نتایج جستجو برای: photosensitivity
تعداد نتایج: 2178 فیلتر نتایج به سال:
Systemic Lupus Erythematosus (SLE) is an autoimmune disease with a very varied spectrum of clinical manifestations that could be partly determined by genetic factors. We aimed to determine the relationship between prevalence of 11 clinical features and age of disease onset with European population genetic substructure. Data from 1413 patients of European ancestry recruited in nine countries was...
Photosensitivity is a characteristic feature of some inflammatory skin diseases, including cutaneous lupus erythematosus (CLE) and dermatomyositis (DM). Among the various hypotheses that explain this phenomenon, an aberrant sensitivity keratinocytes (KC) deserves more attention, especially in case UVB photosensitivity, as epidermis almost entirely absorbs UVB. However, underlying mechanisms UVB...
Nanowire networks of zinc octaethylporphyrin (ZnOEP) were printed using an aerosol-jet printer on a poly(ethylene terephthalate) (PET) flexible substrate. The prototype photodetector based on the as-printed network exhibited high photosensitivity, fast photoresponse, and excellent mechanical stability.
PURPOSE Photosensitivity, or photoparoxysmal response (PPR), is an abnormal EEG reaction to intermittent photic stimulation (IPS), consisting of spikes, spike-waves, and intermittent slow waves. Depending on the spread of the abnormal activity, PPR subgroups have been defined as having either propagating PPR or localized, occipital spikes (OS) only. Recent research suggests an enhanced excitabi...
Sunlight has important biological effects in human skin. Ultraviolet (UV) light striking the epidermis catalyzes the synthesis of Vitamin D and triggers melanin production. Although a causative element in skin cancers, sunlight is also associated with positive health outcomes including reduced incidences of autoimmune diseases and cancers. The mechanisms, however, by which light affects immune ...
Permanent gratings (refractive index modulation ~3x10 ) were written in tin-doped silica -4 optical fibres with low levels of SnO (~0.15 mol %). In Ge-doped silica, ~10 mol% GeO is 2 2 required to produce comparable photorefractivity under similar conditions. Photosensitivity in tin-doped silica optical fibres G. Brambilla, V. Pruneri, L. Reekie Optoelectronics Research Centre, Southampton Univ...
Photoonycholysis in association with a generalized phototoxic reaction or as an isolated event is a well-recognized complication of the tetracycline group of antibiotics. We describe a 14-year-old white girl with cystic fibrosis who developed photoonycholysis of all 20 nails while receiving treatment with doxycycline. Pediatricians who prescribe tetracyclines should be aware of this potential c...
Intermittent Photic Stimulation (IPS) is a well recognized provocation maneuver during EEG recording which helps in identifying underlying photosensitivity. The frequency and characteristics of various responses to photosensitivity among our adult patients was determine. EEGs of subjects > or =15 years from 2003-2006, were reviewed. Two main photosensitive responses were observed: Photoparoxysm...
Clinical and paraclinical data (visual stress tests, electroencephalographic and cerebrovascular photic driving, visual evoked potentials) demonstrate that the concept of photosensitive headache is fully justified. The interictal hallmark of photosensitive cephalalgic patients is potentiation (or sensitization) instead of habituation. The aetiopathogenic mechanisms of photosensitive headache as...
Hereditary porphyrias are a group of eight metabolic disorders of the haem biosynthesis pathway that are characterised by acute neurovisceral symptoms, skin lesions, or both. Every porphyria is caused by abnormal function of a separate enzymatic step, resulting in a specific accumulation of haem precursors. Seven porphyrias are the result of a partial enzyme deficiency, and a gain of function m...
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