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Observation of the ^1S0-^3P0 optical clock transition in cold ^199Hg atoms

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Chinese Optics Letters 2018年第6期16卷 6-10页

作者： Xiaohu Fu Su Fang Ruchen Zhao Ye Zhang Junchao Huang Jianfang Sun Zhen Xu yuzhu wang Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China Key Laboratory of Quantum Optics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049 China Center of Cold Atom Physics Chinese Academy of Sciences Shanghai 201800 China

We report on the observation of the highly forbidden ^1S0–^3P0 optical clock transition in laser-cooled ^199Hg *** than 95% depletion of cold ^199Hg atoms is detected in the magneto-optical trap. Using the free-of-field detection method, the AC Stark shift from the cooling laser is removed from the in-field spectroscopy. At low-power clock laser pumping, the linewidth of the clock spectroscopy is approximately 450 k Hz（full width at half-maximum）, which corresponds to a Doppler broadening at the atom temperature of 60 μK. We determine the -1S0–^13P0transition frequency to be 1,128,575,290.819（14） MHz by referencing with a hydrogen maser and measuring with a fiber optical frequency comb. Moreover, a weak Doppler-free signal is observed.

关键词： Stark AC optical clock transition in cold Hg atoms Observation of the MOT AOM

A NEW METHOD OF ISOTOPE SEPARATION BY MEANS OF LASER DEFLECTION OF AN ATOMIC BEAM

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Chinese Physics Letters 1986年第11期3卷 497-500页

作者： LIU Liang wang yuzhu Shanghai Institute of Optics and Fine Mechanics Academia SinicaShanghai

The radiation pressure produced by two-laser fields on a two-level atom is *** results show that the radiation pressure produced by two-laser fields with appropriate detunings with atom is much greater than that produced by a single-laser *** great radiation pressure is possible to be applied to isotope separation by laser deflection of an atomic beam.

关键词： field. beam. LASER

High room-temperature magnetization in Co-doped TiO_(2) nanoparticles promoted by vacuum annealing for different durations

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Journal of Semiconductors 2021年第7期42卷 71-77页

作者： Wenqiang Huang Rui Lin Weijie Chen yuzhu wang Hong Zhang College of Mechanical and Electrical Engineering Fujian Agriculture and Forestry UniversityFuzhou 350002China

To clarify the contribution of oxygen vacancies to room-temperature ferromagnetism(RTFM)in cobalt doped TiO_(2)(Co-TiO_(2)),and in order to obtain the high level of magnetization suitable for spintronic devices,in this work,Co-TiO_(2) nano-particles are prepared via the sol-gel route,followed by vacuum annealing for different durations,and the influence of vacu-um annealing duration on the structure and room-temperature magnetism of the compounds is *** results reveal that with an increase in annealing duration,the concentration of oxygen vacancies rises steadily,while the saturation magnetiza-tion(Ms)shows an initial gradual increase,followed by a sharp decline,and even *** maximum Ms is as high as 1.19 emu/g,which is promising with respect to the development of spintronic *** analysis reveals that oxygen va-cancies,modulated by annealing duration,play a critical role in tuning room-temperature *** appropriate concentra-tion of oxygen vacancies is beneficial in terms of promoting RTFM in Co-TiO_(2).However,excessive oxygen vacancies will result in a negative impact on RTFM,due to antiferromagnetic superexchange interactions originating from nearest-neighbor Co^(2+)ions.

关键词： Co-doped TiO_(2)nanoparticles room-temperature ferromagnetism different annealing duration oxygen vacancy high magnetization

水热因子影响果实品质的研究进展及其对栽培的启示

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园艺学报 2019年第9期46卷 1681-1690页

作者：王玉柱北京市林业果树科学研究院北京市落叶果树工程技术研究中心北京林果业生态环境功能提升协同创新中心国家林业和草原局杏工程技术研究中心北京100093

综述了近年来水、热因子影响水果品质的主要研究进展,并通过对比国内外果树产区的水热环境因子,分析了当前制约中国部分地区水果品质提升的关键因素,提出了在栽培措施上进行改进以提升果实品质的新思路。

关键词：果树水分温度果实品质栽培措施

The Effect of Repumping Light on Loading and Collision Loss in MOT

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Chinese Journal of Lasers 1997年第5期B6卷 409-418页

作者： LIU Xunming LIN Yueming ZHOU Shanyu HONG Tao wang yuzhu (Laboratory for Quantum Optics, Shanghai Indicute of Optics and Fine Mechanics,Chinese Academy of Sciences, Shanghai 201800, China) Shanghai Inst of Optics and Fine Mechanics Chinese Acad of Sciences Shanghai China

The maechanism of loading and collision loss in magneto-optical trap has discussed. The Doppler forces and population distribution in excited and ground states were calculated using 1-dimensional multi-level system including σ+－σ－trapping and repumping lights. To avoid collision loss and get effective damping force we discussed the optimal intensity and detuning ranges of repumping light. The experimental loading curves were derived.

关键词： magneto-optical trap loading and collision loss Doppler force

宝鸡地区鼻咽癌患者HPV感染状态与预后探究

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临床医学研究与实践 2024年第26期9卷 34-37页

作者：李晓花何纪恩朱勇靳娟陈敏利郭辉王雨竹宝鸡市中医医院放疗科陕西宝鸡721000 宝鸡市中心医院肿瘤外科陕西宝鸡721008 宝鸡市中心医院放疗科陕西宝鸡721008 宝鸡市中心医院病理科陕西宝鸡721008

目的探讨宝鸡地区鼻咽癌患者人乳头瘤病毒(HPV)感染情况,分析HPV感染与鼻咽癌预后的关系。方法收集2011年7月至2022年12月宝鸡市中心医院收治的经病理检查确诊为鼻咽癌的59例患者作为研究对象。使用p16蛋白Envision法检测HPV感染情况;... 详细信息

目的探讨宝鸡地区鼻咽癌患者人乳头瘤病毒(HPV)感染情况,分析HPV感染与鼻咽癌预后的关系。方法收集2011年7月至2022年12月宝鸡市中心医院收治的经病理检查确诊为鼻咽癌的59例患者作为研究对象。使用p16蛋白Envision法检测HPV感染情况;分析鼻咽癌标本中p16蛋白阳性表达情况;比较p16蛋白阳性与阴性患者的临床特征及生存情况。结果59例鼻咽癌标本中,30例p16蛋白表达阳性,阳性率为50.8%。p16蛋白阳性、阴性鼻咽癌患者的性别、年龄、吸烟与饮酒情况、T分期、N分期及病理学分型比较,差异无统计学意义(P>0.05)。p16蛋白阳性与阴性患者的3年总体生存率(OS)分别为86.0%和68.7%,5年OS分别为81.2%和58.9%,p16蛋白阳性患者的OS略高于阴性患者,但差异无统计学意义(P>0.05);p16蛋白阳性与阴性患者的3年无病生存率(DFS)分别是81.5%和55.1%,p16蛋白阳性患者的DFS高于阴性患者(P<0.05)。结论宝鸡地区HPV感染率较低,HPV阳性患者的生存期长于HPV阴性患者。

关键词：鼻咽癌人乳头瘤病毒免疫组织化学技术

Theoretical Analyses and ExperimentalDemonstration of Coherent Splittingof Atomic Wave Packet

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Chinese Journal of Lasers 1997年第1期B6卷 29-38页

作者： XU Xinye ZHOU Shanyu HUO Yunzheng Li Fosheng wang yuzhu(Joint Laboratory for quantum Optics,Shanghai Institute of Optics and fine Mechanics,Chinese Academy of Sciences,Shanghai 201800) Shanghai Inst of Optics and Fine Mechanics Chinese Acad of Sciences Shanghai China

A new method of realizing coherent split of atomic wave packet has been presented in this paper. Due to using Doppler effect and stimulated Raman transition, it Can be applied directly in thermal atomic beam and only needs a single-frequency standing wave laser field. Theoretical analyses show that of both atoms and light field meet some conditions, atomic wave packet will be split coherently after interaction. Finally,the experiment of the atomic beam splitter by using this method is described. The results are in good agreement with the theoretical predication.

关键词： stimulated Raman transition coherent superpostion state coherent splitting of atomic wave packet atomic beam splitter

The construction and optimization of engineered yeast chassis for efficient biosynthesis of 8-hydroxygeraniol

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mLife 2023年第4期2卷 438-449页

作者： Yu Zhang Mengdi Yuan Xinxin Wu Qiuhui Zhang yuzhu wang Liming Zheng Tsan-Yu Chiu Huiming Zhang Lei Lan Feng wang Ying Liao Xuemei Gong Shirui Yan Yun wang Yue Shen Xian Fu BGI Research ShenzhenChina BGI Research HangzhouChina Guangdong Provincial Key Laboratory of Genome Read and Write BGI ResearchShenzhenChina BGI Research ChangzhouChina

Microbial production of monoterpenoid indole alkaloids(MIAs)provides a sustainable and eco-friendly means to obtain compounds with high pharmaceutical ***,efficient biosynthesis of MIAs in heterologous microorganisms is hindered due to low supply of key precursors such as geraniol and its derivative 8-hydroxygeraniol catalyzed by geraniol 8-hydroxylase(G8H).In this study,we developed a facile evolution platform to screen strains with improved yield of geraniol by using the SCRaMbLE system embedded in the Sc2.0 synthetic yeast and confirmed the causal role of relevant genomic *** genome mining,we identified several G8H enzymes that perform much better than the commonly used CrG8H for 8-hydroxygeraniol production in *** further showed that the N-terminus of these G8H enzymes plays an important role in cellular activity by swapping ***,the combination of the engineered chassis,optimized biosynthesis pathway,and utilization of G8H led to the final strain with more than 30-fold improvement in producing 8-hydroxygeraniol compared with the starting ***,this study will provide insights into the construction and optimization of yeast cells for efficient biosynthesis of 8-hydroxygeraniol and its derivatives.

关键词： 8-hydroxygeraniol biosynthesis G8H SCRaMbLE synthetic yeast

Laser Cooling and Trapping of Sodium Atoms in Magneto-optical Trap

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Chinese Journal of Lasers 1996年第6期B5卷 511-515页

作者： LIU Xunming LIN Yueming ZHOU Shanyu HUO Yunsheng wang yuzhu (Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences 201800, China) Shanghai Inst of Optics and Fine Mechanics Shanghai China

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关键词： laser cooling and trapping magneto-optical trap