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Rare Metals 2024年第9期43卷 4387-4400页

作者： Ao Xia Jia-Guang Zheng Qing-Bo Zhang Yu-gang shu Cheng-Guo Yan Liu-Ting Zhang Zhan-Liang Tao Li-Xin Chen School of Energy and Power Jiangsu University of Science and Technology Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai University State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and EngineeringZhejiang University

The facile construction of nanoscale NbHxsupported by Ti3C2（NbHx@Ti3C2） was achieved using facile ball milling strategy to improve the hydrogen desorption kinetics and reversibility of magnesium borohydride (Mg（BH4）2).The doping of 30 wt%NbHx@Ti3C2catalyst reduced the onset dehydrogenation temperature of Mg（BH4）2to 71.2℃.Additionally,the Mg（BH4）2+30NbHx@Ti3C2composite achieved remarkable hydrogen release of over 9.2 wt% at a temperature as low as 230℃,indicating unexpected dehydrogenation ***,the reversibility of NbHx@Ti3C2doped Mg（BH4）2was retained to more than 4.2 wt%after four cycles,which was increased by 68% compared to that of undoped Mg（BH4）*** strong catalysis of NbHx@Ti3C2catalyst could be attributed to the synergistic effect of NbHxand Ti3C2in hydrogen spillover and *** as a??hydrogen pump??for effective hydrogen spillover,while Ti3C2created numerous diffusion channels for hydrogen dissolution and provided the active catalytic site to facilitate the re/dehydrogenation of Mg（BH4）2.

关键词： Catalysts Hydrogen storage Magnesium borohydride Mxene

Effects of pulmonary surfactant combined with noninvasive positive pressure ventilation in neonates with respiratory distress syndrome

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World Journal of Clinical Cases 2024年第23期12卷 5366-5373页

作者： Ze-Ning Shi Xin Zhang Chun-Yuan Du Bing Zhao shu-gang Liu Department of Pediatrics Army Military Medical University Officer School Affiliated HospitalShijiazhuang 050000Hebei ProvinceChina Department of Anesthesiology Army Military Medical University Officer School Affiliated HospitalShijiazhuang 050000Hebei ProvinceChina Department of Gynecology and Obstetrics Army Military Medical University Officer School Affiliated HospitalShijiazhuang 050000Hebei ProvinceChina

BACKGROUND Neonatal respiratory distress syndrome(NRDS)is one of the most common diseases in neonatal intensive care units,with an incidence rate of about 7%among ***,it is a leading cause of neonatal death in hospitals in *** main mechanism of the disease is hypoxemia and hypercapnia caused by lack of surfactant AIM To explore the effect of pulmonary surfactant(PS)combined with noninvasive positive pressure ventilation on keratin-14(KRT-14)and endothelin-1(ET-1)levels in peripheral blood and the effectiveness in treating *** Altogether 137 neonates with respiratory distress syndrome treated in our hospital from April 2019 to July 2021 were *** these,64 control cases were treated with noninvasive positive pressure ventilation and 73 observation cases were treated with PS combined with noninvasive positive pressure *** expression of KRT-14 and ET-1 in the two groups was *** deaths,complications,and PaO_(2),PaCO_(2),and PaO_(2)/FiO_(2)blood gas indexes in the two groups were *** operating characteristic curve(ROC)analysis was used to determine the diagnostic value of KRT-14 and ET-1 in the treatment of *** The observation group had a significantly higher effectiveness rate than the control *** was no significant difference between the two groups in terms of neonatal mortality and adverse reactions,such as bronchial dysplasia,cyanosis,and shortness of *** treatment,the levels of PaO_(2)and PaO_(2)/FiO_(2)in both groups were significantly higher than before treatment,while the level of PaCO_(2)was significantly *** treatment,the observation group had significantly higher levels of PaO_(2)and PaO_(2)/FiO_(2)than the control group,while PaCO_(2)was notably lower in the observation *** treatment,the KRT-14 and ET-1 levels in both groups were significantly decreased compared with the pre-treatment *** observation group had a reduction of KRT-14 and ET-

关键词： Pulmonary surfactant Non-invasive positive pressure ventilation Neonatal respiratory distress syndrome Keratin-14 Endothelin-1

地下室顶板用作施工电梯基础工字钢格构柱回顶施工技术

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建筑技术开发 2024年第7期51卷 95-99页

作者：曹树刚中建一局集团建设发展有限公司北京100024

施工电梯是工业与民用建筑施工中常见的垂直运输机械之一,对于有地下室的建筑工程,施工电梯基础通常设置于地下室顶板上,但整个施工电梯系统加上额定载重荷载较大,当此荷载施加于地下室顶板时,需要对地下室顶板进行回顶加固,传统作法是... 详细信息

施工电梯是工业与民用建筑施工中常见的垂直运输机械之一,对于有地下室的建筑工程,施工电梯基础通常设置于地下室顶板上,但整个施工电梯系统加上额定载重荷载较大,当此荷载施加于地下室顶板时,需要对地下室顶板进行回顶加固,传统作法是在地下室顶板上单独做施工电梯基础,并在施工电梯基础下方采取回顶加固措施,常见的回顶加固方案有扣件式钢管支撑架、盘扣式支撑架、钢柱+扣件式钢管支撑架或钢柱+盘扣式支撑架复合回顶等,但上述方案均需要占用施工电梯基础下部较大空间,其不可避免地会影响下部空间的施工。基于此,现特提出一种可直接将地下室顶板作为施工电梯基础并采用工字钢格构柱进行回顶加固施工技术,该技术既可避免单独做施工电梯基础,又可以减少施工电梯回顶对下部空间的占用,该技术安全可靠并可节约成本。

关键词：工字钢格构柱施工电梯回顶加固地下室顶板

Role of sympathetic and parasympathetic nerves in the development of gastric cancer through antagonism

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Chinese Medical Journal 2021年第8期134卷 908-909页

作者： Jing Gao shu-gang Liu Traditional Chinese Medicine Department The Fourth Hospital of Hebei Medical UniversityShijiazhuangHebei 050011China.

Previous studies have shown that the autonomic nervous system plays a role in the occurrence and development of gastric cancer(GC).[1-3]Sympathetic and parasympathetic nerve fibers constitute a network in gastric wall submucosa and muscularis to control gastric peristalsis and *** two groups of nerve fibers antagonize and coordinate with each other under the regulation of the central nervous system to complete their innervation ***,most of the studies on the autonomic nervous system and GC focus on a single species nerve fiber or *** present study aimed to elucidate how the sympathetic and parasympathetic nervous systems antagonize and coordinate in the occurrence and development of ***,some gastrointestinal hormones are also identified in the development of GC as helpers or tools of the sympathetic or parasympathetic nervous system.

关键词： sympathetic gastric cancer

An Analytic Model of Galactic Winds and Mass Outflows

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Chinese Journal of Astronomy and Astrophysics 2005年第4期5卷 327-346页

作者： Cheng-gang shu Hou-Jun Mo shu-De Mao Joint Center for Astrophysics Shanghai Normal University Shanghai 200234 Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 Max-Planck-Institut fuer Astrophysik Karl-Schwarzschild-Strasse 1 Postfach 1317 D-85741 Garching Germany Astronomy Department University of Massachusetts Amherst MA 01003 USA Jodrell Bank Observatory Univ. of Manchester Macclesfield Cheshire SK11 9DL UK

Galactic winds and mass outflows are observed both in nearby starburst galaxies and in high-redshiff star-forming galaxies. We develop a simple analytic model to understand the observed superwind phenomenon with a discussion of the model uncertainties. Our model is built upon the model of McKee ＆ Ostriker for the interstellar medium. It allows one to predict how properties of a superwind,such as wind velocity and mass outflow rate, are related to properties of its starforming host galaxy, such as size, gas density and star formation rate. The model predicts a threshold of star formation rate density for the generation of observable galactic winds. Galaxies with more concentrated star formation activities produce superwinds with higher velocities. The predicted mass outflow rates are comparable to （or slightly larger than） the corresponding star formation rates. We apply our model to both local starburst galaxies and high-redshift Lyman break galaxies,and find its predictions to be in good agreement with current observations. Our model is simple and so can be easily incorporated into numerical simulations and semi-analytical models of galaxy formation.

关键词： galaxies starburst - galaxies ISM - galaxies kinematics and dynamics - galaxies formation and evolution

柠檬酸协同黄铁矿对煤矸石硅缓释及土壤砷稳定性的影响研究

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Journal of Central South University 2024年第4期31卷 1276-1291页

作者：吕鑫冯胜元占鸿志雷建兰舒自刚周佩雯柴喜林 School of Chemical&Environmental Engineering China University of Mining&Technology(Beijing)Beijing 100083China Jiangxi Gaiya Environment Science and Technology Co. Ltd.Shangrao 334000China Central South(Shangrao)Metallurgical Industry Research Institute Co. Ltd.Shangrao 334000China School of Resources and Environment Shanxi Agricultural UniversityTaiyuan 030031China

煤矸石是煤炭开采和加工过程中产生的固体废弃物,通常由硅酸盐组成。其在提升硅的生物可利用性方面具有显著潜力,因此可作为农业用硅肥的潜在来源。然而,煤矸石硅的缓释性不足与植物的慢吸收速率存在天然矛盾,限制了煤矸石作为硅肥的应... 详细信息

煤矸石是煤炭开采和加工过程中产生的固体废弃物,通常由硅酸盐组成。其在提升硅的生物可利用性方面具有显著潜力,因此可作为农业用硅肥的潜在来源。然而,煤矸石硅的缓释性不足与植物的慢吸收速率存在天然矛盾,限制了煤矸石作为硅肥的应用。本研究探讨了柠檬酸和黄铁矿对煤矸石中硅的缓释效果,以及由此制备的复合物(C@PC-10)对土壤中砷的固化与稳定化作用。研究结果显示,C@PC-10能有效减缓煤矸石中硅的释放速率,在30 d的实验周期内,土壤中水溶态砷和有效态砷的去除效率分别达到71.3%和55.9%。此外,酸溶态砷的比例降低,而残渣态砷的比例增加。模拟酸雨实验进一步表明C@PC-10能够抑制土壤中砷的溶出。通过X射线衍射(XRD)、X射线光电子能谱(XPS)和傅里叶变换红外光谱(FT-IR)分析,本研究证实了球磨过程中黄铁矿的氧化及其向黄钾铁矾和FeOOH的转化。这些发现揭示了氧化黄铁矿对砷的吸附能力显著增强,表明C@PC-10复合物是一种高效的修复材料,能够调控硅酸盐的释放并有效阻碍土壤中砷的迁移。

关键词：砷煤矸石硅缓释固化稳定化

Stellar and HI Mass Functions Predicted by a Simple Preheating Galaxy Formation Model

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Chinese Journal of Astronomy and Astrophysics 2007年第4期7卷 590-594页

作者： Zhi-Jian Luo Cheng-gang shu Department of Physics Jiangxi Normal University Nanchang 330022 Joint Center for Astrophysics Shanghai Normal University Shanghai 200234 Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030

According to the new preheating mechanism of galaxy formation suggested by Mo et al., we construct a simple model of formation of disk galaxies within the current paradigm of galaxy formation. It incorporates preheating, gas cooling, bulge formation and star for- mation. The predicted stellar and HI mass functions of galaxies are discussed and compared with the observations. It is found that our model can roughly match both the observed galaxy luminosity function and the observed HI-mass function.

关键词： galaxies: halos - galaxies: formation - galaxies: bulges - galaxies: cooling flows

Electron gun for SSRF

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Nuclear Science and Techniques 2003年第1期14卷 20-23页

作者： SHENG shu-gang LIN Guo-Qiang 等 ShanghaiNationalSynchrotronRadiationCenter ShanghaiInstituteofNuclearResearchTheChineseAcademyofSciencesShanghai201800 ShanghaiNationalSynchrotronRadiationCenter ShanghaiInstitute

A 100 kV triode-electron-gun has been designed and manufactured for the Linac of Shanghai Synchrotron Radiation Facility (SSRF). In this paper the performance of the gun and some key components are described.

关键词： SSRF 上海同步辐射装置电子枪 EGUN 电子束测量装置离子泵浦 EIMAC

Functional Mechanism of Resveratrol in Inhabiting Growth of Cells ls174t and Its Mechanism in Subcutaneously Transplanted Tumor of Nude Mice

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Chemical Research in Chinese Universities 2008年第6期24卷 756-761页

作者： CHEN Jie DONG Xin-shu GUO Xing-gang The Affiliated Tumor Hospital Harbin Medical University Harbin 150040 P. R. China

To explore the functional mechanism of Resveratrol against colon cancer cells ls174t and the growth of colon cancer tissue of tumor-bearing mice, MTT method was used to observe the functions of resveratrol for inhibition against cells ls174t in vitro. Transmission electron microscope was used to observe the cell apoptosis. FCM assay was performed to measure the change of the cell apoptosis rate and of cell cycle. RT-PCR method was used to detect the expressions of bcl-2 and bax mRNA. Western blot method was used to detect the expressions of bcl-2 and bax protein. Ceils ls174t were transplanted subcutaneously to nude mice to observe the effect of resveratrol on the growth of subcutaneously transplanted tumor, RT-PCR method was used to detect the expressions of bcl-2 and bax mRNA in the tumor tissue. Western blot method was used to detect the expressions of bcl-2 and bax protein in the tumor tissue. Resveratrol has an effect of inhibiting proliferation of cells ls174t in vitro（P〈0.01）. It is able to induce the apoptosis of cells ls174t, causing the decrease in the expression of bcl-2 and the increase in the expression of bax. Resveratrol could inhibit the growth of subcutaneously transplanted tumor of nude mice（P〈0.05）, causing the decrease in the expression of bcl-2 and the increase in the expression of bax. Resveratrol can inhibit the growth of cells 174t and the growth of subcutaneously transplanted tumor. The mechanism is possibly related to the induction of the cell apoptosis and the regulation of bcl-2/bax expression.

关键词： Resveratrol Colon cancer Tumor cell Cell apoptosis Nude mice

三重四级杆气质联用仪多反应监测模式测定莜面中脂肪酸含量

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粮油食品科技 2024年第3期32卷 170-178页

作者：张春萍郭舒岗张蕤熊慧霞薛红波杜兴山西省疾病预防控制中心山西太原030000

采用三重四级杆气质联用仪(GC/MS/MS)多反应监测模式(multiple reaction monitoring,MRM)建立莜面中脂肪酸含量的分析方法。莜面样品和脂肪酸标准品经过氢氧化钾-甲醇和三氟化硼-甲醇溶液甲酯化15 min生成对应的脂肪酸甲酯。经DB-FastFA... 详细信息

采用三重四级杆气质联用仪(GC/MS/MS)多反应监测模式(multiple reaction monitoring,MRM)建立莜面中脂肪酸含量的分析方法。莜面样品和脂肪酸标准品经过氢氧化钾-甲醇和三氟化硼-甲醇溶液甲酯化15 min生成对应的脂肪酸甲酯。经DB-FastFAME(90 m×0.25 mm×0.25μm)色谱柱在电子轰击电离(EI)源下采用多反应监测模式进行扫描,外标法定量分析。40种脂肪酸甲酯在38 min内达到完全分离,脂肪酸甲酯化标准品在0.4~40μg/mL浓度范围内有良好的线性关系,相关系数R均达到0.9997。C20:2等6种脂肪酸定量限为0.003 g/100 g,其余34种脂肪酸定量限为0.0006 g/100 g。脂肪酸在3个浓度添加水平下的加标回收率为86.8%~107.3%,精密度在0.9%~5.2%之间。此法操作简便,选择性高,准确度、精密度、灵敏度好,适用于莜面中脂肪酸含量的快速、准确测定。

关键词：莜面三重四级杆气质联用仪脂肪酸多反应监测模式