检索结果-南通市图书馆

生物学教学 2024年第3期49卷 92-93页

作者：魏凤国辽宁省实验中学东戴河分校葫芦岛125208

列举了“动物体细胞核移植技术和克隆动物”一节中的几个问题,结合文献对这些问题进行解释,以期为教学提供参考。

关键词：细胞核移植克隆动物问题解释

来自草原的呼唤--评娅伦·格日勒与内蒙古少年合唱团音乐会

在线全文

学校读者我要写书评

暂无评论

人民音乐 2024年第1期 24-27页

作者：魏佳怡中央音乐学院音乐学系

2023年8月4日至8月20日,国家大剧院的“八月合唱节”如期与观众见面,本届合唱节以“声生和鸣”为主题,为观众们呈现了13场风格各异并具有高艺术水准的合唱音乐会。其中,8月15日“白云飘落的地方--娅伦·格日勒与内蒙古少年合唱团音乐会... 详细信息

2023年8月4日至8月20日,国家大剧院的“八月合唱节”如期与观众见面,本届合唱节以“声生和鸣”为主题,为观众们呈现了13场风格各异并具有高艺术水准的合唱音乐会。其中,8月15日“白云飘落的地方--娅伦·格日勒与内蒙古少年合唱团音乐会”的成功举办,使观众们仿佛置身于一望无垠的草原上,聆听到来自远方的呼唤。

关键词：国家大剧院艺术水准合唱团音乐会成功举办内蒙古风格各异草原

维普期刊数据库博看期刊

Effects of diamagnetic drift on nonlinear interaction between multi-helicity neoclassical tearing modes

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第6期33卷 452-458页

作者：王海源姜帅刘桐魏来栾其斌王正汹 Key Laboratory of Materials Modification by Laser Ionand Electron Beams of the Ministry of EducationSchool of PhysicsDalian University of TechnologyDalian 116024China Faculty of Electronic Information and Electrical Engineering Dalian University of TechnologyDalian 116024China

A numerical study of the diamagnetic drift effect on the nonlinear interaction between multi-helicity neoclassical tearing modes(NTMs) is carried out using a set of four-field equations including two-fluid *** results show that,in contrast to the single-fluid case,5/3 NTM cannot be completely suppressed by 3/2 NTM with diamagnetic drift *** modes exhibit oscillation and coexist in the saturated *** better understand the effect of the diamagnetic drift flow on multiple-helicity NTMs,the influence of typical relevant parameters is *** is found that the average saturated magnetic island width increases with increasing bootstrap current fraction f_(b) but decreases with the ion skin depth δ.In addition,as the ratio of parallel to perpendicular transport coefficients χ_(‖)/χ_(⊥) increases,the average saturated magnetic island widths of the 3/2 and 5/3 NTMs *** underlying mechanisms behind these observations are discussed in detail.

关键词： tokamak two-fluid neoclassical tearing modes multi-helicity

不同脂肪源对草鱼生长性能及血液生化指标的影响

在线全文

学校读者我要写书评

暂无评论

中国饲料 2024年第2期 59-62页

作者：仲惟三门峡职业技术学院河南三门峡472000 河南科技大学应用工程学院河南三门峡472000

本试验将不同脂肪源添加到草鱼日常饲料中,研究对其生长性能和血液生化指标的影响。试验将450尾草鱼平均分为5组,分别添加鱼油、猪油、豆油、玉米油和混合油为脂肪源,试验为期30d。结果表明,与对照组相比,在日粮中添加不同种类的脂肪源... 详细信息

本试验将不同脂肪源添加到草鱼日常饲料中,研究对其生长性能和血液生化指标的影响。试验将450尾草鱼平均分为5组,分别添加鱼油、猪油、豆油、玉米油和混合油为脂肪源,试验为期30d。结果表明,与对照组相比,在日粮中添加不同种类的脂肪源对草鱼末重、增重率有显著影响(P <0.05),其中添加玉米油为脂肪源的试验组对提高草鱼生长性能效果最显著,草鱼平均增重率比对照组显著提高12.23%(P <0.05);其次,在日粮中添加不同种类的脂肪源对草鱼鱼体营养成分也有显著影响(P <0.05),添加玉米油脂肪源的试验组肌肉蛋白指标与对照组相比差异最显著,比对照组显著提高7.16%(P <0.05)。最后,在日粮中添加不同水平的脂肪源对草鱼血清中IgA、IgG、IgM等免疫指标均有显著影响(P <0.05),其中添加玉米油脂肪源的试验组血清免疫指标与对照组相比差异最显著,IgA、IgG、IgM分别提高了17.7%、20.9%和36.8%(P <0.05)。本试验结果表明,在日粮中添加5%玉米油作为脂肪源,对草鱼的促生长效果最显著,可使草鱼的增重及鱼体肌肉蛋白含量最高。

关键词：脂肪源草鱼生长性能生化指标

发育完全停滞的体外受精胚胎线粒体DNA突变研究

在线全文

学校读者我要写书评

暂无评论

陆军军医大学学报 2024年第5期46卷 477-483页

作者：姚欣怡王伟王启航阮卓琳游艳琴赵勇钟威商微解放军总医院妇产科北京100853 解放军总医院第七医学中心妇产科医学部北京100700 解放军总医院第一医学中心妇产科北京100853

目的通过探究不明原因早期胚胎发育全部停滞患者线粒体基因的特异性突变。方法本研究为病例对照研究。收集2021年5月至2022年11月就诊我院的不孕不育女性患者共计46人,均进行外周血全外显子测序及线粒体基因突变检测。经筛选纳入研究... 详细信息

目的通过探究不明原因早期胚胎发育全部停滞患者线粒体基因的特异性突变。方法本研究为病例对照研究。收集2021年5月至2022年11月就诊我院的不孕不育女性患者共计46人,均进行外周血全外显子测序及线粒体基因突变检测。经筛选纳入研究组10人,为全部胚胎发育停滞患者;对照组15人,为具有3个以上可移植胚胎的患者,所有入组病例夫妻双方未见染色体异常。统计2组患者临床基线数据、胚胎发育情况,比较2组患者线粒体基因突变位点及其定位基因情况,并对特异性突变位点/基因进行功能注释。结果研究组发现5个特异线粒体突变位点,分别为:MT-16172(T>C)、MT-12882(C>T)、MT-12406(G>A)、MT-10609(T>C)、MT-16129(G>A)。这些突变点均位于线粒体呼吸链复合物基因和线粒体基因调控区。结论 5个线粒体基因特异性突变位点[MT-16172(T>C)、MT-12882(C>T)、MT-12406(G>A)、MT-10609(T>C)、MT-16129(G>A)]可能与不明原因早期胚胎发育停滞相关。

关键词：胚胎发育生殖技术线粒体基因突变 D-loop环

Measurement of 2p-3d absorption in a hot molybdenum plasma

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第4期9卷 68-79页

作者： Gang Xiong Bo Qing Zhiyu Zhang Longfei Jing Yang Zhao Minxi wei Yimeng Yang Lifei Hou Chengwu Huang Tuo Zhu Tianming Song Min Lv Yan Zhao Yuxue Zhang Guohong Yang Zeqing Wu Jun Yan Yaming Zou Jiyan Zhang Jiamin Yang Shanghai EBIT Laboratory and Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE)Institute of ModernPhysicsFudan UniversityShanghai 200433China Laser Fusion Research Center China Academy of Engineering PhysicsMianyang 621900China Institute of Applied Physics and Computational Mathematics Beijing 100088China

We present measurements of the 2p-3d transition opacity of a hot molybdenum-scandium sample with nearly half-vacant molybdenum M-shell configurations.A plastic-tamped molybdenum-scandium foil sample is radiatively heated to high temperature in a compact D-shaped gold Hohlraum driven by∼30 kJ laser energy at the SG-100 kJ laser facility.X rays transmitted through the molybdenum and scandium plasmas are diffracted by crystals and finally recorded by image *** electron temperatures in the sample in particular spatial and temporal zones are determined by the K-shell absorption of the scandium plasma.A combination of the IRAD3D view factor code and the MULTI hydrodynamic code is used to simulate the spatial distribution and temporal behavior of the sample temperature and *** inferred temperature in the molybdenum plasma reaches a average of 138±11 eV.A detailed configuration-accounting calculation of the n=2–3 transition absorption of the molybdenum plasma is compared with experimental measurements and quite good agreement is *** present measurements provide an opportunity to test opacity models for complicated M-shell configurations.

关键词： molybdenum absorption configuration

Enabling an Inorganic-Rich Interface via Cationic Surfactant for High-Performance Lithium Metal Batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第8期16卷 1-17页

作者： Zejun Sun Jinlin Yang Hongfei Xu Chonglai Jiang Yuxiang Niu Xu Lian Yuan Liu Ruiqi Su Dayu Liu Yu Long Meng Wang Jingyu Mao Haotian Yang Baihua Cui Yukun Xiao Ganwen Chen Qi Zhang Zhenxiang Xing Jisheng Pan Gang Wu wei Chen Department of Chemistry National University of Singapore3 Science Drive 3Singapore 117543Singapore Agency for Science Technology and Research(A*STAR)Institute of High-Performance Computing1 Fusionopolis Way#16‑16 ConnexisSingapore 138632Singapore Department of Physics National University of Singapore2 Science Drive 3Singapore 117542Singapore Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207People’s Republic of China Agency for Science Technologyand Research(A*STAR)Institute of Materials Research and EngineeringInnovis2 Fusionopolis Way#08‑03Singapore 138634Singapore

An anion-rich electric double layer(EDL)region is favorable for fabricating an inorganic-rich solid-electrolyte interphase(SEI)towards stable lithium metal anode in ester ***,cetyltrimethylammonium bromide(CTAB),a cationic surfactant,is adopted to draw more anions into EDL by ionic interactions that shield the repelling force on anions during lithium *** situ electrochemical surface-enhanced Raman spectroscopy results combined with molecular dynamics simulations validate the enrichment of NO_(3)^(−)/FSI−anions in the EDL region due to the positively charged CTA^(+).In-depth analysis of SEI structure by X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry results confirmed the formation of the inorganic-rich SEI,which helps improve the kinetics of Li^(+)transfer,lower the charge transfer activation energy,and homogenize Li *** a result,the Li||Li symmetric cell in the designed electrolyte displays a prolongated cycling time from 500 to 1300 h compared to that in the blank electrolyte at 0.5 mA cm^(-2) with a capacity of 1 mAh cm^(-2).Moreover,Li||LiFePO_(4) and Li||LiCoO_(2) with a high cathode mass loading of>10 mg cm^(-2) can be stably cycled over 180 cycles.

关键词： Cationic surfactant Lithium nitrate additive Solid-electrolyte interphase Electric double layer Lithium metal batteries

αExtractor: a system for automatic extraction of chemical information from biomedical literature

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第3期67卷 618-621页

作者： Jiacheng Xiong Xiaohong Liu Zhaojun Li Hongzhong Xiao Guangchao Wang Zhenjiang Niu Chaoyuan Fei Feisheng Zhong Gang Wang wei Zhang Zunyun Fu Zhiguo Liu Kaixian Chen Hualiang Jiang Mingyue Zheng Drug Discovery and Design Center State Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China AI Department Suzhou Alphama Biotechnology Co.Ltd.Suzhou 215125China College of Computer and Information Engineering Dezhou UniversityDezhou 253023China

Dear Editor,Great progress has been made using artificial intelligence(AI) techniques in learning knowledge from biomedical databases in recent years, revolutionizing the study of many fields, such as protein structure prediction and protein design(Madani et al., 2023). However, there is massive biomedical knowledge not curated in the form of structured data but hidden in primary scientific literature.

关键词： has such knowledge

Bifurcation analysis and control study of improved full-speed differential model in connected vehicle environment

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第7期33卷 245-266页

作者：艾文欢雷正清李丹洋方栋梁刘大为 College of Computer Science and Engineering Northwest Normal UniversityLanzhou 730070China College of Electrical Engineering Lanzhou Institute of TechnologyLanzhou 730050China

In recent years, the traffic congestion problem has become more and more serious, and the research on traffic system control has become a new hot spot. Studying the bifurcation characteristics of traffic flow systems and designing control schemes for unstable pivots can alleviate the traffic congestion problem from a new perspective. In this work, the full-speed differential model considering the vehicle network environment is improved in order to adjust the traffic flow from the perspective of bifurcation control, the existence conditions of Hopf bifurcation and saddle-node bifurcation in the model are proved theoretically, and the stability mutation point for the stability of the transportation system is found. For the unstable bifurcation point, a nonlinear system feedback controller is designed by using Chebyshev polynomial approximation and stochastic feedback control method. The advancement, postponement, and elimination of Hopf bifurcation are achieved without changing the system equilibrium point, and the mutation behavior of the transportation system is controlled so as to alleviate the traffic congestion. The changes in the stability of complex traffic systems are explained through the bifurcation analysis, which can better capture the characteristics of the traffic flow. By adjusting the control parameters in the feedback controllers, the influence of the boundary conditions on the stability of the traffic system is adequately described, and the effects of the unstable focuses and saddle points on the system are suppressed to slow down the traffic flow. In addition, the unstable bifurcation points can be eliminated and the Hopf bifurcation can be controlled to advance, delay, and disappear,so as to realize the control of the stability behavior of the traffic system, which can help to alleviate the traffic congestion and describe the actual traffic phenomena as well.

关键词： bifurcation analysis vehicle queuing bifurcation control Hopf bifurcation

同方期刊数据库

Design and prototyping of the readout electronics for the transition radiation detector in the high energy cosmic radiation detection facility

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第4期35卷 189-199页

作者： Jie-Yu Zhu Yang-Zhou Su Hai-Bo Yang Fen-Hua Lu Yan Yang Xi-Wen Liu Ping wei Shu-Cai Wan Hao-Qing Xie Xian-Qin Li Cong Dai Hui-Jun Hu Hong-Bang Liu Shu-Wen Tang Cheng-Xin Zhao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

The high energy cosmic-radiation detection(HERD)facility is planned to launch in 2027 and scheduled to be installed on the China Space *** serves as a dark matter particle detector,a cosmic ray instrument,and an observatory for high-energy gamma rays.A transition radiation detector placed on one of its lateral sides serves dual purpose,(ⅰ)calibrating HERD's electromagnetic calorimeter in the TeV energy range,and(ⅱ)serving as an independent detector for high-energy gamma *** this paper,the prototype readout electronics design of the transition radiation detector is demonstrated,which aims to accurately measure the charge of the anodes using the SAMPA application specific integrated circuit *** electronic performance of the prototype system is evaluated in terms of noise,linearity,and *** the presented design,each electronic channel can achieve a dynamic range of 0–100 fC,the RMS noise level not exceeding 0.15 fC,and the integral nonlinearity was<0.2%.To further verify the readout electronic performance,a joint test with the detector was carried out,and the results show that the prototype system can satisfy the requirements of the detector's scientific goals.

关键词： HERD Dark matter particle detection TRD Readout electronics SAMPA Data acquisition Performance test