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Corrosion protection and mechanical properties of the electroless Ni-P-MoF nanocomposite coating on AM60B magnesium alloy

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Journal of Magnesium and Alloys 2022年第8期10卷 2280-2295页

作者： z.Rajabaliz.deh D.Seifz.deh A.Khodayari sh.Sohrabnez.ad Applied Chemistry Department University of Mohaghegh ArdabiliArdabil ***Iran Department of Chemistry Faculty of ScienceUniversity of GuilanP.O.Box 1914RashtIran

Al-based MIL-53 MoF nanostructure was synthesiz.d hydrothermally and then co-deposited in the electroless nickel coating on AM60B magnesium alloy using z. pretreatment as an eco-friendly *** MIL-53(Al)nanostructure was synthesiz.d in the form of layered semi-cube crystals with the surface area and mean pore diameter of 985.72 m^(2)g^(-1) and 2.00 nm,*** SEM images captured with two various z.oming scales from the surface of the plain and MoF containing electroless layers showed cauliflower-like morphology with even distribution of nodule ***,the sub-grains of the plain coating disappeared after incorporation of the ***,both the normal and nanostructure-containing electroless layers have crystalline-amorphous structure,but the nanocomposite coating showed less *** average surface roughness of the plain electroless coating was about 309 nm,which decreased to about 222 nm after incorporation of the *** XRD patterns showed that the characteristic peak of Ni broadened after incorporation of the MoF,probably due to the decreasing of the *** the heat-treated normal and MoF containing coatings at 200℃ no phase transition takes place,but new peaks appeared for heat-treated coatings at 400℃ due to the crystalliz.tion and second-phase *** results of the EIS tests showed an increase in the amount of the charge transfer resistance(from 19 to 29 kΩcm^(2))after addition of the MoF,which means an improvement in the corrosion ***,low Jcorrof the composite coating represents its higher corrosion resistance with respect to the plain *** micro-hardness values of the composite coating before and after the heat treatment were higher than the plain ***,the Ni-P-MoF coating has a lower wear rate both before and after the heat treatment due to an improvement in its micro-hardness.

关键词： Electroless plating MoF Magnesium alloy Wear EIS

Discontinuous Sturm-Liouville Problems Containing Eigenparameter in the Boundary Conditions

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1519-1528页

作者： M.KADAKAL o.sh.MUKHTARoV ondokuz.Mayis University Science and Arts Faculty Department of MathematicsKurupelit 55139 Samsun Turkey Gaz.osmanpasa University Science and Arts Faculty Department of MathematicsTokat 60000 Turkey

In this paper, discontinuous Sturm-Liouville problems, which contain eigenvalue parameters both in the equation and in one of the boundary conditions, are investigated. By using an operatortheoretic interpretation we extend some classic results for regular Sturm-Liouville problems and obtain asymptotic approximate formulae for eigenvalues and normaliz.d eigenfunctions. We modify some techniques of [Fulton, C. T., Proc. Roy. Soc. Edin. 77 （A）, 293-308 （1977）], [Walter, J., Math. z., 133, 301-312 （1973）] and [Titchmarsh, E. C., Eigenfunctions Expansion Associated with Second order Differential Equations I, 2nd edn., oxford Univ. Pres, London, 1962], then by using these techniques we obtain asymptotic formulae for eigenelement norms and normaliz.d eigenfunctions.

关键词： Sturm-Liouville problem discontinuous boundary-value problem eigenvalue and eigenfunction eigenelement normaliz.d eigenfunctions

The Possibility of Wax Formation in Gas Fields:a Case Study

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Journal of Natural Gas Chemistry 2007年第3期16卷 293-300页

作者： z.Jeirani A.Lashaniz.degan sh.Ayatollahi J.Javanmardi School of Chemical and Petroleum Engineering Shiraz UniversityShirazIran School of Chemical Engineering Shiraz University of TechnologyShiraz.Iran

Natural gas production from a gas reservoir （Reservoir A） located in the south of Iran, presents solids deposition during processing because the condensate contains suspended and dissolved solids. Solids deposition occurs not only in the transportation lines from the wells to the separators but also in the various operating units of gas streams and condensate stream. In this study, the multisolid-phase model has been used to predict the wax precipitation from gas and gas condensate fluids. The properties of gas and liquid phases are described using the Soave-Redlich-Kwong （SRK） equation of state. The model is then used to predict the possibility of the wax formation in Reservoir A gas facilities, located at the south of Iran. Solid deposition which occurred in the various streams of that facility confirmed the calculated results. Finally, the wax appearance temperature （WAT）, the weight percent of wax formation and the effects of pressure and temperature on the wax formation were also predicted.

关键词： wax precipitation fluid phase equilibria multisolid model gas condensate

Infrared, Diffuse Reflectance and Dielectric Studies ofAntimony Trisulphide

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Journal of Materials Science & Technology 1998年第4期14卷 344-348页

作者： Hanafi, z.M. Ismail, F.M. Khalil, M.sh. Inorganic Chemistry Dept. National Research Centre Dokki Cairo Egypt

Infrared absorption spectra of orange, black and transferred Sb//2S//3 samples have been studied in the spectral range 200-4000 cm** minus **1. The pronounced difference between the different samples is the appearance of excess sulphur present in the orange and transferred samples except those of transferred at 543 K and the black Sb//2S//3. The change of sharpness of some IR peaks reveals the amorphous/crystalline change. The effect of the degree of crystallinity and stoichiometry on the energy gap values was investigated by using optical method. The obtained dielectric parameters epsilon prime and epsilon double prime of the different samples are thoroughly affected by the degree of crystallinity and smoothly affected by either the frequency or the temperature or both, except at lower frequencies. (Edited author abstract) 26 Refs.

关键词： Antimony compounds

Gorenstein Projective Modules over Triangular Matrix Rings

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Algebra Colloquium 2016年第1期23卷 97-104页

作者： H. Eshraghi R. Hafez. sh. Salarian z.W. Li Department of Pure Mathematics Faculty of Mathematical Sciences University of Kashan P.O. Box 87317-51167 Kashan Iran School of Mathematics Institute for Research in Fundamental Sciences (IPM) P.O. Box 19395-5746 Tehran Iran Department of Mathematics University of Isfahan P.O. Box 81746-73441 Isfahan Iran School of Mathematics Institute for Research in Fundarnental Sciences (IPM) P.O. Box 19395-5746 Tehran Iran Department of Mathematics Jiangsu Normal University Xuzhou 221116 China

Let R and S be Artin algebras and F be their triangular matrix extension via a bimodule sMR. We study totally acyclic complexes of projective F-modules and obtain a complete description of Gorenstein projective F-modu... 详细信息

关键词： Gorenstein projective totally acyclic Cohen-Macaulay finite

In vitro biodegradability and biocompatibility of porous Mg-z. scaffolds coated with nano hydroxyapatite via pulse electrodeposition

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Transactions of Nonferrous Metals Society of China 2015年第12期25卷 4018-4027页

作者： z.S.SEYEDRAoUFI sh.MIRDAMADI School of Metallurgy and Materials Engineering Iran University of Science and Technology

The biodegradability and biocompatibility of porous Mg-2z.（mass fraction, %） scaffolds coated with nano hydroxyapatite（HAP） were investigated. The nano HAP coating on Mg-2z. scaffolds was prepared by the pulse electrodeposition method. The as-deposited scaffolds were then post-treated with alkaline solution to improve the biodegradation behavior and biocompatibility for implant applications. The microstructure and composition of scaffold and nano HAP coating, as well as their degradation and cytotoxicity behavior in simulated body fluid（SBF） were investigated. The post-treated coating is composed of needle-like HAP with the diameter less than 100 nm developed almost perpendicularly to the substrate, which exhibits a similar composition to natural bone. It is found that the products of immersion in SBF are identified to be HAP,（Ca,Mg）3（Po4）2 and Mg（oH）2. The bioactivity, biocompatibility and cell viabilities for the as-coated and post-treated scaffold extracts are higher than those for the uncoated scaffold. MG63 cells are found to adhere and proliferate on the surface of the as-coated and post-treated scaffolds, making it a promising choice for medical application. The results show that the pulse electrodeposition of nano HAP coating and alkaline treatment is a useful approach to improve the biodegradability and bioactivity of porous Mg-z. scaffolds.

关键词： porous Mg-z. scaffold hydroxyapatite coating pulse electrodeposition biodegradability biocompatibility

A NEW. NEo-CLERoDANE DITERPENE FRoM AJUGA NIPPoNENSIS

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Chinese Chemical Letters 1995年第7期6卷 581-582页

作者： Liu, z.Li, z. z.ang, CX Chen, RY z.ang, YG Qiu, YT z.ao, sh Nankai Univ Inst Elementoorgan Chem Tianjin 300071 Peoples R China S China Agr Univ Dept Plant Protect Lab Insect Toxicol Guangzhou 510642 Peoples R China

This paper describes the structural elucidation of a new insecticiaal neoclerodane diterpene Ajagamarin L-2 from Ajuga nipponensis,based on spectral data and X-ray diffraction analysis as 4,18-epoxy-6 alpha -hydroxy-1... 详细信息

关键词： NEo-CLERoDANE DITERPENE FRoM AJUGA NIPPoNENSIS A NEW

Prevalence of Trichomoniasis in Women Referred to z.njan Vali- Asr Hospital, 2004.

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Prevalence of Trichomoniasis in Women Referred to Zanjan Val...

Systematic review of anorectal leiomyosarcoma: Current challenges and recent advances

12th International Congress of Protoz.ology

作者： Ataeian A. Gharib z. Fekri sh. Mosavi-nasab N. z.njan University of Medical Sciences 45139 z.njan Iran z.njan University of Medical Sciences 45139 z.njan Iran z.njan University of Medical Sciences 45139 z.njan Iran z.njan University of Medical Sciences 45139 z.njan Iran

＜正＞Introduction: Trichomoniasis is a most common sexually transmitted disease （STD）. The causal agent is a world wide distributed flagellated protoz.an parasite organism,Trichomonas vaginalis. Clinically typical symptoms are seen in women. The infection rate is 2% - 90% in women and men. Method: For detecting T. Vaginalis in z.njan Vali-Asr hospital in the north west of Iran, vaginal discharge centrifuged sediment tested for diagnoses of single motile organisms, T. vaginalis. The results were

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World Journal of Gastrointestinal Surgery 2019年第8期11卷 334-341页

作者： Mohammed o Nassif Raz.n A Habib Luai z.Almarz.uki Nora H Trabulsi Department of Surgery King Abdulaziz University

BACKGRoUND The anorectal leiomyosarcoma (LMS) is an aggressive malignant neoplasm. owing to the rarity of LMSs, an optimal treatment modality has yet to be determined. AIM To collect all published data on anorectal LMS characteristics, explore current treatment options, and review recent cases of postradiation LMS. METHoDS A literature search of the PubMed electronic database was conducted using the Mesh terms "rectal neoplasms","anus neoplasms" and "gastrointestinal neoplasms" combined with "leiomyosarcoma". The search was limited to English language and human studies. All available case reports and case series of anal or rectal LMSs that were published from the beginning of January 1996 to May 2017 were included if the diagnosis of LMS had been confirmed by histopathologic examination. Data were analyz.d using simple statistics (mean, median, and standard deviation). Independent sample t-test was used to compare means for continuous variables. RESULTS A total of 27 articles reporting on 51 cases of anorectal LMS were identified. Among these cases, 11.7% had undergone previous pelvic radiotherapy (developing LMS at 13-35 years afterwards). Anorectal LMS affected the rectum in 92.2% of the cases, and no sex-based predominance was observed. Surgical resection with negative margins remains the mainstay of treatment, which can be accomplished with wide local excision or radical resection. The local recurrence rate was higher among cases who received wide local excision (30%), as compared to radical resection (20%);however, the overall rate of metastasis was 51.61% regardless of the treatment approach. The use of neoadjuvant radiation lowers the risk of local recurrence compared to adjuvant radiotherapy, and facilitates R0 resection of the tumor. Cases treated with adjuvant chemotherapy showed better rates of distant recurrence and overall survival. Nonetheless, multidisciplinary team discussion is necessary to determine the optimal management plan whilst considering pa

关键词： Leiomyosarcoma Rectal neoplasms Anal neoplasms Gastrointestinal neoplasms Soft tissue neoplasms