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Author: Francis P. Gasparro Publisher: Springer Science & Business Media ISBN: 3662101351 Category : Medical Languages : en Pages : 205
Book Description
Sunscreens are universally recommended by dermatologists not only to prevent the immediate effects of overexposure to sunlight but also to prevent skin cancer. While the former goal is immediately evident, the latter remains an unproven hypothesis and is a topic of some controversy. Recent epidemiological studies suggesting a correlation between increased use of sunscreens over the past two decades and the rise in skin cancer have led to the question whether sunscreens applied to skin may be undergoing photoreactions, the effects of which are elaborated many years later. By addressing the key questions, this book advances the field of sunscreen photobiology and provides the reader with an unbiased perspective on this important field.
Author: Francis P. Gasparro Publisher: Springer Science & Business Media ISBN: 3662101351 Category : Medical Languages : en Pages : 205
Book Description
Sunscreens are universally recommended by dermatologists not only to prevent the immediate effects of overexposure to sunlight but also to prevent skin cancer. While the former goal is immediately evident, the latter remains an unproven hypothesis and is a topic of some controversy. Recent epidemiological studies suggesting a correlation between increased use of sunscreens over the past two decades and the rise in skin cancer have led to the question whether sunscreens applied to skin may be undergoing photoreactions, the effects of which are elaborated many years later. By addressing the key questions, this book advances the field of sunscreen photobiology and provides the reader with an unbiased perspective on this important field.
Author: E. Riklis Publisher: Springer Science & Business Media ISBN: 1461537320 Category : Science Languages : en Pages : 1028
Book Description
It is not always the case that the subject of a scientific book and its relevance to everyday li fe are so timely. Photobiology and its si ster subject Radiobiology are now a must for understanding the environment we live in and the impact light, ultraviolet light, and radiation have on all aspects of our life. Photobiology is a true interdisciplinary field. Photobiology research plays a direct role in diverse fields, and a glance at the topics of the symposia covered in this book by over 100 articles shows the breadth and depth of knowledge acquired in fundamental research and its impact on the major issues and applied problems the world is facing. Half a century of photobiology research brought about an understanding of the importance of light to life, both as a necessary source of energy and growth as weIl as its possible dangers. Research in photochemistry and photobiology led to the discoveries of ceIlular repair mechanisms of UV induced damages to DNA and this led to understanding of the effects of hazardous environmental chemieals and mutagenecity , and to the development of genetic engineering. This topic was given due emphasis in several symposia and chapters in this book.
Author: Peter A. Ensminger Publisher: Yale University Press ISBN: 0300133529 Category : Science Languages : en Pages : 288
Book Description
Which fungus is as sensitive to light as the human eye? What are the myths and facts about the ozone hole, tanning, skin cancer, and sunscreens? What is the effect of light on butterfly copulation? This entertaining collection of essays explores how various organisms -- including archaebacteria, slime molds, fungi, plants, insects, and humans -- sense and respond to sunlight. The essays in Peter A. Ensminger's book cover vision, photosynthesis, and phototropism, as well as such unusual topics as the reason why light causes beer to develop a "skunky" odor. He introducec us to the kinds of eyes that have evolved in different animals, including those in a species of shrimp that is ostensibly eyeless; gives us a better appreciation of color vision; explains how plowing fields at night may be used to control weeds; and tells about variegate porphyria, a metabolic disease that makes people very sensitive to sunlight and may have afflicted King George III of England. These engaging essays present a complicated yet fascinating subject in an accessible way. The book will be treasured by anyone interested in the wonders of biology.
Author: Zacarías León González Publisher: Springer Science & Business Media ISBN: 3319011898 Category : Science Languages : en Pages : 224
Book Description
Zacarías León's thesis describes the development and validation of analytical methods to estimate the processes set in motion by percutaneous absorption of UV filters in sunscreen cosmetic products. León describes these methods in both in vitro and non-invasive in vivo methodologies. Currently dermatologists recommend the use of sunscreen products not only under conditions of extreme exposure to the sun but also in daily situations. However the chemical compounds in these products contain may lead to undesired processes and cause induced toxicity, estrogenic effects and endocrine activity. León establishes methods to investigate these effects and provides valuable information on the undesired side effects associated with the use of UV filters found in sunscreen products. The work in this thesis has led to a number of publications in renowned analytical chemistry journals.
Author: Kendric C. Smith Publisher: Elsevier ISBN: 1483222454 Category : Science Languages : en Pages : 249
Book Description
Molecular Photobiology: Inactivation and Recovery describes the deleterious photochemical reactions occurring in biological systems. This book is composed of 10 chapters that specifically tackle light interactions in the ultraviolet region of the spectrum resulting to damaged proteins and nucleic acids in living systems. This book deals first with the kinds of photochemical reactions that can occur and the possible effects of photochemistry on molecular, cellular, and organismal levels. The succeeding chapters highlight the principle of recovery mechanisms, wherein evidence shows that cells can repair their damaged genetic material, and thus recover from the otherwise inactivating effects of light. The remaining chapters are devoted to the comparison and contrast of some biological effects of ionizing radiation and those of ultraviolet radiation. This book is of value to molecular photobiologists, photochemists, biochemists, and radiation scientists and researchers.
Author: Paolo U Giacomoni Publisher: Royal Society of Chemistry ISBN: 1847557953 Category : Science Languages : en Pages : 352
Book Description
In an era of global warming knowledge of the effects of solar radiation on humans is of great importance and the latest discoveries in environmental photobiology are presented in this book. The Editor has brought together a wide range of world class contributors to provide the reader with information on the clinical effects of solar radiation, such as inflammation, pigmentation, immune-suppression, cancer and aging, with emphasis on the ethnic or genetic background. The book also offers updates on the biochemical mechanisms involved in the generation of damage to DNA, lipids and proteins and on their removal. Each chapter has been written to provide a "historical" description of the phenomenology followed by the description of the state of the art. In this way, non-specialized and specialised readers alike can be updated in the essential aspects of the field. Key topics include: - Damages from acute versus chronic sun exposure - Skin Color, Melanin, Race/Ethnicity and UV-Induced DNA Damage - The effects of solar radiation on the immune response in humans - Genetic background and UV-induced skin cancer - The photochemistry of indirect damages: Lipid and Protein Damage provoked by UV radiation - DNA repair therapy This title will become an indispensable resource for students and professional at all levels working in fields relating to photochemistry, environmental science, biochemistry and biotechnology.
Author: Alana Rosen Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Sunscreen products contain chemicals such as oxybenzone or minerals such as titanium dioxide (TiO2) and zinc oxide (ZnO), which are a threat to marine biota and especially to coral reefs. Mineral sunscreens are being marketed as "reef-safe"; however, their impacts on marine organisms are not well understood. The aim of my thesis was to evaluate the effects of oxybenzone, TiO2, and ZnO on photophysiological properties of sea anemone Anthopleura elegantissima. This invertebrate belongs to the phylum Cnidaria and is a close relative to reef-building corals. Anemones were exposed to three environmentally relevant concentrations of oxybenzone, TiO2, and ZnO (nominally, 0.01 microgram/L, 0.1 microgram/L, and 1 microgram/L) for 21 days, followed by seven days of recovery in the absence of sunscreen ingredients. Throughout this 28-day period, measurements of fluorescence intensity and photosynthetic efficiency were taken as proxies for anemone photophysiology. The sunscreen ingredients did not seem to affect either parameter over the course of the experiment. However, analyses of seawater samples using inductively coupled plasma-mass spectrometry (ICP-MS) revealed prominent mismatches in the concentrations of TiO2 and ZnO compared to the target values, including much higher concentrations in the controls than in treatment samples. Furthermore, gas chromatography-mass spectrometry (GC-MS) analysis failed to detect oxybenzone. Overall, the unexpectedly high TiO2 and ZnO concentrations measured in the experimental aquarium coupled with oxybenzone analysis issues prevented reaching conclusions about their potential toxicity on anemone photophysiology. These factors must be considered for future studies aiming to assess potential toxic effects of sunscreen compounds on marine life.
Author: Francis P. Gasparro
Author: Francis P. Gasparro
Author: Francis P Gasparro
Author: E. Riklis
Author: Peter A. Ensminger
Author: Zacarías León González
Author: Kendric C. Smith
Author: Paolo U Giacomoni
Author: 
Author: 
Author: Alana Rosen