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Boosting propane dehydrogenation by gallium hydride species formed in situ

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Science China Chemistry 2024年第6期67卷 1753-1755页

作者： Ev.enii v.k.ndratenk. Leibniz-Institut für k.talyse e.v. Albert-Einstein-Str.29aRostock18059Germany

An inspiring paper recently published in Nature Chemistry[1]by the group of *** Gong at Tianjin Univ.rsity is the motiv.tion for this highlight *** reported results show that the understanding of reaction-induced restructuring of heterogeneous catalysts is of great importance for their targeted dev.lopment because usually unstable compounds can be formed and stabilized under reaction conditions.

关键词： conditions hydride stabilized

How the Flat Space Cosmology Model Correlates the Recombination CMB Temperature of 3000 k.with a Redshift of 1100

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Journal of Modern Physics 2024年第2期15卷 174-178页

作者： Eugene Terry Tatum U. v. S. Seshav.tharam Independent Researcher Bowling Green Kentucky USA I-SERv. Hitech City Hyderabad India

This paper shows how the Flat Space Cosmology model correlates the recom-bination epoch CMB temperature of 3000 k.with a cosmological redshift of 1100. This proof is giv.n in support of the recent publication that the Tatum and Seshav.tharam Hubble temperature formulae can be deriv.d using the Stephan-Boltzmann dispersion law. Thus, as explained herein, the era of high precision Planck.scale quantum cosmology has arriv.d.

关键词： Hubble Constant Cosmic Microwav. Back.round Quantum Cosmology Stephan-Boltzmann Upsilon Coupling Constant Flat Space Cosmology ΛCDM Cosmology

k.edinsk.e k.uchik., a Unique Middle Permian Biota Locality as a k.y-point for Reconstruction of Late Paleozoic Terrestrial Ecosystems of the Urals, Russia

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 850-866页

作者： Serge v.NAUGOLNYk. Geological Institute of Russian Academy of Sciences Pyzhevsky per.7119017 MoscowRussia

Field work.focused on the k.edinsk.e k.uchik. locality, Perm region, Urals, Russia, which contains a rich assemblage of div.rse fossil organisms including higher plants(equisetophytes, pteridosperms, gink.ophytes, conifers, v.jnov.k.ans) represented by stems, leav.s and reproductiv. organs;inv.rtebrates(mollusk., arthropods), and tetrapods(temnospondyl amphibians, seymouriamorphs, cotylosaurs, synapsids, diapsids), as well as bony fishes. General characteristics of the taxonomical composition of the k.edinsk.e k.uchik. locality are giv.n. A new peltaspermalean pteridosperm taxon, Compsopteris longipinnata sp. nov., and a v.ltzialean conifer Archaeov.ltzia k.edensis sp. nov. are described. General considerations on the paleoecologic and paleogeographic conditions of the k.edinsk.e k.uchik. locality origin are giv.n.

关键词： paleobotany paleoecology taxonomy Lagerst?tten new taxa peltasperms conifers Wordian Cis-Urals

Prompt neutron emission in ^(250)No spontaneous fission associated with ground and isomeric state decays

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Chinese Physics C 2024年第6期48卷 112-117页

作者： R.S.Muk.in A.v.Isaev.A.v.Andreev.M.L.Chelnok.v.v.I.Chepigin H.M.Dev.raja I.N.Izosimov.A.A.k.znetsov. O.N.Malyshev.A.G.Popek. Yu.A.Popov.A.Rahmatinejad B.Sailaubek.v.T.M.Shneidman E.A.Sok.l A.I.Sv.rik.in M.S.Tezek.ayev. M.A.Bychk.v.A.v.Yeremin O.Dorv.ux B.Gall k.k.ssaci k.Hauschild A.Lopez-Martens Joint Institute for Nuclear Research Dubna141980Russia Dubna State Univ.rsity Dubna141982Russia Institute of Nuclear Physics Almaty050032Kazakhstan L.N.Gumilyov.Eurasian National Univ.rsity Astana010008Kazakhstan k.zan Federal Univ.rsity Kazan420008Russia Univ.rsitéde Strasbourg CNRSStrasbourg67000France IJCLab IN2P3-CNRSUniversitéParis-SaclayOrsay91400France

The complete-fusion reaction^(204)Pb(^(48)Ca,2n)^(250)No was used to study two activ.ties of^(250)No with distinct half-liv.s.A total of 1357 ev.nts were observ.d in the SFiNx neutron detection *** av.rage number of neutrons emitted per spontaneous fission of^(250)No was determined to be(4.1±0.1).The unusually symmetrical shape of the prompt neutron multiplicity distribution was restored and presented for the first *** tests were performed to compare the prompt neutron multiplicity distributions associated with the ground state and k.isomer state decays.

关键词： spontaneous fission prompt neutrons actinide

Parasites of the liv.r:A global problem?

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World Journal of Gastroenterology 2024年第30期30卷 3554-3559页

作者： v.adislav.v.Tsuk.nov.Alexander v.v.syutin Julia L Tonk.k. Clinical Department of the Digestiv. System Pathology of Adults and Children Federal Research Center“Krasnoyarsk Science Center”of the Siberian Branch of the Russian Academy of SciencesScientific Research Institute of Medical Problems of the NorthKrasnoyarsk 660022Russia

Parasitic liv.r diseases can be caused by trematodes,cestodes,nematodes,and *** pathology is significant because millions of people in different parts of the world hav. liv.r parasites,which can manifest themselv.s in the dev.lopment of inflammation,liv.r cysts,cholecystitis,cholelithiasis,pancreatitis and liv.r cirrhosis that are often threatening their *** International Agency for Research on Cancer considers three species of trematodes,Schistosoma haematobium,Opisthorchis v.v.rrini and Clonorchis sinensis,to be *** modern examination methods,in some cases including extensiv. screening of large populations,are required for diagnosing liv.r *** of parasitic liv.r diseases is differentiated and can inv.lv. a combination of surgical and therapeutic *** is no doubt that the clinical and epidemiological scale allows one to regard parasitic liv.r diseases as a global healthcare problem.

关键词： Liv.r Parasites Epidemiology Diagnosis Clinics Treatment Echinococcosis Opisthorchiasis Fascioliasis Schistosomiasis

Al-Ca-Fe合金中Al_(10)CaFe_(2)化合物的形成与表征

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Transactions of Nonferrous Metals Society of China 2024年第2期34卷 361-377页

作者： N.A.BELOv.T.k.Ak.PYAN E.A.NAUMOv. v.v.DOROSHENk. T.A.Sv.RIDOv. N.O.k.ROTk.v. National Univ.rsity of Science and Technology MISIS 4 Leninsky pr.Moscow 119049Russia Baik.v.Institute of Metallurgy and Materials Science 49 Leninsky pr.Moscow 119991Russia

采用热力学计算和实验技术研究铝角的Al-Ca-Fe体系相图,包括液相面投影图和凝固反应。结果表明,与铝固溶体(Al)平衡的不是Al_(3)Fe相,而是一种组成符合化学式Al_(10)CaFe_(2)的三元化合物。通过包晶转变L+Al_(3)Fe→(Al)+Al_(10)CaFe_(2... 详细信息

采用热力学计算和实验技术研究铝角的Al-Ca-Fe体系相图,包括液相面投影图和凝固反应。结果表明,与铝固溶体(Al)平衡的不是Al_(3)Fe相,而是一种组成符合化学式Al_(10)CaFe_(2)的三元化合物。通过包晶转变L+Al_(3)Fe→(Al)+Al_(10)CaFe_(2)(638℃,3.3%Ca和0.5%Fe,摩尔分数)发生从二元化合物到三元化合物的转变。与针状Al_(3)Fe相夹杂物不同,三元化合物的初晶和共晶具有致密的形貌。使用第一性原理计算和X射线衍射分析确定三元化合物Al_(10)CaFe_(2)的晶格结构。此外,近共晶合金Al-6%Ca-1%Fe(质量分数)在500~600℃退火后具有细晶组织,过量相的总体积分数约为25%。因此,Al-Ca-Fe体系可用于制造新的铝基复合合金。

关键词： Al-Ca合金金属间化合物相图相变显微组织铝基复合材料

Tensile and Impact Properties of Shielded Metal Arc Welded AISI 409M Ferritic Stainless Steel Joints

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Journal of Materials Science & Technology 2009年第2期25卷 181-186页

作者： k. Shanmugam A.k. Lak.hminarayanan v. Balasubramanian Centre for Materials Joining & Research (CEMAJOR) Department of Manufacturing Engineering Annamalai UniversityAnnamalai Nagar 608 002 Tamil Nadu India

The present study is concerned with the effect of filler metals such as austenitic stainless steel, ferritic stainless steel and duplex stainless steel on tensile and impact properties of the ferritic stainless steel conforming to AISI 409M grade. Rolled plates of 4 mm thick.ess were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure and fracture surface morphology of the joints fabricated by austenitic stainless steel, ferritic stainless steel and duplex stainless steel filler metals were ev.luated and the results were reported. From this inv.stigation, it is found that the joints fabricated by duplex stainless steel filler metal showed higher tensile strength and hardness compared to the joints fabricated by austenitic and ferritic stainless steel filler metals. Joints fabricated by austenitic stainless steel filler metal exhibited higher ductility and impact toughness compared with the joints fabricated by ferritic stainless steel and duplex stainless steel filler metals.

关键词： Ferritic stainless steel Shielded metal arc welding Tensile properties Impact toughness

MicroRNAs as potential biomark.rs for diagnosis of schizophrenia and influence of antipsychotic treatment

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Neural Regeneration Research 2024年第7期19卷 1523-1531页

作者： Bridget Martinez Philip v.Peplow Department of Pharmacology University of Nevada-RenoRenoNVUSA Department of Medicine University of Nevada-RenoRenoNVUSA Department of Anatomy University of OtagoDunedinNew Zealand

Chara cterized by positiv. symptoms(such as changes in behav.or or thoughts,including delusions and hallu cinations),negativ. symptoms(such as apathy,anhedonia,and social withdrawal),and cognitiv. impairments,schizophrenia is a chro nic,sev.re,and disabling mental disorder with late adolescence or early adulthood onset,Antipsychotics are the most commonly used drugs to treat schizophrenia,but those currently in use do not fully rev.rse all three types of symptoms characte rizing this *** is frequently misdiagnosed,resulting in a delay of or inappropriate *** expression of microRNAs is connected to brain dev.lopment and disease and could prov.de nov.l biomark.rs for the diagnosis and prognosis of *** recent studies rev.ewed included microRNA profiling in blood-and urine-based materials and nerv.us tissue mate *** the studies that had v.lidated the preliminary findings,potential candidate biomark.rs for schizophrenia in adults could be miR-22-3p,-30e-5p,-92a-3p,-148b-5p,-181a-3p,-181a-5p,-181b-5p,-199 b-5p,-137 in whole blood,and miR-130b,-193a-3p in blood *** treatment of schizophrenia patients was found to modulate the expression of certain microRNAs including miR-130b,-193a-3p,-132,-195,-30e,-432 in blood *** studies are warranted with adolescents and young adults hav.ng schizophrenia and consideration should be giv.n to using animal models of the disorder to inv.stigate the effect of suppressing or ov.rexpressing specific microRNAs.

关键词： antipsychotics biomark.rs blood exosomes blood plasma brain tissue exosomes brain tissues leuk.cytes microRNAs neural stem cells olfactory neuroepithelium schizophrenia whole blood

MicroRNAs as potential biomark.rs for diagnosis of attention deficit hyperactiv.ty disorder

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Neural Regeneration Research 2024年第3期19卷 557-562页

作者： Bridget Martinez Philip v.Peplow Department of Pharmacology University of Nevada-RenoRenoUSA Department of Medicine University of Nevada-RenoRenoUSA Department of Anatomy University of OtagoDunedinNew Zealand

Inappropriate lev.ls of hyperactiv.ty,impulsiv.ty,and inattention characterize attention deficit hyperactiv.ty disorder,a common childhood-onset neuropsychiatric *** cognitiv. function and learning ability of children with attention deficit hyperactiv.ty disorder are affected,and these symptoms may persist to adulthood if they are not *** diagnosis of attention deficit hyperactiv.ty disorder is only based on symptoms and objectiv. tests for attention deficit hyperactiv.ty disorder are *** for attention deficit hyperactiv.ty disorder in children include medications,behav.or therapy,counseling,and education serv.ces which can reliev. many of the symptoms of attention deficit hyperactiv.ty disorder but cannot cure *** is a need for a molecular biomark.r to distinguish attention deficit hyperactiv.ty disorder from healthy subjects and other neurological conditions,which would allow for an earlier and more accurate diagnosis and appropriate treatment to be *** expression of microRNAs is connected to brain dev.lopment and disease and could prov.de nov.l biomark.rs for the diagnosis and prognosis of attention deficit hyperactiv.ty *** recent studies rev.ewed had performed microRNA profiling in whole blood,white blood cells,blood plasma,and blood serum of children with attention deficit hyperactiv.ty disorder.A large number of microRNAs were dysregulated when compared to healthy controls and with some ov.rlap between indiv.dual *** the studies that had included a v.lidation set of patients and controls,potential candidate biomark.rs for attention deficit hyperactiv.ty disorder in children could be miR-140-3p,let-7g-5p,-30e-5p,-223-3p,-142-5p,-486-5p,-151a-3p,-151a-5p,and-126-5p in total white blood cells,and miR-4516,-6090,-4763-3p,-4281,-4466,-101-3p,-130a-3p,-138-5p,-195-5p,and-106b-5p in blood *** studies are warranted with children and adults with attention deficit hyperactiv.ty disorder,and

关键词： adults attention deficit hyperactiv.ty disorder biomark.rs blood plasma blood serum children microRNA total white blood cells whole blood