Particle-size distribution and the concentration of polystyrene particles suspended in water were accurately recovered from the inversion of spectral extinction data measured with a commercial spectrophotometer. The instrument was modified by placing a spatial filter in the collection optics to prevent low-angle scattered light from affecting the measurement of transmitted power. The data were ...

We succeeded to develop a reference light source in the range of very low luminance using a double integrating sphere system, and calibrated a commercial spectrophotometer below 1 × 10−5 cd/m2 levels, which is 1/100 lower than the specified limit for measurement. And we improved measurements in the ultra low luminance range of displays using the calibrated commercial spectrophotometer and a dar...

The EPR and UV-VIS spectroscopy was used to determine the pH effect on bovine liver catalase. The measurements were made in the pH range from 2 to 10. The positions, shapes and relative intensities of the UVVIS peaks were observed. Spin labelling technique was used to monitor the molecular dynamics of catalase. Treatment with acid or alkaline solutions causes spectral changes which may be due t...

due to the binding of the –coo- group with the mercury (ii), gold nanoparticlesfunctionalized with glutathione can self-assemble to form a supermolecular network in the hac-naac buffer solution. the aggregation of functionalized gold nanoparticles and mercury (ii)caused the shift of maximum absorption peak of the uv-vis spectrum from 520 nm to 609 nm.based on this principle, a simple spectropho...

statement of the problem generally, the main source of fluoride intake is drinking water. excessive consumption of bottled water as a substitute or in addition to the tap water supply may have implications for safe fluoride supplementation. in this study, fluoride contents in six commercial brands of bottled water were measured materials and methods six different brands of bottled drinking wate...

Terdapat beberapa aktifitas biologis dalam daun jarak pagar antara lain sebagai
 antidiabetes dan antihipertensi. Flavonoid adalah senyawa metabolit sekunder yang
 bertanggung jawab terhadap tersebut. Penelitian ini bertujuan untuk
 menghitung kandungan total flavonoid ekstrak pagar, serta
 mengidentifikasi alkaloid, terpenoid, saponin, flavonoid, tanin terdapat pada pagar. ...

Three fluorescent asymmetric bis-urea receptors (L1-L3) have been synthesised. The binding properties of L1-L3 towards different anions (fluoride, acetate, hydrogencarbonate, dihydrogen phosphate, and hydrogen pyrophosphate HPpi3-) have been studied by means of 1H-NMR, UVVis and fluorescence spectroscopies, single crystal X-ray diffraction, and theoretical calculations. In particular, a remarka...

The objectives of this study were to characterize a synthesis brom-isoflavanone (notated IF) with possible pharmacological activities, water insoluble and to examine the potential of beta-cyclodextrin to improve this property and obtain inclusion compounds that were analysed by different techniques: UV-Vis, IR, 1HNMR spectroscopy, thermal analysis. The presence of β-cyclodextrin rises the conte...

Background: The Clementine mission provided the first high resolution mul-tispectral image data set of the far side of the Moon. While near side surface morphological units have been studied extensively from earth based spectral measurements, this is the first opportunity to examine the compositional properties of far side areas. Moscoviense is one of the prominent large impact basins on the lu...

ASSESSING THE ABSOLUTE POSITIONAL ACCURACY OF THE CLEMENTINE UVVIS MOSAIC. A. C. Cook, B. Semenov , M.S. Robinson and, T.R. Watters, School of Computer Science and Information Technology, University of Nottingham, Jubilee Campus, Wollaton Road, Nottingham, NG8 1BB, UK (E-mail: [email protected]); Mail Stop 301-125L, Jet Propulsion Laboratory, Pasadena, CA 91109-8099, USA (E-mail: boris.semenov@...