Study of the distribution of the molecular orientation in thick polyethylene samples by X-ray diffraction, infra-red dichroism and Raman spectroscopy

Scanning microscopy was used to study the surface of human gallstones and the surface of fractures. The specimens were obtained by operation, washed with water, dried at room temperature and shadowcasted with carbon and aluminum. Most of the specimens belong to patients from a series of X-ray follow-up study, examined during the last twenty years. So it was possible to evaluate approximately the age of these gallstones and to get information on the intensity of growing and solving.Cholesterol, a group of bile pigment substances and different salts of calcium, are the main components of human gallstones. By X-ray diffraction technique, infra-red spectroscopy and by chemical analysis it was demonstrated that all three components can be found in any gallstone. In the presence of water cholesterol crystallizes in pane-like plates of the triclinic crystal system.

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Raman spectroscopy and X-ray diffraction of lithium niobate at temperatures up to 1300○-4.80pt○C

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:2005126021 ◽

2005 ◽

Vol 126 ◽

pp. 101-105 ◽

Cited By ~ 1

Author(s):

B. Moulin ◽

L. Hennet ◽

D. Thiaudière ◽

P. Melin ◽

P. Simon

Keyword(s):

Raman Spectroscopy ◽

Lithium Niobate ◽

X Ray Diffraction ◽

X Ray

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PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽

10.31266/at.v28i1.1434 ◽

2013 ◽

Vol 28 (1) ◽

Author(s):

Maya Komalasari ◽

Bambang Sunendar

Keyword(s):

Fourier Transform ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Sol Gel ◽

Crosslinking Agent ◽

X Ray Diffraction ◽

Nano Tio2 ◽

X Ray ◽

Infra Red ◽

Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1, yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

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A study on using expanded perlite with hydroxyapatite: Reinforced bio-composites

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1177/0954411921996565 ◽

2021 ◽

pp. 095441192199656

Author(s):

Erdoğan Karip ◽

Mehtap Muratoğlu

Keyword(s):

Body Fluid ◽

Xrd Analysis ◽

Cold Isostatic Pressing ◽

Expanded Perlite ◽

X Ray Diffraction ◽

Pressing Method ◽

X Ray ◽

Infra Red ◽

Ft Ir

People are exposed to different kinds of diseases or various accidents in life. Hydroxyapatite (HA) has been widely employed for bone treatment applications. In this study, HA was extracted from sheep bones. Bio-composites were doped with 1, 5, and 10 wt.% of expanded perlite and 5 wt.% of ZrO2–MgO-P2O5. The bio-composites were prepared by the cold isostatic pressing method (250 MPa) and sintered at 900°C for 1 h. In order to evaluate the characteristics of the bio-composites, microhardness, density, X-ray diffraction (XRD), Fourier transform infra-red spectroscopy (FT-IR), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) analyses were carried out on them. Additionally, the specimens whose characteristics were determined were kept in synthetic body fluid (SBF), and their in vitro behavior was examined. As a result, it was observed that microhardness increased as both the weight and the grain size of the expanded perlite were increased. Calcium silicate, tri-calcium phosphate, and hydroxyapatite were observed in the XRD analysis of all samples, and the formation of apatite structures was increased by addition of ZrO2–MgO–P2O5.

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Structural and Raman Vibrational Studies ofCeO2-Bi2O3Oxide System

Advances in Materials Science and Engineering ◽

10.1155/2009/502437 ◽

2009 ◽

Vol 2009 ◽

pp. 1-4 ◽

Cited By ~ 8

Author(s):

L. Bourja ◽

B. Bakiz ◽

A. Benlhachemi ◽

M. Ezahri ◽

J. C. Valmalette ◽

...

Keyword(s):

Solid Solution ◽

Raman Spectroscopy ◽

Phase Changes ◽

Phase System ◽

X Ray Diffraction ◽

X Ray ◽

Vibrational Studies ◽

Coprecipitation Route

A series of ceramics samples belonging to theCeO2-Bi2O3phase system have been prepared via a coprecipitation route. The crystallized phases were obtained by heating the solid precursors at600∘Cfor 6 hours, then quenching the samples. X-ray diffraction analyses show that forx<0.20a solid solutionCe1−xBixO2−x/2with fluorine structure is formed. For x ranging between 0.25 and 0.7, a tetragonalβ′phase coexisting with the FCC solid solution is observed. For x ranging between 0.8 and 0.9, a new tetragonalβphase appears. Theβ′phase is postulated to be a superstructure of theβphase. Finally, close tox=1, the classical monoclinicα Bi2O3structure is observed. Raman spectroscopy confirms the existence of the phase changes as x varies between 0 and 1.

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Influence of the Presence of Different Alkali Cations and the Amount of Fe(CN)6 Vacancies on CO2 Adsorption on Copper Hexacyanoferrates

Materials ◽

10.3390/ma12203371 ◽

2019 ◽

Vol 12 (20) ◽

pp. 3371 ◽

Cited By ~ 1

Author(s):

Svensson ◽

Grins ◽

Eklöf ◽

Eriksson ◽

Wardecki ◽

...

Keyword(s):

Thermogravimetric Analysis ◽

Prussian Blue ◽

Co2 Adsorption ◽

X Ray Diffraction ◽

Alkali Cations ◽

Prussian Blue Analogue ◽

X Ray ◽

Infra Red ◽

Adsorption Desorption ◽

Adsorption Capability

The CO2 adsorption on various Prussian blue analogue hexacyanoferrates was evaluated by thermogravimetric analysis. Compositions of prepared phases were verified by energy-dispersive X-ray spectroscopy, infra-red spectroscopy and powder X-ray diffraction. The influence of different alkali cations in the cubic Fm3m structures was investigated for nominal compositions A2/3Cu[Fe(CN)6]2/3 with A = vacant, Li, Na, K, Rb, Cs. The Rb and Cs compounds show the highest CO2 adsorption per unit cell, 3.3 molecules of CO2 at 20 C and 1 bar, while in terms of mmol/g the Na compound exhibits the highest adsorption capability, 3.8 mmol/g at 20 C and 1 bar. The fastest adsorption/desorption is exhibited by the A-cation free compound and the Li compound. The influence of the amount of Fe(CN)6 vacancies were assessed by determining the CO2 adsorption capabilities of Cu[Fe(CN)6]1/2 (Fm3m symmetry, nominally 50% vacancies), KCu[Fe(CN)6]3/4 (Fm3m symmetry, nominally 25% vacancies), and CsCu[Fe(CN)6] (I-4m2 symmetry, nominally 0% vacancies). Higher adsorption was, as expected, shown on compounds with higher vacancy concentrations.

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Melting and premelting of silicates: Raman spectroscopy and X-ray diffraction of Li2SiO3 and Na2SiO3

Physics and Chemistry of Minerals ◽

10.1007/bf00220727 ◽

1996 ◽

Vol 23 (3) ◽

Cited By ~ 58

Author(s):

Pascal Richet ◽

BjornO. Mysen ◽

Denis Andrault

Keyword(s):

Raman Spectroscopy ◽

X Ray Diffraction ◽

X Ray

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Amorphization of a proposed sorbent of strontium, brushite, CaHPO4•2H2O, studied by X-ray diffraction and Raman spectroscopy

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2020.152751 ◽

2021 ◽

Vol 545 ◽

pp. 152751

Author(s):

Marie-Noëlle de Noirfontaine ◽

Enrique Garcia-Caurel ◽

Daniel Funes-Hernando ◽

Mireille Courtial ◽

Sandrine Tusseau-Nenez ◽

...

Keyword(s):

Raman Spectroscopy ◽

X Ray Diffraction ◽

X Ray

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The Characteristic Evaluation of Hydroxyapatite Powders Synthesized from CaCO3 Refined from Oyster Shell and H3PO4

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.118.639 ◽

2006 ◽

Vol 118 ◽

pp. 639-644

Author(s):

Hye Sung Kim ◽

Su Chak Ryu

Keyword(s):

Bone Density ◽

Inductively Coupled Plasma ◽

Oyster Shell ◽

Atomic Emission ◽

Xrd Analysis ◽

X Ray Diffraction ◽

X Ray ◽

Inductively Coupled ◽

Infra Red ◽

Ft Ir

Hydroxyapatite (Ca10(PO4)6(OH)2, HAp) powders is synthesized using the mixed powders of CaCO3 refined from oyster shells and phosphoric acid (H3PO4-98%, Daejung) as starting materials. The characteristic evaluation and chemical analysis of the synthesized powders is performed by X-ray diffraction (XRD), Fourier-transformed infra-red spectroscopy (FT-IR), and inductively-coupled plasma atomic emission spectroscopy (ICPAES). XRD analysis of synthetic powder by heat treatment at 1300°C for 2hrs shows only HAp peaks corresponding to stoichiometric HAp. It is confirmed by ICP-AES test that impurities such as Zn, In, Ti, Ba, Cd, Pb, and Mn, is not detected at all, but small amounts of Ti and Be is observed (0.099ppm Ti and 0.002ppm Ba). Variation of bone density is measured by giving medication of HAp powder with drinking water into human body continuously for three month. After the medication, the bone density is higher than the medication before. This means that HAp powder made from this process can be used as improver of bone density.

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