ULTRA-VIOLET rays are stated to have a general tonic effect on the sympathetic, and it has been denlonstrated that a general irradiation produces an increase of the calcium and phosphorus ions in the blood. Growing rats subjected to daily irradiation by the mercury-vapour lamp increase in weight, and their total calcium content goes up considerably in excess of the controls. It would appear tha...

The microscopic and macroscopic characters of the leaves, physical constant values, behavior on treatment with different chemical reagents, fluorescence characters under ultra violet light after treatment with different chemical reagents of the powdered leaves of Azadirachta indica A. Juss (Family-Meliaceae) were studies to fix some pharmacognostical parameters.

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 spectrophotometric analysis of biomolecules for sample quantification and purity assessment has been well documented. Quantification is made possible by the absorption of ultra-violet light by chromophores contained in nucleic acids and protein. Consistent with these methods is the use of the Beer-Lambert Law that relates physical property of light absorption by molecules to concentration w...

Protection against ultra violet radiation-induced DNA-damage in the skin is not only provided by the pigmentary system. The epidermal barrier consisting of stratum corneum keratinocytes, filaggrin and other proteins is an additional component of the UV-shield. Disruption of the epidermal barrier through frequent body cleansing with soaps and cosmetics may increase the risk of non-melanoma skin ...

The macroscopic character of the roots physical constant values, extractive values, behaviour on treatment with different chemical reagents, fluorescence characters under ultra violet light after treatment with different chemical reagents of the powdered roots of Asparagus racemosus Willd, (Fam. Liliaceae) were studied to fix some pharmacognostical parameters.

Amylase in solution is inactivated by the radiations from a mercury arc in quartz, in a manner similar to that previously reported for pepsin. The reaction was followed to a point where more than 88 per cent change had taken place, the course being that of mono-molecular radiochemical change. Apparently, this reaction is due to the influence of ultra-violet radiation alone.

A new fully automatic method for detecting auroral ovals in images produced by the NASA IMAGE satellite’s Far Ultra Violet (FUV) sensor is introduced. The method exploits the shape characteristics of the auroral oval and utilizes domain knowledge. The shape exploitation involves an efficient Hough-based process. Experimental results show that the new method can accurately detect the auroral ova...

In this letter we investigate the ultra-violet behaviour of four-point one-loop gluon amplitudes in dimensions greater than four coupled to various particles types. We discuss the structure of the counterterms and their inherent symmetries. 1Research supported by PPARC

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.