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Antisymmetric planar Hall effect in rutile oxide ﬁlms induced by the Lorentz force

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Science Bulletin 2024年第15期69卷 2362-2369页

作者： Yongwei Cui Zhaoqing Li Haoran chen Yunzhuo Wu Yue chen Ke Pei Tong Wu Nian Xie Renchao che Xuepeng Qiu Yi liu Zhe Yuan Yizheng Wu Department of Physics State Key Laboratory of Surface PhysicsFudan UniversityShanghai 200433China Institute for Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200433China Interdisciplinary Center for Theoretical Physics and Information Sciences Fudan UniversityShanghai 200433China Center for Advanced Quantum Studies and Department of Physics Beijing Normal UniversityBeijing 100875China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438China Shanghai Key Laboratory of Special Artiﬁcial Microstructure Materials and Technology School of Physics Science and EngineeringTongji UniversityShanghai 200092China Zhejiang Laboratory Hangzhou 311100China Shanghai Research Center for Quantum Sciences Shanghai 201315China Shanghai Key Laboratory of Metasurfaces for Light Manipulation Fudan UniversityShanghai 200433China

The conventional Hall effect is linearly proportional to the field component or magnetization component perpendicular to a film. Despite the increasing theoretical proposals on the Hall effect to the in-plane field or magnetization in various special systems induced by the Berry curvature, such an unconventional Hall effect has only been experimentally reported in Weyl semimetals and in a heterodimensional superlattice. Here, we report an unambiguous experimental observation of the antisymmetric planar Hall effect(APHE) with respect to the in-plane magnetic field in centrosymmetric rutile RuO_(2) and IrO_(2) single-crystal films. The measured Hall resistivity is found to be linearly proportional to the component of the applied in-plane magnetic field along a particular crystal axis and to be independent of the current direction or temperature. Both the experimental observations and theoretical calculations confirm that the APHE in rutile oxide films is induced by the Lorentz force. Our findings can be generalized to ferromagnetic materials for the discovery of anomalous Hall effects and quantum anomalous Hall effects induced by in-plane magnetization. In addition to significantly expanding knowledge of the Hall effect, this work opens the door to explore new members in the Hall effect family.

关键词： Antisymmetric planar Hall effect Lorentz force Rutile oxide films Crystal symmetry

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辉钼矿与滑石浮选药剂研究进展

金属矿山 2024年第2期 56-68页

作者：刘栖巧车宇航陈伟刘胜赵刚杨柳中南大学化学化工学院湖南长沙410083 矿物加工科学与技术国家重点实验室北京102628

辉钼矿和滑石共伴生关系密切且可浮性相近,因此两者的高效分离一直是浮选领域的难点。目前辉钼矿-滑石分离工艺主要有浮钼抑滑石的正浮选和先浮选脱除滑石再浮钼的反浮选两类,两种工艺都涉及辉钼矿与滑石的抑制剂和辉钼矿捕收剂。近些... 详细信息

辉钼矿和滑石共伴生关系密切且可浮性相近,因此两者的高效分离一直是浮选领域的难点。目前辉钼矿-滑石分离工艺主要有浮钼抑滑石的正浮选和先浮选脱除滑石再浮钼的反浮选两类,两种工艺都涉及辉钼矿与滑石的抑制剂和辉钼矿捕收剂。近些年来报道了很多辉钼矿-滑石分离的新型药剂,但是缺乏对药剂化学组成、官能团和空间构型等方面相似性、递变性和差异性的系统总结和分析。因此,在总结了目前辉钼矿和滑石晶体结构与亲/疏水特性的研究进展基础上,较详细论述了辉钼矿和滑石抑制剂类型、吸附机理和应用效果,分析了抑制剂作用的构效关系,并介绍了辉钼矿/滑石抑制剂和辉钼矿捕收剂的分子设计最新进展。通过总结晶体结构和基面/端面的亲/疏水性性质,发现两种矿物的端面都存在离子溶解、氧化等行为,导致其亲水性较强,但由于基面占据了整体表面积的90%以上,因此两种矿物整体上表现出较好的天然疏水性,这是其浮选分离困难的根本原因。水溶性金属盐是传统的辉钼矿和滑石的无机抑制剂,存在用量大、选择性差的缺点,因而其应用受到限制。有机高分子物质是辉钼矿/滑石抑制剂的研究热点,该类药剂在矿浆中往往表现为酸性,此时辉钼矿/滑石表面的碱度越高,两者间的相互作用就越强;在“强相互作用”时,这种酸碱相互作用可能表现为化学吸附,而在“弱相互作用”时,该作用表现为疏水吸引、氢键吸引、静电吸引等形式的弱吸附,这类抑制剂包括目前大量报道的多糖、腐殖酸等。因此,基于抑制剂在官能团种类与数量、空间构型等因素作用下与两种矿物的基/端面的Mo/Mg金属位点吸附的构效关系,采用组合或者接枝合成等方式设计高选择性分子结构,是开发辉钼矿/滑石抑制剂的思路之一。传统辉钼矿捕收剂以烃油类和巯基类药剂为主,但分别存在分散性差和对辉钼矿-硫化矿脉石的选择性差的缺陷,因此在烃油类捕收剂基础上,从捕收剂分子与辉钼矿端面暴露位点、氧化组分、溶解组分的化学作用出发,设计含有N、P、S等元素的高选择性捕收剂,实现表面氧化、溶解严重的微细粒辉钼矿的选择性捕收,是辉钼矿捕收剂分子设计的方向之一。抑制剂和辉钼矿捕收剂是辉钼矿和滑石浮选分离的关键,设计绿色高效的新型药剂对辉钼矿的开发具有重要意义。

关键词：浮选辉钼矿滑石捕收剂抑制剂构效关系

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高碳中锰耐磨钢凝固过程溶质微观偏析模型

工程科学学报 2024年第6期46卷 1089-1096页

作者：李民刘洪波车晓锐刘颖张杰张彩东田志强徐浩河钢材料技术研究院石家庄050023 北京科技大学冶金与生态工程学院北京100083 北京科技大学工程技术研究院北京100083

通过定向凝固、电子探针(EPMA)、Factsage等多种实验与理论计算相结合的手段对中锰耐磨钢凝固过程溶质元素微观偏析行为进行了系统研究.研究表明在定向凝固试验中当拉速为50μm·s-1时,中锰钢的二次枝晶间距平均值为59.77μm;中锰钢凝... 详细信息

通过定向凝固、电子探针(EPMA)、Factsage等多种实验与理论计算相结合的手段对中锰耐磨钢凝固过程溶质元素微观偏析行为进行了系统研究.研究表明在定向凝固试验中当拉速为50μm·s-1时,中锰钢的二次枝晶间距平均值为59.77μm;中锰钢凝固过程组织转变为L→L+γ→γ属于奥氏体凝固模式,无包晶反应的发生,也无铁素体相及其他相的出现;中锰钢定向凝固过程中Mn、Cr在枝晶间的含量明显高于枝晶内,表明Mn、Cr元素发生了明显的正偏析行为;通过对各特征参数求解,构建了中锰钢溶质元素微观偏析模型,发现中锰钢定向凝固过程中Mn元素偏析指数与Brody–Flemings模型符合较好,而Cr元素偏析指数与Clyne–Kurz模型分布较为一致.

关键词：中锰耐磨钢电子探针定向凝固二次枝晶间距微观偏析模型

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酿酒酵母Y-8对发酵香肠品质与风味的影响

食品科学 2024年第7期45卷 119-126页

作者：范鑫洋张香美刘程鹏纪锡伟车淇河北经贸大学生物科学与工程学院河北石家庄050061

为改善发酵香肠的品质与风味,将酿酒酵母Y-8接种到发酵香肠中,探究不同比例酿酒酵母(Saccharomyces cerevisiae)Y-8与植物乳植杆菌(Lactiplantibacillus plantarum)Z43复配对发酵香肠理化性质、挥发性风味物质与脂肪酸的影响。分别通过... 详细信息

为改善发酵香肠的品质与风味,将酿酒酵母Y-8接种到发酵香肠中,探究不同比例酿酒酵母(Saccharomyces cerevisiae)Y-8与植物乳植杆菌(Lactiplantibacillus plantarum)Z43复配对发酵香肠理化性质、挥发性风味物质与脂肪酸的影响。分别通过气相色谱-离子迁移谱、气相色谱-质谱联用技术测定挥发性风味物质与脂肪酸。结果表明:添加酿酒酵母Y-8可以促进发酵香肠中酯类和醇类物质产生、降低乙酸含量、提高最终pH值、增加油酸相对含量、快速降低肠杆菌数;使用正交偏最小二乘判别分析建立模型,结合变量投影重要性(variable importance projection,VIP)值筛选出17种差异挥发性风味物质(VIP>1),可以对不同比例酿酒酵母Y-8与植物乳植杆菌Z43复配发酵香肠做出很好地区分;植物乳植杆菌Z43与酿酒酵母Y-8以20∶1(植物乳植杆菌Z43接种量为107 CFU/g)比例复配发酵香肠感官综合评分最高、色度值最大,硬度显著高于其他组(P<0.05),且3-羟基-2-丁酮含量明显高于其余3组;接种酿酒酵母Y-8可以赋予发酵香肠浓郁的醇香和酯香、有效祛除酸味、提高发酵香肠的品质和安全性,此结果可为酿酒酵母在发酵肉制品中的应用提供参考。

关键词：酿酒酵母发酵香肠挥发性风味物质脂肪酸

超声光散射断层成像系统诊断微小乳腺癌的研究进展

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中国介入影像与治疗学 2024年第3期21卷 182-184页

作者：刘茵芷胡兵车鹏飞黄清云三峡大学附属仁和医院超声影像科湖北宜昌443001

乳腺癌是全球范围内女性最常见恶性肿瘤,早期诊断和治疗是改善预后的关键。乳腺X线摄影和超声检查等常规影像学筛查手段用于诊断微小乳腺癌效能不佳。超声光散射断层成像系统(OPTIMUS)通过结合光散射断层成像(DOT)与超声成像评估乳腺组... 详细信息

乳腺癌是全球范围内女性最常见恶性肿瘤,早期诊断和治疗是改善预后的关键。乳腺X线摄影和超声检查等常规影像学筛查手段用于诊断微小乳腺癌效能不佳。超声光散射断层成像系统(OPTIMUS)通过结合光散射断层成像(DOT)与超声成像评估乳腺组织内部血管分布和代谢水平,对于诊断直径≤1.0 cm微小乳腺癌具有独特优势。本文就OPTIMUS诊断微小乳腺癌研究进展进行综述。

关键词：乳腺疾病体层摄影术光学超声检查

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Ferroptosis biomarkers predict tumor mutation burden's impact on prognosis in HER2-positive breast cancer

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World Journal of Clinical Oncology 2024年第3期15卷 391-410页

作者： Jin-Yu Shi Xin che Rui Wen Si-Jia Hou Yu-Jia Xi Yi-Qian Feng Ling-Xiao Wang Shi-Jia liu Wen-Hao Lv Ya-Fen Zhang Department of Breast Surgery The Fifth Hospital of Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina The Fifth Clinical Medical College Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina Department of Colorectal Surgery The Fifth Hospital of Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina College of Pharmacy Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina Department of Neurology The First Hospital of Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina Department of Urology The Second Hospital of Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina Department of Breast Surgery The First Hospital of Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina

BACKGROUND Ferroptosis has recently been associated with multiple degenerative *** induction in cancer cells is a feasible method for treating neoplastic ***,the association of iron proliferation-related genes with prognosis in HER2+breast cancer(BC)patients is *** To identify and evaluate fresh ferroptosis-related biomarkers for HER2+*** First,we obtained the mRNA expression profiles and clinical information of HER2+BC patients from the TCGA and METABRIC public databases.A four gene prediction model comprising PROM2,SLC7A11,FANCD2,and FH was subsequently developed in the TCGA cohort and confirmed in the METABRIC *** were stratified into high-risk and low-risk groups based on their median risk score,an independent predictor of overall survival(OS).Based on these findings,immune infiltration,mutations,and medication sensitivity were analyzed in various risk ***,we assessed patient prognosis by combining the tumor mutation burden(TMB)with risk ***,we evaluated the expression of critical genes by analyzing single-cell RNA sequencing(scRNA-seq)data from malignant vs normal epithelial *** We found that the higher the risk score was,the worse the prognosis was(P<0.05).We also found that the immune cell infiltration,mutation,and drug sensitivity were different between the different risk *** highrisk subgroup was associated with lower immune scores and high ***,we found that the combination of the TMB and risk score could stratify patients into three groups with distinct ***-HTMB patients had the worst prognosis,whereas LRisk-LTMB patients had the best prognosis(P<0.0001).Analysis of the scRNAseq data showed that PROM2,SLC7A11,and FANCD2 were significantly differentially expressed,whereas FH was not,suggesting that these genes are expressed mainly in cancer epithelial cells(P<0.01).CONCLUSION Our model helps guide the prognosis of HER2+breast cancer pa

关键词： HER2+breast cancer Ferroptosis Tumor mutation burden Single-cell RNA sequencing Prognosis

Enhanced release of the poorly soluble drug itraconazole loaded in ordered mesoporous silica

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Science China chemistry 2015年第3期58卷 400-410页

作者： Xiao liu Shunai che State Key Laboratory of Metal Matrix Composites School of chemistry and chemical Engineering Shanghai Jiao Tong University

It is known that the energy of the amorphous state of itraconazole loaded in ordered mesoporous materials is high relative to that of the crystalline state and is responsible for enhanced solubility and dissolution rate. We investigated the effects of particle size(0.7–5μm), mesostructure(2D p6 mm, cubic Ia-3d and cubic Fm-3m) and pore size(2.2–15.4 nm) of mesoporous silicas on the release performance of itraconazole. Results indicated that the release performance was not influenced by the particle sizes tested here, that the release performance increased with increasing pore diameter due to the lower probability of drug molecules colliding to recrystallize in large pores, and that the release performance was decreased in the cage-type pore structure(Fm-3m) compared to that in the cylindrical pore structures(p6mm and Ia-3d) because of the small entrance to the cagelike pores that retards the drug release.

关键词： itraconazole poorly soluble enhanced release mesoporous silica

高聚物-纤维复合改良砂土的强度特性与变形机理

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建筑材料学报 2024年第8期27卷 744-756页

作者：黄庭伟刘瑾朱旭芬车文越孙梦雅河海大学地球科学与工程学院江苏南京211100

为改善砂土的不良工程特性并可用于河道岸坡、地基与道路加固,本文提出了一种使用高聚物和纤维复合改良砂土的方法.通过无侧限抗压强度试验和数值模拟,分析了改良砂土的强度特性及变形破坏模式.结果表明:复合使用高聚物和纤维能够有效... 详细信息

为改善砂土的不良工程特性并可用于河道岸坡、地基与道路加固,本文提出了一种使用高聚物和纤维复合改良砂土的方法.通过无侧限抗压强度试验和数值模拟,分析了改良砂土的强度特性及变形破坏模式.结果表明:复合使用高聚物和纤维能够有效提高砂土的抗压强度,且改良砂土的抗压强度随着高聚物和纤维掺量的增加而提高;改良砂土的最大抗压强度为414.53 kPa,纤维和高娶物最佳建议掺量分别为0.6%和4.0%;纤维加入后,在砂土中形成了力链网络,因此增加了应力传递的路径,有效地延缓了砂土内部微裂纹的发育;高聚物加入后,形成的膜状物与纤维交织在一起,形成一种新的网状结构,这显著提升了砂土的抗变形能力.

关键词：砂土改良复合材料破坏变形数值模拟改良机理

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基于肝与小儿少阳体质探究抽动障碍中医机制

中国中西医结合儿科学 2024年第3期16卷 265-269页

作者：刘英钟明秀宋邦国张迪江西中医药大学附属医院儿科南昌330006 江西中医药大学南昌330004

抽动障碍病起病于儿童和青少年时期,现代医学属于神经精神障碍性疾病。随着社会的发展,外界刺激的增加,本病病例亦有逐年上涨的趋势。当儿童发育处于生长时期,无不体现肝之特性,小儿体质符合肝的特性,肝气平和,肝血充足则正常发育;肝阳... 详细信息

抽动障碍病起病于儿童和青少年时期,现代医学属于神经精神障碍性疾病。随着社会的发展,外界刺激的增加,本病病例亦有逐年上涨的趋势。当儿童发育处于生长时期,无不体现肝之特性,小儿体质符合肝的特性,肝气平和,肝血充足则正常发育;肝阳过亢、肝阴不足或肝肾不相协调易使得肝风内动则可见抽动的症状表现。另外,对于外部刺激的处理失当,肝气郁滞,亦生内动之变。基于此,抓住肝的生理特性和小儿体质特点,探究二者之间的关系,以及肝与其他脏腑的联系,从肝和少阳体质关系的角度分析抽动障碍,以肝为主,五脏平调,内外并治,对于初发和久治不愈的疑难性抽动障碍治疗均具有一定的指导意义。

关键词：抽动障碍体质少阳儿童