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Large low-field reversible magnetocaloric effect in K_(3)Gd(PO_(4))_(2) at sub-Kelvin temperature

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Journal of Rare Earths 2024年第6期42卷 1087-1092,I0003页

作者： Haojie Wang Zhaojun Mo Jianjian Gong Heng Tu guochun zhang Jun Shen School of Rare Earths University of Science and Technology of ChinaHefei230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou341119China Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser TechnologyKey Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Department of Energy and PowerEngineering School of Mechanical EngineeringBeijing Institute of TechnologyBeijing100081China

We synthesized a potassium gadolinium phosphate K3Gd(PO_(4))_(2)with monoclinic structure(P2_(1/m))by the high-temperature solid-state reaction *** lattice constants obtained by Rietveld refinements of XRD curve are a=0.7411 nm,b=0.5624 nm,and c=0.9433 *** and magnetocaloric properties of K_(3)Gd(PO_(4))_(2)were investigated in *** magnetic phase transition temperature of K3Gd(PO_(4))2 was determined by ultra-low temperature testing to be 0.58 K.K_(3)Gd(PO_(4))2 exhibits large magnetic entropy changes(-ΔSM).The maximum-ΔSM are 20.2 and 29.4 J/(kg·K)in the magnetic field variation(ΔH)of 1 and 2 T,respectively,which are larger than that of the commercial Gd_(3)Ga_(5)O_(12)(GGG).The maximum adiabatic temperature change(ΔT_(ad))reaches 5.91 K under a magnetic field change(ΔH)of 1 T.K_(3)Gd(PO_(4))_(2)is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.

关键词： Ultra-low temperature Magnetocaloric effect Magnetic entropy change Magnetic refrigeration Rare earths

Phonon engineering in Yb:La_(2)CaB_(10)O_(19)crystal for extended lasing beyond the fluorescence spectrum

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Light(Science & Applications) 2023年第9期12卷 1921-1929页

作者： Yanling Cheng Fei Liang Dazhi Lu Jingcheng Feng guochun zhang Haohai Yu Huaijin zhang Yicheng Wu State Key Laboratory of Crystal Materials and Institute of Crystal Materials Shandong UniversityJinan 250100China Key Lab Functional Crystals and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Since the first invention of the laser in 1960,direct lasing outside the fluorescence spectrum is deemed impossible owing to the“zero-gain”***,when electron-phonon coupling meets laser oscillation,an energy modulation by the quantized phonon can tailor the electronic transitions,thus directly creating some unprecedented lasers with extended wavelengths by phonon ***,we demonstrate a broadband lasing(1000-1280 nm)in a Yb-doped La_(2)CaB_(10)O_(19)(Yb:LCB)crystal,far beyond its spontaneous fluorescence *** calculations and in situ Raman verify that such a substantial laser emission is devoted to the multiphonon coupling to lattice vibrations of a dangling“quasi-free-oxygen”site,with the increasing phonon numbers step-by-step(n=1–6).This new structural motif provides more alternative candidates with strong-coupling laser ***,the quantitative relations between phonon density distribution and laser wavelength extension are *** results give rise to the search for on-demand lasers in the darkness and pave a reliable guideline to study those intriguing electron-phonon-photon coupled systems for integrated photonic applications.

关键词： beyond lasing spectrum

Dendrochronology-based stand growth estimation of Larix olgensis forest in relation with climate on the eastern slope of Changbai Mountain, NE China

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Frontiers of Earth Science 2013年第4期7卷 429-438页

作者： Bo LIN Qianqian XU Wenhui LIU guochun zhang Qiongyao XU Qijing LIU Key Laboratory of Forest Cultivation Department of Forest Sciences Beijing Forestry University Beijing 100083 China

The eastern slope of Changbai Mountain is characterized by pure larch forest （Larix olgensis） with little human disturbance. Response of tree growth to climate in this area remains unknown. Meanwhile, little is known about how climate variations affect the biomass increase which could be recognized as a three-dimensional tree growth index. The objective of this study is to investigate the climate effects on the radial and biomass growth of larch on eastem slope of Changbai Mountain. Tree-ring width chronologies and mean annual biomass increment were established using tree-ring data. We used correlation analysis and multiple regression analysis to explore the relationship between larch growth and climatic factors from 1957 to 2009. Results show that tree-ring growth and mean annual biomass increment were primarily and significantly affected by previous year climatic variables with slight difference among months. Temperatures were more consistently and strongly corre- lated to the chronologies and mean annual biomass increment than was precipitation. Temperature is the main factor limiting larch growth on Changbai Mountain and the ongoing climate warming may accelerate the growth of the species. The current stand biomass of the area was ***-1 and the annual stand biomass increment in 2009 was 2.91 ***-1. In conclusion, the old-growth forest in the study area is still accumulating carbon efficiently.

关键词： Larix olgensis tree ring climatic factors,biomass China

Hydrothermal Synthesis, Structure and Property of Transition Metal（Mn, Zn, Cd or Pb） Coordination Frameworks Using Quinoline-8-oxy-acetate Acid and Dicarboxylic Acid as Ligands

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Chemical Research in Chinese Universities 2015年第4期31卷 489-497页

作者： zhang guochun QIAO Chengfang LIANG Jiehui WEI Qing XIA Zhengqiang CHEN Sanping Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources College of Chemical Engineering and Modern Materials Shangluo University Shangluo 726000 P. R. China Key Laboratory of Synthetic and Natural Functional Molecule Chemistry Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710127 P. R. China

Five transition metal coordination compounds, [Mn2（8-qoac）E（bdc）（H2O）4]（1）（8-qoacH=quinoline-8-oxy- acetate acid, H2bdc=benzene-1,4-dicarboxylic acid）, [Zn4（8-qoac）4（bdc）2]n（2）, {[CdE（8-qoac）E（Hip）2（H2O）2]·（H2O）4}n（3）（H2ip=benzene-1,3-dicarboxylic acid）, [Pb3（8-qoac）2（bdc）1.5（HEO）Cl]n（4） and [Zn2（8-qoac）（8-ql）（bdc）]n （5）（8-Hql=8-hydroxyquinoline）, were synthesized by hydrothermal syntheses of metal salts with benzenedicarboxy- lic acid and 8-qoacH. Compound 1 possesses a discrete dimer bridged by bdc2- ligand. Compound 2 presents a 2D layer network constructed from bdc2- linkers and 1D infinite ribbons, in which Zn（II） centers are bridged by 8-qoac- with a tetradentate binding mode. Compound 3 displays a 1D zigzag chain, with adjacent chains further connected via extensive O-H…O hydrogen bonds to generate a 3D supramolecular structure. Compound 4 shows a 3D framework containing trinuclear lead secondary building units and bdc2- linkers, in which a new coordination mode of 8-qoac- ligand is observed. In compound 5, Zn（II） ions are simultaneously bridged by 8-qoac-, 8-ql- and bdc2- ligands to form tetranuclear zinc units, which are further interlinked by bdc2- linkers to yield a 2D wave-like layer. Based on intrali- gand（IL）（π-π＊） fluorescent emission, compounds 1--5 possess strong purple fluorescent emissions. In addition, the thermal stabilities of compounds 1--5 were studied.

关键词： Coordination compound Quinoline-8-oxy-acetate acid Crystal structure Photoluminescence property

Presence of circulating tumor cells is associated with metabolic-related variables in postoperative patients with early-stage breast cancer

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Chinese Journal of Cancer Research 2018年第3期30卷 340-350页

作者： Yumei Shi guochun zhang Yulei Wang Chongyang Ren Lingzhu Wen Wenzhen Zhu Xiaoqing Chen Ning Liao The Second School of Clinical Medicine Southern Medical University Department of Breast Cancer Cancer CenterGuangdong General Hospital and Guangdong Academy of Medical Sciences

Objective：Although circulating tumor cells（CTCs）have been well-established as promising prognostic biomarkers in both early breast cancer and metastatic settings,little is known regarding the prognostic relevance of CTCs in the long-term postoperative monitoring of patients with non-metastatic breast cancer（non-MBC）.In this study,we investigated the associations of CTCs with clinicopathological features and metabolic-related variables,such as obesity and ***：In this retrospective study,we recruited 264 patients with postoperative stage Ⅰ–Ⅲ breast cancer at Guangdong General Hospital from January 2009 to December *** prevalence and number of CTCs were assessed using the Cell Search System at a median time of 19.0 months[interquartile range（IQR）,7.8–33.0]after *** CTC assay results were correlated with the clinicopathological features and metabolic-related variables.A multivariate logistic regression analysis was performed to further determine the independent predictors of ***：CTCs were detected in 10.6%of all *** positive rate of CTCs in patients with infiltrating ductal carcinoma was lower than that in patients with other pathological types（9.0%vs.28.6%,P=0.020）.More importantly,the presence of CTCs was correlated with blood glucose level（P=0.015）and high-density lipoprotein level（P=0.030）.The multivariate logistic regression analysis showed that the pathological type[odds ratio（OR）：1.757,95%CI：1.021–3.023;P=0.042]and blood glucose level（OR：1.218,95%CI：1.014–1.465;P=0.035）were independent predictors of the presence of ***：This study revealed potential associations between CTCs and metabolic-related factors in Chinese patients with non-MBC and supports the hypothesis that metabolic dysfunction in breast cancer patients might influence the biological activity of metastatic breast cancer,leading to a higher prevalence of CTCs.

关键词： Breast cancer circulating tumor ceils hyperglycemia metabolic-related variables

Integrated sensing from the synergetic color change of the center/brush of cholesteric liquid crystal particles

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Science China Materials 2022年第9期65卷 2565-2577页

作者： Yuanyuan Shang Chenglin Zheng guochun zhang Dong Chen Jingxia Wang Lei Jiang CAS Key Laboratory of Bio-inspired Materials and Interfaces Sciences Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Center of Material Science and Optoelectronics Engineering School of Future TechnologiesUniversity of Chinese Academy of SciencesBeijing 100049China Ji Hua Laboratory Foshan 528000China Key Laboratory of Functional Crystals and Laser Technology of Chinese Academy of Sciences Key Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Institute of Process Equipment College of Energy EngineeringZhejiang UniversityHangzhou 310027China

Cholesteric liquid crystal(CLC)particles can adaptively respond to constant changes in external stimuli and thus are widely used in solvent-sensing,pattern fabrication,and *** studies discussed the color change at the center of the particles for various ***,few studies analyzed the color change of the brush structure of particles in response to various applications because of the complicated birefringence *** this paper,we present a novel integrated sensing system based on the synergetic color change from the center and the brush structure of CLC *** system provides abundant and additional sensing information relative to the traditional *** particles are prepared by mixing reactive mesogens,a reactive chiral dopant,a non-reactive LC molecule,and a photoinitiator by using a microfluidic device and subsequent *** CLC particles exhibit gorgeous color at the center and brush structure upon various solvent stimuli because of the Bragg reflection and the birefringence effect,which is explained by the possible color-changing mechanism introduced in this *** proof-of-concept applications,such color-changing polymer particles are demonstrated in multi-solvent-sensing detection and pattern *** study provides new insights into the development of stimuli-responsive advanced functional materials with tailorable nanostructures toward technological applications ranging from sensing to display.

关键词： cholesteric liquid crystal particles integrated-sensing center-brush structure synergetic color change

Growth, Thermophysical and Electrical Properties of CsB3O5 Crystal

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Growth, Thermophysical and Electrical Properties of CsB3O5 C...

中国晶体学会第五届全国会员代表大会暨学术大会（晶体生长分会场）

作者： Shanshan Liu guochun zhang Kai Feng Yicheng Wu Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser Technology Technical Institute of Physics and Chemistry Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

CsB3O5(CBO)is a new nonlinear optical *** possesses a relatively large effective nonlinear optical coefficient,a high laser damage threshold(26 GW/cm2 for 1.0 ns pulses at 1053nm),and a wide optical transparency range(167-3400 nm).CBO single crystals without scattering centers have been successfully grown from the Cs2O-B2O3-MoO3ternary system by the top-seeded solution growth *** suitable region for CBO crystal growth was

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适应时代要求推动人文社会科学科研体制创新

科学学与科学技术管理 2000年第10期21卷 18-20页

作者：张国春中国社会科学院

我国人文社会科学目前已形成了社会科学院系统、高校文科系统、党政部门系统、党校系统和军队等五大研究方面军.据教育部社政司的统计和中国社会科学院最近所作的调查,中国社会科学院拥有31个研究所和3个实体研究中心,现有专业人员2975... 详细信息

我国人文社会科学目前已形成了社会科学院系统、高校文科系统、党政部门系统、党校系统和军队等五大研究方面军.据教育部社政司的统计和中国社会科学院最近所作的调查,中国社会科学院拥有31个研究所和3个实体研究中心,现有专业人员2975名;1999年全国省级及中心城市社会科学院共有46个,专业人员5026名.1998全国高等文科院校共有815所,拥有教科人员233097名,其中高级人员64508名;设有研究机构1754个,专业人员7836人/年.1998年全国县以上政府部门研究机构298个,专业人员15014名.全国党校系统、军队系统也设有不少研究机构,教研人员数万名.全国五大系统的专职人员在3万人以上,从事教研工作的人员在30万以上.充分发掘这支规模庞大的智力资源,对我国社会主义现代化建设具有重要意义.

关键词：人文社会科学社会科学研究机构创新

Elevated expression level of laminin 5 may be a negative predictive factor for the response to gefitinib in lung cancer patients

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The Chinese-German Journal of Clinical Oncology 2008年第12期7卷 677-681页

作者： Shejuan An Jianquan Zhu Zhihong Chen guochun zhang Zhen Wang Yilong Wu Guangdong Lung Cancer Institute Guangdong General Hospital Guangzhou 510080 China Research Center of Medical Sciences Guangdong Academy of Medical Sciences Guangzhou 510080 China Department of Lung Cancer Tianjin Cancer Hospital Tianjin 300060 China

Objective: To investigate whether laminin 5 (LN5) might be a predictor in lung cancer patient treated with gefitinib and estimate the underlying mechanisms. Methods: LN5 and epidermal growth factor receptor (EGFR) mRNA expression level were detected in the tumor tissues of lung cancer patients who underwent surgery resection prior to gefitinib treatment. EGFR exon 19 and 21 mutation status was also detected in these specimens. The association between LN5, EGFR mRNA expression level, EGFR mutation and gefitinib treatment response were evaluated. In vitro study were carried by adding exog- enous LN5 and gefitinib to A549 lung cancer cell line, and Western-blotting was performed to investigate the phosphorylation level of EGFR,Ak, and Erk. Results: The disease control rate according to LN5 mRNA level was 52.9% for the below cut- point group, and 17.6% for the above cut-point (P = 0.009). The in vitro study showed that exogenous LN5 can neutralize the inhibition of phosphor-Akt by gefitinib. Conclusion: Patients with lower LN5 mRNA level would likely benefit from gefitinib. In vitro study indicated that the inhibition of Akt induced by gefitinib might be reversed by LN5. These results provide important insights into the molecular mechanisms underlying sensitivity to gefitinib in lung cancer patients.

关键词： lung cancer laminin 5 (LN5) gefitinib