Surface Morphology Investigation of Poly(ether ether ketone) Immobilized with Heparin and Bovine Serum Albumin

2013 ◽  
Vol 683 ◽  
pp. 409-412
Author(s):  
Hui Sun ◽  
Rui Chao Chen ◽  
Biao Yang ◽  
Guo Zhi Xu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bovine Serum Albumin ◽  
Surface Morphology ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Scanning Electron

The surface topography of poly(ether ether ketone) (PEEK) film immobilized with heparin and Bovine Serum Albumin (BSA) was characterized via scanning electron microscopy (SEM). Compared with the unmodified film, the surface of modified film changed and become rough, which indirectly proved the successful introduction of monomer and biomolecule on PEEK

scholarly journals Anti-Foulant Ultrafiltration Polymer Composite Membranes Incorporated with Composite Activated Carbon/Chitosan and Activated Carbon/Thiolated Chitosan with Enhanced Hydrophilicity

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 827
Author(s):  
Syeda Samia Nayab ◽  
M. Asad Abbas ◽  
Shehla Mushtaq ◽  
Bilal Khan Niazi ◽  
Mehwish Batool ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Contact Angle ◽  
Activated Carbon ◽  
Bovine Serum Albumin ◽  
Bovine Serum ◽  
Carbon Composite ◽  
Flux Rate ◽  
Thiolated Chitosan ◽  
Scanning Electron

A rapid increase in population worldwide is giving rise to the severe problem of safe drinking water availability, necessitating the search for solutions that are effective and economical. For this purpose, membrane technology has shown a lot of promise but faces the challenge of fouling, leading to a reduction in its lifetime. In this study, ultrafiltration polyethersulfone membranes were synthesized in two different concentrations, 16% wt. and 20% wt., using the phase inversion method. Chitosan and activated carbon were incorporated as individual fillers and then as composites in both the concentrations. A novel thiolated chitosan/activated carbon composite was introduced into a polyethersulfone membrane matrix. The membranes were then analyzed using Attenuated Total Reflection–Fourier-Transform Infrared spectroscopy (ATR-FTIR), Scanning Electron Microscopy (SEM), optical profilometry, gravimetric analysis, water retention, mechanical testing and contact angle. For membranes with the novel thiolated chitosan/activated carbon composite, Scanning Electron Microscopy micrographs showed better channels, indicating a better permeability possibility, reiterated by the flux rate results. The flux rate and bovine serum albumin flux were also assessed, and the results showed an increase from 105 L/m2h to 114 L/m2h for water flux and the antifouling determined by bovine serum albumin flux increased from 23 L/m2h to 51 L/m2h. The increase in values of water uptake from 22.84% to 76.5% and decrease in contact angle from 64.5 to 55.7 showed a significant increase in the hydrophilic character of the membrane.

Localised application of an activating signal to a cell: experimental use of fibronectin bound to beads and the implications for mechanisms of adhesion

1992 ◽  
Vol 101 (2) ◽  
pp. 427-436
Author(s):  
A.S. Curtis ◽  
M. McGrath ◽  
L. Gasmi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bovine Serum Albumin ◽  
Bovine Serum ◽  
Signal Molecule ◽  
A Cell ◽  
Experimental Use ◽  
Independent Mode ◽  
Scanning Electron ◽  
Mechanisms Of Adhesion

Small beads derivatised with fibronectin or with bovine serum albumin are allowed to attach to BHK cells in suspension at low ratios of beads to cells. In this way populations of cells bearing predominantly one bead per cell can be prepared. We show that the attachment of one bead per cell affects the adhesion and spreading of that cell on substrata, raising adhesion and increasing spreading if the signal molecule is fibronectin, decreasing these quantities if the bead bears BSA. The experiments are conducted in the absence of other sources of exogenous fibronectin and in some cases in the additional absence of endogenous sources. The effects are especially marked if the substratum is adsorbed haemoglobin on which control cells show little attachment or spreading. We further show by interference reflection microscopy and by scanning electron microscopy that the beads are found on the non-adhering side (uppermost or outer) of the cell when fibronectin-bearing beads are used, presumably because fibronectin will not attach to haemoglobin. The increased adhesion and spreading found in such cases must be attributed to an activation produced by the bead, which spreads to other parts of the cell and which activates a fibronectin-independent mode of adhesion.

Isolasi Dan Karakterisasi Bentonit Alam Menjadi Nanopartikel Monmorillonit

2018 ◽  
Vol 3 (1) ◽  
pp. 12 ◽  
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

<p>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.</p><p><em>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.</em></p>

Deposition of Polypyrrole Onto a Novel Polymer Electrode for Use in a Biomimetic Artificial Excitable Cell Membrane

2010 ◽  
Author(s):  
Christina V. Haden ◽  
Donald A. Jordan ◽  
Pamela M. Norris
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cell Membrane ◽  
Surface Morphology ◽  
Polymer Membrane ◽  
Electroactive Polymer ◽  
Gating System ◽  
Excitable Cell ◽  
Semi Solid ◽  
Scanning Electron

A novel and inexpensive bucky gel electrode has been investigated for use as the electrode substrate for deposition of polypyrrole. The electroactive polymer membrane was successfully deposited and the surface morphology studied using scanning electron microscopy. Given the properties of the bucky gel electrode and its ability to conduct ions, this work establishes the first step towards a semi-solid ion-gating system to be used in further applications.

Analyse of Indium Loss in Preparation of CuInSe2 Flims for Solar Cells

2011 ◽  
Vol 183-185 ◽  
pp. 1837-1841
Author(s):  
Lei Sha ◽  
Yan Lai Wang ◽  
Shi Liang Ban
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Stainless Steel ◽  
Solar Cells ◽  
Surface Morphology ◽  
Energy Dispersive Spectroscopy ◽  
Titanium Substrates ◽  
Selenization Process ◽  
Scanning Electron

CuInSe2 thin films were obtained by selenization of the Cu-In precursors in the atmosphere of Se vapour, which were prepared on stainless steel and titanium substrates by electrodeposition. The films were characterized by XRD, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The respective influences of composition, phases and surface morphology of Cu-In precursors on indium loss were investigated. The results indicate that the indium loss occurs in selenization process because of volatile In2Se arising. The indium loss is less in selenization process of Cu-In precursors contained CuIn, Cu2In and In phases.

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