Results 21 to 30 of about 47,074 (301)

The high-field polar RX J1007.5-2017 [PDF]

, 2012
We report optical and X-ray observations of the high-field polar RXJ1007.5-2017 performed between 1990 and 2012. It has an orbital period of 208.60 min determined from the ellipsoidal modulation of the secondary star in an extended low state.
Beuermann, K., Burwitz, V., Reinsch, K., Schwope, A. D., Thomas, H. -C.   +4 more
core   +2 more sources

Dissolution test for glibenclamide tablets

Química Nova, 2007
The aim of this work is to develop and validate a dissolution test for glibenclamide tablets. Optimal conditions to carry out the dissolution test are 500 mL of phosphate buffer at pH 8.0, paddles at 75 rpm stirring speed, time test set to 60 min and ...
Elisabeth Aparecida dos Santos Gianotto, Renata Pires Arantes, Maurilio José Lara-Filho, Alexandre Cezar Saraiva Casimiro Filho, Marlene Maria Fregonezi-Nery   +4 more
doaj   +1 more source

Convection, Thermal Bifurcation, and the Colors of A stars [PDF]

, 1997
Broad-band ultraviolet photometry from the TD-1 satellite and low dispersion spectra from the short wavelength camera of IUE have been used to investigate a long-standing proposal of Bohm-Vitense that the normal main sequence A- and early-F stars may ...
Balona L. A., Berthet S., Boggess A., Bohlin R. C., Bohlin R. C., Bohm-Vitense E., Bohm-Vitense E., Bohm-Vitense E., Bohm-Vitense E., Cayrel R., Coupry M. F., Dravins D., Edvardsson B., Garhart M. P., Garhart M. P., Garhart M. P., Hauck B., Hilditch R. W., Kjeldsen H., Lane M. C., Lemke M., Lopez de Coca P., Malaise F., Mantegazza L., Monier R., Moon T. T., Napiwotzki R., Nichols J. S., Nordlund, Oliversen N., Saxner M., Simon T., Smalley B., Smalley B., Smalley B., Theodore Simon, Veer-Menneret C., Veer-Menneret C., Wayne B. Landsman   +38 more
core   +4 more sources

Green Synthesis of Highly Luminescent Carbon Quantum Dots from Lemon Juice

Journal of Nanotechnology, 2019
Highly luminescent carbon dots (C-dots) were synthesized by the one-pot simple hydrothermal method directly from lemon juice using different temperatures, time, aging of precursors, and diluted solvents to control the luminescence of C‐dots. The obtained
Bui Thi Hoan, Phuong Dinh Tam, Vuong-Hung Pham   +2 more
doaj   +1 more source

PENETAPAN KADAR ASAM BENZOAT DALAM BEBERAPA MERK DAGANG MINUMAN RINGAN SECARA SPEKTROFOTOMETRI ULTRAVIOLET

Pharmaciana, 2012
Benzoic acid is one of the synthetic preservatives, work effectively at pH 2.5 to 4.0, therefore it is widely used in acidic food or drink. This study aims to determine benzoic acid content in some soft drink products, their conformity with Permenkes ...
Wahyu Irna Wati, Any Guntarti
doaj   +1 more source

Quantitative ultraviolet measurements on wetted thin-layer chromatography plates using a charge-coupled device camera [PDF]

, 2008
This paper presents the first study of the UV imaging of spots on thin-layer chromatographic plates whilst still wet with solvent. Imaging of spots of benzophenone during and after development was carried out using a charge-coupled device camera.
Bergstrom, E.T., Goodall, D.M., Lancaster, M., McCrossen, S., Myers, P.   +4 more
core   +1 more source

Interpreting Flux from Broadband Photometry [PDF]

, 2016
We discuss the transformation of observed photometry into flux for the creation of spectral energy distributions and the computation of bolometric luminosities.
Breeveld, Alice, Brown, Peter J., Roming, Peter W. A., Siegel, Michael   +3 more
core   +4 more sources

M4-18: The planetary nebula and its WC10 central star [PDF]

, 1999
We present a detailed analysis of the planetary nebula M4-18 (G146.7+07.6) and its WC10-type Wolf-Rayet central star, based on high quality optical spectroscopy (WHT/UES, INT/IDS, WIYN/DensPak) and imaging (HST/WFPC2).
Crowther, Paul A., De Marco, Orsola
core   +3 more sources

High Entropy Wide‐Bandgap Borates with Broadband Luminescence and Large Nonlinear Optical properties

Advanced Functional Materials, EarlyView.
High‐entropy rare‐earth borates exhibit excellent nonlinear optical and broadband luminescence properties arising from multi‐component doping, chemical disorder, increased configurational entropy, and increased lattice and electronic anharmonicity. This formulation enabled us to obtain a large, environmentally stable single crystal with 3X higher laser‐
Saugata Sarker, Yu Wang, Yongwen Sun, Caeli Benyacko, Saeed S.I. Almishal, Tao Zhou, Zhiyu Zhang, Jadupati Nag, Himirkanti Sarkar, Jeffrey Shallenberger, Hemant Yennawar, Yang Yang, Jon‐Paul Maria, Zhiqiang Mao, Venkatraman Gopalan   +14 more
wiley   +1 more source

Synthesis of silver nanoparticles using plant extracts from Erythrina abyssinica aerial parts and assessment of their anti-bacterial and anti-oxidant activities

Results in Chemistry, 2022
In the present study, silver nanoparticles were synthesized using Erythrina abyssinica aerial parts as both reducing and capping agents. Three extracts were obtained from the plant using methanol, acetone and water.
Netai Mukaratirwa-Muchanyereyi, Cecilia Gusha, Munyaradzi Mujuru, Upenyu Guyo, Stephen Nyoni   +4 more
doaj   +1 more source