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Breaking down barriers: enabling care-by-parent in neonatal intensive care units in China

World Journal of Pediatrics 2017年第2期13卷 144-151页

作者： Xiao-Ying Li Shoo Lee Hua-Feng Yu xiang Y Ye Ruth Warre xiang-hong liu Jian-hong liu Neonatalogy Department Qilu Children’s Hospital Shandong UniversityJinanChina Maternal—Infant Care Research Centre Mount Sinai HospitalTorontoOntarioCanada Department of Pediatrics University ofTorontoOntarioCanada

Background:Denying parents access to their infant in the Neonatal Intensive Care Unit (NICU) is a standard practice in most hospitals across *** is not usually permitted or may be strictly limited,and NICU care for most neonates is provided by health-care professionals with little participation of the *** exception to this rule is the level 2 'Room-In' ward in Qilu Children's Hospital,Shandong University,where parents have 24-hour access to their infants and participate in providing ***:This retrospective cohort study compared the outcomes of infants who were admitted to the NICU and remained there throughout their stay (NICU-NICU group,n=428),admitted to the NICU and then transferred to the Room-In ward (NICU-RIn group,n=1018),or admitted straight to the Room-In ward (RIn only group,n=629).Results:There were no significant differences in the rates of nosocomial infection,bronchopulmonary dysplasia,intraventricular hemorrhage,and retinopathy of prematurity between the NICU-NICU and NICURIn *** rate of necrotizing enterocolitis was significantly lower in the NICU-RIn group (P=0.04),while weight gain and duration of hospital stay were significantly higher (both P<0.001).Rates of adverse outcomes were lower in RIn-only infants due to their low severity of illness on ***:Allowing parents access to their infant in the NICU is feasible and safe in China,and may result in improvements in infant *** studies are required to generate stronger evidence that can inform changes to neonatal care in China.

关键词： care-by-parent family-centered care infant newborn neonatal intensive care unit parental involvement

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Physical properties of WSTi3515S burn-resistant titanium alloy

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Rare Metals 2016年第5期35卷 361-366页

作者： Yun-Jin Lai Ping-xiang Zhang Xue-Min Zhang xiang-hong liu Yong Feng hong-Chao Kou Fan-Jiao Ma Wei-Dong Zeng State Key Laboratory of Solidification Processing Northwestern Polytechnical University Western Superconducting Technologies Co. Ltd. School of Materials Science and Engineering Chang’an University

Development of burn-resistant titanium alloys is the most direct way of mitigating the ignition and propagation of titanium fires in jet engines. WSTi3515S alloy（Ti–35V–15Cr–0.3Si–0.1C） is a new high alloying beta type burn-resistant titanium alloy, belonging to Ti–V–Cr type alloys which have been made significant progress in engineering technology in the past 5 years. The physical properties of WSTi3515S burn-resistant titanium alloy such as the elastic properties and thermal properties were measured and analyzed in different conditions. The results show that both the Young＇s modulus and shear modulus of WSTi3515S alloy decrease slightly with the temperature increasing at the tested temperature range. The Poisson＇s ratio of WSTi3515S alloy is around 0.36. However, the thermal properties such as the specific heat, thermal diffusivity, thermal conductivity and thermal expansion increase with the temperature increasing, which results from the strengthening of lattice heat vibration at elevated temperature. And the room temperature density of WSTi3515S alloy is 5.295 gácm^（-3）.

关键词： Physical properties WSTi3515S alloy Extrusion Burn-resistant

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Oxidation behavior of a novel multi-element alloyed Ti2AlNbbased alloy in temperature range of 650-850℃

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Rare Metals 2018年第10期37卷 838-845页

作者： Yong-Sheng He Rui Hu Wen-Zhong Luo Tao He xiang-hong liu State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 China Shaanxi Province Engineering Laboratory for Aerial Material Western Superconducting Technologies Co. Ltd Xi'an 710018China

The oxidation behavior of a novel multi-element alloyed Ti2A1Nb-based alloy （Ti-22Al-25Nb-1Mo-1V-1Zr-0.2Si） was studied in the temperature range of 650-850℃. X-ray diffraction （XRD） and scanning electron microscopy （SEM） equipped with an energy-dispersive spectroscopy （EDS） were used to identify the phase constituents and microstructure of the scales formed on the specimens after oxidation at different temperatures. Isothermal oxidation tests show that the oxidation rate of the alloyed TiEAlNb-based alloy is obviously reduced at all temperatures, and the mass gains are very low for this alloy in comparison with those of Ti-22Al-25Nb alloy. The alloying elements Mo, V, Zr and Si have an obvious affect on the oxidation products of the alloys. The improved oxidation resistance for the alloy is ascribed to the introduction of Mo, V, Zr and Si elements, which are beneficial to the selective oxidation of Al to form protective oxides while are disadvantage of the formation of poor oxidation resistance oxides such as AlNbO4.

关键词： Oxidation resistance Oxide scale Ti2AlNb- based alloy Alloying

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Recrystallization behavior of Ti40 burn-resistant titanium alloy during hot working process

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International Journal of Minerals,Metallurgy and Materials 2016年第5期23卷 581-587页

作者： Yun-jin Lai She-wei Xin Ping-xiang Zhang Yong-qing Zhao Fan-jiao Ma xiang-hong liu Yong Feng State Key laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 China Western Superconducting Technologies Co. Ltd. Xi'an 710018 China Northwest Institute for Nonferrous Metal Research Xi'an 710016 China

The recrystallization behavior of deformed Ti40 alloy during a heat-treatment process was studied using electron backscatter dif- fraction and optical microscopy. The results show that the microstructural evolution of Ti40 alloy is controlled by the growth behavior of grain-boundary small grains during the heating process. These small grains at the grain boundaries mostly originate during the forging proc- ess because of the alloy＇s inhomogeneous deformation. During forging, the deformation first occurs in the grain-boundary region. New small recrystallized grains are separated from the parent grains when the orientation between deformation zones and parent grains exceeds a certain threshold. During the heating process, the growth of these small recrystallized grains results in a uniform grain size and a decrease in the av- erage grain size. The special recrystallization behavior of Ti40 alloy is mainly a consequence of the alloy＇s high β-stabilized elemeutal con- tent and high solution strength of the β-grains, which partially explains the poor hot working ability of Ti-V-Cr-type bum-resistant titanium alloys. Notably, this study on Ti40 bum-resistant titanium alloy yields important information related to the optimization of the microstruc- tures and mechanical properties.

关键词： titanium alloys hot working recrystallization microstructural evolution

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Extrapancreatic solid pseudopapillary neoplasm followed by multiple metastases:Case report

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World Journal of Gastrointestinal Oncology 2017年第12期9卷 497-501页

作者： Hao Wu Yan-Fen Huang xiang-hong liu Mei-Hua Xu Department of Gastroenterology Xiangya Hospital of Central South UniversityChangsha 410008Hunan ProvinceChina

Solid pseudopapillary neoplasm(SPN), also known as Gruber-Frantz tumor, is a rare form of neoplasm that almost exclusively occurs in the pancreas and in young females. While the potential of malignancy is low for SPN, these tumors can mimic other diseases and require a meticulous investigation and a standard treatment by total surgical resection. We present an unusual case of SPN arising in the mesentery of a 40-year-old man with subsequent multiple metastases. Histopathological examination showed similar properties of the mesenteric neoplasm to those of SPN in pancreas. Although the mass was surgically removed, the patient died of recurrent disease 4 years after the initial presentation. We speculate that SPN originates from pancreatic progenitor cells. Further histopathological analyses are required for the prediction of SPN recurrence after resection.

关键词： Solid pseudopapillary neoplasm Mesentery Metastasis

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Rational design of integrative CNTs@Ge nanotube films as binder-free electrodes for potassium storage

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Rare Metals 2022年第9期41卷 3107-3116页

作者： Jia-Yue Xie Kai Wang Ning-Ning Li Guang-Lu Lei Hou-Shan Mei xiang-hong liu Jun Zhang College of Physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao266071China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin300071China

Alloying materials hold great potential as the anodes for potassium-ion batteries(KIBs).However,the large volume changes during K^(+) alloying/dealloying reactions can lead to structural damage of the electrodes,resulting in fast capacity loss and shortened cycle ***,we report the design of integrative carbon nanotubes@germanium(CNTs@Ge)films on copper foil by combined chemical and physical vapor *** tests show that the integrative CNTs@Ge films,working as binder-free electrodes,demonstrate higher specific capacity and rate performance in comparison with pristine Ge and CNTs *** addition,the CNTs@Ge films also deliver a long cycling stability with an areal specific capacity of 0.0417 mAh·cm^(−2) after 450 cycles at 1000μA·cm^(−2).The enhanced potassium storage properties can be attributed to the interweaved CNTs with abundant space that can effectively buffer the volume expansion of Ge during alloying/dealloying process.

关键词： Carbon nanotubes Germanium Anodes Alloy Potassium-ion batteries

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AP-2α expression and cell apoptosis of the lung tissue of rats with COPD and ECV304 cells stimulated by cigarette smoke extract

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Chinese Science Bulletin 2011年第15期56卷 1562-1568页

作者： LI JunLi CHEN Yan CHEN Ping CAI Shan PENG hong ZHOU Rui xiang XuDong LONG hong liu ShaoKun Department of Respiratory Medicine Xiangya Second Hospital of Central South University Changsha Hunan 410011 China

An increasing body of evidence suggests that apoptosis of structural cells in the lung might be an important upstream event in the pathogenesis of chronic obstructive pulmonary disease (COPD).AP-2α is one of the important transcription factors involved in the modulation of apoptosis in carcinogenesis and idiopathic-dilated *** relationship between AP-2α and apoptosis in COPD remains to be *** aim of the present study was to investigate the expression of AP-2α in the lung tissues of rats with COPD induced by smoking and its possible protective effect on cigarette smoke extract (CSE) induced endothelial cell ***-Dawley rats (n=24) were randomly assigned to normal and COPD *** COPD group was exposed to smoke from 20 commercial unfiltered cigarettes for 80 d before morphological assessment of the lung tissue was *** expression of AP-2α in lung tissues was measured by Western *** demonstrate the relationship between apoptosis and AP-2α,in vitro cell experiments were carried *** were treated with different concentrations of CSE before proliferation was measured by *** was then determined by Hoechst staining and the expression of cleaved caspase-3 and AP-2α by Western blotting over time following treatment with 5% *** were then infected with an AP-2α adenovirus vector and the expression of cleaved caspase-3 and AP-2α was compared to the control groups by Western *** COPD group showed larger air spaces and significant decrease of FEV 0.3/FVC compared with the rats in the control group (P<0.05).The expression of AP-2α was significantly higher in the lung tissue of rats with COPD compared with those of controls (P<0.05).In the ECV304 cells,CSE induced apoptosis (P<0.01) and caspase-3 activation in a time-dependent manner and reduced the cell proliferation rate in a dose-dependent manner (P<0.005).Moreover,5% CSE treatment increased endogenous AP-2α protein ***-2α overexpr

关键词：慢性阻塞性肺病细胞凋亡香烟烟雾提取物 AP 大鼠 caspase 癌组织

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Microstructure and mechanical properties of a new Ti2AlNbbased alloy after aging treatment

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Rare Metals 2018年第11期37卷 942-951页

作者： Yong-Sheng He Rui Hu Wen-Zhong Luo Tao He Yun-Jin Lai Yu-Jun Du xiang-hong liu State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China Western Superconducting Technologies Co Ltd Shaanxi Province Engineering Laboratory for Aerial MaterialXi'an 710018China

A new TiAlNb-based alloy with the composition of Ti-22Al-25Nb-1Mo-1V-1Zr-0.2Si(at%) was fabricated in the sequence of arc melting, forging, solid solution and aging. Present paper focuses on the effects of aging temperatures(700, 750, 800, 850 and 900 ℃) on microstructure, room-temperature tensile properties as well as tensile properties at 650 ℃ and creep properties at650 ℃/150 MPa. It is obvious that the aging treatment promotes the precipitation of O lathes from B2 *** aging temperature increasing, the content of O phase decreases and its size increases gradually, which leads to the decrease in tensile strengths both at room temperature and 650 ℃ and a little increase in ductility. For creep properties, the sample aged at 700 ℃ shows the best creep resistance due to its extremely high O phase content. Aging at 800 ℃ leads to the decrease in the content of O phase and softening of the alloy significantly. However, with aging temperature further increasing from 800 to 900 ℃,the precipitated O phase will be coarsened gradually, which strengthens the alloy again.

关键词： Ti_2AlNb alloy Aging Microstructure Tensile property Creep property

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UV-activated single-layer WSe_(2) for highly sensitive NO2 detection

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Rare Metals 2022年第5期41卷 1520-1528页

作者： Guo-Cai Lu xiang-hong liu Wei Zheng Jia-Yue Xie Zi-Shuo Li Cheng-Ming Lou Guang-Lu Lei Jun Zhang College of Physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao 266071China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

Transition metal dichalcogenides(TMDs)materials have received significantly increasing attention in gas sensors because of their capability of working at room temperature(RT).However,the bottlenecks such as low respon... 详细信息

关键词： Transition limit layer

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Latent Heat of TB18 Titanium Alloy during β to α Phase Transition by DSC and First-Principles Methods

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Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1844-1856页

作者： Yan-Di Jia Shuo Cao Ying-Jie Ma Sen-Sen Huang Feng-Ying Qin Shao-Qiang Li Wei xiang Qian Wang Qing-Miao Hu Bo Li Jia-Feng Lei Jing Xie xiang-hong liu Rui Yang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China AVIC The First Aircraft InstituteXi’an710089China Western Superconducting Technologies Co.Ltd.Xi’an710018China China National Erzhong Group Deyang Wanhang Die Forging Co. Ltd.Deyang618000China

The phase transition of titanium alloys is sensitive to the heat-treatment procedure,accompanied with the latent heat induced by phase ***,the latent heat during phase transition of titanium alloy has not been systematically studied,which may result in the gap between designed and actual temperature of the sample and affect the final mechanical *** this work,DSC(differential scanning calorimetry)and first-principles simulate methods were used to study theβ→αphase transition process of TB18(Ti–Al-Mo-V-Cr-Nb-Fe system)metastableβtitanium alloy,especially to reveal the influence of the heating rate on latent *** ratio of latent heat to endothermic heat of the sample during temperature rising was introduced to interpret the effect of latent heat to actual *** ratio of latent heat to endothermic heat at 1℃/min is about 15 to 20 times higher than that at 10℃/*** higher ratio indicates that the latent heat of phase transition has a more significant effect on the temperature,which is related to the temperature range of phase transition and theαvolume *** with the heating rate of 1℃/min,theβ→αphase transition takes place at higher temperature and the volume fraction ofαis smaller at 10℃/***,there is a precipitation free zone between grain boundaryαand intragranularαand the distribution ofαlamellae is heterogeneous when the heating rate is 10℃/*** of the experimental and theoretical results suggest that the latent heat of phase transition is the main cause of the temperature fluctuation during heat-treatment *** work has guiding significance for microstructure optimization affected by temperature,to achieve the desired mechanical properties.

关键词： High-strength titanium alloys Latent heat Phase transition Differential scanning calorimetry(DSC) First-principles calculation

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