Mutagenic Effects of UV Light Name: sharon reakae INTRODUCTION A mutation is a permanent change in the DNA sequence of a gene. Mutation rates are usually very low but there are factors that can increase the mutation rates. These factors are referred to as mutagens and conclude a range of physic-chemical agents. UV light is a mutagen that affects all living things and has an adverse effect on the replication process of DNA within cells(.Leonard‚2002) In this experiment we examine the effects of
Premium
Effects of UV Rays Agnes Berisha Baker College of Auburn Hills July 8‚ 2010 CONFIRMATION OF AUTHORSHIP: I certify that I am the author of this paper and any assistance I received in its preparation is fully acknowledged and disclosed in the paper. I have also cited any sources from which I used data‚ ideas‚ or words‚ either quoted directly or paraphrased. I also certified that this paper was prepared by me specifically for this course. Signature: ________________________________________
Premium Vitamin D Ultraviolet Sun tanning
(Tarver‚ 2012) Exposure to UV radiation is the leading cause of most skin cancers as it induces DNA damage in skin cells. The effects of UV radiation can be classified based on the amount of exposure as acute or chronic. Acute side effects include sunburns and chronic effects can be mutagenic and also increase aging in humans. (Pacholczyk‚ 2015) The effects of UV radiation are significant
Premium Cancer Oncology Breast cancer
ABSTRACT: By exposing Brassica rapa seedlings to UV-C light‚ the effect of the growth and development of Brassica rapa seedlings was tested. The experimental group of Brassica rapa seedlings was exposed to 254 nm UV-C light for thirty seconds after one week of growth. Throughout the duration of one month‚ the height‚ number of leaves and stem diameter were measured sporadically. After one month‚ the biomass of the seedlings was recorded. A starch analysis test was also performed. According to the
Premium Ultraviolet Sunlight Sun
We hypothesized that the amount of UV radiation exposed has a negative correlation with yeast genetic stability‚ which ultimately determines the number of yeast colonies. In this experiment‚ yeast cells were treated with UV radiation‚ protected by photoprotective agents with different strength (in ascending order: Sunscreen #2‚ #1‚ aluminium foil). After letting it grow for seven days at 37 degrees‚ some grown colonies were counted to determine the effectiveness of photoprotective agents. After comparing
Premium Ultraviolet Sunscreen Mutation
Bio coursework Methylene blue Yeast cells explanation of respiration hence colour change etc Low temp colour change should be visible as the yeast cells are not necessarily dead‚ just inactive. Activity increases from 20-45 c High rate around 30-40 Starts to slow down basically enzyme curve see bio 1 100 degrees will kill all cells Do a few preliminary keep working down until first blue solution appears in unit of ten Then work to find degree. If more accuracy then half
Premium Yeast
The Effect of Yeast on Different Fruit Juices | Researched by Kristyn S. 2001-02 | * PURPOSE * HYPOTHESIS * EXPERIMENT DESIGN * MATERIALS * PROCEDURES * RESULTS * CONCLUSION * RESEARCH REPORT * BIBLIOGRAPHY * ACKNOWLEDGEMENTS * ABOUT THE AUTHOR | PURPOSEThe purpose of this experiment was to determine the amount of fermentation of four different fruit juices after adding yeast. I became interested in this idea when I saw the fruit in my family’s refrigerator
Premium Yeast
Abdulaziz Design Lab Report Research Question: How is the rate of yeast fermentation of 7.5g of yeast affected by using different companies of yeast (Bakon Yeast Inc.‚ Lake States Yeast LLC‚ Lesaffre Yeast Corp‚ Red Star Yeast Company‚ and Minn-Dak Yeast CO Inc.)? Background Information: Yeast is a fungal microorganism that is used to manufacture mainly bread and beer. It reproduces rapidly. Fermentation is the process by which yeast takes in sugar and releases alcohol and carbon dioxide. Fermentation
Premium Yeast Carbon dioxide
Meteorology 11 October 2013 Harmful UV Rays and Their Differences As we all know being over exposed to the sun and its harmful rays can be very dangerous for your skin‚ and may lead to skin cancer‚ but there are some UV rays that are more dangerous than others. Coming from the skin cancer stand point the most dangerous rays are UVB rays‚ they are the main cause of most skin cancers. Although UVB rays are the most harmful to our skin it has the second shortest wavelength coming in at 290-320
Premium Ultraviolet Sunscreen Human skin color
Technical Specification Sheet For UV-Spectrophotometer | | Wavelength range | 190 to 1‚100 nm | Spectral bandwidth | 1 nm (190 to 1‚100 nm)/ variable Low stray light < 0.12%T (220 nm‚ NaI 340nm‚ NaNO2>2.0 Abs) | Wavelength accuracy | ± 0.1 nm at D2 peak 656.1 nm‚ | | ± 0.3 nm for entire range | Reproducibility | ±0.1 nm | Resolution | 1 nm more than 6 wave lengths | Photometric system | Double beam optics | Photometric range | Absorbance: -4 to 4 Abs | | Transmittance:
Premium Hertz Wavelength