Long series of ozone profiles from 6 to 28 km at the Southern Tropics have been obtained from solar occultation measurements at twilight using a SAOZ spectrometer borne by long duration balloons. Two flights have been performed from Bauru in Brazil both in the summer, in February and March 2001 and 2003, from where the balloons 5 are moving westward at almost constant latitude (20 • ±5 • S). Th...

Previously, an in vitro study of the SPF value a cream formulation with active ingredients from broiler eggshells was conducted using UV-vis spectrophotometry at wavelength 290-320 nm and obtained 8.335 concentration 9000 ppm. This aims to continue testing UV protective activity vivo on creams these combination adding 5% titanium dioxide. The experimental animals used consisted 12 female rabbit...

One of the ways to prevent generative diseases is by using natural antioxidant compounds. The flavonoid compounds in flower parts M. gigantea have a role antioxidants. Thus study aimed test activity and levels flowers. was carried out UV-vis spectrophotometry 2,2-diphenyl-1-picrylhydrazyl assay 10% aluminum chloride potassium acetate, both tests quercetin as comparison. results this obtained IC...

A detailed mechanistic investigation of the early stages of the Paternò-Büchi reaction following 267 nm excitation of benzaldehyde in cyclohexene has been completed using ultrafast, broadband transient UV-visible and IR absorption spectroscopies. Absorption due to electronically excited triplet state benzaldehyde decays on a 80 ps time scale via reaction with cyclohexene. The growth and subsequ...

A potential bacterial strain GSM2, capable of degrading an azo dye Reactive Violet 5 as a sole source of carbon, was isolated from textile mill effluent from Solapur, India. The 16S rDNA sequence and phenotypic characteristics indicated an isolated organism as Paracoccus sp. GSM2. This strain exhibited complete decolorization of Reactive Violet 5 (100 mg/L) within 16 h, while maximally it could...

The speciation of Tc(vii) was studied in 12 M H(2)SO(4) by NMR, UV-visible and XAFS spectroscopy. Experimental results and density functional calculations show the formation of TcO(3)(OH)(H(2)O)(2).

Versatile, iterative synthetic protocols to form expanded [n]radialenes have been developed (n=3 and 4), which allow for a variety of groups to be placed around the periphery of the macrocyclic framework. The successful use of the Sonogashira cross-coupling reaction to complete the final ring closure demonstrates the ability of this reaction to tolerate significant ring strain while producing m...

We propose a paradigm for macroscopic control of high-order harmonic generation by modulating the bound-state population of the medium atoms. A unique result of this scheme is that apart from regular spatial quasi-phase-matching (QPM), also purely temporal QPM of the emitted radiation can be established. Our simulations demonstrate temporal QPM by inducing homogenous Rabi oscillations in the me...

published for the determination of lactate using liquid chromatography. One method (1) involves reverse-phase separation with a phosphate buffer at pH 3 as the mobile phase. Following the separation, the lactate is converted to hydrogen peroxide by a lactate oxidase IMER and then detected amperometrically. The optimal pH for the enzyme lactate oxidase is around 7, and at pH 3 the enzyme is basi...

We have developed a real time ultraviolet (UV) imaging system that can visualize both invisible UV light and a visible (VIS) background scene in an outdoor environment. As a UV/VIS image sensor, an organic photoconductive film (OPF) imager is employed. The OPF has an intrinsically higher sensitivity in the UV wavelength region than those of conventional consumer Complementary Metal Oxide Semico...