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水性脱模剂对混凝土外观气泡影响的研究

四川建材 2024年第8期50卷 32-34页

作者：宋欣倪涛汪咏梅封柯 Serina ng 四川砼道科技有限公司四川成都610200 石家庄市长安育才建材有限公司河北石家庄051430

以菜籽油为基础制备了一款水性脱模剂,并通过数字图像和图像处理方法对比研究了菜籽油及其制成的水性脱模剂在不同振动时间和不同模板上对混凝土表面气孔的影响,研究发现在不同条件下,相较于油性脱模剂,水性脱模剂能够有效减少混凝土表... 详细信息

以菜籽油为基础制备了一款水性脱模剂,并通过数字图像和图像处理方法对比研究了菜籽油及其制成的水性脱模剂在不同振动时间和不同模板上对混凝土表面气孔的影响,研究发现在不同条件下,相较于油性脱模剂,水性脱模剂能够有效减少混凝土表面气孔,尤其是大尺寸气孔的数量。此外,延长振动时间、选用表面光滑的模板也能有效降低混凝土表面气孔。

关键词：水性脱模剂混凝土表面气孔振动时间模板类型

Efficacy and safety of Xileisan combined with mesalazine for ulcerative colitis:A meta-analysis and trial sequential analysis

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world Journal of Clinical Cases 2024年第21期12卷 4703-4716页

作者： Xin-Yu Yang Yun-Feng Yu ke-ke Tong Gang Hu Rong Yu Lian-Jun Su School of Traditional Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina The First Hospital of Hunan University of Chinese Medicine Hunan University of Chinese MedicineChangsha 410007Hunan ProvinceChina

BACKGROUND The benefits and risks of Xileisan(XLS)in the treatment of ulcerative colitis(UC)remain *** The present study aimed to evaluate the efficacy and safety of the combination of XLS and mesalazine when treating *** we searched eight databases for clinical trials evaluating the combination of XLS and mesalazine in the treatment of UC,up to January ***-analysis and trial sequential analysis(TSA)were performed using Revman 5.3 and TSA 0.***.5.10 beta,*** The present study included 13 clinical studies involving 990 patients,of which 501 patients received XLS combined with mesalazine while 489 patients received mesalazine *** meta-analysis showed that,in terms of efficacy,the combination of XLS and mesalazine significantly improved the clinical efficacy rate by 22%[risk ratio(RR)=1.22;95%CI:1.15–1.28;Pwhile significantly reducing the duration of abdominal pain by 2.25 days[mean difference(MD)=-2.25;95%CI:-3.35 to-1.14;Png/mL(MD=-16.25;95%CI:-20.48 to-12.01;Png/mL(MD=-14.14;95%CI:-24.89 to-3.39;P=0.01).The TSA indicated conclusiveness in the meta-analysis of the efficacy *** terms of safety,the meta-analysis revealed that the combination of XLS and mesalazine did not increase the occurrence of total and gastrointestinal adverse events,abdominal distension,and erythema(P>0.05).The TSA showed non conclusive findings in the meta-analysis of the safety ***’s test showed no publication bias(P=0.734).CONCLUSION Treatment with XLS alleviated the clinical symptoms,intestinal mucosal injury,and inflammatory response in patients with UC,while demonstrating good safety.

关键词： Xileisan Mesalazine Ulcerative colitis Meta-analysis Trial sequential analysis

定向凝固条件下Ti_(3)Al合金中梯度纳米结构的形成机制与力学行为——原子尺度研究

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Transactions of Nonferrous Metals Society of China 2024年第5期34卷 1507-1519页

作者：邹鹏飞李昌侯兆阳 Jia-yi SUN 高全华李克凡王真 ke-jun DOng 长安大学理学院西安710064 Faculty of Natural Mathematics&Engineering SciencesKing’s College LondonLondonWC2R 2LSUnited Kingdom School of Engineering Design and Built EnvironmentWestern Sydney UniversityPenrithNSW 2751Australia

通过分子动力学(MD)模拟方法对Ti_(3)Al合金在定向凝固条件下的生长机理进行系统研究,并通过对比纳米晶(ng)、粗晶(CG)和梯度纳米晶(Gng)合金,研究Ti_(3)Al合金的结构力学性能。结果表明,在凝固过程中Ti_(3)Al相优先生长为等轴晶组织,... 详细信息

通过分子动力学(MD)模拟方法对Ti_(3)Al合金在定向凝固条件下的生长机理进行系统研究,并通过对比纳米晶(ng)、粗晶(CG)和梯度纳米晶(Gng)合金,研究Ti_(3)Al合金的结构力学性能。结果表明,在凝固过程中Ti_(3)Al相优先生长为等轴晶组织,随后逐渐演变为柱状粒,并最终形成梯度纳米晶结构。此时,晶粒在与凝固方向平行的方向优先生长。此外,研究还发现,相较于ng和CG结构,Gng结构定向凝固合金具有更高的抗拉强度和更好的延展性。Gng结构不仅有效抑制了小晶粒区域的应变局域化和晶粒生长,而且促进了较大晶粒区域的位错形成,从而获得更好的力学性能。

关键词：定向凝固 Ti_(3)Al合金分子动力学模拟梯度纳米结构

Linear dichroism transition and polarization-sensitive photodetector of quasi-one-dimensional palladium bromide

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Chinese Physics B 2024年第6期33卷 532-539页

作者：朱万里甄伟立牛瑞焦珂珂岳智来胡慧杰薛飞张昌锦 Anhui key Laboratory of Low-energy Quantum Materials and Devices High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei 230031China Science Island Branch Graduate School of University of Science and Technology of ChinaHefei 230026China School of Physics Hefei University of TechnologyHefei 230601China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Perpendicular optical reversal of the linear dichroism transition has promising applications in polarization-sensitive optoelectronic devices. we perform a systematical study on the in-plane optical anisotropy of quasi-one-dimensional PdBr_(2) by using combined measurements of the angle-resolved polarized Raman spectroscopy(ARPRS) and anisotropic optical absorption spectrum. The analyses of ARPRS data validate the anisotropic Raman properties of the PdBr_(2) *** anisotropic optical absorption spectrum of PdBr_(2) nanoflake demonstrates distinct optical linear dichroism reversal. Photodetector constructed by PdBr_(2) nanowire exhibits high responsivity of 747 A·w^(-1) and specific detectivity of 5.8×10^(12) Jones. And the photodetector demonstrates prominent polarization-sensitive photoresponsivity under 405-nm light irradiation with large photocurrent anisotropy ratio of 1.56, which is superior to those of most of previously reported quasi-one-dimensional counterparts. Our study offers fundamental insights into the strong optical anisotropy exhibited by PdBr_(2), establishing it as a promising candidate for miniaturization and integration trends of polarization-related applications.

关键词： linear dichroism reversal polarization sensitivity anisotropy polarized photodetector

Resistant Pulmonary TB-HIV Co-Infection in an Infant: About a Case

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Open Journal of Pediatrics 2024年第2期14卷 420-425页

作者： Mariam Maiga Pierre Togo Tati Simaga Mariam Traoré Moussa Konaté Mamadou Diallo Alou Samaké Mamadou keïta Korotoumou wélé Diallo Djibril Kassogué Pediatrics Department Distric VI Reference Health Center Bamako Mali Paediatrics Department Gabriel Touré Teaching Hospital Bamako Mali Pediatrics Department Mali Hospital Bamako Mali Paediatrics Department Timbuktu Regional Hospital Bamako Mali

Diagnosis of childhood tuberculosis (TB) is difficult, especially in resource-limited countries where the number of reported cases of TB-HIV co-infection continues to rise. This co-infection poses a diagnostic and therapeutic problem for caregivers. we report a case of rifampicin-resistant HIV-TB pulmonary coinfection in a 19-month-old infant.

关键词： Tuberculosis Rifampicin Resistance HIV Infants

Mechanical property and thermal shock behavior of tungsten-yttria-stabilized zirconia cermet fabricated by spark plasma sintering

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Tungsten 2024年第1期6卷 134-140页

作者： Lin-Chao Zhang ke Jing Rui Liu Zhuo-Ming Xie Jun-Feng Yang Gang Li Xian-Ping w.ng Xue-Bang wu Qian-Feng Fang Chang-Song Liu key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of ChinaChengdu 610041China

The cermet fuels have been considered as a potential key component for the nuclear thermal propulsion,and the homogeneity of the fuel particles in the metal matrix plays a crucial role in stabilizing the structure at extremely high *** this work,liquid paraffin was used as additive to improve the distribution of yttria-stabilized zirconia(YSZ,an appropriate surrogate for UO_(2) fuel)microspheres in the tungsten(w)matrix,and the w-YSZ cermet wafers(volume ratio 1:1)with a relative density of 97.6%were fabricated by spark plasma sintering with a specifically designed *** effects of the paraffin dosage(0-5 wt.%)on the homogeneity,microstructure,mechanical properties,and the thermal conductivity of w-YSZ cermet were *** w-YSZ sample with 2 wt.%paraffin shows the highest homogeneity and exhibits the best comprehensive properties,including the ultimate tensile strength of 132.2 MPa at 600℃,the bending strength of455 MPa and thermal conductivity of 50 w·m^(-1)·K^(-1)at room ***,the cermet could keep structurally sound after thermal shocked at a heat load of 20 Mw·m^(-2).These results would be helpful for the design and optimization of the cermet fuels in the nuclear thermal propulsion.

关键词： Nuclear thermal propulsion Tungsten Cermet Liquid paraffin Thermal shock

AtVQ25 promotes salicylic acid-related leaf senescence by fine-tuning the self-repression of AtwRKY53

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Journal of Integrative Plant Biology 2024年第6期66卷 1126-1147页

作者： Qi Tan Mingming Zhao Jingwei Gao ke Li Mengwei Zhang Yunjia Li Zeting Liu Yujia Song Xiaoyue Lu Zhengge Zhu Rongcheng Lin Pengcheng Yin Chunjiang Zhou Geng w.ng Ministry of Education key Laboratory of Molecular and Cellular Biology Hebei Research Center of the Basic Discipline of Cell BiologyHebei Collaboration Innovation Center for Cell Signaling and Environmental AdaptationHebei Key Laboratory of Molecular and Cellular BiologyCollege of Life SciencesHebei Normal UniversityShijiazhuang 050024China College of Chemical Engineering Shijiazhuang UniversityShijiazhuang 050035China Institute of Botany Chinese Academy of SciencesBeijing 100093China

Most mechanistic details of chronologically ordered regulation of leaf senescence are *** networks centered on AtwRKY53 are crucial for orchestrating and integrating various senescence-related ***,AtwRKY53binds to its own promoter and represses transcription of AtwRKY53,but the biological significance and mechanism underlying this selfrepression remain *** this study,we identified the VQ motif-containing protein AtVQ25as a cooperator of *** expression level of AtVQ25 peaked at mature stage and was specifically repressed after the onset of leaf ***25-overexpressing plants and atvq25 mutants displayed precocious and delayed leaf senescence,***,we identified AtwRKY53 as an interacting partner of *** determined that interaction between AtVQ25 and AtwRKY53 prevented AtwRKY53from binding to w-box elements on the AtwRKY53promoter and thus counteracted the selfrepression of *** addition,our RNA-sequencing data revealed that the AtVQ25-AtwRKY53 module is related to the salicylic acid(SA)*** leaf senescence and SA-induced leaf senescence in AtVQ25-overexpressing lines were inhibited by an SA pathway mutant,atsid2,and Nah G transgenic plants;AtVQ25-overexpressing/atwrky53 plants were also insensitive to SA-induced leaf ***,we demonstrated that AtVQ25 directly attenuates the self-repression of AtwRKY53 during the onset of leaf senescence,which is substantially helpful for understanding the timing of leaf senescence onset modulated by AtwRKY53.

关键词： AtwRKY53 leaf senescence salicylic acid transcriptional regulation VQ motif-containing proteins

Enhanced photothermal dehydration of methanol over w_(18)O_(49)/Au/SAPO-34 catalysts with broadened light absorption

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Rare Metals 2024年第3期43卷 1139-1152页

作者： Ya-Qin Tang Meng-Xia Yan Chang-Qian Lu Shao-Yuan Li Kui-Xian wei Tao Qu wen-HuiMa Yong-Nian Dai Kong-Zhai Li Da-Jun Luo Xue-Liang Zhang Yi-ke Liu Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming650093China School of Materials and Energy Engineering Guizhou Institute of TechnologyGuiyang550003China

Methanol-to-olefins(MTO)process is one of the most critical pathways to produce low carbon ***,the reaction is driven by thermal catalysis,which inevitably needs to consume large amounts of fossil *** a new technique to substitute for the fuel burning is urgent for MTO process to improve the industry prospects and ***,we report a novel w_(18)O_(49)/Au/SAPO-34(w/Au/S),a multifunctional photothermal catalyst for the MTO reaction.A high methanol conversion was achieved under xenonum(Xe)lamp irradiation,yielding methyl ether(ME)and ethylene as the main *** optimized w/Au/S catalysts showed ethylene yield as high as 250μmol in 60 min,which was 2.5 times higher than that of Au/*** physiochemical characterization revealed that the SAPO-34 molecular sieves were surrounded by Au and w_(18)O_(49)nanoparticles,which exhibited a strong localized surface plasmon resonance excitation around 540 nm and light absorption beyond 500 *** multifunctional catalysts showed a strong photothermal effect,arising from the broadened light absorption of Au and w_(18)O_(49)nanoparticles,leading to a temperature as high as 250℃on the surface of the *** study showed that the superior ethylene selectivity of w/Au/S catalysts was attributed to the moderating acidic sites of w_(18)O_(49)for methanol dehydration to *** research may provide new insight for designing heterostructures to improve photo-to-chemical conversion performance and is expected to accelerate progress toward the excellent multifunctional photothermal catalysts with broad light absorption for methanol activation and C-C bond formation.

关键词： Methanol conversion Ethylene Photothermal catalysis w_(18)O_(49) BrΦnsted-acid

Recess-free enhancement-mode AlGaN/GaN RF HEMTs on Si substrate

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Journal of Semiconductors 2024年第6期45卷 81-86页

作者： Tiantian Luan Sen Huang Guanjun Jing Jie Fan Haibo Yin Xinguo Gao Sheng Zhang ke wei Yankui Li Qimeng Jiang Xinhua w.ng Bin Hou Ling Yang Xiaohua Ma Xinyu Liu High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of Microelectronics of Chinese Academy of SciencesBe i-jing 100029China School of integrated Circuits University of Chinese Academy of SciencesBeijing 100049China Faculty of integrated Circuits Xidian UniversityXi’an 710071China

Enhancement-mode(E-mode)GaN-on-Si radio-frequency(RF)high-electron-mobility transistors(HEMTs)were fabri-cated on an ultrathin-barrier(UTB)AlGaN(<6 nm)/GaN heterostructure featuring a naturally depleted 2-D electron g... 详细信息

Enhancement-mode(E-mode)GaN-on-Si radio-frequency(RF)high-electron-mobility transistors(HEMTs)were fabri-cated on an ultrathin-barrier(UTB)AlGaN(ng a naturally depleted 2-D electron gas(2DEG)*** fabricated E-mode HEMTs exhibit a relatively high threshold voltage(VTH)of+1.1 V with good uniformity.A maxi-mum current/power gain cut-off frequency(fT/fMAX)of 31.3/99.6 GHz with a power added efficiency(PAE)of 52.47%and an out-put power density(Pout)of 1.0 w/mm at 3.5 GHz were achieved on the fabricated E-mode HEMTs with 1-μm gate and Au-free ohmic contact.

关键词： AlGaN/GaN heterostructure ultrathin-barrier enhancement-mode radio-frequency power added efficiency silicon substrate