检索结果-南通市图书馆

Journal of Energy chemistry 2024年第1期88卷 513-520,I0011页

作者： Feng Zhou Xiaofeng ke Yihuang chen Mei Zhao Yun Yang Youqing Dong chao Zou Xi’an chen Huile Jin Lijie Zhang Shun Wang key Laboratory of carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325000ZhejiangChina Zhejiang Engineering Research center for Electrochemical Energy Materials and Devices Institute of New Materials&Industry TechnologyWenzhou UniversityWenzhou 325000ZhejiangChina

The scarcity,high cost and susceptibility to cO of Platinum severely restrict its application in alkaline hydrogen oxidation reaction(HOR).Hybridizing Pt with other transition metals provides an effective strategy to modulate its catalytic HOR performance,but at the cost of mass activity due to the coverage of modifiers on Pt ***,we constructed dual junctions'Pt/nitrogen-doped carbon(Pt/Nc)andδ-Moc/Nc to modify electronic structure of Pt via interfacial electron transfer to acquire Pt-Moc@Nc catalyst with electron-deficient Pt nanoparticles,simultaneously endowing it with high mass activity and durability of alkaline ***,the unique structure of Pt-Moc@Nc endows Pt with a high cOtolerance at 1,000 ppm cO/H_(2),a quality that commercial Pt-c catalyst *** theoretical calculations not only confirm the diffusion of electrons from Pt/Nc to Mo c/Nc could occur,but also demonstrate the negative shift of Pt d-band center for the optimized binding energies of*H,*OH and cO.

关键词： Hydrogen oxidation reaction Dual junctions cO-tolerance Platinum

cr-induced fusion reactions to synthesize superheavy elements

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第5期35卷 122-130页

作者： S.Madhu H.c.Manjunatha N.Sowmya b.M.Rajesh L.Seenappa R.S.Susheela Department of Physics R V College of EngineeringBangalore 560074India Visvesvaraya Technological University BelagaviKarnataka 590018India Department of Physics Government First Grade CollegeSrinivasapurKarnataka 563135India Department of Physics Government First Grade CollegeDevanahallyKarnataka 562110India Department of Physics Government First Grade CollegeMulbagalKarnataka 563131India Department of Physics Government First Grade collegeNanjangudOoty RoadMysore 571301India

We investigated ^(50,52-54)cr-induced fusion reactions for the synthesis of the superheavy element in the 104≤Z≤122 *** cross sections produced in this investigation using ^(54)cr projectiles were compared with those obtained in prior *** estimated cross sections from this analysis are consistent with the findings of prior *** the current study,the predicted cross section was found to be 42fb at 236 MeV for ^(53)cr+^(243)Am,23.2 fb at 236 MeV for ^(54)cr+^(247)cm,95.6 fb at 240 MeV for ^(53)cr+248bk,and 1.33 fb at 242 MeV for ^(53)cr+***,these projected cross sections with excitation energy and beam energy will be useful in future cr-induced fusion reaction investigations.

关键词： Fusion cross sections compound nucleus formation probability Survival probability Evaporation residue cross sections

A quantum blind signature scheme based on dense coding for non-entangled states

在线全文

学校读者我要写书评

暂无评论

chinese Physics b 2024年第6期33卷 220-228页

作者：邢柯殷爱菡薛勇奇 Department of Information Engineering East China Jiaotong UniversityNanchang 330013China

In some schemes, quantum blind signatures require the use of difficult-to-prepare multiparticle entangled states. by considering the communication overhead, quantum operation complexity, verification efficiency and other relevant factors in practical situations, this article proposes a non-entangled quantum blind signature scheme based on dense encoding. The information owner utilizes dense encoding and hash functions to blind the information while reducing the use of quantum resources. After receiving particles, the signer encrypts the message using a one-way function and performs a Hadamard gate operation on the selected single photon to generate the signature. Then the verifier performs a Hadamard gate inverse operation on the signature and combines it with the encoding rules to restore the message and complete the *** with some typical quantum blind signature protocols, this protocol has strong blindness in privacy protection,and higher flexibility in scalability and application. The signer can adjust the signature operation according to the actual situation, which greatly simplifies the complexity of the signature. by simultaneously utilizing the secondary distribution and rearrangement of non-entangled quantum states, a non-entangled quantum state representation of three bits of classical information is achieved, reducing the use of a large amount of quantum resources and lowering implementation costs. This improves both signature verification efficiency and communication efficiency while, at the same time, this scheme meets the requirements of unforgeability, non-repudiation, and prevention of information leakage.

关键词： quantum blind signature dense coding non-entanglement Hadamard gate

Anti-inflammatory germacrane-type sesquiterpene lactones from Vernonia sylvatica

在线全文

学校读者我要写书评

暂无评论

chinese Journal of Natural Medicines 2024年第6期22卷 568-576页

作者： WANG Min LI Han HU bintao TANG chunping XU Hui ke changqiang XIE Zuoquan YE Yang YAO Sheng State key Laboratory of Drug Research&Natural Products Research center Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of chinese Academy of Sciences Beijing 100049China School of Life Science and Technology Shanghai Tech UniversityShanghai 201210China State key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Zhongshan Institute for Drug Discovery Shanghai Institute of Materia MedicaChinese Academy of SciencesZhongshan 528400China

Nine new germacranolides,sylvaticalides A−H(1-9),and three known analogues(10-12)were isolated from the aeri-al part of Vernonia *** structures were established using comprehensive spectroscopic analysis,including high-resolution electrospray ionization mass spectroscopy(HR-ESI-MS)and 1D and 2D nuclear magnetic resonance(NMR)*** absolute configurations were determined by X-ray diffraction *** anti-inflammatory activities of all isolated compounds were as-sessed by evaluating their inhibitory effects on the nuclear factor kappa b(NF-κb)pathway,which was activated by lipopolysacchar-ide(LPS)-stimulated human THP1-Dual cells,and the interferon-stimulated gene(ISG)pathway,activated by STING agonist MSA-2 in the same cell *** 1,2 and 6 showed inhibitory effects on the NF-κb and ISG signaling pathways,with Ic_(50)values ranging from 4.12 to 10.57μmol·L^(−1).

关键词： Vernonia sylvatica Germacrane-type sesquiterpene lactone Sylvaticalides A−H Anti-inflammatory NF-κb path-way ISG pathway

Oxygen‑coordinated Single Mn Sites for Efficient Electrocatalytic Nitrate Reduction to Ammonia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第1期16卷 147-159页

作者： Shengbo Zhang Yuankang Zha Yixing Ye ke Li Yue Lin Lirong Zheng Guozhong Wang Yunxia Zhang Huajie Yin Tongfei Shi Haimin Zhang Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of china Hefei 230026People’s Republic of China key Laboratory of Agricultural Sensors Ministry of AgricultureSchool of Information and ComputerAnhui Agricultural UniversityHefei 230026People’s Republic of China Hefei National Research center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026People’s Republic of China beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of Sciences19B Yuquan RoadBeijing 100049People’s Republic of China

Electrocatalytic nitrate reduction reaction has attracted increasing attention due to its goal of low carbon emission and environmental ***,we report an efficient NitRR catalyst composed of single Mn sites with atomically dispersed oxygen(O)coordination on bacterial cellulose-converted graphitic carbon(Mn-O-c).Evidence of the atomically dispersed Mn-(O-c_(2))_(4)moieties embedding in the exposed basal plane of carbon surface is confirmed by X-ray absorption *** a result,the as-synthesized Mn-O-c catalyst exhibits superior NitRR activity with an NH_(3)yield rate(RNH_(3))of 1476.9±62.6μg h^(−1)cm^(−2)at−0.7 V(*** hydrogen electrode,RHE)and a faradaic efficiency(FE)of 89.0±3.8%at−0.5 V(***)under ambient ***,when evaluated with a practical flow cell,Mn-O-c shows a high RNH_(3)of 3706.7±552.0μg h^(−1)cm^(−2)at a current density of 100 mA cm−2,2.5 times of that in the H *** in situ FT-IR and Raman spectroscopic studies combined with theoretical calculations indicate that the Mn-(O-c_(2))_(4)sites not only effectively inhibit the competitive hydrogen evolution reaction,but also greatly promote the adsorption and activation of nitrate(NO_(3)^(−)),thus boosting both the FE and selectivity of NH_(3)over Mn-(O-c_(2))_(4)sites.

关键词： Atomically dispersed Oxygen coordination Nitrate reduction reaction In situ spectroscopic studies Hydrogen evolution reaction

Effects of heat treatment on microstructures and properties of a heterostructured alloy with dissimilar components fabricated by WAAM

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第9期43卷 4441-4461页

作者： Ming-cai Pan Jun-Qiang Xu Yong Peng Ning-Ning Liang Si Lan Qi Zhou ke-Hong Wang School of Materials Science and Engineering Nanjing University of Science and Technology key Laboratory of controlled Arc Intelligent Additive Manufacturing Technology

Heat treatment significantly influences homogeneous material microstructures and mechanical properties, which can be improved by an optimal heat treatment process. However, heat treatment application to heterogeneous materials presents significant challenges due to compositional and microstructural heterogeneities. Herein,a laminated heterostructured alloy comprising alternating316L stainless steel（SS） and 18Ni300 maraging steel（MS）layers fabricated using wire and arc additive manufacturing was investigated. A solution treatment was applied at900 °c for 0.5 h. Subsequently, the solution-treated and asfabricated（AF） samples were aged at 500 °c for 4 h; these samples were denoted SA and AT, respectively. The AT phase compositions and orientations were similar to those of AF. The SA 316L SS layer resembled that of AF, but the SA 18Ni300 MS layers exhibited a reduced austenite phase fraction and refined grain size, attributable to solid-state transformation. In the AT sample, aging induced the formation of nanoscale acicular ω phase and ellipsoidal Ni3Ti,Fe2Mo, and X precipitates in the 18Ni300 MS ***, the SA precipitates contained acicular Fe Ni2and ellipsoidal ω, Ni3Ti, and X precipitates, and their fractions were lower than those in AT precipitates. The18Ni300 MS layer microhardness in the heat-treated samples increased due to nanoprecipitation, but the 316L SS layer microhardness resembled that of AF. The AT and SA ultimate tensile strengths increased to（1360 ± 50） and（1473 ± 41） MPa, respectively, attributable to precipitation strengthening. The SA 316L SS layer exhibited a high stress-induced martensite fraction, enhancing the ductility of heated samples.

关键词： Heat treatment Laminated heterostructured alloy Mechanical property Microstructure Wire and arc additive manufacturing

Highly efficient catalyst for 1,1,2-trichloroethane dehydrochlorination via bN_(3) frustrated Lewis acid-base pairs

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第6期17卷 4773-4781页

作者： Yuxue Yue Fangmin Zuo bolin Wang Xiaoling Xian Jun Tang Haifeng Zhang Zilong Zhang Qingping ke Wei chen School of chemical Engineering Northeast Electric Power UniversityJilin 132012China Industrial catalysis Institute of Zhejiang University of Technology Hangzhou 310014China key Laboratory of carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China college of chemistry and chemical Engineering Anhui University of TechnologyMaanshan 243002China

In this study,a novel non-metallic carbon-based catalyst co-doped with boron and nitrogen(b,N)was successfully *** precisely controlling the carbonization temperature of a binary mixed ionic liquid,we selectively modified the doping site structure,ultimately constructing a b,N co-doped frustrated Lewis acid-base pair *** catalyst exhibited remarkable catalytic activity,selectivity,and stability in the dehydrochlorination reaction of 1,1,2-trichloroethane(TcE).Detailed characterization and theoretical calculations revealed that the primary active center of this catalyst was the bN_(3)*** to conventional graphitic N structures,the bN_(3)structure had a higher p-band center,ensuring superior adsorption and activation capabilities for TcE during the *** the bN_(3)site,three negatively charged nitrogen atoms acted as Lewis bases,while positively charged boron atoms acted as Lewis *** synergistic interaction facilitated the specific dissociation of chlorine and hydrogen atoms from TcE,significantly enhancing the 1,1-dichloroethene *** this research,we not only explored the active site structure and catalytic mechanism of b,N co-doped catalysts in depth but also provided an efficient,selective,and stable catalyst for the dehydrochlorination of TcE,contributing significantly to the development of non-metallic catalysts.

关键词： b N co-doped sites dehydrochlorination frustrated Lewis acid-base pairs catalytic mechanism

Improvement of hepatic fibrosis after tenofovir disoproxil fumarate switching to tenofovir alafenamide for three years

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Hepatology 2024年第7期16卷 1009-1017页

作者： Tung Huynh Delana MyAn bui Tina Xiwen Zhou ke-Qin Hu Department of Pharmacy University of California Irvine Medical CenterOrangeCA 92868United States University of Houston HoustonTX 77204United States chicago Medical School at Rosalind Franklin University North ChicagoIL 60064United States Division of Gastroenterology and Hepatology University of California IrvineSchool of MedicineOrangeCA 92868United States

bAcKGROUND both tenofovir alafenamide(TAF)and tenofovir disoproxil fumarate(TDF)are the first-line treatments for chronic hepatitis b(cHb).We have showed switching from TDF to TAF for 96 weeks resulted in further alanine aminotransferase(ALT)improvement,but data remain lacking on the long-term benefits of TDF switching to TAF on hepatic *** To assess the benefits of TDF switching to TAF for 3 years on ALT,aspartate aminotransferase(AST),and hepatic fibrosis improvement in patients with *** A single center retrospective study on 53 patients with cHb who were initially treated with TDF,then switched to TAF to determine dynamic patterns of ALT,AST,AST to platelet ratio index(APRI),fibrosis-4(FIb-4)scores,and shear wave elastography(SWE)reading improvement at switching week 144,and the associated *** The mean age was 55(28-80);45.3%,males;15.1%,clinical cirrhosis;mean baseline ALT,24.8;AST,25.7 U/L;APRI,0.37;and FIb-4,*** 144 weeks TDF switching to TAF,mean ALT and AST were reduced to 19.7 and 21,*** baseline to switching week 144,the rates of ALT and ASTcreased;hepatic fibrosis was also improved by APRIb-4ctively;mean APRI was reduced to 0.27;FIb-4,to 1.38;and mean SWE reading,from 7.05 to 6.30 kPa after a mean of 109 weeks *** renal function was stable and the frequency of patients with glomerular filtration rate>60 mL/min was increased from 86.5%at baseline to 88.2%at switching week *** Our data confirmed that switching from TDF to TAF for 3 years results in not only persistent ALT/AST improvement,but also hepatic fibrosis improvement by APRI,FIb-4 scores,as well as SWE reading,the important clinical benefits of long-term hepatitis b virus antiviral treatment with TAF.

关键词： Tenofovir alafenamide Tenofovir disoproxil fumarate Switching Hepatic fibrosis improvement Aspartate aminotransferase to platelet ratio index Fibrosis-4 Shear wave elastography

Enhancing efficiency and stability of organic solar cells through a simplified four-step synthesis of fully non-fused ring electron acceptor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy chemistry 2024年第6期93卷 601-608,I0015页

作者： chenyang Han Huanhuan Gao Yanna Sun Yuanyuan Kan Zhaozhao bi Wei Ma Yani Zhang Juan Antonio Zapien Yingguo Yang ke Gao college of New Energy Xi’an Shiyou UniversityXi’an 710065ShaanxiChina Shandong Provincial key Laboratory for Science of Material creation and Energy conversion Institute of Frontier ChemistrySchool of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237ShandongChina State key Laboratory for Mechanical behavior of Materials Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 99907China School of Microelectronics Fudan UniversityShanghai 200433China

Design and synthesis of superior cost-effective non-fullerene acceptors(NFAs)are still big challenges for facilitating the commercialization of organic solar cells(OScs),yet to be ***,two medium bandgap fully non-fused ring electron acceptors(NFREAs,medium bandgap,i,e.,1,3-1,8 eV),namely PTR-2cl and PTR-4cl are synthesized with only four steps by using intramolecular noncovalent interaction central core,structured alkyl side chain orientation linking units and flanking with different electron-withdrawing end *** them,PTR-4c1 exhibits increased average electrostatic potential(ESP)difference with polymer donor,enhanced crystallinity and compactπ-πstacking compared with the control molecule *** a result,the PTR-4cl-based OSc achieved an impressive power conversion efficiency(PcE)of 14.72%,with a much higher open-circuit voltage(V_(Oc))of 0.953 V and significantly improved fill factor(FF)of 0.758,demonstrating one of the best acceptor material in the top-performing fully NFREA-based OScs with both high PcE and V_(Oc).Notably,PTR-4cl-based cells maintain a good T_80lifetime of its initial PcE after over 936 h under a continuous thermal annealing treatment and over1300 h T_(80)lifetime without *** work provides a cost-effective design strategy for NFREAs on obtaining high V_(Oc),efficient exciton dissociation,and ordered molecular packing and thus high-efficiency and stable OScs.

关键词： Organic solar cells Fully non-fused ring acceptors End group engineering Morphology regulation High efficiency

construction of a nomogram model to predict technical difficulty in performing laparoscopic sphincter-preserving radical resection for rectal cancer

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第18期30卷 2418-2439页

作者： Xiao-cong Zhou Shi-Wei Guan Fei-Yue ke Gaurav Dhamija Qiang Wang bang-Fei chen Medical University(Wenzhou central Hospital) Wenzhou 325000Zhejiang ProvinceChina Department of Hepatobiliary Surgery The Dingli Clinical Institute of Wenzhou Medical University(Wenzhou Central Hospital)Wenzhou 325000Zhejiang ProvinceChina Postgraduate Training base Alliance of Wenzhou Medical University Wenzhou Central HospitalWenzhou 325000Zhejiang ProvinceChina School of International Studies Wenzhou Medical UniversityWenzhou Central HospitalWenzhou 325000Zhejiang ProvinceChina Department of Radiology The Dingli Clinical Institute of Wenzhou Medical University(Wenzhou Central Hospital)Wenzhou 325000Zhejiang ProvinceChina Department of colorectal Surgery The Affiliated Zhejiang HospitalZhejiang University School of Medicine(Zhejiang Hospital)Hangzhou 310000Zhejiang ProvinceChina

bAcKGROUND colorectal surgeons are well aware that performing surgery for rectal cancer becomes more challenging in obese patients with narrow and deep pelvic ***,it is essential for colorectal surgeons to have a comprehensive understanding of pelvic structure prior to surgery and anticipate potential surgical *** To evaluate predictive parameters for technical challenges encountered during laparoscopic radical sphincter-preserving surgery for rectal *** We retrospectively gathered data from 162 consecutive patients who underwent laparoscopic radical sphincterpreserving surgery for rectal ***-dimensional reconstruction of pelvic bone and soft tissue parameters was conducted using computed tomography(cT)*** difficulty was categorized as either high or low,and multivariate logistic regression analysis was employed to identify predictors of operative difficulty,ultimately creating a *** Out of 162 patients,21(13.0%)were classified in the high surgical difficulty group,while 141(87.0%)were in the low surgical difficulty *** logistic regression analysis showed that the surgical approach using laparoscopic intersphincteric dissection,intraoperative preventive ostomy,and the sacrococcygeal distance were independent risk factors for highly difficult laparoscopic radical sphincter-sparing surgery for rectal cancer(Pconversely,the anterior-posterior diameter of pelvic inlet/sacrococcygeal distance was identified as a protective factor(Pbsequently constructed,demonstrating good predictive accuracy(c-index=0.834).cONcLUSION The surgical approach,intraoperative preventive ostomy,the sacrococcygeal distance,and the anterior-posterior diameter of pelvic inlet/sacrococcygeal distance could help to predict the difficulty of laparoscopic radical sphincter-preserving surgery.

关键词： Nomogram Rectal cancer Laparoscopic operation Sphincter-preserving surgery Technical difficulty