نتایج جستجو برای: اشعه یونیزان ionizing radiation
تعداد نتایج: 245389 فیلتر نتایج به سال:
IN comparative studies of the mutagenic action of ionizing and ultraviolet radiation on conidia of the fungus Glomerella (5) it was evident that the shape of the mutation curve was different for the two types of radiation. The dose-mutation curve for the surviving spores was essentially linear for the ionizing radiations, but with the ultraviolet radiation the mutation curve rose with increasin...
Radiation-induced damage is a complex network of interlinked signaling pathways, which may result in apoptosis, cell cycle arrest, DNA repair, and cancer. The development of thyroid cancer in response to radiation, from nuclear catastrophes to chemotherapy, has long been an object of study. A basic overview of the ionizing and non-ionizing radiation effects of the sensitivity of the thyroid gla...
زمینه و هدف: لیکوپن یکی از مؤثرترین آنتیاکسیدانها است. بهعلاوه لیکوپن، یک رنگدانة قرمز و محلول در چربی است که در برخی از گیاهان و میکروارگانیسمها یافت میشود. مطالعات متعددی توانایی لیکوپن را برای حفاظت از سلول در مقابل آسیبهای ناشی از پرتوهای یونیزان نشان داده اند، اما مکانیسم عمل حفاظتی آن بهخوبی روشن نیست. در این مطالعه، اثر لیکوپن برای مقابله با سیتوتوکسیسیتی و ژنوتوک...
Radiation is the emission or transmission of energy as waves particles through space a material medium which able to penetrate various materials and often categorized either ionizing non-ionizing depending on radiated particles. processing can be defined exposure with high radiation change their physical, chemical, biological characteristics, increase usefulness, safety purpose, reduce harmful ...
Astrophysical ionizing radiation events have been recognized as a potential threat to life on Earth, primarily through depletion of stratospheric ozone and subsequent increase in surface-level solar ultraviolet radiation. Simulations of the atmospheric effects of a variety of events (such as supernovae, gamma-ray bursts, and solar proton events) have been previously published, along with estima...
New technologies are evolving day to day life to facilitate human being. Mobile communication is currently the fastest growing communication system in the telecommunication industry. Due to the increased number of users using the mobile phone, the concern is now focused towards electromagnetic radiations emitted by the mobile phones itself. Electromagnetic radiation can be classified into ioniz...
introduction : the fast-growing telecommunication and wireless technologies has led to more dependence to these communication devices and higher levels of exposure to electromagnetic radiations propagated by cellular devices and their service towers. to disable signaling in places where silence is valued or where information quarantine measures are required, mobile phone jammers emit radiofrequ...
background : effects of electromagnetic fields on healing have been investigated for centuries. substantial data indicates that exposure to electromagnetic field can lead to enhanced healing in both soft and hard tissues. helmholtz coil is a device that generates pulsed electromagnetic fields. objective : in this study, a pair of helmholtz coils for enhancing the healing process in periodontiti...
Discovery of x-ray and using of it for medical imaging have produced tremendous outcomes for diagnosis and treatment of diseases. More than 10 million diagnostic radiological procedures and 100,000 nuclear medicine exams are being performed daily around the world. According to the national commission on radiological protection and measurements (NCRP)-report 160, medical x-ray is contribute to a...
Several attempts have been made to use ionizing radiation as a means of inactivating viruses so that they can be employed as killed vaccines. Success has been achieved with a rabies virus, and trials have also been made with poliomyelitis virus.""7 These methods have not been used for practical purposes, partly because of their novelty, because of the expense in the original setting up of the e...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید