Search Results - "Newnham, David A."

Terahertz pulsed spectroscopy and imaging in the pharmaceutical setting - a review by Zeitler, J. Axel, Taday, Philip F., Newnham, David A., Pepper, Michael, Gordon, Keith C., Rades, Thomas

“…Terahertz pulsed spectroscopy (TPS) and terahertz pulsed imaging (TPI) are two novel techniques for the physical characterization of pharmaceutical drug…”
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Using terahertz pulsed spectroscopy to quantify pharmaceutical polymorphism and crystallinity by Strachan, Clare J, Taday, Philip F, Newnham, David A, Gordon, Keith C, Zeitler, J Axel, Pepper, Michael, Rades, Thomas

“…Terahertz pulsed spectroscopy (TPS) is a new technique that is capable of eliciting rich information when investigating pharmaceutical materials. In solids, it…”
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Characterization of temperature-induced phase transitions in five polymorphic forms of sulfathiazole by terahertz pulsed spectroscopy and differential scanning calorimetry by Zeitler, J Axel, Newnham, David A, Taday, Philip F, Threlfall, Terry L, Lancaster, Robert W, Berg, Rolf W, Strachan, Clare J, Pepper, Michael, Gordon, Keith C, Rades, Thomas

“…The far-infrared properties of all five known polymorphic forms of the drug sulfathiazole have been studied by terahertz pulsed spectroscopy and low-frequency…”
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Pulsed Terahertz Attenuated Total Reflection Spectroscopy by Newnham, David A., Taday, Philip F.

“…Pulsed terahertz attenuated total reflection (ATR) spectra of solid materials and liquids covering the 10 cm−1 to 120 cm−1 (0.3 THz to 3.6 THz) region of the…”
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Observations of nitric oxide in the Antarctic middle atmosphere during recurrent geomagnetic storms by Newnham, David A., Espy, Patrick J., Clilverd, Mark A., Rodger, Craig J., Seppälä, Annika, Maxfield, David J., Hartogh, Paul, Straub, Corinne, Holmén, Kim, Horne, Richard B.

“…We report ground‐based measurements of the polar middle atmosphere made using a 230–250 GHz passive microwave radiometer deployed at Troll station (72°01′S…”
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The Effect of Ozone Shadowing on the D Region Ionosphere During Sunrise by Macotela, Edith L., Clilverd, Mark A., Manninen, Jyrki, Thomson, Neil R., Newnham, David A., Raita, Tero

“…Diurnal very low frequency subionospheric radio wave phase measurements show a night‐to‐day transition pattern. During this sunrise transition a phase…”
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D‐Region High‐Latitude Forcing Factors by Macotela, Edith L., Clilverd, Mark, Manninen, Jyrki, Moffat‐Griffin, Tracy, Newnham, David A., Raita, Tero, Rodger, Craig J.

“…The subionospheric very low frequency (VLF) radio wave technique provides the possibility of investigating the response of the ionospheric D‐region to a…”
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Ground-based Ku-band microwave observations of ozone in the polar middle atmosphere by Newnham, David A, Clilverd, Mark A, Clark, William D. J, Kosch, Michael, Verronen, Pekka T, Rogers, Alan E. E

“…Ground-based observations of 11.072 GHz atmospheric ozone (O3) emission have been made using the Ny-Ålesund Ozone in the Mesosphere Instrument (NAOMI) at the…”
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Using terahertz pulsed spectroscopy to study crystallinity of pharmaceutical materials by Strachan, Clare J., Rades, Thomas, Newnham, David A., Gordon, Keith C., Pepper, Michael, Taday, Philip F.

“…The application of terahertz pulsed spectroscopy to polymorphic, liquid crystalline and amorphous forms of pharmaceutical compounds has been investigated. The…”
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Simulation study for ground-based Ku-band microwave observations of ozone and hydroxyl in the polar middle atmosphere by Newnham, David A, Clilverd, Mark A, Kosch, Michael, Seppala, Annika, Verronen, Pekka T

“…The Ku-band microwave frequencies (10.70–14.25 GHz) overlap emissions from ozone (O3) at 11.072 GHz and hydroxyl radical (OH) at 13.441 GHz. These important…”
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Direct observations of nitric oxide produced by energetic electron precipitation into the Antarctic middle atmosphere by Newnham, David A., Espy, Patrick J., Clilverd, Mark A., Rodger, Craig J., Seppälä, Annika, Maxfield, David J., Hartogh, Paul, Holmén, Kim, Horne, Richard B.

“…We report the first ground‐based passive microwave observations made from Troll station, Antarctica, which show enhanced mesospheric nitric oxide (NO) volume…”
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Delayed release tablet dissolution related to coating thickness by terahertz pulsed image mapping by Spencer, John A, Gao, Zongming, Moore, Terry, Buhse, Lucinda F, Taday, Philip F, Newnham, David A, Shen, Yaochun, Portieri, Alessia, Husain, Ajaz

“…Delayed release dosage forms such as Asacol employ coatings that are engineered to breakdown and release the drug topically at the nominal pH of the lower…”
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Simulation of submillimetre atmospheric spectra for characterising potential ground-based remote sensing observations by Turner, Emma C, Withington, Stafford, Newnham, David A, Wadhams, Peter, Jones, Anna E, Clancy, Robin

“…The submillimetre is an understudied region of the Earth's atmospheric electromagnetic spectrum. Prior technological gaps and relatively high opacity due to…”
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D-region ion–neutral coupled chemistry (Sodankylä Ion Chemistry, SIC) within the Whole Atmosphere Community Climate Model (WACCM 4) – WACCM-SIC and WACCM-rSIC by Kovács, Tamás, Plane, John M. C., Feng, Wuhu, Nagy, Tibor, Chipperfield, Martyn P., Verronen, Pekka T., Andersson, Monika E., Newnham, David A., Clilverd, Mark A., Marsh, Daniel R.

“…This study presents a new ion–neutral chemical model coupled into the Whole Atmosphere Community Climate Model (WACCM). The ionospheric D-region (altitudes ∼…”
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Simulation study for measurement of horizontal wind profiles in the polar stratosphere and mesosphere using ground-based observations of ozone and carbon monoxide lines in the 230–250 GHz region by Newnham, David A., Ford, George P., Moffat-Griffin, Tracy, Pumphrey, Hugh C.

“…Meteorological and atmospheric models are being extended up to 80 km altitude but there are very few observing techniques that can measure…”
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Laboratory measurements of water vapour continuum absorption in spectral region 5000-5600/cm: Evidence for water dimers by Ptashnik, Igor V, Smith, Kevin M, Shine, Keith P, Newnham, David A

“…In spite of decades of extensive studies, the role of water dimers (WD) in the atmospheric radiation budget is still controversial. In order to search for…”
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Temperature dependent terahertz pulsed spectroscopy of carbamazepine by Zeitler, J. Axel, Newnham, David A., Taday, Philip F., Strachan, Clare J., Pepper, Michael, Gordon, Keith C., Rades, Thomas

“…In this study for the first time temperature dependent terahertz pulsed spectroscopy was performed on a pharmaceutical drug. The polymorphic conversion process…”
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New studies of the visible and near-infrared absorption by water vapour and some problems with the HITRAN database by Belmiloud, Djedjiga, Schermaul, Roland, Smith, Kevin M., Zobov, Nikolai F., Brault, James W., Learner, Richard C. M., Newnham, David A., Tennyson, Jonathan

“…New laboratory measurements and theoretical calculations of integrated line intensities for water vapour bands in the near‐infrared and visible (8500–15800…”
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Laboratory measurements of water vapour continuum absorption in spectral region 5000–5600 cm−1: Evidence for water dimers by Ptashnik, Igor V., Smith, Kevin M., Shine, Keith P., Newnham, David A.

“…In spite of decades of extensive studies, the role of water dimers (WD) in the atmospheric radiation budget is still controversial. In order to search for…”
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Effects of improvements in near-infrared water vapour line intensities on short-wave atmospheric absorption by Chagas, Júlio C. S., Newnham, David A., Smith, Kevin M., Shine, Keith P.

“…The impact of updates of spectroscopic data on the short‐wave absorption by atmospheric water vapour is examined and compared to line parameters from the 1996…”
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