Class Notes (839,573)
Canada (511,407)
Biology (6,826)
Ben Rubin (86)
Lecture

Biology 2485B - Lec 10.docx

2 Pages
94 Views

Department
Biology
Course Code
Biology 2485B
Professor
Ben Rubin

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Description
Lec 9 Feb 6, 2014 PCBs – high levels of PCBs in inuit women breast milk • Significantly high in Inuit women than in Caucasian women • Why? o Diet – bio­accumulation in food sources such as whales  High on the food chain   Long lived animals o Air currents move pollutants up towards the poles  Polar cells move pollution up into the poles  Precipitation concentrates the pollutants o Rate of incorporation > rate of breakdown + excretion • Global wind currents o Causes global distillation – polax vortex concentrates pollutants  Bio­magnification • Magnified accumulation of pollutants going up trophic levels • Depends on water solubility, air currents, persistence Industrial smog – sulfur usually from coal leads to acid rain • SO2  ▯SO3  ▯H2SO4  ▯(NH4)2SO4 • Carbon output from coal and oil makes GHGs  ▯CO2 Photochemical oxidation (smog) • Nitrogen converted by burning into nitrogen oxide (NO) o NO + O2  ▯Nitrogen dioxide (NO2) • UV radiation + NO  ▯O3 + VOC  ▯pollutants • NO + H2O  ▯nitric acid  ▯acid rain • NO2 + hydrocarbons  ▯PANS • Stratospheric ozone blocks UV light • Tropospheric ozone interacts with pollutants and creates more reactive molecules   ▯by oxidation o Depends on thermal inversion  If inverted = more smog and buildup of pollutants o Usually builds up at night time and N and O react when sun comes up Question • In the US in 1991 the risk of heart rate was quantified as an average loss of 1607  days of life expectancy. Evaluate the risk of homicide in similar terms. o Answer is 93  o Not obvious for us to judge the probabilitie
More Less
Unlock Document

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit