scholarly journals Experimental Study on Preparation of Ferropericlase by Oxalate Coprecipitation

Minerals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 179
Author(s):  
Yanjun Xiao ◽  
Tong Sun ◽  
Yong-Hong Zhao
Keyword(s):  
Liquid Phase ◽  
Solid Phase ◽  
Synthesis Method ◽  
Conventional Technique ◽  
Molar Ratio ◽  
Phase Method ◽  
Mixed Solution ◽  
Phase Synthesis ◽  
Final Sample ◽  
Solid Phase Method

It is always a goal of scientists to develop new techniques to identify the composition of mantle materials and understand geodynamic processes accurately. Ferropericlase (Mg,Fe)O is a prominent mineral in the lower mantel. It is a common practice in the research community to prepare ferropericlase using a solid-phase synthesis method or high-pressure experiment synthesis method. This conventional method contains a number of ambiguities a great deal of time is needed. In this paper, we have addressed the drawbacks of the conventional technique using a liquid-phase synthesis method to prepare ferropericlase. During the experiment, oxalic acid was added to a mixed solution of ferrous sulfate and magnesium chloride and mixed according to the molar ratio. The formed magnesium iron oxalate precipitate was sintered and reduced into the final sample. Furthermore, the final sample was analyzed using XRD and SEM. Compared to the solid-phase method, this coprecipitation method could produce ferropericlase with a shorter sintering time, lower sintering temperature, and a reduction in the amount of gas consumed. XRD and SEM results show that the liquid-phase method produced samples with better composition homogeneity.

Synthesis of Tetrapeptides and Screening of their Antioxidant Properties

2020 ◽  
Vol 15 (6) ◽  
pp. 680-685
Author(s):  
Rani Maharani ◽  
Dadan Sumiarsa ◽  
Achmad Zainuddin ◽  
Nuruzzahra Ammatillah ◽  
Ace T. Hidayat ◽  
...  
Keyword(s):  
Solid Phase ◽  
Antioxidant Activities ◽  
Solid Phase Peptide Synthesis ◽  
Antioxidant Properties ◽  
Synthesis Method ◽  
Phase Method ◽  
Coupling Reactions ◽  
Phase Synthesis ◽  
Solid Phase Method ◽  
Sturgeon Fish

Background: Tetrapeptide Pro-Ala-Gly-Tyr (PAGY) is an antioxidant peptide that was isolated by Nikoo et al. (2014) from hydrolysate of skin gelatin of amur sturgeon fish (Acipenser schrenckii). This research aims to synthesize PAGY and its analogues by a solid-phase method, and to screen their antioxidant activities. Methods: PAGY and its analogues, namely, Pro-Ser-Gly-Tyr (PSGY), Pro-Ala-Phe-Tyr (PAFY), Pro- Phe-Phe-Tyr (PFFY) and Pro-Ala-Ile-Tyr (PAIY), were synthesized via a solid phase peptide synthesis method with the Fmoc/t-Bu strategy. The synthesis was undertaken on 2-chlorotritylchloride resin as solid support, and all coupling reactions were facilitated by a combination of HBTU and HOBt reagents. All peptides were cleaved from the resin by using 95% TFA in water. Results: Through the solid-phase synthesis method, all peptides were obtained in 50-85% yields. Pure peptides were analysed by analytical RP-HPLC, and were characterized by HR-TOF-ESI-MS and 1HNMR. DPPH inhibition assay was applied to all of the peptides with IC50 of 1.750; 1.116; 1.177 ;1.437; and 1.642 mg/mL for PAGY, PSGY, PAFY, PFFY, and PAIY, respectively. Conclusion: PAGY and its four analogs were successfully synthesized by solid-phase method. PSGY compound was found to have the highest activity of all in DPPH assay.

Lignin-assisted solid-phase synthesis of nano-CuO for a photocatalyst with excellent catalytic activity and high performance supercapacitor electrodes

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65644-65653 ◽  
Author(s):  
Xiaohong Wang ◽  
Fangsheng Wu ◽  
Yawei Duan ◽  
Yingying Wang ◽  
Chen Hao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Performance ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Phase Method ◽  
Phase Synthesis ◽  
Solid Phase Method

CuO nanostructures were successfully synthesized using NaOH and Cu(NO3)2 as starting materials by an aminated lignin (AL)-assisted solid-phase method.

Solid-phase synthesis of peptide selenoesters via a side-chain anchoring strategy

2017 ◽  
Vol 53 (39) ◽  
pp. 5424-5427 ◽  
Author(s):  
Cameron C. Hanna ◽  
Sameer S. Kulkarni ◽  
Emma E. Watson ◽  
Bhavesh Premdjee ◽  
Richard J. Payne
Keyword(s):  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Side Chain ◽  
Phase Method ◽  
Phase Synthesis ◽  
Solid Phase Method

A robust, high yielding and epimerisation-free solid-phase method for accessing peptide selenoesters is reported.

scholarly journals Synthesis of Perovskite by Solid-Phase Method with Metatitanic Acid and Calcium Carbonate and Its Pigment Properties Investigation

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1508
Author(s):  
Han Zhang ◽  
Sijia Sun ◽  
Wei Liu ◽  
Hao Ding ◽  
Jianmeng Zhang
Keyword(s):  
Calcium Carbonate ◽  
Solid Phase ◽  
Perovskite Phase ◽  
Contrast Ratio ◽  
National Standard ◽  
Molar Ratio ◽  
Phase Method ◽  
Coating Film ◽  
Metatitanic Acid ◽  
Solid Phase Method

Synthetic perovskite powder (SPP) was synthesized by the solid-phase method using metatitanic acid (TiO2·nH2O) and calcium carbonate (CaCO3) as raw materials, and its structure, morphology, pigment properties and application in architectural coatings were studied. When TiO2·nH2O and CaCO3 were mixed and ground at a molar ratio of TiO2:CaO = 1:1, and then calcined at 900–1100 °C, SPP with a single perovskite phase was obtained. The characterization results displayed that the unit particle size of SPP was 50–150 nm, the aggregate size was 1–2 μm, and its particles were well dispersed. The SPP also had a whiteness of 90.5%, and an oil absorption of 35.03 g/100 g. The hiding power of SPP was 24.02 g/m2, which was 81.6% of pure TiO2 hiding power (19.60 g/m2). When adding SPP to prepare a building exterior wall coating, the contrast ratio of the coating film was 0.92, which met the requirements of the Chinese national standard GB/T 9755-2014 and was equivalent to adding rutile titanium dioxide. Thus, perovskite synthesized from TiO2·nH2O and CaCO3 by the solid-phase method significantly improved the pigment properties of TiO2 in the same proportion.

scholarly journals Solid-phase synthesis of ytterbium zirconate using mechanical activation

2021 ◽  
Vol 12 (2-2021) ◽  
pp. 154-158
Author(s):  
O. A Kuzmenkov ◽  
◽  
A. M. Kalinkin ◽  
Keyword(s):  
Mechanical Activation ◽  
Solid Phase ◽  
Planetary Mill ◽  
Phase Method ◽  
Stoichiometric Mixture ◽  
Phase Synthesis ◽  
X Ray ◽  
Zirconium Oxides ◽  
Solid Phase Method ◽  
Complex Thermal Analysis

Nanocrystalline ytterbium zirconate Yb4Zr3O12 was prepared by the solid-phase method using mechanical activation of stoichiometric mixture of zirconium and ytterbium oxides. Mechanical activation was carried out in an AGO-2 centrifugal-planetary mill at a centrifugal factor of 40 g for 10 min. The processes occurring during the calcination of the mechanically activated mixture of ytterbium and zirconium oxides in the range from 600 to 1300 °C were investigated using X-ray phase analysis, IR spectroscopy, and complex thermal analysis.

Synthesis of Bi2O3- B2O3- SiO2- ZnO Glass and their Effects on the Sintering Temperature and Magnetoelectric Properties of Co / Ti Doped M-Type Barium Ferrite

2011 ◽  
Vol 687 ◽  
pp. 189-193 ◽  
Author(s):  
Wen Guo Zhong ◽  
Ying Li Liu ◽  
Yuan Xun Li ◽  
Da Ming Chen ◽  
Kai Yang
Keyword(s):  
Electron Microscopy ◽  
Barium Ferrite ◽  
Sintering Temperature ◽  
Solid Phase ◽  
Molar Ratio ◽  
Phase Method ◽  
Sintering Behavior ◽  
Magnetoelectric Properties ◽  
Solid Phase Method ◽  
Scanning Electron

The 25%Bi2O3-30%B2O3-10%SiO2-35%ZnO (molar ratio, abbreviated as BBSZ) glass were successfully prepared by solid-phase method. The amount of BBSZ glass varied from 1wt% to 5 wt% was optimized and its effects on the sintering behavior, structure and magnetoelectric properties of the Co / Ti doped M-type barium ferrite were investigated by HP 4291B vector analysis, scanning electron microscopy (SEM) and VSM magnetometer respectively. The testing results show that the ferrite could be well sintered at 900°C with excellent performances when the 3wt% BBSZ is added. The initiative permeability and cut-off frequency are 13.5 and 800MHz, respectiveley, which suggests that this material is a candidate for application in the fabrication of chip inductors by the technology of low temperature cofired ceramics and ferrites (LTCC).

scholarly journals Facile Synthesis of Mn0.68Bi0.32OCl Mix-Crystals And Its Supercapacitive Behavior

2021 ◽  
Author(s):  
Y.Z. Song ◽  
B.X. Qi ◽  
M.T. Li ◽  
J.M. Xie
Keyword(s):  
Surface Area ◽  
Solid Phase ◽  
Life Time ◽  
Molar Ratio ◽  
Phase Method ◽  
X Ray Diffraction ◽  
Facile Synthesis ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Solid Phase Method

Abstract Mn0.68Bi0.32OCl mix-crystals for supercapacitor were successfully synthesized via a facile solid-phase method using Bi(NO3)3 and MnCl2 with molar ratio of 1:1 as precursors. The Mn0.68Bi0.32OCl mix-crystals were characterized by scanning electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller surface area measurements and thermogravimetry and differential scanning calorimetry, respectively. Cyclic voltammetry and galvanostatic charge/discharge technique were performed for the Mn0.68Bi0.32OCl mix-crystals in 1 M Na2SO4 aqueous solutions; the specific capacitance of Mn0.68Bi0.32OCl was about 203 F.g-1 at the current density of 3 A. g-1 with a long life time, owing to the high power density of Mn0.68Bi0.32OCl mix-crystals and the higher surface area, good conductivity, and high stability of the Mn0.68Bi0.32OCl mix-crystals.

Solid Phase Synthesis and Optical Properties of CdTiO3 Submicron Particles from Cd(OH)2 and P25 TiO2

2015 ◽  
Vol 713-715 ◽  
pp. 2868-2871 ◽  
Author(s):  
Jing Li ◽  
Xin Wang ◽  
Yan Chen ◽  
Wen Chang Zhuang
Keyword(s):  
Optical Properties ◽  
Solid Phase ◽  
Cost Effective ◽  
Submicron Particles ◽  
Phase Method ◽  
X Ray Diffraction ◽  
Phase Synthesis ◽  
Transmission Electron ◽  
Composition And Structure ◽  
Solid Phase Method

A simple and cost-effective low temperature (600 oC) solid phase method was proposed for the synthesis of CdTiO3 submicron particles, using Cd (OH)2 and P25 TiO2 as the starting materials. The composition and structure of the as-synthesized CdTiO3 submicron particles were characterized by X-ray diffraction and transmission electron microscopy. Besides, the optical properties of the as-synthesized CdTiO3 submicron particles were characterized by UV-vis diffuse reflection spectrum and photoluminescence spectrum.

Solid-phase synthesis of N-(buta-2,3-dien-1-yl)amides by the Crabbé reaction

2013 ◽  
Vol 91 (1) ◽  
pp. 38-42
Author(s):  
Tuomo Leikoski ◽  
Pauli Wrigstedt ◽  
Jorma Matikainen ◽  
Jussi Sipilä ◽  
Jari Yli-Kauhaluoma
Keyword(s):  
Trifluoroacetic Acid ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Phase Method ◽  
Protecting Group ◽  
Product Diversity ◽  
Phase Synthesis ◽  
Solid Phase Method ◽  
Merrifield Resin ◽  
Polymer Supported

The Crabbé homologation of polymer-supported propargylamine with paraformaldehyde, CuI, and dicyclohexylamine in 1,4-dioxane at 100 °C, followed by cleavage with dilute trifluoroacetic acid, furnishes N-(buta-2,3-dien-1-yl)amides as isolable products. The N-acyltriazene linker on Merrifield resin serves simultaneously as a protecting group for the nucleophilic primary amine. The product diversity is achieved by altering the acyl chloride in the acylation of the triazene linker. In addition to being a new route to nitrogen-containing allenes, our solid-phase method enables immobilization of these reactive cumulated dienes for further synthetic operations.

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