Prevalence and severity of pterygium in Somalian male population: Can Khat consumption have a synergistic effect with ultraviolet radiation?

Exposure of ultraviolet-irradiated, adenine-dependent haploid yeast to 2,6-diamino purine (an analogue of adenine) consistently gives rise to approximately 0.5% recessive biochemical mutants. This frequency is 22-fold higher than that obtained with either agent alone, and 150-fold higher than the spontaneous frequency. The distribution of mutants into nine discrete nutritional groups attests to the utility of the method for procuring relatively large numbers of different biochemical mutants. Several new gene markers for amino acid requirements are described, including one which controls an apparent single block for both lysine synthesis and respiratory competence.

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Synergistic effect of ultraviolet radiation and high hydrostatic pressure on texture, color, and oxidative stability of refrigerated tilapia fillets

Journal of the Science of Food and Agriculture ◽

10.1002/jsfa.9685 ◽

2019 ◽

Vol 99 (9) ◽

pp. 4474-4481 ◽

Cited By ~ 5

Author(s):

Maria LG Monteiro ◽

Eliane T Mársico ◽

Amauri Rosenthal ◽

Carlos A Conte‐Junior

Keyword(s):

Hydrostatic Pressure ◽

Synergistic Effect ◽

Ultraviolet Radiation ◽

Oxidative Stability ◽

High Hydrostatic Pressure ◽

Tilapia Fillets

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Synergistic effect of hyperthermal atomic oxygen beam and vacuum ultraviolet radiation exposures on the mechanical degradation of high-modulus aramid fibers

Polymer ◽

10.1016/j.polymer.2006.07.029 ◽

2006 ◽

Vol 47 (19) ◽

pp. 6836-6842 ◽

Cited By ~ 25

Author(s):

Lipika Ghosh ◽

Mohammad Harris Fadhilah ◽

Hiroshi Kinoshita ◽

Nobuo Ohmae

Keyword(s):

Synergistic Effect ◽

Ultraviolet Radiation ◽

Atomic Oxygen ◽

Vacuum Ultraviolet ◽

Mechanical Degradation ◽

High Modulus ◽

Aramid Fibers ◽

Vacuum Ultraviolet Radiation

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Applications of Photoelectron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100092499 ◽

1976 ◽

Vol 34 ◽

pp. 506-507

Author(s):

William J. Baxter

Keyword(s):

Electron Microscopy ◽

Thermal Decomposition ◽

Chemical Composition ◽

Ultraviolet Radiation ◽

Thin Layer ◽

Edge Effects ◽

Electron Optics ◽

Surface Layers ◽

Crystalline Orientation ◽

Fluorescent Screen

In this form of electron microscopy, photoelectrons emitted from a metal by ultraviolet radiation are accelerated and imaged onto a fluorescent screen by conventional electron optics. image contrast is determined by spatial variations in the intensity of the photoemission. The dominant source of contrast is due to changes in the photoelectric work function, between surfaces of different crystalline orientation, or different chemical composition. Topographical variations produce a relatively weak contrast due to shadowing and edge effects.Since the photoelectrons originate from the surface layers (e.g. ∼5-10 nm for metals), photoelectron microscopy is surface sensitive. Thus to see the microstructure of a metal the thin layer (∼3 nm) of surface oxide must be removed, either by ion bombardment or by thermal decomposition in the vacuum of the microscope.

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