Magnesium Nitrate as Additive for Synthesis of Mg(OH)2 Nanoparticles

Low Temperature ◽

Magnesium Nitrate ◽

Crystal Phase ◽

X Ray Diffraction ◽

X Ray ◽

Size And Morphology ◽

Magnesium nitrate was used as additive for synthesis of Mg(OH)2 (MH) nanoparticles at low temperature (70°C). Mg(OH)2 nanoparticles have platelet-like structure and approximately 40-60nm in thicknesses. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were applied to characterize the crystal phase. The supersaturation degree of solution effects the size and morphology of MH nanoparticles.

SiO2ZrO2 Thin Films as Low Temperature NO2 and O3 Sensors

10.4028/www.scientific.net/amr.1088.81 ◽

2015 ◽

Vol 1088 ◽

pp. 81-85 ◽

Cited By ~ 1

Author(s):

T.N. Myasoedova ◽

Victor V. Petrov ◽

Nina K. Plugotarenko ◽

Dmitriy V. Sergeenko ◽

Galina Yalovega ◽

...

Keyword(s):

Electron Microscopy ◽

Thin Films ◽

Low Temperature ◽

Annealing Temperature ◽

Sol Gel ◽

X Ray Diffraction ◽

X Ray ◽

Operating Temperatures ◽

Thin SiO2ZrO2films were prepared, up to 0.2 μm thick, by means of the sol–gel technology and characterized by a Scanning electron microscopy and X-ray diffraction. It is shown the presence of monoclinic, cubic and tetragonal phases of ZrO2in the SiO2matrix. The crystallites sizes depend on the annealing temperature of the film and amount to 35 and 56 nm for the films annealed at 773 and 973 K, respectively. The films resistance is rather sensitive to the presence of NO2and O3impurity in air at lower operating temperatures in the range of 30-60°C.

Synthesis, Structure and Properties of Super Fine LiMn2O4

10.4028/www.scientific.net/amr.177.9 ◽

2010 ◽

Vol 177 ◽

pp. 9-11 ◽

Cited By ~ 1

Author(s):

Jie Song ◽

Bing Xu ◽

De Xin Huang ◽

Cai Xia Li ◽

Qiang Li

Keyword(s):

Electron Microscopy ◽

Particle Size ◽

Electrode Material ◽

Structure And Properties ◽

X Ray Diffraction ◽

Mechanochemical Method ◽

X Ray ◽

Size And Morphology ◽

In this paper, super fine LiMn2O4 powder was synthesized by mechanochemical method starting from Li2CO3 and Mn2O3. The structure, size and morphology of LiMn2O4 were explored with X-ray diffraction and scanning electron microscopy (SEM). The electrochemical properties of LiMn2O4 were studied in 2 mol/L (NH4)2SO4 solution. The result showed that pure spinel LiMn204 powder was prepared after 8h grinding with 3.0KW of power and the particle size was about 1µm. Cyclic vohammetry curve indicate LiMn2O4 electrode material has better capacitive performances.

Effects of Plasma Nitriding on Low Temperature Salt-Bath Chromizing of W18Cr4V Steel

10.4028/www.scientific.net/amr.213.543 ◽

2011 ◽

Vol 213 ◽

pp. 543-547

Author(s):

Jin Ling Ye ◽

Feng Ye

Keyword(s):

Electron Microscopy ◽

Low Temperature ◽

Plasma Nitriding ◽

Xrd Analysis ◽

Salt Bath ◽

Chromium Concentration ◽

X Ray Diffraction ◽

X Ray ◽

Effects of plasma nitriding on low temperature salt-bath chromizing of W18Cr4V steel is studied .The chromizing process is investigated by means of optical microscopy(OM), scanning electron microscopy(SEM), X-ray diffraction (XRD). Results show that the specimens are chromized successfully by low temperature salt-bath subjected to plasma nitriding. A chromized layer with average 3.3μm in thickness and 1200HV-1300HV in microhardness is formed on the substrate by chromizing at 610°C for 6h. XRD analysis show that the chromized layer is composed of Cr23C6, CrN, Cr/Fe, (Cr, Fe)7C3 , (Cr, Fe)2N and the surface chromium concentration reaches 77.67%.

Synthesis of Mg(OH)2 Nanoparticles from MgO Using Magnesium Acetate as Additive

10.4028/www.scientific.net/amr.531.467 ◽

2012 ◽

Vol 531 ◽

pp. 467-470

Author(s):

Qing Gang Kong ◽

Hai Yan Qian

Keyword(s):

Electron Microscopy ◽

Low Temperature ◽

Size Distribution ◽

Magnesium Acetate ◽

X Ray Diffraction ◽

X Ray ◽

Effect Mechanism ◽

Phase Size ◽

Mg(OH)2 (MH) nanoparticles were synthesized by hydration of the light-burned MgO at low temperature (70°C) with the additive of magnesium acetate. Mg(OH)2 nanoparticles have platelet-like structure and approximately 20-40 nm in thicknesses. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were applied to characterize the crystal phase, size distribution and morphology of the crystal particles. The effect mechanism of magnesium acetate was proposed

A Post-Mortem Study of Stacked 16 Ah Graphite//LiFePO4 Pouch Cells Cycled at 5 °C

Batteries ◽

10.3390/batteries5020045 ◽

2019 ◽

Vol 5 (2) ◽

pp. 45 ◽

Cited By ~ 4

Author(s):

Arianna Moretti ◽

Diogo Vieira Carvalho ◽

Niloofar Ehteshami ◽

Elie Paillard ◽

Willy Porcher ◽

...

Keyword(s):

Electron Microscopy ◽

Low Temperature ◽

Outer Part ◽

Photoemission Spectroscopy ◽

Post Mortem ◽

X Ray Diffraction ◽

X Ray ◽

Cell Components ◽

Herein, the post-mortem study on 16 Ah graphite//LiFePO4 pouch cells is reported. Aiming to understand their failure mechanism, taking place when cycling at low temperature, the analysis of the cell components taken from different portions of the stacks and from different positions in the electrodes, is performed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoemission spectroscopy (XPS). Also, the recovered electrodes are used to reassemble half-cells for further cycle tests. The combination of the several techniques detects an inhomogeneous ageing of the electrodes along the stack and from the center to the edge of the electrode, most probably due to differences in the pressure experienced by the electrodes. Interestingly, XPS reveals that more electrolyte decomposition took place at the edge of the electrodes and at the outer part of the cell stack independently of the ageing conditions. Finally, the use of high cycling currents buffers the low temperature detrimental effects, resulting in longer cycle life and less inhomogeneities.

Fabrication of Mn2O3 Nanowire with Ultra Fine Morphology via an Electrospinning Technology

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.532 ◽

2008 ◽

Vol 368-372 ◽

pp. 532-534

Author(s):

Rui Zhang ◽

Hui Wu ◽

Dan Dan Lin ◽

Wei Pan

Keyword(s):

Electron Microscopy ◽

Low Temperature ◽

Smooth Surface ◽

X Ray Diffraction ◽

X Ray ◽

Fine Morphology ◽

Thin Mn2(NO3)2/PVA precursor nanowire was fabricated via electrospinning technology at a low temperature in this paper. After dried at 150°C for 10 hours and then sintered at 450°C for 2 hours, Mn2O3 nanowire was successfully obtained. The nanowire was characterized using X-ray diffraction and scanning electron microscopy. The results showed that the nanowire was composed of pure Mn2O3 phase. The nanowire exhibited smooth surface and continuous sharp with length of tens of micrometer. The diameter of Mn2O3 nanowire was measured and calculated through SEM, which showed most probable value of about 110 nm and 270 nm. The reason of the diameter separation was also discussed.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100111550 ◽

1984 ◽

Vol 42 ◽

pp. 288-289

Author(s):

Vicki L. Baliga ◽

Mary Ellen Counts

Keyword(s):

Electron Microscopy ◽

Calcium Oxalate ◽

Growth And Development ◽

Polarized Light ◽

Calcium Oxalate Crystals ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

Environmental scanning electron microscopy of fresh human gallstones reveals new morphologies of precipitated calcium salts

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100131243 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1322-1323

Author(s):

Howard S. Kaufman ◽

Keith D. Lillemoe ◽

John T. Mastovich ◽

Henry A. Pitt

Keyword(s):

Electron Microscopy ◽

Environmental Scanning Electron Microscopy ◽

Environmental Scanning ◽

X Ray Diffraction ◽

Calcium Salts ◽

Cholesterol Gallstones ◽

X Ray ◽

Ca Carbonate ◽

Gallstones contain precipitated cholesterol, calcium salts, and proteins. Calcium (Ca) bilirubinate, palmitate, phosphate, and carbonate occurring in gallstones have variable morphologies but characteristic windowless energy dispersive x-ray (EDX) spectra. Previous studies of gallstone microstructure and composition using scanning electron microscopy (SEM) with EDX have been limited to dehydrated samples. In this state, Ca bilirubinates appear as either glassy masses, which predominate in black pigment stones, or as clusters, which are found mostly in cholesterol gallstones. The three polymorphs of Ca carbonate, calcite, vaterite, and aragonite, have been identified in gallstones by x-ray diffraction, however; the morphologies of these crystals vary in the literature. The purpose of this experiment was to study fresh gallstones by environmental SEM (ESEM) to determine if dehydration affects gallstone Ca salt morphology.Gallstones and bile were obtained fresh at cholecystectomy from 6 patients. To prevent dehydration, stones were stored in bile at 37°C. All samples were studied within 4 days of procurement.

PENINGKATAN LAJU DISOLUSI ACYCLOVIR DENGAN METODE SISTEM DISPERSI PADAT MENGGUNAKAN POLOXAMER 188

SCIENTIA : Jurnal Farmasi dan Kesehatan ◽

10.36434/scientia.v5i1.61 ◽

2016 ◽

Vol 5 (1) ◽

pp. 6

Author(s):

Budi Setiawan ◽

Erizal Zaini ◽

Salman Umar

Keyword(s):

Electron Microscopy ◽

Thermal Analysis ◽

Fourier Transform ◽

Differential Thermal Analysis ◽

Fourier Transform Infrared ◽

X Ray Diffraction ◽

Poloxamer 188 ◽

X Ray ◽

Sebuah penelitian tentang sistem dispersi padat dari asiklovir dengan poloxamer 188 telah dilakukan formulasi dengan pencampuran secara fisika dengan rasio 1 : 1, 1 : 3, 1 : 5 dan dispersi padat 1 : 1, 1 : 3, 1 : 5 dan penggilingan 1:1 sebagai pembanding. Dispersi padat dibuat menggunakan metode pencairan (fusi), yang digabung dengan poloxamer 188 pada hotplate kemudian asiklovir dimasukkan ke dalam hasil poloxamer 188 lalu di kocok hingga membentuk masa homogen. Semua formula yang terbentuk termasuk asiklovir poloxamer 188 murni dianalisis karakterisasinya dengan Differential Thermal Analysis (DTA), X-ray Diffraction, Scanning Electron Microscopy (SEM), dan Fourier Transform Infrared (FTIR), kemudian pengambilan dilakukan (penentuan kadar) mengunakan spektrofotometer UV pada panjang gelombang 257,08 nm dan uji laju disolusi dengan aquadest bebas CO2 menggunakan metode dayung. Hasil pengambilan (penentuan kadar) menunjukkan bahwa semua formula memenuhi persyaratan farmakope Amerika edisi 30 dan farmakope Indonesia edisi 4 yaitu 95-110%. Sedangkan hasil uji laju disolusi untuk campuran fisik 1: 1, dan dispersi padat 1: 1, dan penggilingan 1: 1 menunjukkan peningkatan yang nyata dibandingkan asiklovir murni. Hal ini juga dapat dilihat dari hasil perhitungan statistik menggunakan analisis varian satu arah SPSS 17.

Structural Characterization of Gallbladder Stones Using Energy Dispersive X-ray Spectroscopy and X-ray Diffraction

Combinatorial Chemistry & High Throughput Screening ◽

10.2174/1386207321666180913113803 ◽

2018 ◽

Vol 21 (7) ◽

pp. 495-500 ◽

Cited By ~ 1

Author(s):

Hassan A. Almarshad ◽

Sayed M. Badawy ◽

Abdalkarem F. Alsharari

Keyword(s):

Electron Microscopy ◽

Energy Dispersive ◽

Spectroscopic Techniques ◽

X Ray Diffraction ◽

Major Health Problem ◽

X Ray ◽

Gallbladder Stones ◽

Pure Cholesterol ◽

Aim and Objective: Formation of the gallbladder stones is a common disease and a major health problem. The present study aimed to identify the structures of the most common types of gallbladder stones using X-ray spectroscopic techniques, which provide information about the process of stone formation. Material and Method: Phase and elemental compositions of pure cholesterol and mixed gallstones removed from gallbladders of patients were studied using energy-dispersive X-ray spectroscopy combined with scanning electron microscopy analysis and X-ray diffraction. Results: The crystal structures of gallstones which coincide with standard patterns were confirmed by X-ray diffraction. Plate-like cholesterol crystals with laminar shaped and thin layered structures were clearly observed for gallstone of pure cholesterol by scanning electron microscopy; it also revealed different morphologies from mixed cholesterol stones. Elemental analysis of pure cholesterol and mixed gallstones using energy-dispersive X-ray spectroscopy confirmed the different formation processes of the different types of gallstones. Conclusion: The method of fast and reliable X-ray spectroscopic techniques has numerous advantages over the traditional chemical analysis and other analytical techniques. The results also revealed that the X-ray spectroscopy technique is a promising technique that can aid in understanding the pathogenesis of gallstone disease.