We tested the hypothesis that ultraviolet photoreception contributes to prey search in small juvenile rainbow trout (Oncorhynchus mykiss) and pumpkinseed sunfish (Lepomis gibbosus) while foraging on Daphnia pulex. Small individuals of these species are ultraviolet-photosensitive zooplanktivores. For both species, prey pursuit distances and angles were larger under full-spectrum illumination tha...

a user-friendly and inexpensive ionic liquid-based single-drop microextraction (il-sdme) method was developed to preconcentrate trace amounts of aminophenol isomers (aps) from human urine, hair dye and water samples prior to analysis by high performance liquid chromatography-ultraviolet spectrophotometry detection (hplc-uv). under optimum conditions (i.e., 3.5 µl of 1-hexyl-3-methylimidazolium ...

Ultraviolet is an important component of the photic environment. It is used by a wide variety of animals and plants in mutualistic communication, especially in insect and flower inter-relationships. Ultraviolet reflections and sensitivity are also becoming well considered in the relationships between vertebrates and their environment. The relative importance of ultraviolet vis à vis other prima...

Mutants of Candida albicans resistant to aculeacin A, a yeast cell-wall inhibitor, were isolated after mutagenesis with ultraviolet light. The parental strain was sensitive to 0.1 approximately 0.5 microgram/ml of the antibiotic. In contrast, the minimum inhibitory concentration for the mutants ranged from 50 to 200 microgram/ml. Except for papulocandin, another cell-wall inhibitor, the antibio...

Evaluation of the detection capabilities of both laser and ultraviolet light sources was performed. The Spectra-Physics Model 171-19 argon ion laser was used in a comparison with the hand held Mineralight multiband ultraviolet lamp, Model UVSL-58 and the Fotodyne Foto UV 410, Model 3-4100. Both techniques were evaluated as to their detection limits for various biological stains. A serial diluti...

Far-ultraviolet detection of a new chemical species on the icy surface Rhea.

We report the detection of fully resolved absorption lines of A−X bands from interstellar CO and CO, through high-resolution spectroscopy of X Per with the Space Telescope Imaging Spectrograph. The first ultraviolet measurement of an interstellar CO column density shows that its isotopomeric ratio is CO/CO = 8700 ± 3600. Simultaneously, the second ultraviolet detection of interstellar CO establ...

the use of accelerated temperature stability studies using the arrhenius relationship is routine for estimating the stability of a drug at room temperature. therefore, the acceleration method is used to determine the expiration date of dexamethasone aqueous formulation manufactured in iran. a high-performance liquid chromatography (hplc) method utilizing ultraviolet (uv) detection for dexametha...