Fused Silica Etching Research Papers (original) (raw)

We studied the influence of substrata topography on the behaviour of murine P388D1 macrophage cell line. Cells were plated on plain fused silica substrata or substrata with microfabricated grooves of varying depth and width. Cell spread... more

We studied the influence of substrata topography on the behaviour of murine P388D1 macrophage cell line. Cells were plated on plain fused silica substrata or substrata with microfabricated grooves of varying depth and width. Cell spread area, elongation, orientation and F‐actin content were measured on plain substratum and 6 sets of gratings. The speed and persistence of cell movement were also studied.We found that patterned substrata substantially activated cell spreading and elongation and significantly increased the persistence and speed of cell movement, shallow grooves being more effective than deep ones. The contact of cells with micropatterned substrata significantly increased the F‐actin content in cells. The sensitivity of LPS (lipopolisaccharide) stimulated and unstimulated macrophages to topographical cues was also compared.

Fragrance ingredients cover a wide range of aromas. Categorizing, and classifying the language is difficult taking into account the reading needed to develop one's word phraseology. Part of the problem is where to start, and how to write... more

Fragrance ingredients cover a wide range of aromas. Categorizing, and classifying the language is difficult
taking into account the reading needed to develop one's word phraseology. Part of the problem is where to
start, and how to write an odor description. The book was created due to my desire to share my notes to an
art that is fascinating only understood well by a few. It is based on many years of work including an extensive bibliography of reference sources including my own notes.

ZnO thin films were grown by pulsed laser deposition on three different substrates: sapphire (0 0 0 1), MgO (1 0 0) and fused silica (FS). The structure and morphology of the films were characterized by x-ray diffraction and scanning... more

ZnO thin films were grown by pulsed laser deposition on three different substrates: sapphire (0 0 0 1), MgO (1 0 0) and fused silica (FS). The structure and morphology of the films were characterized by x-ray diffraction and scanning electron microscopy and defect studies were carried out using slow positron implantation spectroscopy (SPIS). Films deposited on all substrates studied in this work exhibit the wurtzite ZnO structure and are characterized by an average crystallite size of 20–100 nm. However, strong differences in the microstructure of films deposited on various substrates were found. The ZnO films deposited on MgO and sapphire single-crystalline substrates exhibit local epitaxy, i.e. a well-defined relation between film crystallites and the substrate. Domains with different orientation relationships with the substrate were found in both films. On the other hand, the film deposited on the FS substrate exhibits fibre texture with random lateral orientation of crystallites...

We report on the fabrication of shellac thin films on silicon substrates by matrix-assisted pulsed laser evaporation (MAPLE) using methanol as matrix. Very adherent, dense, and smooth films were obtained by MAPLE with optimized deposition... more

We report on the fabrication of shellac thin films on silicon substrates by matrix-assisted pulsed laser evaporation (MAPLE) using methanol as matrix. Very adherent, dense, and smooth films were obtained by MAPLE with optimized deposition parameters, such as laser wavelength and laser fluence. Films with a root mean square (RMS) roughness of 11 nm measured on 40 × 40 µm2 were obtained for a 2000-nm-thick shellac film deposited with 0.6 J/cm2 fluence at a laser wavelength of 266 nm. The MAPLE films were tested in simulated gastric fluid in order to assess their capabilities as an enteric coating. The chemical, morphological, and optical properties of shellac samples were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and atomic force microscopy (AFM).

We introduce a mesh-free computational model for simulation of hypervelocity impact (HVI) phenomena. Our proposed scheme is based on the Discrete Element Method (DEM) and this paper constitutes the first application of the DEM to the... more

We introduce a mesh-free computational model for simulation of hypervelocity impact (HVI) phenomena. Our proposed scheme is based on the Discrete Element Method (DEM) and this paper constitutes the first application of the DEM to the simulation of impact events in the hypervelocity regime [1]. We provide a quantitative computational analysis of impact generated debris clouds and a comprehensive parameter study by varying key parameters of our model. We compare our findings from the simulations with recent HVI experiments and outline the experimental methods that we develop to gain data on impact fragmentation for validating our approach. The ultimate objective of our work is to apply DEM for the simulation of complex spacecraft fragmentations resulting from space debris impact and spacecraft collisions.

As there is a rise in adulteration of honey which leads to the formation of a carcinogenic and cytotoxic compound, 5-hydroxymethyl-2-furfural (HMF) in honey, it has become very essential to test honey for the presence of this compound.... more

As there is a rise in adulteration of honey which leads to the formation of a carcinogenic and cytotoxic compound, 5-hydroxymethyl-2-furfural (HMF) in honey, it has become very essential to test honey for the presence of this compound. Honey is a natural sweet product that is produced by honey bees (Apis mellifera). This carcinogenic compound, 5-hydroxymethyl-2-furfural is developed on dehydration of reducing sugars present in honey in acidic conditions. The concentration of this toxic compound in fresh honey is mostly absent or is present in very low amounts, but its concentration increases during processing, upon storage for longer periods, and upon heating/storing at higher temperatures. This compound causes toxic fatal effects (mutagenic, chromosomal aberrations, genotoxic, organotoxic, carcinogenic, cytotoxicity towards mucous membranes, the skin, the eyes, and the upper respiratory tract). An accurate and speci c liquid chromatographic method was developed due to the urgent requirement for an analytical method to estimate the quantity of 5-hydroxymethylfurfural in honey. A mobile phase with a combination of Acetonitrile and Water with 0.2% Formic Acid was used with a ow rate of 0.6 ml/minute and the separation was done on Phenomenex Non-Polar C18 Column with dimensions of 150 mm X 4.6 mm X 3 µm at a wavelength of 282 nm. The Calibration curve with R 2 value of 0.999 was obtained. These results were repeated two times in the laboratory, hence Repeatability Precision was performed to validate the results. The amount of HMF in honey in the samples were found to be within the limit of 40 mg/kg as per FSSAI. The amount of HMF present in Sample 1 and Sample 2 was found to be 3.80 mg/kg and 6.50 mg/kg, respectively. This new HPLC method developed would be economical, reproducible and repeatable.