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Rare Metals 2024年第7期43卷 3232-3241页

作者： xin qian Hao-Ran Guo Jia-xin Lyu Bang-Fu Ding xing-Yuan San Xiao Zhang Jiang-Long Wang Shu-Fang Wang Hebei Key Lab of Optic-Electronic Information and Materials College of Physics Science and TechnologyHebei University College of Electron and Information Engineering Hebei University Research Institute for Frontier Science Beihang University

SnTe has received considerable attention as an environmentally friendly alternative to the representative thermoelectric material of ***,excessive hole carrier concentration in SnTe results in an extremely low Seebeck coefficient and high thermal conductivity,which makes it exhibit relatively inferior thermoelectric *** this work,the thermoelectric performance of p-type SnTe is enhanced through regulating its energy band structures and reducing its electronic thermal conductivity by combining Bi doping with CdSe ***,the carrier concentration of SnTe is successfully suppressed via Bi doping,which significantly decreases the electronic thermal ***,the convergence and flattening of the valence bands by alloying CdSe effectively improves the effective mass of SnTe while restraining its carrier ***,a maximum figure of merit（ZT） of～ 0.87 at 823 K and an average ZT of～ 0.51 at 300-823 K have been achieved in Sn0.96Bi0.04Te-5%*** results indicate that decreasing the electronic thermal conductivity is an effective means of improving the performance of thermoelectric materials with a high carrier concentration.

关键词： Thermoelectric materials SnTe Energy band structure Electronic thermal conductivity ZT value

Managing immune checkpoint inhibitor-associated gastritis: Insights and strategies

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World Journal of Gastroenterology 2024年第24期30卷 3120-3122页

作者： Li-Li Yu Zhi-Lin He xin-Lai qian Department of Pathology The Third Affiliated Hospital of Xinxiang Medical UniversityXinxiang Medical UniversityXinxiang 453003Henan ProvinceChina Department of Basic Medical Sciences Xinxiang Medical UniversityXinxiang 453003Henan ProvinceChina

Immune checkpoint inhibitors(ICIs)are widely used due to their effectiveness in treating various ***-related adverse events(irAEs)are defined as adverse effects resulting from ICI *** irAEs are a common type of irAEs characterized by intestinal side effects,such as diarrhea and colitis,which may lead to the discontinuation of ICIs.

关键词： Immunotherapy Immune checkpoint inhibitor Immune checkpoint inhibitor-related gastritis Immune-related adverse events Autoimmune responses

Strategies to advance thermoelectric performance of PbSe and PbS materials

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Rare Metals 2024年第9期43卷 4099-4114页

作者： Zheng-Hao Hou xin qian Qiu-Juan Cui Shu-Fang Wang Li-Dong Zhao Shijiazhuang Key Laboratory of Low Carbon Energy Materials College of Chemical EngineeringShijiazhuang University Hebei Key Lab of Optic-Electronic Information and Materials College of Physics Science and Technology Hebei University School of Materials Science and Engineering Beihang University

Thermoelectric materials possess the unique capability to convert thermal energy into electric energy and vice versa, making them promising for waste heat recovery and efficient cooling systems. Currently, extensively investigated thermoelectric materials such as Bi2Te3,PbTe and GeTe exhibit superior thermoelectric properties at room temperature and medium temperature ***, the broad application of these thermoelectric materials has been impeded by the high cost and restricted accessibility of Te and Ge in the earth's crust. Over the past few years, researchers have shown increasing interest in PbSe-and PbS-based materials, primarily attributed to their abundant elemental supply and relatively low costs. The assessment of research progress and a comprehensive overview of optimization strategies in time can significantly contribute to further improving the thermoelectric performance. These strategies include optimizing carrier concentration(aliovalent doping, dynamic doping and defect state), enhancing density-of-state effective mass(band convergence, band flattening and energy filtering effect), optimizing carrier mobility(band sharpening and band alignment) and reducing lattice thermal conductivity(all-scale hierarchical defect structures designing). This systematic summary and analysis provide novel insights and perspectives for the development of thermoelectric materials.

关键词： Carrier concentration

Probiotics administration alleviates cognitive impairment and circadian rhythm disturbance induced by sleep deprivation

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Food Science and Human Wellness 2024年第4期13卷 1951-1961页

作者： Peijun Tian Yunfei Hou Zheng Wang Jiaona Jiang xin qian Zhihao Qu Jianxin Zhao Gang Wang Wei Chen State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxi 214122China School of Food Science and Technology Jiangnan UniversityWuxi 214122China National Engineering Research Center for Functional Food Jiangnan UniversityWuxi 214122China Institute of Food Biotechnology(Yangzhou) Jiangnan UniversityYangzhou 225004China

Gut microbiome is indispensable for maintaining normal brain ***,gut microbiota plays a causal role in sleep deprivation(SD)-induced cognitive *** this study,neurobehavioral effects of the Bifidobacterium breve strain(CCFM1025)were assessed in sleep-deprived ***1025 improved the body weight and food and water intake of the *** also alleviated SD-induced cognitive behavioural abnormalities(in the novel object recognition test),but did not show beneficial effects on mood-and spatial memory-related ***1025 significantly altered the gut microbial composition and genome *** microbial metabolites that may regulate sleep function were also identified,such as isovaleric acid andγ-aminobutyric acid in the gut and purine metabolites in the *** metabolites may participate in gutbrain communication by acting on the striatal melatonin system,for example to increase melatonin levels,and by regulating the expression of circadian clock genes such as those encoding the adenosine A2A receptor and period circadian regulator ***,administration of probiotics alleviated cognitive impairment and circadian rhythm disturbance induced by SD via modulation of gut microbiome and its *** findings may help guide the treatment of insomnia or other sleep disorders via dietary strategies.

关键词： Bifidobacterium Sleep Circadian rhythm Purine Gut microbiome

Functional dissection of parabrachial substrates in processing nociceptive information

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Zoological Research 2024年第3期45卷 633-647页

作者： Jin Ke Wei-Cheng Lu Hai-Yang Jing Shen qian Sun-Wook Moon Guang-Fu Cui Wei-xin qian Xiao-Jing Che qian Zhang Shi-Shi Lai Ling Zhang Ying-Jie Zhu Jing-Dun Xie Tian-Wen Huang Shenzhen Key Laboratory of Drug Addiction Shenzhen-Hong Kong Institute of Brain ScienceBrain Cognition and Brain Disease InstituteShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong 518055China CAS Key Laboratory of Brain Connectome and Manipulation Brain Cognition and Brain Disease InstituteShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong 518055China University of Chinese Academy of Sciences Beijing 100049China Department of Anesthesiology State Key Laboratory of Oncology in South ChinaGuangdong Provincial Clinical Research Center for CancerSun Yat-sen University Cancer CenterGuangzhouGuangdong 510060China University of Science and Technology of China HefeiAnhui 230027China Department of Anesthesiology Shenzhen University General Hospital and Shenzhen University Academy of Clinical Medical SciencesShenzhen UniversityShenzhenGuangdong 518055China School of Medicine Yunnan UniversityKunmingYunnan 650091China

Painful stimuli elicit first-line reflexive defensive reactions and,in many cases,also evoke second-line recuperative behaviors,the latter of which reflects the sensing of tissue damage and the alleviation of *** lateral parabrachial nucleus(lPBN),composed of external-(elPBN),dorsal-(dlPBN),and central/superior-subnuclei(jointly referred to as slPBN),receives sensory inputs from spinal projection neurons and plays important roles in processing affective information from external threats and body integrity ***,the organizational rules of lPBN neurons that provoke diverse behaviors in response to different painful stimuli from cutaneous and deep tissues remain *** this study,we used region-specific neuronal depletion or silencing approaches combined with a battery of behavioral assays to show that slPBN neurons expressing substance P receptor(NK1R)(lPBNNK1R)are crucial for driving pain-associated self-care behaviors evoked by sustained noxious thermal and mechanical stimuli applied to skin or bone/muscle,while elPBN neurons are dispensable for driving such ***,lPBNNK1R neurons are specifically required for forming sustained somatic pain-induced negative teaching signals and aversive memory but are not necessary for fear-learning or escape behaviors elicited by external ***,both lPBNNK1R and elPBN neurons contribute to chemical irritant-induced nocifensive *** results reveal the functional organization of parabrachial substrates that drive distinct behavioral outcomes in response to sustained pain versus external danger under physiological conditions.

关键词： Lateral parabrachial nucleus Substance P receptor Pain affect Defensive reaction Somatosensory

Provenance and paleogeographic evolution of the Upper Paleozoic–Lower Mesozoic strata in northern Laos

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Journal of Earth Science 2024年

作者： Jingjie Jin xin qian Vongpaseuth Senebouttalath Yuzhi Zhang Yuejun Wang Guangdong Provincial Key Lab of Geodynamics and Geohazards School of Earth Sciences and Engineering Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Ministry of Energy and Mines Department of Geology and Minerals

The Late Paleozoic–Early Mesozoic sedimentary system of the Luang Prabang Paleotethyan back-arc basin in northern Laos is important for investigating sedimentary provenance， paleogeographic patterns， and the tectonic evolution of the Eastern Paleotethyan Ocean. This study presents systematic stratigraphy， petrology， geochemistry， and detrital zircon U–Pb–Hf isotopic analyses for the Late Carboniferous–Jurassic sedimentary strata on both sides of the Luang Prabang basin. Based on distinct stratigraphic ages and provenance characteristics， the clastic rock samples can be divided into four groups. The Group 1 Late Carboniferous–Early Permian samples from the western part of the basin yield detrital zircon age-peaks of ～348 and ～1425 Ma， with corresponding εHf(t) values ranging from -2.0 to +15.5 and +1.5 to +14， respectively. The age spectrum of Group 2 Late Carboniferous–Early Permian samples from the eastern part of the basin shows major age-peaks of ～287 and ～1860 Ma， with εHf(t) values of -5.9–-0.9 and -3.6–+4.2， respectively. Group 3 Late Permian–Triassic samples exhibit age-peaks of ～242 and ～1853 Ma， along with εHf(t) values of -0.7–+14.4 and -5.4–-1.8， respectively. Group 4 Middle–Late Jurassic samples yield age-peaks of ～237，～431，～813，～1833， and ～2460 Ma， lacking Late Devonian (413–345 Ma) detrital zircons. All these data collectively suggest that the Group 1 sample primarily originated from the Sukhothai Arc in western Indochina， Group 2 was from the Kontum and Truong Son in eastern Indochina， and Group 3 has a combined provenance of the Sukhothai， Kontum， and Truong Son. Regional comparisons suggest that the Jurassic provenance was mainly derived from South China， which was imported through the northern river system. Our data， combined with the regional angular unconformities between Jurassic continental strata and pre-Jurassic marine strata， suggest that the Luang Prabang basin transformed into a superimposed collisional retroforeland basin during the Ju

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视频化生存时代的失神症及其时间弥合机制研究

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新闻大学 2024年第4期 93-104,120页

作者：刘倩欣刘涛暨南大学新闻与传播学院广东广州510632

失神症喻示了一种点状的时间形态。在该视角下,绵延时间体验的形成有赖于技术假体对时间缝隙的弥合。由此,失神症为思考媒介技术如何形塑人类时间体验提供了新的认知维度。维利里奥主要立足电影而提出失神症及相关思想。在短视频时代,... 详细信息

失神症喻示了一种点状的时间形态。在该视角下,绵延时间体验的形成有赖于技术假体对时间缝隙的弥合。由此,失神症为思考媒介技术如何形塑人类时间体验提供了新的认知维度。维利里奥主要立足电影而提出失神症及相关思想。在短视频时代,失神症在发生场景、症候表现和运作机制三方面形成了新的内涵,建构了新的时间观念及实践:维利里奥论述的基点——“醒与梦”不再清晰区分,人与时间的关系看似恢复和谐,但人的主体性可能已因速度的暴力而破碎。

关键词：短视频媒介时间保罗·维利里奥媒介批评

华南陆块东部中生代基性岩浆活动及其构造启示

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科学通报 2024年第18期69卷 2618-2631页

作者：甘成势钱鑫张玉芝王岳军中山大学地球科学与工程学院广东省地球动力作用与地质灾害重点实验室珠海519080 南方海洋科学与工程广东省实验室(珠海) 珠海519080

华南陆块东部在中生代时期主要受古特提斯和古太平洋两大构造域的影响,发育多期岩浆活动和大规模成矿作用,但两大构造域的转换时间及过程存在较大争议.基性岩是研究软流圈、岩石圈地幔和俯冲板片相互作用的理想对象,本文系统厘定了华南... 详细信息

华南陆块东部在中生代时期主要受古特提斯和古太平洋两大构造域的影响,发育多期岩浆活动和大规模成矿作用,但两大构造域的转换时间及过程存在较大争议.基性岩是研究软流圈、岩石圈地幔和俯冲板片相互作用的理想对象,本文系统厘定了华南陆块东部中生代基性岩(228~69 Ma)的时空格架及元素-同位素时空演变规律,取得了以下主要认识:(1)侏罗纪和白垩纪基性岩按照岩相学和元素-同位素地球化学特征均可分为OIB、类OIB和“岛弧”/岛弧型三类,它们来源于不同的地幔源区;(2)侏罗纪“岛弧”型基性岩的时空分布和元素-同位素地球化学性质明显有别于晚三叠世基性岩和白垩纪岛弧型基性岩,说明它们并非是与古太平洋板块俯冲相关的岛弧岩浆,其“岛弧”性质很可能是继承了源区的特征;(3)两大构造域转换的起始时间为早侏罗世早期(约200 Ma),完成转换的最终时间为中-晚侏罗世之交(约170 Ma);(4)古太平洋构造域自晚侏罗世以来对华南陆块东部的影响越来越明显,白垩纪时期的板片交代影响范围仅局限于赣江断裂以东地区;(5)白垩纪基性岩主要形成于两个峰期(约125和90 Ma),与古太平洋板块的两期俯冲-回撤作用有关.

关键词：中生代基性岩古太平洋构造域古特提斯构造域构造转换华南陆块

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T6热处理对多向锻态VWZ113K稀土镁合金微观组织及力学性能的影响

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塑性工程学报 2024年第5期31卷 198-207页

作者：车鑫段兴旺江东辛向前谈芸芸太原科技大学材料科学与工程学院山西太原030024

以多向锻造Mg-11Gd-3.6Y-2Zn-0.6Zr稀土镁合金为研究对象,利用扫描电镜、能谱分析、电子背散射衍射技术及室温拉伸实验分析了T5和T6热处理工艺对多向锻态稀土镁合金组织和力学性能的影响规律。结果表明,T5热处理后合金为混晶组织,晶界... 详细信息

以多向锻造Mg-11Gd-3.6Y-2Zn-0.6Zr稀土镁合金为研究对象,利用扫描电镜、能谱分析、电子背散射衍射技术及室温拉伸实验分析了T5和T6热处理工艺对多向锻态稀土镁合金组织和力学性能的影响规律。结果表明,T5热处理后合金为混晶组织,晶界分布有大尺寸长周期堆垛有序(LPSO)结构强化相,合金的屈服强度、抗拉强度及伸长率分别为241 MPa、357 MPa及13.0%;在T6热处理中,随着固溶温度的升高,静态再结晶逐渐形核并长大,促进了组织均匀性提升;但晶粒长大会消耗位错并降低位错强化效应;同时,升温加速了LPSO结构强化相回溶,晶界LPSO结构强化相变得更加细小弥散,促进了弥散强化作用;此外,固溶温度升高还会导致晶粒择优长大,促进织构强化;430℃、8 h+225℃、16 h是最佳热处理工艺,合金的屈服强度、抗拉强度及伸长率分别可达302 MPa、398 MPa及11.5%;多种强化机制均衡作用促使合金强塑性协同提升。

关键词：稀土镁合金多向锻造热处理微观组织强化机制

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典型城市河网沉积物微塑料时空分布特征

环境科学 2024年第4期45卷 2142-2149页

作者：许万璐范一凡钱新南京大学环境学院污染控制与资源化研究国家重点实验室南京210023

微塑料是近年来广受关注的一类新污染物.淡水系统沉积物作为微塑料重要的汇,能反映出当地微塑料的长期污染水平.为探究典型城市河网沉积物中微塑料的时空分布特征,于2018年12月和2019年6月在望虞河西岸河网区分别采集了17个采样点的沉... 详细信息

微塑料是近年来广受关注的一类新污染物.淡水系统沉积物作为微塑料重要的汇,能反映出当地微塑料的长期污染水平.为探究典型城市河网沉积物中微塑料的时空分布特征,于2018年12月和2019年6月在望虞河西岸河网区分别采集了17个采样点的沉积物样品,使用体视显微镜和显微傅立叶变换红外光谱仪对微塑料进行形态观察以及成分鉴定.结果表明,微塑料的平均丰度(以dw计)为323.37 n·kg^(-1),形状主要为碎片和纤维,颜色以黑色和蓝色为主,粒径主要分布在50~500μm之间,成分以PET、PE、PVE、PS和PP为主.夏季微塑料的丰度低于冬季,河网区上游地区微塑料的丰度高于中游和下游地区,最高丰度出现在污水处理厂的出水口采样点,沉积物中微塑料的丰度与表层水中微塑料的丰度无显著相关性.应用正定矩阵因子分解(PMF)模型解析微塑料的来源,发现微塑料的主要来源有农用塑料薄膜、生活废水、塑料垃圾以及工业生产.研究可为典型城市河网微塑料污染防控提供支撑.

关键词：城市河网微塑料(MPs) 沉积物时空分布来源