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New Benthic Fossils from the Late Ediacaran Strata of Southwestern China

Acta Geologica Sinica(English Edition) 2024年第2期98卷 311-323页

作者： LIU Junping LI Ming TANG Feng ZHAO Jiangtai song Sicun ZHOU Ying song xiaohan REN Liudong School of Earth Science and Resources China University of GeosciencesBeijing 10083China Yunnan Institute of Geological Survey Kunming 650216China Chinese Academy of Geological Sciences Beijing 10037China Key Laboratory for Stratigraphy and Paleontology MNRCBeijing 10037China School of Earth Science and Engineering Nanjing UniversityNanjing 210093China Department of Earth Sciences University College LondonLondon WC1E 6BTU.K. CAS and Shandong Province Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdaoShandong 266071China Institute of Geology Chinese Academy of Geological SciencesBeijing 10037China

The Jiangchuan Biota from the Jiucheng Member(Mb.)of the Dengying Formation(Fm.),discovered in Jiangchuan,eastern Yunnan,China,is marked by copious macrofossils at the apex of the Ediacaran strata.This fauna features benthic algae with varied holdfasts and other fossils of indeterminate taxonomic affinity and is compositionally unique compared to the Shibantan and Gaojiashan biotas of the Dengying Fm.and the Miaohe and Wenghui biotas of the Doushantuo Fm.,elsewhere in China.One novel benthic saccular macroalgal fossil,named here Houjiashania yuxiensis gen.and sp.nov.,from the Jiangchuan Biota is based on fossils that are sausage-shaped,elongate,tubular,ranging from 0.3 to 4 cm in length,and up to 0.8 cm in diameter.One terminus is blunt and rounded to an obtuse angle,the other is bent with a spread-out surface resembling a holdfast,suggesting a three-dimensional thallus.Thin,stipe-shaped outgrowths,likely vestiges of sessile saccular life forms,are prevalent in macroalgal fossils of analogous size and shape,as well as present brown algae Scytosiphonaceae,such as Colpomenia and Dactylosiphon.The new findings augment the diversity of benthic algae,such as those known from the Early Neoproterozoic Longfengshan Biota in North China.The benthic algal macrofossils in the Jiucheng Mb.add to knowledge of Late Ediacaran metaphyte diversification and offer more clues about the evolutionary positioning of primitive macroalgae.The co-occurrence of numerous planktonic and benthic multicellular algae and planktonic microbes might have facilitated ecologically the more extensive later Cambrian explosion evidenced by the Chengjiang Biota in Yunnan.

关键词： paleophytology benthic saccular algae algal evolution Neoproterozoic Jiucheng Member Jiangchuan Biota Yunnan Province

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Pyrolysis and coking behavior of typical liquid hydrocarbon fuels in hot pipe

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Huagong Xuebao/CIESC Journal 2024年第2期75卷 626-636页

作者： Li, Haowen Lan, Hao Zheng, Youdan Sun, Yonghui Yang, Zixin song, Qianshi Wang, xiaohan Ganjiang Innovation Academy Chinese Academy of Sciences Jiangxi Ganzhou 341000 China Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangdong Guangzhou 510640 China Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China

The fuel molecular structure is an important factor affecting the pyrolysis coking process in the active cooling channel. Stripping the effect of turbulent diffusion on pyrolysis coking, the pyrolysis coking patterns of typical aviation kerosene components such as n-heptane (nC7H16), iso-heptane (iC7H16), methylcyclohexane (MCH), n-dodecane (nC12H26), and toluene (A1CH3) were compared in a pre-oxidized STS304 (Φ3.0 mm×0.5 mm×1.0 m, outer diameter × wall thickness × length) flow reactor tube at 600—800℃, 1.0 MPa, and under a laminar near-chemical kinetic state. The normalized molar fraction distributions of pyrolysis gas-liquid products of the five typical fuels were quantitatively obtained, and the unsteady-state coking characteristics and along-range coking distribution patterns of the fuels were compared by weighing method. The results show that the conversion of chain alkanes is higher at the lower temperature of 650℃, the conversion of MCH as well as A1CH3 is lower due to the stabilized cyclic structure, and the conversion of A1CH3 increases abruptly above 775℃ . The hydrogen (H2), methane (CH4) content of iC7H16 and MCH is significantly higher due to the presence of branched methyl groups. Straight-chain alkanes have higher contents of ethylene (C2H4) and ethane (C2H6) through β-scission. Propylene (C3H6) is a by-product of C—C bond breakage. The content of C3H6 is higher at lower temperatures, while the content of C2H4 and C3H6 tends to decrease due to the secondary reaction of coking at high temperatures. The main products in the liquid phase included benzene, A1CH3, naphthalene and other diphenyl aromatic hydrocarbons. The content of polycyclic aromatic hydrocarbons (PAHs) increased at high temperatures, and tetraphenyl aromatic hydrocarbons such as perylene, phenanthrene, and anthracene were detected by GC-MS, but they accounted for a very low molar fraction of the bulk phase. The coking rates of MCH and nC12H26 were low at lower temperatures, and the coking rates of MCH and A1CH3 increased significantly

关键词： Paraffins

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Association between prolactin/testosterone ratio and breast cancer in Chinese women

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Chinese Medical Journal 2024年第3期137卷 368-370页

作者： Qian Cai xiaohan Tian Yuyi Tang Han Cong Jie Liu song Zhao Rong Ma Jianli Wang Jiang Zhu Department of Geriatric Medicine Qilu Hospital of Shandong UniversityJinanShandong 250012China Key Laboratory of Cardiovascular Proteomics of Shandong Province Qilu Hospital of Shandong UniversityJinanShandong 250012China Department of Pharmacology School of Basic Medical SciencesShandong UniversityJinanShandong 250012China Department of Breast Surgery General SurgeryQilu Hospital of Shandong UniversityJinanShandong 250012China Department of Thyroid and Breast Surgery Guangdong Second Provincial General HospitalGuangzhouGuangdong 510310China Department of Toxicology and Cancer Biology Collage of MedicineUniversity of KentuckyLexingtonKY 40536USA Department of Immunology School of Basic Medical ScienceShandong UniversityJinanShandong 250012China Department of Gynaecology and Obstetrics Qilu Hospital of Shandong UniversityJinanShandong 250012China

To the Editor:Breast cancer is a prevalent malignant tumor and ranks as the second leading cause of cancer-related deaths globally.^([1])The breast is the target organ of some endocrine hormones,which regulate its growth and development.Aside from estrogen and progesterone,the relationship among prolactin,androgen,and breast cancer has recently garnered increasing attention.

关键词： breast cancer prolactin

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Low genetic diversity in the endangered marine alga Silvetia siliquosa(Ochrophyta:Fucaceae)and the implication to conservation

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Journal of Oceanology and Limnology 2022年第1期40卷 216-225页

作者： Yanshuo LIANG Jie ZHANG xiaohan song Han-Gil CHOI Xu GAO Delin DUAN Zi-min HU CAS and Shandong Province Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy Sciences Beijing 100049China Faculty of Biological Science and Institute for Environmental Science Wonkwang UniversityIksan 54538Korea Ocean School Yantai UniversityYantai 264005China

Although signifi cant research eff orts have been targeted toward conservation and management of endangered terrestrial fl ora and fauna,attempts have been limited to conserve threatened seaweeds.Silvetia siliquosa is an ecologically and commercially vital brown alga that is uniquely distributed in the Yellow-Bohai Sea and along the southwest coast of Korea.A massive decline in its distribution range and biomass from the mid-1990s onward indicates that this species has become endangered.In the present study,we used nuclear internal transcribed spacer and concatenated mitochondrial cytochrome oxidase I subunit+intergenic spacer to estimate the genetic diversity,population connectivity,and degree of genetic diff erentiation of S.siliquosa in China and Korea.The molecular results exhibited strikingly low levels of haplotype/ribotype and nucleotide diversity in S.siliquosa populations,with only three mitochondrial haplotypes and nuclear ribotypes detected in 136 and 143 specimens,respectively.The analysis of molecular variance revealed 85%-95%of genetic variance among populations.Population diff erentiation coeffi cient(F_(ST))and gene fl ow(N_(m))suggested that two populations(JIN and GWA)along the southern coast of Korea are highly divergent from the others,with weak genetic exchange.No signifi cant genetic diff erentiation was observed among populations either in China or along the geographically proximate west coast of Korea.Thus,four independent management units were designated for sustainable management:the LII and RUS populations in China,the YEO and CHA populations along the west coast of Korea,and each of the GWA and JIN populations along the south coast of Korea.We suggest that artifi cial cultivation and transplantation of S.siliquosa are the eff ective approaches for restoration and conservation.

关键词： biodiversity conservation endangered seaweed genetic diversity habitat loss Silvetia siliquosa

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Effect of cOVID-19 lockdown on the characterization and mixing state of carbonaceous particles in the urban atmosphere of Liaocheng, the North China Plain

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Particuology 2023年第7期78卷 23-34页

作者： Min Chen Jingjing Meng Yuanyuan Li Yachen Wang Tonglin Huang Zheng Li xiaohan song Can Wu Zhanfang Hou School of Geography and the Environment Liaocheng UniversityLiaocheng252000China Key Laboratory of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Nomnal University.Shanghai200241China

To investigate the effect of covID-19 control measures on aerosol chemistry,the chemical compositions,mixing states,and formation mechanisms of carbonaceous particles in the urban atmosphere of Liao-cheng in the North China Plain(NCP)were compared before and during the pandemic using a single particle aerosol mass spectrometry(SPAMS).The results showed that the concentrations of five air pollutants including PM2.5,PM1o,SO2,NO2,and cO decreased by 41.2%-71.5%during the pandemic compared to those before the pandemic,whereas O3 increased by 1.3 times during the pandemic because of the depressed titration of O3 and more favorable meteorological conditions.The count and percentage contribution of carbonaceous particles in the total detected particles were lower during the pandemic than those before the pandemic.The carbonaceous particles were dominated by elemental and organic carbon(ECOC,35.9%),followed by elemental carbon-aged(EC-aged,19.6%)and organic carbon-fresh(OC-fresh,13.5%)before the pandemic,while EC-aged(25.3%),ECOC(17.9%),and secondary ions-rich(SEC,17.8%)became the predominant species during the pandemic.The carbonaceous particle sizes during the pandemic showed a broader distribution than that before the pandemic,due to the condensation and coagulation of carbonaceous particles in the aging processes.The relative aerosol acidity(Rra)was smaller before the pandemic than that during the pandemic,indicating the more acidic particle aerosol during the pandemic closely related to the secondary species and relative humidity(RH).More than 95.0%and 86.0%of carbonaceous particles in the whole period were internally mixed with nitrate and sulfate,implying that most of the carbonaceous particles were associated with secondary oxidation during their formation processes.The diurnal variations of oxalate particles and correlation analyses suggested that oxalate particles before the pandemic were derived from aqueous oxidation driven by RH and liquid water content(LwC),while oxalate particles during the pandemic were o

关键词： Carbonaceous particles Oxalate particles Mixing state COVID-19 lockdown Single particle aerosol mass spectrometry(SPAMS)

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Multifunctional catalytic activity of Cu 3 N(001)surface:A first-principles study

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ChemPhysMater 2023年第3期2卷 231-238页

作者： Junru Wang Zhichao Liu Zhenhong Dai xiaohan song Xiaobiao Liu Department of Physics Yantai UniversityYantai 264005China Shandong Institute of Advanced Technology Jinan 250100China School of Science Henan Agricultural UniversityZhengzhou 450002China

Multifunctional catalysts that exhibit high catalytic performance for the hydrogen evolution reaction(HER),oxygen evolution reaction(OER),and oxygen reduction reaction(ORR)in a single material hold great promise for broad-spectrum applications,including overall water splitting,fuel cells,and metal-air batteries.In this first-principles study,Cu_(3) N is computationally demonstrated as a multifunctional electrocatalyst for the HER,OER,and ORR owing to the unique coordination of N and Cu atoms on the(001)surface.Cu_(3) N exhibits better HER catalytic activity than noble Pt-based catalysts.Furthermore,its OER and ORR catalytic activity is comparable to that of commercialized unifunctional catalysts,and its 4e-pathway selectivity is high during the ORR.The catalytic performance of the ORR is significantly improved by the introduction of vacancy defects.The integration of highly efficient HER,OER,and ORR catalytic performance in earth-abundant Cu_(3) N not only opens an avenue for developing cost-efficient omnipotent catalysts but also facilitates advances in clean and renewable energy.

关键词： Multifunctional catalysts Overall water splitting Oxygen reduction Cu_(3)N First principles calculations

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Asymmetric Synthesis of Chiral a-Substituted Mercaptoglycine Derivatives via α-Sulfenylation of Ni（ll） Complex of Glycine and S-Substituted 4-Methylbenzenesulfonothioate

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Chinese Journal of Chemistry 2017年第9期35卷 1383-1390页

作者： Jia Li xiaohan song Shengbin Zhou Jiang Wang Hong Liu CAS Key Laboratory of Receptor Research Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 China University of Chinese Academy of Sciences Beijing 100049 China School of Pharmacy China Pharmaceutical University Nanjing Jiangsu 210009 China

The asymmetric a-sulfenylation of Ni（II） complex of glycine with S-substituted 4-methylbenzenesulfonothioate is reported. Due to the mild and simple reaction conditions, this asymmetric reaction is compatible with v... 详细信息

关键词： α-sulfenylation asymmetric synthesis Ni（II） complex chiral a-substituted mercaptoglycine derivatives

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含P/N/Si木质素基阻燃剂的制备及其阻燃聚乳酸

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高分子材料科学与工程 2024年第3期40卷 12-22页

作者：宋艳杨晓涵林肯单雪影李锦春常州大学材料科学与工程学院江苏常州213164 常州大学环境科学与工程学院江苏常州213164

以碱木质素(Lig)为原料,3-氨丙基三甲氧基硅烷、4-(二乙氨基)水杨醛和9,10-二氢-9-氧-10-磷杂菲-10-氧化物为改性剂,通过三步法成功制备了一种含磷、氮、硅元素的木质素基阻燃剂(FR-Lig)。热失重分析表明,与Lig相比,FR-Lig在空气中具有... 详细信息

以碱木质素(Lig)为原料,3-氨丙基三甲氧基硅烷、4-(二乙氨基)水杨醛和9,10-二氢-9-氧-10-磷杂菲-10-氧化物为改性剂,通过三步法成功制备了一种含磷、氮、硅元素的木质素基阻燃剂(FR-Lig)。热失重分析表明,与Lig相比,FR-Lig在空气中具有良好的热稳定性能和成炭能力,其T5%提高了45℃,550℃时的残留量由1.8%提高到31.6%。然后将FR-Lig用于制备全生物基阻燃聚乳酸复合材料(FR-Lig/PLA),对材料的阻燃性能、热稳定性能、燃烧行为等进行了研究。结果表明,FR-Lig的加入可提高PLA的阻燃性能,当添加量为20%时,LOI值可增加至27.5%,垂直燃烧Ul-94过V-0级;即使质量分数10%的加入,也可使PLA的LOI值增加2个数值,UL-94由无等级提高至V-2级,对应PLA的拉伸强度为41.8 MPa,与纯PLA相比,冲击强度可提升约60%;而且,FR-Lig/PLA材料的热稳定性能、耐火性能和抑烟能力得到了提升。此外,残炭的表征及PLA的热重-红外联用分析表明,气相阻燃和凝聚相阻燃在PLA中共同发挥作用,以后者为主,并提出了可能的阻燃机理。

关键词：碱木质素生物基阻燃剂聚乳酸阻燃性能热稳定性能

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STS304管表面“氧化+结焦”处理对碳氢燃料热解结焦的抑制作用

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燃烧科学与技术 2024年第1期30卷 53-60页

作者：李浩文杨子昕张威宋谦石汪小憨中国科学院广州能源研究所广州510640 中国科学院可再生能源重点实验室广州510640 中国科学院大学北京100049 中国科学技术大学能源科学与技术学院合肥230026

采用氧化或结焦方式对STS304内表面进行预处理,得到反应管O-STS304、C-STS304、OC-STS304,将其与STS304和TA管开展SEM/AFM表面形貌、表面元素XPS和导热系数等参数测试.结焦引入碳层增加了STS304内表面的粗糙度以及导热热阻,但一定程度... 详细信息

采用氧化或结焦方式对STS304内表面进行预处理,得到反应管O-STS304、C-STS304、OC-STS304,将其与STS304和TA管开展SEM/AFM表面形貌、表面元素XPS和导热系数等参数测试.结焦引入碳层增加了STS304内表面的粗糙度以及导热热阻,但一定程度抑制了催化结焦,同时提高了管材耐温性.采用MCH热解结焦实验发现,氧化和结焦预处理对热解影响很小,结焦处理可以显著降低催化反应管的结焦速率,5种管材的结焦速率排序为STS304>O-STS304>OC-STS304>TA>C-STS304.因此,对镍基催化反应管进行结焦预处理可以有效抑制结焦.

关键词：碳氢燃料热解结焦流动反应器表面结焦钝化反应管材质

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元宇宙赋能职业教育教与学范式转型目标、内容与实施路径

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职业技术 2024年第6期23卷 40-47页

作者：宋玲玲孔霄汉滨州职业学院山东滨州256600 中国海洋大学山东青岛266100

元宇宙作为新一代网络信息技术的典型代表,为教育领域的深刻变革带来了机遇和挑战。通过剖析元宇宙赋能职业教育教与学范式转型的建构特征,为教育元宇宙建设提供理论指导和现实依据,助推教育元宇宙建设实践。基于国内外教育元宇宙最新... 详细信息

元宇宙作为新一代网络信息技术的典型代表,为教育领域的深刻变革带来了机遇和挑战。通过剖析元宇宙赋能职业教育教与学范式转型的建构特征,为教育元宇宙建设提供理论指导和现实依据,助推教育元宇宙建设实践。基于国内外教育元宇宙最新研究成果及实践探索,以具身认知理论、沉浸理论、建构主义等教育理论为依据,分析元宇宙的特征与知识结构,深入探讨虚拟身份、沉浸式体验、开放性、知识互动等元宇宙特性与实现沉浸式、个性化、全场景交互式学习的重要关系,以洞察元宇宙赋能职业教育教与学范式转型的目标、内容与实施路径。元宇宙视角下教与学范式有别于传统教学模式,有三个重要目标:实现个性化教学、实现大规模超域协同学习、实现沉浸式学习;元宇宙对教学过程、教学组织形式、教师角色等将产生颠覆性影响。通过构建个性化学习过程结构、构建教育元宇宙模型、构建课堂视场结构和组成结构、建立动态智能学习评推系统,明晰了元宇宙赋能职业教育教与学范式转型的实施路径。

关键词：教育元宇宙职业教育教与学范式转型实施路径

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