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Petroleum Science 2024年第3期21卷 1474-1487页

作者： Shu-Heng Du yong-min shi State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China School of Earth and Space Sciences Peking UniversityBeijing100871China

In this study,a new image-based method for the extraction and characterization of pore-throat network for unconventional hydrocarbon storage and exploitation is proposed.“Pore-throat solidity”,which is analogous to particle solidity,and a new method for automatic identification of pores and throats in tight sandstone oil reservoirs are ***,the“pore-throat combination”and“pure pore”are defined and distinguished by drawing the cumulative probability curve of the pore-throat solidity and by selecting an appropriate cutoff *** the discrete grid set is recognized as a pore-throat combination,Legendre ellipse fitting and minimum Feret diameter are *** the pore and throat grid sets are identified as pure pores,the pore diameter can be directly *** the new method,the analytical results for the physical parameters and pore radius agree well with most prior *** results comparing the maximum ball and the new model could also prove the accuracy of the latter's in micro and nano *** new model provides a more practical theoretical basis and a new calculation method for the rapid and accurate evaluation of the complex processes of oil migration.

关键词： Hydrocarbon exploitation Pore Throat Porous media Identification

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结直肠癌中RCE1的表达及意义

现代医院 2018年第10期18卷 1494-1497,1502页

作者：周霖熊勇梁敏石波云深圳市光明新区人民医院广东深圳518106 广州医科大学附属第五医院广东广州510700

目的探讨Rce1在结直肠癌组织中的表达差异及意义。方法采用免疫组化方法(IHC)检测237例结直肠癌患者癌组织及其匹配癌旁组织中Rce1的表达情况;进一步分析Rce1的表达情况与患者临床因素及预后的关系。结果 Rce1主要表达于细胞浆中,结直... 详细信息

目的探讨Rce1在结直肠癌组织中的表达差异及意义。方法采用免疫组化方法(IHC)检测237例结直肠癌患者癌组织及其匹配癌旁组织中Rce1的表达情况;进一步分析Rce1的表达情况与患者临床因素及预后的关系。结果 Rce1主要表达于细胞浆中,结直肠癌中Rce1表达率为54. 9%(130/237),明显低于癌旁组织78. 9%(187/237)(P <0. 05)。Rce1低表达与血液中癌胚抗原(CEA)表达水平、肿瘤浸润深度、有无淋巴结转移、肿瘤分期明显相关,差异具有统计学意义(P <0. 05);低表达Rce1的患者总体生存率及无瘤生存率均下降,对II和III期患者的进一步分析也表明,低表达Rce1的患者预后较差。Cox多因素分析结果显示Rce1是影响结直肠癌预后的独立危险因素(P <0. 05)。结论 Rce1在结直肠癌组织中表达缺失,且分析显示其表达缺失与结直肠癌侵袭性明显相关,低表达Rce1是患者预后不良的独立危险因素。

关键词： Rce1 结直肠癌免疫组化预后

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第1期 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-Song Yang Fu-min Zhang Ai-Jun Ma Bao Du yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

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DOUBLE POINTS SITE-SPECIFIC MUTATION OF A GENE FOR α-HUMAN CALCITONIN GENE RELATED PEPTIDE

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Chinese Science Bulletin 1989年第20期34卷 1758-1758页

作者：杨迪闵永洁施文陈晖王启松 Institute of Genetics Fudan University Shanghai Shanghai Institute of Biological Products

Oligonucleotide directed mutagenesis is one of the fundamental methods in the study of protein engineering. The methods previously described have their own drawbacks, for instance, they are time-consuming and can only... 详细信息

关键词： consuming instance mutagenesis directed mutation annealing DNA saving Polymerase 代军

3D Printing of Tough Hydrogel Scaffolds with Functional Surface Structures for Tissue Regeneration

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Nano-Micro Letters 2025年第2期17卷 18-45页

作者： Ke Yao Gaoying Hong Ximin Yuan Weicheng Kong Pengcheng Xia Yuanrong Li Yuewei Chen Nian Liu Jing He Jue shi Zihe Hu Yanyan Zhou Zhijian Xie yong He State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Liangzhu Laboratory Zhejiang UniversityHangzhou 310027People’s Republic of China Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province College of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Stomatology Hospital School of StomatologyZhejiang University School of MedicineHangzhou 310027People’s Republic of China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001People’s Republic of China Institute of Digital Medicine Nanjing First HospitalNanjing Medical UniversityNanjing 210006People’s Republic of China

Hydrogel scaffolds have numerous potential applications in the tissue engineering ***,tough hydrogel scaffolds implanted in vivo are seldom reported because it is difficult to balance biocompatibility and high mechanical *** by Chinese ramen,we propose a universal fabricating method(printing-P,training-T,cross-linking-C,PTC&PCT)for tough hydrogel scaffolds to fill this ***,3D printing fabricates a hydrogel scaffold with desired structures(P).Then,the scaffold could have extraordinarily high mechanical properties and functional surface structure by cycle mechanical training with salting-out assistance(T).Finally,the training results are fixed by photo-cross-linking processing(C).The tough gelatin hydrogel scaffolds exhibit excellent tensile strength of 6.66 MPa(622-fold untreated)and have excellent ***,this scaffold possesses functional surface structures from nanometer to micron to millimeter,which can efficiently induce directional cell ***,this strategy can produce bionic human tissue with mechanical properties of 10 kPa-10 MPa by changing the type of salt,and many hydrogels,such as gelatin and silk,could be improved with PTC or PCT *** experiments show that this scaffold can effectively promote the new generation of muscle fibers,blood vessels,and nerves within 4 weeks,prompting the rapid regeneration of large-volume muscle loss injuries.

关键词： 3D printing Tough hydrogel scaffold Functional surface structure Tissue regeneration Biomaterials

Identification of a dual functional betulinic acid analog for the treatment of osteoarthritis by phenotypic screening

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Science China Life Sciences 2025年第1期 300-302页

作者： Ze-min Lin Mai Xiang Wen-Hui Wei Shu-Hui Fan Li Chen Jie Wang Xiao-Qian Yang Chun-Hao Yang shi-Jun He Jian-Ping Zuo Laboratory of Immunopharmacology State Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy of Sciences School of Pharmacy University of Chinese Academy of Sciences School of Pharmacy Nanjing University of Chinese Medicine State Key Laboratory of Drug Research Department of Medicinal ChemistryShanghai Institute of Materia MedicaChinese Academy of Sciences Innovation Research Institute of Traditional Chinese Medicine Shanghai University of Traditional Chinese Medicine Experiment Center for Science and Technology Shanghai University of Traditional Chinese Medicine

Dear Editor, Phenotypic drug discovery, which observes compound effects on physiology,has given way to targeting specific molecules, but has revived by using modern methods to find drugs based on therapeutic outcomes in disease models(Vincent et al., 2022). Osteoarthritis(OA) is a prevalent chronic joint disorder, primarily affecting knee joints, with osteoclast activation due to low-grade inflammation resulting in increased bone resorption and structural changes in the joint(Katz et al.,2021).

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锗锡浓度对硅锗锡合金性能影响的研究

原子与分子物理学报 2025年第5期42卷 163-174页

作者：顾永顺温淑敏内蒙古工业大学理学院呼和浩特010051

由于SiGeSn合金材料其具有高的载流子迁移率和较长的载流子寿命,并且其结构具有较高的热力学稳定性,所以在光电子领域中是一种具有非常大应用潜力的半导体材料.本文采用密度泛函理论中的广义梯度近似GGA+U的方法,构建并计算了本征半导体... 详细信息

由于SiGeSn合金材料其具有高的载流子迁移率和较长的载流子寿命,并且其结构具有较高的热力学稳定性,所以在光电子领域中是一种具有非常大应用潜力的半导体材料.本文采用密度泛函理论中的广义梯度近似GGA+U的方法,构建并计算了本征半导体Si_(96)与五组掺杂模型Si_(92)Ge_(2)Sn_(2)、Si_(88)Ge_(4)Sn_(4)、Si_(84)Ge_(6)Sn_(6)、Si_(80)Ge_(8)Sn_(8)、Si_(76)Ge_(10)Sn_(10)的电子结构及光学性质.通过对计算结果的分析可知,Ge,Sn的加入使得Si材料的带隙宽度减小,并且发生了由间接带隙向直接带隙的转变;Ge,Sn浓度最高的SiGeSn合金的形成能相对较高,稳定性相较于Ge,Sn含量低的材料较差;随着Ge,Sn掺杂浓度的提高,电子态密度图显示出越来越明显的杂化现象,并且态密度的峰值主要有Si原子的s轨道提供;Ge,Sn浓度的提高还使得SiGeSn合金的吸收系数在可见光及近红外区域内增加、反射率在可见光及以上波段范围内提高、折射率变低、消光系数曲线向红外区域移动等光学性质变化,表明可以通过调节Ge,Sn浓度来获得合适的光学特性,这为SiGeSn半导体在红外区域光电材料和器件的应用上提供了研究方向.

关键词： SiGeSn 电子特性光学性质

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Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent LiCoO_(2)cathode material

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International Journal of minerals,Metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie shi Changle Hou Jingjing Dong Dong Chen Jianzhong Li Key Laboratory for Ecological Metallurgy of Multimetallic mineral(ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(LIBs),properly recycling spent LIBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of LIB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to LiCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/LiCoO_(2)mass ratio of 3:1,the leaching efficiency of Li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in LiCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of LIB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

实时荧光定量RT-PCR检测白血病细胞WT1 mRNA方法的建立

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实用肿瘤杂志 2003年第5期18卷 371-374页

作者：沈红强汤永民杨世隆宋华石淑文徐卫群钱伯芹浙江大学医学院附属儿童医院白血病实验室浙江杭州310003

目的　建立实时荧光定量 RT-PCR检测白血病细胞 WT1m RNA的方法。方法　在 PCR反应体系中加入了一条与靶基因序列互补的寡核苷酸双荧光标记探针 (5′端为荧光报告基团 ,3′端为荧光淬灭基团 ) ,建立实时荧光定量 RT-PCR检测白血病细胞 W... 详细信息

目的　建立实时荧光定量 RT-PCR检测白血病细胞 WT1m RNA的方法。方法　在 PCR反应体系中加入了一条与靶基因序列互补的寡核苷酸双荧光标记探针 (5′端为荧光报告基团 ,3′端为荧光淬灭基团 ) ,建立实时荧光定量 RT-PCR检测白血病细胞 WT1m RNA的方法 ,并测试其特异性及敏感性。结果　所建立的实时荧光定量 RT-PCR检测 WT1m RNA的方法具有很好的准确性 ,检测 WT1m RNA的灵敏度达 10 - 4。方法的变异系数为1.93 % ,稳定性较好。循环阈值与 PCR体系中起始模板量的对数值之间有着良好的线性关系 (斜率为 -3 .5,线性相关系数 r=0 .997) ,可对 WT1m RNA的表达进行准确定量分析。结论　实时荧光定量 RT-PCR检测白血病细胞WT1m RNA的方法具有很好的特异性和敏感性 ,且操作简便、安全。

关键词：实时荧光定量RT-PCR 检测白血病癌基因 Wilms肿瘤基因基因表达

A new approach to the synthesis of N-monosubstituted aniline and its derivatives viaβ-cyclodextrin host-guest complexes

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Chinese Chemical Letters 2008年第10期19卷 1139-1142页

作者： min Zhang yong Gao Rong Zu Hu Zhen shi College of Chemistry and Materials Science Fujian Normal University Fuzhou 350007 China Department of Chemistry Northwest University Xi＇an 710069 China Xi＇an Modern Chemistry Research Institute Xi＇an 710065 China

A novel method for the synthesis of N-monosubstituted aniline and its derivatives via β-cyclodextrin （CD） host-guest complexes has been presented. The mild reaction gives the title compounds with high selectivity i... 详细信息

关键词： β-Cyclodextrin Catalyst Inclusion compounds