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Anti-aging performance improvement and enhanced combustion efficiency of boron via the coating of PDA

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Defence Technology（防务技术） 2024年第3期33卷 399-410页

作者： shuai Ma Qingh.i shu Mengyang Zhang hongyu huang Yansong Shi Xijuan lv shuai Zhao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(MOE) Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing100081China Tangshan Research.institute of Beijing institute of Technology Tangshan063000HebeiChina

Boron is an ambitious fuel in energetic materials since its high heat release values,but its application is prohibited by low combustion efficiency and oxidization during *** polydopamine(PDA)was introduced into boron particles,investigating the impact of PDA content on the energetic behavior of *** results indicated that the PDA coating formed a fishing net structure on the surface of boron *** heat release results showed that the combustion calorific value of B@PDA was higher than that of the raw ***,the actual combustion heat of boron powder in B@10%PDA increased by 38.08%.Meanwhile,the DSC peak temperature decreased by 100.65℃under similar oxidation rate compared to raw ***,the B@PDA@AP and B@AP composites were prepared,and th.ir combustion properties were *** was demonstrated that B@10%PDA@AP exhibited superior performance in terms of peak pressure and burning time,*** peak pressure is 12.43 kPa more than B@AP and burning time is 2.22 times higher than B@***,the coating of PDA effectively inhibits the oxidization of boron during storage and enhances the energetic behavior of boron and corresponding composites.

关键词： Boron particles Polydopamine Anti-aging performance improvement heat release

hydrogen release of NaBh_(4) below 60 ℃ with binary eutectic mixture of xylitol and eryth.itol additive

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Chinese Journal of Chemical Engineering 2024年第7期71卷 225-234页

作者： Yugang shu Jiaguang Zheng Chengguo Yan Ao Xia Meiling lv Zhenxuan Ma Zhendong Yao School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018China

NaBh_(4) was widely regarded as a low-cost hydrogen storage material due to its high-mass hydrogen capacity of approximately 10.8%(mass)and high volumetric hydrogen capacity of around 115 g·L^(–1).however,it exhibits strong stability and requires temperatures above 500℃ for hydrogen release in practical *** this study,two polyhydric alcohols,xylitol and eryth.itol(XE),were prepared as a binary eutectic sugar alcohol through a grinding-melting *** binary eutectic sugar alcohol was used as a proton-hydrogen carrier to destabilize NaBh_(4).The 19NaBh_(4)-16XE composite material prepared by ball milling could start releasing hydrogen at 57.5℃,and the total hydrogen release can reach over 88.8%(4.45%(mass))of the theoretical *** the 19NaBh_(4)-16XE composite was pressed into solid blocks,the volumetric hydrogen capacity of the block-shaped composite could reach 67.2 g·L^(–1).By controlling the temperature,the hydrogen desorption capacity of the NaBh_(4)-XE composite material was controllable,which has great potential for achieving solid-state hydrogen production from NaBh_(4).

关键词： hydrogen Desorption Binary mixture NaBh_(4) Xylitol Eryth.itol

Lath-like phases formed at an extremely high temperature in a Mg-RE(RE=rare earth)-Al alloy

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Rare Metals 2024年第8期43卷 3937-3945页

作者： Bo Deng shu-h.i lv Qiang Yang Dong-Yue Zhao Jun-Yuan Fan Xin Qiu School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Chongqing Research.institute Changchun University of Science and TechnologyChongqing 401135China

Thermal stable intermetallic particles are important for the heat resistance of magnesium(Mg)*** this work,many lath-like particles formed in α-Mg grains of a Mg-8Gd-3Sm-0.7Al casting alloy when heat-treated at 873 ***-resolution high-angle annular dark field scanning transmission electron microscopy(hAADF-STEM) characterizations indicate that most of them are Mg-containing Al_(2)(Gd,Sm),with the atomic ratio of Mg:Al:(Gd,Sm) being ~1:1:1;a small part of them with relatively wider thickness are long-period stacking ordered(LPSO) phases simultaneously containing both 14h and 18R *** followed common orientation relationships with Mg matrix as those reported in previous *** addition,many Mg laths were observed in the primary blocky Al_(2)(Gd,Sm) phase at grain boundaries,where the atomic ratio of Al:(Gd,Sm) in the Al_(2)(Gd,Sm) matrix was 2:***,density functional theory(DFT) calculations illustrated the detail structure of the re-constructed Mg/Al_(2)RE interface and simultaneously deduced the underlying reason for the re-dissolution of the newly formed Mg-containing Al_(2)(Gd,Sm) plates in α-Mg matrix.

关键词： Magnesium alloy hAADF-STEM Microstructures intermetallic particles Orientation relationships interfaces

Predictors of complications after prophylactic ileostomy reversal for rectal cancer:A retrospective study

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World Journal of Gastrointestinal Surgery 2024年第5期16卷 1354-1362页

作者： Quan lv Xin-Peng shu Dong Peng Si-Qi Li Zheng Xiang Department of Gastrointestinal Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Chongqing Key Laboratory of Department of General Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

BACKGROUND Previous studies have analyzed the risk factors for complications after ileostomy reversal for rectal cancer(RC),but there were significant differences in the reported risk factors for complications after stoma *** studies have analyzed the risk factors for stoma-related complications and overall postoperative com-plications *** To analyze the risk factors for overall complications and stoma-related complications after ileostomy reversal for patients with *** This was a retrospective study of 439 patients who underwent ileostomy reversal at a clinical center and were followed up between September 2012 and September *** variables are expressed as the mean±SD and were analyzed with.independent-sample t tests,while frequency variables are expressed as n(%),and theχ2 test or Fisher’s exact test was *** and multivariate logistic regression analyses were used to identify predictors of overall complications and stoma-related *** The overall complication rate after ileostomy reversal was 11.4%.Patients with lower preoperative albumin concentration(Pive times(Pikely to experience postoperative *** incidence of stoma-related complications was 6.4%.Analysis of the study showed that a higher body mass index(BMi)(Pive comorbid hypertension(P=0.049),time from primary surgery to ileostomy reversal(Pion time(P=0.010)were more likely to result in stomarelated complications *** logistic regression analysis revealed that a lower preoperative albumin level(Pi:0.828-0.958)was an independent risk factor for overall ***,multivariate analysis revealed that BMi(Pi:1.041-1.330)and time from primary surgery to ileostomy reversal(Pi:1.038-1.252)were independent risk factors for stoma-related compl

关键词： ileostomy Reversal Risk factors Complications Rectal cancer

Two‑Dimensional Cr_(5)Te_(8)@Graphite heterostructure for Efficient Electromagnetic Microwave Absorption

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Nano-Micro Letters 2024年第3期16卷 407-422页

作者： Liyuan Qin Ziyang Guo shuai Zhao Denan Kong Wei Jiang Ruibin Liu Xijuan lv Jiadong Zhou Qingh.i shu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081People’s Republic of China Advanced Research.institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081People’s Republic of China Tangshan Research.institute Beijing Institute of TechnologyTangshan 063099People’s Republic of China

Two-dimensional(2D)transition metal chalcogenides(TMCs)hold great promise as novel microwave absorption materials owing to th.ir interlayer interactions and unique magnetoelectric ***,overcoming the impedance mismatch at the low loading is still a challenge for TMCs due to the restricted loss pathways caused by th.ir high-density ***,an interface engineering based on the heterostructure of 2D Cr_(5)Te_(8) and graphite is in situ constructed via a one-step chemical vapor deposit to modulate impedance matching and introduce multiple attenuation ***,the Cr_(5)Te_(8)@EG(ECT)heterostructure exhibits a minimum reflection loss of up to−57.6 dB at 15.4 Ghz with a thin thickness of only 1.4 mm under a low filling rate of 10%.The density functional theory calculations confirm that the splendid performance of ECT heterostructure primarily derives from charge redistribution at the abundant intimate interfaces,thereby reinforcing interfacial polarization ***,the ECT coating displays a remarkable radar cross section reduction of 31.9 dB m^(2),demonstrating a great radar microwave scattering *** work sheds light on the interfacial coupled stimulus response mechanism of TMC-based heterogeneous structures and provides a feasible strategy to manipulate high-quality TMCs for excellent microwave absorbers.

关键词： Chemical vapor deposition interface polarization engineering Cr_(5)Te_(8)-graphite heterojunctions Microwave absorption

Longitudinal gut fungal alterations and potential fungal biomarkers for the progression of primary liver disease

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Science China(Life Sciences) 2024年第6期67卷 1183-1198页

作者： Shiman Jiang lvwan Xu Yanfei Chen Zheyue shu Longxian lv Yuxi Zhao Kefan Bi Sisi Yang Qiangqiang Wang Lanjuan Li State Key Laboratory for Diagnosis and Treatment of infectious Diseases National Clinical Research Center for Infectious DiseasesNational Medical Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Division of hepatobiliary and Pancreatic Surgery Department of SurgeryThe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Liver disease,a major health concern worldwide,is a serious and progressive ***,we not only established a mouse model of DEN+CCl4-induced primary liver disease but also collected clinical human samples to investigate longitudinal alterations in the gut *** liver disease advanced,gut integrity was disrupted,and the mycobiota was disturbed in the mouse *** metabolites associated with hepatocellular carcinoma(hCC)differed from those associated with the cirrhotic phase as follows:levels of stercobilin and aflatoxin B1 dialcohol were reduced,while levels of triterpenoids,bafilomycin A1,and DhEA were increased in the hCC *** abundance of the phylum Chytridiomycota increased as the chronic liver disease progressed and was then replaced by the phylum Ascomycota in *** on the results from clinical human samples,the genus Candida(Ascomycota)(in humans)and the genus Kazachstania(Ascomycota)(in mice)occupied a dominant position in the hCC group,while other fungi were *** increased abundance of *** and depletion of *** may be hallmarks of the progression of liver cirrhosis to early ***,the administration of *** and *** in the LC-hCC progression could accelerate or retard the progression of ***,gut fungi have the potential to serve as a noninvasive clinical biomarker and even a treatment method.

关键词： gut mycobiome liver disease longitudinal studies hepatocarcinogenesis fungal biomarker

Uncovering the hierarchical clusters in the heat-affected zone of an electron beam weldedα/βtitanium alloy joint

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Journal of Materials Science & Technology 2024年第7期174卷 120-132页

作者： C.Xu X.h.Shao h.J.Yang M.lv h.Q.Liu X.L.Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Suzhou laboratory Suzhou 215028China Department of Mechanical Engineering Kyushu UniversityFukuoka 819-0395Japan Bay Area Center for Electron Microscopy Songshan Lake Materials LaboratoryDongguan 523808China

Using high-resolution transmission Kikuchi diffraction(TKD)and transmission electron microscopy(TEM),we examined the hierarchical clusters that form in situ in the heat-affected zone(hAZ),which are com-monly referred to as“ghost”structures,of bimodal titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4Cr(wt%,TC17).The ghost structures are enriched with Al elements but poor in Mo and Cr compared to the surroundingβ*** results show that the ghost structure in middle-hAZ mainly consists ofα_(L)laths with a high-angle grain boundary,which exhibits the classic Burgers orientation relationship(BOR)with the host matrix,while it encircles theα_(P)grains in *** the ghost structure is evidenced to form via in-complete martensitic *** results further confirm that the ghost structure is composed ofαL and tinyβ_(L)laths with BOR,with the former being enriched with Al and poor with Cr and Mo,while the latter is the ***,twoα_(L)variant clusters with a check-mark morphology are fre-quently observed viewed along[0001]_(αL)//[110]_(βL)directions,which are dominated by the crystallographic and geometrical relationships betweenαandβ*** on the microstructural characterization,it is hypothesized that the ghost structure is transformed from the initialα_(P)phase,due to the coupling ef-fect of high thermal stress(which.induces the formation of a large number of dislocations)and element diffusion caused by sudden temperature increase and plunge cooling in the hAZ during the welding pro-cess.

关键词： TC17 titanium alloy Electron beam welding(EBW) The ghost structure Transmission Kikuchi diffraction(TKD) Transmission electron microscopy(TEM)

Spatiotemporal drivers of Nature's contributions to people:A countylevel study

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Environmental Science and Ecotechnology 2024年第4期20卷 323-332页

作者： Wei Jiang Bojie Fu Zhongguo shu Yihe lv Guangyao Gao Xiaoming Feng Stefan Schüler Xing Wu Cong Wang State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesNo.18 Shuangqing Road100085BeijingChina Functional Agrobiodiversity Georg-August-Universit€at G€ottingenGrisebachstraße 637077G€ottingenGermany

Nature's contributions to people(NCP)encompass both the beneficial and detrimental effects of living nature on human quality of life,including regulatory,material,and non-material ***,vital NCPs have been deteriorating,accelerated by changes in both natural and anthropogenic drivers over recent *** the often inevitable trade-offs between NCPs due to th.ir spatially and temporally uneven distributions,few studies have quantitatively assessed the impacts of different drivers on the spatial and temporal changes in multiple NCPs and th.ir *** we evaluate the effects of precipitation,temperature,population,gross domestic product,vegetation restoration,and urban expansion on four key regulatory NCPs-habitat maintenance,climate regulation,water quantity regulation,and soil protection-in Nei Mongol at the county *** observe increasing trends in climate regulation and soil protection from 2000 to 2019,contrasted with declining trends in habitat maintenance and water quantity *** have identified the dominant positive and negative drivers influencing each NCP across individual counties,finding that natural drivers predominantly overpowered anthropogenic ***,we discover significant spatial disparities in the tradeoff or synergy relationships between NCPs across the *** findings illustrate how the impacts of various drivers on NCPs and th.ir interrelationships can be quantitatively evaluated,offering significant potential for application in various spatial *** an understanding of trade-offs and scale effects,these insights are expected to support and inform policymaking at both county and provincial levels.

关键词： Potential regulating contributions Natural and anthropogenic drivers Path analysis Trade-off or synergy relationship China

Enhanced activation of peroxymonosulfate on layered molybdenum disulfide loaded with Co-La bimetallic oxide for efficient degradation of chloramphenicol

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Rare Metals 2024年第9期43卷 4628-4635页

作者： Yu-Ning Fan Yun-Qiu Zhang San-shuang Gao Zeng-h.i Bi Yin Wang shu-Xing Zhou Qian Liu Tian-Ping lv Guang-Zhi hu institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming 650504China hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China institute for Advanced Study Chengdu UniversityChengdu 610106China

The use of transition metal-activated peroxymonosulfate(PMS)as an advanced oxidation technology has gained *** study developed a catalyst using cobaltDlanthanum bimetallic oxide supported on layered molybdenum disulfide(Mo S_(2))as a *** CoDLa/Mo S_(2)catalyst was synthesised through coprecipitation,followed by calcination with an optimised metal ratio of Co:La=2:1 to activate PMS and degrade trace chloramphenicol(CAP)in *** chemical composition of the catalyst was confirmed using X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).At catalyst and PMS dosages of 0.1 and 0.5 g·L^(-1),respectively,the degradation rate of CAP was 95%with.in 30 *** catalyst exhibitedstrong resistance to most interfering anions and maintained a high degradation rate at p h *** chromatographyDmass spectrometry analysis revealed the potential degradation pathways of CAP in the CoDLa/Mo S_(2)(2:1)/PMS *** other pollutants,such as oxytetracycline,complete degradation was achieved within 20 min,demonstrating the broad applicability of the CoDLa/Mo S_(2)(2:1)/PMS system for the degradation and removal of antibiotic organic contaminants.

关键词： catalyst molybdenum disulfide