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Your search keyword '"Skinner, William M."' showing total 170 results
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170 results on '"Skinner, William M."'

1. Single-cell Motility Analysis of Tethered Human Spermatozoa.

Author

Skinner, William M, Mannowetz, Nadja, Lishko, Polina V, and Roan, Nadia R

Subjects
Amyloid fibrils, Flagellar beat frequency, High-speed imaging, Human spermatozoa, Seminal plasma, Single-cell motility analysis, Sperm Swim-up, Sperm flagellum, Sperm motility
Abstract

Vigorous sperm flagellar motility is essential for fertilization, and so the quantitative measurement of motility is a useful tool to assess the intrinsic fertility potential of sperm cells and explore how various factors can alter sperm's ability to reach the egg and penetrate its protective layers. Human sperm beat their flagella many times each second, and so recording and accurately quantifying this movement requires a high-speed camera. The aim of this protocol is to provide a detailed description of the tools required for quantitative beat frequency measurement of tethered human sperm at the single-cell level and to describe methods for investigating the effects of intracellular or extracellular factors on flagellar motion. This assay complements bulk measurements of sperm parameters using commercially-available systems for computer-assisted sperm analysis (CASA).

Published
2019

17. Examination of the proposition that Cu(II) can be required for charge neutrality in a sulfide lattice--Cu in tetrahedrites and sphalerite (1)

Author

Buckley, Alan N., Skinner, William M., Harmer, Sarah L., Pring, Allan, Lamb, Robert N., Fan, Liang-Jen, and Yang, Yaw-wen

Subjects
Copper -- Properties -- Influence -- Electric properties -- Research -- Chemical properties -- Methods, Electrical conductivity -- Research -- Chemical properties -- Methods -- Electric properties, X-ray spectroscopy -- Methods -- Research -- Electric properties -- Chemical properties, Sulfide minerals -- Chemical properties -- Electric properties -- Methods -- Research, Chemistry, Influence, Chemical properties, Research, Properties, Electric properties, Methods
Abstract

Abstract: Synchrotron XPS and Cu [L.sub.2,3]-edge NEXAFS spectroscopic data for a natural tetrahedrite surface prepared by fracture under UHV were in accord with the composition of the mineral and its [...]

Published
2007

23. Diaminotetrazine based mesoporous C3N6 with a well-ordered 3D cubic structure and its excellent photocatalytic performance for hydrogen evolution

Author

Talapaneni, Siddulu Naidu, primary, Mane, Gurudas P., additional, Park, Dae-Hwan, additional, Lakhi, Kripal S., additional, Ramadass, Kavitha, additional, Joseph, Stalin, additional, Skinner, William M., additional, Ravon, Ugo, additional, Al-Bahily, Khalid, additional, and Vinu, Ajayan, additional

Published
2017
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24. SWCNT photocathodes sensitised with InP/ZnS core–shell nanocrystals

Author

Macdonald, Thomas J., primary, Tune, Daniel D., additional, Dewi, Melissa R., additional, Bear, Joseph C., additional, McNaughter, Paul D., additional, Mayes, Andrew G., additional, Skinner, William M., additional, Parkin, Ivan P., additional, Shapter, Joseph G., additional, and Nann, Thomas, additional

Published
2016
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29. Diaminotetrazine based mesoporous C3N6 with a well-ordered 3D cubic structure and its excellent photocatalytic performance for hydrogen evolution.

Author

Talapaneni, Siddulu Naidu, Mane, Gurudas P., Park, Dae-Hwan, Lakhi, Kripal S., Ramadass, Kavitha, Joseph, Stalin, Skinner, William M., Ravon, Ugo, Al-Bahily, Khalid, and Vinu, Ajayan

Abstract

Novel nitrogen enriched diamino-s-tetrazine based highly ordered 3D mesoporous carbon nitride (MCN-9) hybrid materials with a body centered cubic Ia3d structure having high specific surface areas, large pore volumes, and tunable pore diameters were prepared by employing 3D body centered cubic KIT-6 mesoporous silica having a gyroidal porous structure and various pore diameters as the sacrificial hard template through a simple self-condensation followed by polymerization reaction of aminoguanidine hydrochloride inside the nanochannels of the KIT-6 template. Characterization results reveal that the prepared materials exhibit a 3D porous structure with well-defined mesopores and possess excellent physical parameters including high surface areas (157–346 m2 g−1), large pore volumes (0.36–0.63 cm3 g−1), different pore diameters (5.5–6.0 nm) and a high N/C ratio of 1.87, which is much higher than that of ideal C3N4 (1.33). The deep yellow colored MCN-9 with a 3D porous structure also shows good absorption properties with a tunable narrow bandgap of 2.25–2.5 eV, which is again much lower than that of C3N4 (2.7 eV) and helps to achieve much higher photocatalytic water splitting activity than non-porous C3N4 and other carbon nitrides under visible light irradiation. [ABSTRACT FROM AUTHOR]

Published
2017
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33. Interaction of cuprite with dialkyl dithiophosphates

Author

Buckley, A. N., Buckley, Alan N., Goh, Siew Wei, Skinner, William M., Woods, Ronald, Fan, Liang-Jen, Buckley, A. N., Buckley, Alan N., Goh, Siew Wei, Skinner, William M., Woods, Ronald, and Fan, Liang-Jen

Abstract

The interaction of freshly abraded surfaces of cuprite, Cu2O, with neutral or mildly alkaline aqueous solutions of diethyl or di-n-butyl dithiophosphate (DTP) has been investigated by means of conventional and synchrotron X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. It was confirmed that DTP adsorbs readily on Cu atoms in the surface layer of the mineral treated with solutions of the collector at pH values near 7 and 9 in the presence of air, and renders the surface hydrophobic. When cuprite is treated with relatively high concentrations of DTP for sufficiently long periods, collector can also be adsorbed as CuDTP, but the coverage does not exceed a thin layer of CuDTP on the adsorbed DTP monolayer, unlike the situation with Cu metal or chalcocite where a thick multilayer can be formed., Yes.

Published
2009

34. Rapid microwave assisted synthesis of nearly monodisperse aqueous CuInS2/ZnS nanocrystals.

Author

Mange, Yatin J., Dewi, Melissa R., Macdonald, Thomas J., Skinner, William M., and Nann, Thomas

Subjects
NANOCRYSTALS, SEMICONDUCTOR synthesis, CHEMICAL synthesis, MONODISPERSE colloids, ION exchange resins
Abstract

A rapid microwave-assisted synthesis for nearly monodisperse CuInS2/ZnS nanocrystals (NCs) has been developed. CuInS2/ZnS NCs have been prepared in water using thioglycolic acid as a stabilising ligand. The proposed synthesis results in stable and monodisperse NCs after only 5 minutes. In addition, the NCs were tested as potential sensitisers for photoanodes. [ABSTRACT FROM AUTHOR]

Published
2015
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46. CuInS2/ZnS nanocrystals as sensitisers for NiO photocathodes.

Author

Macdonald, Thomas J., Mange, Yatin J., Dewi, Melissa R., Islam, Husn U., Parkin, Ivan P., Skinner, William M., and Nann, Thomas

Abstract

Nickel oxide (NiO) is the most universally studied photocathode to date, however, its poor fill factor (FF) makes its efficiency much lower than its counterpart, n-type photoanodes. Its significance in photovoltaics is based on the potential to fabricate tandem photoelectrodes in order to enhance the overall efficiency of the existing devices. Furthermore, limited work on the sensitisation of NiO with semiconducting nanocrystals (NCs) exists. For the first time, we have fabricated NiO photocathodes sensitised with aqueous CuInS2/ZnS NCs. The NCs were chemically bound to the NiO films with the aid of carboxyl and thiol groups. This was achieved without modifying the bulk surface properties of NiO. Binding of the NCs was investigated using TEM, SEM, XPS, XANES, EXAFS modelling and ToF-SIMS. NiO films were assembled into CuInS2/ZnS NC sensitised photocathodes and their photovoltaic properties were compared to those of unsensitised and dye-sensitised NiO solar cells. We demonstrate that non-toxic NCs can be used to sensitise NiO photocathodes to achieve an (almost) all-inorganic system. [ABSTRACT FROM AUTHOR]

Published
2015
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