薄（10~15 mm）3组。同时记录母... 详细信息

本研究旨在探讨妊娠期母猪膘情对窝产活仔数、初生窝重、胎盘效率和断奶窝重的影响。本试验以长白母猪为对象对98头经产母猪分娩前的背膘进行测定，根据背膘厚度分为厚（21~27 mm）、适中（16~20 mm）、薄（10~15 mm）3组。同时记录母猪分娩后窝产活仔数、初生窝重、胎盘重以及21 d仔猪断奶重。胎盘效率为初生窝重与胎盘重的比值。结果表明：背膘厚度适中组的窝产活仔数显著高于背膘厚度薄组和厚组（P0.05）。由此可知，妊娠期母猪膘情适中可改善窝产活仔数和初生窝重，所以通过营养调控改善过肥过瘦的不良体况尤为重要。

关键词：母猪膘情窝产活仔数初生窝重胎盘效率断奶窝重