A review: Influence of divalent,trivalent, rare earth and additives ions on Ni–Cu–Zn ferrites

From several decades, researchers were fabricated the materials like ferrites, perovskites, ceramic, metal oxides, chalcogenides, etc. and investigated its properties for numerous useful applications. Among all the materials, ferrites are more useful in technological and industrial application purpose. In modern era of technology, ferrites in the form of a nano scales are be the soul of electronic and electrical components. Due to the noticeable versatile properties like high resistivity, moderate permeability, low dielectric loss and moderate sensitivity researcher's shifts their theoretical and technological point of view from other materials to ferrites. The scientists from chemistry, physics, material science and metallurgy are trying to achieve the desirable electric, magnetic, optical and sensing properties of nanoferrites by optimizing its parameters like chemical composition, synthesis methods, addition of impurity, sintering conditions etc. In this review we investigated an influence of substitution or doping of divalent (Ni²⁺, Cu²⁺, Zn²⁺, Mn²⁺, Mg²⁺ etc.), trivalent (Cr³⁺, Al³⁺, In³⁺, WO³⁺ etc.), rare earth (La³⁺, Sm³⁺, Y³⁺, Nd³⁺, Dy³⁺, Tb³⁺, Tm³⁺ etc.) metal ions and addition of additive (MnO₂, SiO₂, TiO₂, BaTiO₃, PbO, V₂O₅ etc.) in Ni–Cu–Zn ferrites. Researchers successfully transforms the Ni–Cu–Zn properties in a way that, industrialists utilized it for various applicative products such as in Li-Ion battery, super capacitors, EM filters, magnetic recording media, micro-inductors, biofuel production, gas sensors, humidity sensors etc. In nutshell, review is a complete combination of preparation methods, impact of divalent, trivalent, rare earth and additives on Ni–Cu–Zn nanoferrite with its useful applications.     

Thermodynamic and exergoeconomic analyses and performance assessment of a new configuration of a combined cooling and power generation system based on ORC–VCR

Journal of Thermal Analysis and Calorimetry - Waste heat recovery systems are proposed to be an environmentally benign and a cost-effective application for efficiency improvement of energy...     

Effects of thermal barrier coating on the performance,combustion and emission of DI diesel engine powered by biofuel oil–water emulsion

Journal of Thermal Analysis and Calorimetry - Owing to the fast depletion of fossil fuels and their skyrocketing price due to the tremendous demand, they become imperative to find renewable...     

Instant Controlled Pressure Drop technology: From a new fundamental approach of instantaneous transitory thermodynamics to large industrial applications on high performance–high controlled quality unit operations

Solvent extraction processes have been largely used in various industries. They recently were improved through new physical concepts such as CO₂ Supercritical Fluid Extraction, Ultrasound assisted process, Microwave-assisted extraction, Instant Controlled Pressure Drop DIC-assisted extraction… Systematically, a pretreatment stage of grinding takes place in order to improve the exchange surface increasing the starting accessibility. Swelling of the material structure implies an increase of the porosity thus leading to higher solvent diffusivity within the solid matrix. A new concept of expanded granule powder has recently been defined using Instant Controlled Pressure Drop DIC technology. Whatever the type of solvent is (even CO₂-SFE), such a swelled structure dramatically intensifies the kinetics through a higher specific exchange surface thanks to the open pores, while improving the solution solvent–solute diffusivity within the solid. Coupled to ultrasound, the internal transfer of solute within the pore solvent can likewise be intensified by replacing molecular diffusion within the pores by an effective convection transfer. In this work, we carried out a first approach of modeling of solvent extraction kinetics of expanded granules involving higher exchange surface and greater internal diffusion process.     

Optimized production,quality control and biodistribution assessment of <Superscript>166</Superscript>Ho–DOTATOC: a novel radiolabelled somatostatin analog

Nowadays, peptide receptor radionuclide therapy is used to treat a specific type of cancer called neuroendocrine tumors. In this research, the optimized conditions for ¹⁶⁶Ho-DOTATOC production are presented. The radiolabeled compound was prepared with the specific activity of 11.1 TBq/mmol and radiochemical purity of more than 99% (using ITLC and HPLC). Stability tests of the complex were investigated in room temperature and in human serum at 37 °C. Biodistribution studies in Syrian rats showed considerable accumulation in pancreas as the somatostatin receptor-positive tissue. ¹⁶⁶Ho-DOTATOC can be considered as a novel agent for treatment of somatostatin receptor-positive tumors.     

Catalytic performance of a Ni catalyst supported on CeO2, ZrO2 and CeO2–ZrO2 in the upgrading of cellulose fast pyrolysis vapors

This work was devoted to the investigation of the catalytic performance of a Ni catalyst supported on CeO₂, ZrO₂ and CeO₂–ZrO₂ in the upgrading of cellulose fast-pyrolysis vapors. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and temperature-programmed reduction (TPR) were used for the surface characterization of the prepared materials. The activity of the catalysts was evaluated by analytical pyrolysis gas chromatography/mass spectrometry (Py-GC/MS). It was demonstrated that the use of 20%Ni/15%CeO₂–ZrO₂ allowed one to obtain the highest olefin and paraffin contents, while owing to the application of 20%Ni/ZrO₂ catalyst the largest amount of aromatics was produced and a considerable decrease in the amount of carboxylic acid fraction was noticed.     

The impact of indium metal as a minor bimetal on the anodic dissolution and passivation performance of zinc for alkaline batteries. Part II: galvanostatic,impedance spectroscopy,and charge–discharge evaluations

Journal of Solid State Electrochemistry - The anodic dissolution and passivation processes of zinc and zinc-indium alloys were investigated in an alkaline solution of 6&nbsp;M KOH using...     

Synthesis of new dihybrid nanofluid of TiO2/MWCNT in water–ethylene glycol to improve mixture thermal performance: preparation,characterization, and a novel correlation via ANN based on orthogonal distance regression algorithm

Journal of Thermal Analysis and Calorimetry - Nanofluid refers to the mixture of fluid and solid nanoparticles. If this mixture contains more than one NP or fluid, it is called “hybrid...     

An emerging strategy for tracing the anti-erectile dysfunction components of raw and salt-processed semens of Astragali Complanati by combinatory liquid chromatography–mass spectrometry-based quantitative analysis,efficacy assessment on impotent rats,and partial least squares regression

Semens of Astragali Complanati own anti-erectile dysfunction effect; however, the components which contribute to the anti-erectile dysfunction effect remain unclear. This work raised a strategy that integrates liquid chromatography coupled mass spectrometry-based quantitative analysis, anti-erectile dysfunction assessment on impotent rats, and their relationship analysis for pinpointing anti-erectile dysfunction components from semens of Astragali Complanati. For simultaneous quantification of seven major components in raw and salt-processed semens of Astragali Complanati, an accurate and reliable liquid chromatography–mass spectrometry method was developed under multiple reaction monitoring mode. Of note, chloramphenicol was employed as the internal standard. The method showed good linearity and repeatability, where the recovery rates of each component ranged from 98.1 to 104.7%, and the precisions of intra- and interday were all within 3.4%. The method has been used for quantification of the seven major components in 10 batches of raw and salt-processed semens of Astragali Complanati. Then, the anti-erectile dysfunction effects of raw and salt-processed semens of Astragali Complanati were evaluated on impotent rats. Gray relationship analysis and partial least squares regression were combined for elucidating the relationship. As a result, complanatuside, astragalin, complanatoside B, and kaempferol were found to be responsible for anti-erectile dysfunction effect of Astragali Complanati.     

Influence of Ce0.8R0.2O2–a (R = Y,Sm, Tb) submicron barrier layers at the La2NiO4+δ/YSZ boundary on the electrochemical performance of a cathode

Journal of Solid State Electrochemistry - Ce0.8R0.2O2–a (R = Y, Sm, Tb) (further Се20R) submicron barrier layers, which were obtained by the dip-coating method on a YSZ (ZrO2 +...     

A review of: “The Effects of Hostile Environments on Coattings and Plastics,Acs. D. P. Garner and G. A. Stahl (Editors): Symposium Series 229, American Chemical Society,Washington, D.C., 1983, 339 pp., U.S. and Canada $47.95, export $57.95.”

Rh‐catalyzed polymerization of a new N‐propargylamide monomer having a galactose residue was investigated. The polymerization proceeded in a mixed solvent of THF and water to produce the galactose‐carrying poly(N‐propargylamide) consisting of cis‐isomer. The copolymerization of the monomer with the N‐propargylamide having the alkyl chain was also carried out.     

Comments on: “Toward improved heat transfer performance of annular heat exchangers with water/ethylene glycol based nanofluids containing graphene nanoplatelets,Journal of Thermal Analysis and Calorimetry 126.3 (2016): 1427–1436”

The present study has investigated the complex mechanisms in the aluminum–titanium system with different percentages of titanium through a combination of thermal and X-ray analyses. Thermogravimetry, derivative thermogravimetric, X-ray diffraction, scanning electron microscope and transition electron microscope were used for characterization of the samples. Initially, different Al–Ti powder mixtures were produced by high-energy ball milling and after 30 h of milling the phases generated at different percentages of Ti were analyzed. The XRD results revealed that the intermetallic Al₃Ti powder is obtained after a certain duration of milling. In addition, L1₂ to D0₂₃ phase transformation is possible with increase of the Ti percent. Analyses of the powder annealed at different temperatures yielded interesting results, including the effect of stearic acid as the surface control agent on phase transformations of the aluminum–titanium system and also the formation of unexpected phases such as Al₄C₃ and TiC. Moreover, ductile to brittle transition during phase transformations of the intermetallic Al₃Ti powder was quite conspicuous, which could result in more homogeneity of the powders and the occurrence of more reactions in the system. For example, formation of D0₂₃-Al₃Ti powder which is more brittle compared to L1₂ resulted in the exit of Al from among its layers, leading to the increase of the chances for Al reaction with the system impurities.