Bibliografie tematiche / Scanning Electron miscroscopy

Letteratura scientifica selezionata sul tema "Scanning Electron miscroscopy"

Autore: Grafiati

Pubblicato: 22 giugno 2024

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Articoli di riviste

Articoli di riviste sul tema "Scanning Electron miscroscopy":

Cohen-Gould, Leona, e Thomas F. Robinson. "A Novel Method of Immuno-Gold Staining For TEM and HVEM". Proceedings, annual meeting, Electron Microscopy Society of America 43 (agosto 1985): 438–39. http://dx.doi.org/10.1017/s0424820100119016.

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Advances in Immunochemistry allow for labelling of various tissue components with highly specific antibodies, that in turn may be labelled with marker substances such as flourescein for light microscopy, or any of a number of electron-dense substances, such as ferritin and colloldal gold, for localization with scanning and transmission electron miscroscopy. The methods used for transmission electron microscopy are designed to minimize damage to antigenic sites while preserving ultrastructure. The methods include embedding of the tissue in resins with low-temperature curing characteristics such as Polyethylene glycol (PEG) or Lowicryl K4M (Chemische Werke Lowl, F.R.G.). The tissue is embedded, sectioned, and mounted on grids. The Immuno-reactions are then carried out on these mounted sections.

Badaruddin, Mohammad. "Na₂SO₄ Induced Hot Corrosion of Aluminized Low Carbon Steel at 700 °C". Applied Mechanics and Materials 493 (gennaio 2014): 761–66. http://dx.doi.org/10.4028/www.scientific.net/amm.493.761.

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The oxidation kinetics of hot-dip aluminized AISI 1020 steel with Na2SO4 deposit was investigated at 700 °C for 49 h in static air. The scale morphologies were observed by means of metallograpy, scanning electron miscroscopy (SEM), electron dispersive spectroscopy (EDS) and X-ray analyses. The accelerated oxidation of aluminized steel was attributed to the formation of aluminum-sulphides which allowed the rapid diffusion of Fe ions in the aluminide layer to the formation of iron oxide. In addition, the Al-sulphides precipitations in the alumina scale causes the Al-depletion such that Al2O3 layer fails to form a protective layer. Consequently, the kinetics rate of aluminized was increased.

Rosa-Freitas, Maria Goreti, e Leonidas M. Deane. "The neotype of anopheles albitarsis (Diptera: culicidae)". Memórias do Instituto Oswaldo Cruz 84, n. 3 (settembre 1989): 289–302. http://dx.doi.org/10.1590/s0074-02761989000300002.

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Anopheles albitarsis neotype is described from specimens collected in Baradero, Argentina, in Shannon's trap, in horse and pig stables and on the progeny of engorded females. The description includes illustrations of adult female, male and female genitalias, scanning electron miscroscopy of the eggs and complete chaetotaxy of pupa and larva. The importance for electing a neotype is based on the realization that An. albitarsis is a complex of cryptic species. It is an attempt to provide typt-locality specimens with which other memebers of the group can be compared.

Griffin, Brendan J. "Charge contrast imaging of material growth and defects in environmental scanning electron miscroscopy-linking electron emission and cathodoluminescence". Scanning 22, n. 4 (6 dicembre 2006): 234–42. http://dx.doi.org/10.1002/sca.4950220402.

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Hardi, Amelina Dwika, Rahma Joni, Syukri Syukri e Hermansyah Aziz. "Pembuatan Karbon Aktif dari Tandan Kosong Kelapa Sawit sebagai Elektroda Superkapasitor". Jurnal Fisika Unand 9, n. 4 (25 gennaio 2021): 479–86. http://dx.doi.org/10.25077/jfu.9.4.479-486.2020.

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Pembuatan karbon aktif dari Tandan Kosong Kelapa Sawit (TKS) sebagai elektroda superkapasitor sudah diteliti. Karbon aktif dibuat dari proses karbonisasi dan aktivasi menggunakan Kalium Hidroksida (KOH). Karbon aktif TKS dikarbonisasi melalui pembakaran sampel pada suhu 400°C dan diaktivasi dengan KOH pada suhu 800°C dalam lingkungan gas nitrogen. Karbon aktif TKS dikarakterisasi menggunakan Energi Dispersive X-Ray (EDX), X-Ray Difraction (XRD), Scanning Electron Miscroscopy (SEM), Surface Area Analyzer (SAA). Komposisi unsur karbon yang dihasilkan dari karbon aktif TKS adalah sebesar 88,93 %wt. Struktur kristalit dari karbon aktif TKS menunjukkan struktur amorf pada sudut 2θ 26,20° dan 43,08°. Hasil analisis SAA dengan metode Brunauer-Emmet-Teller (BET) didapatkan luas permukaan karbon aktif TKS sebesar 898,229 m2/g. Pengukuran sifat listrik karbon Aktif TKS sebagai elektroda superkapasitor menggunakan larutan elktrolit H2SO4 1M dengan metoda Cyclic Voltametry (CV) didapatkan nilai kapasitansi spesifik sebesar 107,83 F/g. Preparation of activated carbon from Oil Palm Empty Fruit Bunch (TKS) as a supercapacitor electrode has been investigated. Activated carbon is made from carbonization and activation processes using Potassium Hydroxide (KOH). Activated carbon TKS is carbonized by burning the sample at 400°C and activated with KOH at 800°C in a nitrogen gas environment. Activated carbon TKS was characterized using Energi Dispersive X-Ray (EDX), X-Ray Difraction (XRD), Scanning Electron Miscroscopy (SEM), Surface Area Analyzer (SAA). The composition of the element carbon produced from activated carbon TKS is 88.93% wt. The crystallite structure of TKS activated carbon shows an amorphous structure at an angle of 2θ 26,20° and 43,08°. The results of the SAA analysis by the Brunauer-Emmet-Teller (BET) method showed that the surface area of the TKS activated carbon was 898.229 m2/g. Measurement of electrical properties of activated carbon TKS as a supercapacitor electrode using a 1M H2SO4 electrolyte solution with the Cyclic Voltametry (CV) method obtained specific capacitance values of 107.83 F /g.

Pontes do Nascimento, Nilson Machado, Bárbara Ronara Machado de Lima, José Roberto Zamian, Carlos Emmerson Ferreira da Costa, Luís Adriano Santos do Nascimento, Rafael Luque e Geraldo Narciso da Rocha Filho. "Synthesis of Mesoporous Zn1−xMxAl2O4 Substituted by Co2+ and Ni2+ Ions and Application in the Photodegradation of Rhodamine B". Materials 13, n. 9 (6 maggio 2020): 2150. http://dx.doi.org/10.3390/ma13092150.

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A new mesoporous Zn1-xMxAl2O4 photocatalyst was prepared using the metal-chitosan complexation method with different degrees of Zn2+ cation substitution with cobalt and nickel ions (M = Co2+ and Ni2+). Characterization using X-ray diffraction (XRD), Infrared absorption spectrometry (FTIR), energy dispersion spectroscopy (EDS), diffuse reflectance spectrometry (DRS), scanning electron miscoscopy (SEM), transmission electron miscroscopy (TEM), N2 adsorption- desorption isotherms using the Barrett-Joyner-Halenda (BJH) method, thermogravimetric analysis (TG) and differential thermal analysis (DTA) confirmed the formation of the spinel phase and high purity for all samples. N2 adsorption/desorption and size pore distribution confirmed the high surface area. The photocatalytic activity of Zn1-xMxAl2O4 and the effect of replacing Zn2+ ions with Ni2+ and Co2+ on the degradation of rhodamine B under ultraviolet light were studied in detail. The sample containing 0.1 mol of cobalt had the highest removal rate reaching 83%, favored by surface area and material bandgap (109 m2 g−1 and 2.19 eV, respectively).

Apriani, Ida Nur Apriani, e Jarnuzi Gunlazuardi. "SINTESIS DAN KARAKTERISASI N DOPED TiO2 (N/TiO2) NANOTUBE SERTA UJI AKTIVITAS FOTOKATALISIS TERHADAP ZAT WARNA RHODAMIN B". Jurnal Teknologi dan Manajemen 19, n. 1 (8 aprile 2021): 27–32. http://dx.doi.org/10.52330/jtm.v19i1.21.

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Telah dilakukan sintesis fotokatalis N/TiO2 bermofologi nanotube dengan metode anodisasi menggunakan ammonium nitrat (NH4NO3) sebagai sumber dopan pada berbagai variasi konsentrasi (0,5M , 1M, 2M), dilanjutkan dengan kalisinasi pada suhu 4500C selama 2 jam untuk mendapatkan fasa kristal anatase. Karakterisasi dilakukan menggunakan Scanning Electron Miscroscopy (SEM), Fourier Transform Infra Red (FT-IR), X-ray Diffraction (XRD), dan DRS (Diffused Reflectant Spectrometry) UV-Vis. Pengujian Linear Sweep Voltametri dan Multi Pulse Anperiometri pada fotokatalis N/TiO2 telah berhasil diterapkan untuk degradasi senyawa Rhodamin B menggunakan sinar UV maupun sinar tampak. Aplikasi dari uji fotoelektrokatalisis menggunakan sinar tampak untuk N/TiO2-NT memberikan hasil eliminasi sebesar 47,86%, sedangkan bila menggunakan TiO2 nanotube tanpa dopan eleminasi hanya sebesar 25,49%. Hal ini menunjukkan bahwa proses doping yang dilakukan telah berhasil menyisipkan nitrogen kedalam matrik TiO2 nanotube dan memperbaiki kinerja fotokatalisis nya di daerah sinar tampak.

Marina, Dewi, e Widodo Budi Kurniawan. "Karakteristik Karbon Aktif Limbah Kulit Lada (Piper Nigrum L) sebagai Elektroda Superkapasitor". Jurnal Riset Fisika Indonesia 2, n. 1 (30 dicembre 2021): 7–14. http://dx.doi.org/10.33019/jrfi.v2i1.3171.

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Pemenuhan kebutuhan energi dibutuhkan suatu piranti penyimpan yang memiliki kapasitansi spresifik yang tinggi yaitu superkapasitor. Superkapasitor adalah perangkat penyimpan muatan yang memiliki kapasitansi spesifik yang tinggi. Dalam penelitian ini telah dilakukan preparasi dan karakterisasi karbon aktif dari limbah kulit lada sebagai bahan elektroda superkapasitor. Karbon diaktivasi dengan variasi aktivator NaOH 1 M, 3 M dan 5 M dilanjutkan dengan pemanasan pada suhu 700˚ C selama 3 jam dengan dialiri gas nitrogen (N2). Karbon selanjutnya dikarakterisasi menggunakan Scanning Electron Miscroscopy-Energy Dispersive Spektroscopy (SEM-EDS), Brunauer-Emmett-Teller (BET) dan pengukuran kapasitansi menggunakan metode Cyclic Voltametry (CV). Hasil pengujian menunjukkan karbon aktif limbah kulit lada berpori dengan bentuk pori bulat pada sampel 3 M dan 5 M, sedangkan pada 1 M terdapat pori berongga yang pipih dan panjang. Hasil EDS setiap sampel memiliki kandungan unsur karbon (C) secara berurut yaitu 77,57%, 75,96%, dan 74,62%. Hasil BET menunjukkan luas permukaan maksimum sebesar 149,319 m2/g. Kapasitansi elektroda superkapastitor tertinggi diperoleh pada konsentrasi 5 M dengan laju scan 1 mV/s yaitu 12,68 F/g.

Almuchty, Alissa Putri. "PEMANFAATAN KULIT RAMBUTAN (Nephelium lappaceum) SEBAGAI ADSORBEN LOGAM TIMBAL (Pb)". Lingkar : Journal of Environmental Engineering 1, n. 1 (1 luglio 2020): 1–6. http://dx.doi.org/10.22373/ljee.v1i1.843.

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Present of lead as a heavy metal can be harmful to health. One possible method to reduce the presence of lead metal content is obtained through the adsorption process using adsorbent from rambutan rind. This study aimed to determine the effectiveness of activated charcoal from rambutan rind in absorbing lead metal with variations of difference adsorbent mass and stirring time. In this study, chemical activation was carried out by soaking the rambutan rind using 0.1 M NaOH solution for 24 hours. Adsorbents were characterized using Scanning Electron Miscroscopy (SEM) to determine the surface structure and particle size of the adsorbent. Furthermore, the adsorption process was carried out by contacting the adsorbent with lead solution based on the time difference of 10, 20 and 30 minutes and the adsorbent mass of 5, 10 and 15 grams. Based on the test results, the lowest concentration of lead was 1.692 and the highest concentration was 2.983. The most effective absorption of lead was at a level of 15 grams with a stirring time of 30 minutes with an absorption effectiveness of 83.30%.

Letícia Molteni Aguiar, Lilian Eiko Maekawa, Adriana Chung e Maria Renata Giazzi Nassri. "Evaluation of dentin cleansing by a detergent derived from castor oil (Ricinus communis) used as root canal irrigant: a scanning electron miscroscopy study". RSBO 7, n. 4 (22 dicembre 2011): 445–9. http://dx.doi.org/10.21726/rsbo.v7i4.1175.

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Introduction and objective: To evaluate, by scanning electron microscopy (SEM), the cleaning of root canal walls after biomechanical preparation and irrigation with castor oil (Endoquil®) and 0.5% sodium hypochlorite (NaOCl). Material and methods: Fifteen maxillary incisors were subjected to standardized root canal instrumentation with different irrigants (n = 5): G1 – Endoquil; G2 – 0.5% NaOCl; G3 – saline solution (control). After instrumentation, the teeth were prepared for SEM analysis (X 2000 original magnification) to evaluate the cleaning of cervical, middle and apical thirds. The area analyzed was quantified according to the percentage of open and closed tubules and data were statistically analyzed by ANOVA and Kruskal Wallis tests. Results: Statistical analysis showed that Endoquil was similar to 0.5% NaOCl at the apical third. However, there was statistically significant difference at the cervical and middle thirds, between these two groups. Conclusion: It was concluded that Endoquil presented better results at the middle third while 0.5% NaOCl presented better results at the cervical third; at the apical third, both irrigants were similar.

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