In situ time-series measurements of spectral diffuse downwelling irradiance from the Bermuda Testbed Mooring are presented. Averaged diffuse attenuation coefficients of downwelling irradiance, Kd,and their elastic and inelastic components are investigated at seven wavelengths. At shorter wavelengths (<510 nm), Kd is weakly dependent on the solar zenith angle owing to the prevailing scattering e...

We present a $0.8-2.5\,\mu$m spectrum of the Very Late Thermal Pulse object V4334 Sgr (Sakurai's Object), obtained in 2020 September. The displays continuum that rises strongly to longer wavelengths, and is considerably brighter than most recent published seven years earlier. At wavelengths well fitted by blackbody with temperature $624\pm8$ K. However, there excess at shortest we interpret as ...

N,N-Diethyl meta Toluamide (DEET) is an insect repellent agent that contrary to its benefits,if is used in formulations with high skin permeation, will produce side effects of differentseverity. This study attempted to achieve a semi-solid DEET containing formulation withgood appearance, sufficient spreadity, suitable viscosity for tube and jar filling, compatible pHwith skin, reasonable stabil...

This publication uses a colorimetric method based on the absorbance spectra of dye solutions to improve on Beer’s law when calculating the dye concentrations of a three-component mixture. The performance of the new method is compared with that of Beer’s law evaluated at three wavelengths, and Beer’s law evaluated at 16 wavelengths. Colorimetric method gives the best prediction of d...

Silver particles of nanometric size were prepared from silver sulphate solution using Curcuma Longa and Zingiber Officinale rhizome extracts. The reaction was completed at 3 hours on using Curcuma Longa rhizome extract as reducing agent, making it one of the fastest biosynthesis route reported so far. The plasmon bands at 420 nm in the UV visible spectra are broad with an absorption tail in the...

We produce harmonics in the molecule ethylene ðC2H4Þ with two different wavelengths and three pulse durations. Due to the low ionization potential ðIp 1⁄4 10:5 eVÞ of C2H4, longer wavelengths are needed to extend the maximum photon energy produced. Our results show that regardless of the strong dependence of the efficiency of the harmonic generation process with wavelength, at 1820 nm the cutof...

We study high-order harmonic generation in C60 molecules interacting with a linearly polarized intense short laser pulse at nearand mid-infrared wavelengths, using an extension of the so-called three-step or Lewenstein model to the molecular case. The results exhibit modulations in the plateaus of the spectra at the longer wavelengths, which are present for ensembles of aligned as well as rando...

We observed Sgr A* using the Very Large Array (VLA) and the Giant Metrewave Radio Telescope (GMRT) at multiple cm and mm wavelengths on 17 June 2003. The measured flux densities of Sgr A*, together with those obtained from the Submillimeter Array (SMA) and the Keck II 10 m telescope on the same date, are used to construct a simultaneous spectrum of Sgr A* from 90 cm to 3.8 μm. The simultaneous ...