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Cr-induced fusion reactions to synthesize superheavy elements

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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

Effect of radiative loss mechanisms on FIR thermometric parameters of Nd^(3+)-doped lithium tellurite glasses

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Journal of Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： C.Y.Morassuti A.P.L Silva L.A.O.Nunes S.M.Lima L.h.C.Andrade Optical and Photothermal Spectroscopy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Archer Information Technology Center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of Physics of São Carlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tellurite glasses are promising materials for thermometers based on the fluorescence intensity ratio(FIR)***,at high Nd^(3+)concentrations,energy transfer(ET)processes such as optical reabsorption and cross-relaxation can affect the Nd^(3+)emission,which has been little explored in the ***,the present work investigated the use of Nd^(3+)-doped tellurite glass(samples doped with Nd^(3+)at 0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in fluorescence thermometers,in the temperature range from 299 to 371 *** results indicate a strong dependence of the FIR parameters on the Nd^(3+)concentration,due to changes in the emission band profiles caused by optical reabsorption of the Nd^(3+)emissions and cross-relaxation processes.A decrease of the relative sensitivity of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for samples doped with higher amounts of Nd^(3+).The maximum relative sensitivity at 299 K is 3.00%/K,which is the highest value among the reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tellurite glass Fluorescence intensity ratio Optical thermometry Judd-Ofelt Rare earths

Exact solutions for magnetohydrodynamic nanofluids flow and heat transfer over a permeable axisymmetric radially stretching/shrinking sheet

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Chinese Physics B 2024年第2期33卷 108-114页

作者： U.S.Mahabaleshwar G.P.Vanitha L.M.Pérez Emad h.Aly I.Pop Department of Studies in Mathematics Davangere UniversityShivagangothriDavangereIndia Departamento de F´ısica FACIUniversidad de Tarapac´aCasilla 7DAricaChile Department of Mathematics Faculty of EducationAin Shams UniversityRoxyCairoEgypt Department of Mathematics Babes-Bolyai University400084 Cluj-NapocaRomania

We report on the magnetohydrodynamic impact on the axisymmetric flow of Al_(2)O_(3)/Cu nanoparticles suspended in h_(2)O past a stretched/shrinked *** the use of partial differential equations and the corresponding thermophysical characteristics of nanoparticles,the physical flow process is *** resultant nonlinear system of partial differential equations is converted into a system of ordinary differential equations using the suitable similarity *** transformed differential equations are solved *** of the magnetic parameter,solid volume fraction and stretching/shrinking parameter on momentum and temperature distribution have been analyzed and interpreted *** skin friction and Nusselt number were also *** addition,existence of dual solution was deduced for the shrinking sheet and unique solution for the stretching ***,Al_(2)O_(3)/h_(2)O nanofluid flow has better thermal conductivity on comparing with Cu/h_(2)O ***,it was found that the first solutions of the stream are stable and physically realizable,whereas those of the second ones are unstable.

关键词： magnetohydrodynamic nanofluid stretching/shrinking sheet axisymmetric flow analytical solution suction/injection

学龄前孤独症谱系障碍儿童健康体适能水平及影响因素

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中国康复医学杂志 2024年第3期39卷 347-354,381页

作者：李鑫李颖妍庞伟杨婷婷俞鑫璐王安利北京体育大学北京市100084 佳木斯大学佳木斯大学康复医学院佳木斯大学附属第三医院黑龙江省儿童神经康复重点实验室

目的:初步研究学龄前孤独症谱系障碍(autism spectrum disorder,ASD)儿童健康体适能水平,探讨ASD儿童健康体适能的影响因素,为其全面康复治疗和家庭运动指导提供参考。方法:选取ASD组儿童50例和正常组儿童50例,健康体适能水平采用身体... 详细信息

目的:初步研究学龄前孤独症谱系障碍(autism spectrum disorder,ASD)儿童健康体适能水平,探讨ASD儿童健康体适能的影响因素,为其全面康复治疗和家庭运动指导提供参考。方法:选取ASD组儿童50例和正常组儿童50例,健康体适能水平采用身体质量指数、20m往返跑距离、网球掷远距离、立定跳远距离、等长俯卧撑时长、单脚站时长平均值、坐位体前屈距离7个指标,收集整理ASD儿童的影响因素情况。分析学龄前ASD儿童与正常儿童之间的健康体适能水平差异,采用多元线性回归模型分析性别、BMI、平均每天睡眠时间、平均每天久坐时间、平均每天TPA时间、平均每天MVPA时间、母亲文化水平、父亲文化水平、家庭收入、儿童主要看护人年龄对学龄前ASD儿童健康体适能影响。结果:组间对比分析结果显示ASD组网球掷远距离低于正常组(P0.05)。多元线性回归模型分析显示平均每天睡眠、总体力活动(total physical activity,TPA)、中高强度体力活动(moderate to vigorous intensity physical activity,MVPA)时间对20m往返跑距离有良好拟合作用(20m往返跑距离=﹣9.561+1.048×平均每天睡眠时间+0.076×均每天TPA时间+0.066×平均每天MVPA时间);平均每天TPA时间对等长俯卧撑时长有良好拟合作用(等长俯卧撑时长=﹣87.625+0.428×平均每天TPA时间);平均每天TPA、MVPA时间对单脚站时长平均值有良好拟合作用(单脚站时长平均值=6.627+0.094×平均每天总身体活动时间+0.071×平均每天中高强度活动时间)。结论:学龄前ASD儿童的心肺适能、运动适能、上肢肌肉适能低于正常儿童,综合康复干预方案应适当加入体适能训练。学龄前ASD儿童睡眠时间越长、TPA时间越长、MVPA时间越长可能心肺适能、运动适能越好,应增强学龄前ASD儿童睡眠时间和中高强度体力活动的有效时长。

关键词：学龄前儿童孤独症谱系障碍健康体适能

Ultrafast magneto-optical dynamics in nickel(111)single crystal studied by the integration of ultrafast reflectivity and polarimetry probes

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Chinese Physics B 2024年第3期33卷 65-69页

作者：匡皓余军潇陈洁 h.E.Elsayed-Ali 李润泽 Peter M.Rentzepis School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Center for Ultrafast Science and Technology Key Laboratory for Laser Plasmas (Ministry of Education)Collaborative Innovation Center of IFSA (CICIFSA)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Department of Electrical and Computer Engineering Old Dominion UniversityNorfolkVirginia 23529USA Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTexas 77843USA

With the integration of ultrafast reflectivity and polarimetry probes,we observed carrier relaxation and spin dynamics induced by ultrafast laser excitation of Ni(111)single *** carrier relaxation time within the linear excitation range reveals that electron-phonon coupling and dissipation of photon energy into the bulk of the crystal take tens of *** the other hand,the observed spin dynamics indicate a longer time of about 120 *** further understand how the lattice degree of freedom is coupled with these dynamics may require the integration of an ultrafast diffraction probe.

关键词： ultrafast spin dynamics non-equilibrium dynamics multi-probe

The elevation gradient of stable isotopes in precipitation in the eastern margin of Tibetan Plateau

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Science China Earth Sciences 2022年第10期65卷 1972-1984页

作者： Jie LI Zhonghe pang Engineering Research Center of Groundwater Pollution Control and Remediation of Ministry of Education College of Water SciencesBeijing Normal UniversityBeijing 100875China Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy of Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Frontiers Science Center for Critical Earth Material Cycling Nanjing UniversityNanjing 210008China

Tibetan Plateau(TP)receives moistures from different directions,so variations of isotope elevation gradient on different sides may *** this study,we systematically monitored and modeled the elevation effect of stable isotopes in precipitation of the eastern margin of the Tibetan Plateau,where we collected 265 water samples for stable isotope(δ2h.andδ^(18)O)analyses,of which 70 are eventful rainfall samples,and 195 are surface water samples,for *** lakes on the mountain peaks were used to reconstruct the average isotope composition of the local precipitation based on the evaporation *** elevation gradient of−4.2‰km^(−1)(R^(2)=0.93)was established for the eastern marginal region of *** elevation gradient was further confirmed by fractionation assessment using the Rayleigh fractionation *** is the highest ever reported for the TP and it is the highest as compared to those of all the other slopes as well as that of the interior part of the *** isotopes in the interior of TP show a lower elevation gradient,which is likely caused by significant local moisture *** paper also discusses the limitations of using river water samples to construct the elevation gradient.

关键词： Elevation gradient Stable isotopes Rayleigh fractionation Moisture recycling Tibetan Plateau

Trauma to the solid abdominal organs:The missed dark box of colonoscopy

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World Journal of Gastroenterology 2024年第7期30卷 624-630页

作者： Mohamed h Emara Usama Mazid Yasmine A Elshaer Mahmoud A Elkerdawy Dilaver Farooq Malik Aya M Mahros Department of hepatology Gastroenterologyand Infectious DiseasesKafrelsheikh UniversityKafr-Elshikh 33516Egypt Department of Medicine Alyousif HospitalAlkhobar 31952Saudi Arabia

Colonoscopy is an integral part of the lower bowel care and is generally considered a potentially safe diagnostic and therapeutic procedure performed as a daycare outpatient *** is associated with different complications that are not limited to adverse events related to the bowel preparation solutions used,the sedatives used,but to the procedure related as well including bleeding and *** to the extra-luminal abdominal organs during colonoscopy are uncommon,however,serious complications related to the procedure have been reported infrequently in the *** threatening injuries to the spleen,liver,pancreas,mesentery,and urinary bladder have been reported as early as in *** injuries should not be overlooked by clinicians and *** increasing abdominal pain,abdominal distension,and hemodynamic instability in absence of rectal bleeding should raise the possibility of severe organ *** and hepatic injury following colonoscopy are usually serious and may be life *** conservative management may help,yet they usually need interventional radiology or surgical *** pancreatitis following colonoscopy is usually mild and is mostly managed *** mechanism of abdominal organ injuries during colonoscopy is not fully understood,however many risk factors have been identified,which can be classified as-organ related,procedure related,and local abdominal *** colonoscopy and prior intra-abdominal adhesions are probably the most relevant risk factors for these *** lateral position,avoidance of looping and excessive force during the procedure would probably reduce the risk of such injuries.

关键词： Colonoscopy Pancreatitis Trauma Complications Adhesions

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钒钛磁铁矿还原-磨选工艺分离铁钛试验

钢铁 2024年第8期59卷 13-18+49页

作者：罗林根庞建明李新宋耀欣王华林银河郑权柴先义中国钢研科技集团有限公司资源应用与合金材料事业部马鞍山钢铁股份有限公司特钢公司长江师范学院化学化工学院中冶华天南京工程技术有限公司钢铁设计研究总院安徽首矿大昌金属材料有限公司炼钢事业部

以攀西钒钛磁铁矿为研究对象，分析了攀西钒钛磁铁矿综合利用工艺方案现状。考虑到传统工艺采用碳质还原剂或加入添加剂还原后产品中有过量的碳和添加剂残留，将对制得的产品造成污染，尤其是钠盐添加剂更是一种环境污染因子，工业化处... 详细信息

以攀西钒钛磁铁矿为研究对象，分析了攀西钒钛磁铁矿综合利用工艺方案现状。考虑到传统工艺采用碳质还原剂或加入添加剂还原后产品中有过量的碳和添加剂残留，将对制得的产品造成污染，尤其是钠盐添加剂更是一种环境污染因子，工业化处理成本较高等弊端，提出采用氢气还原-磨选工艺处理钒钛磁铁矿以实现铁、钛2种元素的分离。研究过程先对钒钛磁铁矿用氢气还原，使矿中的铁氧化物绝大部分还原为金属铁，再通过细磨磁选分离钛和铁元素。研究表明，在1 200℃还原4 h，钒钛磁铁矿金属化率可达86.21%；还原钒钛磁铁矿经细磨60 min，得到粒度D50约为10.5μm的微粒，在磁场强度为80 m T条件下进行湿式磁选，可得到TFe质量分数为89.34%、TiO2质量分数为0.83%、V2O5质量分数为0.33%的金属铁粉和TFe质量分数为6.22%、TiO2质量分数为36.82%、V2O5质量分数为2.35%的非磁性物，从而实现铁钛元素的分离。还原-磨选工艺应用于钒钛磁铁矿的铁、钛元素分离有较好的效果，获得的金属铁粉铁含量高、铁收率高，同时渣中钒、钛元素得到有效富集有利于后续提取钒、钛元素；氢气作为还原剂不会带来二次污染。还原-磨选工艺有望实现钒钛磁铁矿综合利用，有较好的应用前景，可进一步开展更大规模试验研究。

关键词：氢还原直接还原铁钛分离钒钛磁铁矿磁选

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DPY19L3 promotes vasculogenicmimicry by its C-mannosyltransferase activity

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Oncology Research 2024年第4期32卷 607-614页

作者： hASSAN BAYDOUN YUJI KATO hIROKI KAMO ANNA hÜSCh hAYATO MIZUTA RYOTA KAWAhARA SIRO SIMIZU Department of Applied Chemistry Faculty of Science and TechnologyKeio UniversityYokohama223-8522Japan Department of Pharmacy and Biochemistry Faculty of ScienceUniversity of TübingenTübingen72074Germany

C-mannosylation is a post-translational modification that occurs intracellularly in the endoplasmic *** humans,biosynthesis of C-mannosylation in proteins containing thrombospondin type 1 repeat is catalyzed by the DPY19 family;nonetheless,biological functions of protein C-mannosylation are not yet fully understood,especially in tumor *** mimicry(VM)is the formation of fluid-conducting channels by highly invasive and genetically deregulated tumor cells,enabling the tumors to form matrix-embedded vasculogenic structures,containing plasma and blood cells to meet the metabolic demands of rapidly growing *** this study,we focused on DPY19L3,a C-mannosyltransferase,and aimed to unravel its role in *** of DPY19L3 inhibited the formation of VM in hT1080 human fibrosarcoma ***-expression of wild-type DPY19L3 recovered VM formation;however,DPY19L3 isoform2,an enzymatic activity-defect mutant,did not restore it,suggesting that the C-mannosyltransferase activity of DPY19L3 is crucial to its ***,the knockdown of DPY19L3 in MDA-MB-231 breast cancer cells hindered its network formation ***,our findings suggest that DPY19L3 is required for VM formation and stipulate the relevance of C-mannosylation in oncogenesis.

关键词： C-mannosylation Vasculogenic mimicry DPY19L3