An operationally simple colorimetric way for measuring hyaluronidase activity was developed using cysteamine-bound gold nanoparticles. The addition of gold nanoparticles into hyaluronidase-containing solutions resulted in color changes, which could easily be observed with the naked eye or a UV/Vis spectrophotometer.

A Simple, rapid and economical procedure for estimation of piperine by UV Spectrophotometer in different piper species was developed and is described. The method is based on method is based on the identification of piperine by TLC and on the ultra violet absorbance maxima in alcohol at 328 nm.

Activated carbon (AC) has been prepared from raw coconut pith and coconut pith impregnated with H3PO4 and NaOH solutions separately. AC was characterized with SEM, particle size analyzer and proximate analyzer. Adsorption studies were carried out using UV and atomic absorption spectrophotometer to find its effectiveness. AC obtained from coconut pith treated with phosphoric acid was found compa...

A simple, rapid and economical procedure for estimation of Embelin by UV Spectrophotometer in Embelia ribes was developed and is described. The method is based on the identification of Embelin by TLC and on the ultra violet absorbance maxima in chloroform at 285 nm. A value of 4.80% w/w of Embelia was found in test simple.

The VOx/LUS-1 nanoporous silica synthesis and characterized by XRD, Nitrogen adsorption–desorption isotherms and UV-visible spectrophotometer. Direct oxidation of benzene to phenol in liquid phase by H2O2 peroxide were examined by using various (methanol, acetone, acetic acid, acetonitryl) solvents.

The effect of light scattering on measurement of UV absorbance and penetration of germicidal UVC irradiance in a UV reactor were studied. Using a standard spectrophotometer, absorbance measurements exhibited significant error when particles that scatter light were present but could be corrected by integrating sphere spectroscopy. Particles from water treatment plants and wastewater effluents ex...

Abstract The most medically representative plant in the Apocynaceae family is Vinca minor . a perennial, herbaceous plant, commonly known as Saschiu. In present research we aimed to isolate indole compounds from L. and carry out some physico-chemical studies on these compounds: UV-VIS spectroscopy determination of polyphenols content using Folin-Ciocâlteu method. spectrophotometric study alcoho...

Typically, the first thing one wants to know about a DNA preparation is its concentration and purity. Both can be determined by measuring the absorption of ultraviolet light. DNA absorbs UV more or less strongly depending upon the wavelength. We will be using a NanoDrop spectrophotometer, which takes measurements at wavelengths of 260 and 280 nm, and in addition determines an absorption spectru...

Natural light is a transverse electromagnetic wave with electric (E) and magnetic (H) fields perpendicular to each other (Fig. 1). The two fields are also perpendicular to the wave’s direction of travel (k). In unpolarized light the electric field vectors vibrate in all directions of the EH plane equally (Fig.2). Note that all the electric field vectors are of the same length. When the Polarize...

ZnS nanoparticles of different size have been synthesized using a colloidal particles method. ZnS nanoparticles prepared with capping agent (mercaptoethanol) then were characterized using X-ray diffraction (XRD) and UV-Vis spectroscopy. The particle size of the nanoparticles calculated from the XRD patterns has been found in the range 1.85-2.44nm. Absorption spectra have been obtained using UV-...