Chapter 057 Photosensitivity and Other Reactions to Light (Part 2) pps

... the Soret band, around 400 nm (short visible), and to a lesser extent in the Chapter 057. Photosensitivity and Other Reactions to Light (Part 2) Molecular Targets for UVR-Induced Skin Effects ... factor, prostaglandin E 2 , and tumor necrosis factor α. Local accumulation of these cytokines occurs in sunburned skin, providing chemotactic factors that attract ne...

Ngày tải lên: 07/07/2014, 01:20

... penetrates to the dermis and is capable of altering structural and matrix proteins that contribute to photoaging of chronically sun- exposed skin, particularly in individuals of light complexion. ... between 290 and Photosensitivity occurs when a photon-absorbing chemical (chromophore) present in the skin absorbs incident energy, becomes excited, and transfers the absorbed...

Ngày tải lên: 07/07/2014, 01:20

... Chapter 057. Photosensitivity and Other Reactions to Light (Part 5) Polymorphous Light Eruption After sunburn, the most common type of photosensitivity disease is polymorphous light eruption ... exposure. Phototoxicity and Photoallergy These photosensitivity disorders are related to the topical or systemic administration of drugs and other chemicals....

Ngày tải lên: 07/07/2014, 01:20

... persistent photosensitivity is known as chronic actinic dermatitis. These patients are typically elderly men with a long history of Chapter 057. Photosensitivity and Other Reactions to Light (Part ... energy, become photoexcited, generate ROS, and evoke cutaneous photosensitivity. The mechanism of porphyrin photosensitization is known to be photodynamic, or oxygen...

Ngày tải lên: 07/07/2014, 01:20

... Fig. 57-1. Figure 57-1 Chapter 057. Photosensitivity and Other Reactions to Light (Part 7) Porphyria cutanea tarda is the most common type of human porphyria and is associated with decreased ... include an acute photosensitivity characterized by subjective burning and stinging of exposed skin that often An algorithm for the diagnosis of a patient with photo...

Ngày tải lên: 07/07/2014, 01:20

... dioxide 25 Chapter 057. Photosensitivity and Other Reactions to Light (Part 8) Natural photoprotection is provided by structural proteins in the epidermis, particularly keratins and melanin. ... effects of long-term UV-B phototherapy and PUVA photochemotherapy mimic those seen in individuals with chronic sun exposure and include skin dryness, actinic keratoses,...

Ngày tải lên: 07/07/2014, 01:20

... including the face, the neck, and the hands. Major risk factors include male sex, childhood sun exposures, older age, fair skin, and residence at latitudes closer to the equator. Whites of darker complexions ... but this is likely due to failure to control for confounding factors such as sunscreen stability and frequency of application. Since no prospective studies are availab...

Ngày tải lên: 07/07/2014, 01:20

... alive?") help to assess the ability to comprehend complex syntactic structure. Commands to close or open the eyes, stand up, sit down, or roll over should not be used to assess overall ... attention span. Otherwise, the failure of repetition becomes a reflection of the narrowed attention span rather Chapter 027. Aphasia, Memory Loss, and Other Focal Cerebral Disorders...

Ngày tải lên: 06/07/2014, 13:20

... Chapter 027. Aphasia, Memory Loss, and Other Focal Cerebral Disorders (Part 11) The Occipitotemporal Network for Face and Object Recognition: Prosopagnosia and Object Agnosia ... association areas of occipitotemporal cortex and then to other heteromodal and paralimbic areas of the cerebral cortex. Bilateral lesions in the fusiform and lingual gyri of the occipitot...

Ngày tải lên: 06/07/2014, 13:20

... mg/kg per day in 3 divided doses for 2–4 weeks). Chapter 140. Infections Due to the HACEK Group and Miscellaneous Gram-Negative Bacteria (Part 2) Kingella kingae Because of improved microbiologic ... age; staphylococcal and streptococcal species remain most prevalent. Invasive K. kingae infections with bacteremia are associated with upper respiratory tract infections an...

Ngày tải lên: 08/07/2014, 02:20