Ultraviolet Rays

"That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter

Abstracts

- (-)-Epicatechin-3-gallate, a green tea polyphenol is a potent agent against UVB-induced damage in HaCaT keratinocytes. (-)-Epicatechin-3-gallate (ECG) is a polyphenolic compound similar to (-)-epigallocatechin-3-gallate (EGCG) which is abundant in green tea. Numerous workers...

- 10Sa RNA is associated with 70S ribosome particles in Escherichia coli. The intracellular distribution of 10Sa RNA in Escherichia coli was investigated in cell extracts. Northern hybridization revealed that a large fraction of...

- 3-Mercaptopropanol as a traceless linker for chemical and enzymatic synthesis of oligosaccharides. The reducing end of protected carbohydrates can be equipped with a series of aglycones via the photochemical installation of a 3-mercaptoethanol linker. This...

- 4-Carboxymethoxy-5,7-dinitroindolinyl-Glu: an improved caged glutamate for expeditious ultraviolet and two-photon photolysis in brain slices.

- 4-Nitroquinoline-1-oxide-induced mutagen sensitivity and risk of nonmelanoma skin cancer: a case-control analysis. The UV radiation-mimetic chemical 4-nitroquinoline-1-oxide (4-NQO) is thought to induce squamous cell carcinoma (SCC) similar to those induced by UV...

- 5-Methyltetrahydrofolate inhibits photosensitization reactions and strand breaks in DNA. The known functions of folate are to support one-carbon metabolism and to serve as photoreceptors for cryptochromes and photolyases. We demonstrate that...

- A change in circular dichroism due to the binding of guanosine-3-phosphate to ribonuclease T1.

- A comparative study of corneal incisions induced by diamond and steel knives and two ultraviolet radiations from an excimer laser. This paper reviews the potential role of excimer lasers in corneal surgery. The morphology of incisions induced by two wavelengths of excimer laser...

- A comparison of the dose-response relationship for psoralen-UVA erythema and UVB erythema. Twenty patients with psoriasis were phototested to determine their erythemal responses to UVB and psoralen-UVA (PUVA) (oral 8-methoxypsoralen). The smallest...

- A convenient procedure for the preparation of small quantities of 14C-thiamine diphosphate.

- A field guide to instrumentation.

- A histochemical analysis of adrenal lipids in ox and sheep.

- A LOV story: the signaling state of the phot1 LOV2 photocycle involves chromophore-triggered protein structure relaxation, as probed by far-UV time-resolved optical rotatory dispersion spectroscopy. Light-, oxygen-, or voltage-regulated (LOV1 and LOV2) domains bind flavin mononucleotide (FMN) and activate the phototropism photoreceptors phototropin 1...

- A method for the detection of strand breaks in DNA samples.

- A new method to test the effectiveness of sunscreen ingredients in a novel nano-surface skin cell mimic. Photophysical properties of sunscreens are commonly studied in solvent media, which do not mimic the skin, or in complex artificial skin systems, which are...

- A new plasma-based method to promote cell adhesion on micrometric tracks on polystyrene substrates. A new procedure has been developed in order to obtain heterogeneous polymer surfaces for the promotion of cell adhesion. For this purpose, a microelectronic...

- A novel antioxidant 3-O-Caffeoyl-1-methylquinic acid enhances ultraviolet A-mediated apoptosis in immortalized HaCaT keratinocytes via Sp1-dependent transcriptional activation of p21(WAF1/Cip1). It has become clear that ultraviolet A (UVA) radiation from the solar spectrum is a major environmental challenge to the skin. This necessitates developing...

- A novel composition of phosvitins from salmon and trout roe.

- A PNA4 quadruplex. A tetrameric PNA, TGGG, has been shown to form an intermolecular G-quadruplex. Nanoelectrospray mass spectrometry, combined with solution-phase H/D exchange,...

- A protein factor regulating the state of aggregation of myosin. I. Properties of the factor.

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