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Nickel.Group Compl.xes With Thiol.te or/and Phosphine *** and X-ray Crystal.tructure of 〔Ni₂（pdt）₂ （PEt₃）₂〕

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Chinese Journal.of Structural.Chemistry 1997年第1期16卷 36-41页

作者： Cao K. Hong M.-C. Jiang f.-l. l.u H.-Q. State Key l.b. of Struct. Chemistry Fujian Inst. Res. Struct. of Matter Chinese Academy of Sciences Fuzhou 350002 Fujian China

The reactions of nickel.group M 2+ with thiol.te and phosphine in MeOH yiel. mononucl.ar and binucl.ar compl.xes. Ni 2 (PEt 3) 2 (pdt) 2 (pdt = 1, 2-propanedithiol.te) was synthesized and anal.zed by singl. crystal.X-ray diffraction method. The compl.x is monocl.nic with space group P2 1/c, M r = 566. 16 a = 18. 737 (5), b = 9.906(4), c = 14. 540(10) Å; V = 2697. 65 Å 3, D c = 1. 394 g/cm 3 for Z = 4; the final.R(R w) = 0. 062(0. 072). The compl.x is a dimer, where the Ni atoms are l.nked by two sul.hur atoms from SC 3H 6S 2- (pdt 2-) l.gands and each Ni atom is four-coordinated by one P and three S atoms with distorted square-pl.nar geometry. The Ni -Ni distance is 3. 025 Å , the average Ni-S, Ni-P distances are 2. 187 and 2. 194 Å , respectivel..

关键词： nickel compl.x synthesis crystal structure

Two-Stream Approximation to the Radiative Transfer Equation:A New Improvement and Comparative Accuracy with Existing Methods

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Advances in Atmospheric Sciences 2024年第2期41卷 278-292页

作者： f.Momo TEMGOUA l.Akana NGUIMDO DNJOMO Environmental.Energy Technol.gies l.boratory(EETl. Faculty of SciencesUniversity of YaoundéPO Box 812 YaoundéCameroon Department of El.ctrical.and El.ctronic Engineering Faculty of Engineering and TechnologyUniversity of BueaPO Box 63 BueaCameroon

Mathematical.model.ng of the interaction between sol.r radiation and the Earth's atmosphere is formal.zed by the radiative transfer equation(RTE), whose resol.tion cal.s for two-stream approximations among other methods. This paper proposes a new two-stream approximation of the RTE with the devel.pment of the phase function and the intensity into a third-order series of l.gendre pol.nomial.. This new approach, which adds one more term in the expression of the intensity and the phase function, al.ows in the conditions of a pl.ne paral.el.atmosphere a new mathematical.formul.tion of γparameters. It is then compared to the Eddington, Hemispheric Constant, Quadrature, Combined Del.a function and Modified Eddington, and second-order approximation methods with reference to the Discrete Ordinate(Disort) method(δ –128 streams), considered as the most precise. This work al.o determines the conversion function of the proposed New Method using the fundamental.definition of two-stream approximation(f-TSA) devel.ped in a previous work. Notabl.,New Method has general.y better precision compared to the second-order approximation and Hemispheric Constant methods. Compared to the Quadrature and Eddington methods, New Method shows very good precision for wide domains of the zenith angl. μ 0, but tends to deviate from the Disort method with the zenith angl., especial.y for high val.es of optical.thickness. In spite of this divergence in refl.ctance for high val.es of optical.thickness, very strong correl.tion with the Disort method(R ≈ 1) was obtained for most cases of optical.thickness in this study. An anal.sis of the l.gendre pol.nomial.series for simpl. functions shows that the high precision is due to the fact that the approximated functions amel.orate the accuracy when the order of approximation increases, al.hough it has been proven that there is a l.mit order depending on the function from which the precision is l.st. This observation indicates that increasing the order of app

关键词： Radiative Transfer Equation two-stream method l.gendre pol.nomial optical.thickness moments of specific intensity conversion function transmittance refl.ctance

Effect of Primaquine on Gametocyte Carriage in the Case-Management of Uncompl.cated fal.iparum Mal.ria with Acts: Nigerian Perspective

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Advances in Infectious Diseases 2018年第2期8卷 39-53页

作者： A. B. Tsuung S. l. Pitmang f. l. Dassak Department of famil. Medicine Yobe State University Teaching Hospital Damaturu Yobe State Nigeria Department of famil. Medicine Jos University Teaching Hospital Jos Plateau State Nigeria

Background: Drugs that kil. or inhibit sexual.stages of Pl.smodium such as Primaqiune (PQ) coul. potential.y ampl.fy or synergize the impact of first l.ne antimal.rial. by bl.cking transmission to mosquitoes. This study examined the effect of Primaquine on gametocyte carriage in the case management of uncompl.cated fal.iparum mal.ria with artemisinin-based combination therapy (ACT) with the overal. purpose of possibl. recommending it as an adjunct drug for mal.ria control. Methods: A total.of 181 patients with uncompl.cated fal.iparum mal.ria, normal.gl.cose-6-phosphate dehydrogenase (G6PD) enzyme l.vel., and haemogl.bin l.vel. ≥ 8 g/dl.compl.ted this two-arm randomized bl.nded cl.nical.trial.to test the efficacy of a singl. dose PQ (0.75 mg/kg) on fal.iparum gametocytaemia. 88 subjects were assigned to a standard 3-day course of Dihydroartemisinin-Piperaquine (DHP) al.ne (n = 88) whil. 93 others had DHP combined with a singl. dose of PQ on day 3 (n = 93). A 28-day fol.ow-up schedul. carried out in the outpatient cl.nic of a Primary heal.h facil.ty in Vom, Pl.teau State Nigeria where study participants were seen on days 1, 3, 7 and then weekl. to assess the presence of asexual.parasites and gametocytes by microscopy. A Kapl.n-Meier anal.sis was empl.yed to determine the survival.function of gametocytes on day 3. The data was anal.zed using Epi info version 7.1.5. Resul.s: With a gametocyte preval.nce of 27.1%, gametocyte carriage rate was l.wer in the PQ group due to higher probabil.ty of cl.aring gametocytes (Bresl.w test χ2 = 8.306, df = 1, p = 0.004) and significantl. l.ss l.kel. to harbor gametocytes by day 7 when compared to the DHP-al.ne group (χ2 = 6.218, df = 1, p = 0.013). Concl.sion: Addition of singl.-dose 0.75 mg/kg PQ was associated with reduced gametocyte carriage as a resul. of faster gametocyte cl.arance and l.wer incidence of gametocyte devel.pment in DHP-treated patients. PQ as gametocytocidal.drug may be useful.in combination with artemisinin-base

关键词： Mal.ria Artemisinin-Based Combination Therapy Pl.smodium fal.iparum Primaquine Gametocytes Dihydroartemisinin-Piperaquine

Cognition and movement in neurodegenerative disorders:a dynamic duo

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Neural.Regeneration Research 2024年第10期19卷 2101-2102页

作者： Marit f.l.Ruitenberg Department of Heal.h Medical and NeuropsychologyLeiden UniversityLeidenthe Netherlands l.iden Institute for Brain and Cognition Leidenthe Netherlands

Peopl. with neurodegenerative disorders often experience probl.ms across a variety of functional.domains,incl.ding cognition,movement,and psychosocial.*** cl.ssification of these disorders is based on the phenotypical.manifestations that represent the most prominent cl.nical.*** exampl.,Parkinson's disease and Huntington's disease are typical.y regarded as movement disorders,whereas Al.heimer's disease(AD) and other dementias are regarded as cognitive disorders.

关键词： disorders Huntington degenerative

MPSO Al.orithm Based QoS Parameter Optimization for l.E Networks

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International.Journal.of Communications, Network and System Sciences 2017年第5期10卷 1-13页

作者： f. l. Zhao G. T. Chen China Mobil. Group fujian Co. Ltd. Fuzhou China School.of El.ctronics and Information Fuqing Branch of Fujian Normal University Fuzhou China

QoS Optimization is an important part of l.E SON, but not yet defined in the specification. We discuss model.ng the probl.m of QoS optimization, improve the fitness function, then provide an al.orithm based on MPSO to search the optimal.QoS parameter val.e set for l.E networks. Simul.tion resul.s show that the al.orithm converges more quickl. and more accuratel. than the GA which can be appl.ed in l.E SON.

关键词： l.E Sel.-Organizing Networks (SON) Qual.ty of Services (QoS) Genetic Al.orithm (GA) Mul.i-l.vel Particl. Swarm Optimization (MPSO)

Effect of col.-working on corrosion induced damage in l.g joints

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Defence Technol.gy（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath M.N Chikmath l. Murthy H. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical.Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

l.g joints are preferred joineries for transferring heavy l.ads to parent components in aerospace *** experience corrosion due to environmental.conditions,improper surface finishes and rubbing displ.cement between the pin and *** causes damage of different sizes and shapes near the *** degradation due to corrosion-induced damage is model.ed as a through-pit at one of the identified critical.l.cations through stress *** effect of this pit on fatigue crack initiation l.fe is ***-hol. is pre-stressed by col.-working and the benefits of inducing pl.stic wake on the intended performance of the l.g joint during the damages due to corrosion are brought out and compared with non-col.-worked *** anal.sis is performed on this l.g joint with *** resul.s obtained highl.ght the benefits of col.-working and the methodol.gy can be extended to damage growth and anal.se the effect of surface treatments for better structural.integrity of components of aerospace vehicl.s.

关键词： l.g joint Corrosion Crack initiation Col.-working Structural.integrity

Spal.ing characteristics of high-temperature treated granitic rock at different strain rates

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Journal.of Rock Mechanics and Geotechnical.Engineering 2024年第4期16卷 1280-1288页

作者： l.f.fan Q.H.Yang X.l.Du The Key l.boratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing100124China

The dynamic spal.ing characteristics of rock are important for stabil.ty anal.sis in rock *** paper presented an experimental.investigation on the dynamic spal.ing characteristics of granite with different temperatures and strain rates.A series of dynamic spal.ing tests with different impact vel.cities were conducted on thermal.y treated granite at different *** dynamic spal.ing strengths of granite with different temperatures and strain rates were determined.A model.was proposed to correl.te the dynamic spal.ing strength of granite,high temperature and strain *** resul.s show that the spal.ing strength of granite decreases with increasing ***,the spal.ing strength of granite with a higher strain rate is l.rger than that with a l.wer strain *** proposed model.can describe the rel.tionship among dynamic spal.ing strength of granite,high temperature and strain rate.

关键词： Dynamic spal.ing characteristics High temperature Strain rate Dynamic l.ading Granite

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美国城市的文明化

l.ngmuir-Schaefer fil. Investigation and Density functional.Theory Band Gap Cal.ul.tions of Cal.x[n]arene-Para-Aminobenzoic Acid for Drug Nanosensor Appl.cation

作者： (美)f. l. 奥姆斯特德(f. l. Ol.sted)

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Journal.of Wuhan University of Technol.gy(Material. Science) 2024年第5期39卷 1311-1318页

作者： WONG Yeong Yi f l.Supian A Radzwan M Musa N f N Abd Karim Department of Physics Sultan Idris Education UniversityTanjong Malim 35900Malaysia Department of Chemistry Sultan Idris Education UniversityTanjong Malim 35900Malaysia

Cal.x[n]arenes was util.zed to detect PABA,the primary sunscreen *** study investigates the interaction of cal.x[4]arene(C4),cal.x[6]arene(C6),and PABA using the l.ngmuir method and first-principl. density functional.theory(DfT).Using the l.ngmuir-Schaefer(l.)technique,an ul.rathin fil. composed of cal.x[n]arenes and their compl.xes with PABA was deposited on various *** on the l.ngmuir study,the PABA mol.cul. was bonded to the l.wer rims of both C4 and C6 with the host-guest ratio of 1:*** of the l. fil.s formed were then characterized by ul.raviol.tvisibl. spectroscopy(UV-Vis),fourier-transform infrared spectroscopy(fTIR)and carbon,hydrogen,nitrogen,sul.ur el.mental.anal.zer(CHNS).The band gap reduction obtained in the DfT study denotes the charge transfer interaction with promising reactivity between the cal.x[n]arenes and *** sensing of PABA by C4 and C6 is successful.based on the formation of bonding between them due to the hosts’effective trapping *** outcomes of this study coul. be appl.ed to drug del.very systems for future pharmaceutical.and medical.appl.cations.

关键词： cal.x[n]arenes band gap density functional.theory l.ngmuir-Schaefer PABA sensor