EESA10H3 Lecture Notes - Lecture 5: Methylmercury, Bioavailability, Lead

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mauvebadger212

9 Aug 2012

School

UTSC

Department

Environmental Science

Course

EESA10H3

Professor

Jovan Stefanovic

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Document Summary

Naturally occurring extracted from the earth"s crust: toxic even at low concentrations mostly are in the industrial section, wide environmental dispersion. Impacts the water, air, soil enters the food chain ultimately affects humans. Biomagnification increase accumulation as you go up in the food chain. Bioaccumulation accumulation of one compound/chemical in a tissue: e. g. Arsenic goes directly into nails and accumulates. Metals are classified according to toxicity and importance to the biological system: class b > borderline > class a, class a. Macronutrients animals need these in their bodies. Form ionic bonds (attraction between positive and negative ions) Mercury is toxic in its organic and inorganic form. Form covalent bonds (two ions share electrons very strong bond) They are also organometallics complexes between metals and organic compounds. In addition to this, they are also soluble when they enter the body that"s why they are very toxic. Important for biological processes in very low concentrations (as opposed to macronutrients)

Related Questions

How is over-irrigation damaging to the soil?
a. It reduces the amount of organic material in the soil.
b. It results in the accumulation of salt near the soil surface.
c. It increases the acidity of the soil.
d. It removes water from the water table.

tanpig708

3. As seen in Assignment #5 of EECS1520, Excel can be used to simulate physiological processes like thyroxine conversion in the liver. In these simulations the value of the time dependent variables, like the amount of thyroxine in the liver, is often defined using the value of the same variable from an earlier time step. This type of relation where each further term of the sequence is defined as a function of the preceding terms is called: a) backward relation b) Forward relation c) Recurrence relation x d) Bidirectional relation e) None of the above

Objective: Take a sample feed, parse it, augment it, and output individual JSON objects for each product in it.

product.txt

The file contains several fields of basic product information for 1000 products.
Data for each product is on one line, with fields separated by a vertical pipe character.

This particular retailer classifies products into a particular store, department, category, and subcategory.

Example >

A Blender might have the following "taxonomy" or category classification.

Home & Garden > Kitchen & Dining > Appliances > Blenders

Store

Department

Category

Subcategory

store_id

department_id

category_id

subcategory_id

These IDs are also represented in a sort of shorthand.

They should all be prefixed by the first three letters of their respective field name.

A store_id of 1 becomes sto1

A department_id of 2 becomes dep2

A category_id of 3 becomes cat3

A subcategory_id of 4 becomes sub4

targets.txt

A system to keep track of these various classifications
- Example
  - A store_id of sto40 maps to a “target value” of 187298 in PromoteIQ's system

Output Example:

The desired output for the first product is one line of JSON that when pretty-printed looks like:

{

"sku": "22067130",

"name": "Brainboxes ES-571 Brainboxes Es-571 Industrial Isolated Ethernet to Serial + Switch - 1 x Network (R",

"description": "Brainboxes ES-571 Brand New Includes Lifetime Warranty Product # ES-571 Factory floors can be harsh environments.",

"priceList": 387.95,

"taxonomy": [

"sto2",

"dep7",

"cat270",

"sub18532"

"targetValues": [

187167,

187177,

187950,

196404

]

}

The taxonomy IDs have been mapped to their long form and placed in the taxonomy property.

Each taxonomy ID has also been mapped to its corresponding target value ID from the targets.txt file
- and that result is stored in the targetValues
- The priceList property is the product price as a JSON float, not a string

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EESA10H3 Lecture Notes - Lecture 5: Methylmercury, Bioavailability, Lead

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