Syntheses and characterization of two new coordination compounds containing an azide ligand in the presence of o-donor co-ligands with nickel and copper(II) metal ions and an investigation into the effects of sonochemical methods on morphology and particle size

The coordination behavior of the antiulcer drug cimetidine (cime) towards transition metal ions was investigated. The synthesis and characterization of [Cr(cime)2Cl2]Cl·3H2O, [Co(cime)Cl2]·5H2O, [Co(cime)3Cl]Cl·3H2O, [Ni(cime)Cl2(H2O)2]·H2O, [Cu(cime)Cl2]·2H2O, [Cu(cime)2Cl(H2O)]Cl·H2O, [Cu(cime)3Cl2]·3H2O, [Cu2(cime)Cl4], and [Zn(cime)Cl2]·1.5H2O are discussed, where cime acts as monodentate (imidazole N3) or bidentate ligand (N3 and S8). IR, UV-vis, EPR and NMR spectroscopies, mass spectrometry (FAB+), were employed for the characterization. In order to identify the most reactive areas of cimetidine, the electrostatic potential map of the ligand was calculated; also the structures of minimum energy of the coordination compounds were modeled using DFT (B3LYP/def2-TZVP) calculations.

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Incorporation of micro/nanoparticles of PCL with essential oil of Cymbopogon nardus in bacterial cellulose

International Journal of Advances in Medical Biotechnology - IJAMB ◽

10.25061/2595-3931/ijamb/2018.v1i2.18 ◽

2018 ◽

Vol 1 (2) ◽

pp. 37

Author(s):

Aline Krindges ◽

Vanusca Dalosto Jahno ◽

Fernando Morisso

Keyword(s):

Particle Size ◽

Particulate Matter ◽

Essential Oil ◽

Zeta Potential ◽

Bacterial Cellulose ◽

Culture Medium ◽

Static Culture ◽

Cymbopogon Nardus ◽

Cellulose Membranes

Incorporation studies of particles in different substrates with herbal assets growing. The objective of this work was the preparation and characterization of micro/nanoparticles containing cymbopogon nardus essential oil; and the incorporation of them on bacterial cellulose. For the development of the membranes was used the static culture medium and for the preparation of micro/nanoparticles was used the nanoprecipitation methodology. The incorporation of micro/nanoparticles was performed on samples of bacterial cellulose in wet and dry form. For the characterization of micro/nanoparticles were carried out analysis of SEM, zeta potential and particle size. For the verification of the incorporation of particulate matter in cellulose, analyses were conducted of SEM and FTIR. The results showed that it is possible the production and incorporation of micro/nanoparticles containing essential oil in bacterial cellulose membranes in wet form with ethanol.

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Coordination Compounds of Some 3d-Transition Metal Ions with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)- thiosemicarbazide

Revista de Chimie ◽

10.37358/rc.08.7.1882 ◽

2008 ◽

Vol 59 (7) ◽

Author(s):

Madalina Angelusiu ◽

Maria Negoiu ◽

Stefania-Felicia Barbuceanu ◽

Tudor Rosu

Keyword(s):

Coordination Compounds ◽

Magnetic Moments ◽

Thermo Gravimetric Analysis ◽

Electronic Spectroscopy ◽

Transition Metal Ions ◽

Synthesis And Characterization ◽

Gravimetric Analysis ◽

Thermo Gravimetric ◽

New Compounds

The paper presents the synthesis and characterization of Cu(II), Co(II), Ni(II), Cd(II), Zn(II) and Hg(II) complexes with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)-thiosemicarbazide. The new compounds were characterized by IR, EPR, electronic spectroscopy, magnetic moments, thermo-gravimetric analysis and elemental analysis.

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Structural Characterization of Soil Organic Matter and Humic Acids in Particle-Size Fractions of an Agricultural Soil

Soil Science Society of America Journal ◽

10.2136/sssaj2002.0129 ◽

2002 ◽

Vol 66 (1) ◽

pp. 129 ◽

Cited By ~ 51

Author(s):

Benny Chefetz ◽

Jorge Tarchitzky ◽

Ashish P. Deshmukh ◽

Patrick G. Hatcher ◽

Yona Chen

Keyword(s):

Particle Size ◽

Organic Matter ◽

Soil Organic Matter ◽

Humic Acids ◽

Structural Characterization ◽

Agricultural Soil ◽

Size Fractions ◽

Particle Size Fractions

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CHARACTERIZATION OF COMPOST GRADES ORIGINATED BY DRY FRACTIONATION FOR VARIOUS PARTICLE SIZE OF COMPOST PRODUCED BY SOME AGRICULTURE RESIDUES

Menoufia Journal of Soil Science ◽

10.21608/mjss.2018.123304 ◽

2018 ◽

Vol 3 (1) ◽

pp. 37-51

Author(s):

Y.A.El- Tahlawy ◽

Soad Y. El- Sayed ◽

Hend M. El- Egemey

Keyword(s):

Particle Size ◽

Dry Fractionation ◽

Agriculture Residues

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Isolasi Dan Karakterisasi Bentonit Alam Menjadi Nanopartikel Monmorillonit

Jurnal Katalisator ◽

10.22216/jk.v3i1.2729 ◽

2018 ◽

Vol 3 (1) ◽

pp. 12 ◽

Cited By ~ 1

Author(s):

Zaimahwati Zaimahwati ◽

Yuniati Yuniati ◽

Ramzi Jalal ◽

Syahman Zhafiri ◽

Yuli Yetri

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Particle Size ◽

Surface Morphology ◽

Average Diameter ◽

Particle Size Analyzer ◽

Ft Ir ◽

Scanning Electron ◽

Sedimentation Processes

Pada penelitian ini telah dilakukan isolasi dan karakterisasi bentonit alam menjadi nanopartikel montmorillonit. Bentonit alam yang digunakan diambil dari desa Blangdalam, Kecamatan Nisam Kabupaten Aceh Utara. Proses isolasi meliputi proses pelarutan dengan aquades, ultrasonic dan proses sedimentasi. Untuk mengetahui karakterisasi montmorillonit dilakukan uji FT-IR, X-RD dan uji morfologi permukaan dengan Scanning Electron Microscopy (SEM). Partikel size analyzer untuk menganalisis dan menentukan ukuran nanopartikel dari isolasi bentonit alam. Dari hasil penelitian didapat ukuran nanopartikel montmorillonit hasil isolasi dari bentonit alam diperoleh berdiameter rata-rata 82,15 nm.In this research we have isolated and characterized natural bentonite into montmorillonite nanoparticles. Natural bentonite used was taken from Blangdalam village, Nisam sub-district, North Aceh district. The isolation process includes dissolving process with aquades, ultrasonic and sedimentation processes. The characterization of montmorillonite, FT-IR, X-RD and surface morphology test by Scanning Electron Microscopy (SEM). Particle size analyzer to analyze and determine the size of nanoparticles from natural bentonite insulation. From the research results obtained the size of montmorillonite nanoparticles isolated from natural bentonite obtained an average diameter of 82.15 nm.

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Characterization of Steel Slag Filler and Its Effect on Aging Resistance of Asphalt Mastic with Various Aging Methods

Materials ◽

10.3390/ma14040869 ◽

2021 ◽

Vol 14 (4) ◽

pp. 869

Author(s):

Minghua Wei ◽

Shaopeng Wu ◽

Haiqin Xu ◽

Hechuan Li ◽

Chao Yang

Keyword(s):

Particle Size ◽

Surface Characterization ◽

Steel Slag ◽

Self Healing ◽

Limestone Filler ◽

Asphalt Mastic ◽

Pore Characterization ◽

Asphalt Mastics ◽

Healing Property

Steel slag is the by-product of the steelmaking industry, the negative influences of which prompt more investigation into the recycling methods of steel slag. The purpose of this study is to characterize steel slag filler and study its feasibility of replacing limestone filler in asphalt concrete by evaluating the resistance of asphalt mastic under various aging methods. Firstly, steel slag filler, limestone filler, virgin asphalt, steel slag filler asphalt mastic and limestone filler asphalt mastic were prepared. Subsequently, particle size distribution, surface characterization and pore characterization of the fillers were evaluated. Finally, rheological property, self-healing property and chemical functional groups of the asphalt mastics with various aging methods were tested via dynamic shear rheometer and Fourier transform infrared spectrometer. The results show that there are similar particle size distributions, however, different surface characterization and pore characterization in the fillers. The analysis to asphalt mastics demonstrates how the addition of steel slag filler contributes to the resistance of asphalt mastic under the environment of acid and alkaline but is harmful under UV radiation especially. In addition, the pore structure in steel slag filler should be a potential explanation for the changing resistance of the asphalt mastics. In conclusion, steel slag filler is suggested to replace limestone filler under the environment of acid and alkaline, and environmental factor should be taken into consideration when steel slag filler is applied to replace natural fillers in asphalt mastic.

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Characterization of the binding affinity between some anti-Parkinson agents and Mn2+, Fe3+ and Zn2+ metal ions: A DFT insight

Inorganic Chemistry Communications ◽

10.1016/j.inoche.2021.108582 ◽

2021 ◽

pp. 108582

Author(s):

Sadegh Kaviani ◽

Siyamak Shahab ◽

Masoome Sheikhi ◽

Mehrnoosh Khaleghian ◽

Sultan Al Saud

Keyword(s):

Metal Ions ◽

Binding Affinity

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Purification and characterization of fat body lipase from the greater wax moth, Galleria mellonella (Lepidoptera: Pyralidae)

The Journal of Basic and Applied Zoology ◽

10.1186/s41936-019-0134-y ◽

2019 ◽

Vol 81 (1) ◽

Cited By ~ 1

Author(s):

Rahma R. Z. Mahdy ◽

Shaimaa A. Mo’men ◽

Marah M. Abd El-Bar ◽

Emad M. S. Barakat

Keyword(s):

Metal Ions ◽

Kinetic Parameters ◽

Biochemical Characterization ◽

Galleria Mellonella ◽

Fat Body ◽

Specific Activity ◽

Larval Instar ◽

Gel Filtration ◽

Molecular Weights

Abstract Background Insect lipid mobilization and transport are currently under research, especially lipases and lipophorin because of their roles in the production of energy and lipid transport at a flying activity. The present study has been conducted to purify intracellular fat body lipase for the first time, from the last larval instar of Galleria mellonella. Results Purification methods by combination of ammonium sulfate [(NH4)2SO4] precipitation and gel filtration using Sephadex G-100 demonstrated that the amount of protein and the specific activity of fat body lipase were 0.008633 ± 0.000551 mg/ml and 1.5754 ± 0.1042 μmol/min/mg protein, respectively, with a 98.9 fold purity and recovery of 50.81%. Hence, the sephadex G-100 step was more effective in the purification process. SDS-PAGE and zymogram revealed that fat body lipase showed two monomers with molecular weights of 178.8 and 62.6 kDa. Furthermore, biochemical characterization of fat body lipase was carried out through testing its activities against several factors, such as different temperatures, pH ranges, metal ions, and inhibitors ending by determination of their kinetic parameters with the use of p-nitrophenyl butyrate (PNPB) as a substrate. The highest activities of enzyme were determined at the temperature ranges of 35–37 °C and 37–40 °C and pH ranges of 7–9 and 7–10. The partially purified enzyme showed significant stimulation by Ca2+, K+, and Na+ metal ions indicating that fat body lipase is metalloproteinase. Lipase activity was strongly inhibited by some inhibitors; phenylmethylsulfonyl fluoride (PMSF), ethylene-diaminetetractic acid (EDTA), and ethylene glycoltetraacetic acid (EGTA) providing evidence of the presence of serine residue and activation of enzymes by metal ions. Kinetic parameters were 0.316 Umg− 1 Vmax and 301.95 mM Km. Conclusion Considering the purification of fat body lipase from larvae and the usage of some inhibitors especially ion chelating agents, it is suggested to develop a successful control of Galleria mellonella in near future by using lipase inhibitors.

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