نتایج جستجو برای: ultraviolet protection
تعداد نتایج: 219057 فیلتر نتایج به سال:
as chelesterol lowering effects, antioxidant effeets, anti-tumor effects, cardioprotective effects, and protection against ultraviolet rays. However, reports of the effects of GSPE on bone are rare. We performed a mechanical analysis ef the effect of GSPE on the interior structure of rat mandibular bone in the growth period, using three-dimensional peripheral quantitative computed tomography (p...
N Habrobracon, unfertilized eggs develop normally and become haploid males; I fertilized eggs become diploid females. It has been observed that when newlylaid eggs from virgin females are exposed to ultraviolet radiation on the nuclear (convex) surfaces, embryo hatchability decreases as the exposure time is increased (VON BORSTEL and MOSER 1956; VON BORSTEL and WOLFF 1955). Most of the deaths o...
In this commentary, we discuss the skin cancer epidemic in the United States and provide data to indicate that the United States public is not protecting itself from ultraviolet radiation, the primary risk factor for melanoma, and nonmelanoma skin cancer. In our opinion, skin cancer control in this country may be hindered by uncertainty about the effectiveness of sun protection strategies, inco...
Thai plants have been used as medicines for many centuries because they contain active phytochemicals including phenolic compounds. These components function as antibiotics, help to make cell walls impermeable to gas and water, act as structural materials to give plants stability and provide protection against ultraviolet (UV) light. Hence, plants in the tropical zone including Thailand contain...
Dihydroxyacetone and lawsone, in a vanishing cream base, applied to the skin was found to protect patients with erythropoietic protoporphyria against sunlight. The use of the same ingredients in a 50% isopropyl alcohol/water solution did not induce adequate light protection. The chemically induced ultraviolet light filter in the stratum corneum allowed these patients to change their lives from ...
Ultraviolet radiation is a carcinogen that also compromises skin appearance and function. Because the ultraviolet action spectra for DNA damage, skin cancer, and vitamin D(3) photosynthesis are identical and vitamin D is readily available from oral supplements, why has sun protection become controversial? First, the media and, apparently, some researchers are hungry for a new message. Second, t...
The skin aging is the result of the association of seven factors; chronological factor, genetic factors, exposure to ultraviolet rays (photodamage), behaviour factors, endocrinous, catabolics and mechanics factors. The treatment combine sun protection measures, topical treatment, dermatological and surgical techniques (peelings, resurfacing laser, injections of collagen, botulic toxin...). The ...
This disrupts the vital functions of the skin, which include: Acting as a physical barrier for the body against mechanical and thermal injury, and hazardous substances Helping to regulate the loss of moisture Offering a degree of protection from the harmful effects of ultraviolet (UV) radiation Providing sensory and autonomic functions, i.e. touch Regulating body temperature Acting ...
The article deals with issues related to the impact of electromagnetic radiation (EMR) on humans and biological objects (bio-objects). Such types as fields low frequency microwave range, infrared ultraviolet ionizing are considered. Data harmful effects EMR given. basic principles protection against
The Sun Protection Factor (SPF) measurement is based on erythema; mainly caused by Ultraviolet B radiation (UV-B). Therefore, SPF more appropriately describes a Sunburn Protection Factor. On the other hand, the awareness for the need of protection against W-A radiation is rising and the claim for W-A or broadband protection can already be seen on sunscreen bottles around the world. Several in v...
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