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珠穆朗玛峰北坡桤木属大气花粉传输路径与来源

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地球科学进展 2024年第4期39卷 419-428页

作者：程久菊吕新苗朱立平马庆峰 HUMAGAIN SIMA PAUDAYAl N KHUM 中国科学院青藏高原研究所青藏高原地球系统与资源环境全国重点实验室北京100101 中国科学院大学北京100049 Central Department of Geology Tribhuvan UniversityKathmandu 44600Nepal

认识区域大气花粉组成及其形成条件有利于明确不同类型花粉组合的气候与环境意义。利用布卡大气花粉采样器在珠穆朗玛峰北坡开展了连续2年(2012—2013年)的大气花粉观测研究。基于后向轨迹和潜在来源区域模型,探讨了秋季主要组分桤木属... 详细信息

认识区域大气花粉组成及其形成条件有利于明确不同类型花粉组合的气候与环境意义。利用布卡大气花粉采样器在珠穆朗玛峰北坡开展了连续2年(2012—2013年)的大气花粉观测研究。基于后向轨迹和潜在来源区域模型,探讨了秋季主要组分桤木属花粉的传输路径与潜在来源区域,分析了桤木属花粉与其植物分布和大气环流的关系及气候指示意义。结果显示:(1)桤木属花粉季气团传输路径主要来自于采样点西南方向;(2)桤木属花粉潜在来源区域与其气团传输路径基本一致,主要是喜马拉雅山脉中段,包括尼泊尔中部和东部以及西藏南部等地区;(3)桤木属花粉数量、传输路径和来源区域的年际变化与大气环流有关,受高空西风影响的西南气团对桤木属花粉影响更大。研究结果可以为认识珠穆朗玛峰北坡外来花粉的气候意义提供科学依据。

关键词：桤木属花粉传输路径来源区域后向轨迹模拟青藏高原

Evaluation and salivary biochemistry associations of sour-salty taste interaction

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Journal of Future Foods 2024年第4期4卷 376-382页

作者： Hongnan Jiang Ye Chen Jianshe Chen louise Dye xinmiao Wang laboratory of Food Oral Processing School of Food Science and BiotechnologyZhejiang Gongshang UniversityHangzhou 310018China Zhejiang-UK Joint laboratory of Food Sensory Science Zhejiang Gongshang UniversityHangzhou 310018China School of Food Science and Nutrition University of LeedsLeeds LS29JTUK

Taste interaction is a well-known phenomenon in sensory stodies,but how to quantify the magnitode of the effect of one tastant on other taste attribute(s)is still largely unsolved,let alone further explorations from a salivary biochemistry perspective.Upon acquiring the individual taste threshold and evaluating the just noticeable difference(JND).this stody firstly established a quantitative method to assess the magnitude of taste interaction in a binary taste mixture by evaluating the concentration difference upon psychologically-comparable stimulation.The change of salty taste intensity(CSI)was therefore defined as the subtraction of JND using sour-salty taste stimulant from JND using pure salty taste stimulant,with a dimension of concentration in mmol/l.CSI was then used to demonstrate how citric acid affected salty taste perception in a salty-sour binary taste mixture in 16 young and healthy participants.Concentrations of citric acid used in the binary taste mixtore were 0.***.0.09.0.***.0.24 and 0.40 mmoll,respectively.and results showed that salty taste perception was enhanced(average CSI of 0.93 mmoll)when the citric acid concentration was low(at 0.05 and 0.09 mmoll).but with an increasing concentration of citric acid ranging from 0.14 to 0.40 mmol/l,this effect gradually turned from enhancement to suppression of salty taste perception(correspondingly a continoously decreasing CSI all the way down to an average of-2.94 mumol/l).It was also found that cystatin SN concentration in participants'unstimulated saliva samples was significantly negatively correlated with salty taste threshold(with and without the presence of citric acid),and it was one of the most significant factors affecting CSI,s shown in multiple regression analysis.Carbonic anhydrase VI concentration in participants'unstimulated saliva sanples was also found to be significantly negatively correlated with salty taste recognition(with and without presence of citric acid).but it did not pose significant effect on CSI.From these results,this study

关键词： Taste interaction evaluation Sensory analysis Salty taste perception Salivay biochemical components

Pollen indication to source plants in the eastern desert of China

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Chinese Science Bulletin 2005年第15期50卷 1632-1641页

作者： lI Yuecong XU Qinghai ZHAO Yinclkui YANG Xiaolan XIAO Jule CHEN Hui lü xinmiao Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029 China College of Resources and Environment Hebei Normal UniversityShijiazhuang 050016 China Department of Environmental Management University of Central Lancashire Preston UN Hebei Geography Institute Hebei Academy of Sciences Shijiazhuang 050011 China Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

In order to investigate the indication of major pollen types to source plants, 39 surface pollen samples are collected from 39 plant communities. The results show that diversity of pollen assemblages presents in different commu-nities. Chenopodiaceae pollen percentages are highest in Kalidium communities and Ceratoides communities (higher than 45%, average is 63.4%), but high Ephedra pollen per-centages (higher than 3.3%, average is 16.5%)in Ceratoides communities make it distinguished from Kalidium communi-ties. Artemisia pollen percentages (more than 50%) are much higher than Chenopodiaceae (less than 35%) in Artemisia Communities. Nitraria pollen percentages (higher than 2%, average is 13.6%) are highest in Nitraria communities com-pared with those in other community patterns. Tamariceae pollen percentages (higher than 2%, average is 8.6%) are highest both in Tetraena and Reaumuria communities com-pared with those in other community patterns. But in Reau-muria communities, Artemisia pollen percentages are higher than Chenopodiaceae with some other pollen types such as Gramineae, Compositae, leguminosae; on the contrary, in Tetraena communities, Artemisia pollen percentages are less than Chenopodiaceae with few other pollen types. Calli-gonum pollen only appears in Calligonum communities (higher than 2%,average is 5%). The results of cluster analysis (ClA) and detrended correspondence analysis (DCA) show that the pollen indication to source plants can be reflected by association indices (A), over-representation in-dices (O), under-representation indices (U), R-value, the av-erage pollen percentages where parent plants are absent (Xa) and the average pollen percentages where parent plants are present (Xp). Zygophyllum, Calligonum, Tetraena, Tribulus and Tamariceae can indicate source plants very well, owing to high A scores. Artemisia, Chenopodiaceae and Gramineae have high R-values, and Nitraria, Cruciferae and sedum have high O scores, so they are over-represented types, but the higher Xp and the lower Xa valu

关键词：中国沙漠地区花粉传播遗传特性繁殖方法

Signal amplificated electrochemical immunosensor for β-lactoglobulin allergen detection in dairy products applying AuNPs/Prussian Blue/CMK-8 composite

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Food Science and Human Wellness 2024年

作者： Jingying Yang lin li xinmiao Ma Shuo Wang Mingfei Pan State Key laboratory of Food Nutrition and Safety Tianjin University of Science and Technology Key laboratory of Food Quality and Health of Tianjin Tianjin University of Science & Technology Tianjin Key laboratory of Food Science and Health School of Medicine Nankai University

Herein， a novel label-free electrochemical immunosensor was fabricated via immobilizing specific anti-β-lactoglobulin （β-lG） antibodies （Abs） onto an integrated electrode of gold nanoparticles （AuNPs） / Prussian Blue （PB） / CMK-8. This immunosensor allowed for the quantitative detection of the major milk allergen β-lG. CMK-8 with excellent electrical conductivity and uniformly adjustable pore structure was modified on the glassy carbon electrode （GCE） and served as the sensitive substrate for the electro-polymerization of PB， forming the redox-active layer. AuNPs were subsequently electrochemically deposited on PB/CMK-8/GCE to improve the electrical conductivity and utilized as the connector for Abs immobilization. During β-lG detection， the Abs-modified AuNPs/PB/CMK-8/GCE exhibited a significant reduction in DPV current signal when exposed to β-lG， displaying an inverse dose-dependent relationship. The developed electrochemical immunosensor demonstrated good detection performance for β-lG， with a wider linear range of 0.01 - 100 ng ml-1and a lower detection limit of 4.72 pg ml-1. Meanwhile， the sensor exhibited remarkable repeatability， reproducibility， stability and anti-interference capabilities， which was further applied to detect β-lG in dairy food， achieving satisfactory recoveries （89.2% - 98.8%） and lower relative standard deviation （ ≤ 3.1%）. Therefore， this innovative electrochemical method for food allergens detection holds great potential application in food safety determination and evaluation.

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Palaeoecological and palaeoenvironmental significance of someimportant spores and micro-algae in Quaternary deposits

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Chinese Science Bulletin 2013年第20期58卷 3125-3139页

作者： TANG lingYu MAO liMi lü xinmiao MA QingFeng ZHOU ZhongZe YANG Chunlei KONG ZhaoChen BATTEN David J State Key laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Key laboratory of Tibetan Environment Changes and land Surface Processes Institute of Tibetan Plateau Research Chinese Academy of Sciences University of Chinese Academy of Sciences School of Resources and Environmental Engineering Anhui University Institute of Botany Chinese Academy of Sciences School of Earth Atmospheric and Environmental Sciences University of Manchester

Spores of ferns and allied plants, and micro-algae frequently occur in abundance in Quaternary deposits, but their palaeoenvironmental significance is seldom evaluated. This paper presents morphological descriptions of spores of Selaginella sinensis (Desv.) Spring, 1843 (Selaginellaceae) and Ceratopteris cf. thalictroides (l.) Brongniart, 1821 (Parkeriaceae) and the algae Pediastrum boryanum (Turpin) Meneghini, 1840, P. simplex Meyen, 1829, P. integrum N geli, 1849 (all Hydrodictyaceae), Spiniferites Mantell, 1850, emend. Sarjeant, 1970 (Spiniferitaceae) and Concentricystes Rossignal, 1962, emend. Jiabo, 1978 (systematic position unclear), and discusses their occurrence in mostly Quaternary sedimentary successions. All are closely associated with aquatic habitats. Extant Selaginella sinensis often colonizes fairly wet hillsides and gaps between rocks, and shady sides of ravines and slopes; it is also found within thickets of trees and shrubs (boscages) and in forests with calcareous soils. Ceratopteris thalictroides, Pediastrum and Concentricystes inhabit freshwater lakes and both natural and artificial wetlands, such as paddy fields and ditches. Spiniferites is a salt-water genus and usually associated with the marine realm. Fossil and subfossil representatives of all of these taxa can be useful proxies of biodiversity and, therefore, also important for determining environmental conditions during the Quaternary period.

关键词：第四纪沉积物古环境意义微型藻类孢子形态古生态蕨类植物石灰性土壤生物多样性

Hydrodynamic process of Tibetan Plateau lake revealed by grain size:Case study of Pumayum Co

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Chinese Science Bulletin 2012年第19期57卷 2433-2441页

作者： JU JianTing ZHU liPing FENG Jinliang WANG JunBo WANG Yong XIE ManPing PENG Ping ZHEN Xiaolin lÜxinmiao Key laboratory of Tibetan Environment Changes and land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China College of Tourism and Geography Sciences Yunan Normal UniversityKunming 650500China

Under the background of global warming,some lakes on the Tibetan Plateau(TP) are potentially sensitive to temperature change.With a case study of Pumayum Co,where glacier meltwater is important to supply(we call this a glacier-fed lake hereafter),we analyze the sensitivity of lake sediment grain size to temperature change.This is done by resolving the modern hydrodynamic process,coupled with comparison of paleoclimatic proxies.According to the spatial distributions of parameters,percentage of grain size and the grain size frequency distribution curve,hydrodynamic processes are analyzed.Five clastic sedimentation types are thereby discriminated.In the open lake area,suspended load transport is the main transport agent.Grain Size Trend Analysis(GSTA),a sediment dynamics model,reveals a trend toward eastward transport.This indicates that the largest and glacier-fed river,the Jiaqu River,influences the entire lake(not just the subsurface alluvial fan),and that lake sediment grain size may serve as a temperature indicator.Time series comparison between grain size of a short core from the central lake and meteorological data confirms this temperature indication,which in turn shows reliability of the method discriminating the hydrodynamic process.This case study will improve the ability of paleoclimatic reconstruction using lake sediment in glacier-fed lakes on the Tibetan Plateau.

关键词：高原湖泊青藏高原晶粒尺寸水动力过程案例显示沉积物粒度动力学过程

Efficacy and safety of transvaginal mesh repair in a cohort with a minimum of 10-year follow-up

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Science China(life Sciences) 2024年第5期67卷 1061-1068页

作者： Zhibo Zhang Jianbin Guo Weijie Tian Ye Zhang Yuelun Zhang Tianshu Sun Jiali Duan xinmiao Bao Yuan Wang Yang Ye Qianqian Gao Honghui Shi Abraham Nick Morse Juan Chen lan Zhu Departmentof Obstetrics and Gynecology Peking Union MedicalCollege HospitalChinese Academyof Medical Sciences&Peking Union MedicalCollegeNational Clinical Research Center for Obstetricand Gynecologic DiseasesBeijing 100730China Department of Gynecology Guizhou Provincial People’s HospitalMedical College of Guizhou UniversityGuiyang 550002China Department of Obstetrics and Gynecology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450000China Medical Research Center Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China Medical Doctor Program Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China Department of Pathology Peking Union Medical College HospitalBeijing 100730China Tufts University School of Medicine Boston MA 02111USA

Although transvaginal mesh(TVM)repair is no longer used in some countries,long-term outcomes after TVM surgery are of great importance globally.However,reports with follow-up>10 years are limited.Thus,this study aimed to report outcomes in a prospective cohort with at least 10 years of follow-up.Women with stageⅢ–Ⅳsymptomatic prolapse were approached consecutively from 2008 to 2013 at one tertiary hospital.The main outcome measure was symptomatic failure.Secondary outcomes included anatomic failure,recurrence,patient satisfaction,complications,and reoperation.The Kaplan-Meier curve was used to estimate the cumulative failure rate.Of the 121 patients enrolled in the study,103(85.1%)completed a median follow-up of 11 years.The estimated probability rates of symptomatic and anatomic failure were 17.6%and 8.8%in 11 years,respectively.The estimated incidence of symptomatic failure increased by 8.2%between 5 and 11 years;however,the corresponding rate for anatomic failure was 3.7%.The most common complication was vaginal mesh exposure,and its estimated probability increased from 19.3%to 28.4%from 5 to 11 years,respectively.Office trimming resolved 80.0%of vaginal exposures.These patients did not report decreased overall satisfaction.Patients with vaginal mesh exposure requiring>3 office procedures or mesh removal in the operating room(5.8%by 11 years)had lower satisfaction rates(Plobal Impression of Improvement≥2 were 2.5%,3.3%,and 94.2%,respectively.The results of this study implied that TVM treatment gradually increased the symptomatic failure rate but provided durable anatomical support of the vaginal wall.Vaginal mesh exposure was common in women who were largely not sexually active;however,80%of the cases could be managed in the outpatient clinic,which did not affect patient satisfaction.

关键词： complication efficacy long-term follow-up pelvic organ prolapse safety transvaginal mesh

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钙钛矿的超快载流子动力学研究进展

石油化工 2024年第6期53卷 912-918页

作者：牛鑫淼中石化(北京)化工研究院有限公司北京100013

在第三代太阳能电池中,钙钛矿太阳能电池最具应用前景。钙钛矿中的载流子动力学行为,包括载流子的生成、转移与复合,与太阳能电池的性能密切相关。由于载流子的动力学过程通常发生在亚皮秒到纳秒的尺度上,因此飞秒瞬态吸收光谱是研究这... 详细信息

在第三代太阳能电池中,钙钛矿太阳能电池最具应用前景。钙钛矿中的载流子动力学行为,包括载流子的生成、转移与复合,与太阳能电池的性能密切相关。由于载流子的动力学过程通常发生在亚皮秒到纳秒的尺度上,因此飞秒瞬态吸收光谱是研究这一瞬态过程的最有力技术。通过分析钙钛矿的飞秒瞬态吸收光谱,综述了钙钛矿的超快载流子动力学的研究进展,包括热载流子的探测、缺陷态捕获以及电荷转移过程,并对飞秒瞬态吸收光谱的发展前景进行了展望。

关键词：钙钛矿太阳能电池飞秒瞬态吸收光谱

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故宫价值的阐释与故宫学的整体论

故宫博物院院刊 2024年第2期 19-33,149页

作者：郑欣淼故宫博物院

故宫遗产的价值是故宫学的核心问题,遗产的价值是需要挖掘阐释的。在20世纪20到80年代,围绕故宫价值的阐释认识发生过六件影响深远的大事。历史实践表明,如何看待故宫价值,从根本上说是一个与历史观、政治观、文化观等相联系的观念问题... 详细信息

故宫遗产的价值是故宫学的核心问题,遗产的价值是需要挖掘阐释的。在20世纪20到80年代,围绕故宫价值的阐释认识发生过六件影响深远的大事。历史实践表明,如何看待故宫价值,从根本上说是一个与历史观、政治观、文化观等相联系的观念问题。21世纪初故宫学概念的提出及逐步建立,是对于故宫价值挖掘阐释的新的重大成果。故宫学研究对象的范围与内涵不仅丰富深邃,而且又是有着内在联系的一个文化整体。文化整体论是故宫学的要旨与鲜明“标识”,并有着多方面的重要意义。

关键词：故宫故宫文化价值阐释故宫学整体论